TW202128311A - Die casting device capable of easily mounting and detaching the mold by utilizing the clamping mechanism having traction molds and the traction clippers - Google Patents

Abstract

The invention provides a die casting device which can easily mount and detach the mold. The die casting device (1) comprises a fixed mold (2) and a movable mold (3) capable of moving in a manner of contacting and separating relative to the fixed mold (2) in the mold opening and closing direction. The fixed mold (2) and the movable mold (3) respectively comprise molds (10, 40); mold bases (20, 50) where the molds (10, 40) are mounted thereto; and clamping mechanisms (35, 75) having traction bolts (31, 71) mounted to the mold and traction clippers (35, 75) configured at the mold bases (20, 50) and capable of engaging and disengaging the traction bolts (31, 71). The mold bases (20, 50) have mold base main bodies (21, 51) and cooling plates (22, 52) mounted to the mold base main bodies (21, 51) and internally formed with cooling paths (24, 54). The traction clippers (35, 75) are disposed to the back side of the cooling plates (22, 52). The cooling plates (22, 52) are formed with piercing holes (27, 67) pierced by the traction bolts (31, 71).

Description

Die casting device

The invention relates to a die casting device.

Conventionally, in the molding apparatus described in Patent Document 1, the mold mounting portion where the mold is mounted is provided with a clamp that can move freely at a position where the mold is fixed and a position where the mold is not fixed, and a stopper for holding the clamp and releasing the hold. Blocks. Moreover, when changing the mold, the stopper is actuated to retract the holder to a position where the mold is not fixed, and the gap between the pair of flanges formed on the side surface of the mold and the pair of guide grooves formed on the mold mounting portion is released. By engaging, the old mold is slid outward and removed from the mold installation part. In addition, in order to engage the pair of flanges and the pair of guide grooves of the new mold, the mold is slid on the mold mounting portion, the stopper is actuated, and the holder is moved to a position where the mold is fixed. In addition, at this time, the mold is equipped with an operating tool that facilitates the insertion and extraction of the mold.

[Patent Document] Patent Document 1: PCT/JP2013/076495 Publication

[Problem to be Solved by the Invention] In addition, in the above-mentioned molding apparatus, it is necessary to operate the clamper and the stopper when replacing the mold, and the replacement takes time and labor. In particular, in the die-casting device, which is one of the molding devices, in recent years, the method of installing and removing molds by robots has been studied, and it is sought to have better operability than the structure of mold replacement described in Patent Document 1 mentioned above. Structure.

The present invention has been completed in view of the foregoing circumstances, and its object is to provide a die-casting device that can easily install and remove a mold.

[Means for Solving the Problem] The above-mentioned object of the present invention is achieved by the following structure. The present invention includes a fixed mold and a movable mold that can be moved in a manner capable of contacting and separating from the fixed mold in the opening and closing direction of the mold, wherein, At least one of the fixed mold and the movable mold includes: a mold; a mold base to which the mold is mounted; and a clamping mechanism having a traction bolt mounted on the mold and a A traction clamp capable of engaging and disengaging the traction bolt with a mold base, The mold base has a mold base main body and a cooling plate that is mounted on the mold base main body and has a cooling path formed inside, The traction clamp is arranged on the back side of the cooling plate, A through hole through which the traction bolt penetrates is formed in the cooling plate.

[Effects of the invention] According to the die-casting device of the present invention, the mold can be easily installed and removed from the mold base by the clamping mechanism having the traction bolt and the traction jig. For example, the mold can be replaced by a robot. . In addition, since the traction jig is arranged on the back side of the cooling plate, the cooling performance can be maintained without increasing the size of the mold base.

Hereinafter, a die cast device according to an embodiment of the present invention will be described in detail based on the drawings. In addition, in the following description, regarding the fixed mold and the movable mold, the mold opening and closing direction is the direction of mold closing and mold opening, and is indicated as the X direction in the figure. In addition, the width direction and the left-right direction are horizontal directions orthogonal to the X direction, and are shown as the Y direction in the figure. In addition, the up-down direction is a vertical direction orthogonal to the X direction, and is shown as the Z direction in the figure.

