JP3232435B2 - Injection mold equipment - 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 mold apparatus.

[0002]

2. Description of the Related Art There are various types of injection molding apparatus depending on the shape of a molded product, a production lot, and the like. As a classification, a two-plate mold is used depending on the number of divided molds when the mold is opened. It may be distinguished from a three-plate mold. In any case, the basic configuration of these injection molding mold devices is a fixed mold having a runner that is fixed to the molding machine main body and supplies molding resin, and moves forward and backward with respect to the fixed mold. It is formed by combining a movable mold with an ejector mechanism for a molded product.

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 involves molding these products one after another with these three steps as one cycle. Improving productivity is nothing less than shortening the time of one cycle. Generally, as the most effective means for reducing the time of one cycle, it is adopted to increase the moving speed of the movable mold moving forward and backward with respect to the fixed mold in the mold clamping process and the mold opening process. Have been.

[0004] In the case of a three-plate mold, in the mold opening step, first, in order to cut the gate between the molded product and the runner, the gap between the fixed mold plate and the runner stripper plate is first opened. A compression coil spring is inserted between the fixed mold plate and the runner stripper plate. Generally, when the movable mold advances toward the fixed mold in the mold clamping step, the movable mold is moved between the movable mold plate and the fixed mold plate (parting line surface) in the three-plate mold. Between the plate and the runner stripper plate, and between the runner stripper plate and the fixed side mounting plate, the runner stripper plate can be moved to the fixed side mounting plate to start closing from the place with less resistance (friction) against mold clamping. In addition to the moving speed of the side mold, the elasticity of the compression coil spring is applied to accelerate and make contact.

[0005]

In order to increase the moving speed of the movable mold, a strong impact is generated on the parting line surface or, in the case of a three-plate mold, on the split surface of the fixed mold. There is a problem that various problems occur, such as generation of the guide pin, galling of the guide pin, and shortening of the life of the mold due to impact. As a countermeasure, the moving speed of the movable mold is controlled to reduce the speed at the position where the impact is generated to suppress the generation of the impact. However, this increases the time required for one cycle. This is one of the factors that hinders the improvement in productivity of injection molding.

[0006]

The present invention in order to solve the above problems BRIEF SUMMARY OF THE INVENTION may, OH as parting line plane in 2 plate mold on the fixed side mold plate or the movable side mold plate abuts
Provide a shock absorber of the yl type and move the movable mold
Even if the speed is increased, the impact generated during mold clamping is absorbed.

In the three-plate mold, at least one of the fixed mold plate or the movable mold plate which abuts as the parting line surface and the fixed mounting plate facing the runner stripper plate, or both molds. By providing an oil-type shock absorber on either one of the plates and the fixed-side mounting plate, the moving speed of the movable-side mold can be reduced.
Even if the speed is increased, the impact generated during mold clamping is absorbed.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention has a fixed mold having a fixed mounting plate and a fixed mold, and a movable mold opposed to the fixed mold. A movable mold that is provided so as to be capable of moving forward and backward, and an injection molding mold apparatus capable of forming a cavity in a parting line surface of both molds by mold clamping, wherein the fixed mold plate or the movable mold is provided. the side mold plate when the mold clamping step, the movement of the movable die
After that, before the two mold plates come into contact with each other, the contact is
An oil-type shock absorber is provided which abuts on one of the two plates and absorbs an impact generated between the two mold plates.

[0010] A fixed-side mold comprising 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 3
In the case of a plate mold, a shock absorber for absorbing the shock generated between the fixed mounting plate and the runner stripper plate during mold clamping may be provided on the fixed mounting plate. An oil-type shock absorber may be provided on the fixed-side mold plate or the movable-side mold plate in order to absorb the shock generated on the rolling line surface.

In the case of a three-plate mold, preferably,
Either the fixed-side mold plate or the movable-side mold plate and the fixed-side mounting plate are mounted so that both the shock generated between the fixed-side mounting plate and the runner stripper plate and the shock generated on the parting-in surface are absorbed. It is preferable to provide an oil-type shock absorber. Thus, in the case of a three-plate mold
Are at least the fixed side mounting plate and the fixed side template
Alternatively, any one of the movable side mold plates has the mold clamping step
When moving the movable mold, move the fixed mold
The contact of the runner stripper plate and the
Before the contact, the contact is
Either one of the ripper plates or both of the above mold plates
Abutting one of them, the fixed side mounting plate and the runners
Between the mold and the tripper plate or with the opposite molds
Oil-type shock absorber that absorbs shocks generated between
Server is provided.

[0011]

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

The fixed mold P will be described. As shown in FIG. 1, a sprue bush 3 for supplying a molding resin from a sprue 3a to a cavity 2a through a runner 10a in response to a connection of a molding machine nozzle is provided at a central portion of the fixed side mounting plate 1.
Is provided. Sprue bush 3 is located ring 4
Through the fixed side mold P.
On the front surface of the fixed side mold plate 2, a cavity portion 2a for forming a cavity C together with a core described later is formed. Further, guide pin bushes 5 to be fitted with guide pins 19 described later are provided at a plurality of different positions of the fixed side template 2 (only one position is shown).

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

Each of the shock absorbers 6 includes a cylinder 6
A male screw which can be screwed into the screw portion 2c is engraved on the outer periphery of the cylinder a, and a contact 6b is provided at one end of the cylinder portion 6a. At the other end of the cylinder portion 6a, a slot (not shown) for screwing is provided, and 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 in the mounting recess 2b , so that the shock absorber 6 can be fixed to the fixed mold plate 2. The shock absorber 6 is mounted on the fixed-side mold plate 2 in a state where the tip of the cylinder portion 6a is slightly retreated from the front surface of the fixed-side mold plate 2 and only the contacts 6b protrude from the front surface of the mold plate. . Therefore, each of these shock absorbers 6
When the mold is opened, only the contact 6b projects to the front surface of the fixed mold plate 2 (see FIG. 2).

In this embodiment, the shock absorber 6 is used.
TK2 having a stroke of 6.4 mm and a maximum absorption energy of 0.22 kgfm / cycle
1-2M (trade name, manufactured by Enidyne Co., Ltd.) is employed.

The movable mold Q will be described. A through hole 7a for passing an ejector rod 20 of a molding machine, which will be described later, is provided at the center of the movable-side mounting plate 7. A spacer block 8, which forms a space 8a for accommodating an ejector mechanism described later in the center, is in contact with the front surface of the movable-side mounting plate 7. A receiving plate 9 is fixed to the front surface of the spacer block 8, and a space 8a is a space surrounded by the movable mounting plate 7, the receiving plate 9, and the inner wall of the spacer block 8.
A movable 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 10a communicating with the sprue 3a of the fixed mold P is formed. A core 11 is provided at a position adjacent to the runner section 10a, and the runner section 10a and the cavity section 2 are provided.
a is communicated with the gate part 10b.

In the space 8a provided inside the spacer block 8, there are ejector plates 12,
13 is provided so as to be able to advance and retreat. Ejector plate 1
Ejector pins 14, sprue ejector pins 15, and return pins 16 are provided upright on the pins 2 and 13, respectively.
Each of these pins is provided with a through hole 9 provided in the receiving plate 9.
a, the ejector pin 14 is connected to the bearing 1 of the core 11.
The sprue ejector pin 15 and the return pin 16 are rotatably supported by the bearing portion 10d of the movable mold plate 10, and are provided so as to protrude from the front surface of the mold plate 10. The ejector pin 14 can protrude the molded product S attached to the front surface of the core 11 at the time of opening the mold. The tip of the sprue ejector pin 15 is located at the bottom of the sprue lock 10c. R can be protruded. A spring 17 is wound around the return pin 16, and the ejector plates 12 and 13 are
The ejector rod 20 of the molding machine advances, the ejector plates 12, 13 advance, and the pins 14, 15, 16 are in a protruding state, as shown in FIG. Sometimes, the spring 17 is in a compressed state, and when the protruding process is completed, the ejector plates 12, 13 are retracted by the spring force and returned to the original position as shown in FIG. A stopper pin 1 is provided on the front side of the movable mounting plate 7 in the space 8a.
8 and 18 are provided so that the retracted position of the ejector plate 12 can be regulated.

A guide pin 19 stands on the movable mold plate 10. The guide pin 19 is formed in the shape of a stepped bar having a step.
By fitting a into the guide pin bush 5 provided on the fixed mold plate 2, the movable mold plate 10 and the fixed mold plate 2 can be brought into contact at an accurate position.

In the injection molding apparatus of this embodiment,
In addition to the above-described components, a support pin, a temperature control device, and other components, not shown, are provided.

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

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

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

Next, the process proceeds to the injection process as a second process. 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 elapses after the injection step is completed and the molding resin in the cavity C is solidified, the movable mold Q is then retracted and the process proceeds to a third step of opening the mold. . When the movable mold Q starts to recede, the molded product S in the cavity C and the runner R in the runner part 10a and the sprue part are connected by the sprue lock part 10c.
It is separated from the fixed mold P while being attached to the front surface of the movable mold plate 10.

In the mold opening step, a protruding step is performed successively. That is, when the movable mold Q retreats to a position away from the fixed mold P by a predetermined distance,
The ejector rod 20 of the molding machine moves forward and pushes the ejector plates 12, 13 toward the parting line plane PL. As a result, the ejector plates 12 and 13 advance, and further advance against the spring force of the spring 17 wound around the return pin 16. Ejector plate 1
The ejector pins 14 and the sprue ejector pins 15 are advanced by the advance of 2, 13, and the molded product S and the runner R attached to the core 11 are pushed down (see FIG. 2). The molded product S and the runner R are collected by a collecting unit (not shown).

After 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 back surface thereof is provided with the stopper pins 18 and 1.
Stops in contact with 8. Ejector plates 12, 13
With the return to the original position, the ejector pin 14 and the sprue ejector pin 15 also return to the original position, one cycle of the process is completed, and waits for the next cycle process.

Next, a second embodiment will be described with reference to FIGS.
The plate injection mold apparatus will be described. In the three-plate mold, a runner stripper plate 51 is provided between a fixed-side mounting plate 31 and a fixed-side mold plate 32 of a fixed-side mold P, and a runner stripper plate 51 is provided between the fixed-side mold plate 32 and the runner stripper plate 51. R is formed into three pieces when the mold is opened, and the molded product S and the runner R can be separated and formed.

Hereinafter, the three-plate mold will be described with reference to FIG. The fixed mold P will be described. A sprue bush 33 is attached to the center of the fixed-side attachment plate 31 via a locate ring 34. Spruce bush 3
The tip of the sprue 33a provided at the center of the runner portion 3 is a runner portion 32 formed between the front surface of the runner stripper plate 51 and the rear surface of the fixed mold plate 32 when the mold is clamped.
b.

At the center of the front surface of the fixed mold plate 32, a cavity portion 32a for forming a cavity C together with a core 41 described later is formed. A sub-runner portion 32c is provided to penetrate the runner portion 32b so as to penetrate the front and rear sides of the fixed mold plate. The sub-runner portion 32c communicates with the cavity C via a gate portion 32d provided at the tip. A protruding 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, a guide pin bush 35 is buried in a plurality of places at other positions of the fixed mold plate 32 (only one place is shown).

At another position of the fixed side mounting plate 31, a shock absorber 36 similar to that of the first embodiment is provided. Although only one shock absorber is shown,
Normally, four are arranged at equal intervals. The contact 36b of each shock absorber 36 is provided so as to protrude from the front surface of the fixed-side mounting plate 31 (see FIG. 4), but is pressed by the runner stripper plate 51 as shown in FIG. It is in the state of having been lost. Other configurations of the shock absorber 36 (the cylinder portion 36a and the jam nut 36c) are the same as those of the first embodiment.

A support pin 53 is provided upright on the fixed-side mounting plate 31. The support pin 53 is formed of 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 32, 51 are slidably supported through the two plates.

The movable mold Q will be described. The movable 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 mold plate 40. The core 41 is attached to the movable mold plate 40 so as to protrude from the parting line plane PL. The portion of the core 41 protruding from the template can be formed in the cavity 32a formed in the fixed-side template 32 to form the cavity C.

Ejector plates 42 and 43 are provided in a space 38a formed inside the spacer block 38 so that the ejector plates 42 and 43 can move forward and backward.
An ejector pin 44 and a runner ejector pin 45 are erected through 2 and 43. A return pin (not shown) is provided via two ejector plates 42 and 43.
A spring (not shown) is wound around the return pin, and the ejector plates 42 and 43 are urged in the retreating direction. Stopper pins 48, 48 are provided on the front side of the movable-side mounting plate 37 so that the retracted position of the ejector plate 42 can be regulated.

A guide pin 49 is erected on the movable mold plate 40 and fits into a guide pin bush 35 provided on the fixed mold plate 32 when the mold is clamped, so that the movable mold plate is positioned at an accurate position. Contact is possible.

