JP2008155265A - Forming die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forming die where a pin member such as a core pin can be replaced utilizing the opening/closing operation of the die without removing the die from a molding machine, and working efficiency when replacing the pin member can be improved with a simple constitution. <P>SOLUTION: The forming die is equipped with: a fixed die 1 and a movable die 2 arranged so as to be opposed to each other; and a core pin 11 (pin member) at least provided to one of these dies and projecting to the inside of a cavity formed by die elements including these dies. The forming die comprises: a pin holding rod 21 for holding the core pin 11; a pin extrusion plate 22 for supporting and moving the pin holding rod 21; an extrusion plate working rod 23 for converting the opening/closing operation of the die into the protrusion/retraction operation of the core pin 11 via the holding rod 21 and the pin extrusion plate 22; a movable die side lock mechanism 24 for fixing the extrusion plate operating rod 23 to the movable die 2; and a fixed die side lock mechanism for fixing the extrusion plate operating rod 23 to the fixed die 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a molding die used for casting, injection molding, and the like, and more particularly to a molding die provided with a pin member such as a cast pin protruding into a cavity of the die.

  2. Description of the Related Art Conventionally, in a molding die used for casting, injection molding, etc. (hereinafter also simply referred to as “mold”), due to wear due to a molten metal filled in a cavity, etc., the molding die (casting machine) Are interchangeable (see, for example, Patent Document 1 and Patent Document 2). Specifically, for example, a fixed die and a movable platen provided on the molding machine side are detachably provided by a clamp mechanism or the like so that the die can be attached to the molding machine. It is configured to be replaceable. When exchanging the mold, a conveying device such as a rail or a roller arranged in a predetermined path with respect to the molding machine is used, or a lifting operation by a crane or the like is performed, so that the mold can be conveyed and Exchange is performed.

On the other hand, in a molding die used for casting, injection molding, and the like, as shown in Patent Document 1 and Patent Document 2, a hole or the like is formed in a cast product protruding into the cavity of the mold. For example, there is a configuration including a pin member such as a cast pin (pin-shaped insert, core pin) and an extruding pin for releasing a cast product from a mold.
A conventional configuration of a molding die having such a pin member will be described with reference to FIG. FIG. 6 shows a die casting die as an example of the molding die.

As shown in FIG. 6, the die casting mold according to the present example includes a fixed die 101 and a movable die 102 that is provided so as to be movable in the proximity and separation direction with respect to the fixed die 101. . A die base 103 is coupled to the back side of the movable mold 102. The die base 103 is fixed and attached to a mold fastening mechanism (not shown) such as a movable platen provided movably in the casting machine. As a result, the movable mold 102 moves so as to approach and separate from the fixed mold 101. The fixed mold 101 is fixed and attached to a mold fastening mechanism (not shown) such as a fixed platen provided in the casting machine.
Between the closed state of the movable mold 102 relative to the fixed mold 101 (the mold closed state), there is a cavity 104 as a casting space and a runner gate as a molten metal channel communicating with the cavity 104. 105 is formed. The fixed mold 101 and the movable mold 102 have a divided structure composed of a main mold (fixed main mold 101a, movable main mold 102a) and an insert (fixed insert 101b, movable insert 102b). 104 is formed by the nesting part of each of the fixed mold 101 and the movable mold 102.

  On the other hand, an injection mechanism for injecting molten metal into the cavity 104 is configured on the back side of the fixed mold 101. The injection mechanism is configured such that the injection sleeve 106 connected to the back side of the fixed mold 101 so as to communicate with the runner gate 105, and the injection sleeve 106 can be moved forward and backward through the plunger rod 107. And a plunger tip 108 slidably provided. The molten metal 110 is poured into the injection sleeve 106 from a ladle (hot water supply device) 109 provided above via the hot water supply port 106a. With this configuration, the molten metal 110 supplied into the injection sleeve 106 is injected into the cavity 104 through the runner gate 105 at a high speed and high pressure by the forward movement of the plunger tip 108.

  The die casting mold according to this example includes cast pins (111, 112) as pin members for projecting into the cavity 104 and forming holes or the like in the cast product. In this example, a fixed die casting pin 111 provided on the fixed die 101 side and a movable die casting pin 112 provided on the movable die 102 side are provided.

The fixed die casting pin 111 and the movable die casting pin 112 are respectively a main die (fixed main die 101a and a movable main die 102a) and a nest (fixed insert 101b and a movable insert) in the fixed die 101 and the movable die 102, respectively. 102b) and is fixed by a so-called fitting killing method in which it is fixed between the two.
That is, flange portions (large diameter portions) 111a and 112a are formed at the base end portions of the respective casting pins 111 and 112, and the flange portions 111a and 112a are connected to the main molds 101a and 102a and the inserts 101b. The fixed die casting pin 111 and the movable die casting pin 112 are fixed to the fixed die 101 and the movable die 102, respectively, by being sandwiched between them.

  Further, in the die casting mold according to this example, an extrusion pin 113 is provided as a pin member for extruding a cast product formed in the cavity 104 from the mold. Extrusion pins 113 (two shown in FIG. 6) are provided so as to penetrate the movable mold 102 in the approaching and separating directions, and the proximal end side protruding from the back side of the movable mold 102 is movable in the die base 103. It fixes to the extrusion board 114 provided. The extrusion plate 114 is connected to an extrusion rod 115 extending in the die base 103 from an extrusion mechanism (not shown), and moves as the extrusion rod 115 is moved by the operation of the extrusion mechanism. When the casting plate 114 is cast, that is, when the die is in the mold-closed state, the pushing plate 113 is positioned at a position where the tip surface of the pushing pin 113 coincides with the cavity forming surface of the movable die 102. With such a configuration, the cast product solidified in the cavity 104 is released from the fixed mold 101 while being stuck to the movable mold 102 side by mold opening caused by movement of the movable mold 102 in the separation direction. In this state, the extrusion pin 114 protrudes from the cavity forming surface of the movable mold 102 by the movement of the extrusion plate 114 toward the movable mold 102, whereby the cast product is released from the movable mold 102.

Such an extruding pin 113 is also fixed by a fitting method similar to the cast pins 111 and 112 described above.
That is, the extrusion plate 114 that supports the extrusion pin 113 is configured as a mated plate shape of the front plate 114a on the protruding side of the extrusion pin 113 and the rear plate 114b on the opposite side. A flange portion (large-diameter portion) 113a is formed in the flange portion 113a. The flange portion 113a is sandwiched between the front plate 114a and the rear plate 114b, whereby the push pin 113 is fixed to the push plate 114.

Such pin members such as cast pins and extrusion pins, especially cast pins, are exposed to high-temperature molten metal filled in the mold cavity at high speed and high pressure. Bending occurs and wear occurs due to multiple use, and it is necessary to perform replacement frequently.
However, the conventional molding die as described above has a structure in which the pin member is fixed by a fitting and killing method. Therefore, when replacing the pin member, the entire die is molded by a molding machine (casting machine). After removing from the machine and carrying it out of the machine, troublesome work such as disassembling the mold is required. For this reason, replacement of the pin member requires a great amount of time and labor, and there is a problem in that productivity is reduced.

