JPH09300100A - Die closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the die closing device which executes smooth clamping for a normal die and a pin gate using stripper plate without resistance, surely regulates sequence of die opening/die closing, safely takes out a formed part and is easily produced at low cost due to simple construction. SOLUTION: The device consists of a cylindrical projecting part 21 at either a moving side die plate 9 or a fixed side die plate 5 in a pin gate type die, at least one locking part in the part 21, an accommodating part at other side, in which at least one locking part is arranged, and an elastic member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold opening / closing device for a pin gate type mold.

[0002]

2. Description of the Related Art Conventionally, in a pin gate type mold, a runner is cut from a molded product by controlling the mold opening order, and the cut runner and the molded product can be automatically taken out from the mold. It is said that. This pin gate type mold is generally shown in FIGS.
A configuration as shown in 2 is known. In the figure, 6 is a stopper pin for fixing and holding the intermediate plate 4 at a predetermined position,
The fixed-side mounting plate 2 and the fixed-side template 5 are loosely fitted, and stoppers at both ends are used to prevent the fixed-side mounting plate 2 and the fixed-side mold plate 5 from opening beyond a predetermined stroke. Further, 3 is a support pin, which is planted in the fixed side mounting plate 2 and freely inserted through the intermediate plate 4 and the fixed side mold plate 5, and guides both when the mold is opened and closed. 15 is a spring, and this spring 1
By the urging force of 5, the intermediate plate 4 and the fixed-side mold plate 5 are opened first when the mold is opened, and the intermediate plate 4 and the fixed-side mold plate 5 are closed last when the mold is clamped. Is configured. The movable side mold plate 10 is fixed to the movable side mounting plate 9 via various auxiliary plates. And the core 16 and the guide pin 11 are embedded in the movable side mold plate 10,
It is freely inserted into the fixed-side mold plate 5, and constitutes a cavity surface that forms a molded product when the mold is clamped with the cavity surface formed on the fixed-side mold plate 5. The fixed-side mold plate 5 and the movable-side mold plate 10 are connected by a lock device 17, and further, the runner lock pin 18 is bored in the fixed-side mounting plate 2 and penetrates the intermediate plate 4 to reach the runner portion. The runner 19 is fixedly held. After the molding, the core pin 20 or the stripper plate 8 is configured to take out the molded product. Conventionally, the stopper pin 6 and the locking device 17 are used as the means for controlling the mold opening sequence. There are "normal type molds" that do not use the stripper plate 8 and "stripper plate type molds" that use the stripper plate 8, and the mold opening order of the normal type molds is shown in Fig. 41. As shown in FIG. 5, the mold dividing surface PL1 first starts the mold opening, and then the dividing surface PL2 or the dividing surface PL.
Ideally, 3 starts the mold opening, and the mold closing sequence is ideally that after the dividing surface PL2 and the dividing surface PL3 are closed, the dividing surface PL1 is only the biasing force of the spring 15 and is closed last without resistance. It is said that. In addition, as shown in FIG. 42, the mold opening order of the stripper plate type mold is such that the mold dividing surface PL1 starts the mold opening first, and then the dividing surfaces PL2 and PL3 perform the mold opening, The dividing plane PL4 must be opened. The mold clamping order is ideally that after the division surface PL4, the division surface PL3, and the division surface PL2 are closed, the division surface PL1 is closed only lastly by the urging force of the spring 15 without resistance, but to date, it is a stripper plate type. There was no mold opening / closing device corresponding to this mold.

[0003]

The conventional method has the following drawbacks. (1) As is well known, in recent years, at the time of molding a mold, even if a hand is accidentally caught in the mold or an object is caught, in order to prevent injury or damage to the mold, mold molding with low pressure is required. However, the conventional mold opening / closing device using the locking device has a drawback that the mold is not closed and the mold cannot be molded. (2) The mold opening / closing device using the conventional locking device is
When molding or assembling the mold, the mold will not close unless high pressure is applied to the locking device, so the mold cannot be closed smoothly, which causes the mold to shift and the locking device. It was also a cause of damage to itself and scratching and damage of parts in the mold. (3) Since the stripper plate itself moves in the pin gate type mold that uses the stripper plate, there is no mold opening / closing device that supports the use of the stripper plate until now. The mold opening / closing device is attached to the plate, and the mold opening / closing device is also attached to the stripper plate and the movable side mold plate, and it is unavoidable to install the double mold opening / closing device. If the pulling force of the opening / closing device and the mold opening / closing device of the stripper plate and the movable side mold plate are the same, the tensile force will be canceled out, and the runner will not be cut while pulling the fixed side mold plate with the movable side die block. , The stripper plate and the movable mold plate are opened while the fixed mold plate and the stripper plate are in contact with each other. As a result, the molded product remains stuck in the cavity, causing malfunction of the mold, and damage to the product part of the mold to take out the molded product and damage to the mold. I was getting tired. (4) The conventional pin-gate type mold using stripper plate has no special means to control the mold opening sequence, and it is completely uncertain from which dividing surface to start mold opening, and the normal type metal mold is used. The mold and the mold using the stripper plate had no means to control the mold closing order. As described above, the conventional members have many problems in terms of processing, cost, and service life.

