JP2014516800A - Mold pin for separate mold - Google Patents

Abstract

In order to provide a molding die pin separation type mounting apparatus that provides a structure for effective maintenance and maintenance of the molding die pin, the present invention moves in the front-rear direction along the inner periphery of the hollow body case. A mold pin for separation mold that is attached to a mold mounting device for separating mold pins including a mounting unit that performs a mounting operation in a receiving hole formed in the front end portion, and is inside the cavity of the mold device A body provided to be inserted and disposed; and a step groove extending from an end of the body to be inserted into the receiving hole and selectively constrained by the mounting operation. A mold pin for separating mold, characterized in that it comprises a head portion.
[Selection] Figure 2

Description

  The present invention relates to a separate mold pin, and more particularly to a separate mold pin that provides an efficient maintenance and maintenance structure.

In general, a die casting or injection mold apparatus includes a core mold corresponding to the shape of a product molded by die casting or injection, and a core mold drive including a mold pin inside the core mold. And a number of peripheral devices for.
FIG. 1 is a cross-sectional view showing a conventional mold apparatus.

  As shown in FIG. 1, the mold apparatus 1 includes a molded part core 5 between an upper mold 3 and a lower mold 4, and inside the molded part core 5 by die casting or injection. A cavity corresponding to the shape of the product to be molded is formed. Here, one of the upper mold 3 and the lower mold 4 is provided as a movable mold, and when the movable mold advances and the mold closes, the nozzle 7 and the sleeve move forward and the high temperature is increased. Molten material is injected into the cavity.

  At this time, when forming a hole or groove shape for use as a fastener in the product, a high-temperature molten material is injected while the molding die pin 8 is inserted and arranged inside the cavity. So that Thereby, a hole or a groove corresponding to the shape of the molding die pin 8 can be formed in a product formed by die casting or injection, and the product is prepared at the lower end portion of the molding die pin 8. The head portion thus fixed is fixed to the lower side of the molding portion core 5 and the frame of the mold apparatus by bolt fastening or the like.

  On the other hand, the molding die pin 8 is exposed to a high-temperature molten material that is melted and injected, so that fatigue may accumulate in the process of solidifying the material or it may be damaged by injection pressure in a high-temperature environment. Occurs frequently. For example, in the case of aluminum die casting, it is exposed to a molten material having a high temperature of 600 ° C. or higher.

  However, in the conventional mold apparatus, in order to replace the broken mold pin 8, the mold core and the peripheral mold parts constituting the mold apparatus are disassembled one by one to release the bolt connection and the like. Since replacement work had to be performed, the time for maintenance was only delayed. In addition, there is a problem that the productivity and economic efficiency of the product are lowered.

  In order to solve the above problems, the present invention provides a separate mold pin that provides an efficient maintenance and maintenance structure.

  In order to solve the above problems, the present invention provides a molding unit including a mounting unit that performs a mounting operation in a receiving hole formed in a front end portion by moving in the front-rear direction along the inner periphery of a hollow body case. A mold pin for separation mold to be attached to a mold pin separation mold mounting device, which is provided to be inserted and arranged inside the cavity of the mold device, and is formed in a molding part core forming the edge of the cavity A body having an outer periphery corresponding to the formed through-hole; and an attachment unit that is formed so as to extend from an end of the body and to be inserted into the housing hole and to be inserted into the housing hole. A head portion formed with a step groove that is selectively restrained by a fixing tool of the mold, and by the mounting operation, the mold pin for separation mold is inserted into the cavity of the mold apparatus through the through hole. To selectively separate laterally, characterized in that the thickness of the head portion is less than the thickness of the body, to provide a separation type mold pin.

  Here, a cooling hole through which a cooling fluid flows is formed inside the molding die pin, and the cooling hole is provided with a cooling fluid flow path provided inside the molding die pin separating die mounting device. You can communicate.

  The present invention provides the following effects by the above solution.

  First, even when the separate mold pin is damaged and replaced, the mold pin can be removed by simply operating the mounting unit without having to disassemble the molded part core and peripheral mold parts one by one. Since the work is easily disassembled and replaced, the time for maintenance can be shortened, and the productivity and economics of the product can be greatly improved.

  Second, since the thickness or the diameter of the head part of the mold pin for separation mold is smaller than the thickness or the diameter of the body, the operator uses the mold for separation mold to be replaced protruding inside the mold apparatus. The end of the mold pin can be grasped and easily removed and replaced.

  Third, by providing a structure in which the separate mold pin exposed to the high-temperature molten material is effectively cooled by a cooling fluid, the service life of the separate mold pin is greatly extended. be able to.

