JP2871663B2 - Mold and mold opening and closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold and a mold opening / closing apparatus such as a mold using a pin gate type mold, a stripper plate, and a mold using a slide core, in which the fixed side mounting plate and the fixed mold are separated when the mold is opened. About.

[0002]

2. Description of the Related Art Conventionally, as a method of molding a mold for injection molding, a large amount of injection pressure is applied to the mold so that the mold is not opened by the clamping force of the molding machine. The conventional pin gate type mold has a configuration in which the runner is cut from the molded product by regulating the mold opening order, and the cut runner and the molded product can be automatically taken out from the mold. . This pin gate type mold generally has a structure as shown in FIGS. 52 to 54, in which the intermediate plate 4 is fixedly held at a predetermined position by a stopper pin 6, and the fixed side mounting plate 2 is fixed.
The stoppers 6A and 6B at both ends restrict the fixed-side mounting plate 2 and the fixed mold 5 from opening more than a predetermined stroke. Also, the support pins 3 are implanted in the fixed-side mounting plate 2 and freely inserted into the intermediate plate 4 and the fixed mold 5, guide the two when the mold is opened and closed, and press the mold by the urging force of the spring 15. At the time of opening, the intermediate plate 4 and the fixed mold 5 are configured to be separated first.

The movable mold 10 is fixed to the movable mounting plate 9 via various auxiliary plates. A core 16 and a guide pin 11 are buried in the movable mold 10, are freely inserted into the fixed mold 5, and have a cavity surface formed on the fixed mold 5 and a cavity portion for forming a molded product 70 when the mold is clamped. Is configured. The fixed mold 5 and the movable mold 10 are connected by a lock device 17 which separates the movable mold 10 with an external pressure equal to or higher than a set value. It reaches 19 parts, and after molding, the runner 19 is fixedly held. Then, while the runner 19 is fixedly held on the runner lock pin 18, the molded product 70 contracts due to a cooling process at the time of molding, so that the molded product 70 is attached so as to hold the core 16. Further, the runner 19 and the molded product 70 adhere to the fixed mold 5 with little adhesion strength due to the draft formed between them, and the molded product 70 adheres to the core 16 after molding. The molded product 70 is taken out by the core pin 20 or the stripper plate 8 projecting. Conventionally, a stopper pin 6 and a lock device 17 have been used as means for regulating the mold opening order.

There are two types of pin gate type dies: a normal type dies not using the stripper plate 8 and a stripper plate type dies using the stripper plate 8. The order of opening the normal type dies is shown in FIG.
As shown in FIG. 53 and FIG. 53, when the mold opening process is started, the biasing force of the spring 15 causes the division plane PL1 which is the joining surface between the fixed mold 5 and the intermediate plate 4 to start mold opening first. Here, the runner 19 is the runner lock pin 1
8, the molded product 70 is contracted by the cooling process at the time of molding, absorbed by the core 16 and moved together with the movable mold 10, and the runner 19 and the molded product 70 are cut and separated from the gate portion. When the mold opening further proceeds, the fixed mold 5
When the bottom of the stopper pin 6 contacts the stopper surface 6A at one end of the stopper pin 6, the intermediate plate 4 also starts to move and
When L2 is opened, the runner 19 and the spool are blown out of the mold, and the stopper surfaces 6A and 6B at both ends of the stopper pin 6 abut on both surfaces of the fixed mold 5 and the fixed-side mounting plate 2, thereby fixing the mold. 5 and the intermediate plate 4 stop. At this time, an impact force equal to or greater than the set value of the lock device 17 is applied to the stopper surfaces 6A and 6B, and the impact causes the lock device 1 to move.
7 is released, the split surface PL3, which is the joining surface of the fixed mold 5 and the movable mold 10, is separated, the movable die block 7 is opened to a predetermined position, and a fixed lot (shown in FIG. 3), the ejector plate 12 is protruded, so that the core pin 20 protrudes and the molded product 70 is
6 protrudes out of the mold. As a mold clamping method, it is ideal that the division plane PL2 and the division plane PL3 are closed without resistance, and the division plane PL1 is closed with resistance only by the urging force of the spring 15, but the conventional lock device 17 opens the mold. Similarly, since there is resistance during mold clamping, the mold is clamped at high pressure.

Next, as shown in FIG. 54, when the mold opening process is started, the fixed mold 5 and the intermediate plate 4 are joined by the urging force of the spring 15 as shown in FIG. The division plane PL1, which is the plane, starts opening the mold first. Here, the runner 19 is held by the runner lock pin 18, and the molded product 70 is contracted by a cooling process at the time of molding, remains in a state of sticking to the core 16, moves together with the movable mold 10, and
And the molded product 70 are cut and separated from the gate portion. When the mold opening further proceeds, if the bottom of the fixed mold 5 abuts against the stopper surface 6A at one end of the stopper pin 6, the intermediate plate 4 also starts to move, and when the divided surface PL2 opens, the runner 1 is opened.
9 and the spool are removed from the mold, and the fixed mold 5 is removed.
The stopper surfaces 6A and 6B at both ends of the stopper pin 6 abut on both surfaces of the fixed-side mounting plate 2 and the stationary mold 5 and the intermediate plate 4 stop. At this time, an impact force equal to or greater than the set value of the locking device a17A is applied to the stopper surfaces 6A and 6B, and the locking device a17A is unlocked by the impact, and the dividing surface PL3 which is a joining surface between the fixed mold 5 and the stripper plate 8 is provided. Is separated to open the movable die block 7 to a predetermined position, a force is applied to the ejector plate 12 by a fixed lot (not shown) from the molding machine, and the ejector plate 12 is buried in the ejector plate 12 so that the movable mold 10 can freely move. The ejector pins 13 inserted through the ejector pins 13 are connected to the ejector pins 13 by connecting members 14, and are freely inserted into the guide pins 11, so that the stripper plate 8 formed to taper with the core 16 projects. As a result, a force equal to or greater than the set value is applied to the lock device b, the lock device b17B is released, and the molded product 0 is protruded from the core 16 to the outside of the mold.

