JPH0872130A - Insert blow molding apparatus and method - Google Patents

Abstract

(57) [Summary] [Object] To provide an insert blow molding apparatus and method capable of shortening the insert moving time of an insert member and improving the insert position accuracy. [Structure] A plurality of insert members 20 are inserted into a plurality of preforms 50 subjected to a temperature control process at positions facing a temperature control section 72 for performing a temperature control process which is a pre-process of a blow molding process. An insert device 120 is arranged. The insert device 120 has a plurality of pairs of chuck pieces 122 that support the plurality of insert members 20 along a direction parallel to the arrangement direction (B direction) of the plurality of preforms 50. An advancing / retreating drive unit 126 is provided for advancing / retreating the plurality of pairs of chuck pieces 122. The forward / backward drive direction of the insert member 20 is a horizontal direction (C direction) orthogonal to the arrangement direction of the preforms 50. The plurality of pairs of chuck pieces 122 includes a plurality of insert members, and a transfer path D of the preform 50.
It is driven back and forth between the position retracted from and the position on the transport path D of the preform 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert blow molding apparatus and method, and more particularly to an insert apparatus and an insert method for mounting an insert member on a preform before a blow molding process.

[0002]

2. Description of the Related Art As an insert blow molding apparatus of this type, there is one disclosed in Japanese Patent Laid-Open No. 1021/1992. This insert blow molding device is for molding a bottle with a handle, in which a preform and a handle member are arranged in a blow mold,
The bottle and the handle member are engaged and integrated with each other during the biaxial stretch blow molding of the preform.

In this insert blow molding device, the handle member is directly inserted into the blow mold. The drive of this inserter is as follows. First, a blow mold constituted by split molds is provided with two bottle cavities at a predetermined pitch for simultaneous blow molding, and
Two handle grooves for inserting the handle member are also provided so as to communicate with each cavity. The two preforms arranged in the blow mold are supported by the neck mold at the same pitch as the cavity. In this insert device, the insert direction in which the handle member is moved from the retracted position to the insert position is set in the horizontal direction orthogonal to the opening / closing direction of the split mold that constitutes the blow mold. In other words, the insert direction of the handle member of the insert device is
In the plan view of the insert blow molding apparatus, the line is set on the same line as the arrangement line of the two preforms held by the neck mold arranged in the blow mold.

As described above, when the handle member is inserted along the inserting direction of the same line as the arrangement line of the plurality of preforms in plan view, the following problems occur.

The moving amount of the insert of the handle member for this insert increases as the number of simultaneously molded pieces increases.
Therefore, the insert time increases. Further, since the insert device is performed by a cantilever-shaped arm, the length from the fixed end to the free end of this arm becomes long, and the insert device becomes large in size. Further, the amount of arm bending cannot be ignored, and it becomes impossible to set an accurate insert position.

Further, in the case where the neck mold is rotationally conveyed to each process section in this kind of insert blow molding apparatus, the rotational loci of a plurality of preforms conveyed at the same time are taken into consideration, and The retracted position of the handle member must be set at a position where interference does not occur. For this reason, the amount of insert movement further increases, and this amount of insert movement also increases in accordance with the number of simultaneous moldings, making the above-mentioned problem even more serious.

Next, when the insert step of the insert member such as the handle member is carried out in the blow molding section as in Japanese Patent Laid-Open No. 4-1021, the blow molding section is operated only for the time during which the insert step is carried out. The problem arises that the blow molding time is restricted. Particularly, in the case of the hot-parison type and rotary-conveying type insert blow molding apparatus, the neck mold is intermittently rotationally conveyed in accordance with the injection molding cycle time in the injection molding section. Therefore, in the blow molding section, unless the insert step and the blow molding step are completed within the time for carrying out the injection molding cycle, the cycle time of the entire apparatus becomes long. Generally, blow molding time is much shorter than injection molding cycle time,
As described above, if the insert moving time is increased, there is a risk that the blow molding time will be restricted.

[0008] Incidentally, Japanese Utility Model Publication No. 60-14675 discloses a technique of inserting the ring portion of the handle member under the neck of the preform and conveying it to the blow molding portion. And the insert device is completely unexplained.

Therefore, it is an object of the present invention to provide an insert blow molding apparatus and method capable of completing the insert process in a short time by shortening the moving distance of the insert member for the insert.

Another object of the present invention is to carry out the insert step without adversely affecting the cycle time, by performing the insert step of the insert member in the temperature control section for controlling the temperature of the preform before blow molding. It is an object of the present invention to provide an insert blow molding apparatus and method capable of performing the same.

Still another object of the present invention is to provide an insert blow molding apparatus and method capable of carrying out the temperature control step as usual while performing the insert step in the temperature control section.

Still another object of the present invention is to provide a container molded by the insert blow molding apparatus according to the present invention, which is provided with a handle having a shape suitable for engaging just under the neck portion. To do.

[0013]

According to a first aspect of the present invention, a plurality of resin preforms are simultaneously conveyed to a blow molding section by neck supporting means for supporting a neck portion of the preforms, and the blow molding is performed. An insert blow molding device in which the preform and insert member are arranged in a blow mold provided in a section, a container is blow molded from the preform, and the insert member is integrated with the container by the blow molding. In, having an insert device for inserting the insert member into each of the plurality of preforms supported by the neck support means, the insert device is opposed to the plurality of preforms, and a plurality of the A plurality of insert members supporting a plurality of the insert members are arranged along a direction parallel to the arrangement direction of the preforms. A plurality of the support pieces are provided between a holding piece and a position along the horizontal direction orthogonal to the arrangement direction of the preforms, the position being retracted from the conveyance path of the preforms and the position on the conveyance path of the preforms. And an advancing / retreating drive means for driving the advancing / retreating.

By moving the insert member along the horizontal direction orthogonal to the preform arranging direction as in the first aspect of the present invention, the amount of insert movement between the retracted position and the insert position is minimized, and the apparatus is also compact. Turn into. Therefore, the time required for the insert is shortened, and even if the supporting piece is supported in the shape of a cantilever, the distance between the fixed end and the free end is shortened, and highly accurate movement with less bending can be realized.
Accurate inserts can be made.

According to a second aspect of the present invention, in the first aspect, the insert member has a ring-shaped portion which is inserted from the bottom side of the preform and which is arranged immediately below the neck portion of the preform. , The insert device is
It further comprises an elevating means for elevating and driving the ring-shaped portion of the insert member between a first lower position below the preform and a position just below the neck portion of the preform. To do.

According to the second aspect of the present invention, even when the insert member has a ring-shaped portion as the engaged portion, the insert member is inserted into the preform by moving the insert member upward after the horizontal movement. can do. At this time, since the movement can be performed with high accuracy, it is possible to eliminate the problem that the ring-shaped portion of the insert member comes into contact with the preform.

According to a third aspect of the present invention, in the first or second aspect, the neck supporting means is a neck type that defines the outer wall of the neck portion when the preform is injection-molded.

According to the third aspect of the present invention, the preform is conveyed by the neck mold, and the insert member is inserted into the preform held by the neck mold, so that the preform that retains the heat during injection molding can be used. Insert blow molding can be performed by a hot parison method for molding.

According to a fourth aspect of the present invention, in the third aspect, a temperature adjusting section for adjusting the temperature of the preform to a blow molding temperature is provided between the preform molding section and the blow molding section. Is arranged so as to face the temperature control unit.

According to the invention of claim 4, the insert by the insert device is performed in the temperature control section. The temperature control section
Compared to a blow molding section in which a relatively large blow mold corresponding to a container to be blow molded is installed, there is more empty space, and it is easier to secure a space for inserts. Therefore,
A design that prevents interference with a member arranged in the temperature control unit can be easily performed when the insert step is performed. Further, since the temperature control process in the temperature control unit can be set shorter than the time required for the blow molding process in the blow molding unit, it is possible to secure a sufficient time for performing the insert process.

According to a fifth aspect of the present invention, in the fourth aspect, the temperature control section has a temperature control pot arranged around the preform, and the temperature control pot further below the first position. It has a means for moving up and down between a second lower position and a position surrounding the periphery of the preform.

According to the fifth aspect of the invention, the temperature control pot is retracted to the second lower position, so that it is possible to prevent interference with the support piece that supports the insert member. In this temperature control unit, the insert process is performed at times other than the temperature control process using the temperature control pot, but the temperature control process is short compared to the injection molding cycle time, and furthermore, due to the configuration described above. Since the insert time can be shortened, the temperature control process is not adversely affected.

According to a sixth aspect of the present invention, a plurality of preforms and a plurality of insert members are arranged by neck supporting means in a plurality of blow cavities provided in the blow mold, and a plurality of preforms are provided. In the insert blow molding method in which the container is blow-molded and each of the insert members is integrated with each of the containers by the blow molding, a plurality of the preforms stopped on the way to the blow mold are conveyed. On the other hand, there is a step of inserting a plurality of the insert members by an insert device, the insert step, facing the plurality of preforms at the stop position, and the arrangement direction of the plurality of preforms. The same number of the insert members as the preforms are provided on the plurality of support pieces arranged along the parallel direction. And a step of transporting the plurality of support pieces respectively supporting the insert members toward the plurality of preforms in a horizontal direction orthogonal to the arrangement direction of the preforms. Is characterized by.

According to the invention of claim 6, after supplying the plurality of insert members to the support piece, the support piece is moved by a relatively short horizontal distance along the horizontal direction orthogonal to the arrangement direction of the preforms. Thus, the retracted position can be set to the insert position.

According to a seventh aspect of the present invention, in the sixth aspect, in the inserting step, the ring-shaped portion provided on the insert member is inserted into the preform from the bottom side of the preform after the horizontal conveyance. In addition, the method further comprises a step of ascending and conveying the preform to a position just below the neck portion of the preform.

According to the seventh aspect of the present invention, even when the insert member has a ring-shaped portion as the engaged portion, the insert member is inserted into the preform by moving the insert member upward after the horizontal movement. can do. At this time, since the movement can be performed with high accuracy, it is possible to eliminate the problem that the ring-shaped portion of the insert member comes into contact with the preform.

According to an eighth aspect of the present invention, in the seventh aspect, the step of injection-molding the preform by using a neck mold which is also used as the neck supporting means, and the preform conveyed by the neck mold. A temperature control step of stopping the temperature control section to control the preform to a blow molding temperature, and the insert step is performed in the temperature control section after the temperature control step is performed. And

According to the present invention of claim 8, the present invention is applied to a hot parison type insert blow molding method by using a neck mold as a neck supporting means. Furthermore, since the insert process is performed after the temperature control process is completed, the temperature of the preform can be controlled without inserting the insert member, and the temperature control operation is not hindered. In addition, the insert step can be performed in the temperature control section in which there is a relatively large amount of empty space and it is easy to secure a space for insert. Furthermore, the temperature control process is relatively short, and the insert time can be shortened by performing the above-described insert process, so that the temperature control process is not adversely affected.

According to a ninth aspect of the present invention, in the eighth aspect, in the insert step, the temperature of the insert member is conveyed by the support piece by performing a temperature adjustment step by a temperature adjustment pot arranged around the preform. After that, it is performed after the temperature control pot is retracted to a position where it does not interfere with the insert member supported by the support piece.

According to the ninth aspect of the present invention, the insert step after the temperature adjusting step can be easily carried out only by retracting the temperature adjusting pot, which is the only member that obstructs the insertion at the temperature adjusting section. it can.

According to a tenth aspect of the present invention, in any one of the seventh to ninth aspects, in the insert step, the insert member constitutes an outer layer container of the double-walled container formed in the blow molding step. The step of inserting the outer layer container, which is the ring-shaped portion, into the preform from the bottom side of the preform, and inserting the outer layer container at a peripheral position surrounding the preform. The blow molding step is characterized in that, in the outer layer container arranged in the blow cavity, an inner layer container is biaxially stretch blow molded from the preform to form the double wall container. .

According to the tenth aspect of the present invention, the insert member is the outer layer container of the double-walled container, so that the conventional double-walled molding technique for which injection control is extremely difficult is not used. The container can be molded.

According to an eleventh aspect of the present invention, in any one of the seventh to ninth aspects, the insert is a handle member including a ring portion that serves as the ring-shaped portion and a grip portion, and the ring portion. Through the preform from the bottom side of the preform, including a step of inserting at a position directly below the neck portion, the blow molding step, the biaxial stretch blow from the preform in the blow cavity. A container with a handle in which the container body and the handle member are integrated is formed.

According to the eleventh aspect of the present invention, even though the insert member having the ring-shaped portion that can be firmly engaged with the container body is used, the ring-shaped portion is moved directly below the neck portion of the preform by horizontal movement and upward movement. Can be inserted. In addition, the handle member can be inserted into the preform that is accurately positioned and held by the neck mold, and the insert member that requires insert direction with respect to the preform can be accurately inserted.

A thirteenth aspect of the present invention is a container with a handle formed by the molding method according to the eleventh aspect, wherein the container body has an outwardly projecting portion at a position immediately below the neck portion. The ring portion of the handle member has a first locked portion that abuts a lower surface of the protruding portion during the insertion, and a locked piece that elastically deforms during the insertion,
A second locked portion disposed above the locked piece and abutting the upper surface of the protruding portion after elastically deforming.

According to the twelfth aspect of the invention, since the upper and lower surfaces of the projecting portion of the container body are sandwiched by the first and second engaged portions of the inserted handle member, the handle member is inserted after the insertion. Does not fall off, and the structure is suitable for the insert.

According to a thirteenth aspect of the present invention, in the twelfth aspect, the ring portion of the handle member has an annular wall portion provided outside the locked piece with a distance from the locked piece. A container with a handle characterized in that

According to the thirteenth aspect of the present invention, the concavo-convex shape caused by the presence of the locked piece can be covered with the annular wall portion, and the annular wall portion is provided at a distance from the locked piece. The elastic deformation of the locked piece is allowed.

According to a fourteenth aspect of the present invention, in the thirteenth aspect, the height of the annular wall portion is not less than the height of the locked piece.

According to the fourteenth aspect of the present invention, the concavo-convex shape generated by the locked piece is completely surrounded by the annular wall portion, and the appearance can be maintained like a normal ring.

[0041]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The insert blow molding apparatus and method to which the present invention is applied will be specifically described below with reference to the drawings.

First Embodiment In this first embodiment, an outer bottle is used as an insert member,
A double-walled bottle is molded by blow molding the inner bottle in the outer bottle.

Double-Wall Bottle and Preform Therefor FIG. 1 (A) is a sectional view showing a state in which an outer bottle is inserted into a preform for molding an inner bottle, and FIG. It is sectional drawing which shows the cross section different from the figure (A) in the state where the outer bottle of A) is not attached. Further, FIG. 2 is an enlarged view of part A of FIG. 1 (A), and FIG. 3 is a front view in which a part of the double-walled bottle is cut away.

First, the structure of the double-walled bottle 10 will be described with reference to FIG. The double-walled bottle 10 includes an outer bottle 20 and an inner bottle 40. The outer bottle 20 is composed of an opening 22 on the upper end side, a bottom 24 sealed on the lower end side, and a body 26 connecting the opening 22 and the bottom 24. In the body portion 26, a plurality of air vent holes 28 penetrating in and out are formed, for example, along the longitudinal direction of the outer bottle 20.

As shown in FIG. 3, the opening portion 22 of the outer bottle 20 is formed with a flange portion 30 protruding radially outward in a ring shape. A ring-shaped recess 32 is continuously formed in the outer wall of the flange portion 30 in the circumferential direction. Further, a stepped portion 34 is formed on the inner wall side of the flange portion 30 as shown in an enlarged manner in FIG.

The inner bottle 40 disposed inside the outer bottle 20 has a neck portion 4 on the upper end side as shown in FIG.
2, a closed bottom portion 44 at the lower end portion, and a body portion 46 connecting them. The neck portion 42 is formed with a threaded portion 42a in an upper region thereof, and in a lower region thereof, a flange portion 42b protruding radially outward in a ring shape.

In this double-walled bottle 10, the flange portion 30 of the outer container 20 is replaced by the flange portion 42b of the inner bottle 40.
Then, the inner bottle 40 is sandwiched between the body portions 46 of the inner bottle 40, and the inner bottle 40 is supported so as not to drop from the inside of the outer bottle 20.

A preform 50 used for molding the inner bottle 40 is shown in FIGS. 1 (A) and 1 (B). The preform 50 has a neck portion 52 having substantially the same shape as the neck portion 42 of the inner bottle 40 because it is not blow molded. Further, the lower end side of the preform 50 becomes a closed bottom portion 54, and the neck portion 52 and the bottom portion 54 are connected by a body portion 56. As described above, the neck portion 52 of the preform 50 has substantially the same shape as the neck portion 42 of the inner bottle 40,
The neck portion 52 of the preform 50 also includes the screw portion 42.
a and a flange portion 42b are formed.

Overview of Insert Blow Molding Apparatus An insert blow molding apparatus 60 used for molding the double-walled bottle 10 is shown in FIG. The insert blow molding device 60 includes a base 62 and an upper base 64 arranged at an upper position facing the base 62. A turntable 66 is rotatably supported on the lower surface side of the upper base 64. The rotation angle of this turntable 66 is 90 °
An injection molding section 70, a temperature control section 72, a blow molding section 74, and an ejecting section 76 are provided in the four regions. An injection device 68 is arranged on the base 62 at a position facing the injection molding section 70.

In the injection molding section 70, the preform 50 for the inner bottle 40 is injection molded. The preform 50 is conveyed to the temperature control section 72, where it is temperature-controlled to an appropriate temperature for stretching. With respect to the temperature-controlled preform 50, the temperature-adjusting section 72 allows the outer bottle 20 which is an insert member.
Is inserted. For this purpose, the insert device 120 is provided so as to face the temperature adjusting section 72. A transport path 118 is connected to the insert device 120, and the outer bottle 20 is supplied along the transport path.

The preform 50 having the outer bottle 20 inserted therein is then conveyed to the blow molding section 74. In the blow molding part 74, in the outer bottle 20,
The inner bottle 40 is blow-molded from the preform 50 to mold the double-walled bottle 10. Thereafter, the double-walled bottle 10 is transported to the ejecting section 76, where it is ejected from the bottle transporting jig. This bottle 10
In order to take out from the insert blow molding device 60,
A bottle take-out device 78a is provided at a position facing the eject unit 76. A transport path 78b is connected to the bottle unloading device 78a, and the bottle 10 is unloaded along the transport path 78b.

Neck Type and Engagement Mechanism As shown in FIG. 4, neck type fixing plates 80 are fixed at four positions of the rotary disk 66 at every 90 ° rotation angle. The neck type fixing plate 80 includes a plurality of, for example, two neck types 90.
Is provided.

This neck mold 90 is shown in FIGS.
Will be described with reference to. The neck mold 90 is used as an injection cavity mold for molding the neck portion 52 of the preform 50 in the injection molding unit 70, and thereafter, is rotated and conveyed integrally with the turntable 66, so that the preform 50 is formed. Alternatively, it is also used as a carrying jig for the double-walled bottle 10. For this reason, a cavity surface 92 for defining the outer wall of the neck portion 52 of the preform 50 is formed on the inner wall surface of the neck mold 90.

As a characteristic structure of the neck mold 90, the preform 5 held by the neck mold 90 is used.
An engaging mechanism 100 for engaging and holding the outer bottle 20 is provided in a region immediately below the neck portion 52 of 0.
The engagement mechanism 100 includes an extension wall portion 94 formed by extending the neck die 90 itself downward and a ball plunger 102 held by the extension wall portion 94.

The extension wall portion 94 is provided so as to face the outer wall immediately below the neck portion 52 of the preform 50 held in the neck shape, and a space 96 is formed between the outer wall and the extension wall portion 94. The gap 96 is for inserting the flange portion 30 which is the engaged portion of the outer bottle 20 which is the insert member.

Details of the ball plunger 102 built in the extension wall portion 94 are shown in FIG. 2 which is an enlarged view of the portion A of FIG. 1 (A). This ball plunger 102
Cylindrical body 104 and bottomed hole 10 formed in this cylindrical body 104
6 and. The bottomed hole 106 has an opening 106a communicating with the void 96 and a bottom portion 106b facing the opening 106a. A ball 108, which is a pressing member, is arranged near the opening 106a of the bottomed hole 106. Also, the bottomed hole 1
An urging member such as a compression coil spring 109 is arranged inside the 06 between the bottom portion 106b and the ball 108. With this structure, the ball 108 is constantly urged to move toward the gap 96 by the urging force of the compression coil spring 109. This ball 1
In order to prevent the protrusion of 08, the tip portion 1 of the cylindrical body 104
Due to the shape of 04a, the opening width of the opening 106a of the bottomed hole 106 is formed smaller than the diameter of the ball 108. Further, the position where the ball 108 projects means the ring-shaped recess formed in the flange portion 30 of the outer container 20 when the outer container 20 which is an insert member is inserted into a position immediately below the neck portion 52 of the preform 50. The position is opposite to the place 32.

Next, the insert blow molding device 6 described above.
A method of blow molding the double-walled bottle 10 using No. 0 will be described.

Injection Molding Process of Preform 50 In the blow molding part 70 shown in FIG. 4, the neck mold 90 and the injection cavity mold and the injection core mold (not shown) are clamped and injected into the cavity formed by them. The preform molding resin material supplied from the apparatus 68, for example, polyethylene terephthalate (PET) is filled. By this injection molding operation, the preform 50 is injection molded, and after a predetermined cooling time, the injection core mold and the injection cavity mold are released. As a result, as shown in FIG. 1 (B), the injection-molded preform 50 has the neck mold 9
It will be held by 0.

Temperature Control Process of Preform 50 The injection-molded preform 50 has a 90 ° rotary disc 66.
The temperature control part 7 is held by the neck mold 90 by the rotation.
It is transported to 2. The temperature control process of the preform 50 in the temperature control unit 72 will be described with reference to FIGS. 5 and 7. The temperature control process of this preform 50 is shown in FIGS.
The temperature control pot 110 shown in FIG. When the preform 50 is conveyed to the temperature control section 72, the temperature control pot 1
As shown in FIG. 5, 10 stands by at a position below the preform 50.

The temperature control pot 110 is the air cylinder 1
It is connected to a rod 114 which is driven forward and backward by 12. Therefore, by driving the air cylinder 112, as shown in FIG.
Can be raised to a position surrounding the preform 50 as shown in FIG. In addition, this temperature control pot 110
While the ascending drive of the outer container 20 is an insert member,
Is retracted to the position indicated by the chain line in FIG. 5, that is, the position indicated by the solid line in FIG. Therefore, the outer container 20 which is an insert member and the temperature control pot 110 do not interfere with each other.

The temperature control pot 110 is in the shape of a cylinder whose upper side is open, and the preform 50 is arranged inside this cylinder. The temperature control pot 110 is divided into zones, for example, in the vertical direction, and temperature control can be performed independently in each zone. As a result, the temperature of the preform 50 can be adjusted to the optimum temperature suitable for blow molding.

Inserting Process and Inserting Device The inserting process of the outer bottle 20 is started immediately after the temperature adjusting process by the temperature adjusting pot 110 is completed in the state shown in FIG. First, by driving the air cylinder 112, the temperature control pot 110 is changed from the state shown in FIG.
It is driven downward to the lower position shown in. At this time, the outer bottle 20 stands by at a position where it does not interfere with the descending path of the temperature control pot 110. In the present embodiment, as shown in FIG. 5, the temperature control pot 110 is stopped at its lower standby position, and then the outer bottle 20 is driven forward to a position immediately below the preform 50. Even if the temperature control pot 110 is moving downward, if the temperature control pot 110 is lowered to a position where it does not interfere with the forward movement path of the outer bottle 20,
The forward movement of the outer bottle 20 may be started. As shown in FIG. 5, after the outer bottle 20 is placed at a position directly below the preform 50, the outer bottle 20 is moved upward, and the outer bottle 20 is inserted into the preform 50 as shown in FIG. It

As shown in FIG. 1 (B), this insertion step is a ring-shaped formation formed between the outer wall surface of the preform 50 immediately below the neck portion 52 and the extension wall portion 94 of the neck mold 90. It is performed by inserting the flange portion 30 of the outer bottle 20 into the void 96. Flange part 30
The state after the insertion is shown in the enlarged view shown in FIG. During the process in which the flange portion 30 is inserted into the gap 96, the ball 108 protruding to face the gap 96 is pressed by the outer wall surface of the flange portion 30 and the inner side of the bottomed hole 106 of the ball plunger 102. Pushed back to. This does not hinder the upward movement of the outer bottle 20. Then, as shown in FIG. 2, the ring-shaped recess 3 formed in the outer wall of the flange portion 30.
When 2 is arranged at a position facing the ball 108 of the ball plunger 102, the ball 108 is elastically fitted into the ring-shaped recess 32, and both are engaged. At the same time, the step portion 34 formed on the inner wall side of the flange portion 30 of the outer bottle 20 has the preform 5
It contacts the lower surface of the flange portion 42b of No. 0, whereby the upward movement of the outer bottle 20 is stopped. As described above, even if the inserting process of the outer bottle 20 is completed and the support of the outer bottle 20 is released, the outer bottle 2 is engaged due to the engagement between the ball 108 and the ring-shaped recess 32 of the flange portion 30.
0 never falls.

The advantages of implementing the insert of the outer bottle 20 in the temperature control section 72 of the insert blow molding device 60 are as follows.

The molding cycle time of the insert blow molding device 60 is not increased. This molding cycle time is determined on the basis of the injection molding cycle time in the injection molding section 70 which usually takes the longest time. On the other hand, the temperature control time in the temperature control unit 72 is not required to be as long as the normal injection molding time. In particular, in the case of the hot parison method like the apparatus of this embodiment, the preform 50 retains the heat at the time of injection molding, and in this temperature control step,
Since this retained heat is adjusted to an appropriate temperature for stretching, much temperature control time is not required. Therefore, this temperature control unit 72
While the preform 50 is stopped at, there is an empty time other than the temperature adjustment time, and the outer bottle 20 can be inserted by utilizing this empty time.

In the temperature control section 72, a space for inserting the outer bottle 20 can be secured relatively easily.
Since the temperature control pot 110 is for controlling the temperature of the preform 50 whose vertical axis length is shorter than that of the bottle after blow molding, it is better than the blow cavity type (described later) arranged in the blow molding section 74. It has been considerably miniaturized. Therefore, by setting the lower stop position of the temperature control pot 110, a relatively large space can be secured between the temperature control pot 110 and the preform 50 at the lower stop position. This wide space can be used to insert the outer bottle 20. On the other hand, in the blow molding section 74, since the blow cavity mold occupies a considerable space, the outer bottle 2 is placed in the region immediately below the preform 50.
It is quite difficult to secure a space for inserting 0. On the other hand, in the injection molding section 70, since the normal molding cycle time is the longest, it is not possible to add an insert step for further prolonging the cycle time. Further, the injection device 6 is provided on the side of the injection molding unit 70.
Since there are also eight, it is not possible to position the insert device 120 itself.

Further, in this embodiment, the outer bottle 20 is inserted in the temperature adjusting section 72 after the temperature adjusting step of the preform 50 is completed. Accordingly, the temperature control process itself of the preform 50 does not cause any trouble, and the conventional temperature control pot 110 can be used as it is.

Further, in this embodiment, the neck mold 90 itself is provided with an engaging mechanism for the outer bottle 20 which is an insert member. As a result, it is not necessary to provide a complicated engaging structure in the region of the preform 50 immediately below the neck portion 52. Therefore, the preform 50 can be designed as a general simple shape, and the molding stability of the preform 50 in the injection molding section 70 can be maintained. A complicated shape is not required for the outer bottle 20 which is an insert member, and it is sufficient to form the ring-shaped recess 32 on the outer wall of the flange portion 30.

Further, while the recess 32 provided in the flange portion 30 of the outer bottle 20 is formed in a ring shape, the ball plunger 102 provided in the neck portion 90.
Are arranged at intervals in the circumferential direction.
This means that the outer bottle 20 is different from the ball 108 of the ball plunger 102 existing at a fixed position in the circumferential direction.
Means that there is no position regulation in the circumferential direction. That is, no matter how the outer bottle 20 is attached in the circumferential direction, the ball 108 of the ball plunger 102 is always fitted in any position of the ring-shaped recess 32, and the outer bottle 20 is engaged. Can be held together.

Next, the insert device 120 for inserting the outer bottle 20 will be described with reference to FIGS.
Will be described with reference to.

As shown in FIG. 6, this insert device 120 has the same number of two outer bottles 20 with respect to a plurality of, for example, two preforms 50 stopped at the temperature adjusting section 72.
Can be inserted at the same time. The insert device 120 has two pairs of chuck pieces 122 for supporting the two outer bottles 20. The pair of chuck pieces 122 are supported by the opening / closing part 124,
The opening / closing section 124 can be opened and closed as shown in FIG. The supporting structure of the outer bottle 20 is not limited to the one using the pair of chuck pieces 122, and may have a receiving member for mounting the bottom portion 24 of the outer bottle 20, for example.

The chuck piece 122 faces the two preforms 50 and supports the two outer bottles 20 in a direction parallel to the arrangement direction of the two preforms 50 (direction of arrow B in FIG. 6). are doing. A pair of chuck pieces 12
The opening / closing part 124 for supporting the respective 2 is connected to the arm 126. This arm 126 is used for the advancing / retreating drive unit 12.
8, the arm 126 is driven back and forth in the direction of arrow C in FIG. As a result, the outer bottle 20 supported by the pair of chuck pieces 122 can be moved in the horizontal direction (arrow C direction shown in FIG. 6) orthogonal to the arrangement direction (arrow B direction) of the preforms 50. . Due to the forward / backward drive in the direction of arrow C, the outer bottle 20 is held between the position retracted from the transport path of the preform 50 (route D shown in FIG. 6) and the position of the preform 50 on the transport path D. 20 can be driven back and forth.

Forward / backward drive unit 128 of the insert device 120
Is driven up and down by an up-and-down drive unit 130 including an air cylinder shown in FIG. FIG. 8 shows a state in which the advancing / retreating drive unit 128 is raised.
The zero rod 130a extends upward and reaches its upper limit position. The vertical movement of the advancing / retreating drive unit 128 is guided by the guide shaft 132. The insert device 120 configured as described above is supported on the fixed platen 134 that is fixed so as to project from the side of the base 62.

The advantages of performing the insert process using the insert device 120 having such a configuration are as follows. First, the outer bottle 20 is attached to the pair of chuck pieces 1
By moving the preform 50 in the direction of the arrow C in FIG. 6 by 22, the moving distance between the retracted position of the preform 50 retracted from the transport path D and the insert position can be set to the shortest. This is clear when compared with the prior art in which the insert members are inserted and removed on the same line as the arrangement direction (B direction) of the preforms 50. in this way,
By minimizing the horizontal movement distance for the insert,
Even if the moving speed is set to the same as the conventional one, the moving time can be shortened, and as a result, the insert process can be performed in a short time. Further, since the moving distance is the shortest, the length of the cantilever supporting the pair of chuck pieces 122 can be shortened, and the bending of the chuck piece 122 at the tip of the cantilever can be reduced. This makes it possible to accurately set the insert position of the outer bottle 20 and reduce defective inserts. Since the insert position can be set accurately in this way, it is possible to reduce the accidental contact between the outer bottle 20 which is an insert member and the preform 50. In particular, in the case of the hot parison method, the temperature of the preform 50 has a great influence on the blow molding quality. Therefore, when the outer bottle accidentally comes into contact with the preform 50, the temperature of the portion changes, and the quality of the blow molded product is changed. Will be damaged. In the present embodiment, such a problem can be solved.

Blow Molding Step The neck mold 90 holding the preform 50 and the outer bottle 20 is then conveyed to the blow molding section 74 by the rotation of the rotary disk 66 at a rotation angle of 90 °. This blow molding part 7
The blow molding process in No. 4 will be described with reference to FIG. Below the neck mold 90 carried into the blow molding section 74,
A blow cavity mold 140 including a pair of split molds 142 is provided. In addition, the outer bottle 20 of the present embodiment,
Since the bottom portion 24 has a shape that is recessed inward, the bottom mold 144 is provided. When the neck mold 90 is carried into the blow molding part 72, the pair of splitting directions 142 of the blow cavity mold 140 horizontally move so as to come close to each other, and the parting surfaces 148 of the split molds 142 are brought into close contact with each other to be clamped. It Further, the bottom mold 144 moves upward from its lower position, and the mold clamping state shown in FIG. 9 is obtained. Note that FIG. 9 shows only one split mold 142.

The cavity surface 146 of the blow cavity mold 140 has a shape that substantially matches the outer shape of the outer bottle 20. Therefore, the outer bottle 20 is arranged in a state of being close to the cavity surface 146 of the blow cavity mold 140.

Further, as shown in FIG. 9, the blow core mold 160 is clamped in the opening of the neck portion 52 of the preform 50. Through the blow air introduction hole 162 formed in the center of the blow core mold 160, the stretching rod 170
Penetrates and the tip thereof is arranged near the bottom portion 54 of the preform 50.

In the blow molding step, as is well known, blow air is introduced into the preform 50 through the blow air introduction hole 162 of the blow core mold 160, and the stretch rod 170 is driven downward along the vertical axis. This allows
The preform 50 is oriented in the longitudinal and lateral biaxial directions, and the inner bottle 40 is biaxially stretch blow molded from the preform 50. The blow molding process of this preform 50 is
Since it is performed inside the outer bottle 20, it is performed until the outer wall surface of the blow-molded inner bottle 40 comes into close contact with the inner wall surface of the outer bottle 20. During the blow molding process, the air existing between the preform 50 and the outer bottle 20 is removed by the air vent hole 28 formed in the outer bottle.
Is discharged to the outside of the outer bottle 20 via. The discharged air is, for example, the parting surface 148 of the split mold 142.
It is guided to the outside of the blow cavity mold 140 via the air bleed groove 150 formed in the. Therefore, the outer bottle 2
Blow molding of the preform 50 inside 0 can be smoothly performed.

In particular, in this embodiment, since the outer bottle 20 which is an insert member is preliminarily inserted in the temperature adjusting section 72, the insert step in the blow molding section 74 is not necessary and the blow molding time is sufficiently long. Can be secured. When the insert member is the outer bottle 20 as in this embodiment, the outer bottle 20 can be placed on the bottom mold 144 before the pair of split molds 142 are closed and driven. However, as described above, the insert in the blow molding portion 74 needs to move the outer bottle 20 along the same line as the arrangement direction of the preforms 50, which considerably increases the moving distance. Therefore, the present embodiment is superior in terms of insert position accuracy and required insert time.

Further, in the present embodiment in which the double-walled bottle 10 is formed by using the insert member as the outer container, the multilayer bottle can be formed relatively easily. That is,
In the past, this type of multilayer bottle was molded by the preform multi-layer molding technique, but this multi-layer molding technique requires considerably complicated injection control. According to this embodiment, a multilayer bottle molded of the same or different material can be molded relatively easily by using the insert process and the blow molding process.

[0081]Eject process  After the above-mentioned blow molding is completed, the turntable 66 is further rotated by the rotation angle 9
A neck that holds the double-walled bottle 10 rotated by 0 °
The mold 90 is conveyed to the eject unit 76. Neck type 90
Is a known pair of split molds.
The double-walled bottle 10 can be opened by opening the
It is disengaged from 0 and dropped downward due to its own weight.
In addition, by opening a pair of split molds, the neck mold 90 is installed.
The ball 108 of the flat ball plunger 102 is also doubled.
The wall bottle 10 is detached from the ring-shaped recess 32. Follow
In this way, it is possible to carry out this eject process without any hindrance.
it can.

Second Embodiment Next, an embodiment in which the present invention is applied to an insert blow molding method and apparatus for a bottle 180 with a handle will be described with reference to FIG.
13 to 13 will be described.

As shown in FIG. 10, the bottle 180 with a handle comprises a bottle body 190 and a handle member 200. The bottle body 190 has a neck portion 192 that opens at the upper end, a bottom portion 194 that is closed at the lower end, and a body portion 196 that connects these. A threaded portion 192a is formed on an upper portion of the neck portion 192, and a flange portion 192b is formed on a lower portion of the neck portion 192 so as to protrude radially outward in a ring shape.

On the other hand, the handle member 200 is the bottle body 19
The ring portion 210 attached immediately below the neck portion 192 of 0 and the back surface 1 of the body portion 196 of the bottle body 190.
96a and the grip part 220 arranged so as to face.
A space is formed between the back surface 196a of the body 196 and the grip 220, and a hand is inserted into the space to hold the grip 22.
By holding 0, the bottle body 190 can be handled. An engaged portion 222 is provided at the lower end of the grip portion 220, and the engaged portion 222 is the bottle body 1
90 body 196 is engaged. As a result, the handle member 200 is integrated with the bottle body 190 by engaging the ring portion 210 at the upper end and the locked portion 222 at the lower end. In addition, the ring portion 2 of the handle member 200
10 The outer wall has recesses 21 at a plurality of different positions in the circumferential direction.
2 is locally formed.

FIG. 11 shows a state in which the handle member 200 is inserted into the preform 230 for molding the bottle body 190 and is arranged in the blow cavity mold 140. Among the members shown in FIG. 11, members having the same functions as the members described in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. Figure 11
In the embodiment shown in FIG. 8 as well, the handle member 200, which is an insert member, has its ring portion 210 engaged and held at a position just below the neck portion of the preform 230 by the engagement mechanism 100 similar to that of the first embodiment. There is.

Here, in the handle member 200, the grip portion 220 needs to be arranged at a specific position in the circumferential direction with respect to the blow cavity mold 140. Blow cavity mold 1
This is because the split mold 142 of 40 is provided with a groove for accommodating and arranging the grip 220. To this end, the recess 2 formed on the outer wall of the ring portion 210 of the handle member 200
The groove 12 is not a groove which is continuous in the circumferential direction as in the first embodiment, but is locally formed at a specific position in the circumferential direction. The specific position is a position facing the ball 108 held by the ball plunger 102 of the neck 90. The grip member 200 is inserted at a position just below the neck portion of the preform 230 by an inserting step described later, and the recess 21 formed in the ring portion 210 is formed.
By engaging 2 with the ball 108 of the ball plunger 102, the grip member 200 can also be positioned in the circumferential direction.

A bottle body 190 is biaxially stretch blow-molded from the preform 230 using the blow core mold 160 and the stretch rod 170 shown in FIG. At this time, the ring portion 210 of the handle member 200 has resin that wraps around the lower surface thereof and the flange portion 1 formed on the neck portion 192.
The ring portion 210 is firmly sandwiched between the bottle body 190 and 92b. Further, the handle member 20
The resin of the body 196 of the bottle main body 190 wraps around the entire surface of the locked portion 222 formed at the lower end of the grip portion 220 of No. 0, and the locked portion 222 and the bottle main body 190 are more firmly integrated. This makes it possible to mold the bottle 180 with a handle in which the bottle body 190 and the handle member 200 are integrated.

Next, the handle member 20 which is an insert member.
0 and 0 are inserted into the preform 230 held by the neck mold 90, and the steps thereof will be described with reference to FIGS.
Will be described with reference to. Among the members shown in each drawing, the members having the same functions as those of the members of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

Also in this second embodiment, the handle member 20
The 0 insert step is performed by the temperature control unit 72 of the insert blow molding apparatus 60 shown in FIG. This temperature control unit 7
Similarly to the first embodiment, the insert step in 2 is also performed after the temperature of the preform 230 is adjusted using the temperature adjustment pot 110.

FIG. 12 shows a state in which the temperature control process of the preform 230 is completed and the temperature control pot 110 is lowered to its lower position. Further, in FIG. 12, the handle member 200
It is shown that the pair of chuck pieces 122 holding the above are moved forward to the position below the preform 230 by the arm 126 driven forward and backward by the forward / backward moving device 240. After that, the handle member 200 is moved upward by driving the advancing / retreating / elevating device 240. At this time, the ring portion 210 of the handle member 200 is attached to the preform 2 from below.
It will be inserted into 30, and will rise. Then, at the rising stop position of the handle member 200, as in the first embodiment, the recess 212 formed in the ring portion 210 and the ball 108 of the ball plunger 102 of the neck mold 90 engage with each other,
The insert process ends. As shown in FIG. 13, the second
Similar to the first embodiment, the pair of chuck pieces 122 of the embodiment are oriented in the horizontal direction (direction of arrow C shown in FIG. 13) orthogonal to the direction of arrangement of the preforms 230 (direction of arrow B shown in FIG. 13). Driven back and forth. This makes it possible to reduce the insert time and improve the insert position accuracy, as in the first embodiment.

As shown in FIG. 13, the advance / retreat device 24
A parts feeder 250 for supplying the handle member 200 is arranged adjacent to 0. The parts feeder 250 supplies the grip member 200 along a rail 252 having a curved and linear path. A material supply unit 260 is provided at the tip of the rail 252. Further, a slide unit 270 is provided below the material supply unit 260. The slide unit 270 is provided with pedestals 272 at two positions at the same pitch as the arrangement pitch of the preforms 230.
In FIG. 13, one pedestal 272 is arranged directly below the material supply unit 260.

The material supply unit 260 supplies the handle members 200 one by one to the slide unit 270 below the material supply unit 260. The slide unit 270 is slidable along the longitudinal direction by a distance corresponding to the arrangement pitch of the two pedestals 272. By this slide movement of the slide unit 270, each pedestal 272 moves to a position directly below the material supply unit 260, and the two grip members 200 can be supplied onto the slide unit 270.

The slide unit 270, to which the two handle members 200 are supplied, is as shown by the chain line in FIG.
It moves to a position between the two pairs of chuck pieces 122 and the preform 230. At this time, slide unit 2
Two pedestals 272 of 70 are stopped at a position directly facing the preform 230. On the other hand, the center positions of the two pairs of chuck pieces 122 are not positions that directly face the two preforms 230, but are arranged at positions displaced in the position direction. This is because the pair of chuck pieces 122 does not chuck the ring portion 210 of the handle member 200, but chucks the grip portion 220 located at a position deviated from the center of the ring portion 210. Gripping part 2
Since the cross section of 20 is not normally circular, the chuck shape of the pair of chuck pieces 122 is formed in conformity with the contour shape of the gripping portion 220 to engage with the ball 108 of the ball plunger 102 of the neck die 90. The grip 220 can be chucked at the correct position.

The handing of the handle member 200 from the slide unit 270 to the two pairs of chuck pieces 122 is completed before the temperature control process of the preform 230 in the temperature control section 72 is completed. This allows preform 2
Immediately after the temperature control step of 30, the insertion of the handle member 200 can be started. In this embodiment, since the moving distance of the pair of chuck pieces for inserting the handle member 200 can be set to the shortest, the following new handle member 20 is provided.
It is possible to secure a sufficient time for supplying 0 to the two pairs of chuck pieces 122. Further, by providing the parts feeder 250 adjacent to the insert device, it is possible to further shorten the supply time of this new grip member 200.

Third Embodiment This third embodiment is similar to the second embodiment in that the bottle 300 with a handle is molded by using the insert blow molding device 60, but the handle member is It differs from the second embodiment in that it is engaged with the reform itself.

The bottle 300 with a handle according to the third embodiment shown in FIG. 14 has an external shape shown in FIG. 10 according to the second embodiment.
It is almost similar to the bottle 180 with a handle shown in FIG. The bottle 300 with a handle includes a bottle body 310 and a handle member 330. The bottle body 310 has a neck portion 312, a bottom portion 314, and a body portion 316, and the shape other than the neck portion 312 is substantially the same as the bottle body 19 shown in FIG.
It is the same as 0. As shown in FIG. 10, the neck portion 312 of the bottle body 310 is not provided with the flange portion 192b that comes into contact with the ring portion of the handle member. On the other hand, the handle member 330 also has substantially the same shape as the handle member 200 shown in FIG. 10, and has a ring portion 340 and a grip portion 350.
The ring portion 340 shown in FIG. 14 is different in that the recess 212 as shown in FIG. 10 is not formed. The grip portion 350 has substantially the same shape as the grip portion 220 of FIG. 10, and has a locked portion 352 at the lower end thereof.

Next, the bottle body 310 and the handle member 330.
The engagement structure with the ring portion 340 will be described with reference to FIGS. 16 to 18. 16 is a cross-sectional view taken along the line XX of FIG. 14, and FIGS. 17 and 18 are Y of FIG.
It is a -Y sectional view and a ZZ sectional view.

When the neck portion 312 of the bottle body 310 is viewed from above, as shown in FIGS. 16 and 18, a ring-shaped protrusion 320 is formed which protrudes radially outward from the outer wall of the neck portion 312. ing. Further, radial projections 322 are formed at a plurality of locations in the circumferential direction, for example, four locations, which radially project further outward in the radial direction than the ring-shaped projection 320.

On the other hand, the ring portion 340 of the handle member 330 is provided with a first locked portion 342 which is formed in a step shape so as to come into contact with the lower surface 322a of the radial protruding portion 322. Further, locked pieces 344 extending upward with a predetermined width are provided at a plurality of locations, for example, four locations, which are not opposed to the radial protrusions 322 of the bottle body 310. The upper end of the locked piece 344 projects inward in the radial direction. This upper end protrusion is the upper surface 320 of the ring-shaped protrusion 320 formed on the neck portion 312 of the bottle body 310.
The second locked portion 346 is locked to a. Further, an annular wall portion 348 is provided on the outer edge of the upper region of the ring portion 340. A gap 349 is formed between the annular wall 348 and the locked piece 344.
As a result, the locked piece 344 can be elastically deformed in the region where the void 349 exists. Annular wall 34
No. 8 is formed continuously in the circumferential direction, although the thickness is different at each position in the circumferential direction due to the existence of the voids 349 and the radial protrusions 322. The upper end position of the annular wall portion 348 is the same as the upper end position of the locked piece 344. The annular wall portion 348 is formed as a blind for preventing the locked piece 344 from being exposed to the outside.

FIG. 15 shows a state in which the ring portion 340 of the handle member 330 is inserted into the blow cavity mold 140 at a position just below the neck portion of the preform 360 for molding the bottle body 310. ing. Handle member 330 for this preform 360
In the insert step of, the insert device shown in FIG. 12 used in the second embodiment can be used as it is. That is, the handle member 330 is inserted into the preform 360 from below. Then, the ring portion 340 is engaged with the preform 360 at a position directly below the neck portion of the preform 360 having substantially the same shape as the neck portion 312 of the bottle body 310.

This engagement process is performed as follows. When the ring portion 340 is inserted into the preform 360, the locked piece 34 is formed in the vicinity of just below the neck portion thereof.
The second locked portion 346, which is located at the upper end of 4 and protrudes inward in the radial direction, contacts the side wall of the preform 360.
At this time, the locked piece 344 can be elastically deformed so as to bulge outward in the radial direction because the void 349 exists around the locked piece 344. As a result, the upward movement of the handle member 330 is not hindered. Then, this locked piece 344
The second locked portion 346 at the upper end of the above is engaged with the upper surface 320a of the ring-shaped protrusion 320 formed on the neck portion by elastic return. On the other hand, the step-shaped second locked portion 342 formed on the ring portion 340 comes into contact with the lower surface 322a of the radial protruding portion 322 of the neck portion. By these engagements, the ring portion 3 of the handle member 330 is
The upper and lower positions of 40 are restricted, and the preform 3
60 will be engaged.

This engaged state is shown in FIG. 15, in which the ring portion 340 of the handle member 330 is engaged and held by the preform 360 itself regardless of the neck mold 90. The subsequent blow molding process is performed in the same manner as in the second embodiment,
By this blow molding process, the handle member 330 and the bottle body 310 are integrated as in the second embodiment.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the gist of the present invention. For example, the insert member to be inserted into the preform is not limited to the outer container or the handle member shown in each of the above embodiments, and the shape of the portion to be inserted into the region immediately below the neck portion of the preform is also as described above. Not limited to the ring-shaped member continuous in the circumferential direction as in each embodiment, a notched ring-shaped member may be used. In such a case, it is not necessary to insert the preform from the lower side of the preform, but just by moving it forward from the side of the preform to the area just below the neck, it is possible to insert it. You can In this case, the notch ring-shaped member can be elastically deformed and expanded by the forward movement of the insert member while being engaged with the preform. Alternatively, a part of the ring-shaped portion may be configured to be openable and closable via a hinge or the like, inserted from the side of the preform in an open state, and then driven by closing so as to be continuous in the circumferential direction. good. Further, the method of engaging and retaining the preform and the insert member is not limited to elastic deformation of the plastic material or using a spring, but the ring portion of the handle member inserted into the preform is rotated to engage. It may be one.

Although the above-described embodiments have been described by taking the so-called hot parison type insert blow molding apparatus as an example, the present invention can be applied to a cold parison type insert blow molding apparatus. In this case, the neck type is not used as the preform supporting means. Even in this case, when the engaging mechanism of the first and second embodiments is adopted,
For the neck supporting means other than the neck type, the same engaging mechanism as in the first and second embodiments can be adopted.

[0105]

According to each of the first and sixth aspects of the invention, the amount of insert movement between the retracted position and the insert position is minimized, the time required for the insert is shortened, and in addition, the insert is shaped like a cantilever. The bending of the support piece that supports the member is reduced, and highly accurate insert can be performed.

According to each of the inventions of claims 2 and 7, even when the insert member has a ring-shaped portion for being firmly integrated with the container, by performing the insert by horizontal movement and vertical movement, A highly accurate insert can be performed.

According to the third aspect of the present invention, the insert blow molding can be performed by the hot parison method by inserting the insert member into the preform held by the neck mold.

According to the fourth and ninth aspects of the present invention, the insert member can be inserted by using the temperature control unit in which the member interfering with the insert path is relatively small and has a lot of empty space.

According to the fifth aspect of the invention, it is possible to carry out the insert while preventing the interference with the insert member by utilizing the vertical movement of the temperature control pot arranged in the temperature control section as it is.

According to the eighth aspect of the present invention, the insert step can be carried out in the temperature control section after the temperature control step of the hot parison method for a relatively short time. For this reason, the temperature control step can be performed without the insert member, and by fixing both during the neck die stop time in the temperature control section, the cycle time is not adversely affected.

According to the tenth aspect of the invention, the double-walled container can be molded without using the multilayer injection molding technique of the preform which is difficult to control.

According to the eleventh aspect of the present invention, the container with the handle can be molded while shortening the insert time and improving the insert accuracy.

According to the twelfth aspect of the present invention, a new structure of a container with a handle is provided, which is easy to insert from below the preform and has a structure capable of securely temporarily fixing the handle member to the preform after the insertion. Can be provided.

According to each of the thirteenth and fourteenth aspects of the present invention, the concave-convex shape caused by the existence of the locked piece is covered with the annular wall portion, and the elastic deformation of the locked piece at the time of insertion is allowed. .

[Brief description of drawings]

FIG. 1A is a cross-sectional view showing a state in which an outer bottle inserted at a position just below a neck portion of a preform is attached and held by a neck-type engaging mechanism, and FIG.
Indicates a state where the outer bottle is not attached, (A)
It is sectional drawing which shows the cross section different from.