It is sectional drawing which showed the conventional metal mold apparatus. It is sectional drawing of the metal mold | die apparatus to which the metal mold | die pin separation type | mold attachment apparatus by one Example of this invention was applied. 1 is an external perspective view of a molding die pin separating type mounting apparatus according to an embodiment of the present invention. It is sectional drawing of the metal mold | die pin separation type | mold attachment apparatus by one Example of this invention. It is sectional drawing of the metal mold | die pin separation type | mold attachment apparatus by one Example of this invention. It is sectional drawing of the metal mold | die pin separation type | mold attachment apparatus by one Example of this invention. It is a partial projection perspective view of the metal mold pin separation type attachment device by other examples of the present invention.

  Hereinafter, a separation mold pin according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Here, description of the same configuration similar to the configuration described in the background art is omitted.

  FIG. 2 is a cross-sectional view of a mold apparatus to which a molding die pin separating type mounting apparatus according to an embodiment of the present invention is applied, and FIG. 3 is a perspective view of a molding mold pin separating type mounting apparatus according to an embodiment of the present invention. It is an outer surface perspective view.

As shown in FIGS. 2 and 3, the molding die pin separating die mounting device 520 is fixed to the molding core 15 or the peripheral frame of the die device 10 by bolt fastening or the like. Here, the molding die pin separating mold attaching device 520 attaches the separating mold pin 521 in a separable manner, so that it can be easily replaced when the separating mold pin 521 is damaged. . Here, on the outer peripheral side of the main body case of the molding die pin separating mold attaching device 520, a mold for fastening and fixing with a bolt or the like to the molding portion core of the molding device or the outer portion of the peripheral device. A device fastening portion 528 is provided.
4a and 4b are cross-sectional views of the operating state of the molding die pin separation type mounting apparatus according to one embodiment of the present invention, as viewed in the CC 'direction of FIG.

  As shown in FIGS. 4 a and 4 b, the molding die pin separation type attachment device 520 includes a main body case 525, an attachment unit 530, a fixture 590, and a back-and-forth movement means 540.

  Here, the main body case 525 is formed in a hollow shape, and a slide surface 526 that expands in a round shape is formed on the inner periphery of one end. That is, the inner peripheral surface on one end side of the main body case 525 may be formed on the slide surface 526 formed so as to be inclined with a predetermined gradient, and the end portion thereof may be formed in a round shape.

  The mounting unit 530 is disposed so as to be movable back and forth along the inner periphery of the main body case 525, and a receiving hole 531 is formed in the front end portion to receive the head portion 521a of the mold die for separation mold. A fixture restraining hole 533 is formed at the edge 532 of the receiving hole 531. At this time, it is preferable that the inner peripheral surface of the receiving hole 531 is linearly extended so as to be in close contact with the outer peripheral surface of the separation mold pin 521 and maintain an upright state.

  In addition, a fixture is disposed in the fixture restraint hole 533, and a front side cross section of the fixture restraint hole 533 is formed in a shape surrounding the fixture 590 so that the fixture 590 is not detached. The rear side cross-section is preferably formed so that the fixing device 590 can be retracted. For this reason, the cross section of the fixture is preferably formed in a spherical shape, but is not limited thereto, and may be formed in a square shape or a polygonal shape.

  Accordingly, in a state where the rear end of the fixture 590 is restrained by the inner wall surface of the main body case 525, the head step groove 521b of the mold pin 521 for separating mold is exposed through the fixture restraining hole 533. It is restrained by the portion of the fixed fixture 590. On the other hand, when the mounting unit 530 moves forward and the fixture restraining hole 533 moves to a position corresponding to the slide surface 526, the fixture 590 moves backward toward the expanded inner wall surface side of the slide surface 526. The restraint state of the head step groove 521b of the separation mold pin 521 is released, and the separation mold pin 521 can be easily separated.

  More specifically, as shown in FIG. 4a, the fixture 590 is inserted so that one side is exposed inside the fixture restraining hole 533, and the separated mold is formed by the exposed one side. The head portion step groove 521b of the pin 521 is fixed so that it can be selectively separated.

  On the other hand, as shown in FIG. 4b, when the mounting unit 530 moves forward and the rear surface of the fixture restraining hole 533 contacts the slide surface 526, the fixture 590 moves backward toward the slide surface 526. The restraint state of the head step groove 521b of the separation mold pin 521 is released. Accordingly, when the molding die pin 521 is damaged, it can be easily separated and replaced.

