KR101760125B1 - Die-casting die having structure capable of exposing eject pin - Google Patents

Die-casting die having structure capable of exposing eject pin Download PDF

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Publication number
KR101760125B1
KR101760125B1 KR1020150155729A KR20150155729A KR101760125B1 KR 101760125 B1 KR101760125 B1 KR 101760125B1 KR 1020150155729 A KR1020150155729 A KR 1020150155729A KR 20150155729 A KR20150155729 A KR 20150155729A KR 101760125 B1 KR101760125 B1 KR 101760125B1
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KR
South Korea
Prior art keywords
pin
plate
eject
mold
movable mold
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KR1020150155729A
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Korean (ko)
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KR20170053347A (en
Inventor
김용현
박주열
Original Assignee
동남정밀 주식회사
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Priority to KR1020150155729A priority Critical patent/KR101760125B1/en
Publication of KR20170053347A publication Critical patent/KR20170053347A/en
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Publication of KR101760125B1 publication Critical patent/KR101760125B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/2084—Manipulating or transferring devices for evacuating cast pieces

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

According to the present invention, the rear plate of the eject plate is provided with a pin exposing hole for exposing the eject pin, and a cover is openably and closably provided in the pin exposing hole. When the pin exposing hole is opened, When the pin exposing hole is closed, the eject pin is prevented from moving in a direction away from the front plate, and the engaging plate coupled to the movable mold is formed with an exposure hole for exposing the cover So that even when the engaging plate is fixed to the movable mold, the worn or broken eject pins can be quickly and easily replaced.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a die-casting die having a structure capable of exposing an ejection pin.

More particularly, the present invention relates to a die casting mold having a structure capable of exposing an eject pin so that a replacement operation of an eject pin provided for pushing a metal product molded in a cavity from a movable mold can be easily performed .

An example of a die casting die used for mass production of metal products is shown in Fig. The die casting mold 9 includes a stationary mold 1 fixed to a die casting molding machine (not shown), a movable mold 2 having a front surface 2a facing the stationary mold 1, And a coupling plate 3 disposed on the rear side.

A spacer for separating the movable mold 2 from the engaging plate 3 is provided between the movable mold 2 and the engaging plate 3 so that a space for reciprocating movement of the eject plate 5 4 are disposed. The movable mold 2 is fixed to the engaging plate 3 by bolts 39 penetrating the engaging plate 3 and the spacer 4 and fastened to the female screw 29 of the movable mold 2 have. The engaging plate 3 engaged with the movable mold 2 is installed in the die casting molding machine so that the movable mold 2 is movable in the direction A in which the movable mold 2 approaches and separates from the stationary mold 1. [ The movable mold 2 is moved together with the engaging plate 3 in the direction A in which the movable mold 2 is in tight contact with and spaced from the stationary mold 1. [ When the stationary mold 1 and the movable mold 2 are in close contact with each other, a cavity C is formed between the molds 1 and 2, which is a space in which a metal product is molded.

An eject plate 5 is disposed between the movable mold 2 and the engaging plate 3. The ejection plate 5 is connected to a rod R of a cylinder (not shown) actuated by pneumatic or hydraulic pressure so as to move the movable mold 2 together with the rod R Along the direction A, can move forward and backward with respect to the movable mold 2. [ One end of the ejection pin 6 is fixed to the ejection plate 5. The other end of the eject pin 6 is slidably fitted in the movable mold 2 in the longitudinal direction of the eject pin 6 (reciprocating direction A of the movable mold 2). The eject plate 5 and the eject pin 6 constitute an ejecting unit for pushing the metal product molded in the cavity C. [

On the other hand, the eject plate 5 is in close contact with the back plate 51 (the surface facing the engaging plate 3 side) of the front plate 51 and the front plate 51 which accommodates the one end of the eject pin 6, And a rear plate 52 for preventing the front plate 6 from being detached from the front plate 51 toward the engaging plate 3 side. The rear plate 52 is fixed to the front plate 51 by a plurality of screws 59 penetrating the rear plate 52 and fastened to the female screw hole 519 of the front plate 51.