A specific example of the replacement procedure of the pin member using the configuration of the die casting mold shown in FIG. 6 will be described by taking the case of a cast pin (fixed cast pin 111, movable cast pin 112) as an example. .
When replacing the casting pins 111 and 112, first, the mold is lowered from the casting machine. That is, the die base 103 coupled to the fixed mold 101 and the movable mold 102 is released from the mold fastening mechanism in the casting machine, and the molds (the fixed mold 101 and the movable mold 102) including the die base 103 are removed from the casting machine. It is. The removed dies are transported to a maintenance space where the casting pins 111 and 112 are exchanged.
The mold conveyed to the maintenance space is laid down so that the fixed mold 101 or the movable mold 102 is on the lower side, and the upper mold is lifted to separate the fixed mold 101 and the movable mold 102 from each other. Subsequently, the main molds 101a and 102a and the inserts 101b and 102b are separated from each other. At this time, for example, an operation of removing auxiliary parts such as a cooling pipe arranged from the main mold to the insert for cooling in the mold is performed as necessary.
Crane work is used for such a series of operations, that is, removal and transportation of the mold from the casting machine, separation of the fixed mold 101 and the movable mold 102, and separation (disassembly) of the main mold and the insert.

As described above, the casting pins 111 and 112 are exchanged in a state where the main mold and the insert are separated in each mold. That is, the cast pins 111 and 112 in which breakage or the like has occurred are removed from the flange portions 111a and 112a and replaced.
After the casting pins 111 and 112 are replaced, the mold is returned to the original state again by crane work. That is, assembly of the main molds 101a and 102a and the inserts 101b and 102b in the reverse order of separation (disassembly), assembly of the fixed mold 101 and the movable mold 102, transportation of the mold to the casting machine, Then, the mold is attached to the casting machine, and the mold is returned to the casting machine.

Thus, when exchanging the casting pin in the conventional mold, it is necessary to remove the mold from the casting machine, which requires a lot of labor and man-hours. In other words, since the cast pin is fixed to the mold by a fitting method, the cast pin cannot be attached or detached from the cavity surface side of the mold. Since the separation and disassembly work of the mold is also impossible due to the structure, in order to take out the casting pin from the mold when replacing the casting pin, the transportation of the mold, separation / disassembly of the mold, and the cooling pipe etc. Work such as attaching and detaching auxiliary parts is required.
Similarly, the above-described push pin has a structure that is fixed by a fitting and killing method. Therefore, when replacing the push pin, it is necessary to remove the mold from the casting machine, which requires much labor and man-hours.

Moreover, about the fixing structure of pin members, such as a casting pin and an extrusion pin, the structure fixed by what is called a backing system is known. Specifically, in the case of a cast pin, a hole is formed in which the cast pin is inserted from the back side of the mold (fixed mold or movable mold) to the nest part, and the tip side is inserted into this hole. The cast pin in a state of projecting into the cavity is fixed from the base end side (rear side) using a fastening member such as a screw or a plug through a rod-like member.
In such a fixing structure with a backing system, when replacing the casting pin, it is not necessary to disassemble the main die and the insert in the die, but when removing or removing the casting pin, work from the back side of the die. In addition, a sufficient working space is required on the back side of the mold. For this reason, it is necessary to remove the mold from the casting machine, which requires a lot of labor and man-hours.

In this way, pin members such as cast pins may need to be replaced at a frequency higher than the frequency of replacing the mold itself. Since the structure is fixed by a backing system or the like, the work associated with the replacement of the pin member, such as the need to remove the mold from the molding machine, is troublesome and requires a lot of labor and man-hours. Therefore, in order to improve productivity, it is desired to improve workability when replacing the pin member.
JP 2003-251450 A JP 2003-126953 A

  The present invention has been made in view of the above-described problems of the prior art, and the problem to be solved is to open and close the mold without removing the mold from the molding machine with a simple configuration. Therefore, it is possible to replace a pin member such as a cast pin using the above, and to provide a molding die that can improve workability when replacing the pin member.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, according to the first aspect of the present invention, a pair of molds that are opposed to each other so as to be relatively movable toward and away from each other and a cavity formed by a mold element that is provided in at least one of the molds and includes the molds. A molding die including a projecting pin member, and is inserted in the approaching and separating direction with respect to the mold and provided so as to be movable in a state in which a base end side projects toward the back side of the mold, A pin-shaped pin holding member that detachably holds the pin member and a proximal end side of the pin holding member are fixed, and the pin holding member is in a position state when the pin member is molded with respect to the mold. In the range where the pin member moves from the normal state to the cavity side than the normal state and becomes a detachable state, which is a position state where the pin member can be attached to and detached from the pin holding member. A pin push-out member provided on the back side of the mold so as to be movable relative to the mold in the approaching / separating direction, and being inserted in the approaching / separating direction with respect to the mold; It is provided so as to be movable in a state of projecting to the back side and the cavity side of the mold, and the base end side is fixed to the pin pushing member, while the tip side projecting portion is a fitting hole provided in the mating mold. A rod-like actuating member provided so as to be able to fit, a first fixing means for fixing the actuating member to the mold at a position where the pin holding member is in the normal state, and the actuating member, And a second fixing means for fixing the paired molds to the mating mold via the tip side protruding portion that is in a state of being fitted into the fitting hole in the mold closed state. .

  According to a second aspect of the present invention, there is provided third fixing means for fixing the operating member to the mold at a position where the pin holding member is in the detachable state.

  According to a third aspect of the present invention, the guide hole provided so as to open to the back side of the mold, and the guide end in a state where the base end side is fixed to the pin pushing member and is inserted into the guide hole portion from the distal end side. And a guide member slidable with respect to the hole.

As effects of the present invention, the following effects can be obtained.
That is, according to the present invention, with a simple configuration, it is possible to exchange a pin member such as a cast pin using the opening / closing operation of the die without removing the die from the molding machine. Workability at the time of replacement can be improved.

Next, embodiments of the invention will be described.
In the embodiment described below, a die casting mold will be described as an example of the molding mold according to the present invention, but the present invention is not limited to this. That is, the present invention can be applied to various molds such as molds used for various castings such as low pressure casting and gravity casting, and molds used for injection molding, blow molding and the like.

  A die casting die (hereinafter also simply referred to as “die”) according to the present embodiment is a pair of dies that are opposed to each other so as to be relatively movable toward and away from each other. And a casting pin 11 as a pin member that protrudes into the cavity 4 that is provided in at least one of these molds and is formed by a mold element including these molds.

As shown in FIGS. 1 and 2, the mold according to the present embodiment includes a fixed mold 1 and a movable mold 2 provided so as to be movable in the proximity / separation direction (left-right direction in the drawing) with respect to the fixed mold 1. The mold body is constituted by the above. In the drawing, for convenience of explanation, a part (upper half) of the mold is shown.
The fixed mold 1 is fixed and attached to a fixed platen 1p provided in a casting machine (not shown). A die base 3 is coupled to the back side (left side in the figure) of the movable mold 2. The die base 3 is fixed and attached to a movable platen (not shown) that is disposed to face the fixed platen 1p and is movably provided in the casting machine. With such a configuration, in the fixed mold 1 and the movable mold 2 as a pair of molds arranged to face each other in the casting machine, the movable mold 2 moves so as to approach and separate from the fixed mold 1.