On the other hand, a molding die pin including a mounting unit that performs a mounting operation in the accommodation hole 531 formed in the front end portion by moving in the front-rear direction along the inner periphery of the body case 525 thus hollow. The structure of the separate mold die pin 521 attached to the separate mold attachment device 520 will be described in detail as follows. Here, as described above, the attaching operation is a process of operating the state in which the head portion 521a of the separation mold pin 521 is restrained and fixed, or the restrained state is released and separated. means.
Referring to FIGS. 2 and 4a, the separation mold pin 521 includes a body and a head 521a extending from an end of the body.

  Here, the body is extended and provided so as to be inserted inside the cavity of the mold apparatus 10, and may be formed in a cylindrical shape or a polygonal shape as illustrated. .

  In addition, the head portion 521a is integrally extended from the body and is formed to be inserted into the receiving hole 531. A portion connected to the body is selectively fixed by a mounting operation. A step groove 521b is formed in which the end portion of 590 or the mounting unit 530 is constrained. Here, the step groove 521b may be bent in a round shape.

At this time, the thickness of the head portion 521a is the thickness of the body so that the separating mold pin 521 can be selectively separated in the inner direction of the mold apparatus 10 by the mounting operation. The following is preferable.
Of course, when the body and the head part 521a are cylindrical, it is preferable that the diameter of the head part 521a is formed to be equal to or smaller than the diameter of the body.

  As a result, as shown in FIGS. 2, 4a and 4b, the mounting unit 530 and the fixture 590 of the molding die pin separating mold mounting device 520 release the restraining state of the separating mold pin 521. In this case, the operator opens the upper mold and the lower mold of the mold apparatus 10 and, after grasping the separation mold pin for replacement mold protruding in the inner direction and pulling out in the inner direction, A simple replacement operation can be completed by inserting a new separation mold pin and performing an attachment operation so that the mold pin separation mold attachment device 520 is restrained.

  At this time, since the thickness or diameter of the head portion 521a is smaller than the thickness or diameter of the body, the end of the mold pin for separation mold to be replaced protruding inside the mold apparatus 10 is grasped. It can be easily extracted.

  That is, a through hole corresponding to the outer circumference of the body of the mold pin 521 for separating mold is formed in the molding part core 15 forming the edge of the cavity, and the thickness or the diameter of the head part 521a is the same as the above. Since it is smaller than the thickness or diameter of the body, even if the operator grasps the end of the body and simply pulls it out in the inner direction of the mold apparatus 10, the head 521a interferes with the edge of the through hole or is restrained. You can pass easily without being done.

On the other hand, if the thickness or the diameter of the head part is larger than the thickness or the diameter of the body, the head part is restrained by the frame edge of the mold apparatus and is not pulled out even if it is pulled inside the mold apparatus. Therefore, simple replacement cannot be performed. In such a case, since the molding die pin separating die attaching device 520 itself must be disassembled from the die device and then the separating die molding die pin must be removed, the replacement work is very inconvenient. It takes time.
On the other hand, FIG. 5 is a cross-sectional view showing the structure of the fixture viewed in the direction of DD ′ in FIG. 4a.

  As shown in FIG. 5, it is preferable that a plurality of the fixtures 590 are provided in an arc shape and are inserted into the fixture restraining holes 533 formed in the mounting unit 530. Preferably, they are arranged at an angular interval of 120 ° or 180 ° with respect to the center of each fixture. The fixing device 590 is inserted into the fixing device restraining hole 533, and the mounting unit 530 is coupled to the inside of the main body case 525, whereby the partial assembly can be completed. Of course, the fixing device 590 may be composed of two or more, and may be provided at various angular intervals that are not 120 °.

  On the other hand, as shown in FIG. 4a or 4b, the mounting unit 530 is connected to the front / rear moving means 540 so as to move back and forth by an external force. More specifically, the front / rear moving means 540 is connected to the rear end of the mounting unit 530 and is provided to selectively move the mounting unit 530 back and forth by an external force.

Here, a nut screw hole 527 is formed at the rear end of the mounting unit 530. Further, the front-rear moving means 540 is screwed into the screw hole 527 so as to move in the front-rear direction while rotating, and on the inner periphery of the rear end portion of the main body case 525 by a screw-engaging component 544 or a slide bearing 549. It is preferable that a coupling 543 that includes a drive shaft 541 that is rotatably supported and that is selectively coupled to an external force application device is formed at an end connected to the drive shaft 541. That is, the drive shaft is formed by a screw-type screwing component 544 between a first screw portion formed on the inner periphery of the nut screw hole 527 and a second screw portion formed on the outer periphery of the front end portion of the drive shaft 541. The mounting unit selectively moves forward or backward by the rotation of 541. Here, the screw part may be formed of a double screw part or a triple screw part, and a cross-sectional shape of the screw part may be formed in various forms such as a trapezoid or a triangle.
Of course, the screwing component 544 can be replaced with a ball screw device or the like.