As shown in FIG. 1, the die casting device 1 includes a fixed mold 2 and a movable mold 3 that can be moved in a manner capable of contacting and separating from the fixed mold 2 in the mold opening and closing direction.

As also shown in FIG. 2, the fixed mold 2 includes a pair of fixed side molds 10 having a cavity 10 a and a fixed side mold base 20 on which the pair of fixed side molds 10 are mounted. In addition, the movable mold 3 includes a pair of movable side molds 40 having a cavity 40 a and a movable side mold base 50 on which the pair of movable side molds 40 are mounted.

The movable mold 3 is moved in the mold opening and closing direction along a tie bar 4 through a mold clamping position shown by a solid line in FIG. 1 and a mold opening position shown by a virtual line using a mold clamping cylinder not shown. When the movable mold 3 is moved to the mold clamping position and the mold is clamped, the fixed mold 10 and the movable mold 40 are in contact with each other. In addition, by moving the movable mold 3 to the mold opening position to open the mold, the fixed mold 10 of the fixed mold 2 and the movable mold 40 of the movable mold 3 are separated, and the fixed mold 10 and the movable mold 40 are replaced in the mold opened state. Side mold 40.

In this embodiment, the fixed side mold base 20 of the fixed mold 2 is mounted on the platen of the die-casting machine using a template not shown, and a nozzle (not shown) is directed to the cavities 10a of the fixed side mold 10 and the movable side mold 40. 40a is filled with molten liquid.

As shown in Figures 3 to 6, the fixed side mold base 20 has a mold base body 21, a cooling plate 22 mounted on the mold base body 21 and supporting the back of a pair of fixed side molds 10, and a front mounted on the cooling plate 22. The surface is a center block 23 between the opposing surfaces of a pair of fixed-side molds 10 that can be abutted by each opposing surface.

In the fixed side mold base 20, a pair of mold arranging portions 20a are formed. In the state where the cooling plate 22 and the center block 23 are mounted on the mold base body 21, the mold arranging portion 20a supports at least the left and right sides of the pair of fixed side molds 10 A pair of fixed-side molds 10 are arranged in a side-wise manner.

As shown in FIGS. 5 and 6, two cooling paths 24 are formed inside the cooling plate 22. The two cooling paths 24 extend parallel to each other along the width direction of the fixed side mold base 20 at positions at the same distance from the vertical middle position CP of each fixed side mold 10. When viewed from the mold opening and closing direction, the two cooling paths 24 are in positions overlapping with the two cavities 10a and 10a that are respectively arranged up and down with respect to the up and down direction intermediate position CP. In addition, as schematically shown in FIG. 5, the two cooling paths 24 are connected to each other on one side in the width direction, and an inflow port and an outflow port are provided on the other side in the width direction. Thus, during casting, the molten material in the cavity is cooled by the cooling medium flowing in the cooling path 24 via the pair of fixed-side molds 10.

The center block 23 is arranged at an intermediate position in the width direction of the mold base main body 21 so as to extend in the up-down direction. A sprue 25 and a pair of runners 26 continuous with the sprue 25 are provided in the middle part of the center block 23 in the up-down direction; the sprue 25 transports the molten material from the nozzle. The pair of runners 26 supply the molten material toward the cavity 10a of the pair of fixed side molds 10 and the cavity 40a of the movable side mold 40.

In addition, the fixed mold 2 includes a clamp mechanism 30 for attaching and detaching the fixed mold 10 with respect to the fixed mold base 20. The clamping mechanism 30 has a traction bolt 31 attached to the fixed side mold 10 and a traction jig 35 which is arranged on the fixed side mold base 20 and can engage and disengage the traction bolt 31.