  A cavity 4 is formed as a casting space between the movable mold 2 and the closed mold 1 (closed state) by movement in the proximity direction (right direction in the figure) to the fixed mold 1 (see FIG. 2). . In the present embodiment, the cavity 4 is formed by the fixed mold 1 and the movable mold 2 as mold elements constituting the mold, but is not limited to this. In other words, the mold may have a configuration including other mold elements in addition to the fixed mold 1 and the movable mold 2 (configuration including three or more mold elements). It will be formed by a mold element.

The fixed mold 1 and the movable mold 2 each have a divided structure composed of a main mold and a nest. That is, the fixed mold 1 has a fixed main mold 1a and a fixed insert 1b incorporated therein, and the movable mold 2 has a movable main mold 2a and a movable insert 2b incorporated therein. A cavity 4 is formed by the nests 1b and 2b of the fixed mold 1 and the movable mold 2, respectively. The cast pin 11 protrudes into the cavity 4.
The cast pin 11 is provided in the movable mold 2 in this embodiment. That is, the casting pin 11 is provided so as to protrude from the cavity forming surface of the movable insert 2b that forms the cavity 4 as described above.

  In the configuration as described above, the cavity is formed by the injection mechanism configured on the back side of the fixed mold 1 or the like with respect to the cavity 4 formed in the mold in the casting state (mold closed state) as shown in FIG. The molten metal is injected at a high speed and a high pressure through a molten metal flow path or the like communicating with 4, and casting is performed. And the hole etc. which were cast by the casting pin 11 in the predetermined position are formed in the shape | molded casting.

In the die-casting mold according to this embodiment having such a configuration, as shown in FIGS. 1 and 2, a pin holding bar (connecting bar) 21 as a pin holding member that holds the core pin 11, and The pin pushing plate 22 as a pin pushing member for supporting and moving the pin holding rod 21, and the opening / closing operation of the die are moved into and out of the cast pin 11 through the pin holding rod 21 and the pin pushing plate 22. Extrusion plate actuating rod 23 as an actuating member for conversion, movable type side lock mechanism 24 as a first fixing means for immobilizing the push plate actuating rod 23 to the movable die 2, and an extruding plate actuating rod And a fixed mold side locking mechanism 25 as a second fixing means for fixing 23 to the fixed mold 1.
Among these configurations, the pin holding rod 21, the pin push plate 22, the push plate actuating rod 23, and the first fixing means (movable die side lock mechanism 24) are the die on the side where the core pin 11 is provided, that is, In the present embodiment, the movable mold 2 is provided, and the second fixing means (fixed mold side lock mechanism 25) is a mold on the other side of the mold on the side where the casting pin 11 is provided, that is, the fixed mold 1 in the present embodiment. Is provided.

The pin holding bar 21 is inserted into the movable mold 2 in the approaching / separating direction (hereinafter referred to as “mold moving direction”), and provided so as to be movable in a state where the base end side protrudes from the back side of the movable mold 2. It is a rod-like member that detachably holds the cast pin 11 on the tip side.
The pin holding rod 21 is formed in a rod shape such as a columnar shape or a prismatic shape, and is for a holding rod that is formed penetrating in the mold moving direction with respect to the movable die 2 at a portion of the movable die 2 where the cast pin 11 is provided. It is provided so as to be movable while being slid in the axial direction (mold moving direction) while being inserted into the hole 26. That is, in the portion of the movable die 2 where the core pin 11 protrudes, the movable main die 2a and the movable insert 2b are continuously penetrated and the diameter of the pin holding rod 21 (the shape in the axial direction) is substantially the same. A holding rod hole 26 having a diameter (shape) is provided, and the pin holding rod 21 is slidably inserted into the holding rod hole 26.

The base end side (left side in the figure) of the pin holding rod 21 protruding to the back side of the movable mold 2 is fixed to the pin push plate 22.
In the present embodiment, the pin extrusion plate 22 is formed in a laminated plate shape of a front plate 22a on the protruding side (right side in the drawing) of the cast pin 11 and a rear plate 22b on the opposite side, while the pin holding bar A flange portion (large-diameter portion) 21a is formed at the base end portion of the pin 21, and this pin portion 21a is sandwiched between the front plate 22a and the rear plate 22b, so that the pin holding rod 21 is pushed out of the pin. It is fixed to the plate 22.

The cast pin 11 is detachably held on the tip side of the pin holding bar 21. The attachment / detachment configuration of the cast pin 11 with respect to the pin holding rod 21 is not particularly limited, but as the attach / detach configuration, for example, a male screw portion is provided on either the cast pin 11 or the pin holding rod 21. A fastening structure or the like by providing a female screw portion on the other side is used.
The casting pin 11 configured to be detachable from the pin holding bar 21 in this way includes a functional part 11a that is a part that acts on a cast product and a part that is operated when the pin holding bar 21 is attached to and detached from. It has a detachable operation part 11b which is a part. That is, in the cast pin 11, the functional portion 11a is a portion that protrudes from the cavity forming surface in a state during casting of the mold, and the protruding portion corresponds to a predetermined hole portion or the like that is formed in the cast product. It has the shape of Moreover, the attachment / detachment operation part 11b is comprised by the base end side of the casting pin 11 with respect to the function part 11a.

The attaching / detaching operation portion 11 b of the cast pin 11 is configured to be movable in the holding rod hole 26 as the pin holding rod 21 moves. That is, the attaching / detaching operation portion 11b has a shape that is substantially continuous with the rod-like shape of the pin holding rod 21 (a shape that substantially extends the rod-like shape), and the pin holding rod 21 moves in the holding rod hole portion 26. It is configured in a shape that does not prevent (sliding).
Moreover, the attachment / detachment operation part 11b includes a part (hereinafter referred to as “operation part”) operated when attaching / detaching the core pin 11 to / from the pin holding rod 21 as described above. Here, as an operation portion of the attachment / detachment operation portion 11b, for example, when a fastening structure is used for the attachment / detachment configuration of the cast pin 11 with respect to the pin holding rod 21, a hexagonal columnar portion or the like is used. That is, in this case, the operation of the cast pin 11 is performed by using a tool such as a wrench with respect to the operation portion that is a hexagonal column shape portion, and the cast pin 11 is attached to and detached from the pin holding rod 21. It will be.
However, the operation part of the attaching / detaching operation part 11b is such that the molten metal does not enter the holding rod hole 26 in a state where the casting pin 11 is in the position at the time of casting (the function part 11a protrudes from the cavity forming surface). It is provided as follows. In other words, the operation part in the attachment / detachment operation part 11b is in the axial direction in the attachment / detachment operation part 11b or the base so that the casting pin 11 is in the position at the time of casting so as not to be located in the cavity forming surface part. Provided at the end.

