JPH0771810B2 - Injection molding method and apparatus thereof - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding method and an apparatus for insert molding a plug and the like constituting a power cord.

[0002]

BACKGROUND ART An injection molding apparatus is composed of an injection molding main body and a mold assembly connected to the front of the injection molding main body.

The injection molding main body is provided with a hopper for introducing a plastic resin near the rear end, and a cylinder provided with a heating device in the peripheral portion is arranged. The cylinder is rotated by a driving device composed of a motor and a speed reducer. In addition, a screw that moves forward and backward in the cylinder is built in by a hydraulic cylinder arranged at the rear part of the cylinder. The cylinder head located on the front side of the cylinder is provided with a chamber for temporarily accumulating the molten resin, and a predetermined amount of the molten resin pooled in the chamber is injected from the cylinder head by rotating the screw forward.

The mold assembly unit includes a mold fixing plate provided on a base of the injection molding apparatus, and an opening / closing unit for opening and closing the mold fixing plate.
A mold and the like are fixed to a mold fixing plate, and the molten resin injected from the cylinder head is filled in the cavity of the mold that has been clamped to mold a molded body.

The above-mentioned injection molding apparatus forms the basis of its construction, and has several auxiliary members in addition to the members described above.

As a conventional injection molding machine, for example, a molding machine having no insert member is disclosed in Japanese Patent Laid-Open No. 4-163.
No. 012 (Japanese Patent Application No. 2-286761), which has an insert member in a molded body is disclosed in Japanese Patent Laid-Open No.
253583 (Japanese Patent Application No. 1-758103).

The injection molding apparatus of Japanese Patent Laid-Open No. 163012/1989 is to mold a molded body by filling a resin into upper and lower molds having a plurality of cavities, and to mold the resin injected from a cylinder head into each cavity of the mold. The nozzle has a plurality of nozzles connected to and branched, and one of the nozzles is opened to fill the cavity. After that, the nozzle is closed, the other nozzle is opened, and the resin is filled in the other cavity in the same manner. Repeat this for all keys
A cavity is filled with resin to form a molded body.

On the other hand, the injection molding apparatus disclosed in Japanese Patent Laid-Open No. 2-253583 has a molding frame used for injection molding a plug and a connector at both ends of the power cord.

This injection molding apparatus has a cylinder head, a pair of molds, and a substantially square-shaped molding frame (hereinafter, referred to as a frame) for holding an insert member as a main part, and the tip of the cylinder head is hemispherical. Is formed in. The mold has a sprue with which the cylinder head abuts, a groove for fitting the insert member holding part of the frame and a recess for fitting the cord holding part, and has a mold runner and a cavity runner following the sprue. . In the insert member holding part of the frame,
A substantially convex (corrugated or mountainous) runner that connects the mold runner and the cavity runner of the mold is formed, and a hole is formed in this convex runner by mold clamping.

In order to mold a molded body with the above apparatus, the insert member is held by the frame body, placed at a predetermined position in the cavity of the mold, and the frame body is fitted into the mold by mold clamping. After that, the resin injected from the cylinder head is filled into the cavity through the mold sprue, the mold runner, the convex runner of the frame, and the cavity runner to mold the resin.

[0011]

However, the above-mentioned conventional injection molding apparatus has the following problems. 1. Regarding Japanese Patent Laid-Open No. Hei 4-163012 (1) Since the nozzle is incorporated in the mold and it is dedicated by one type of molded body, it is not possible to deal with various kinds of products and the mold becomes expensive. (2) Since a plurality of nozzles are sequentially opened and closed and filled with resin for molding, working efficiency is poor and productivity is poor as a multi-cavity mold. (3) Since the molding cycle is long, the resin of the closed nozzle easily hardens due to the temperature decrease, and the molding becomes unstable and the quality of the molded body deteriorates.