A stopper portion 61 having an outer diameter larger than the inner diameter of the insertion hole 511 of the front plate 51 in which the eject pin 6 is fitted is formed at one end of each eject pin 6, 61 prevent the eject pins 6 from being pulled out from the front plate 51 toward the stationary mold 1. [

In order to mold a metal product using such a die casting mold 9, the fixed mold 1 and the engaging plate 3 are installed in a die-casting molding machine so as to face each other, and a driving source such as a ram The engaging plate 3 approaches the stationary mold 1 side and the movable mold 2 is brought into close contact with the stationary mold 1 as shown in Fig. Thereafter, when the molten metal (molten metal) is injected into the cavity C formed by the fixed mold 1 and the movable mold 2 which are in close contact with each other, the molten metal injected into the cavity C is hardened (See FIG. 2) having a shape corresponding to the cavity C. 2, when the movable mold 2 is separated from the stationary mold 1, the metal product M is attached to the movable mold 2, And is spaced apart from the stationary mold 1. When the eject plate 5 is advanced (moved in the direction approaching the movable mold 2) as shown by a virtual line in Fig. 2, the eject pin 6 is moved in the direction of approaching the ejection plate 5 The metal product (M) attached to the movable mold (2) is pushed out and separated. After the metal product M is separated, the ejection plate 5 is retracted with respect to the movable mold 2 to immerse the ejection pin 6 into the movable mold 2. Then, the movable mold 2 is moved to the fixed mold 2, (1) so as to repeat the metal product forming process as described above.

On the other hand, when the eject pin 6 is advanced and retracted relative to the movable mold 2, the eject pin 6 is repeatedly slid with respect to the movable mold 2, thereby causing the eject pin 6 to be worn . When the ejection pin 6 pushes the metal product M from the movable mold 2, a reaction force is applied to the ejection pin 6 by the metal product M, whereby the ejection pin 6 Sometimes breakage occurs. Therefore, during use of the die casting mold, the ejection pins 6 having a large amount of wear or broken in the ejection pins 6 should be separated from the eject plate 5 and replaced with new ones. In the case of separating from the ejection plate 5 to replace the ejection pin 6, the screws 59 are released to separate the rear plate 52 from the front plate 51 and then the ejection pins 6 Should be removed from the front plate 51. A new eject pin is inserted into the insertion hole 511 of the front plate 51 and the rear plate 52 is inserted into the front plate 51 The screws 59 are fastened to the female screw holes 519 to fix the rear plate 52 to the front plate 51. [ Then, the movable mold 2 and the engaging plate 3 must be coupled to each other by using bolts 39 again.

In the case of the conventional die casting mold 9, when the engaging plate 3 is fixed to the movable mold 2, the screws 59 are loosened or fastened by the engaging plate 3 It is not possible to remove the ejection pins 6 from the front plate 51 or insert them into the front plate 51. The bolts 39 are first released to separate the engaging plate 3 and the movable mold 2 , The screws 59 were loosened to separate the rear plate 52 from the front plate 51 and then the worn or damaged eject pins 6 had to be replaced.

As described above, in the conventional die casting mold 9, the ejection pin 6 can be replaced only by separating the engaging plate 3 and the movable mold 2. Therefore, And the movable mold 2 must be separated and combined with each other. Therefore, the replacement operation of the eject pin 6 is very cumbersome as a whole. In order to remove the ejection pin 6 to be replaced from the front plate 51 of the ejection plate 5, the screws 59 must be released to separate the rear plate 52 from the front plate 51 The rear plate 52 must be coupled to the front plate 51 again after the replacement of the ejection pins is completed. Therefore, there is a problem that the replacement work of the ejection pins 6 is cumbersome.

Korean Patent Publication No. 10-2012-0115820

SUMMARY OF THE INVENTION It is an object of the present invention to provide a die-casting die having improved structure for quickly and easily replacing an ejection pin.

According to an aspect of the present invention, there is provided a die casting mold comprising: a stationary mold; A movable mold having a front surface facing the stationary mold and forming a cavity as a metal product molding space together with the stationary mold; An engaging plate which is fixed to the rear side of the movable mold so as to be spaced apart from the movable mold; An eject plate disposed so as to be movable forward and backward with respect to the movable mold from the opposite side of the stationary mold with the movable mold interposed therebetween; And an eject pin inserted into the movable mold and one end of which is fixed to the ejection plate so that the metal product molded in the cavity is pushed and separated from the movable mold when the ejection plate moves forward with respect to the movable mold, In the mold, the eject plate includes: a front plate in which one end of the eject pin is inserted and accommodated; A rear plate disposed between the front plate and the engaging plate and fixed to the front plate and having a pin exposing hole for exposing the eject pin at a position facing the eject pin; And an ejection pin for allowing the ejection pin to be released from the front plate through the pin exposing hole when the pin exposing hole is opened, And a cover for preventing the eject pin from moving in a direction away from the front plate by being brought into contact with one end of the ejection pin, wherein, when the coupling plate is fixed to the movable mold, Wherein the coupling plate is formed with an exposure hole for exposing the cover so as to be able to open and close the ball, and the rear plate is provided with a one- And the pin exposing hole is formed to be in contact with the front plate Between the position where the pin exposing hole is closed along the longitudinal direction of the guide groove portion and the position where the pin exposing hole is opened from the opposite side of the surface to the bottom surface of the guide groove portion, And is housed in the guide groove so as to be slidable in contact with the front plate.

According to the present invention, a pin exposing hole for exposing an eject pin is formed on the rear plate of the eject plate, and a cover for opening and closing the pin exposing hole is provided. When the pin exposing hole is opened, And when the pin exposing hole is closed, the cover is brought into contact with the one end of the eject pin to prevent the eject pin from moving in a direction away from the front plate. Therefore, during the die casting molding operation, When the ejection pin is replaced, the cover is opened to open the pin exposure hole, so that the ejection pin can be pulled out of the ejection plate through the pin exposure hole or assembled to the ejection plate have. Therefore, even if the engaging plate is not separated from the movable mold and the front plate and the rear plate of the eject plate are not separated from each other, the eject pins can be pulled out of the front plate of the eject plate. The replacement operation can be performed quickly and easily.

These and other effects will be readily apparent from the description of embodiments of the present invention.

1 is a schematic cross-sectional view of an example of a conventional die casting mold.
FIG. 2 is a view for explaining a process of separating a metal product formed by the die casting mold shown in FIG. 1;
3 is a schematic cross-sectional view of a die casting mold according to an embodiment of the present invention.
4 is a view for explaining a process of separating a metal product formed by the die casting mold shown in FIG.
5 is a view for explaining an operation of replacing an eject pin in the die casting mold shown in FIG.
6 is a schematic cross-sectional view of a portion corresponding to a portion shown in FIG. 5, illustrating major portions of a die casting mold according to another embodiment of the present invention.
7 is a schematic cross-sectional view taken along line VII-VII of the cover portion shown in FIG.
8 is a schematic exploded perspective view of the cover portion shown in Fig.
9 is a view for explaining the operation of replacing the eject pin in the example shown in Fig.
FIG. 10 is a schematic cross-sectional view of a portion corresponding to FIG. 7, illustrating major portions of a die casting mold according to another embodiment of the present invention.
11 is a schematic cross-sectional view taken along line XI-XI of the cover portion shown in Fig.

Hereinafter, a die casting mold according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 3 is a schematic cross-sectional view of a die casting mold according to an embodiment of the present invention, and FIG. 4 is a view illustrating a process of separating a metal product formed by the die casting mold shown in FIG. 5 is a view for explaining an operation of replacing an eject pin in the die casting mold shown in Fig.

For reference, at least a part of the parts shown in the drawings may be shown in a state where a scale, a dimension, and the like are appropriately exaggerated or reduced for convenience of explanation and understanding. Further, in the die casting mold of the embodiment shown in Figs. 3 to 5, for members having the same or similar constitution and function as the die casting mold illustrated in Figs. 1 and 2, it is necessary to prevent unnecessary duplication of explanations, In order to avoid blurring, the same reference numerals as in FIGS. 1 and 2 denote the same reference numerals, and a detailed description of the specific components and functions of the respective members will be omitted. do.

The die casting mold 100 shown in Figs. 3 to 5 is similar to the conventional die casting mold 9 described with reference to Figs. 1 and 2, and includes a stationary mold 1 fixed to a die casting molding machine (not shown) The movable mold 2 has a front surface 2a facing the stationary mold 1 and forming a cavity C for injecting molten metal together with the stationary mold 1. The engaging plate 30 spaced apart from the movable mold 2 with the spacer 4 interposed therebetween passes through the engaging plate 30 and the spacer 4 at the rear side of the movable mold 2, Is fixed to the movable mold (2) by bolts (39) fastened to the female screw hole (29) of the mold (2). The die casting mold 100 is arranged between the movable mold 2 and the engaging plate 30 (that is, on the opposite side of the stationary mold 1 with the movable mold 2 therebetween) An ejection plate 500 disposed so as to be movable forward and backward and a metal product molded in the cavity C from the movable mold 2 when the ejection plate 500 is moved forward to the movable mold 2 side And a plurality of eject pins 6 inserted into the movable mold 2, one end of which is fixed to the eject plate 500. The eject plate 500 and the eject pin 6 constitute an ejecting unit for pushing the metal product molded in the cavity C. [

On the other hand, the eject plate 500 in this embodiment has a different structure from the eject plate 5 in the conventional die casting mold 9 described with reference to Figs. This will be described in detail as follows.

The ejection plate 500 includes a front plate 51 disposed between the movable mold 2 and the engaging plate 30 and a pressing plate 51 disposed between the front plate 51 and the engaging plate 30 A rear plate 520 which is positioned on the front plate 51 by screws 59 and a plurality of covers 550 which are located on opposite sides of the movable mold 2 with respect to the movable plate 2;

The front plate 51 is provided with an insertion hole 511 for receiving one end of the ejection pin 6. The front plate 51 of the die casting mold 9 described with reference to FIGS. .

Unlike the back plate 52 of the die casting mold 9 described with reference to Figs. 1 and 2, the rear plate 520 in this embodiment is provided with a plurality of (Specifically, at a position facing the stopper portion 61 provided at one end of each eject pin 6), and extends from the front surface to the back surface of the rear plate 520 to expose the ejection pin 6 A pin exposing hole 525 is formed. In this embodiment, the number of the pin exposing holes 525 is the same as the number of the eject pins 6, and each of the pin exposing holes 525 is a female screw hole having a female screw portion 525a formed on the inner wall thereof.

The cover 550 is provided in the same number as the pin exposing hole 525 (the same number as the eject pin 6). Each cover 550 is provided for opening and closing the pin exposing hole 525 of the rear plate 520 and has a male screw portion 550a screwed to the female screw portion 525a of the pin exposing hole 525 Respectively. Accordingly, the pin exposing hole 525 is closed or opened in accordance with the rotating direction of the cover 550 with respect to the pin exposing hole 525. That is, when the cover 550 is rotated in one direction, the cover 550 is screwed to the pin exposing hole 525 to close the pin exposing hole 525. When the cover 550 is rotated in the other direction, Is released from the pin exposing hole 525, and the pin exposing hole 525 is opened. When the pin exposing hole 525 is opened, the eject pin 6 is allowed to escape from the front plate 51 through the pin exposing hole 525. When the pin exposing hole 525 is closed by the cover 550 (When the cover 550 is completely fastened to the pin exposing hole 525), the cover 550 contacts the eject pin 6 corresponding thereto and the eject pin 6 is moved toward the engaging plate 30 side (I.e., moving in the direction of leaving the front plate 51). A tool insertion groove 551 such as a straight line, a cross or a hexagon is formed in the cover 550 so that a tool (a driver, a wrench or the like) for rotating the cover 550 is inserted.