Thus, the pin holding bar 21 moves (slides) in the holding bar hole 26 together with the portion of the attaching / detaching operation part 11b of the core pin 11 to be held.
In the following description, the state of the casting pin 11 at the time of casting (molding) with respect to the movable die 2, that is, the state in which only the functional portion 11a protrudes from the cavity forming surface is referred to as “casting state” (FIGS. (See 2nd grade). Similarly, the cast pin 11 is moved to the cavity 4 side from the casting state, and the cast pin 11 can be attached / detached to / from the pin holding rod 21, that is, the attach / detach operation portion 11 b is removed from the cavity forming surface. The protruding state is referred to as an “exposed state” (see FIG. 3B and the like).

  The pin pusher plate 22 is fixed relative to the movable die 2 on the back side of the movable die 2 within a range in which the proximal end side of the pin holding rod 21 is fixed and the pin holding rod 21 is in a predetermined state. It is a member provided to be movable in the mold moving direction. Here, the range in which the pin holding rod 21 is in the predetermined state is a normal state in which the cast pin 11 is in a position state during casting (a state during casting) with respect to the movable mold 2 (FIGS. 1 and 2). The cast pin 11 moves to the cavity 4 side from the normal state so that the cast pin 11 can be attached to and detached from the pin holding rod 21 (exposed state) (see FIG. 3 (b) etc.). That is, the pin pusher plate 22 is provided so as to be movable in the mold moving direction relative to the movable mold 2 within a range in which the pin holding bar 21 is in a detachable state from the normal state.

Moreover, the pin extrusion board 22 is comprised by the laminated board shape of the front board 22a and the rear board 22b as above-mentioned. In this embodiment, the pin pusher plate 22 is in the normal state of the pin holding bar 21, and the rear surface of the rear plate 22 b (the surface opposite to the movable mold 2 side) is the back side of the movable mold 2 in the die base 3. The front surface of the front plate 22a (the surface on the movable mold 2 side) is the movable mold 2 in a state where the pin holding bar 21 is detachable with the receiving surface 3a formed at a predetermined interval therebetween. By being in contact with the back side, the relative movement range with respect to the movable mold 2 is limited.
That is, between the back side of the movable mold 2 and the die base 3, there is a space in which the pin pusher plate 22 is movably accommodated within the above-described range (the range in which the pin holding rod 21 is removable from the normal state). The predetermined interval between the back side of the movable mold 2 and the receiving surface 3a of the die base 3 is set so as to allow the pin pusher plate 22 to move within the above-described range.
Hereinafter, regarding the relative position of the pin pusher plate 22 with respect to the movable mold 2, the position where the pin holding bar 21 is in the normal state is referred to as “rear end position”, and the position where the pin holding bar 21 is attachable / detachable is referred to as “front end”. Position.

The push plate actuating rod 23 is inserted in the mold moving direction with respect to the movable mold 2 and is movably provided in a state where the proximal end side and the distal end side protrude to the back side and the cavity 4 side of the movable mold 2, respectively. While the end side is fixed to the pin push-out plate 22, the tip side protruding portion is fitted into a fitting hole (hereinafter referred to as “operating rod fitting hole”) 27 provided in the fixed die 1 which is the counterpart die. It is a rod-shaped member provided so as to be compatible.
The push-out plate actuating rod 23 is formed in a rod shape such as a columnar shape or a prismatic shape, and the movable plate 2 has a predetermined portion (in this embodiment, a portion above the portion where the pin holding rod 21 is provided). On the other hand, it is provided so as to be movable while being slid in the axial direction (mold moving direction) while being inserted in the operating rod hole 28 formed so as to penetrate in the mold moving direction. That is, in a predetermined part of the movable mold 2, the movable mold 2 (movable main mold 2a) passes through the movable mold 2 and has a diameter (shape) substantially the same as the diameter (shape in the axial direction) of the push plate actuating rod 23. A rod hole portion 28 is provided, and the push-out plate operation rod 23 is slidably inserted into the operation rod hole portion 28.

The base end side (left side in the figure) of the push plate operating rod 23 protruding to the back side of the movable mold 2 is fixed to the pin push plate 22.
In the present embodiment, the push plate operating bar 23 is fixed to the pin push plate 22 in the same manner as the pin holding bar 21. That is, a flange portion (large diameter portion) 23a is formed at the base end portion of the push plate operating rod 23, and this flange portion 23a is sandwiched between the front plate 22a and the rear plate 22b of the pin push plate 22. As a result, the push plate operating rod 23 is fixed to the pin push plate 22.

The distal end side (the right side in the figure) of the push-out plate operating rod 23 that protrudes toward the cavity 4 of the movable die 2 is fitted into an operating rod fitting hole 27 provided in the fixed die 1. In other words, the distal end side of the push-out plate operating rod 23 protrudes from the die mating surface 2c of the movable die 2, and the actuating rod fitting hole 27 is fixed to the fixed die 1 so that the protruding portion is inserted by closing the die of the die. The mold matching surface 1c is opened.
The operating rod fitting hole 27 has a diameter (shape) substantially the same as the diameter (shape in the axial direction) of the push plate operating rod 23. In other words, in the mold closed state where the mold matching surface 1c of the fixed mold 1 and the mold matching surface 2c of the movable mold 2 are in contact with each other, the operating rod hole 28 and the operating rod fitting hole 27 have a continuous shape. .

Further, the operating rod fitting hole 27 has a size (depth) at which a portion protruding from the die-matching surface 2c of the push plate operating rod 23 can be fitted at least in a state where the pin push plate 22 is in the rear end position. Formed. That is, when the pin pusher plate 22 is in the rear end position, the die closing (contact between the die mating surfaces 1c and 2c) is performed by the front end side protruding portion from the die mating surface 2c of the pusher plate operating plate 23. The operating rod fitting hole 27 is formed so as not to be obstructed (so that the mold can be closed).
In this embodiment, the size (depth) of the operating rod fitting hole 27 is the mold closed state (contact state between the mold mating surfaces 1c and 2c), and the tip surface of the push plate operating rod 23 is operated. It is set so as to be in contact with the bottom surface of the rod fitting hole 27 (so as to have a bottom).

The movable-type side lock mechanism 24 is a means for fixing the push-out plate operating rod 23 to the movable die 2 at a position where the pin holding rod 21 is in a normal state.
In the movable mold side locking mechanism 24 in the present embodiment, the push plate operating rod 23 is movable by inserting the lock pin 29 into the first locking hole 23b provided in the push plate operating rod 23. 2 is fixed.

The first locking hole 23b is a position where the pin holding bar 21 is in the normal state in the push plate operating rod 23 (hereinafter, the position of the push plate working rod 23 is referred to as a “first fixing position”). It is provided at a predetermined position in a portion in the operating rod hole 28.
In the present embodiment, the first locking hole portion 23b is formed so as to penetrate in a direction perpendicular to the axial direction (left-right direction in the drawing) of the push-out plate operating rod 23 (in the present embodiment, up-down direction in the drawing). The The first locking hole 23b is formed in a diameter (shape) through which the lock pin 29 can be inserted.

In the movable mold 2, a movable lock hole 30 for inserting the lock pin 29 is provided at a position corresponding to the first locking hole 23 b of the push-out plate operating rod 23 in the first fixed position. The movable lock hole 30 has an insertion portion 30a that is a portion into which the lock pin 29 is inserted, and an opening portion 30b that is a portion that opens to the outer side surface (upper surface in the present embodiment in the present embodiment) of the movable die 2.
The insertion part 30a of the movable lock hole 30 is provided at a position corresponding to the first lock hole 23b of the push-out plate operating rod 23 in the first fixed position, and the first lock hole 23b of the lock pin 29 is provided. It forms so that the penetration with respect to the extrusion plate action | operation rod 23 through may be permitted. That is, the insertion portion 30a of the movable lock hole 30 has a diameter (shape) substantially the same as the diameter (shape) of the first locking hole portion 23b, and a continuous hole portion together with the first locking hole portion 23b. Form. When the lock pin 29 is inserted into the hole where the insertion portion 30a and the first locking hole 23b are continuous, the push-out plate operating rod 23 is fixed to the movable mold 2 at the first fixed position. Is done.
Here, the lock pin 29 is provided with a head portion (expanded portion) 29a used for an operation portion or the like when the movable lock hole 30 and the first lock hole portion 23b are inserted and removed. Is inserted into the first locking hole 23 b through the movable lock hole 30, and the head 29 a is buried in the opening 30 b of the movable lock hole 30.

The movable plate side locking mechanism 24 configured as described above fixes the push plate operating rod 23 to the movable die 2 and restricts the movement (sliding) of the push plate working rod 23 at the first fixed position. . Thereby, the movement of the pin pusher plate 22 at the first fixed position of the pusher plate operating rod 23, that is, the pin pusher plate 22 at the rear end position is restricted. As a result, the movement of the pin holding bar 21 and the casting pin 11 held by the pin 21 relative to the movable mold 2 is restricted.
In this manner, the movable mold side lock mechanism 24 is configured to connect the pin pusher plate 22, the pin holding bar 21, and the cast pin 11 that are integrally formed with the movable mold 2 through the pusher plate operating rod 23. It is fixed so that it cannot move.

The fixed mold side locking mechanism 25 is configured so that the pusher plate operating rod 23 is mated with the other end of the pusher plate actuating rod 23 in a state where the pusher plate actuating rod 23 is fitted in the actuating rod fitting hole 27 in the mold closed state. It is a means for fixing with respect to the fixed type | mold 1 which is a type | mold.
The fixed mold side lock mechanism 25 fixes the push-out plate operating rod 23 to the fixed mold 1 with substantially the same configuration as the movable mold side lock mechanism 24. That is, in the fixed mold side lock mechanism 25 in the present embodiment, the push pin operating rod 23 is inserted into the second locking hole portion 23c provided in the push plate operating rod 23, whereby the push plate operating rod 23 is inserted. It is fixed with respect to the fixed mold 1.

The second locking hole 23c is provided at a predetermined position in the portion of the push-out plate operating rod 23 that fits into the operating rod fitting hole 27 (the portion that protrudes from the mold matching surface 2c at the first fixed position).
In the present embodiment, the second locking hole portion 23c is formed so as to penetrate in the vertical direction (vertical direction in the drawing in the present embodiment) with respect to the axial direction (left-right direction in the drawing) of the push plate operating rod 23. The The second locking hole 23c is formed in a diameter (shape) through which the lock pin 31 can be inserted. Hereinafter, the position of the push plate operating rod 23 in a state where the push plate operating rod 23 is fitted in the actuating rod fitting hole 27 is referred to as a “second fixed position”.

In the fixed mold 1, a fixed mold lock hole 32 for inserting the lock pin 31 is provided at a position corresponding to the second locking hole 23 c of the push-out plate operating rod 23 in the second fixed position. The fixed lock hole 32 includes an insertion portion 32a that is a portion into which the lock pin 31 is inserted, and an opening portion 32b that is a portion that opens to the outer side surface (upper surface in the present embodiment in the present embodiment) of the fixed die 1.
The insertion part 32a of the fixed lock hole 32 is provided at a position corresponding to the second locking hole 23c of the push-out plate operating rod 23 in the second fixing position, and the second locking hole 23c of the lock pin 31 is provided. It forms so that the penetration with respect to the extrusion plate action | operation rod 23 through may be permitted. That is, the insertion portion 32a of the fixed lock hole 32 has a diameter (shape) substantially the same as the diameter (shape) of the second locking hole 23c, and a continuous hole portion together with the second locking hole 23c. Form. By inserting the lock pin 31 into the hole where the insertion portion 32a and the second locking hole 23c are continuous, the pusher plate operating rod 23 is fixed to the fixed mold 1 at the second fixing position. Is done.
Here, the lock pin 31 is provided with a head (enlarged portion) 31a used for an operation portion or the like when inserting into and removing from the fixed lock hole 32 and the second lock hole portion 23c. With the head 31 inserted into the second locking hole 23 c through the fixed lock hole 32, the head 31 a is buried in the opening 32 b of the fixed lock hole 32.

By the fixed mold side lock mechanism 25 configured as described above, the push plate operating rod 23 is fixed to the fixed mold 1 and the movement (sliding) of the push plate operating rod 23 at the second fixed position is restricted. . Thereby, the movement of the pin pusher plate 22 at the second fixing position of the pusher plate operating rod 23, that is, the movement of the pin pusher plate 22 with respect to the fixed mold 1 is restricted. As a result, the movement of the pin holding bar 21 and the cast pin 11 held by the pin holding bar 21 relative to the fixed mold 1 is restricted.
In this way, the fixed mold side lock mechanism 25 connects the pin push plate 22, the pin holding bar 21, and the cast pin 11 that are integrally formed with the fixed mold 1 through the push plate operating rod 23. It is fixed so that it cannot move. In other words, the pushing plate working rod 23, the pin pushing plate 22, the pin holding rod 21, and the cast pin 11 that are integrated by fixing the pushing plate working rod 23 to the fixed die 1 by the fixed mold side lock mechanism 25 are movable. Regardless of the movement of the mold 2, it is positioned with respect to the fixed mold 1.

  In addition, the structure of the movable type | mold side locking mechanism 24 and the fixed type | mold side locking mechanism 25 is not limited to this embodiment. That is, the movable mold side lock mechanism 24 and the fixed mold side lock mechanism 25 can fix the push-out plate operating rod 23 to the movable mold 2 and the fixed mold 1 at the first fixed position and the second fixed position, respectively. If it is. Specifically, for example, even when the lock pins 29 and 31 are used as in the present embodiment, the insertion direction, the insertion position, and the like with respect to the push-out plate operating rod 23 are not limited, and the lock mechanism 24 As another configuration of 25, in order to fix the extrusion plate operating rod 23 to the mold (fixed mold 1 and movable mold 2), a bolt fastening structure is formed by forming a screw hole in the extrusion plate operating rod 23, etc. It may be used.

