JPH09193198A - Injection molding mold assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prolong a life of a mold while a noise in a clamping process is prevented from occurring. SOLUTION: In a mold clamping process a shock absorber 36 for absorbing shock generated between a fixed side mold base 32 being a parting line face PL and a movable side mold base 40, or between a fixed side fitting plate 31 and a runner stripper plate 51, is provided. The shock absorbers 36 are provided by each plurality of pieces to the fixed side fitting plate 31, the fixed side mold base 32, the movable side mold base 40, etc.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD OF THE INVENTION The present invention relates to an injection mold apparatus.

[0002]

2. Description of the Related Art There are various types of injection molding die devices depending on the shape of the molded product, the manufacturing lot, etc. As a classification, there are two plate molds depending on the number of divided molds when the mold is opened. It may be distinguished from a 3-plate mold. In any case, the basic configuration of these injection molding die devices is a fixed-side die equipped with a runner that is fixed to the molding machine body and supplies molding resin, and moves forward and backward with respect to this fixed-side die. It is composed of a molded product and a movable die provided with an ejector mechanism in combination.

The injection molding process includes a mold clamping process as a first process, a molding resin injection process as a second process, and a mold opening process including a molded product ejection process as a third process. Injection molding is one in which these three steps are used as one cycle to form molded products one after another, but improving productivity is nothing but shortening the time of this one cycle. Generally, as the most effective means for shortening the time of one cycle, it is adopted to increase the moving speed of the movable side mold that moves back and forth with respect to the fixed side mold in the mold clamping process and the mold opening process. Has been done.

In the case of a three-plate mold, in the mold opening step, the fixed side mold plate and the runner stripper plate are first opened to cut the gate portion between the molded product and the runner. A compression coil spring is inserted between the stationary mold plate and the runner stripper plate. Then, in general, when the movable side mold advances toward the fixed side mold in the mold clamping process, the movable side mold between the movable side mold plate and the fixed side mold plate in the three-plate mold (parting line surface) The runner stripper plate moves to the fixed side mounting plate because it begins to close from the place with less resistance (friction) to mold clamping between the plate and the runner stripper plate and between the runner stripper plate and the fixed side mounting plate. In addition to the moving speed of the side mold, the elastic force of this compression coil spring is applied to accelerate and make contact.

[0005]

Increasing the moving speed of the movable side mold causes a strong impact on the parting line surface and, in the case of a three-plate mold, a divided surface of the fixed side mold, resulting in an impact noise. However, there are problems that various problems such as occurrence of scratches, galling of the guide pin, and shortening of the life of the mold due to impact occur. To cope with this, the moving speed of the movable side mold is controlled to reduce the speed at the position where the impact is generated to suppress the generation of the impact, but this requires a long time for one cycle. This is a cause of impeding the improvement in productivity of injection molding.

[0006]

In order to solve the above problems, the present invention provides a shock absorber on a fixed-side mold plate or a movable-side mold plate that abuts as a parting line surface in a two-plate mold, and clamps the mold. The shock generated at the time of is absorbed.

Further, in the three-plate mold, at least one of a fixed-side mold plate or a movable-side mold plate that abuts as a parting line surface and a surface of the fixed-side mounting plate facing the runner stripper plate, or both molds. By providing a shock absorber on both of the plates and the fixed side mounting plate, the shock generated during mold clamping is absorbed.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention has a fixed-side mold having a fixed-side mounting plate and a fixed-side mold plate, and a movable-side mold plate facing the fixed-side mold plate. An injection-molding die device comprising a movable-side die that can be moved forward and backward, and a cavity can be formed on the parting line surfaces of both dies by clamping the fixed-side die plate or the movable-side die. The plate is provided with a shock absorber that absorbs the shock generated between the two mold plates facing each other during the mold clamping process.

A three-plate mold including a fixed-side mold including a fixed-side mounting plate, a liner stripper plate, and a fixed-side mold plate, and a movable-side mold having a movable-side mold plate facing the fixed-side mold. In this case, it is advisable to provide a shock absorber on the fixed side mounting plate to absorb the shock generated between the fixed side mounting plate and the runner stripper plate during mold clamping. A shock absorber may be provided on the fixed-side mold plate or the movable-side mold plate in order to absorb the shock generated in the.

In the case of a three plate mold, preferably
In order to absorb both the impact generated between the fixed side mounting plate and the runner stripper plate and the impact generated on the parting-in surface, either the fixed side mold plate or the movable side mold plate and the fixed side mounting plate are absorbed. A shock absorber should be provided.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. First, as a first embodiment, a two-plate injection molding die apparatus will be described with reference to FIGS. As is well known, the two-plate mold is the most standard mold structure composed of the fixed mold P and the movable mold Q, and has a structure of being divided into a fixed side and a movable side when the mold is opened. (See FIG. 2).

The fixed mold P will be described. As shown in FIG. 1, a sprue bush 3 is provided in the center of the stationary mold plate 1 to supply molding resin to the cavity 2a from the sprue 3a through the runner portion 10a upon receiving the molding machine nozzle connection. . The sprue bush 3 is configured so as not to be separated from the fixed-side mold P via the locate ring 4. On the front surface of the stationary mold plate 2, there is formed a cavity portion 2a which forms a cavity C together with a core described later. Further, guide pin bushes 5 to be fitted with guide pins, which will be described later, are provided at a plurality of different positions of the fixed-side mold plate 2 (only one place is shown).

Further, small oil type shock absorbers 6 are attached at four positions at different positions of the fixed side mold plate 2 (only one position is shown). The shock absorber 6 is
A mounting recess 2b formed by digging a predetermined depth from the back surface of the fixed-side template 2 and a threaded portion 2c provided so as to penetrate from the mounting recess to the parting line surface PL side.
It is attached through.

Each shock absorber 6 has a cylinder portion 6
A male screw that can be screwed into the screw portion 2c is engraved on the outer periphery of a, and a contactor 6b is provided at one end of the cylinder portion 6a. A slit (not shown) for screwing is provided at the other end of the cylinder portion 6a so that the shock absorber 6 can be adjusted to an arbitrary position using a driver. A jam nut 6c is screwed into a portion of the cylinder portion 6a located inside the recessed portion, and the shock absorber 6 is
Can be fixed to the fixed-side template 2. The shock absorber 6 is attached to the fixed-side mold plate 2 with the tip of the cylinder portion 6a being slightly retracted from the front face of the fixed-side mold plate 2 and only the contact 6b protruding to the front face of the mold plate. . Therefore, each of these shock absorbers 6 is in a state in which the contactor 6b projects to the front surface of the fixed-side mold plate 2 when the mold is opened (see FIG. 2).

In this embodiment, the shock absorber TK21 has a stroke of 6.4 mm and a maximum absorbed energy of 0.22 kgf · m / cycle.
-2M (trade name, manufactured by ENIDINE Co., Ltd.) is adopted.

The movable die Q will be described. A through hole 7a for passing an ejector rod of a molding machine, which will be described later, is provided in the central portion of the fixed side mounting plate. A spacer block 8 is formed in the center of the front surface of the movable side mounting plate 7 to form a space 8a for accommodating an ejector mechanism described later. A receiving plate 9 is fixed to the front surface of the spacer block 8, and the space 8a is a space surrounded by the movable side mounting plate 7, the receiving plate 9 and the inner wall portion of the spacer block. A movable side mold plate 10 is fixed to the front surface of the receiving plate 9. On the parting line surface PL side of the movable mold plate 10, a runner portion 10b communicating with the sprue 3a of the fixed mold P is formed. Further, at a position adjacent to the runner portion 10a,
A core 11 is provided, and the runner portion 10a and the cavity portion 2a communicate with each other through a gate portion 10b.

In the space 8a provided inside the spacer block 8, the ejector plate 12,
13 is provided so as to be able to move forward and backward. Ejector plate 1
Ejector pins 14, sprue ejector pins 15, and return pins 16 are erected on 2 and 13. Each of these pins passes through a through hole 9a provided in the receiving plate 9, and the ejector pin 14 is provided in the bearing portion 11a of the core, and the sprue ejector pin 15 and the return pin 16 are provided in the bearing portion 10d of the movable side template 10. It is rotatably supported and provided on the front surface of the template so that it can project. The ejector pin 14 is capable of ejecting the molded product attached to the front surface of the core when the mold is opened, and the tip of the sprue ejector pin 15 is located at the bottom of the sprue lock portion 10c. It can stick out. A spring 17 is wound around the return pin 16,
The ejector plates 12 and 13 are urged by the springs 17 in the backward direction, and the ejector rods of the molding machine advance to eject the ejector plates 12 and 13 so that the pins 14, 15 and 16 are in a protruding state. The spring 17 is in a compressed state when it is in the open state, and when the ejecting process is completed, the ejector plates 12 and 13 are retracted by the spring force to return to the original position. In addition, stopper pins 18, 18 are provided on the front surface side of the movable side mounting plate 7 in the space 8a so that the retracted position of the ejector plate 12 can be regulated.

Guide pins 19 are provided upright on the movable mold plate 10. The guide pin 19 is formed in the shape of a stepped rod having a step.
By fitting a into the guide pin bush 5 provided on the fixed-side mold plate 2, the movable-side mold plate 10 and the fixed-side mold plate 2 can be brought into contact with each other at an accurate position.

The injection molding die apparatus in this embodiment includes:
In addition to the above-mentioned elements, a support pin, a temperature controller, and other elements (not shown) are provided.

Next, the operation of the injection molding die apparatus in this embodiment will be described. FIG. 2 shows a state in which the mold opening step is finished, and shows a state in which the molded product S and the runner R are projected. The mold clamping process as the first process starts from the time when the ejector rod 20 of the molding machine is retracted from this state.

First, a mold clamping cylinder of a molding machine (not shown) causes the movable mold Q to advance toward the fixed mold P, and the tip of the guide pin 19 is fitted into the guide pin bush 5. When the movable mold Q further advances, it approaches the fixed mold P while being guided by the guide pin 19. When the core 11 of the movable side mold Q starts to be inserted into the cavity portion 2a of the fixed side mold P, the movable side mold plate 1 will soon be reached.
0 approaches the fixed-side template 2 and its parting line surface PL side abuts on the tip of the contact 6b of the shock absorber 6 to further advance. When the movable side mold Q further advances, the fixed side mold P and the movable side mold Q come into close contact with each other, and the cavity portion 2 is formed on the parting line surface PL (see FIG. 1).
a and the runner portion 10a are formed.

In this mold clamping step, when the contactor 6b of the shock absorber 6 is pushed by the movable mold Q, the movable mold Q which approaches at high speed due to the resistance generated by the oil flow in the cylinder portion 6a. Absorbs the energy of impact. As a result, when the movable-side mold plate 10 comes into contact with the fixed-side mold 2, most of the impact energy is absorbed by the shock absorber, and the generation of noise due to impact is suppressed. Further, since the impact or the like is reduced, the moving speed of the movable side mold can be increased without any trouble.

Next, the injection process as the second process is started. In the injection step, molding resin is supplied from the molding machine nozzle into the cavity 2a (cavity C) via the sprue portion 3a, the runner portion 10a and the gate 10b.

After a predetermined curing time has passed after the injection process is completed and the molding resin in the cavity C is solidified, the movable side mold Q is retracted and the mold opening process as the third process is started. . When the movable mold Q begins to retreat, the molded product S in the cavity C and the runner R in the runner part 10a and the sprue part are fixed in a state of being attached to the front surface of the movable mold plate 10 by the sprue lock part 10c. Separate from the side mold P.

In the mold opening step, the ejecting step is continuously performed. That is, when the movable mold Q retreats to a position separated from the fixed mold P by a predetermined distance,
The ejector rod 20 of the molding machine advances to push out the ejector plates 12 and 13 toward the parting line surface PL. As a result, the ejector plates 12, 1
3 moves forward and the spring 1 wound around the return pin 16
Proceed further against the spring force of 7. As the ejector plates 12 and 13 advance, the ejector pin 14 and the sprue ejector pin 15 advance, and the molded product S and runner R attached to the core 11 are pushed down. (See FIG. 2). Molded product S and runner R
Is collected by a collecting means (not shown).

When these protruding steps are completed,
When the ejector rod 20 is retracted, the ejector plates 12 and 13 are retracted by the spring 17 wound around the return pin 16, and the rear surface thereof is the stopper pin 1.
Abutting on Nos. 8 and 18, it stops. Ejector plate 1
With the return of 2 and 13 to the original position, the ejector pin 14 and the sprue ejector pin 15 also return to the original position and the one cycle process is completed, and the process waits for the next cycle process.

Next, as a second embodiment, referring to FIGS.
The plate injection molding die device will be described. In the three-plate mold, a runner stripper plate 51 is provided between the fixed-side mounting plate 31 and the fixed-side mold plate 32 of the fixed-side mold P, and a runner is provided between the fixed-side mold plate 32 and the runner stripper plate 51. It has a structure in which R is molded and divided into three pieces when the mold is opened, and the molded product S and the runner R can be separately molded.