On the other hand, in the state in which the engaging plate 30 is fixed to the movable mold 2, all the covers 550 are formed on the engaging plate 30 so that the pin exposing hole 525 can be opened and closed by operating the cover 550 An exposure hole 31 is formed.

The metal product forming process using the die casting mold 100 is the same as the metal product forming process of the conventional die casting mold 9 described with reference to FIGS. That is, the stationary mold 1 and the engaging plate 30 are provided in a die casting molding machine, and the engaging plate 30 is moved toward the stationary mold 1 using a driving source (not shown) provided in the die casting molding machine, The molten metal is injected into the cavity C after the movable mold 2 is brought into close contact with the stationary mold 1 and the cavity C is filled with the molten metal. The molten metal filled in the cavity C becomes hard as time elapses and becomes a metal product having a shape corresponding to the cavity C (see FIG. 4). 4, when the movable mold 2 is separated from the stationary mold 1, the metal product M is attached to the movable mold 2 and is moved together with the movable mold 2 And is spaced apart from the stationary mold 1. In this state, when the ejection plate 500 is advanced (moved in the direction approaching the movable mold) as shown by a virtual line in Fig. 4, the ejection pin 6 advances together with the ejection plate 500 , The metal product (M) attached to the movable mold (2) is pushed out and separated. After the metal product M is separated, the ejection plate 500 is retracted with respect to the movable mold 2 to immerse the ejection pin 6 into the movable mold 2. Thereafter, the movable mold 2 is fixed And is brought into close contact with the mold 1 to repeat the metal product molding process as described above.

In the case of the die casting mold 100 of the present embodiment, the rear plate 520 of the eject plate 500 is formed with the pin exposing holes 525 for exposing the respective eject pins 6 And the respective pin exposition holes 525 can be opened and closed by the corresponding cover 550. Even if the engaging plate 30 is not separated from the movable mold 2, It is possible to perform an operation of replacing the worn or damaged ejection pins 6 without separating the rear plate 51 and the rear plate 520. The ejection pin replacement operation will be described in detail as follows.

The cover 550 corresponding to the ejection pin 6 to be replaced is rotated and the threaded connection between the cover 550 and the pin exposure hole 525 is released Thereby separating the cover 550 from the pin exposing hole 525, as shown in Fig. This operation can be performed through the exposure hole 31 formed in the engaging plate 30, so that the engaging plate 30 can be separated from the movable mold 2. [ When the tool insertion groove 551 is formed in the cover 550 as in the present embodiment, the rotation of the cover 550 can be easily performed by using the tool inserted into the tool insertion groove 551. For example, when a hexagonal tool insertion groove is formed in the cover 550, the cover 550 can be easily rotated using a hexagonal wrench inserted into the tool insertion groove.

When the cover 550 is detached from the pin exposing hole 525 as described above, the pin exposing hole 525 is opened and the eject pin 6 to be replaced is inserted through the pin exposing hole 525 Exposed. In this state, the exposed eject pin 6 is pulled out from the front plate 51 to the engaging plate 30 side, as shown by a virtual line in FIG. 5, through the opened pin exposing hole 525, And a new eject pin is inserted into the front plate 51 through the opened pin exposing hole 525 and accommodated therein. Thereafter, the cover 550 is screwed into the pin exposing hole 525 to the end (until the front plate 51 is brought into contact with the newly received eject pin 6) The replacement operation of the eject pin 6 is completed.

In order to perform the replacement operation of the worn or broken ejection pins 6 as described above, the process of separating and coupling the coupling plate 30 and the movable mold 2, or the process of connecting the front plate 51 and the rear plate 520, The ejection pins 6 can be moved to the front plate 51 by simply opening and closing the pin exposure hole 525 by operating the cover 550 corresponding to the ejection pin 6 to be replaced, , The replacement operation of the eject pin 6 can be performed very quickly and easily.

The ejection pin replacing operation as described above may be performed in a state in which the engaging plate 30 coupled to the movable mold 2 is installed in the die casting molding machine, ) Is hidden by the die casting molding machine and is difficult to approach the cover 550, the ejection pin replacing operation can be performed in a state in which the engaging plate 30 to which the movable mold 2 is engaged is separated from the die casting molding machine .

6 to 9 show a main portion (eject plate portion) of a die casting mold according to another embodiment of the present invention. The eject plate 501 shown in FIGS. 6 to 9 can be applied to the die casting mold 100 shown in FIGS. 3 to 5 in a one-to-one substitution with the eject plate 500. The eject plate 501 of this example differs from the eject plate 500 shown in Figs. 3 to 5 only in the coupling structure of the rear plate 530 and the cover 560, and all other parts are the same. Therefore, the structure of the rear plate 530 of the eject plate 501 and the cover 560 will be described in detail, and detailed description of other parts will be omitted.

The rear plate 530 of the eject plate 501 in this embodiment is formed with a guide groove portion 530a which is depressed with respect to a surface (front surface) which is in contact with the front plate 51. [ The guide groove portion 530a is elongated in one direction perpendicular to the longitudinal direction of the eject pin 6. The back plate 530 also has a through hole 530a extending from the surface opposite to the surface contacting the front plate 51 (the surface exposed to the exposure hole 31 of the engaging plate 30; The pin exposure holes 535 are formed. Each pin exposure hole 535 is formed at each position facing the one end of the eject pin 6 so as to expose the corresponding eject pin 6. [

The cover 560 is provided with a body portion 561 and an operation portion 562. The body portion 561 of the cover 560 is pressed against the pin exposure hole 535 along the longitudinal direction of the guide groove portion 530a of the rear plate 530 (one direction perpendicular to the longitudinal direction of the eject pin 6) (The position as shown in Fig. 6) and the position where the pin exposing hole 535 is opened (the position as shown in Fig. 9) so as to be slidable in contact with the front plate 51, And is accommodated in the guide groove portion 530a. The operating portion 562 of the cover 560 extends from the body portion 561 and protrudes through the pin exposing hole 535 of the rear plate 530. The covers 560 are all exposed through the exposure holes 31 of the engaging plate 30.

On the other hand, as the elastic pressing means for elastically pressing the cover 560 in the direction of closing the pin exposing hole 535, there is provided a compression coil spring 570 inserted into each guide groove portion 530a . Each of the compression coil springs 570 is held in the guide groove portion 530a in a state where the compression coil spring 570 is previously compressed and has a restoring force so that one end is supported by the inner wall of the guide groove portion 530a of the rear plate 530, So that an elastic force is applied to the cover 560 so as to move in the direction of closing the pin exposing hole 535. By this compression coil spring 570, it is possible to effectively prevent the cover 560 from being moved in the direction of unintentionally opening the pin exposure hole 535 during use.

In the die casting mold to which the ejection plate 501 is applied, when it is desired to replace the worn or broken ejection pin among the ejection pins 6, a cover 560 corresponding to the ejection pin 6 to be replaced , And moves the pin exposing hole 535 in the opening direction, as shown in Fig. The operator can easily operate (open / close) the cover 560 by holding the operating portion 562 because the operating portion 562 projected through the pin exposing hole 535 is provided on the cover 560 have.

As described above, when the cover 560 is moved in the direction of opening the pin exposing hole 535, the pin exposing hole 535 is opened and the compression coil spring 570 is resiliently compressed while being compressed.

When the pin exposing hole 535 is opened, the eject pin 6 is exposed through the pin exposing hole 535 and the exposure hole 31. In this state, the eject pin 6 is pulled out from the front plate 51 of the eject plate 501 so as to come out through the pin exposure hole 535 and the exposure hole 31 as shown by a virtual line in Fig. 9 Take it out. After the new eject pin 6 is inserted into the front plate 51 through the exposure hole 31 and the pin exposure hole 535 and accommodated in the front plate 51, the worker pushes the external force applied to the cover 560 The force that has been moved in the pin exposing hole opening direction) is removed. 6, the cover 560 is slid in a direction opposite to the direction of opening the pin exposing hole 535 by the restoring force of the compressed coil spring 570, and the pin exposing hole 535, as shown in FIG. 6, Lt; / RTI > As described above, when the pin exposing hole 535 is closed, the end surface (the end surface of the stopper portion 61) of the one end of the ejection pin 6 comes into contact with the cover 560 so that the cover 560 contacts the front plate 51 In the direction in which it is pulled out.

6 to 9 can be applied to the movable mold 2 as well as to the case where the ejection plate 500 shown in Figs. 3 to 5 is applied, as in the case of applying the ejection plate 501 shown in Figs. Even if the front plate 51 and the rear plate 530 are not separated from each other, it is possible to replace the worn or damaged ejection pins 6 without removing the front plate 51 and the rear plate 530, so that the ejection pins 6 can be quickly and easily replaced.

The ejection plate 501 shown in Figs. 6 to 9 is provided with a compression coil spring 570 to prevent the cover 560 at the position for closing the pin exposing hole 535 from being displaced unintentionally. Respectively. However, for example, in the case where the pin exposure hole 535 is opened when the cover 560 is moved upward and the pin exposure hole 535 is configured to be closed when the cover 560 is moved downward as in the present embodiment Even if the compression coil spring 570 is not provided, the cover 560 at the position for closing the pin exposure hole 535 is closed in the direction of opening the pin exposure hole 535 , Upward direction) can be prevented from being moved.

The eject plate 501 shown in Figs. 6 to 9 has a structure in which one pin exposing hole 535 is provided for each eject pin 6 and one cover 560 is provided for each pin exposing hole 535 That is, the ejection pin 6, the pin exposure hole 535, and the cover 560 are provided in the same number as each other). However, in the case where, for example, several eject pins 6 are adjacent to each other at close intervals, a pin exposure hole is not provided separately for each of the adjacent eject pins 6, 10 and 11) of the ejection pins 6 (that is, the plurality of ejection pins 6 are formed in one pin exposure hole (not shown) And one pin exposing hole 535 for exposing the plurality of eject pins 6 can be opened and closed by a single cover 560. In this case, That is, at least one pin exposing hole that can expose a plurality of eject pins 6 may be included in the plurality of pin exposing holes 535.

The ejection plate 502 shown in Figs. 10 and 11 is also similar to the ejection plate 501 shown in Figs. 6 to 9, and the ejection plate 500 of the diecasting mold shown in Figs. As shown in FIG. Among the constituent elements shown in Figs. 10 and 11, the constituent elements that perform the same functions as those shown in Figs. 6 to 9 are denoted by the same reference numerals, and a description thereof will be omitted.

The replacement method of the eject pin 6 in the case of the eject plate 502 shown in Figs. 10 and 11 is a method of replacing the worn or damaged eject pin by opening the cover corresponding to the worn or broken eject pin 6 and 9, except that the worn or broken protruding pin as well as other eject pins adjacent thereto are also exposed through the pin exposing hole 535. In this case, And therefore, a detailed description thereof will be omitted.

Even if the ejection plate 502 shown in Figs. 10 and 11 is applied, even if the front plate 51 and the rear plate 530 are not separated without separating the engaging plate 30 from the movable mold 2, The ejection pins 6 shown in FIGS. 3 to 5 and the ejection plate 501 shown in FIGS. 6 to 9 are applied .