The present invention has been made in view of the above-mentioned conventional drawbacks,
Even for normal type molds and pin gate type molds using stripper plates, smooth mold clamping can be performed without resistance, the mold opening and closing sequence can be reliably regulated, and molded products can be taken out safely, and the structure is The purpose of the present invention is to provide a mold opening / closing device which is simple and easy to manufacture and inexpensive.

[0005]

In order to achieve the above object, the present invention provides a pin-gate type mold having a cylindrical convex member on one of a movable side mold plate and a fixed side mold plate, and a convex member. The member is provided with at least one engaging portion, the other is provided with a housing member, the housing member is provided with at least one engaging piece, and a mold opening / closing device using an elastic member.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the embodiments of the invention shown in the drawings.

First Embodiment A first embodiment will be described with reference to FIGS. 1 to 16. FIG. 1 and FIG. 6 are perspective views showing a first embodiment, and a cylindrical convex member 21 made of metal or synthetic resin,
There is a method as shown in FIGS. 9 to 12 for providing the cylindrical support 22 on the convex member 21 and the locking portion 23 on the support 22. As shown in FIG. Providing one or a plurality of locking portions 23 with a large diameter,
The lower end of the locking portion 23 and the support 22 are formed at a right angle with a taper to form a locking surface 23A, or the support 2
2 and the locking portion 23 have the same outer diameter, and the locking surface 23A and the relief as shown in FIGS. 10 and 11 are provided between the lower end of the locking portion 23 and the column 22 to form the locking portion 23. (Also, as shown in FIG. 12, the locking portion 23 may be formed by providing a clearance with the locking surface 23A only on the surface that locks with the locking piece 27). Is formed with a taper or R, a through hole for loosely fitting the bolt 24 in the convex member 21, and a counterbore having a larger diameter than the head of the bolt 24 (or the counterbore may not be provided). , This convex member 2
1 is screwed and fixed by a bolt 24 into an appropriately arranged screw hole of either the movable side mold plate 10 or the fixed side mold plate 5.

Storage member 25 made of metal or synthetic resin
Further, a through hole for loosely fitting the bolt 39 and a counterbore having a larger diameter than the head of the bolt 39 are provided (or the counterbore may not be provided).
2 and the locking portion 23 pass through a storage hole 26 through which it can be inserted, or are provided up to an appropriate position, and the storage member 25 provided with the storage hole 26 can be locked through the locking surface 23A of the locking portion 23. The method of providing the piece 27 and the elastic member 28 is as shown in FIGS. 2 and 3, the method shown in FIGS. 4 and 5, the method shown in FIG. 7, and the method shown in FIG. (1) As shown in FIG. 2 and FIG. 3, the locking piece 27 is slidably fitted in the storage member 25, and is tapered from the tip surface 29 of the locking piece 27. A guide surface 30 is formed, and a hole 31 is loosely fitted in the elastic member 28 from one end of the locking piece 27.
Is internally provided to an appropriate position of the locking piece 27, an elastic member 28 such as a spring, a spring or urethane is fitted in the hole 31 of the locking piece 27, and the locking piece 27 is biased by the elastic member 28. Always projects into the storage hole 26. Then, a screw hole 32 is provided in the storage member 25, and a cover 33 is screwed into the storage member 25 with a bolt 34 so as to be fixed. (2) As shown in FIGS. 4 and 5, a hole 35 is formed in the storage member 25, one end of the hole 35 is opened to the outside, and the other end is opened to the storage hole 26. This hole 35
An adjusting screw 36 is screwed onto one end of the locking piece 27, while a locking piece 27 is slidably fitted to the other end of the hole 35. A guide surface 30 is provided with a taper, and an elastic member 28 such as a spring, a spring, or urethane is interposed between the locking piece 27 and the adjusting screw 36, and the locking piece is biased by the elastic member 28. Two
7 always projects from the hole 35 into the storage hole 26. (3) As shown in FIG. 7, the locking piece 27 and the guide portion 38 of the locking piece 27 are formed in the guide groove 3 in the storage member 25.
7 is slidably fitted to the locking piece 27, a guide portion 38 is formed from one end of the locking piece 27, a tip surface 29 is formed at an appropriate position of the locking piece 27, and a guide surface 30 is formed by taper. From the other end of the locking piece 27, a hole 31 loosely fitted in the elastic member 28 is provided up to an appropriate position of the locking piece 27, and an elastic member 28 such as a spring, a spring, or urethane is inserted into the hole of the locking piece 27. Fitted in 31,
Due to the biasing force of the elastic member 28, the tip end surface 29 of the locking piece 27 always projects into the accommodation hole 26. (4) As shown in FIG. 8, the hole 3 is formed in the storage member 25.
5 is formed, one end of this hole 35 is opened to the outside, and the other end is opened to the accommodation hole 26. An adjusting screw 36 is screwed into one end of the hole 35, while a locking piece 27 and a guide portion 38 of the locking piece 27 are slidable in a guide groove 37 at the other end of the hole 35. It is movably fitted and has a guide portion 38 formed by the tip surface of the locking piece 27 and a guide surface 30 formed by tapering the tip surface 29 at an appropriate position of the locking piece 27. An elastic member 28 such as a spring or a spring or urethane is interposed between the piece 27 and the adjusting screw 36, and the tip surface 29 of the locking piece 27 is urged by the elastic member 28.
Always projects from the hole 35 into the storage hole 26. The storage member 25 formed as described above is attached to the convex member 21.
The housing member 25 is screwed and fixed with a bolt 39 into an appropriately arranged screw hole of the other template on which the convex member 21 is installed, or an appropriately arranged screw hole of the other template on which the convex member 21 is installed. Alternatively, a cover member may be interposed and the storage member 25 may be fixed with bolts 39 (not shown).