The three-plate mold will be described below with reference to FIG. The fixed die P will be described. A sprue bush 33 is attached to the central portion of the fixed-side attachment plate 31 via a locate ring 34. The tip of the sprue 33a provided at the center of the sprue bush 33 is
Runner stripper plate 5 when clamped
1 communicates with a runner portion 32b formed between the front surface of the fixed mold plate 32 and the back surface of the fixed-side template 32.

At the center of the front surface of the stationary mold plate 32, a cavity portion 32a is formed which defines a cavity C together with a core 41 described later. The runner portion 32b is communicated with a sub-runner portion 32c provided so as to pass through the front and rear of the fixed-side template, and is communicated with the cavity C through a gate portion 32d provided at the tip thereof. . A projecting portion 52a formed at the tip of the runner lock pin 52 projects at a position facing the entrance of the sub-runner portion 32c. In addition, guide pin bushes 35 are embedded in a plurality of locations at other positions of the fixed-side template 32 (only one location is shown).

A shock absorber 36 similar to that of the first embodiment is provided at another position of the fixed side mounting plate 31. Only one shock absorber is shown,
Normally, four pieces are arranged at equal intervals. The contact 36b of each shock absorber 36 is provided so as to project to the front surface of the fixed side mounting plate 31 (see FIG. 4), but is in a state of being pushed in by the runner stripper plate 51 in the mold clamping state. . Other configurations of the shock absorber 36 (cylinder portion 36a, jam nut 36
c) is the same as in the first embodiment.

A support pin 53 is provided upright on the fixed side mounting plate 31, and the support pin 53 has support pin bushes 53a and 53b press fitted into the runner stripper plate 51 and the fixed side mold plate 32, respectively. The two plates are slidably supported via the above.

The movable die Q will be described. The movable-side mold Q of the second embodiment is formed by laminating four plates as in the first embodiment. That is, the movable side mounting plate 3
7, a spacer block 38, a receiving plate 39, and a movable side mold plate 40. A core 41 is attached to the movable side mold plate 40 so as to project to the parting line surface PL. The portion of the core 41 protruding from the mold plate is housed in the cavity portion 32a formed in the stationary mold plate 32, so that the cavity C can be formed.

In the space 38a formed inside the spacer block 38, ejector plates 42 and 43 are provided.
Are provided so as to be able to move forward and backward, and an ejector pin 44 and a runner ejector pin 45 are erected upright via two ejector plates 42 and 43. Further, a return pin (not shown) is erected upright via the two ejector plates 42, 43, and a spring (not shown) is wound around the return pin.
43 is biased in the backward direction. Movable side mounting plate 3
Stopper pins 48, 48 are provided on the front surface side of 7 so that the retracted position of the ejector plate 42 can be regulated.

Guide pins 49 are provided upright on the movable side mold plate 40, and they are fitted to the guide pin bushes 35 provided on the fixed side mold plate 32 at the time of mold clamping so that the movable side mold plate can be accurately positioned. Abutment is possible.

Further, when the mold is opened, the puller bolt 54 and the stop bolt for separating the runner stripper plate 51 from the fixed side mounting plate 31 by restricting the opening amount of the movable side mold plate 32 and the runner stripper plate 51. 55 is provided by sandwiching the runner stripper plate 51 and fixing it to the runner stripper plate 51. Puller bolt 5
Reference numeral 4 denotes a spacer block 38 and a receiving plate 3 having steps.
9, the movable head mold plate 40 and the fixed side mold plate 32 communicate with each other, the head portion 54a thereof is in a state capable of locking the fixed side mold plate 32, and the stop bolt 55 is the fixed side mounting plate 31.
In the recess 31a having a step on the back side of the and communicating with each other, the head portion 55a thereof is in a state of being capable of locking the fixed side mounting plate 31, and the male screw portion and the female screw portion provided at each tip portion. The runner stripper plate 51 is sandwiched and connected by the screwing. Therefore, at the time of mold opening, the opening amount of the movable side mold plate 32 and the runner stripper plate 51 is restricted, and the mold opening further proceeds, so that the runner stripper plate 51 moves from the fixed side mounting plate 31 to the head of the stop bolt 55. It can be separated by the stroke until the portion 55a comes into contact with the fixed side mounting plate 31.

Fixed-side template 3 on which puller bolt 54 is located
A recess 32e is formed between the 2 and the runner stripper plate 51, and the compression coil spring 56 is embedded in a state wound around the puller bolt 54.

Fixed side mold plate 32 and movable side mold Q (receiving plate 3
9) is connected via a pull ring 57. Each pulling ring 57 has pins 5 on both sides of both molds P and Q.
The shaft portion of the pin 58 is attached to the movable die plate 32 side, and the shaft portion of the pin 59 is attached to the movable die Q side along the long groove portion 57a formed in the pulling ring 57. Can be slid.

Next, the operation of the injection molding die apparatus of this embodiment will be described. FIG. 4 shows a state in which the mold opening process is completed, and shows a state in which the molded product S and the runner R are projected. The mold clamping process as the first process starts from the time when the ejector rod 20 of the molding machine is retracted from this state.

When the movable mold Q advances toward the fixed mold P by the mold clamping cylinder of the molding machine, between the movable mold plate 40 and the fixed mold plate 32 (parting line surface PL), Close between the movable side mold plate 32 and the runner stripper plate 51 and between the runner stripper plate 51 and the fixed side mounting plate 31 where there is little resistance (friction) to mold clamping. Therefore, first, between the movable-side mold plate 40 and the fixed-side mold plate 32 (parting line surface PL), the fixed-side mold plate 3 is until the tip of the guide pin 49 contacts the guide hole edge of the guide bush 35.
Between the 2 and the runner stripper plate 51, the spring 56 closes until elastic force is generated. Here, when the elastic force of the spring 56 is generated, the runner stripper plate 51 is vigorously projected to the fixed side mounting plate 31 by the elastic force of the spring 56. In this case, the shock provided on the front surface of the fixed side mounting plate 31 is reduced. The shock is absorbed by the absorber 36. Runner stripper plate 5
1 and the fixed side mounting plate 31 between the shock absorber 36
It does not close at this stage due to the resistance of.

Thereafter, with the guide pin 49 being guided by the guide bush 35, the movable side mold plate 40 and the fixed side mold plate 3 are formed.
2 (parting line surface PL) is completely closed, and the core 41 is housed in the cavity portion 32a to form the cavity C. Next, the space between the runner stripper plate 51 and the fixed-side mounting plate 31 is completely closed, the contact 36b of the shock absorber 36 is pushed in, and the tip 52a of the runner lock pin 52 is projected to the front surface of the runner stripper plate 51. It becomes a state. Further, when the movable side mold Q advances toward the fixed side mold P, finally, the space between the movable side mold plate 32 and the runner stripper plate 51 is completely closed, and the spring 56 is compressed. From the sprue 33a to the runner portion 32b,
A flow path of the molding resin is formed to communicate with the cavity 32a through the sub-runner portion 32c and the gate portion 32d, and all the plates constituting the mold are brought into close contact with each other to be in a mold clamped state.

If the moving speed of the movable side mold Q is increased, as described above, there is a problem that a shock is generated in each plate during the mold clamping process, which causes noise and vibration. . However, in the present invention, the shock absorber 3 is capable of absorbing such an impact between the fixed-side mounting plate 31 and the runner stripper plate 51 that are most likely to generate an impact.
Since 6 is provided, this can be suppressed.

Here, the molding resin is injected from a molding machine nozzle (not shown), and the resin is supplied into the cavity portion 32a (cavity C) through the sprue 33a, the runner portion 32b, the sub-runner portion 32c and the gate portion 32d. (Injection process).

After the prescribed curing time has elapsed and the supplied molding resin is solidified, the movable mold Q is retracted (mold opening step). Along with this, the bias of the spring 56 initially opens the gap between the fixed-side mold plate 32 and the runner stripper plate 51. At this time, since the runner R is held by the runner lock pin 52, the fixed-side mold plate 32 advances while the runner R is left on the front surface of the runner stripper plate 51. And the runner R remains in the fixed-side mold P.

When the movable side mold Q is further retracted, the space between the fixed side mold plate 32 and the runner stripper plate 51 is completely opened, and then the movable side mold plate 40 and the fixed side mold plate 32 (parting). The line surface PL) completely opens and the molded product S appears in a state of being attached to the movable side mold plate 40. Then, when the fixed-side template 32 is further pulled out forward by the pulling ring 57, the runner stripper plate 51 moves forward through the puller bolt 54, so that the runner R attached to the front surface of the runner R is attached to the tip of the runner lock pin 52. Is forcibly separated from and falls. In addition, the movement amount of the runner stripper plate 51 depends on the stop bolt 5
It is regulated by 5.

In parallel with the retreat of the movable die Q, the ejector rod 20 of the molding machine advances and the ejector plates 42 and 43 are relatively advanced in the space 38a, so that the ejector pin 44 and the runner ejector are ejected. The pin 45 is advanced, and the molded product S cut by the gate portion 32d is projected and dropped. After the ejecting step of the molded product is completed, when the ejector rod 50 retreats, the ejector plates 42 and 43 are returned to their original positions by springs (not shown) wound around return pins (not shown) and returned to the initial state. .

As described above, in the process cycle of the injection molding die apparatus, when the movable die Q advances and the plates of the fixed line die contact each other between the parting line surfaces PL, Since increasing the moving speed of the mold causes problems such as noise generation and shortening of the mold life due to impact, this speed has been suppressed. The present invention absorbs these shocks by providing shock absorbers at these shock occurrence points.
Therefore, since it is possible to suppress the generation of noise and the shortening of the mold life, it is possible to increase the moving speed of the movable mold Q and shorten the time required for one cycle. It is possible to improve the productivity of injection molding.

The shock absorber is installed on the parting line surface in the first embodiment and between the stationary mold plate and the runner stripper plate in the second embodiment. It may be provided at an arbitrary position between the plates in relation to the conditions of adoption of the molding die device. When a shock absorber is provided on the parting line surface, it may be attached to the movable side mold plate.

The injection mold apparatus has a typical structure for convenience of explanation in this embodiment, but a complicated structure other than this type can also be adopted. In addition, it is also applicable to a cassette mold type injection molding mold device.

[0049]

According to the present invention, since a shock absorber that absorbs the impact between the parting line surface of the injection molding die apparatus and each plate of the die, which is apt to generate an impact, is provided at the time of mold clamping. The impact generated on the Therefore, it is possible to suppress the generation of noise, improve the working environment, and prevent damage to the die to extend its life. In addition, since it is possible to prevent noise and damage to the mold, it is possible to increase the moving speed of the movable mold that moves back and forth with respect to the fixed mold, thus improving productivity. Become.

Further, by providing the shock absorbers at a plurality of positions, the acting force of the shock absorbers can be arranged in a well-balanced manner, and the mold clamping and mold opening operations become smoother.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a clamped state of a two-plate mold in a first embodiment.

FIG. 2 is a sectional view showing the mold open state of the same.

FIG. 3 is a sectional view showing a clamped state of a three-plate mold in a second embodiment.

FIG. 4 is a sectional view showing the mold open state of the same.

[Explanation of symbols]

 P Fixed side mold Q Movable side mold C Cavity PL Parting line surface 1,11 Fixed side mounting plate 2,12 Fixed side mold plate 6,36 Shock absorber 10,40 Movable side mold plate 51 Runner stripper plate

Claims (3)

[Claims] 1. A fixed-side mold having a fixed-side mounting plate and a fixed-side mold plate, and a movable-side mold plate facing the fixed-side mold plate, the movable-side mold plate being provided so as to be movable back and forth with respect to the fixed-side mold. An injection molding die apparatus comprising a movable side die, which is capable of forming a cavity on a parting line surface of both the die by clamping, wherein the fixed side die plate or the movable side die plate is An injection molding mold apparatus, comprising a shock absorber for absorbing a shock generated between the mold plates facing each other during the mold clamping step. 2. A fixed-side mold comprising a fixed-side mounting plate, a runner stripper plate, and a fixed-side mold plate, and a movable-side mold plate facing the fixed-side mold plate. An injection-molding die device comprising a movable-side die that is capable of advancing and retracting, and capable of forming a cavity on a parting line surface by die clamping, comprising at least the fixed-side attachment plate and the fixed-side die plate or the movable side. A shock absorber is provided on one of the mold plates to absorb a shock generated between the fixed side mounting plate and the runner stripper plate during the mold clamping step or between the two molds facing each other. An injection molding die device characterized by: 3. An injection molding die apparatus, wherein the shock absorbers according to claims 1 and 2 are provided at a plurality of locations.