As shown in FIG. 6, the pulling jig 35 is arranged on the back side of the cooling plate 22 and is housed in the space formed in the fixed side mold base 20. Therefore, a through hole 27 through which a pull bolt 31 penetrates is formed in the cooling plate 22. In addition, the through hole 27 through which the traction bolt 31 penetrates may be formed at a position that does not interfere with the cooling path 24. From the viewpoint of miniaturization of the fixed mold 2, as shown in FIG. 5, when viewed from the mold opening and closing direction, The cooling path 24 of the cooling plate 22 is arranged at a position overlapping with a pull clamp 35. It is assumed that in the case where the traction jig is provided in the fixed side mold 10, heat will be stuffed in the mold 10 during molding, and the quality of the product cannot be ensured. For example, when the zinc alloy is injected, the temperature in the cavity 10a of the mold 10 excessively rises, and the zinc alloy adheres (zinc adhesion). On the other hand, by disposing the traction jig 35 on the back side of the cooling plate 22, the cooling performance is ensured, and the quality of the product becomes good.

In addition, as shown in FIG. 6, the traction bolt 31 needs to penetrate the cooling plate 22 to be engaged with the traction jig 35 and have a length. Therefore, in the present embodiment, the traction bolt 31 is composed of two members, namely: a traction bolt body 32 that is engaged with and disengaged from the traction jig 35 and has a threaded joint 32a on the base end side; and an installation jig 33 The threaded joint portion 32 a is screwed to the mounting jig 33, and the mounting jig 33 is used to fix the traction bolt main body 32 to the fixed side mold 10. The mounting jig 33 is fixed to the back surface of the fixed side mold 10. In addition, the engagement and removal of the traction bolt 31 and the traction jig 35 adopt a known structure. For example, by switching the supply and discharge of air according to a signal from a circuit not shown, a plurality of balls are engaged with the traction bolt 31. The contraction part or the release of the engagement of the plurality of balls with respect to the contraction part of the traction bolt 31 realizes the engagement, attachment and detachment of the traction bolt 31 and the traction jig 35. In addition, the traction bolt main body 32 is screwed to the mounting jig 33, but it may be fixed to the mounting jig 33 by another structure.

Next, the movable mold 3 will also be described with reference to FIGS. 7 to 11. The movable side mold base 50, like the fixed side mold base 20, has a mold base body 51, a cooling plate 52 mounted on the mold base body 51 and supporting the back of a pair of movable side molds 40, and a front surface of the cooling plate 52. Between the opposing surfaces of a pair of movable side molds 40, the center block 53 can be contact|abutted by each opposing surface, respectively.

The pair of mold arranging portions 50 a formed by the movable side mold base 50 for arranging the pair of movable side molds 40 also have substantially the same size as the pair of mold arranging portions 20 a of the fixed side mold base 20. Therefore, the mold base main body 51, the cooling plate 52, and the center block 53 have substantially the same dimensions as the members of the fixed side mold base 20.

In addition, the movable mold 3 also includes a movable-side clamping mechanism 70 for attaching and detaching the movable-side mold 40 to the movable-side mold base 50. The cooling plate 52 is also formed with two cooling paths 54 similarly to the cooling plate 22 of the fixed mold 2, and a through hole 67 through which the traction bolt 71 of the movable-side clamping mechanism 70 penetrates is formed. The traction bolt 71 and the traction jig 75 of the movable side clamping mechanism 70 also have substantially the same structure as the traction bolt 31 and the traction jig 35 of the fixed side clamping mechanism 30. That is, the traction bolt 71 also has: a traction bolt main body 72 that has a threaded joint portion 72a on the base end side and is engaged with and disengaged from the traction jig 75; A tool 73 for fixing the traction bolt main body 72 to the movable mold 40. In addition, the through hole 67 through which the traction bolt 71 penetrates may be formed at a position that does not interfere with the cooling path 54. From the viewpoint of miniaturization of the movable mold 3, as shown in FIG. 8, when viewed from the mold opening and closing direction, The cooling path 54 of the cooling plate 52 is arranged at a position overlapping with the pulling jig 75. It is assumed that when the traction jig is provided in the movable side mold 40, heat will become stuffy in the mold 40 during molding, and the quality of the product cannot be ensured. For example, when the zinc alloy is injected, the temperature in the cavity 40 a of the mold 40 excessively rises, and the zinc alloy adheres (zinc adhesion). On the other hand, by disposing the traction jig 75 on the back side of the cooling plate 52, the cooling performance is ensured, and the quality of the product becomes good.

As shown in FIG. 8, when viewed from the mold opening and closing direction, the position of the movable side clamping mechanism 70 is separated from the center in the mold arranging portion 50a on the left, and is arranged below the middle position CP in the vertical direction, and is arranged on the right mold. The part 50a is separated from the center, and is arranged above the middle position CP in the vertical direction. This is the same as the arrangement position of the fixed side clamping mechanism 30 shown in FIG. 3, but when the fixed mold 2 and the movable mold 3 are viewed from the mold opening and closing direction in the closed state, the traction jig 35 on the fixed side and the traction on the movable side The clamps 75 are arranged at positions that are line-symmetrical to each other with respect to the middle position CP in the vertical direction. Specifically, as shown in FIG. 1, the fixed-side clamping mechanism 30 that engages and disengages the fixed-side mold 10 on one side in the width direction (the right side of FIG. The movable-side clamping mechanism 70 in which the fixed-side mold 10 is engaged and disengaged (on the right side of FIG. 7) is located below the middle position CP in the vertical direction. In addition, the fixed-side clamping mechanism 30 on the other side in the width direction is located below the intermediate position CP in the vertical direction, and the movable-side clamping mechanism 70 on the other side in the width direction is located above. As a result, during casting, the reaction force received by the mold holders 20, 50 and the reaction force received by the mold holders 20, 50 through the clamping mechanism 30, 70 that act when the mold 10, 40 is subjected to the injection pressure from the molten material can be made The forces are balanced in the area of the cavity (the YZ plane perpendicular to the X direction).

In addition, in this embodiment, by making the positions of the clamping mechanisms 30 and 70 further different on one side in the width direction and the other side in the width direction, the magnitude of the reaction force with respect to the injection pressure can be changed Balance between a pair of cavities.

In addition, at the positions farthest from the traction bolts 31, 71 of the mold cavities 10a, 40a, the injection pressure from the molten material tends to become greater than the reaction force received by the mold holders 20, 50 when the mold is closed. If the mold is slightly opened, Molded products will have burrs. Therefore, the positions of the traction bolts 31 and 71 are determined in consideration of the layout of the cavity, the flow of the melt, the injection pressure, and the relative traction jigs 35 and 75.

The center block 53 is also arranged at an intermediate position in the width direction of the mold base main body 51 so as to extend in the vertical direction. Thus, the center block 23 of the fixed mold 2 and the center block 53 of the movable mold 3 are opposed to each other in the mold opening and closing direction.

Ejector pins 55 and 56 for releasing the molded product from the cavity 40a are arranged on the movable side mold base 50 so as to be able to advance and retreat. One ejector pin 55 is arranged at a position where the center block 53 communicates with the runner 26 of the fixed side mold base 20 in a state where the fixed mold 2 and the movable mold 3 are closed. Specifically, a melt tank 58 is formed in the center block 53. The melt tank 58 extends in the vertical direction with respect to the taper-shaped sprue lock pin 57 opposed to the sprue 25 and communicates with the sprue 26. , The thimble 55 is arranged so as to advance and retreat with respect to the upper and lower two places of the melt tank 58. Moreover, the other ejector pin 56 is arrange|positioned in the up-down direction intermediate position of the mold arrangement|positioning part 50a so that the cooling plate 52 and the movable side mold 40 may penetrate.

As shown in FIG. 9, a support block 60 is connected to the rear of the mold base main body 51 of the movable mold 3 via a connecting portion 59, and there is a space 61 between the mold base main body 51 and the support block 60 in the mold opening and closing direction.

The movable body 62 to which the thimbles 55 and 56 are fixed is installed in the space portion 61 so as to be freely movable in the mold opening and closing direction. In addition, the actuating rod 63 attached to the movable body 62 is arranged in the support block 60 and protrudes from the support block 60, and is moved in the mold opening and closing direction by a cylinder not shown.

As shown in FIG. 11, the thimble 56 penetrates the through hole 64 of the movable side mold base 50, the through hole 65 of the cooling plate 52, and the through hole 42 of the movable side mold 40. On the other hand, the tip of the thimble 56 is located on the movable side mold. The position where the surface of the runner 40 is submerged.

According to the arrangement of the ejector pins 55 and 56, only the ejector pin 56 penetrates the movable side mold 40. Therefore, when replacing the mold, the ejector pin 56 can be aligned with the through hole 42 of the movable side mold 40. The mold arrangement part 50a of the seat 50 mounts the movable side mold 40. As shown in FIG.

In addition, when ejecting the molded product, move the movable body 62 in the mold opening and closing direction, move the ejector pins 55, 56 to the ejection position protruding from the surface of the movable mold 40, and push the molded product in the cavity to eject it. .

With this structure, as long as the mold is opened, the fixed mold 10 and the movable mold 40 can be installed and removed. When the fixed mold 2 is installed in the die-casting machine, the movable mold 3 can be moved to the mold opening position. By moving and opening the mold, the fixed side mold 10 and the movable side mold 40 can be replaced.

In addition, the present invention is not limited to the above-mentioned embodiment, and can be modified and improved as appropriate within the scope not departing from the gist of the present invention. In this embodiment, the fixed side mold base 20 is provided with a pair of mold placement portions 20a, and the movable side mold base 50 is provided with a pair of mold placement portions 50a. However, one mold placement portion 20a and one mold placement portion 50a may be provided. In addition, for the two cavities 10a and 10a, the shape 10a of one of them may be a different shape from the shape 10a of the other. There may be one cavity 10a or three or more cavity 10a. The same applies to the cavities 40a and 40a.

In addition, the shape and structure of a pair of mold arrangement|positioning part 20a, 50a are not limited to this embodiment, and what is necessary is just to be able to position the mold 10,40 on the mold base 20,50.

In addition, in the present embodiment, the traction bolts 31, 71 are attached to the molds 10, 40 by means of mounting jigs 33, 73 that are different parts from the molds 10, 40, but the traction bolts 31, 71 may be directly attached to the molds 10, 40. Mold 10,40. For example, as shown in FIGS. 12( a) and 12 (b ), in the molds 10 and 40, the mounting protrusions 36 and 76 protruding from the back surfaces of the molds 10 and 40 are integrally formed with the molds 10 and 40. The traction bolts 31, 71 can also be installed by screwing the threaded coupling portions 32a, 72a of the traction bolt main bodies 32, 72 that are engaged with and disengaged from the traction jigs 35, 75 and the inner walls of the mounting protrusions 36, 76.于die 10,40.

In addition, in this embodiment, it is assumed that both the fixed mold 2 and the movable mold 3 have molds 10, 40, mold holders 20, 50, and clamping mechanisms 30, 70, respectively, but the present invention is not limited to this. It may also be a structure in which at least one of the fixed mold 2 and the movable mold 3 has a mold, a mold base, and a clamping mechanism. In this one, the mold base has a mold base main body and is mounted on the mold base main body and is A cooling plate with a cooling path is formed inside, a traction jig is arranged on the back side of the cooling plate, and a through hole through which a traction bolt penetrates is formed in the cooling plate.

As above, the following items are disclosed in this manual. (1) A die-casting device including a fixed mold and a movable mold capable of contacting and separating from the fixed mold in the opening and closing direction of the mold, wherein, At least one of the fixed mold and the movable mold includes: a mold; a mold base to which the mold is mounted; and a clamping mechanism having a traction bolt mounted on the mold and a A traction clamp capable of engaging and disengaging the traction bolt with a mold base, The mold base has a mold base main body and a cooling plate that is mounted on the mold base main body and has a cooling path formed inside, The traction clamp is arranged on the back side of the cooling plate, A through hole through which the traction bolt penetrates is formed in the cooling plate. With this structure, since the mold is mounted to the mold base by the clamping mechanism having the traction bolt and the traction jig, the mold can be easily installed and removed, and for example, the mold can be replaced by a robot. In addition, since the traction jig is arranged on the back side of the cooling plate, the cooling performance can be maintained without increasing the size of the mold base.