2. Regarding JP-A-253583 (1) The runner is provided on the surface of the insert member holding portion of the frame body in a convex shape (wavy shape or mountain shape), and further, plural (two or more) runners are formed. In this case, since the surface of the holding portion must branch, the runner portion becomes long and the runner loss (material loss) increases. (2) Since the runner is long and the frame body is convex (wavy or mountainous), the runner bends several times.
Therefore, the injection pressure is attenuated, the molding conditions become unstable, and molding defects (weld, beard, short circuit) are likely to occur. (3) Since the fitting surface of the mold and the frame has a runner, variations in fitting easily cause burrs. (4) If the mating surface is made dense in order to prevent burrs, high processing accuracy is required, and a multi-cavity mold becomes expensive.

Therefore, the present invention has the following objects. (1) Instead of sequentially opening and closing the nozzles incorporated in the mold to perform molding, molding is performed once to improve workability and productivity. (2) The nozzle inside the mold should be placed outside the mold to simplify the mold structure. (3) Shorten the runner length to reduce the runner loss. (4) Make the runner as straight as possible to stabilize the injection pressure and molding conditions. (5) Improve the fit between the mold and the frame, prevent burrs from occurring, and prevent damage to the mold and frame due to mold clamping.

[0014]

In order to achieve the above-mentioned object, the present invention branches a molding resin injected from a nozzle of an injection molding machine through a branching nozzle and clamps the branched molding resin. Another object of the present invention is to provide an injection molding method in which a plurality of cavities of a molding die are filled to mold a plurality of molded bodies.

Further, in order to achieve the above object, the present invention provides:
In an injection molding device that fills a molding die with a molding resin injected from a nozzle of an injection molding machine to form a molded body, a branch nozzle is provided between the nozzle and the molding die, and the branching nozzle is used to form the molding resin. The present invention provides an injection molding apparatus including an injection hole to be injected, a branch portion that branches the injection hole into a plurality of portions, and a plurality of inflow holes that allow the molding resin of the branch portion to flow into a plurality of runners of a mold.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The injection molding method and apparatus of the present invention will be described in detail below with reference to the accompanying drawings.

1 and 2 show an injection molding machine. This injection molding machine includes a molding machine main body 32, a molding machine main body 32, and
An upper die mounting portion 35 for mounting upper and lower dies, a lower die mounting portion 36,
A slide cylinder 34 for sliding the molding machine main body to press the injection nozzle 33 against the branch nozzle 100 is provided, a screw 37 for melting and sending the molding resin inside the molding machine main body 32, and a molten resin injection at the tip. The injection nozzle 33 is provided. In addition, although not shown, a heater for melting the resin, a controller for controlling the heater, a mold opening / closing mechanism, a metering mechanism, a cooling mechanism and an automatic control circuit for appropriately controlling the above-mentioned mechanisms are provided.

The mold comprises an upper mold 41 and a lower mold 42, and the frame body 20 is sandwiched between the molds 41 and 42 for molding. As will be described later, the molds 41 and 42 have frame engaging grooves 45A, 45B, 45C and 45D that engage with the frame body 20 and tapered surfaces 46, and a plurality of power sources set in the frame body 20. Cavities 44A and 44B having a predetermined molding shape are formed at positions corresponding to the cords 10, and runners 47 (described later) communicating with the cavities 44A and 44B are provided. The frame body feed rail 4 in which the frame body 20 is moved up and down in the lower die mounting portion 36 to be set in or removed from the lower die 42.
3A and 43B are incorporated.

FIGS. 3A and 3B show the branch nozzle 100. The branch nozzle 100 includes a pair of divided bodies 101 and 102.
And a sprue 103 with which the injection nozzle 33 contacts the injection nozzle 33 side of the molding machine.
Two nozzles 104 are provided on the die side, and the tip of the nozzle is a tip tapered surface 105 (FIG. 2) corresponding to the taper surface 27 of the terminal holding portion 21 of the frame body 20. Branch nozzle 1
Reference numeral 00 denotes the injection hole 106 and branch flow paths 107 and 108 that are symmetrically branched from the middle of the injection hole with a predetermined gradient with respect to the axial direction.
110 has a resin flow path, and its tip is narrowed into a thin taper shape, and the inflow holes 111A, 111A of the nozzle 104 are provided.
It becomes B. Inlet 111A, a pitch of 111B when heated to average setting temperature by a heater 112, 113 built into the branch nozzles 100, matching la <br/> runner -2 3 between the pitch of the frame body 20 to be described later dimensions Is processed into. The heaters 112 and 113 are temperature-controlled and maintained at a predetermined temperature.

[0020] in FIG. 4 (a) shows the frame body 20 in a state of being set in the mold 42. The frame body 20 is formed by forming a terminal holding portion 21 that holds the terminals of the plurality of power cords 10 and a cord holding portion 22 that holds the cords in a rectangular frame so as to face each other. By having insertion holes that match the shape of the above, a plurality of terminal holders 24 for inserting and holding the terminals 24A, a straight runner 23 for injecting resin, and a taper for closely fitting and holding the positioning in the mold The cord holders 25, 26 each having the surface 27 and for positioning the plurality of cords 10 in the cord holding portion 22.
Equipped with multiple power cords 10 and upper and lower molds 4
It fits between 1 and 42, and arranges in a predetermined position in a cavity.

The branch nozzle 100 shown in FIG. 3 is connected to a molding machine having an injection capacity of 2 to 3.5 ounces, and the branch nozzle 100 shown in FIGS.
When molding the EURO plug shown in FIG. 4, the inner diameter of the injection hole 106 is 8 mm, the inner diameters of the branch channels 107 and 108 are 6 to 7 mm, and the gradient of the branch channels 107 and 108 is 1.
5 degrees, the inner diameter of the inflow holes 111A, 111B is 2.5 mm,
The inner diameter of the runner 23 of the frame body 20 was a 3.5 mm taper hole.

Referring again to FIG. 3, protrusions 114 and 115 are provided on both sides of the branch nozzle 100, and the holes 1 are formed in the protrusions.
16 and 117 are formed, and elastic bodies 66A and 66B are interposed in the holes to be slidably held by the receiving bases 61A and 61B and fixed to the mounting base 64. The heat of the branch nozzle 100 slides on the slide surface of the branch nozzle 100,
Insulation materials 62A ₁ , 62A ₂ , 6 to prevent transmission to 61B
And a _{2A 3, 62B 1, 62B 2} , 62B 3.
One end of each of the elastic bodies 66A and 66B has a hole 1 of the branch nozzle 100.
16, 117, the other end is located on one side of the pedestals 61A, 61B, and acts so that the branch nozzle 100 is always in contact with the tip of the injection nozzle 33.

In the above embodiment, the sprue 103 is not necessary to mount the mounting base 64 on the mold part, but the branch nozzle 100 is biased by the elastic members 66A and 66B.
Is set in contact with the injection nozzle 33, and the nozzle portion 104 of the branch nozzle 100 is set in the mold by the slide of the injection nozzle 33. The tapered surface 27 of the frame body 20.
It may be attached to the molding machine base 31 as long as it can be brought into contact with the molding machine base 31. Further, when the molding machine 32 slides forward, the injection nozzle 33 can be omitted by setting the nozzle portion 104 of the branch nozzle 100 to a position where it can abut the tapered surface 27 of the frame body 20 set in the mold. Is also good. An example of this is shown in FIG.
Shown in (a) and (b). In this example, the branch nozzle 100 is directly fastened to the tip of the molding machine main body 32 with a screw 32A. The branch nozzle 100 has inflow holes 111A and 111B, and also has a frame body 20 having two runners 23 in the same manner.
Applied to.

6A and 6B show three inflow holes 111A,
The branch nozzle 100 having 111B and 111C is directly attached to the front end of the molding machine main body 32 without using an injection nozzle. The mounting base 6 described with reference to FIGS.
4, it can be easily understood that it may be mounted between the injection nozzle 33 and the molds 41, 42 by the pedestals 61A, 61B and the like. A branch nozzle 100 having three inflow holes 111A, 111B, and 111C is formed by combining and fixing a pair of divided bodies 101 and 102.
From the middle of both 7, 108, a branch path 121 of a substantially T-shape,
122 and two T-shaped branches formed with a Y-shape
A Y-shaped merging portion 123 is provided, and the straight-moving portion 12 is provided at the tip thereof.
Form 4 and squeeze the tip into a tapered shape,
An inflow hole 111 C is formed in the nozzle 104. With this branch structure, the same injection amount as that of the inflow holes 111A and 111B can be obtained, and the three-branch nozzle 100 with a balanced injection amount can be obtained.

The three-branch nozzle 100 shown in FIG. 6 is used with an injection machine having an injection capacity of 2 to 3.5 ounces.
When molding the EURO plug shown in FIG. 4, the injection hole 106, the branch flow paths 107 and 108, and the branch flow path 10 are formed.
Gradient of 7,108, the flow-in hole 111A, 111B, 111
C, the runner 23 and the like of the frame body 20 are the same as those of the two branches, but the inner diameters of the T-shaped branch passages 121 and 122 are 5 mm, and the angle of the Y-shaped joining portion 123 is 70 degrees. Further, the heater applied to the two-branch nozzle is also installed internally. From the above, 4, 5, 6 branches and the like can be formed as required by combining the 2-branch and 3-branch nozzles, and the injection amounts of these inflow holes can be made the same.

The molding operation for molding the power plug on the power cord will be described below. (1) Setting the power cord 10 with the plug terminal 24A on the frame body 20 The set of the power cord 10 having the plug terminal 24A is
It is carried out on one side of the injection molding machine, and the removal is carried out on the other side. Figure 4 (b) shows a state located on the lower mold 42 are already set, to insert the plug pin 24A into the insertion hole of the terminal holder 24, the code holder 25 and 26 power cord 10 Hold it and finish the set. This set and removal after completion of molding are described in detail in "Molding frame of power cord" filed on September 18, 1992 by the same applicant.

(2) Mold clamping frame 20 is set on vertically movable frame feed rails 43A, 43B incorporated in lower mold 42, and the frame of lower mold 42 is lowered by lowering frame feed rails 43A, 43B. Engagement groove 45
B, set to 45D. Next, the frame engaging grooves 45A, 4
The upper mold 41 having 5C is clamped, and the frame body 20 is held between the upper and lower molds 41 and 42. When this mold is clamped, the upper mold 41
The tapered surface 46 provided in the frame engaging groove 45A and the tapered surface 27 of the frame body 20 are brought into contact with each other to position the frame body 20 in the molds 41 and 42, and the two tapered contact surfaces 27,
And 46, an inner surface and two sides of the mold surface (entrance surface of the runner 2 3 terminal holding portion 21, and the outlet surface) of the terminal holding portion 21 of the frame 20 is closely fitted.

(3) Injection nozzle 33, branch nozzle 100,
When the contact between the molds 41 and 42 is completed, the injection molding machine main body 32 advances by the slide cylinder 34, the injection nozzle 33 presses the sprue 103 of the branch nozzle 100, and the elastic bodies 66A and 66 are formed.
The branch nozzle 100 is slid against B, the tip tapered surface 105 of the branch nozzle 100 comes into contact with the tapered surface 27 of the frame body 20 set in the molds 41 and 42, and a force is applied upward due to the taper angle. It acts and presses the back surface of the tapered surface 105 of the branch nozzle 100 and the engagement surface of the upper mold 41, and the branch nozzle 1 is formed by these both surfaces (taper surface and back surface).
00 is positioned and held. Thereby, the branch nozzle 1
The plurality of nozzles 104 of 00 directly contact the frame body 20 without contacting the molds 41 and 42. The branch nozzle 100 is
The heaters 112 and 113 control the resin to a predetermined temperature in order to keep the resin in a molten state. Therefore, the inflow hole 111
The pitch dimension between A and 111B varies due to thermal expansion, and a slight error occurs from the pitch dimension between the runners 23 of the frame body 20 (varies depending on the difference in set temperature). However, since the tapered surface 27 of the frame body 20 and the tapered surface 105 of the nozzle tip are flat tapered surfaces, they come into close contact with each other completely, and are smaller than the hole diameter of the small diameter side (resin injection side) of the runner 23.
By setting the hole diameters of the inflow holes 111A and 111B to be small, there is no trouble such as resin leakage even if the difference or pitch dimension changes, and there is no hindrance to the resin flow. In the case of a hemispherical shape like a conventional nozzle tip shape, a plurality of nozzles 10
4 and the inflow holes 111A and 111B, if there is a difference in pitch dimension, the two do not come into close contact with each other and a trouble such as resin leakage occurs.

(4) Molding When the nozzle portion 104 is completely in contact with the frame body 20, the screw 37 advances, and a predetermined amount of molten resin is injected from the injection nozzle 33 into the branch nozzle 100 by the measuring mechanism of the molding machine. by branch channel 107 through the injection hole 106 is branched into equal amount, the inflow hole 111A of the nozzle 104 via the straight portions 109 and 110, is injected from 111B runner 23 of the frame body 20. The molten resin injected into the runner 23 is injected into the cavities 44A and 44B through the runners 47 of the molds 41 and 42, and the power plug is injection-molded. During this injection, the injected resin is the branch nozzle 10
0 branch flow paths 107 and 108 and cavities 44A and 44
All are straight lines except that the runner 47 connected to B changes the injection direction. Further, in the case of multi-cavity molding, the mold runner 47 is injected into the cavities 44A and 44B on both sides, so that in the case of the two-branch nozzle of the embodiment, two runners are provided in the molds 41 and 42. A four-cavity cavity is constructed. Similarly, for a 3-branch nozzle, 6
In the case of individual cavities and four branches, the mold has eight cavities. When the injection pressure holding time (set time) has elapsed,
The screw 37 retreats while rotating, the measuring mechanism for melting a predetermined amount of resin operates, and the slide cylinder 34 operates when the measuring is completed, and the molding machine body 32 retracts. At the time of this retreat, the branch nozzle 100 is released from the pressure from the injection nozzle 33, is separated from the frame body 20, and is elastic body 66A, 66.
Due to B, the sprue 103 and the injection nozzle 33 do not separate and move backward simultaneously. For the contact between the sprue 103 and the injection nozzle 33, the stop position is preset by the limit switch 38 so that the branch nozzle 100 hits the slide ends of the pedestals 61A and 61B and the injection nozzle 33 and the sprue 103 do not separate. I'll do it.

(5) Mold Opening (Removal) On the other hand, the cooling started simultaneously with the start of weighing of the molding machine, the power plug molded in the mold for a predetermined time is cooled and solidified by the cooling set time of the cooling mechanism, and the molding machine Upon completion of the retreat of the main body 32 and the cooling time-out, the upper mold 41 is raised by the mold opening mechanism. When the upper die 41 rises, the molding ejector mechanism operates, the frame feed rails 43A and 43B rise, and the frame body 20 separates from the lower die 42. When the molds are opened in this way, the frame body 20 moves to the frame feed rails 43A,
43B, a power cord 10 having a plurality of molding plugs, which is sent from the top of the frame 43B, and has a plurality of molding plugs from the frame 20 by a take-out device (not shown).
Is removed.

In the above embodiment, the frame 20 is used, the cord 10 having the plug terminal 24A is set therein, and the branch nozzle 100 is mounted between the injection nozzle 33 and the molds 41 and 42. When molding a molded body having no (power cord), the use of the frame 20 may be stopped and the tip of the branch nozzle 100 may be directly brought into contact with the mold, and the branch nozzle 100 may be directly attached to the tip of the injection cylinder. In the case, the mounting base 64 provided on the mold part and the receiving bases 61A and 61B
And the molding machine 32 is moved forward and backward by the slide cylinder 34, and the tip tapered surface portion 105 of the branch nozzle 100 is removed.
Can be performed by contacting the taper surface of the molds 41, 42 or the frame body 20.

The following effects can be achieved in the embodiment described above. (1) Since the molten resin injected from the nozzle tip of the injection molding machine was branched by the branch nozzle provided between the injection nozzle and the mold, the runner branch in the mold was eliminated and the cold runner in the mold was eliminated. Becomes shorter. (2) Since the injection nozzle of the injection molding machine is composed of a branch nozzle having a plurality of injection holes, the injection distance from the injection molding machine to the mold is shortened and the runner inside the mold is simplified. (3) The branch nozzle is composed of one injection hole, two branch passages with a predetermined gradient, and an inflow hole that connects to the branch passage in the same direction as the injection hole, and each connecting portion has a curvature of more than twice that of the flow passage. Since it is constructed by taking out, it is possible to eliminate resin retention and improve the flow, and to improve the injection directionality by providing a rectilinear section in the mold direction to improve the balance of the injection amount between nozzle holes and to perform multi-cavity molding. Stabilize the injection and injection amount. (4) A branch nozzle with three inflow holes connects a T-shaped branch passage from both ends of the branch flow passage, and joins these two T-shaped branch passages at a Y-shaped junction, and the tip end thereof. Since the straight advancing portion 124 is provided in the above, the resin staying is eliminated, the injection directionality is improved, the injection amount balance between the nozzle holes is improved, and the injection and injection amount in multi-cavity molding are stabilized. (5) By making the runner of the frame body a through hole, the runner's branching in the mold including the frame body is eliminated, the convex (wavy or mountain) bending of the runner is eliminated, and it becomes a straight runner. The shorter length also reduces the loss of injection pressure and improves the resin flow. Also, the machining of the runner is simplified. (6) By making the runner of the frame body a through hole, the frame body and the mold can be fitted well on the taper surface of the frame body and the inner surface of the terminal holding part, and the taper surface is pushed out by mold clamping. Since the inner side of the terminal holding portion abuts on the mold, the manufacturing process is simplified, and the fitting of the frame body and the mold is not damaged during mold clamping, and galling is eliminated. (7) Since the tip of the nozzle has a flat taper surface and is brought into contact with the frame body having the taper surface, even if multiple nozzle pitches change in dimension due to thermal expansion or if there is an error with the sprue side pitch, holes It can be absorbed due to the difference in diameter and will not cause resin leakage. (8) The branch nozzle is fixed to the mounting plate of the lower mold by a fixing tool via an elastic body, and is always in contact with the injection nozzle, so there is no resin leakage between the injection nozzle and the branch nozzle, and the resin is hardened. Disappears.

[0033]

As described in the foregoing, the injection molding method of the present invention, and according to the device, the molding resin injected from Bruno nozzle of the injection molding machine branches through a branch nozzle, a branched-molded resin Since it is designed to fill multiple cavities of the mold that has been clamped to mold multiple molded bodies,
It is possible to simplify the device, stabilize the injection amount of resin, stabilize the injection work, facilitate the processing of the device, prevent damage to the device, and prevent resin leakage.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an injection molding apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing setting of a frame body in a mold.

FIG. 3 is an explanatory view showing a branch nozzle.

FIG. 4 is an explanatory view showing a frame body.

FIG. 5 is an explanatory diagram showing a second embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a third embodiment of the present invention.

[Explanation of symbols]

10 power cord 20 frame 21 terminal holding part 22 cord holding part 23 runner 24 terminal holder 24A plug terminal 25, 26
Cord holder 27 Tapered surface 31 Molding machine stand 32 Molding machine body 32A
J 33 Injection nozzle 34 Slide cylinder 35 Upper mold mounting part 36 Lower mold mounting part 37 Screw 38 Limit
Ttosuitchi 41 upper mold 42 lower mold 43A, 43B frame feeding rails 44A, 4
4B cavity 45A, 45B, 45C, 45D frame engaging groove 46 taper surface 47 runner 61A, 61B cradle 62A ₁ , 62A ₂ , 62A ₃ , 62B ₁ , 62B ₂ ,
62B ₃ heat insulating material 64 mounting base 66A, 6
6B elastic body 100 branch nozzle 101,1
02 Split body 103 Sprue 104 Nozzle 105 Tapered surface 106 Injection holes 107, 108 Branch flow paths 109, 1
10 Straight advancing part 111A, 111B, 111C inflow hole 112, 1
13 heaters 121, 122 branch path 123 Y
Glyph confluence section 124 Straight section

Claims (11)

[Claims] 1. An injection molding method for molding a molded body by filling a molding resin, which is injected from a nozzle of an injection molding machine, into a cavity of a molding die, the molding resin being injected from the nozzle of the injection molding machine. An injection molding method, characterized by branching through a branching nozzle, filling the branched molding resin into a plurality of cavities of a clamped molding die to mold a plurality of molded bodies. 2. An injection molding method for molding a molding by filling a molding resin injected from a nozzle of an injection molding machine into a cavity of a molding die, wherein the nozzle of the injection molding machine has a plurality of injection holes. It is configured by a branch nozzle, the injection molding resin is branched through the branch nozzle, and the branched molding resin is filled in a plurality of cavities of a clamped molding die to form a plurality of molded bodies. An injection molding method characterized by the above. 3. Set the plurality of insert members in the molded frame body, a plurality of insert members placed between the mold upper and lower said molded frame body is clamping the multiple of the mold cavity Located inside the injection molding machine , the injection nozzle of the injection molding machine is brought into close contact with the through-runner of the molding frame, and the plurality of cavities are filled with the molding resin through the through-runner and the runner provided in the mold. Characteristic injection molding method. 4. The injection molding method according to claim 3, wherein the injection nozzle is brought into close contact with a plurality of through runners of the molding frame through a branch nozzle. 5. An injection molding apparatus for filling a molding die with a molding resin injected from a nozzle of an injection molding machine to form a molded body, wherein a branch nozzle is provided between the nozzle and the molding die. The branch nozzle has a plurality of injection holes for injecting the molding resin from the nozzle, a branch portion for branching the injection hole into a plurality of portions, and a plurality of portions for allowing the molding resin of the branch portion to flow into a plurality of runners of the mold. An injection molding device having an inflow hole. 6. An injection molding apparatus for filling a molding die with a molding resin injected from a nozzle of an injection molding machine to mold a molding, wherein the nozzle is injected with the molding resin from the injection molding machine. An injection molding apparatus comprising: an injection hole, a branch portion that branches the injection hole into a plurality, and a plurality of inflow holes that allow the molding resin of the branch portion to flow into a plurality of runners of the mold. 7. The branch portion is formed by a plurality of right-angled passages branched from the injection hole and having a predetermined angle in the horizontal direction, and the plurality of inflow holes are formed in a substantially right-angled direction with respect to the right-angled passage. The injection molding apparatus according to claim 5, wherein the injection molding device is formed by a plurality of horizontal passages that are formed, and is configured by combining a pair of divided bodies. 8. The pair of branch nozzles has three said inflow holes, and the central inflow hole is a pair of horizontal passages having a Y-shaped branch portion provided in the vicinity of the branch points of two right-angled passages. The injection molding apparatus according to claim 5, wherein the divided bodies are combined. 9. The branch nozzle is held on both sides by a branch nozzle fixing tool provided on a mounting fixing plate of the mold, and the branch nozzle fixing tool holds the nozzle by interposing a heat insulating material. while, above with one pressing the branch nozzle always injection nozzle side toward the side of the branch nozzle formed by interposing a contact with the elastic body both claim 5, claim 7, wherein
Item 9. The injection molding apparatus according to any one of Items 8. 10. An injection molding apparatus for branching a molding resin injected from an injection molding machine into a plurality of pieces by a branching nozzle to mold a molded body into an insert member arranged in a molding die, wherein the insert is placed at a predetermined position. A molding frame is used to hold and arrange at a predetermined position in the molding die, and the molding frame is configured such that the molding resin branched by a branch nozzle is supplied from a horizontal passage of the branch nozzle to a plurality of molding molds. An injection molding apparatus characterized in that it has a plurality of through holes for straight injection up to the runner. 11. A molding frame in which an insert member is set and the outer surface of which a through-runner is formed is tapered, and a cavity which is located above and below the molding frame and in which the insert member is arranged at a predetermined position. And a die having a tapered engagement groove that engages with the tapered outer surface, and an injection having a tapered ejection surface that is in close contact with the through runner and that corresponds to the tapered outer surface. An injection molding device comprising a molding machine.