[0006] The mold opening sequence of the stripper plate type mold is such that the split surface PL1 which is the joining surface of the fixed mold 5 and the intermediate plate 4 starts mold opening first, and then the intermediate plate 4 and the fixed side mounting plate. Division plane PL2 which is the joint plane of No. 2
After the split surface PL3, which is the joining surface between the fixed mold 5 and the stripper plate 8, opens the mold, the dividing surface PL4, which is the joining surface between the stripper plate 8 and the movable mold 10, must be opened. As described above, since the stripper plate 8 itself can be freely moved, the lock device a17A of the division surface PL3 and the lock device b17B of the division surface PL4 can be separated by an external pressure equal to or higher than the set value as in the above-described conventional configuration. Was connected. The mold clamping method includes dividing plane PL4, dividing plane PL3, and dividing plane PL.
Ideally, 2 is closed without resistance, and the dividing plane PL1 is closed with resistance of only the urging force of the spring 15, but the conventional lock device a17A and the lock device have resistance when closing the mold as well as opening the mold. The mold was clamped by applying high pressure.

Next, there are two types of dies that separate the fixed die from the fixed-side mounting plate of the dies other than the pin gate type dies. The dies use a slide core and the dies do not use a slide core. Since the mold opening order and the mold clamping method are the same in both cases, the description will be duplicated. Therefore, only the mold using the slide core will be described, and the description of the mold not using the slide core will be omitted. As a mold in which the fixed-side mounting plate 2 of the mold using the slide core 71 and the fixed mold 5 are separated, a configuration as shown in FIGS. 55 to 58 is generally known. It is planted on the fixed side mounting plate 2 with the support pin 3,
The stop surface 3 is freely inserted through the fixed mold 5, guides the two when the mold is opened and closed, and has one end connected by a bolt.
At A, the fixed side mounting plate 2 and the fixed mold 5 are regulated so as not to open more than a predetermined stroke. The slide core 71 slidably mounted on the fixed mold 5 is mainly used for undercut processing, and the locking block 72 fixed and held by the fixed side mounting plate 2.
Thereby, the slide core 71 is fixed at a predetermined position during molding. When the mold is opened and closed, the hole 74 of the slide core 71 is opened.
An angular pin 73 is obliquely implanted in the fixed-side mounting plate 2 as a guide for freely moving the slide core 71 to a predetermined position, and fixed by the biasing force of the spring 15 when the mold is opened by the spring 15. It is configured such that the side mounting plate 2 and the fixed mold 5 can be separated to a predetermined position. The movable mold 10 is fixed to the movable-side mounting plate 9 via various auxiliary plates. The movable mold 10 has a core 1
6 and a guide pin 11 are buried, freely inserted into the fixed mold 5, and form a cavity portion that forms a molded article 70 when the mold is clamped with the cavity surface formed on the fixed mold 5. The molded article 70 is attached so as to hold the core 16 because the molded article 70 shrinks in a cooling step during molding. Further, the molded article 70 is adhered to the fixed mold 5 with almost no adhesive strength due to the draft formed therebetween, and after molding, the molded article 70 remains attached to the core 16. The molded product 70 is taken out by projecting the core pin 20 or the stripper plate 8. Conventionally, there is no special means for regulating the opening order, and the opening order is regulated by the biasing force of the spring 15.

The fixed side mounting plate 2 of the die using the slide core 71 and the die separated from the fixed die 5 are also a normal type die that does not use the stripper plate 8, and a stripper plate that uses the stripper plate 8. The mold opening order of the fixed side mounting plate 2 and the fixed mold 5 using the slide core 71 of the normal mold is always the fixed mold 5 and the movable mold 10. The fixed mold 5 and the fixed-side mounting plate 2 must be opened to a predetermined position in a state where they are in close contact with each other.
As shown in FIG. 56 and FIG. 56, when the mold opening step is started, the biasing force of the spring 15 causes the division plane PL1, which is the joining surface between the fixed mold 5 and the fixed-side mounting plate 2, to start opening the mold first. And slide core 71 and locking block 7
The slide core 71 also moves and stops at a predetermined position with the movement of the angular pin 73. When the mold opening further proceeds, the bottom of the fixed mold 5 is
Abuts the stop surface 3A at one end, and the fixed mold 5 stops.
Then, the split surface PL3, which is the joining surface between the fixed mold 5 and the movable mold 10, is separated and opened, and the spool and the runner 19 are pulled by the under part 75 of the movable mold 10 to move the movable mold 1
The molded product 70 is shrunk by the cooling process during molding, remains in the state of being adhered to the core 16, and moves to a predetermined position together with the movable die block 7. Then, by ejecting the ejector plate 12 by a fixed lot (not shown) from the molding machine,
The core pin 20 protrudes, and the spool, the runner 19 and the molded product 70 protrude out of the mold.

In addition, the mold opening order of the fixed side mounting plate 2 of the mold using the slide core 71 of the stripper plate type mold and the fixed mold 5 is always the same as the fixed mold 5.
Plane PL3, which is the joint surface between the plate and stripper plate 8
The fixed mold 5 is kept in a state in which the division surface PL4, which is the joining surface between the stripper plate 8 and the movable mold 10, is kept in close contact.
The dividing plane PL1, which is the joining surface between the fixed mounting plate 2 and the fixed side mounting plate 2, must be opened to a predetermined position. Then, the dividing plane PL3
After starting the mold opening and opening the mold to the predetermined position,
The dividing plane PL4 must be opened. In the conventional method, when the mold opening process is started as shown in FIGS. 57 and 58, the urging force of the spring 15 causes the dividing plane PL to be opened.
1 starts the mold opening first, the slide core 71 and the locking block 72 are also separated, and the slide core 71 moves with the movement of the angular pin 73 and stops at a predetermined position. Then, the bottom of the fixed mold 5 comes into contact with the stop surface 3A at one end of the support pin 3 and stops. Then, the dividing plane PL3 is separated and opened, and the spool and the runner 19 are pierced from the movable mold 10, held by the runner lock pin 18 penetrating through the stripper plate 8, and stuck to the stripper plate 8, thereby forming a molded product. 70 also shrinks due to the cooling process during molding,
The movable die block 7 is moved to a predetermined position together with the movable die block 7 while remaining attached to the core 16. By ejecting the ejector plate 12 by a fixed lot (not shown) from the molding machine, the ejector pin 13 buried in the ejector plate 12 and freely inserted through the movable mold 10 is ejected. The stripper plate 8 is connected to the pin 13 by the connecting member 14 and freely inserted into the guide pin 11, and the stripper plate 8 formed to be tapered with the core 16 is projected, and the spool, the runner 19 and the molded product 70 are removed from the mold. It is projected to.