At this time, the external force applying device may be an electric drill tool or the like, and the coupling tool 543 may be formed with a hole or the like through which a wrench or other work tool is coupled by an insertion method and can be rotated together. .
FIG. 6 is a partial projection perspective view of a molding die pin separating type mounting apparatus according to an embodiment of the present invention.

  As shown in FIG. 6, the molding die pin separating type mounting apparatus 520 according to the present embodiment is provided with a bevel gear 545 at the rear end portion of the drive shaft 541 and coupled to the bevel gear 545. A coupling tool 543 is disposed at an end of a worm gear 546, and an external force application device such as an electric drill apparatus to which an AC or DC reduction motor is applied may be coupled to the coupling tool 543. Accordingly, the rotation axis direction of the drive shaft 541 and the rotation axis direction of the coupler 543 can be arranged at a predetermined angle.

  That is, a portion where the molding die pin separating die attaching device 520 is disposed by a complicated outer structure of the die device is narrow without a margin space for connecting and arranging the external force applying device. As described above, when an external force application device such as an electric drill device cannot be arranged in one direction, the coupling direction between the coupler 543 and the external force application device is changed by the coupling structure of the bevel gear 545 and the worm gear 546 described above. Can perform efficient work.

Of course, if the angle of the rotational force transmitted to the coupler 543 can be changed and transmitted, the bevel gear-worm gear coupling structure can be replaced with a universal joint or other configuration.
On the other hand, the cooling structure of the mold pin separation type mounting apparatus according to an embodiment of the present invention will be described as follows.

  Referring to FIGS. 3, 4 a, and 4 b, a long hole 529 is formed in the side portion of the main body case 525, and the outer periphery of the mounting unit 530 is constrained at both ends of the long hole 529 in the front-rear direction. The inflow stopper pipe 555a and the outflow stopper pipe 555b, which function as cooling fluid flow paths, are connected. That is, it is preferable that the mounting unit 530 is disposed such that the distance in the front-rear direction is limited by the separation space between the inflow stopper tube 555a and the outflow stopper tube 555b and the long hole 529.

  The inflow stopper pipe 555a communicates with an inflow pipe 561 inserted into a cooling hole 521c formed inside the molding die pin 521, and the outflow stopper pipe 555b is connected to the rear of the inflow pipe 561. It becomes the form of a double pipe that surrounds the outer periphery of the end portion, and communicates with the outflow pipe 562 that is arranged so that the outer periphery is sealed and coupled to the inner periphery of the cooling hole 521c.

  Here, the cooling fluid flowing in through the inflow stopper tube 555a is preferably air, but cooling water may be supplied for the water-cooled structure. The cooling fluid flowing in through the inflow stopper pipe 555a is cooled through the inflow pipe 561 while circulating inside the separation mold pin 521, and then discharged through the outflow pipe 562 and the outflow stopper pipe 555b. This minimizes the transfer of hot air from the material melted and injected into the cavity in the die casting or injection process to the rear end of the mounting unit 530 to ensure stable operation and to ensure the molding. An effective cooling action for the mold pin 521 can also be performed.

  As described above, the present invention is not limited to the above-described embodiments, but has ordinary knowledge in the technical field to which the present invention belongs without departing from the scope claimed in the claims of the present invention. Modifications can be made by those skilled in the art, and such modifications are within the scope of the present invention.

Claims (2)

Separating mold forming attached to a molding die pin separating mold mounting apparatus including a mounting unit that performs mounting operation in a receiving hole formed in a front end by moving in the front-rear direction along the inner periphery of the hollow body case Mold pin for
A body having an outer periphery corresponding to a through-hole formed in a molding part core forming an edge of the cavity, the body being provided to be inserted inside a cavity of the mold apparatus; and extending from an end of the body A head portion formed to be inserted inside the accommodation hole and formed with a step groove that is selectively restrained by a fixture of the mounting unit by the mounting operation of the molding die pin mounting device. And
The thickness of the head part is equal to or less than the thickness of the body so as to selectively separate the mold pin for separation mold through the through-hole by the mounting operation toward the inner side of the cavity of the mold apparatus. A mold pin for separation mold, characterized in that.   A cooling hole through which a cooling fluid flows is formed inside the molding die pin, and the cooling hole communicates with a cooling fluid flow path provided inside the molding die pin separating mold mounting device. The mold pin for separation mold according to claim 1, wherein: