JPH08169059A - Synthetic resin container with handle, container handle, and method of molding synthetic resin container with handle - Google Patents

Abstract

(57) [Summary] [Purpose] By delaying the movement stop of the meat above the preform, the movement of the meat below the preform is ensured and the thickness of the preform wrapped around the lower part of the handle is secured, and the molding quality is improved. Provided is a synthetic resin container with a handle, a handle for a container, and a method for molding a synthetic resin container with a handle that can improve the above-mentioned properties. When the handle 14 is inserted into the blow cavity mold, the tip position of the upper engaging portion 34 of the handle is positioned farther than the tip position of the lower engaging portion 36 with respect to the center axis of the preform. By performing blow molding, the synthetic resin container 10 with a handle in which the tip end position of the upper engaging portion 34 is provided farther than the tip end position of the lower engaging portion 36 with respect to the central axis 46 of the container body 12 is formed. To do.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin container with a handle in which a handle is integrally formed with a side wall of a container body made of a synthetic resin, a container handle, and a method for molding a synthetic resin container with a handle.

[0002]

2. Description of the Related Art Conventionally, a synthetic resin container with a handle of this kind has a handle concave portion formed on a side wall of a container body made of a synthetic resin so that the handle is vertically integrated with the recess. Has become.

The handle is provided with an upper engaging portion and a lower engaging portion that project inwardly of the container body near the upper and lower ends of the holding portion, and the upper engaging portion and the lower engaging portion are respectively provided. It is adapted to be engaged with the side wall of the container body.

In manufacturing such a synthetic resin container, a handle formed in advance is inserted into a blow cavity mold, and a preform is blow-molded in the blow cavity mold so that an upper engaging portion and a lower portion of the handle are formed. The handle and the container body are engaged and integrated by winding the preform around the engaging portion.

[0005]

When the preformed handle is inserted into the blow cavity mold and the preform is blow molded in the blow cavity mold as in the prior art, the upper engaging portion of the handle is The preform swells so as to cover it from above at a relatively early stage.

Therefore, the preform is brought into contact with the upper engaging portion in a thick state while maintaining the retained heat amount, and can be reliably engaged with the side wall of the container body in a thick state.

On the other hand, at the lower engaging portion of the handle, the preform swells so as to be rolled up from below at a relatively late time.

Therefore, the preform comes into contact with the lower engaging portion in a relatively thin state in which the amount of heat retained is reduced, and the preform is in a state of being thin and difficult to extend, so that the preform is securely engaged with the side wall of the container body. Is difficult to obtain, and this is a problem in molding a synthetic resin container with a handle.

Further, the distance from the central axis of the container body to the tip positions of the upper engaging portion and the lower engaging portion is the same, or the distance to the tip position of the upper engaging portion is the tip of the lower engaging portion. If it is longer than the distance to the position,
The preform will come into contact with the upper engaging portion earlier, making it difficult for the meat above the wall of the preform to move. Therefore, it is possible to spread the meat sufficiently to the lower part of the preform. As a result, there is a problem in that the preform cannot be wound into the lower engaging portion with a sufficient thickness, which causes defective molding and narrows the setting range of the molding conditions.

The present invention has been made by paying attention to the above-mentioned conventional problems, and an object thereof is to delay movement stop of the meat above the preform to ensure the movement of the meat below the preform. It is an object of the present invention to provide a synthetic resin container with a handle, a handle for a container, and a method for molding a synthetic resin container with a handle, which can secure the thickness of the preform to be rolled into the lower part of the handle and improve the molding quality.

[0011]

In order to achieve the above object, a synthetic resin container with a handle according to a first aspect of the present invention comprises a synthetic resin container main body having a side wall with a recess for gripping, and a container main body of the container main body. A handle arranged in the recess along the vertical direction,
In the synthetic resin container with a handle, wherein the handle has an upper engaging portion and a lower engaging portion that respectively protrude toward the inside of the container body near the upper and lower end portions thereof and that engages with the container body, The upper engagement portion has a tip position with respect to the central axis of the container body, as compared with the tip position of the lower engagement portion.
It is characterized by being installed in the distance.

A container handle according to a second aspect of the present invention is a container handle which is vertically arranged on a side wall of a container body made of synthetic resin, and a finger is inserted between the container handle and the side wall of the container body. A gripping part disposed with a space for storing the gripping part, and an upper engaging part and a lower engaging part that respectively project from the vicinity of both ends of the gripping part in substantially the same direction and engage with the side wall of the container body. The upper engaging portion is characterized in that the length to the tip is shorter than that of the lower engaging portion.

According to a third aspect of the present invention, there is provided a method of molding a synthetic resin container with a handle, in which a handle having a top engaging portion and a bottom engaging portion for engaging with side walls of the container body is formed near both ends of the handle. In a method of molding a synthetic resin container with a handle, which is inserted into a cavity mold, and a handle and a container body are engaged and integrated by blow molding a preform in the blow cavity mold, when the handle is inserted, The handle is positioned in the blow cavity mold by making the tip position of the upper engaging portion farther from the outer surface of the side wall of the preform than the tip position of the lower engaging portion.

[0014]

In the first aspect of the present invention having the above-described structure, the tip of the upper engaging portion of the handle is provided farther from the tip of the lower engaging portion with respect to the center axis of the container body. It is possible to obtain a reliable engagement state in which the thickness of the container body side wall with respect to the engagement portion is secured, and also a reliable engagement state with the thickness of the container body side wall with respect to the lower engagement portion secured.

According to the second aspect of the present invention, the upper engaging portion of the handle is formed to have a shorter length to the tip than the lower engaging portion, so that the tip position of the upper engaging portion is located at the central axis of the container body. On the other hand, it is possible to easily obtain a synthetic resin container with a handle that is provided farther than the tip position of the lower engaging portion.

According to the third aspect of the invention, when the handle is inserted into the blow cavity mold, the tip position of the upper engaging portion is more than the tip position of the lower engaging portion with respect to the outer surface of the side wall of the preform. By positioning the handle at a distance,
The timing at which the upper side wall portion of the preform comes into contact with the upper engaging portion can be delayed by the amount by which the tip of the upper engaging portion is separated from the preform, and the meat of the upper side wall portion of the preform is moved downward accordingly. Therefore, the wall thickness of the lower part of the side wall of the preform can be secured, and the lower part of the side wall of the preform can be reliably rolled up into the lower engaging part of the handle, and the molding quality can be improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the drawings.

1 to 3 are views showing a synthetic resin container with a handle according to an embodiment of the present invention.

The synthetic resin container 10 with a handle comprises a container body 12 and a handle 14.

The container body 12 is formed by blow molding using a synthetic resin such as polyethylene terephthalate (PET) to have a shape of a container for filling contents such as drinking water. Neck part 1 including
6, a shoulder portion 18 that extends downward from the neck portion 16 and continues downward, a side wall 20 that forms a trunk portion that extends downward from the shoulder portion 18, a heel portion 22 and a heel portion that decrease in diameter from the side wall 20 and continue downward 22 is composed of a bottom portion 24 continuously located at the lower end of the container, and the bottom portion 24 has an upper bottom shape in which a convex portion 26 protruding from the outer periphery to the center toward the inside of the container is formed, and has a self-supporting property. It is designed to be used.

Further, the upper side wall 28 constituting the upper half of the side wall 20 has a holding recess 30 formed in a part of the upper side wall 28 in the circumferential direction and over substantially the entire vertical direction. .

The handle 14 is provided in the recess 30 of the container body 12,
The grip portion 32 is arranged along the vertical direction.
And an upper engaging portion 34 and a lower engaging portion 36.

The grip portion 32 is for gripping with a hand, and a space for inserting fingers is formed between the grip portion 32 and a recess 30 formed in the upper side wall 28 of the container body 12 and extends substantially vertically. It is designed to be installed. It should be noted that holes 38 for holding and positioning at the time of insertion into the blow cavity mold are formed near both ends of the grip portion 32.

The upper engaging portion 34 and the lower engaging portion 36 project from the vicinity of both ends (upper and lower ends) of the grip portion 32 toward the inside of the container body 12 in substantially the same direction, and the upper side wall of the container body 12 is covered. The upper and lower portions of the concave portion 30 formed in 28 are engaged with each other.

Further, the upper engaging portion 34 has a length l ₁ from the surface 40 facing the concave portion 30 of the grip portion 32 to the protruding tip 42.
The lower engaging portion 36 is set to have a length l ₂ from the facing surface 40 of the grip portion 32 to the protruding tip 44, and the length l ₁ of the upper engaging portion 34 is set to the lower engaging portion. It is formed shorter than the length l _{2 of} 36.

In the synthetic resin container 10 with a handle having such a handle 14 in the recess 30 formed on the upper side wall 28 of the container body 12, the central axis 46 of the container body 12 to the upper engaging portion 34 of the handle 14 is used. Distance L ₁ to the protruding tip 42
Is set to the lower engaging portion 36 from the central shaft 46.
Is set to the distance L ₂ up to the protruding tip 44, and the distance L ₁ on the upper engaging portion 34 side is shorter than the distance L ₂ on the lower engaging portion 36 side.

Accordingly, the position of the projecting tip 42 of the upper engaging portion 34 is located farther from the central axis 46 of the container body 12 than the position of the projecting tip 44 of the lower engaging portion 36.

Then, in such a synthetic resin container 10 with a handle, the container body 1 with respect to the upper engaging portion 34 is
A reliable engagement state in which the thickness of the upper portion of the concave portion 30 of 2 is secured is obtained, and the container body 1 with respect to the lower engagement portion 36 is obtained.
The reliable engagement state in which the wall thickness of the lower portion of the second recess 30 is ensured is of good quality.

Next, a method of molding the synthetic resin container 10 with the handle will be described with reference to FIGS.

First, as shown in FIG. 4, a bottomed cylindrical preform 54 in which the neck portion 16 is held by a neck mold 50.
Is inserted into the blow cavity mold 56, and the blow cavity mold 56 is clamped.

The preform 54 is formed by injection molding, and the temperature is adjusted to a temperature suitable for blow molding while maintaining the heat quantity at the time of injection molding, or after the injection molding, the temperature is once cooled to room temperature and then blown. It is designed to be inserted into the blow cavity mold 56 while being heated to an appropriate molding temperature.

When the blow cavity mold 56 is clamped, the handle 14 is inserted into the blow cavity mold 56.

The handle 14 is formed in advance by injection molding with the upper engaging portion 34 and the lower engaging portion 36 projecting from the vicinity of both ends of the holding portion 32.
Holding / positioning holes 38 formed in the vicinity of both ends of the
A positioning pin is inserted for holding and positioning, and the upper engaging portion 34 and the lower engaging portion 36 have the blow cavity mold 5
6 is exposed from the cavity surface 58.

Cavity surface 5 of blow cavity mold 56
8 has a shape corresponding to the shape of the container body 12, and a projecting surface 60 projecting inward is formed at a portion corresponding to the recess 30 of the upper side wall 28 of the container body 12. The handle 14 is inserted in the corresponding portion. A bottom mold 62 for forming the convex portion 26 of the container body 12 is provided below the blow cavity mold 56.

Further, when the handle 14 is inserted into the blow cavity mold 56, the distance L ₃ is set from the outer surface 64 of the side wall of the preform 54 to the position of the protruding tip 42 of the upper engaging portion 34 of the handle 14. The distance L ₄ is set from the outer surface 64 of the side wall to the position of the protruding tip 44 of the lower engaging portion 36, and the distance L ₃ on the upper engaging portion 34 side is set to the lower engaging portion 36.
It is set larger than the side distance L ₄ . For example, the distance L ₃ on the upper engaging portion 34 side is 20.0 mm, and the lower engaging portion 3
The distance L ₄ on the 6 side is set to 17.5 mm, and the difference L ₄ −L ₃ =
It is set to 2.5 mm.

Therefore, the outer surface 6 of the side wall of the preform 54 is
4, the position of the projecting tip 42 of the upper engaging portion 34 is set farther than the position of the projecting tip 44 of the lower engaging portion 36.
Is positioned in the blow cavity mold 56.

Next, from the state shown in FIGS. 4 and 5, as shown in FIG. 6, a blow core die 66 is inserted into the neck die 50, and the blow core die 66 is passed through to extend the rod 68.
Is inserted into the preform 54, and the extension rod 68 is lowered to extend the preform 54 in the vertical axis direction, and blow air is introduced into the preform 54 from the blow core mold 66 to move the preform 54 in the horizontal axis direction. Blow molding is carried out by stretching.

In this case, blow air is introduced from the blow core mold 66 at the same time as or after the lowering of the draw rod 68 to draw the preform 54. At this time, the upper portion of the preform 54 precedes downward. And swells in the lateral direction, and the preform 54 holds the handle 14 as shown in FIG.
The upper engaging portion 34 comes into contact with and is engaged with the upper engaging portion 34 at a relatively early time so as to cover the upper engaging portion 34 from above.

Therefore, the upper engaging portion of the handle surely engages with the thick preform, and the upper engaging portion 34 of the container body 12 is engaged.
It is possible to secure a sufficient thickness in the engagement portion with and to obtain a reliable engagement state.

On the other hand, in the lower engaging portion 36,
At a relatively late time, the preform 54 swells so as to be rolled up from below and comes into contact with and engages with each other. Therefore, the amount of heat retained in the preform 54 is smaller than that in the case of the upper engaging portion 34, and the state becomes relatively thin, but the position of the protruding tip 42 of the upper engaging portion 34 is outside the side wall of the preform 54. With respect to the surface 64, the protruding tip 44 of the lower engaging portion 36
Because it is set farther than the position, the preform 54
The timing at which the upper side wall portion of the preform 54 contacts the upper engaging portion 34 can be delayed by the amount by which the protruding tip 42 of the upper engaging portion 34 is separated from the preform 54. It can be moved downward, the thickness of the lower side wall portion of the preform 54 is ensured, and the lower side wall portion of the preform 54 is securely held.
The lower engaging portion 36 can be rolled up.

From this state, as shown in FIG.
A synthetic resin container with a handle in which the preform 54 is completely brought into close contact with the cavity surface 58 of the blow cavity mold 56 to give a shape, and then the preform 54 is taken out from the blow cavity mold 56 so that a reliable engagement state of the handle 14 is obtained. 10
Will be obtained.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention.

For example, in the above embodiment, the container handle in which the upper engaging portion is formed to have a shorter length to the tip than the lower engaging portion is used. However, the present invention is not limited to this example and the upper engaging portion is used. Even if the mating part and the lower engaging part have the same length or the lower engaging part is short, the tip position of the upper engaging part is set to the tip of the lower engaging part with respect to the outer surface of the side wall of the preform when the handle is inserted. The object of the present invention can be achieved if the handle is positioned in the blow cavity mold farther than the position.

Before the blow molding process, a part or the whole of the side wall of the preform which comes into contact with the upper engaging portion and the lower engaging portion of the handle as a result of the blow molding is lower than other regions. By locally controlling the temperature, the thickness of the part that engages with the upper and lower engaging parts of the container body is secured, the engagement state is made firm, and the upper engaging Even when the resin is stretched along the shapes of the lower portion and the lower engaging portion, it is possible to prevent the container body from rupturing due to the thin wall and the container body from rupturing due to the small amount of heat retained.

[0045]

As described above, according to the first aspect of the invention, the tip position of the upper engaging portion of the handle is provided farther from the center axis of the container body than the tip position of the lower engaging portion. As a result, it is possible to obtain a reliable engagement state in which the thickness of the container main body side wall with respect to the upper engagement portion is secured, and also a reliable engagement state with the thickness of the container main body side wall with respect to the lower engagement portion is secured. effective. . According to the second invention,
By forming the upper engaging portion of the handle to have a shorter length from the lower engaging portion to the distal end, the distal end position of the upper engaging portion with respect to the central axis of the container main body than the distal end position of the lower engaging portion. There is an effect that a synthetic resin container with a handle provided at a distance can be easily obtained.