In the die opening / closing device of the pin gate type die formed as described above, the fixed die block 1 is
A support pin 3 protruding from the fixed-side mounting plate 2 is freely inserted into the intermediate plate 4 and the fixed-side mold plate 5, and is constituted by a stopper pin 6 that restricts the movement of the fixed-side mold plate 5. ing. As shown in FIGS. 1 to 4, the movable die block 7 includes a movable die block 7 that does not use a stripper plate 8 (hereinafter referred to as “normal type”) and a stripper plate 8 as shown in FIGS. 5 and 6. It is composed of a movable die block 7 (hereinafter referred to as "stripper plate type") to be used. In the normal type movable die block 7, the guide pins 11 projecting from the fixed movable die plate 10 by a plurality of bolts (not shown) in the movable side mounting plate 9 are fixed side die plates 5. The movable die block 7 has an ejector pin 13 freely inserted into the movable mold plate 10 and a through hole (not shown) formed in the center of the movable mount plate 9. The end of the fixed lot from the molding machine appears in ().

The movable die block 7 of the stripper plate type has a guide pin 11 protruding from a movable die plate 10 fixed by a plurality of bolts (not shown) in a movable attachment plate 9. , The stripper plate 8 and the fixed-side mold plate 5 can be freely inserted, the movable-side die block 7 has an ejector plate 12, and the ejector pin 13 protruding from the ejector plate 12 is It is freely inserted into the movable side mold plate 10 and fixed by the bolts 14 in the stripper plate 8. The through hole (not shown) formed in the center of the movable side mounting plate 9 has a fixed lot (Fig. (Not shown)
The front is facing.

In the mold opening / closing device for the pin gate type mold having the above-mentioned structure, the movable side die block 7 is used during mold clamping.
Is moved forward, the locking portion 23 of the convex member 21
Comes into contact with the guide surface 30 of the locking piece 27, and the locking piece 27 is pulled out of the locking portion 23 against the elastic member 28, so that the locking portion 22
The locking surface 23A and the locking piece 27 are locked at a predetermined locking position without resistance, and the fixed side mold plate 5 and the intermediate plate 4 are finally closed by the urging force of the spring 15 to close the mold. In this state, when a movable die plate (not shown) of the injection molding machine moves to the left, the locking portion 23 and the locking piece 27 are still locked, and FIGS.
As shown in, the fixed-side mold plate 5 also separates from the intermediate plate 4 and moves leftward to a predetermined position, and the fixed-side mold plate 5 and the intermediate plate 4 contact the stopper pin 6 and stop. At this time, an external force equal to or more than the set value is applied, the locking portion 23 and the locking piece 27 are unlocked, and the movable die block 7 of the normal type has the fixed mold plate 5 as shown in FIG. After stopping, the mold is opened to a predetermined position, and when the mold is opened in this way, the core pin 20 projects due to the projection of the fixed lot (not shown) from the molding machine, and the molded product is fixed to the movable side mold plate 10. It is removed from the space between the side template 5.

Next, as shown in FIG. 16, the movable die block 7 of the stripper plate type mold shrinks the molded product during the cooling process during molding, so that the molded product remains attached to the core 16. The movable side template 10
The stripper plate 8 and the stripper plate 8 are kept in contact with each other, the stripper plate 8 and the fixed-side mold plate 5 are separated, the movable-side die block 7 is opened to a predetermined position, and when the mold is opened in this manner, molding is performed. The stripper plate 8 is projected by the projection of a fixed lot (not shown) from the machine, and the molded product is removed from the space between the fixed-side mold plate 5 and the stripper plate 8, and then the mold is closed again. repeat.

Since the mold opening / closing device described above can be smoothly clamped without resistance, it can be used for molding a low-pressure mold, and the structure is simple, so that the cost can be reduced. Further, it can be used as a mold opening / closing device for a normal type mold and a mold using the stripper plate 8 (the same applies to the second embodiment, the third embodiment, and the fourth embodiment). I can say that).

Second Embodiment A second embodiment will be described with reference to FIGS. 17 to 34. For convenience of explanation, the same members as those shown in the drawings of the above-described embodiment are designated by the same reference numerals, and the description thereof is omitted. 31 to 34 are perspective views showing the second embodiment, and are a cylindrical convex member 21 made of metal or synthetic resin, and a cylindrical strut 2 on the convex member 21.
2 and one or a plurality of locking portions 23 provided on the column 22, a lateral hole 40 is provided on the column 22, and a steel ball is formed in the lateral hole 40 as shown in FIGS. 17 and 18. Alternatively, as shown in FIGS. 19 to 24, the opening / closing pin 41 formed in a rectangular tube shape or a cylindrical shape is slidably fitted, and the present invention is not limited to this, and as an example, FIG. A relief portion 41A is provided at an appropriate position of the opening / closing pin 41 formed in a rectangular tube shape or a cylindrical shape as shown in FIG. Alternatively, a fixing tool 41B such as an enameled set or a ball plunger is attached and fixed at an appropriate position, and the head of the engaging portion 23 is tapered or formed with a radius R, and a guide hole 43 through which the release bar 42 can be inserted. In front It is provided so as to penetrate the convex member 21, or the guide hole 43 as shown in FIG. 20 is not provided (or the guide hole 43 and the guide portion 44 are not provided, and the shape shown in FIGS. Good),
The convex member 21 is provided with a through hole for loosely fitting the bolt 24 and a counterbore having a diameter larger than the head of the bolt 24 (or the counterbore may not be provided).
Then, the bolts 24 are screwed and fixed into the appropriately arranged screw holes of either one of the fixed side template 5 and the fixed side template 5. (In the above configuration, the method of forming the locking portion 23 on the column 22 of the convex member 21 is the same as that of the first embodiment, so the same reference numerals are given and the description thereof is omitted.)

Storage member 25 made of metal or synthetic resin
The through hole 22 through which the pillar 22 and the locking portion 23 can be inserted, or provided up to an appropriate position.
The elastic member 28 and the elastic member 28 are installed at appropriate positions in the storage member 25, and the guide portion 44 through which the release bar 42 can be inserted is provided to penetrate the storage member 25. , A through hole for loose fitting in the bolt 39 and a counterbore having a larger diameter than the head of the bolt 39 (or the counterbore may not be provided), and the storage member 25 is provided on the other side of the convex member 21. The bolts 39 are screwed into and fixed to the screw holes appropriately arranged in the template. (In the above structure, the storage member 25 has the locking piece 27 and the elastic member 28.
Since the method of forming is similar to that of the first embodiment, the same reference numerals are given and the description thereof is omitted. ) Metal or synthetic resin cylindrical release bar 42
The release bar 42 has a holding surface 45 and a release surface 46.
As a method of forming a tapered surface 47 by tapering over and forming the insertion portion 48 by tapering the tip of the release bar 42 or R, there is a method as shown in FIGS. 26 to 30, (1) As shown in FIGS. 26 and 27, the release bar 42 is provided with a loosely fitting groove 65 in the opening / closing pin 41.
A through hole for loosely fitting the bolt 67 and a counterbore having a larger diameter than the head of the bolt 67 are provided in the groove 67 at an appropriate position of the release bar 42 whose bottom surface is the holding surface 45.
The removable insertion piece 66 has a taper surface 47 formed by taper with the release surface 46, and the insertion portion 48 is formed by taper or R formed with a screw hole from the back surface of the insertion piece 66. 66 is fitted into the release bar 42, and is fixed by being screwed into the screw hole of the insert piece 66 with the bolt 67. (2) As shown in FIG. 28, the release bar 42 is provided with a loosely fitting groove 65 in the opening / closing pin 41, and the bottom surface of this groove 65 is used as a holding surface 45, and a screw hole 68 is provided at the tip of this groove 65. The release bar 42 is screwed into the threaded hole 68 of the release bar 42 with a taper surface 47 formed by taper with the release surface 46, and a screw 69 of the insert piece 66 formed by tapering the tip or R. Fixing (3) As shown in FIG. 29, the release bar 42 is provided with a recess to form a holding surface 45, and a taper surface 47 is provided between the holding surface 45 and the release surface 46 by a taper. An insertion portion 48 is formed by tapering the tip of 42 or R. (4) As shown in FIG. 30, the opening / closing pin 41 is provided with a loosely fitting groove 65 up to an appropriate position of the release bar 42, and the bottom surface of the groove 65 serves as a holding surface 45, and the holding surface 45 and the release surface. The tip of the release bar 42 having the tapered surface 47 is tapered by 46, or the insertion portion 48 is formed by R. A bolt 49 is attached to the release bar 42 configured as described above.
A through hole or a screw hole 50 for loose fitting is provided, and the release bar 42 is screwed and fixed to the screw hole 50 with a bolt 49 at an appropriate position of the intermediate plate 4 or the fixed side mounting plate 2, or FIG. As shown in FIG. 22, the accommodation member 51 is provided with a counterbore 52 to be fitted with the release bar 42, and further, a back hole of the accommodation member 51 is provided with a counterbored hole 53 loosely fitted to a bolt through the counterbore 52. A recess 54 having a larger diameter than the head of the bolt 49 is provided from the rear surface of the fool hole 53, the release bar 42 is fitted into the counterbore 52 of the accommodating member 51, and the release bar 42 is screwed and fixed to the screw hole 50 with the bolt 49. ,, the intermediate plate 4 or the fixed-side mounting plate 2 may be fixed at appropriate positions with bolts. "In addition, the cylindrical convex member 21 and the cylindrical support column 22 are usually cylindrical or conical cylindrical, but may be rectangular or triangular. Third embodiment
The same can be said for the embodiment of the present invention and the fourth embodiment of the present invention. Further, the cylindrical release bar 42 is also usually cylindrical or conical, but it is rectangular or triangular. It may be formed into a tubular shape (the same applies to the third and fourth embodiments).

In the mold opening / closing device for the pin gate type mold having the above-mentioned structure, the movable side die block 7 is used during mold clamping.
When is moved forward, the release bar 42 is fitted and inserted into the guide hole 43 of the convex member 21 and the guide portion 44 of the housing member 25 in the middle thereof, and the locking portion 23 of the convex member 21 becomes the guide surface 30 of the locking piece 27. Upon contact, the locking piece 27 is pulled out of the locking portion 23 against the elastic member 28, and the locking surface 23A of the locking portion 23,
The locking piece 27 is locked at a predetermined locking position without resistance, and the fixed side mold plate 5 and the intermediate plate 4 are finally closed by the biasing force of the spring 15 to close the mold. In this state, the movable die plate (not shown) of the injection molding machine moves to the left, and when it is opened, the locking portion 23 and the locking piece 27 are still locked, and the fixed side template 5 is also in the middle. When separated from the plate 4 and moved to the left to a predetermined position, as shown in FIG.
As shown by, the opening / closing pin 41 moves from the holding surface 45 of the release bar 42 to the release surface 46, the opening / closing pin 41 is pushed by the release bar 42, the locking piece 27 is also interlocked, and the locking piece 27 engages. After moving to the outside of the stopper 23, the engagement between the engagement portion 23 and the engagement piece 27 is released, and the movable die block 7 of the normal type is released.
Is opened to a predetermined position even after the stationary mold plate 5 is stopped, and when the mold is opened in this way, the core pin 20 projects due to the projection of the fixed lot (not shown) from the molding machine, The article is removed from the space between the movable mold plate 10 and the fixed mold plate 5.

Next, in the movable side die block 7 of the stripper plate type mold, since the molded product shrinks due to the cooling process during molding, the molded product remains attached to the core 16, and the movable side mold plate 10 is kept. And the stripper plate 8 are kept in contact with each other, the stripper plate 8 and the fixed-side mold plate 5 are separated, the movable-side die block 7 is opened to a predetermined position, and when the mold is opened in this way, the molding machine is opened. The stripper plate 8 is projected by a fixed lot (not shown) protruding from the
Is removed from the space between the stripper plate 8 and the stripper plate 8, after which the mold is closed again and this is repeated.

The mold opening / closing device described above. Regardless of whether the mold is a normal type or a mold using the stripper plate 8, the mold opening and mold closing order can be regulated with certainty (the first embodiment, the third embodiment, and the fourth embodiment). The same can be said in).

Third Embodiment A third embodiment will be described with reference to FIGS. 35 to 38. For convenience of explanation, the same members as those shown in the drawings of the above-described embodiment are designated by the same reference numerals, and the description thereof is omitted. As shown in FIGS. 35 to 37, a base member 55 made of metal or synthetic resin is fitted to the cylindrical convex member 21 on the base member 55, or as shown in FIG. An accommodating portion 57 that fits with the protruding portion 56 is provided, and a small-diameter bolt hole 58 is provided so as to penetrate from the accommodating portion 57 to the back surface of the base member 55. Member 21
The bolts 58 are loosely fitted in the screw holes 64 provided on the back surface of the bolts 58 and are fixed to the convex member 21 by the cylindrical support 22.
And one or a plurality of locking portions 23 are provided on the column 22, a lateral hole 40 is further provided on the column 22, and an opening / closing pin 41 is attached to the lateral hole 40 to taper the head of the column. , Or R, release bar 42
Is provided with a guide hole 43 through which the base member 55
The bolt 24 is provided with a through hole for loose fitting and a counterbore having a diameter larger than that of the head of the bolt 24 (or the counterbore may not be provided), and the base member 55 is provided between the movable side mold plate 10 and the fixed side mold plate 5. The bolt 24 is screwed into and fixed to either one of the appropriately arranged screw holes. (In the above configuration,
The method of forming the locking portion 23 on the column 22 of the convex member 21 is
The method is the same as in the first and second embodiments, and the method of installing the opening / closing pin 41 on the column 22 is the same as that in the second embodiment. Omit it. )

Storage member 25 made of metal or synthetic resin
The through hole 22 through which the pillar 22 and the locking portion 23 can be inserted, or provided up to an appropriate position.
7 and the elastic member 28 are installed at appropriate positions in the storage member 25, and a guide portion 44 through which the release bar 42 can be inserted is provided so as to penetrate the storage member 25, and the storage member 25 formed as described above. Is provided with a through hole loosely fitted to the bolt 39 and a counterbore having a diameter larger than that of the head of the bolt 39 (or the counterbore may not be provided). The bolts 39 are screwed into and fixed to the screw holes of the template which are appropriately arranged. (In the above configuration, the method of forming the locking piece 27 and the elastic member 28 in the storage member 25 is the same as in the first and second embodiments, so the same reference numerals are given and the description thereof is omitted. The cylindrical release bar 42 made of metal or synthetic resin is omitted.
Then, a holding surface 45 is formed on the release bar 42, and a taper surface 47 is formed between the holding surface 45 and the release surface 46 by taper. The tip of the release bar 42 is tapered or the insertion portion 48 is formed by R. The release bar 42 is provided with a through hole or a screw hole for loosely fitting the bolt 49, and the release bar 42 is screwed with the bolt 49 at an appropriate position of the intermediate plate 4 or the fixed side mounting plate 2. Secure by screwing. (In the above configuration, the structure for forming the release bar 42 and the method for attaching the release bar 42 to the intermediate plate 4 or the fixed side attachment plate 2 are the same as those in the second embodiment, and therefore, the same reference numerals are given, The description is omitted.)

In the mold opening / closing device of the pin gate type mold having the above-mentioned structure, the movable side die block 7 is clamped at the time of mold clamping.
The forward release of the release bar 42 to the guide hole 43 of the convex member 21 and the guide portion 44 of the storage member 25 during the forward movement of
The engaging portion 23 of the convex member 21 abuts on the guide surface 30 of the engaging piece 27, and the engaging piece 27 is pulled out of the engaging portion 23 against the elastic member 28. Locking surface 23A of
The locking piece 27 is locked at a predetermined locking position without resistance, and the fixed side mold plate 5 and the intermediate plate 4 are finally closed by the biasing force of the spring 15 to close the mold. In this state, the movable die plate (not shown) of the injection molding machine moves to the left, and when it is opened, the locking portion 23 and the locking piece 27 are still locked, and the fixed side template 5 is also in the middle. When separated from the plate 4 and moved leftward to a predetermined position, the opening / closing pin 41 moves the holding surface 45 of the release bar 42 to the release surface 46.
And the opening / closing pin 41 is pushed by the release bar 42,
The locking piece 27 is also interlocked, the locking piece 27 moves to the outside of the locking portion 23, the locking of the locking portion 23 and the locking piece 27 is released, and the movable die block 7 of the normal type is the fixed side die. Even after the plate 5 is stopped, it is opened to a predetermined position, and when the mold is opened in this way, the core pin 20 is projected by the projection of the fixed lot (not shown) from the molding machine, and the molded product is the movable side mold plate. It is removed from the space between 10 and the stationary template 5.

Next, in the movable die block 7 of the stripper plate type mold, since the molded product shrinks due to the cooling process during molding, the molded product remains attached to the core 16 and the movable mold plate 10 is kept. And the stripper plate 8 are kept in contact with each other, the stripper plate 8 and the fixed-side mold plate 5 are separated, the movable-side die block 7 is opened to a predetermined position, and when the mold is opened in this way, the molding machine is opened. The stripper plate 8 is projected by a fixed lot (not shown) protruding from the
Is removed from the space between the stripper plate 8 and the stripper plate 8, after which the mold is closed again and this is repeated.

In the mold opening / closing device described above, only the convex member 21 can be easily attached and detached, and only by changing the convex member 21, a normal type mold or a mold using the stripper plate 8 can be molded. It can be used as a mold opening / closing device (the same applies to the fourth embodiment).

Fourth Embodiment A fourth embodiment will be described with reference to FIGS. 39 and 40. For convenience of explanation, the same members as those shown in the drawings of the above-described embodiment are designated by the same reference numerals, and the description thereof is omitted. As shown in FIGS. 39 and 40, a base member 55 made of metal or synthetic resin, and an accommodating portion 57 are provided in the base member 55, and a smaller diameter is provided on the back surface of the base member 55 than the accommodating portion 57. Bolt hole 5
8 is provided through the intermediate joint 60, and the intermediate joint 60 is provided with a convex portion 61 that fits into the accommodating portion 57 and a loose hole 62 that loosely fits into the bolt 59. A concave portion 63 that fits into the protruding portion 56 of the convex member 21 is provided on the head of the convex member 21, and the convex member 21 and the protruding portion 56 and the screw hole 64 are provided on the back surface of the convex member 21. 56 to the recess 6 of the intermediate joint 60
3, the convex portion 61 of the intermediate joint 60, into which the convex member 21 is fitted, is fitted into the accommodating portion 57 of the base member 55, and is screwed into the screw hole 64 of the convex member 21 by the bolt 59, and the base member 55 is inserted. The convex member 21 to the intermediate joint 60
And a cylindrical column 22 on the convex member 21,
One or a plurality of locking portions 23 on the support 22
Further, a lateral hole 40 is provided in the support column 22, an opening / closing pin 41 is attached to the lateral hole 40, and the head portion of the locking portion 23 is tapered or formed with a radius R.
2 is provided with a guide hole 43 through which the base member 5 can be inserted.
5, a through hole for loosely fitting the bolt 24, and a counterbore having a larger diameter than the head of the bolt 24 are provided (or the counterbore may not be provided), and the base member 55 is provided on the movable side mold plate 10 and the fixed side mold plate. 5 is fixed by screwing into any one of the appropriately arranged screw holes. (In the above configuration, the method of forming the locking portion 23 on the column 22 of the convex member 21 and the method of installing the opening / closing pin 41 on the column 22 are the same as those in the second and third embodiments. , The same reference numerals are given, and the description thereof is omitted.) "In addition, although the tubular intermediate joint 60 is usually a cylindrical or conical tubular shape, a square tubular shape, a triangular tubular shape, or the like. You can do that. "

Storage member 25 made of metal or synthetic resin
The through hole 22 through which the pillar 22 and the locking portion 23 can be inserted, or provided up to an appropriate position.
The elastic member 28 and the elastic member 28 are installed at appropriate positions in the storage member 25, and the guide portion 44 through which the release bar 42 can be inserted is provided to penetrate the storage member 25. , A through hole that is loosely fitted to the bolt 39 and a counterbore having a diameter larger than the head of the bolt 39 (or the counterbore may not be provided), and the storage member 25 is provided on the other side where the base member 55 is installed. The bolts 39 are screwed into and fixed to the screw holes appropriately arranged in the template. (In the above configuration, the method of forming the locking piece 27 and the elastic member 28 in the storage member 25 is the same as in the first embodiment, the second embodiment, and the third embodiment, so the same reference numerals are used. , And a description thereof is omitted.) Cylindrical release bar 42 made of metal or synthetic resin
Then, a holding surface 45 is formed on the release bar 42, and a taper surface 47 is formed between the holding surface 45 and the release surface 46 by taper. The tip of the release bar 42 is tapered or the insertion portion 48 is formed by R. The release bar 42 is formed with a through hole or a screw hole for loosely fitting the bolt 49, and the release bar 42 is screwed with the bolt 49 at an appropriate position of the intermediate plate 4 or the fixed side mounting plate 2. Secure by screwing into the hole. (In the above configuration, the structure of forming the release bar 42 and the method of attaching the release bar 42 to the intermediate plate 4 or the fixed side attachment plate 2 are the same as those in the second and third embodiments, The same reference numerals are given and the description thereof is omitted.)

In the mold opening / closing device for the pin gate type mold having the above-mentioned structure, the movable side die block 7 is used during mold clamping.
The forward release of the release bar 42 to the guide hole 43 of the convex member 21 and the guide portion 44 of the storage member 25 during the forward movement of
The engaging portion 23 of the convex member 21 abuts on the guide surface 30 of the engaging piece 27, and the engaging piece 27 is pulled out of the engaging portion 23 against the elastic member 28. Locking surface 23A of
The locking piece 27 is locked at a predetermined locking position without resistance, and the fixed side mold plate 5 and the intermediate plate 4 are finally closed by the biasing force of the spring 15 to close the mold. In this state, the movable die plate (not shown) of the injection molding machine moves to the left, and when it is opened, the locking portion 23 and the locking piece 27 are still locked, and the fixed side template 5 is also in the middle. When separated from the plate 4 and moved leftward to a predetermined position, the opening / closing pin 41 moves the holding surface 45 of the release bar 42 to the release surface 46.
And the opening / closing pin 41 is pushed by the release bar 42,
The locking piece 27 is also interlocked, the locking piece 27 moves to the outside of the locking portion 23, the locking of the locking portion 23 and the locking piece 27 is released, and the movable side die block 7 of the stripper plate type mold is ,
Since the molded product shrinks due to the cooling process during molding, the molded product remains attached to the core 16, and the movable side mold plate 10 and the stripper plate 8 remain in contact with each other and fixed to the stripper plate 8. The side mold plate 5 is separated, the movable die block 7 is opened to a predetermined position, and when the mold is opened in this way, the stripper plate 8 is projected by the projection of the fixed lot (not shown) from the molding machine, Molded parts are fixed mold plate 5 and stripper plate 8
It is removed from the space between and then the mold is closed again and this is repeated.

In the mold opening / closing device described above, the convex member 21 and the intermediate joint 60 can be easily attached / detached, and by providing the intermediate joint 60, the molds corresponding to the thicknesses of various stripper plates 8 can be obtained. It can be used as a switchgear.

[0028]

As is clear from the above description, the present invention has the following effects. . (1) Since there is no resistance of the mold opening / closing device, smooth mold clamping can be performed. (2) Since the mold opening and closing device can perform smooth mold clamping without resistance, it can be used for mold molding with low pressure. (3) The mold opening / closing device can perform smooth mold clamping without resistance, so that the mold does not shift.
There is no damage to the internal parts due to scoring, damage to the mold, and damage to the switchgear. (4) It can be safely used as a mold opening / closing device for a normal type mold and a mold using a stripper plate. (5) It can be used as a mold opening / closing device which does not require a double opening / closing device to be attached to a mold using a stripper plate. (6) It can be used as a mold opening / closing device that regulates the order of mold opening and mold closing reliably even for a normal type mold and a mold using a stripper plate. (7) By using the mold opening / closing device, mold opening and mold closing can be regulated with certainty, so there is no trouble such as malfunction of the mold or damage to the mold during molding, and it is safe. The molded product can be taken out. (8) Since the structure is simple, it can be manufactured easily and at low cost. (9) Since the convex member can be easily attached and detached, it is easy to assemble, and moreover, simply by exchanging the convex member and without changing other parts, a normal type mold or a metal stripper plate is used. The mold can be easily assembled and used as a mold opening / closing device. (10) The convex member and the intermediate joint can be easily attached and detached, the assembly is easy, and by using the intermediate joint, it can be used as a mold opening / closing device according to a wide variety of stripper plate thicknesses. it can.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a partially sectional front view showing the first embodiment of the present invention.

FIG. 3 is a partially cross-sectional front view showing the first embodiment of the present invention.

FIG. 4 is a partially sectional front view showing the first embodiment of the present invention.

FIG. 5 is a partially sectional front view showing the first embodiment of the present invention.

FIG. 6 is a perspective view showing the first embodiment of the present invention.

FIG. 7 is a sectional view showing a first embodiment of the present invention.

FIG. 8 is a cross-sectional view showing the first embodiment of the present invention.

FIG. 9 is a perspective view showing the first embodiment of the present invention.

FIG. 10 is a perspective view showing the first embodiment of the present invention.

FIG. 11 is a perspective view showing a first embodiment of the present invention.

FIG. 12 is a perspective view showing a first embodiment of the present invention.

FIG. 13 is a cross-sectional view showing an operating mode of the first embodiment of the present invention.

FIG. 14 is a sectional view showing an operation mode of the first embodiment of the present invention.

FIG. 15 is a cross-sectional view showing an operating mode of the first embodiment of the present invention.

FIG. 16 is a sectional view showing an operating mode of the first embodiment of the present invention.

FIG. 17 is a partially sectional front view showing a second embodiment of the present invention.

FIG. 18 is a partially sectional front view showing a second embodiment of the present invention.

FIG. 19 is a partially sectional front view showing a second embodiment of the present invention.

FIG. 20 is a partially sectional front view showing a second embodiment of the present invention.

FIG. 21 is a partially sectional front view showing a second embodiment of the present invention.

FIG. 22 is a partially sectional front view showing a second embodiment of the present invention.

FIG. 23 is a partially sectional front view showing a second embodiment of the present invention.

FIG. 24 is a partially sectional front view showing a second embodiment of the present invention.

FIG. 25 is a perspective view showing a second embodiment of the present invention.

FIG. 26 is a perspective view showing a second embodiment of the present invention.

FIG. 27 is a perspective view showing a second embodiment of the present invention.

FIG. 28 is a perspective view showing a second embodiment of the present invention.

FIG. 29 is a perspective view showing a second embodiment of the present invention.

FIG. 30 is a perspective view showing a second embodiment of the present invention.

FIG. 31 is a perspective view showing a second embodiment of the present invention.

FIG. 32 is a perspective view showing a second embodiment of the present invention.

FIG. 33 is a perspective view showing a second embodiment of the present invention.

FIG. 34 is a perspective view showing a second embodiment of the present invention.

FIG. 35 is a partially sectional front view showing a third embodiment of the present invention.

FIG. 36 is a partially sectional front view showing a third embodiment of the present invention.

FIG. 37 is a partially sectional front view showing a third embodiment of the present invention.

FIG. 38 is a partially sectional front view showing a third embodiment of the present invention.

FIG. 39 is a partially sectional front view showing a fourth embodiment of the present invention.

FIG. 40 is a partially sectional front view showing a fourth embodiment of the present invention.

FIG. 41 is a cross-sectional view having a conventional mold opening / closing device.

FIG. 42 is a cross-sectional view having a conventional mold opening / closing device.

[Explanation of symbols]

1: Fixed side die block, 2: Fixed side mounting plate,
3: Support pin, 4: Intermediate plate,
5: Fixed side mold plate, 6: Stopper pin, 7: Movable side die block, 8: Stripper plate, 9: Movable side mounting plate, 10:
Movable mold plate, 11: guide pin, 12:
Ejector plate, 13: ejector pin,
14: Bolt, 15: Spring, 1
6: core, 17: locking device, 18: runner lock pin, 19: runner,
20: core pin, 21: convex member, 2
2: Support, 23: Locking part, 23A:
Locking surface, 24: Bolt, 25: Storage member, 26: Storage hole, 27: Locking piece, 28: Elastic member, 29: Tip surface,
30: guide surface, 31: hole, 32: screw hole, 33: cover, 34: bolt, 35: hole, 36: adjusting screw,
37: guide groove, 38: guide part,
39: bolt, 40: lateral hole,
41: open / close pin, 41A: relief part,
41B: Fixture, 42: Release bar,
43: guide hole, 44: guide part,
45: holding surface, 46: release surface, 4
7: tapered surface, 48: insertion part, 4
9: Bolt, 50: Screw hole, 51:
Housing member, 52: Counterbore, 53: Stupid hole, 54: Recessed portion, 55: Base member, 56: Projection portion, 57: Housing portion, 58: Bolt hole, 59: Bolt,
60: intermediate joint, 61: convex portion, 62:
Stupid hole, 63: concave part, 64: screw hole, 65: groove, 66: insert piece,
67: bolt, 68: screw hole,
69: screw.

Claims (4)

[Claims] 1. A tubular convex member on one of the movable side mold plate and the fixed side mold plate, at least one locking portion provided on the convex member, and a storage member on the other side, and this storage member. A mold opening / closing device, characterized in that at least one locking piece and an elastic member are provided on the. 2. A tubular convex member on one of the movable side mold plate and the fixed side mold plate, at least one locking portion and an opening / closing pin provided on this convex member, and a storage member on the other side. A mold opening / closing device, characterized in that at least one locking piece and an elastic member are provided in this storage member, and a release bar is provided from an intermediate plate or a fixed side mounting plate. 3. A base member on one of the movable side mold plate and the fixed side mold plate, and a convex member is detachably provided on the base member, and at least one engaging portion and an opening / closing pin are provided on the convex member. And a storage member on the other side, at least one locking piece on this storage member, and an elastic member, and an intermediate plate,
Alternatively, the mold opening / closing device is characterized in that a release bar is provided from the fixed side mounting plate. 4. A base member on one of a movable side mold plate and a fixed side mold plate, and an intermediate joint and a convex member are detachably provided on the base member, and at least one locking portion is provided on the convex member. And an opening / closing pin are provided, a storage member is provided on the other side, at least one locking piece and an elastic member are provided on the storage member, and a release bar is provided from the intermediate plate or the fixed side mounting plate. Mold opening and closing device.