  Further, in the die casting mold according to the present embodiment, the guide hole 41 provided so as to open to the back side of the movable mold 2 and the base end side are fixed to the pin extrusion plate 22 and the guide is guided from the front end side. An extruded plate guide rod 42 is provided as a guide member slidable with respect to the guide hole 41 in a state of being inserted into the hole 41.

  In the present embodiment, the guide hole 41 is configured by inserting an extruded plate guide bush 43 as a hole forming member into a fitting hole 2d that opens on the back side of the movable die 2. That is, the extruded plate guide bush 43 is a member configured in a cylindrical shape as a whole, and the guide hole portion 41 is formed by the inner peripheral surface thereof.

The push-out plate guide bar 42 is a rod-shaped member having a shape that can move while sliding with respect to the guide hole 41, that is, a diameter (shape) that is substantially the same as the diameter (shape) of the guide hole 41.
In the present embodiment, the push plate guide bar 42 is fixed to the pin push plate 22 in the same manner as the pin holding rod 21 and the push plate actuating bar 23. That is, a flange portion (large diameter portion) 42a is formed at the base end portion of the extruded plate guide rod 42, and this flange portion 42a is sandwiched between the front plate 22a and the rear plate 22b of the pin extruded plate 22. As a result, the push plate guide bar 42 is fixed to the pin push plate 22.
The push-out plate guide bar 42 is fixed to the pin push-out plate 22 at a position corresponding to the guide hole 41 and is provided in a state of being slidably inserted into the guide hole 41 from the tip side. In other words, the push-out plate guide bar 42 is in a state where at least the tip portion is inserted when the pin push-out plate 22 is in the rear end position.

The guide hole 41 and the push plate guide rod 42 are provided at positions that do not interfere with the pin holding rod 21 and the push plate operating rod 23, and are configured not to hinder the movement of the pin push plate 22. That is, in the guide hole portion 41 and the push-out plate guide bar 42, movement in the range between the rear end position and the front end position of the pin push-out plate 22 is allowed, and the push-out plate guide rod 42 with respect to the guide hole portion 41 is allowed. The depth of the guide hole 41 and the length of the push plate guide bar 42 are set so that the movement of the pin push plate 22 is guided by sliding.
In addition, in the metal mold | die which concerns on this embodiment, although a pair of guide hole part 41 and the extrusion plate guide bar 42 are provided, it is not limited to this, The guide hole part 41 and the extrusion plate guide bar 42 are The structure provided with two or more sets may be sufficient.

  Thus, by providing the guide hole 41 for the movable mold 2 and the push plate guide bar 42 for the pin push plate 22, respectively, for example, even when the pin push plate 22 is heavy. The movement of the pin pusher plate 22 in the mold moving direction can be guided, and the movement of the pin pusher plate 22 can be stabilized. Thereby, the movement with respect to the movable mold | type 2 of the pin extrusion board 22, the pin holding | maintenance stick | rod 21 fixed to this, and the extrusion board action | operation stick | rod 23 can be made smooth.

  In the mold according to the present embodiment, the pin extrusion plate 22 has a divided structure configured in a laminated plate shape of the front plate 22a and the rear plate 22b, but is not limited thereto, and is an integral type. It may be a (single plate) structure. In this case, when fixing the pin holding bar 21, the push plate operating bar 23, and the push plate guide bar 42 to the pin push plate 22, for example, the pin push plate 22 and a member (pin holding bar 21 / extrusion) fixed thereto. A fastening structure or the like is used in which either one of the plate actuating rod 23 and the push-out plate guide rod 42) is provided with a male screw portion and the other with a female screw portion.

An operation flow when replacing the casting pin 11 in the die casting mold having the above-described configuration will be described with reference to FIGS. In the drawing, for convenience, the operation flow of the mold is divided into FIGS. 3 to 5, but these are performed as a series of operations from FIGS. 3A to 5C.
In the operation flow of the mold described below, since the opening / closing operation of the mold, that is, the relative movement of the movable mold 2 with respect to the fixed mold 1 is used, the relative movement of the movable mold 2 with respect to the fixed mold 1 in the mold movement direction. The position is determined as follows, using the position of the mold matching surface 2c of the movable mold 2 as a reference. That is, the position of the movable mold 2 in which the mold is in the mold open state is set as the “mold opening limit position” in which the mold alignment surface 2c is the position indicated by P1 in the drawing, and the mold is in the mold closed state (the mold alignment surface 2c is The position of the movable mold 2 that is in contact with the mold matching surface 1c of the fixed mold 1) is defined as a “mold closing limit position” where the mold matching surface 2c is the position indicated by P2 in the drawing (position of the mold matching surface 1c). A predetermined stop position between the mold opening limit position and the mold closing limit position of the movable mold 2 is referred to as an “intermediate stop position” where the mold matching surface 2c is a position indicated by P3 in the drawing.
Then, the movable mold 2 is in the mold opening limit position, and as shown in FIG. 1, a usable casting pin 11 is mounted on the pin holding rod 21 as shown in FIG. 24, the pushing plate operating rod 23 is fixed at the first fixing position, the pin pushing plate 22 is in the rear end position, the pin holding rod 21 is in the normal state, and the die pin 11 is in the casting state. Is “in-situ state”.

  During normal casting, the mold is closed by moving the movable mold 2 from the original position of the mold shown in FIG. 1 to the mold closing limit position as shown in FIG. The cavity 4 is formed between the movable mold 2 and the casting state. Here, the push-out plate operating rod 23 is in a bottomed state with respect to the operating rod fitting hole 27.

Then, as a result of the casting process such as the supply of molten metal to the cavity 4 being performed, as shown in FIG.
In this state, when the cast pin 11 is replaced, first, as shown in FIG. 3A, the fixing of the pin pusher plate 22 via the pusher plate operating rod 23 by the movable die side lock mechanism 24 is performed on the fixed die side. The pin pusher plate 22 is switched to be fixed by the lock mechanism 25 via the pusher plate operating rod 23. In other words, the push plate operation rod 23 inserted into the movable lock hole 30 is released from being fixed at the first fixing position by the lock pin 29, and the push plate operation is performed by inserting the lock pin 31 into the fixed lock hole 32. The rod 23 is fixed at the second fixing position. As a result, the pin extrusion plate 22 is fixed to the fixed mold 1 via the extrusion plate operating rod 23.
In the present embodiment, since the movable side lock mechanism 24 and the fixed side lock mechanism 25 have substantially the same configuration, the lock pin 29 and the lock pin 31 are also used. -Different ones may be used depending on the configuration of 25.

Next, as shown in FIG. 3B, the mold is opened, and the movable mold 2 moves in the mold opening direction (the direction away from the fixed mold 1) to the intermediate stop position. Thereby, the casting pin 11 will be in an exposed state. That is, only the movable die 2 moves backward with respect to the pin push plate 22 fixed to the fixed die 1 via the push plate operating rod 23 by the movement of the movable die 2 in the mold opening direction. Therefore, by the movement, the pin pusher plate 22 becomes the front end position, the pin holding bar 21 becomes detachable, and the cast pin 11 is exposed.
Therefore, with respect to the position of the movable mold 2 in the mold movement direction, the intermediate stop position, which is a predetermined stop position between the mold opening limit position and the mold closing limit position, means that the movable mold 2 is moved from the mold closing limit position. The pin pusher plate 22 positioned with respect to the fixed mold 1 and located at the rear end position with respect to the movable mold 2 is moved to the mold opening direction until it reaches the front end position.

  Subsequently, as shown in FIG. 3C, the fixing of the pin pusher plate 22 to the fixed die 1 via the pusher plate operating rod 23 by the fixed die side lock mechanism 25 is released. That is, the lock pin 31 is extracted from the fixed mold lock hole 32, and the pin pusher plate 22 becomes movable with respect to the fixed mold 1.

Next, as shown in FIG. 4A, the mold is further opened, and the movable mold 2 moves to the mold opening limit position. As a result, the pin pusher plate 22 that has become movable with respect to the stationary mold 1 as described above moves with the movement of the movable mold 2 while being in the front end position with respect to the movable mold 2.
As a result, the mold is in an open state, and the space generated between the fixed mold 1 and the movable mold 2 is used as a work space, and the casting pin 11 is exchanged. That is, as shown in FIG. 4A, after the broken cast pin 11 is removed from the pin holding rod 21 and removed, as shown in FIG. 4B, the alternative cast pin 11 is removed. Is attached to the pin holding rod 21.

In such a replacement operation of the casting pin 11, that is, an attachment / detachment operation of the casting pin 11 with respect to the pin holding rod 21, the push plate operating rod 23 is placed on the mold at a position where the pin holding rod 21 is in a detachable state. It is preferable that a third fixing means for fixing the movable mold 2 is provided. In the mold according to the present embodiment, as shown in FIGS. 4A and 4B, an attaching / detaching work locking mechanism 45 is provided as a third fixing means.
The attachment / detachment work locking mechanism 45 fixes the push-out plate operating rod 23 to the movable mold 2 with substantially the same configuration as the movable mold side lock mechanism 24 and the fixed mold side lock mechanism 25. That is, in the attachment / detachment work lock mechanism 45 according to the present embodiment, the push plate operating rod 23 is inserted into the third lock hole 23d provided in the push plate operating rod 23 by inserting the lock pin 46 therethrough. Fixed to the movable mold 2.

In the attaching / detaching work lock mechanism 45 according to the present embodiment, the movable lock hole 30 constituting the movable lock mechanism 24 is used when the lock pin 46 is inserted into the third lock hole 23d.
Therefore, the third locking hole 23d is a position where the pin holding bar 21 is detachable in the push plate operating rod 23 (hereinafter, the position of the push plate working rod 23 is referred to as a “third fixed position”). ) At a position corresponding to the movable lock hole 30.

Note that the fixing structure of the attaching / detaching work lock mechanism 45 is substantially the same as that of the movable-type side lock mechanism 24 and the fixed-type side lock mechanism 25, and the description thereof is omitted.
In the present embodiment, the movable lock hole 30 constituting the movable lock mechanism 24 is used, and the third locking hole 23d is provided in the push-out plate operating rod 23, so that the detachable work lock is provided. Although the mechanism 45 is comprised, it is not limited to this. That is, for example, the first locking hole 23b of the push plate operating rod 23 constituting the movable mold side locking mechanism 24 is used, and the movable plate 2 is in a state where the push plate operating rod 23 is in the third fixed position. The locking mechanism 45 for attachment / detachment may be configured by providing a locking hole similar to the movable lock hole 30 at a position corresponding to the first locking hole 23b. Further, when the detachment work lock mechanism 45 is configured, the movable plate lock mechanism 30 and the first lock hole portion 23b are not used. A locking hole on the side and a locking hole on the movable mold 2 side may be provided.
In addition, the detachment work locking mechanism 45 can fix the push-out plate operating rod 23 to the movable mold 2 at the third fixed position, similarly to the movable mold side lock mechanism 24 and the fixed mold side lock mechanism 25. If so, the configuration is not limited. Further, the lock pin 46 can also be used as the lock pin 29 of the movable-type side lock mechanism 24 or the lock pin 31 of the fixed-type side lock mechanism 25.
For the sake of convenience, the third lock hole 23d and the lock pin 46 constituting the attachment / detachment locking mechanism 45 in the present embodiment are shown only in FIGS. 4 (a) and 4 (b).

The push-out plate operating rod 23 is fixed to the movable mold 2 by the attaching / detaching work lock mechanism 45 configured as described above, and the movement (sliding) of the push-out plate operating rod 23 at the third fixed position is restricted. . Thereby, the movement of the pin pusher plate 22 at the third fixed position of the pusher plate operating rod 23, that is, the pin pusher plate 22 at the front end position is restricted. As a result, the movement of the pin holding bar 21 and the casting pin 11 held by the pin 21 relative to the movable mold 2 is restricted.
In this manner, the attaching / detaching work lock mechanism 45 allows the pin pusher plate 22, the pin holding rod 21, and the cast pin 11, which are integrally formed with the pusher plate operating rod 23, to move the movable die 2. It is fixed so that it cannot move.

Thus, by providing the attaching / detaching work lock mechanism 45 as the third fixing means, the workability of attaching / detaching the casting pin 11 from the pin holding rod 21 is improved when the casting pin 11 is replaced. be able to.
That is, the pin holding rod 21 is positioned with respect to the movable die 2 via the pin pusher plate 22 by fixing the pusher plate operating rod 23 to the movable die 2 by the lock mechanism 45 for attaching and detaching operations. It is prevented that the movable mold 2 moves in the direction of appearance. Thereby, when attaching / detaching the cast pin 11 to / from the pin holding rod 21, an operation can be performed on a predetermined position, and workability is improved.

After the casting pin 11 is replaced, as shown in FIG. 4 (c), the mold is closed, and the movable mold 2 is moved to the intermediate stop position in the mold closing direction (proximal direction to the fixed mold 1). Move to. Here, the push-out plate operating rod 23 is in a bottomed state with respect to the operating rod fitting hole 27.
From this state, as shown in FIG. 5A, the mold is further closed, and the movable mold 2 moves to the mold closing limit position. At this time, as described above, the pusher plate operating bar 23 is bottomed against the actuating rod fitting hole 27, so that the pin pusher plate 22 can no longer move closer to the fixed mold 1, Only the movable mold 2 moves forward. As a result, the pin pusher plate 22 moves to the rear end position with respect to the movable mold 2.

Thereafter, as shown in FIG. 5B, the pin pusher plate 22 is fixed by the movable side lock mechanism 24 via the pusher plate operating rod 23. That is, the pushing plate operating rod 23 is fixed at the first fixing position by inserting the lock pin 29 into the movable lock hole 30. As a result, the pin pusher plate 22 is fixed to the movable mold 2 via the pusher plate operating rod 23.
Then, from the state where the pin push plate 22 is fixed to the movable mold 2 by the movable mold side locking mechanism 24, the mold is opened as shown in FIG. Move to the original position of mold opening. That is, the mold is in the original position. Thereby, a series of operation | movement flows at the time of replacement | exchange of the casting pin 11 in a metal mold | die are complete | finished.