Meanwhile, in the embodiment shown in FIGS. 3 to 5, one of the pin exposing holes 525 in the form of a female screw is provided for each of the eject pins 6 as in the case of the embodiment shown in FIGS. 6 to 9 However, at least one of the pin exposing holes 525 of the female screw hole-shaped pin exposing holes 525 may have a plurality of eject pins as in the pin exposing holes in the embodiment shown in FIGS. 10 and 11 It is of course possible to configure them to be exposed simultaneously.

In the above-described embodiments, a plurality of eject pins, a plurality of pin exposures and covers are provided and described. However, according to the present invention, it is possible to obtain a configuration in which only one eject pin, have.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

100 ... die casting mold
1 ... stationary mold 2 ... movable mold
3 ... engaging plate 32 ... exposed hole
500, 501, 502 ... eject plate 51 ... front plate
520, 530 ... rear plate 525, 535 ... pin exposure ball
550, 560 ... Cover 6 ... Eject pin

Claims (3)

Fixed mold; A movable mold having a front surface facing the stationary mold and forming a cavity as a metal product molding space together with the stationary mold; An engaging plate which is fixed to the rear side of the movable mold so as to be spaced apart from the movable mold; An eject plate disposed so as to be movable forward and backward with respect to the movable mold from the opposite side of the stationary mold with the movable mold interposed therebetween; And an eject pin inserted into the movable mold and one end of which is fixed to the ejection plate so that the metal product molded in the cavity is separated from the movable mold when the ejection plate moves forward with respect to the movable mold, In the mold,
Wherein the eject plate comprises:
A front plate accommodating one end of the eject pin;
A rear plate disposed between the front plate and the engaging plate and fixed to the front plate and having a pin exposing hole for exposing the eject pin at a position facing the eject pin; And
Wherein the ejection pin is provided for opening and closing the pin exposing hole and allows the eject pin to be removed from the front plate through the pin exposing hole when the pin exposing hole is opened, And a cover for preventing the eject pin from moving in a direction away from the front plate by being brought into contact with the one end,
An exposure hole is formed in the coupling plate so as to expose the cover so that the pin exposure hole can be opened and closed by operating the cover while the coupling plate is fixed to the movable mold,
The rear plate is formed with a guide groove portion which is pierced with respect to a surface contacting with the front plate and is elongated in one direction perpendicular to the longitudinal direction of the eject pin,
Wherein the pin exposing hole is formed so as to pass from a surface opposite to a surface contacting the front plate to a bottom surface of the guide groove,
The cover is accommodated in the guide groove portion in such a manner as to be slidable in a state of being in contact with the front plate between a position for closing the pin exposure hole along a longitudinal direction of the guide groove portion and a position for opening the pin exposure hole Wherein the mold has a structure capable of exposing the eject pin. The method according to claim 1,
A plurality of the eject pins, the pin exposing holes, and the cover,
Wherein each cover includes a body portion accommodated in each of the guide groove portions and an operating portion extending from the body portion and protruding through the pin exposure hole. mold. delete
KR1020150155729A 2015-11-06 2015-11-06 Die-casting die having structure capable of exposing eject pin KR101760125B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102452842B1 (en) 2021-05-18 2022-10-07 이기하 Mold displacement sensor for measuring displacement of molded part of injection mold

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN113231626A (en) * 2021-05-11 2021-08-10 辽宁利元建设工程有限公司 Intelligent nonferrous metal casting system

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JP2009050855A (en) 2007-08-23 2009-03-12 Toshiba Corp Casting apparatus and casting method
JP2011062746A (en) 2009-09-21 2011-03-31 Asahi:Kk Forming die and cleaning pin

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009050855A (en) 2007-08-23 2009-03-12 Toshiba Corp Casting apparatus and casting method
JP2011062746A (en) 2009-09-21 2011-03-31 Asahi:Kk Forming die and cleaning pin

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102452842B1 (en) 2021-05-18 2022-10-07 이기하 Mold displacement sensor for measuring displacement of molded part of injection mold

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