When the mold is opened, the runner stripper plate 51 and the runner stripper plate 51 are restricted in the opening amount so that the runner stripper plate 51 is fixed to the fixed mounting plate 3.
A puller bolt 54 and a stop bolt 55 for separating the runner stripper 1 from each other are provided by fixing the runner stripper plate 51 to the runner stripper plate 51. The puller bolt 54 has a step so that the spacer block 38, the receiving plate 39, and the movable mold plate 40
And the head 5 in the through hole communicating with the fixed side mold plate 32.
Reference numeral 4a denotes a state in which the fixed-side mold plate 32 can be locked. The stop bolt 55 has a head portion 55a in a concave portion communicating with a step on the back side of the fixed-side attachment plate 31. 31 is in a lockable state, and is connected via a runner stripper plate 51 by screwing a male screw portion and a female screw portion provided at each end portion. Therefore,
When the mold is opened, the amount of opening between the movable mold plate 32 and the runner stripper plate 51 is regulated, and as the mold is further opened, the runner stripper plate 51 is moved from the fixed mounting plate 31 to the head 55a of the stop bolt 55. Can be pulled away by a stroke until it comes into contact with the fixed-side mounting plate 31.

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

The fixed mold 32 and the movable mold Q (receiving plate 3
9) is connected via a tension ring 57. Each tension ring 57 is provided with a pin 5 on both sides of both molds P and Q.
The movable mold plate 32 has a shaft portion of the pin 58 on the movable mold plate 32 side, and the movable mold die Q has a shaft portion of the pin 59 formed on the tension ring 57 along a long groove portion 57a. Slidable.

Next, the operation of the injection mold apparatus of this embodiment will be described. FIG. 4 shows a state in which the mold opening step has been completed, in which the molded product S and the runner R are projected. The mold clamping step as the first step is started 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, the gap between the movable mold plate 40 and the fixed mold plate 32 (parting line plane PL) Movable mold plate 32 and runner stripper plate 5
1 and between the runner stripper plate 51 and the fixed-side mounting plate 31, starting to close from a place where resistance (friction) to mold clamping is small. Therefore, first, the movable side template 4
0 (the parting line plane P
In L), the guide pin 49 closes until the elastic force of the spring 56 is generated between the fixed side mold plate 32 and the runner stripper plate 51 until the tip of the guide pin 49 hits the edge of the guide hole of the guide bush 35. Here, when the elasticity of the spring 56 is generated, the runner stripper plate 51
Is projected to the fixed side mounting plate 31 with the elasticity of
In this case, the shock is absorbed by the shock absorber 36 provided on the front surface of the fixed-side mounting plate 31. Runner stripper plate 51 and fixed mounting plate 31
Is not closed at this stage due to the resistance of the shock absorber 36.

Thereafter, with the guide pin 49 being guided by the guide bush 35, the movable mold plate 40 and the fixed mold plate 3
2 (parting line plane PL) is completely closed, and the core 41 is housed in the cavity 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 projection 52a at the tip of the runner lock pin 52 is moved to the front of the runner stripper plate 51. It will be in a state of protruding. further,
When the movable mold Q advances toward the fixed mold P, finally, the fixed mold plate 32 and the runner stripper plate 51 are moved.
Is completely closed, the spring 56 is in a compressed state, and the sprue 33a is moved from the runner portion 32b to the sub-runner portion 3.
2c, the flow path of the molding resin is formed to communicate with the cavity 32a through the gate 32d, so that all the plates constituting the mold are brought into close contact with the mold.

If the moving speed of the movable mold Q is increased, an impact is generated in each plate during the mold clamping process as described above, which causes a problem that noise and vibration are generated. . However, in the present invention, since the shock absorber 36 is provided between the fixed-side mounting plate 31 and the runner stripper plate 51 where the shock is most likely to be generated, the shock absorber 36 is provided so as to be able to absorb such a shock.

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

After a predetermined curing time has elapsed and the supplied molding resin has solidified, the movable mold Q is retracted (mold opening step). Accordingly, the gap between the fixed mold plate 32 and the runner stripper plate 51 is first opened by the bias of the spring 56. 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, so that the molded product S and the runner R are connected to the gate portion 32d. (The gate is cut), and the runner R remains in the fixed mold P.

When the movable mold Q further retreats, the space between the fixed mold plate 32 and the runner stripper plate 51 is completely opened, and then the space between the movable mold plate 40 and the fixed mold plate 32 (parting). The line surface PL) is completely opened and the molded product S
Appear on the movable mold plate 40. When the fixed side template 32 is further pulled forward by the tension ring 57, the runner stripper plate 51 advances through the puller bolt 54. Fall off forcefully. The moving amount of the run stripper plate 51 is regulated by the stop bolt 55.

In parallel with the retreat of the movable mold 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 The pin 45 is advanced, and the molded product S cut by the gate 32d is projected and dropped. When the ejector rod 50 is retracted after the end of the molded product protruding step, the ejector plates 42 and 43 return to their original positions by springs (not shown) wound around return pins (not shown).
Return to the initial state.

As described above, in the process cycle using the injection molding die apparatus, when the movable die Q advances and the plates of the fixed die contact with each other between the parting line surfaces PL or the fixed die. Increasing the moving speed of the mold causes problems such as generation of noise and shortening of the life of the mold due to impact, so that this speed has been suppressed. According to the present invention, these shocks are absorbed by providing shock absorbers at these shock generating locations.
Therefore, since it is possible to suppress the generation of noise and a reduction in the life of the mold, the moving speed of the movable mold Q can be increased, and the time required for one cycle can be shortened. It is possible to improve the productivity of injection molding.

In the first embodiment, the installation position of the shock absorber is on the parting line surface, and in the second embodiment, it is located between the fixed mounting plate and the runner stripper plate. It may be provided at an arbitrary position between the respective plates in relation to the conditions for employing the molding die apparatus. When a shock absorber is provided on the parting line surface, the shock absorber may be attached to the movable mold plate.

In this embodiment, a typical structure of the injection mold apparatus is adopted for the sake of explanation. However, a complicated structure other than such a form can be adopted. Yes, and it is also possible to employ a cassette mold type injection molding mold apparatus.

[0049]

According to the present invention, since an oil-type shock absorber is provided for absorbing the impact between the parting line surface of the injection mold apparatus and the plates of the mold, which is likely to generate an impact, the mold is provided. Shock generated during tightening is reduced. For this reason, the generation of noise can be suppressed and the working environment can be improved, and the mold can be prevented from being damaged and the life thereof can be extended. In addition, since it is possible to prevent generation of noise and damage to the mold, it is possible to increase the moving speed of the movable mold moving forward and backward with respect to the fixed mold, thereby improving productivity. Become.

Further, by providing oil-type shock absorbers at a plurality of locations, the acting force of the shock absorbers can be arranged in a well-balanced manner, and the operation of closing and opening the mold becomes 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 cross-sectional view showing a mold opening state.

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

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

[Explanation of symbols]

P Fixed-side mold Q Movable-side mold C Cavity PL Parting line surface 1 Fixed-side mounting plate 2 Fixed-side mold plate 6 Oil-type shock absorber 6a Contact 10 Moving-side mold plate 31 Fixed-side mounting plate 32 Fixed-side mold Plate 36 Oil-type shock absorber 36a Contact 40 Movable mold plate 51 Runner stripper plate

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B29C 45/26-45/44 B29C 45/64-45/68

Claims (3)

(57) [Claims] 1. A fixed-side mold comprising 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 mold apparatus capable of forming a cavity in the parting line surface of both molds by mold clamping, wherein the fixed mold plate or the movable mold plate has During the mold clamping process, after the movable mold is moved, the two mold plates come into contact with each other.
Contact with one of the two mold plates before
And an oil-type shock absorber for absorbing an impact generated between the two mold plates. 2. A fixed mold comprising a fixed mounting plate, a runner stripper plate, and a fixed mold, and a movable mold opposed to the fixed mold. and a movable mold which is provided to be movable forward and backward, a injection mold apparatus capable of forming a cavity in the parting line face by clamping, at least the fixed side mounting plate and said fixed die plate or said the one of the movable side mold plate when the mold clamping step, after the movement of the movable die, the fixed-side mounting plate and the
The contact of the run stripper plate and the contact of the two mold plates
Before contact, make sure that the contact
Either one of the upper plate or one of the above two mold plates
While the contact or, and characterized in that the oil shock absorber to absorb the impact generated between the molds to or between opposite between the stationary side mounting plate and the runner stripper plate is provided Injection molding equipment. 3. An injection mold apparatus, wherein the shock absorber according to claim 1 or 2 is provided at a plurality of locations.