FIG. 2 is an enlarged view of part A of FIG.

FIG. 3 is a partially cutaway front view of the double-walled bottle molded in the first embodiment of the present invention.

FIG. 4 is a plan view of an insert blow molding device.

FIG. 5 is a partially cutaway side view showing an insert device arranged in a temperature control section of the insert blow molding device.

FIG. 6 is a plan view of the insert device shown in FIG.

FIG. 7 is a partially cutaway side view showing a temperature adjusting process in the temperature adjusting unit shown in FIG.

8 is a partially cutaway side view showing an inserted state of the outer bottle in the temperature control unit shown in FIG.

9 is a cross-sectional view showing a blow molding process in the blow molding section shown in FIG.

FIG. 10 is a side view of a bottle with a handle formed according to a second embodiment of the present invention.

FIG. 11 is a cross-sectional view showing the blow molding process of the second embodiment of the present invention.

FIG. 12 is a side view of an inserter that inserts a handle member into a preform.

13 is a plan view of the insert device shown in FIG.

FIG. 14 is a side view of a bottle with a handle formed according to a third embodiment of the present invention.

FIG. 15 is a schematic cross-sectional view showing the blow molding process of the third embodiment.

16 is a sectional view taken along line XX of FIG.

17 is a cross-sectional view taken along line YY of FIG.

18 is a sectional view taken along line ZZ of FIG.

[Explanation of symbols]

 10 Double-walled Bottle 20 Insert Member (Outer Bottle) 22 Opening 32 Ring-shaped Recess 40 Inner Bottle 50, 230, 360 Preform 52 Neck 60 Insert Blow Molding Equipment 72 Temperature Control 74 Blow Molding 90 Neck Support Means (Neck type) 94 Extended wall portion 96 Gap 100 Engaging mechanism 102 Ball plunger 106 Bottom hole 108 Ball 109 Spring 110 Temperature control pot 112 Air cylinder 120 Insert device 122 Chuck piece 126 Arm 128 Advance / retract drive unit 130 Elevation drive unit 140 Blow Cavity type 180,300 Bottle with handle 190,310 Bottle body 192,312 Neck part 200,330 Handle member 210,340 Ring part 212 Recess 220,350 Grip member 222 Locked part 240 / Lifting device 320 engaged portion of the phosphorus-like projections 322 radially protruding portion 342 first 344 locked piece 346 a second engaged portion 348 annular wall portion 349 gap portion

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location // B29K 105: 20 B29L 22:00

Claims (14)

[Claims] 1. A preform made of a plurality of resins is simultaneously conveyed to a blow molding section by a neck supporting means for supporting a neck section of the preform, and the preform is placed in a blow mold provided in the blow molding section. And an insert member, the container is blow-molded from the preform, and in the insert blow-molding device that integrates the insert member with the container by the blow molding, a plurality of members supported by the neck support means There is an insert device that inserts each of the insert members in the preform, the insert device is opposed to the plurality of preforms, and along a direction parallel to the arrangement direction of the plurality of preforms, A plurality of support pieces that support the plurality of insert members, and Along the intersecting horizontal direction, a position retracted from the conveyance path of the preform,
An insert blow molding device, comprising: an advancing / retreating drive means for advancing / retreating the plurality of support pieces between the preform and a position on the conveying path. 2. The insert member according to claim 1, wherein the insert member has a ring-shaped portion that is inserted from the bottom side of the preform and that is arranged immediately below the neck portion of the preform. , Further comprising lifting means for lifting and lowering the ring-shaped portion of the insert member between a first lower position below the preform and a position directly below the neck portion of the preform. Insert blow molding equipment. 3. The insert blow molding apparatus according to claim 1, wherein the neck support means is a neck type that defines an outer wall of the neck portion when the preform is injection-molded. 4. The temperature control unit for controlling the temperature of the preform to a blow molding temperature is provided between the preform molding unit and the blow molding unit according to claim 3, wherein the insert device includes the temperature control unit. An insert blow molding device, which is arranged so as to face the section. 5. The temperature control unit according to claim 4, wherein the temperature control pot is disposed around the preform, and the temperature control pot is provided at a second lower position that is further below the first position. And a means for moving up and down between a position surrounding the periphery of the preform, and an insert blow molding device. 6. A plurality of preforms and a plurality of insert members are arranged by neck support means in a plurality of blow cavities provided in a blow mold, and a plurality of containers are blow molded from the plurality of preforms. Then, in the insert blow molding method in which each of the insert members is integrated with each of the containers by the blow molding, an insert device is used for a plurality of the preforms stopped while being conveyed to the blow mold. A step of inserting a plurality of the insert members by, the insert step, facing the plurality of preforms in the stop position, and along the direction parallel to the arrangement direction of the plurality of preforms The same number of the insert members as the preforms are respectively supplied to the plurality of support pieces arranged in a line. And a step of transporting the plurality of support pieces respectively supporting the insert members toward the plurality of preforms in a horizontal direction orthogonal to the arrangement direction of the preforms. Insert blow molding method. 7. The preform according to claim 6, wherein in the insert step, after the horizontal conveyance, a ring-shaped portion provided in the insert member is inserted into the preform from a bottom side of the preform, Insert blow molding method, further comprising a step of ascending and conveying to a position just below the neck portion of the. 8. The process according to claim 7, wherein the preform is injection-molded by using a neck mold that also serves as the neck support means, and the preform conveyed by the neck mold is stopped at a temperature control unit. And a temperature adjusting step of adjusting the temperature of the preform to a blow molding temperature, and the insert step is performed after the temperature adjusting step is performed in the temperature adjusting section. Method. 9. The method according to claim 8, wherein in the insert step, the insertion of the insert member by the support piece is performed after the temperature control step is performed by a temperature control pot arranged around the preform. ,
The insert blow molding method, which is performed after the temperature control pot is retreated to a position where it does not interfere with the insert member supported by the support piece. 10. The insert process according to claim 7, wherein the insert member constitutes an outer layer container of the double-walled container molded in the blow molding process, Including a step of inserting the opening of the outer layer container to be the ring-shaped portion into the preform from the bottom side of the preform, and inserting the outer layer container at a peripheral position surrounding the preform, the blow molding step Is an insert blow molding method characterized in that, in the outer layer container arranged in the blow cavity, the inner layer container is biaxially stretch blow molded from the preform to mold the double wall container. 11. The insert according to claim 7, wherein the insert member is a handle member including a ring portion that serves as the ring-shaped portion and a grip portion, and the ring portion is formed of the preform. Inserting into the preform from the bottom side, including a step of inserting at a position directly below the neck portion, the blow molding step, the container body biaxially stretched and blown from the preform in the blow cavity and the An insert blow molding method, which comprises molding a container with a handle, which is integrated with a handle member. 12. A container with a handle molded by the molding method according to claim 11, wherein the container body has a projecting portion projecting outward at a position immediately below the neck portion, The ring portion of the member is arranged on the first locked portion that comes into contact with the lower surface of the protruding portion during the insertion, the locked piece that elastically deforms during the insertion, and the upper portion of the locked piece. A second locked portion that comes into contact with the upper surface of the protruding portion after elastic deformation, and a container with a handle. 13. The ring portion of the handle member according to claim 12, wherein the ring portion has an annular wall portion provided outside the locked piece with a distance from the locked piece. Container with handle. 14. The container with a handle according to claim 13, wherein the height of the annular wall portion is equal to or higher than the height of the locked piece.