As described above, in the mold according to the present invention, the pin member such as the cast pin is exchanged by using the opening and closing operation of the mold without removing the mold from the molding machine with a simple configuration. Therefore, workability at the time of exchanging the pin member can be improved.
That is, for the movement of the pin pusher plate 22 to which the pin holding rod 21 for holding the cast pin 11 is fixed with respect to the movable mold 2, it is conceivable to use a driving device such as a cylinder device, for example. Since the mold can use the opening and closing operation of the mold as described above, it is not necessary to add a special driving device, and a simple configuration can be realized.
In addition, when replacing the casting pin 11, the casting pin can be attached / detached from the cavity surface side of the mold, and it is not necessary to remove the mold from the molding machine, so that workability can be improved, and labor and man-hours can be reduced. Since it can be greatly reduced, productivity can be improved.

Further, an extrusion plate operating rod 23 provided slidably with respect to the movable mold 2 and an operation rod fitting hole 27 provided in the fixed die 1 and capable of fitting the extrusion plate operating rod 23 from the tip side thereof, A guide function for positioning the fixed mold 1 and the movable mold 2 with respect to the mating mold when the mold is opened and closed is obtained.
That is, the length of the portion (the depth of the working rod fitting hole 27) that fits the working rod fitting hole 27 in the push plate operating rod 23, the diameter of the push plate working rod 23, and the like are as described above in the mold. The pushing plate operating rod 23 and the operating rod fitting hole 27 function as a guide pin and a guide bush for the mating die, respectively.
As described above, the pusher plate operating rod 23 and the operating rod fitting hole 27 can also have functions as a guide pin and a guide bush for the mating die, respectively. In addition, it is not necessary to separately provide a configuration for obtaining a guide function between the movable molds 2. Also from this point, a simple configuration of the mold can be realized.

In the metal mold | die which concerns on this embodiment demonstrated above, it is the structure by which the casting pin 11 is provided in the movable mold 2 side, The structure for replacing | exchanging this casting pin 11, ie, the pin holding rod 21 and a pin extrusion board 22 and the extrusion plate operating rod 23 are provided on the movable mold 2 side, but the present invention can also be applied to a structure in which the casting pin is provided on the fixed mold 1 side.
In this case, the pin holding bar 21, the pin pusher plate 22, the pusher plate actuating bar 23, and the first fixing means (see the movable die side lock mechanism 24) are a fixed die that is a die on the side where the core pin 11 is provided. 1 and the second fixing means (see the fixed mold side lock mechanism 25) is provided in the movable mold 2 which is a mold on the other side of the mold on the side where the casting pin 11 is provided.

That is, in the mold according to the present invention, the opening / closing operation of the mold used when replacing the casting pin 11 is a relative movement operation in the proximity / separation direction between the fixed mold 1 and the movable mold 2 that are disposed to face each other. Therefore, even if the cast pin is provided on the fixed mold 1 side, the structure for exchanging the cast pin according to the present invention is provided on the fixed mold 1 side as in the above-described embodiment. Thus, the present invention can be applied. In this case, a space in which the pin pusher plate 22 can move within a predetermined range is secured on the back side of the fixed mold 1.
Further, even if the casting pin is provided on both sides of the fixed die 1 and the movable die 2, the configuration for exchanging the casting pin is arranged so as not to interfere with each other. The invention can be applied.
Further, as described above, the opening / closing operation of the mold used when replacing the casting pin 11 is a relative movement operation in the approaching / separating direction of the opposingly disposed mold, and therefore, any of the opposingly disposed molds is performed. The present invention can be applied even to a mold structure that is movable and movable.

Moreover, in the metal mold | die which concerns on this embodiment, although the pin member which protrudes in the cavity 4 in a metal mold | die used as replacement | exchange object is used as the casting pin 11, as a pin member which protrudes in the cavity 4, it is injection molding. It may be a molding pin for forming a hole or the like in the molded product in the metal mold, an extrusion pin for extruding the cast product formed in the cavity 4 from the mold, or the like. That is, for example, the present invention can be applied to the extrusion pin as long as the tip portion is replaceable.
Therefore, “protruding” with respect to the pin member protruding into the cavity 4 does not necessarily mean that the pin member protrudes into the cavity 4 at the time of casting (molding) of the mold, but can protrude into the cavity 4. It also includes being provided.

Sectional drawing which shows the structure of the metal mold | die (mold opening state) concerning one Embodiment of this invention. Sectional drawing which shows the structure of the metal mold | die (mold closing state) concerning one Embodiment of this invention. The 1st explanatory view showing the operation flow of the metallic mold for exchange at the time of exchange of a cast pin. Similarly second explanatory diagram. 3rd explanatory drawing. Sectional drawing which shows the structure of the conventional metal mold | die.

Explanation of symbols

1 Fixed type (type)
2 Movable type (type)
4 Cavity 11 Casting pin (pin member)
21 Pin holding rod (pin holding member)
22 pin extrusion plate (pin extrusion member)
23 Extrusion plate working rod (working member)
24 Movable side lock mechanism (first fixing means)
25 Fixed mold side locking mechanism (second fixing means)
27 Actuator rod fitting hole (fitting hole)
41 Guide hole 42 Extrusion plate guide rod (guide member)
43 Extrusion plate guide bush 45 Detachment lock mechanism (third fixing means)

Claims (3)

Molding provided with a pair of molds arranged opposite to each other so as to be relatively movable toward and away from each other and a pin member projecting into a cavity formed by a mold element provided in at least one of the molds and including the mold Mold,
A rod-shaped pin holding member that is inserted in the proximity and separation direction with respect to the mold and is movably provided in a state in which the proximal end protrudes toward the back side of the mold, and detachably holds the pin member on the distal end side When,
The base end side of the pin holding member is fixed, and the pin holding member is moved from the normal state in which the pin member is in a molding state with respect to the mold, so that the pin member is more in the cavity than the normal state. In the range in which the pin member can be attached to and detached from the pin holding member, the proximity and separation direction relative to the die on the back side of the die A pin pusher member movably provided on
Inserted in the approach and separation direction with respect to the mold, and provided so that the base end side and the tip end side can be moved in a state of projecting to the back side and the cavity side of the mold, and the base end side is fixed to the pin pushing member. On the other hand, a rod-like actuating member provided so that the tip side protruding portion can be fitted into a fitting hole provided in the counterpart mold,
First fixing means for fixing the actuating member to the mold at a position where the pin holding member is in the normal state;
A second fixing means for fixing the actuating member to the counterpart mold via the tip side protruding portion that is in a state of being fitted into the fitting hole in the mold closed state of the pair of molds;
A mold for molding, comprising:   The molding die according to claim 1, further comprising third fixing means for fixing the operating member to the mold at a position where the pin holding member is in the detachable state. A guide hole provided to open on the back side of the mold;
A guide member that is slidable with respect to the guide hole in a state where the base end side is fixed to the pin pushing member and is inserted into the guide hole from the distal end side;
The molding die according to claim 1, wherein the molding die is provided.

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