(2) The die casting device according to (1), wherein the cooling path of the cooling plate is arranged at a position overlapping with the pulling jig when viewed from the mold opening and closing direction. With this structure, the cooling performance is ensured, and the quality of the product becomes good. In addition, since the cooling path and the clamping mechanism are arranged close to each other, the mold base can be reduced in size, and both the cooling path and the clamping mechanism can be arranged at desired positions.

(3) The die-casting device according to (1), wherein the traction bolt has an installation jig for fixing the traction bolt main body that is engaged and disengaged with the traction jig to the mold. With this structure, it is possible to use the conventional traction bolt to form a traction bolt of the length required to penetrate the through hole of the cooling plate.

(4) The die-casting device according to (1), wherein the traction bolt is secured by fixing the traction bolt main body engaged and disengaged with respect to the traction jig to an attachment convex portion protruding from the back surface of the mold Installed in the mold. According to this structure, the traction bolt can be attached to the mold by the mounting convex portion provided on the back surface of the mold, and a traction bolt having a length that needs to penetrate the through hole of the cooling plate can be formed.

(5) The die-casting device according to (1), wherein the pulling jig of the fixed mold and the pulling jig of the movable mold are arranged at positions that are line-symmetrical to each other when viewed from the mold opening and closing direction . With this structure, during casting, the reaction force received by the mold base and the reaction force received by the mold base through the clamping mechanism can be balanced in the region of the mold cavity when the mold receives the injection pressure from the molten material.

(6) The die-casting device according to (1), wherein in the fixed mold and the movable mold, a pair of the molds are respectively mounted on the mold bases, and each mold base is provided with The center blocks between the opposing surfaces of the pair of molds that can be respectively abutted by the opposing surfaces, The center block of the fixed mold and the center block of the movable mold are opposed to each other in the mold opening and closing direction, The center block of the fixed mold is provided with a runner for supplying molten material toward the cavities of the pair of molds, In a state where the fixed mold and the movable mold are closed, the ejector pin for demolding the molded product is disposed in a position communicating with the runner in the center block of the movable mold so as to be able to advance and retreat. According to this structure, since the number of ejectors penetrating the mold can be reduced, the mold of the movable mold can be easily mounted on the mold base.

1: Die casting device 2: Fixed mold 3: Movable mold 4: tie bar 10: Fixed side mold 10a, 40a: mold cavity 20: Fixed side mold base 20a, 50a: Mold configuration department 21, 51: The main body of the mold base 22, 52: cooling plate 23, 53: Center block 24, 54: cooling path 25: Sprue 26: runner 27, 67: Through hole 30: Fixed side clamping mechanism 31, 71: traction bolt 32, 72: traction bolt main body 32a, 72a: threaded joint 33, 73: Installation fixture 35, 75: Towing fixture 40: Movable side mold 36, 76: Installation convex part 42: Through hole 50: Movable side mold base 55, 56: thimble 57: Straight gate locking pin 58: Melt Tank 59: Connection 60: Support block 61: Ministry of Space 62: movable body 63: Actuating lever 64, 65: through hole 70: movable side clamping mechanism CP: middle position

[01] FIG. 1 is a side view of the die casting device according to an embodiment of the present invention viewed from a direction orthogonal to the mold opening and closing direction. [02] FIG. 2(a) is a perspective view showing a fixed mold, and FIG. 2(b) is a perspective view showing a movable mold. [03] FIG. 3 is a front view of the fixed mold viewed from the mold opening and closing direction. [04] FIG. 4 is a perspective view showing a fixed side mold base. [05] FIG. 5 is a front view of the fixed side mold base viewed from the mold opening and closing direction. [06] FIG. 6 is a cross-sectional view of the fixed mold along the VI-VI line of FIG. 3. [07] FIG. 7 is a front view of the movable mold viewed from the mold opening and closing direction. [08] FIG. 8 is a front view of the movable side mold base viewed from the mold opening and closing direction. [09] FIG. 9 is a cross-sectional view along the line IX-IX of FIG. 7. [10] Fig. 10 is a cross-sectional view taken along line X-X in Fig. 7. [11] Fig. 11 is a cross-sectional view along the line XI-XI of Fig. 7. [12] Fig. 12(a) is a main part cross-sectional view showing a modification of the clamping mechanism of the fixed mold, and Fig. 12(b) is a main part cross-sectional view showing a modification of the clamping mechanism of the movable mold. [13]

1: Die casting device

2: Fixed mold

3: Movable mold

4: tie bar

10: Fixed side mold

20: Fixed side mold base

21, 51: The main body of the mold base

22, 52: cooling plate

30: Fixed side clamping mechanism

31, 71: traction bolt

35, 75: Towing fixture

40: Movable side mold

50: Movable side mold base

70: movable side clamping mechanism

Claims (6)

A die-casting device (1) includes a fixed mold (2) and a movable mold (3) that can be moved in a manner capable of contacting and separating from the fixed mold (2) in the opening and closing direction of the mold, wherein, At least one of the fixed mold (2) and the movable mold (3) includes: a mold (10, 40); a mold base (20, 50) on which the mold (10, 40) is installed (20, 50); and a clamping mechanism (30, 70), which has traction bolts (31, 71) installed on the mold (10, 40) and arranged on the mold base (20, 50) and can The traction clamps (35, 75) for engaging and disengaging the traction bolts (31, 71), The mold base (20, 50) has a mold base main body (21, 51) and a cooling plate (22, 52) mounted on the mold base main body (21, 51) and formed with a cooling path (24, 54) inside , The traction clamp (35, 75) is arranged on the back side of the cooling plate (22, 52), The cooling plates (22, 52) are formed with through holes (27, 67) through which the traction bolts (31, 71) pass. The die-casting device according to claim 1, wherein: When viewed from the mold opening and closing direction, the cooling path (24, 54) of the cooling plate (22, 52) is arranged at a position overlapping with the pulling jig (35, 75). The die-casting device according to claim 1, wherein: The traction bolts (31, 71) have installation jigs (33, 73), and the installation jigs (33, 73) are used to engage and disengage the traction bolt main body ( 32, 72) fixed to the mold (10, 40). The die-casting device according to claim 1, wherein: The traction bolts (31, 71) are fixed to the protruding from the back of the mold (10, 40) by fixing the traction bolt main body (32, 72) that is engaged with and disengaged from the traction jig (35, 75) The convex part (36, 76) is attached, and it is attached to the said mold (10, 40). The die-casting device according to claim 1, wherein: The pulling jig (35) of the fixed mold (2) and the pulling jig (75) of the movable mold (3) are arranged at positions line-symmetrical to each other when viewed from the opening and closing direction of the mold. The die-casting device according to claim 1, wherein: In the fixed mold (2) and the movable mold (3), a pair of the molds (10, 40) are respectively mounted on the mold bases (20, 50), and in each mold base (20) , 50) is provided with a center block (23, 53) between the opposing surfaces of the pair of molds (10, 40) that can be respectively abutted against each of the opposing surfaces, The center block (23) of the fixed mold (2) and the center block (53) of the movable mold (3) are opposed to each other in the mold opening and closing direction, The center block (23) of the fixed mold (2) is provided with a runner (26) for supplying molten material to the cavities of the pair of molds (10, 40), In the state where the fixed mold (2) and the movable mold (3) are closed, the ejector pin (55) for ejecting the molded product is arranged on the center block (53) of the movable mold (3) so as to be able to advance and retreat ) Is connected to the runner (26).

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