[0010]

The conventional method has the following drawbacks. (1) As is well known, in injection molding, a large pressure is applied to a mold by an injection pressure, and a mold that cannot be dealt with only by a mold clamping force applied to the mold by a molding machine is an injection generated during the injection. The pressure caused the mold to open, which caused burrs on the molded product, which made it very difficult to remove the burrs, and the molded product often did not become a product. (2) In recent years, in order to prevent injuries and damage to the mold even if the hand is mistakenly pinched or the object is pinched during the molding of the mold, mold clamping to the mold by low pressure has been performed. And
A mold opening / closing device using a conventional lock device has a drawback that the mold cannot be tightened and molding cannot be performed because it hinders safety detection. (3) A mold opening / closing device using a conventional lock device cannot smoothly close the mold because the mold does not close unless high pressure is applied to the lock device during molding or mold assembly. As a result, the mold may be displaced, the locking device itself may be damaged, and the internal parts of the mold may be damaged or damaged. (4) In the pin gate type mold using the stripper plate, since the stripper plate itself can move freely, there is no special means for regulating the mold opening order of the mold using the stripper plate. In order to lock the fixed mold and stripper plate, it is necessary to install the locking device on the fixed mold and stripper plate, and also on the stripper plate and the movable mold, and install the double locking device, which is expensive and locks the fixed mold and stripper plate. If the pulling force of the device, the stripper plate, and the die locking device of the movable die are the same, the pulling force is canceled out, and the runner and the molded product are not cut while the fixed die is pulled by the movable die die block. With the fixed mold and stripper plate in contact, open the stripper plate and movable mold. Often, the molded product remains stuck in the cavity, causing the mold to malfunction and scratching the product part of the mold to remove the molded product. Or mold damage. Therefore, the pulling force of the stripper plate and the movable mold locking device must be stronger than the locking device of the fixed mold and the stripper plate, which causes the ejector pin to be excessive when projecting the stripper plate. High force was applied, causing the ejector pins to be damaged and the stripper plate to be warped or damaged. (5) In the conventional pin gate type mold, the impact of removing the spool and the runner and releasing the locking device when the mold is opened is applied to the stopper surfaces at both ends of the stopper pin. It also caused damage. (6) It is uncertain to make the fixed side mounting plate and the fixed mold open to the predetermined position by the bias of the spring in the mold such as the slide core which separates the fixed side mounting plate and the fixed mold. ,
In the middle of the process, the other divided surface was opened, and the molded product under the slide core was often turned, cracked, cracked, or the like, and the product was often not formed. (7) In a mold such as a slide core using a stripper plate that separates the fixed side mounting plate and the fixed mold, since the stripper plate itself can move freely,
In many cases, the stripper plate and the movable mold open when the fixed mold and the stripper plate are in contact with each other, which causes the molded product to stick to the cavity and cause mold malfunction. In order to remove the molded product, the product part of the mold is damaged or the mold is damaged. As described above, the conventional member is a processing surface,
There were many problems such as cost and service life.

The present invention has been made in view of the above-mentioned conventional drawbacks,
A mold and a mold that are simple in structure and can be manufactured at a low cost, as well as being able to perform smooth mold clamping with little resistance, to reliably control the mold opening sequence, and to completely remove molded products. It is intended to provide a mold opening and closing device.

The above and other objects and novel features of the present invention will become more fully apparent when the following description is read in conjunction with the accompanying drawings. However, the drawings are for explanation only, and do not limit the technical scope of the present invention.

[0013]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a fixed mold, a movable mold which is mounted on the fixed mold so as to open the mold, and a movable mold and the fixed mold. A locking member having an integral or removably mounted locking piece and a guide hole, which are mounted on the outer wall surface of one of the dies and protrude in the sliding movement direction of the movable die; An engaging piece urged by an elastic member in an always engaging direction to engage with a locking piece of the locking member attached to the outer wall surface of the other mold at a portion facing the member and at the time of mold clamping; An engaging member having a guide hole formed at a portion communicating with the guide hole of the stop member; and an intermediate plate or a fixed side so that a distal end portion passes through the guide hole of the engagement member and the guide hole of the locking member. The rear end is fixedly attached to the mounting plate. When the movable mold is opened from the fixed mold, the engagement piece of the engagement member is slid in a direction to release the engagement state with the engagement piece of the engagement member. A mold is constituted by a mold opening / closing device including a release bar having a release piece.

The present invention also relates to an engaging piece detachably mounted integrally or detachably mounted on an outer wall surface of one of a movable mold and a fixed mold and protruding in a sliding movement direction of the movable mold. A locking member having a guide hole and a locking piece of the locking member attached to the outer wall surface of the other mold opposite to the locking member; An engaging member urged by the member and an engaging member having a guide hole formed at a portion communicating with the guide hole of the locking member; and a guide hole of the engaging member and a guide hole of the locking member. At the time of opening the movable die, the rear end of which is fixedly attached to the intermediate plate or the fixed-side mounting plate so that the front end thereof penetrates, the engaging piece of the engaging member is engaged with the engaging piece of the locking member when opening the mold. Tip that slides in the direction to release the engaged state Composing the mold opening and closing device in a release bar having an engagement release piece to the site of deviation.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

In the first embodiment of the present invention shown in FIGS. 1 to 10, reference numeral 1 denotes a mold of the present invention which is used by being attached to a molding machine such as a die casting machine. A sprue member into which the tip of the sprue member 2a slidably mounted on a fixed side mounting plate 2 to which a 2a is fitted and fixed and a plurality of support pins 3 mounted on the fixed side mounting plate 2 are inserted. An intermediate plate 4 having an insertion hole 4a and a runner lock pin insertion hole 4b into which a runner lock pin 18 fixed to the fixed side mounting plate 2 is inserted, and the support pins 3, 3, 3, 3 are slid. The gate 5a and one cavity 5 which are attached as possible
b, a fixed die 5 having a fixed end, and a fixed mounting plate of the intermediate plate 4 having a rear end slidably movable by a predetermined amount on the fixed mounting plate 2 and a leading end screwed to the intermediate plate 4. Intermediate plate regulating bolt 6 that regulates the amount of movement from 2
B, and a fixed die for restricting the amount of movement of the fixed mold 5 from the intermediate plate 4, the rear end of which is slidable by a predetermined amount on the fixed mold 5 and the front end of which is screwed and fixed to the intermediate plate 4. A mold control bolt 6A, a movable mold 10 having another cavity 10a and an ejector pin insertion hole 10b formed in the fixed mold 5 so as to open the mold clamping mold,
A movable-side mounting plate 9 for supporting the movable mold 10 via a support plate 9a; and a guide pin inserted into a guide pin insertion hole 11a formed in the fixed mold 5 fixed to the movable mold 10. An ejector plate 12 having an ejector pin 20 which is inserted into the ejector pin insertion hole 10b movably attached to a portion of the support plate 9a of the movable mold 10 and which pushes out a molded product molded in a cavity; A spring 1 that is always separated from the intermediate plate 4 and is housed in a spring housing recess 15a formed on a surface of the fixed mold 5 that comes into contact with the intermediate plate 4.
5 and at least one or more, generally a pair of mold opening / closing devices 7 provided at opposing portions to open and close the fixed mold 5 and the movable mold 10 when the mold clamping mold is opened.

The mold opening / closing device 7 has a key-like engagement with a tip end of a column 22 protruding in the direction of the fixed mold 5 fixed to the outer wall surface of the movable mold 10 by two bolts 24, 24. A locking member 21 made of a metal material or a synthetic resin material having a piece 23 and a guide hole 43, and two locking members 21 on the outer wall surface of the fixed mold 5 corresponding to the locking member 21 via a mounting plate 79. An elastic member insertion hole 35 whose opening is closed by an adjusting screw 36 which is engaged with the locking piece 23 of the locking member 21 fixed by the bolts 39, 39 at the time of mold clamping.
The engagement piece 27 slidably attached to the engagement piece storage section 26 urged by the elastic member 28 using a coil spring inserted into the guide hole 4 of the locking member 21
An engaging member 25 made of a metal material or a synthetic resin material having a guide hole 44 formed at a portion communicating with the third member 3, and the guide hole 44 of the engaging member 25 and the guide hole 43 of the locking member 21 The fixed side mounting plate 2 so that
When the movable mold 10 is opened from the fixed mold 5 whose rear end is fixed to the outer wall surface by bolts 49, 49, the engagement piece 27 of the engagement member 25 is engaged with the engagement member 21. A release bar 42 having a trapezoidal engagement release piece 46 at a position near the distal end that is slid in the direction to release the locked state with the stop piece 23.

The mold 1 having the above structure is attached to a molding machine such as a die casting machine. When the movable mold 10 is pressed by the fixed mold 5 by the mold clamping force and is closed, the release bar 42 of the mold opening / closing device 7 is closed. Since the engagement releasing piece 46 passes through the guide hole 44 of the engaging member 25 and the guide hole 43 of the locking member 21, the engaging piece 27 of the engaging member 25 is locked by the urging force of the elastic member 28. Engages with the locking piece 23 of the member 21,
Division plane PL which is a joint surface between fixed mold 5 and movable mold 10
No. 3 does not open to the extent that burrs are formed on the molded product 70 even when the injection pressure of the molten metal is applied. After the injection is completed, the movable mold 10
Is moved in the mold opening direction, the splitting surface PL1, which is the joining surface of the fixed mold 5 and the intermediate plate 4, is first opened by the urging force of the spring 15. At this time, the runner 19 solidified in the gate 5a is held by the runner lock pin 18, and the molded product 70 is formed in the cavity 1 of the movable mold 10.
The movable mold 10 remains in a state where it is stuck to the formation part 0a.
Move with. Therefore, the runner 19 and the molded product 70 are cut and separated from the gate portion. Further, as the mold opening progresses, the leading end 77 of the engaging piece 27 of the engaging member 25 moves before and after the branch point where the holding surface 45 of the release bar 42 moves to the tapered surface 47 of the disengaging piece 46. The split surface PL2, which is the joining surface between the plate 4 and the fixed-side mounting plate 2, also starts opening. Further, when the mold opening proceeds, the runner 19
The spool integral with the engagement plate 25 is removed from the intermediate plate 4 to the outside, and the tip 77 of the engagement piece 27 of the engagement member 25 moves from the tapered surface 47 of the release bar 42 to the release surface of the engagement release piece 46 and is pressed. While the intermediate plate regulating bolt 6B and the fixed mold regulating bolt 6A are not regulated, the distal end 77 of the engaging piece 27 of the engaging member 25 engages with the engaging piece 23 of the engaging member 21. And the engaging piece 27 and the locking piece 23 are disengaged from each other.
Then, the intermediate plate 4 moves and stops until it is regulated by the intermediate plate regulating bolt 6B and the fixed mold regulating bolt 6A. As a result, the split plane PL3 is separated without obtaining an impact, the movable mold 10 is opened to a predetermined position, and the ejector plate 12 is moved by the ejection of a fixed lot (not shown) from the molding machine to eject the ejector pin. The molded product 70 is removed from the movable mold 10 by projecting the mold 20 and discharged from the space between the movable mold 10 and the fixed mold 5.

When the movable mold 10 moves forward and mold clamping is started, the tip 77 of the engaging piece 27 of the engaging member 25 is engaged with the release bar 42 while the dividing plane PL1 remains open. If the separation surface PL3 is kept in contact with the release surface of the engagement release piece 46, the division surface PL3 can be clamped without any resistance, and the division surface PL1 can be engaged with the engagement piece 2 of the engagement member 25 when the mold is clamped.
7 If the distal end 77 moves to the holding surface 45 of the release bar 42, the guide surface 3 of the locking piece 23 of the locking member 21
And the engaging piece 27 of the engaging member 25 is brought into contact with the elastic member 28.
Locking surface 23 of locking piece 23 retracted outside locking piece 23 against
3A and the engagement piece 27 are locked at a predetermined position,
L3 can perform mold clamping only by the urging force of the elastic member 28, and before and after that, the division plane PL2 also closes without resistance,
The dividing plane PL1 is finally closed only by the resistance of the spring 15, and the mold clamping is completed.

[0020]

FIG. 11 to FIG.
Next, different embodiments of the present invention will be described. In the description of the different embodiments of the present invention, the same components as those in the first embodiment of the present invention are denoted by the same reference numerals, and redundant description will be omitted.

In the second embodiment of the present invention shown in FIGS. 11 and 12, the main difference from the first embodiment of the present invention is that the rear end of the release bar 42 is
The same effects as those of the first embodiment of the present invention can be obtained even with the mold 1A having such a configuration in that the mold 1A is fixed to the outer wall surface of the intermediate plate 4 by 9 and 49.

The third embodiment of the present invention shown in FIGS. 13 and 14 is different from the first embodiment of the present invention mainly in that an inclined pin 73 attached to a fixed-side mounting plate 2 is used. The first embodiment of the present invention is the same as the first embodiment of the present invention, except that the fixed mold 5A having the slide core 71 that slides when the mold clamping mold is opened is used, and the fixed mold 5A formed using the fixed mold 5A thus formed is used. The same operation and effect as those of the embodiment can be obtained. In the third embodiment of the present invention, a plurality of support pins 3 each having a stopper piece 3A for regulating the moving amount of the fixed mold 5A is used at the distal end, and the support pins 3 are fixed. A locking block 72 that presses the rear end of the slide core 71 to be positioned at a predetermined position during mold clamping is fixed to the side mounting plate 2.

The fourth embodiment of the present invention shown in FIGS. 15 to 19 differs from the second embodiment of the present invention mainly in that a movable mold 10A having a stripper plate 8 and a stripper The movable mold 10A and the metal mold 10A thus formed are different in that a mold opening / closing device 7A using a locking member 21A having a locking piece 23 integrally formed with an intermediate joint 55 having a width dimension of the plate 8 is used. The same operation and effect as those of the second embodiment of the present invention can be obtained also in the mold 1C constituted by using the mold opening and closing device 7A.

The fifth embodiment of the present invention shown in FIGS. 20 and 21 is different from the third embodiment of the present invention mainly in that a movable mold 10A having a stripper plate 8, The movable mold 10A and the metal mold 10A thus formed are different in that a mold opening / closing device 7A using a locking member 21A having a locking piece 23 integrally formed with an intermediate joint 55 having a width dimension of the plate 8 is used. The same operation and effect as those of the third embodiment of the present invention can be obtained also in the mold 1D constituted by using the mold opening / closing device 7A.

The sixth embodiment of the present invention shown in FIGS. 22 to 25 differs from the first embodiment of the present invention mainly in that a trapezoidal engagement is provided at both side portions near the front end. Release bar 42A having release pieces 46, 46, locking member 21B having locking pieces 23, 23 formed on both sides, and engaging pieces 27, 27 engaging with locking pieces 23, 23 of this locking member 21B. In the point that the mold opening / closing device 7B using the engaging member 25A provided with the mold is used, the mold 1E configured using the mold opening / closing device 7B thus formed is also the first embodiment of the present invention. The same operation and effect as the embodiment can be obtained.

In the seventh embodiment of the present invention shown in FIGS. 26 to 28, the main difference from the first embodiment of the present invention is that the lower end portion formed separately has a prismatic locking structure. A mold opening / closing device 7C using a locking member 21C in which a locking piece 23 having a portion 51 is inserted into a rectangular locking piece insertion hole 52 and can be detachably attached from below by a bolt 54 is used. In this respect, the same operation and effect as those of the first embodiment of the present invention can be obtained also in the mold 1F constituted by using the mold opening / closing device 7C thus formed.

In the eighth embodiment of the present invention shown in FIG. 29, the main difference from the third embodiment of the present invention is that a prismatic locking portion 51 is provided at a lower end formed separately. A mold opening / closing device 7C using a locking member 21C in which a locking piece 23 having a locking piece 23 is inserted into a rectangular locking piece insertion hole 52 and detachably attached from below by a bolt 54 is used. The same operation and effect as those of the third embodiment of the present invention can be obtained in the mold 1G constituted by using the mold opening / closing device 7C thus formed.

In the ninth embodiment of the present invention shown in FIGS. 30 and 31, the main difference from the seventh embodiment of the present invention is that the lower end formed separately has a prismatic locking structure. The locking piece 23 having the locking portion 51 and the cylindrical locking portion 51a is inserted into the locking piece insertion hole 52 and the circular locking piece insertion hole 52a, and is detachably attached by a bolt 54. In the point that the mold opening / closing device 7D using the member 21D is used, the mold 1H configured using the mold opening / closing device 7D thus formed is the same as the seventh embodiment of the present invention. Various effects can be obtained.

The tenth embodiment of the present invention shown in FIGS.
In this embodiment, the main difference from the seventh embodiment of the present invention is that the locking piece 23 having a prism-shaped locking portion 51 at the lower end formed separately is provided in the form of a square hole. Single insertion hole 52
The mold opening / closing device 7E using the locking member 21E which is inserted into the mold member and is detachably attached from the side surface with the bolt 54 is used. The same effect as that of the seventh embodiment of the present invention can be obtained by using the mold 1I.

The eleventh embodiment of the present invention shown in FIGS.
The main difference between the fourth embodiment of the present invention and the fourth embodiment of the present invention is that the stripper plate 8 is provided with a rectangular column-shaped locking portion 51 at the lower end integrally formed with an intermediate joint 55 having a width dimension. A mold 1J constituted by using the movable mold 10A and the mold opening / closing device 7F thus formed in that the mold opening / closing device 7F using the locking member 21F having the piece 23 is used. The same operation and effect as those of the fourth embodiment of the present invention can be obtained.

The twelfth embodiment of the present invention shown in FIG. 36 is different from the fifth embodiment of the present invention mainly in that a lower end portion in which an intermediate joint 55 having a width dimension of the stripper plate 8 is integrally formed. The movable mold 10A and the mold opening / closing device formed in this way use a mold opening / closing device 7F using a locking member 21F having a locking piece 23 having a prismatic locking portion 51. The same operation and effect as those of the fifth embodiment of the present invention can be obtained by using a mold 1K made of 7F.

The thirteenth embodiment of the present invention shown in FIGS.
The embodiment is different from the eleventh embodiment of the present invention mainly in that a locking member using a locking piece 23 in which an intermediate joint 55 and a prismatic locking portion 51 are formed separately. In terms of using the mold opening and closing device 7G using 21G,
The same operation and effect as those of the eleventh embodiment of the present invention can be obtained also in the mold 1L constituted by using the mold opening / closing device 7G thus formed.

The fourteenth embodiment of the present invention shown in FIGS.
In the present embodiment, the main difference from the thirteenth embodiment of the present invention is that an integral intermediate joint 55a integrally formed with the column 22 to have a dimension smaller than the width dimension of the stripper plate 8, and an integral intermediate joint 55a The locking portion insertion hole 58A into which the prismatic locking portion 51 formed at the lower end portion is inserted and the prismatic locking portion 51A inserted into the rectangular locking piece insertion hole 52 are formed. A mold opening / closing device 7H using a locking member 21H using an intermediate joint 55A using a separation intermediate joint 55A formed with the remaining dimensions of the integral intermediate joint 55a is used in this manner. The same operation and effect as those of the thirteenth embodiment of the present invention can be obtained also in the die 1M constituted by using the opened / closed die opening / closing device 7H.

In the fifteenth embodiment of the present invention shown in FIG. 41, the main difference from the twelfth embodiment of the present invention is that the support 22 is integrally formed with the stripper plate 8 in a size smaller than the width of the stripper plate 8. Integrated intermediate joint 55a
And a locking portion insertion hole 58A into which the rectangular locking portion 51 formed at the lower end of the integral intermediate joint 55a is inserted.
And the integral intermediate joint 55a in which a prismatic locking portion 51A inserted into the rectangular locking piece insertion hole 52 is formed.
Locking member 21 using an intermediate joint 55A using a separated intermediate joint 55b formed to the remaining size of
The mold 1N constructed using the mold opening and closing device 7H thus formed is similar to the twelfth embodiment of the present invention in that the mold opening and closing device 7H using H is used. Various effects can be obtained.

The sixteenth embodiment of the present invention shown in FIGS.
In this embodiment, the main difference from the fourteenth embodiment of the present invention is that the prismatic locking portion 51 of the integral intermediate joint 55a is formed separately and the prismatic locking portion 51 of the separation intermediate joint 55b is formed. Intermediate joint 55B in which locking portion 51A can be formed separately and fixed with bolts 54 respectively
Opening and closing device 7I using locking member 21I
The mold opening / closing device 7 formed in this way in that
In the mold 10 constructed using I, the first aspect of the present invention
The same operation and effect as those of the fourth embodiment can be obtained.

The seventeenth embodiment of the present invention shown in FIGS.
In the second embodiment, the main difference from the first embodiment of the present invention is that the fixed mold 5 and the movable mold 10 when the mold is opened.
By installing the movable mold movement restricting member 80 that regulates the amount of movement of the movable mold 10, the movable movable member 10 is prevented from moving extra by installing such a movable mold movement restricting member 80. The first aspect of the present invention is a mold 1P capable of
The same operation and effect as those of the embodiment can be obtained. The movable mold movement restricting tool 80 is screwed to the outer wall surfaces of the fixed mold 5 and the movable mold 10 via the movement restricting bar 82 having the long hole 81 formed therein and the long hole 81 of the movement restricting bar 82. It is composed of fixed bolts 83,83. The same effect can be obtained even if one end of the movement restricting bar 82 is fixedly attached to the outer wall surface of the fixed mold 5 or the moving mold 10 with the bolt 83.

The eighteenth embodiment of the present invention shown in FIGS.
In this embodiment, the main difference from the seventeenth embodiment of the present invention is that one end of the movement restricting bar 82 is supported on the outer wall surface of the intermediate plate 4 by bolts 83, and the other end is a movable mold. The same operation and effect as in the seventeenth embodiment of the present invention can also be applied to the mold 1Q using the movable mold movement restricting member 80 thus configured in that the outer wall 10 is supported by bolts 83 on the outer wall surface. Is obtained.

The nineteenth embodiment of the present invention shown in FIGS.
The main difference between the fourth embodiment of the present invention and the fourth embodiment of the present invention is that the fixed mold 5 and the movable mold 10 when the mold is opened.
The fourth embodiment of the present invention is also applicable to the mold 1R in which the movable mold movement restricting member 80 for regulating the amount of movement of the movable mold is provided. The same operation and effect as in the embodiment can be obtained.

[0039]

As apparent from the above description, the following effects can be obtained in the present invention.

(1) A fixed mold, a movable mold that is attached to the fixed mold so as to be able to open the mold, and an outer wall of one of the movable mold and the fixed mold. A locking member having an integral or removably mounted locking piece and a guide hole protruding in the sliding movement direction of the movable mold, and a locking member on the outer wall surface of the other die opposite to the locking member. An engaging piece urged by an elastic member in an always engaging direction to be engaged with a locking piece of the attached locking member at the time of mold clamping and a guide formed at a portion communicating with a guide hole of the locking member. An engaging member having a hole, and a rear end portion fixedly attached to an intermediate plate or a fixed-side mounting plate such that a leading end portion passes through a guide hole of the engaging member and a guide hole of the locking member. Before opening the movable mold than the fixed mold A mold opening / closing device comprising: a release bar having a disengagement piece at a position near a distal end for sliding the engagement piece of the engagement member in a direction of releasing the engagement state of the engagement member with the engagement piece. Therefore, even if the mold clamping force of the molding machine does not correspond to the injection pressure, the mold opening / closing device can reliably prevent the mold from being opened during the injection of the molten metal. Therefore, it is possible to reliably prevent burrs from being generated in the molded product, and it is possible to mold a beautiful molded product.

(2) According to the above (1), the engaging piece of the engaging member engaged with the locking piece of the locking member at the time of mold clamping is always urged by the elastic member in the engaging direction, and the release bar is moved. As a result, since the engagement is released by the engagement releasing piece of the release bar, there is no large resistance, no obstacle to safety detection, and the mold can be smoothly clamped at a low pressure, and It is also possible to prevent rusting of parts, damage to the mold, and damage to the mold opening / closing device without occurrence of mold displacement.

(3) According to the above (1), the present invention can be applied by attaching a mold opening / closing device to an existing mold. Therefore, it can be implemented easily and inexpensively.

(4) According to the above (1), it can be used for a normal type mold and a pin gate type mold.

(5) According to the above (1), mold opening and mold clamping can be reliably regulated, so that molding does not occur during molding and trouble such as mold breakage does not occur, and molding can be performed safely. Items can be taken out.

(6) Claims 2, 3, and 4 also have the above (1) to (4).
The same effect as (5) can be obtained.

(7) Claims 5 and 6 also correspond to (1) to (5).
The same effect as described above can be obtained, and it can be provided at low cost.

[Brief description of the drawings]

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

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

FIG. 3 is an explanatory view of a state separated from an intermediate plate.

FIG. 4 is an explanatory view of a state where a movable mold is separated from a fixed mold.

FIG. 5 is an exploded perspective view of the engagement member according to the first embodiment of the present invention.

FIG. 6 is a perspective view of a locking member according to the first embodiment of the present invention.

FIG. 7 is a partially cutaway explanatory view of the mold opening / closing device according to the first embodiment of the present invention.

FIG. 8 is a sectional view taken along line 8-8 in FIG. 7;

FIG. 9 is an explanatory view of a released state of the mold opening / closing device according to the first embodiment of the present invention.

FIG. 10 is an explanatory diagram of the operation of the mold opening and closing device in the closing direction according to the first embodiment of the present invention.

FIG. 11 is a partially broken sectional view of a second embodiment of the present invention.

FIG. 12 is an explanatory diagram of a state where a movable mold is separated from a fixed mold.

FIG. 13 is a partially broken sectional view of a third embodiment of the present invention.

FIG. 14 is an explanatory diagram of a state where a movable mold is separated from a fixed mold.

FIG. 15 is a partially broken cross-sectional view of the fourth embodiment of the present invention.

FIG. 16 is an explanatory diagram of a state separated from an intermediate plate.

FIG. 17 is an explanatory diagram of a state where a movable mold is separated from a fixed mold.

FIG. 18 is a perspective view of a locking member according to a fourth embodiment of the present invention.

FIG. 19 is an explanatory diagram of an operation in a closing direction of a mold opening / closing device according to a fourth embodiment of the present invention.

FIG. 20 is a partially broken cross-sectional view of a fifth embodiment of the present invention.

FIG. 21 is an explanatory view of a state where a movable mold is separated from a fixed mold.

FIG. 22 is a partially broken sectional view of a sixth embodiment of the present invention.

FIG. 23 is a partially cutaway explanatory view of a mold opening / closing device according to a sixth embodiment of the present invention.

FIG. 24 is a sectional view taken along the line 24-24 in FIG. 23;

FIG. 25 is an operation explanatory view of the mold opening and closing device according to the sixth embodiment of the present invention.

FIG. 26 is a partially broken sectional view of a seventh embodiment of the present invention.

FIG. 27 is an exploded perspective view of a locking member according to a seventh embodiment of the present invention.

FIG. 28 is an operation explanatory view of the mold opening / closing device according to the seventh embodiment of the present invention.

FIG. 29 is a partially broken sectional view of the eighth embodiment of the present invention.

FIG. 30 is a partially broken sectional view of a ninth embodiment of the present invention.

FIG. 31 is an exploded perspective view of a locking member according to a ninth embodiment of the present invention.

FIG. 32 is a partially broken sectional view of a tenth embodiment of the present invention.

FIG. 33 is an operation explanatory view of the mold opening / closing device according to the tenth embodiment of the present invention.

FIG. 34 is a partially broken sectional view of an eleventh embodiment of the present invention.

FIG. 35 is an exploded perspective view of a locking member according to an eleventh embodiment of the present invention.

FIG. 36 is a partially broken sectional view of a twelfth embodiment of the present invention.

FIG. 37 is a partially broken sectional view of a thirteenth embodiment of the present invention.

FIG. 38 is an exploded perspective view of a locking member according to a thirteenth embodiment of the present invention.

FIG. 39 is a partially broken sectional view of a fourteenth embodiment of the present invention.

FIG. 40 is an exploded perspective view of a locking member according to a fourteenth embodiment of the present invention.

FIG. 41 is a partially broken sectional view of a fifteenth embodiment of the present invention.

FIG. 42 is a partially broken sectional view of a sixteenth embodiment of the present invention.

FIG. 43 is an exploded perspective view of a locking member according to a sixteenth embodiment of the present invention.

FIG. 44 is a partially broken sectional view of a seventeenth embodiment of the present invention.

FIG. 45 is an explanatory view of a state separated from the intermediate plate.

FIG. 46 is an explanatory view of a state where the movable mold is separated from the fixed mold.

FIG. 47 is a partially broken sectional view of an eighteenth embodiment of the present invention.

FIG. 48 is an explanatory diagram of a state separated from the intermediate plate.

FIG. 49 is an explanatory view of a state where the movable mold is separated from the fixed mold.

FIG. 50 is a partially broken sectional view of a nineteenth embodiment of the present invention.

FIG. 51 is an explanatory view of a state where the movable mold is separated from the fixed mold.

FIGS. 52 to 54 are explanatory views of a conventional mold.

FIGS. 55 to 58 are explanatory diagrams of different conventional molds.

[Explanation of symbols]

1, 1A to 1R: mold, 2: fixed side mounting plate, 3: support pin, 4: intermediate plate, 5, 5A: fixed mold, 6A: fixed mold regulating bolt, 6B: intermediate plate regulating bolt,
7, 7A to 7I: Mold opening / closing device, 8: Stripper plate, 9: Movable mounting plate, 10, 10A: Movable mold, 11: Guide pin, 12: Ejector plate, 15: Spring, 21, 21A to
21I: locking member, 23: locking piece, 25: engaging member,
27: engagement piece, 28: elastic member,
42: release bar, 43: guide hole, 44: guide hole, 46: disengagement piece, 55, 55A: intermediate joint.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ identification code FI B29C 45/80 B29C 45/80 (58) Field surveyed (Int.Cl. ⁶ , DB name) B22D 17/22 B22D 17/26 B29C 33/20 B29C 45/64 B29C 45/80

Claims (6)

(57) [Claims] 1. A fixed mold, a movable mold attached to the fixed mold so as to be able to open a mold clamping mold, and attached to an outer wall surface of one of the movable mold and the fixed mold. A locking member projecting in the sliding movement direction of the movable mold, integrally or detachably mounted, and a locking member having a guide hole, and mounted on an outer wall surface of the other die at a portion opposed to the locking member. An engaging piece urged by an elastic member in an always engaging direction to be engaged with the engaging piece of the engaging member at the time of mold clamping, and a guide hole formed at a portion communicating with the guide hole of the engaging member. The fixing member having a rear end portion fixedly attached to an intermediate plate or a fixed-side mounting plate such that a leading end portion penetrates a guide hole of the engaging member and a guide hole of the locking member. Engagement when opening the movable mold from the mold A mold opening / closing device comprising a release bar having an engagement releasing piece at a position near a distal end for sliding the engaging piece of the member in a direction of releasing the engagement state of the locking member with the locking piece. A mold comprising: a mold; 2. A fixed mold, a movable mold having a stripper plate attached to the fixed mold so as to be able to open a mold closing mold, and a movable mold outside the one of the movable mold and the fixed mold. A locking member having a locking piece and a guide hole integrally or detachably mounted so as to protrude through an intermediate joint having a width dimension of the stripper plate in a sliding movement direction of the movable mold mounted on a wall surface;
An engagement piece urged by an elastic member in a constant engagement direction to engage with a locking piece of the locking member attached to an outer wall surface of the other mold at a portion opposed to the locking member at the time of mold clamping. And an engaging member having a guide hole formed at a portion communicating with the guide hole of the locking member, and an intermediate plate such that a distal end portion passes through the guide hole of the engaging member and the guide hole of the locking member. Alternatively, when the movable mold is opened from the fixed mold whose rear end portion is fixedly attached to the fixed-side mounting plate, the engagement piece of the engagement member engages with the engagement piece of the engagement member when the movable mold is opened. A mold opening / closing device comprising: a release bar having an engagement releasing piece at a position near a distal end portion that slides in a direction to release the state. 3. A fixed mold, a movable mold attached to the fixed mold so as to be able to open a mold, and an outer wall surface of one of the movable mold and the fixed mold. A locking member projecting in the sliding movement direction of the movable mold, integrally or detachably mounted, and a locking member having a guide hole, and mounted on an outer wall surface of the other die at a portion opposed to the locking member. An engaging piece urged by an elastic member in an always engaging direction to be engaged with the engaging piece of the engaging member at the time of mold clamping, and a guide hole formed at a portion communicating with the guide hole of the engaging member. The fixing member having a rear end portion fixedly attached to an intermediate plate or a fixed-side mounting plate such that a leading end portion penetrates a guide hole of the engaging member and a guide hole of the locking member. Engagement when opening the movable mold from the mold A mold opening and closing device comprising: a release bar having an engagement releasing piece at a position near a distal end that slides an engaging piece of a member in a direction to release an engagement state of the locking member with the locking piece; The movable mold is provided with a movement restricting tool for restricting a moving distance away from the fixed mold when the mold is opened, the movable mold being attached to an outer wall surface of the movable mold. Mold to do. 4. A fixed mold, a movable mold having a stripper plate attached to the fixed mold so as to be able to open a mold closing mold, and a movable mold outside the one of the movable mold and the fixed mold. A locking member having a locking piece and a guide hole integrally or detachably mounted so as to protrude through an intermediate joint having a width dimension of the stripper plate in a sliding movement direction of the movable mold mounted on a wall surface;
An engagement piece urged by an elastic member in a constant engagement direction to engage with a locking piece of the locking member attached to an outer wall surface of the other mold at a portion opposed to the locking member at the time of mold clamping. And an engaging member having a guide hole formed at a portion communicating with the guide hole of the locking member, and an intermediate plate such that a distal end portion passes through the guide hole of the engaging member and the guide hole of the locking member. Alternatively, when the movable mold is opened from the fixed mold whose rear end portion is fixedly attached to the fixed-side mounting plate, the engagement piece of the engagement member engages with the engagement piece of the engagement member when the movable mold is opened. A mold opening / closing device including a release bar having an engagement release piece at a position near the tip end for sliding movement in a direction to release the state, and the movable unit attached to outer wall surfaces of the fixed mold and the movable mold. Restricts the amount of movement of the mold away from the fixed mold when opening the mold Mold, characterized in that it comprises a movement restricting mechanism of the movable mold. 5. A locking piece and a guide hole integrally or detachably attached to an outer wall surface of one of a movable mold and a fixed mold and protruding in a sliding movement direction of the movable mold. And a resilient member which is always engaged with a locking piece of the locking member attached to the outer wall surface of the other mold opposite to the locking member in a direction of engaging the mold. An engaging member having a guide hole formed at a portion communicating with the biased engaging piece and the guide hole of the locking member; and a distal end portion configured to guide the guide hole of the engaging member and the guide hole of the locking member. The engaging piece of the engaging member engages with the locking piece of the locking member when the movable mold is opened, the rear end of which is fixedly mounted on the intermediate plate or the fixed mounting plate so as to penetrate. To slide in the direction to release A mold opening and closing device, comprising: a release bar having an engagement releasing piece. 6. The stripper plate protrudes through an intermediate joint having a width dimension of the stripper plate in a sliding movement direction of the movable mold attached to an outer wall surface of one of the movable mold and the fixed mold. A locking member having a locking piece and a guide hole integrally or detachably mounted on the locking member; and a locking piece of the locking member mounted on the outer wall surface of the other mold opposite to the locking member. An engagement member having an engagement piece urged by an elastic member in a constant engagement direction to be engaged at the time of mold clamping, and a guide hole formed at a portion communicating with the guide hole of the engagement member; When the movable mold is opened from the fixed mold, the rear end of which is fixedly attached to the intermediate plate or the fixed-side mounting plate so that the front end thereof penetrates the guide hole of the locking member and the guide hole of the locking member. Engagement piece of engagement member And a release bar having a disengagement piece at a position near the distal end that slides in a direction of releasing the engagement state of the locking member with the locking piece.