According to the third invention, when the handle is inserted into the blow cavity mold, the tip position of the upper engaging portion is farther from the outer surface of the side wall of the preform than the tip position of the lower engaging portion. And position the handle,
The timing at which the upper side wall portion of the preform comes into contact with the upper engaging portion can be delayed by the amount by which the tip of the upper engaging portion is separated from the preform, and the meat of the upper side wall portion of the preform is moved downward accordingly. The thickness of the lower part of the side wall of the preform can be ensured, and the lower part of the side wall of the preform can be reliably rolled up in the lower engaging part of the handle, and the molding quality can be improved. There is.

[0047]

[Brief description of drawings]

FIG. 1 is a front view showing a synthetic resin container with a handle according to an embodiment of the present invention.

FIG. 2 is a side view of the synthetic resin container with a handle shown in FIG. 1 viewed from the handle side.

FIG. 3 is an enlarged cross-sectional view showing a handle mounting portion of the synthetic resin container with a handle shown in FIGS. 1 and 2.

FIG. 4 is a cross-sectional view showing a state in which a handle is inserted into a blow cavity mold and a preform is arranged in a method for molding a synthetic resin container with a handle according to an embodiment of the present invention.

5 is an enlarged sectional view of the handle and the preform in FIG.

FIG. 6 is a cross-sectional view showing a state in which the preform is being blow-molded from the states shown in FIGS. 4 and 5;

FIG. 7 is a cross-sectional view showing a state of completely blow-molded into a container shape from the state of FIG.

[Explanation of symbols]

10 Synthetic Resin Container with Handle 12 Container Main Body 14 Handle 20 Side Wall 28 Upper Side Wall 30 Recessed Part 32 Grip Part 34 Upper Engagement Part 36 Lower Engagement Part 42 Projection Tip 44 Projection Tip 46 Center Shaft 54 Preform 56 Blow Cavity Type 64 Sidewall Outer surface l ₁ Length of upper engaging part l ₂ Length of lower engaging part L ₁ Distance to tip of upper engaging part L ₂ Distance to tip of lower engaging part L ₃ Preform sidewall outer surface to upper part Distance to tip of mating part L ₄ Distance from outer surface of preform side wall to tip of lower engaging part

Claims (3)

[Claims] 1. A synthetic resin container with a handle, comprising: a synthetic resin container main body having a concave portion for gripping on a side wall; and a handle arranged in the concave portion of the container main body along a vertical direction, wherein: The handle has an upper engaging portion and a lower engaging portion that respectively project toward the inside of the container body near the upper and lower ends thereof and engage with the container body, and the upper engaging portion is the central axis of the container body. On the other hand, the synthetic resin container with the handle is characterized in that its tip position is provided farther than the tip position of the lower engaging portion. 2. A container handle arranged along a vertical direction on a side wall of a container body made of synthetic resin, wherein a space for inserting fingers is arranged between the side wall of the container body and the handle. A gripping part, and an upper engaging part and a lower engaging part that respectively project from the vicinity of both ends of the gripping part in substantially the same direction and that engages with the side wall of the container body. A handle for a container, characterized in that the length to the tip is shorter than that of the lower engaging portion. 3. A handle having projecting upper and lower engaging portions that engage with side walls of a container body near both ends is inserted into a blow cavity mold, and a preform is formed in the blow cavity mold. In a method of molding a synthetic resin container with a handle, in which a handle and a container main body are engaged and integrated by blow molding, a tip position of the upper engaging portion is set to an outer surface of a side wall of a preform when the handle is inserted. On the other hand, a method of molding a synthetic resin container with a handle, characterized in that the handle is positioned in the blow cavity mold at a position farther than the tip position of the lower engaging portion.