Die-cast device and method of molding

Abstract

To obtain a die-cast device and method of molding allowing for diminishing the number of parts.SOLUTION: A die-cast device 10 moves a slide-push plate 42 and a slide-push pin 44 relative to a slide core 20 or the slide-push plate 42 and the slide-push pin 44 in one body with the slide core 20, following up the movement of the slide core 20 by a cam mechanism 49. This allows for eliminating the need of an exclusive hydraulic cylinder for moving the slide-push plate 42 and the slide-push pin 44 and diminishing the number of parts in the die-cast device.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a die-casting apparatus and a molding method. [Background technology]

[0002] Patent Document 1 discloses a technique related to a die-casting device. In this prior art, in the process of opening the mold, the movable mold is moved in a direction away from the fixed mold while the extrusion mechanism pushes out the molded product and releases it from the mold. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-200777 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned prior art, in addition to the mechanism for moving the movable mold, a separate mechanism for pushing out the molded product is also required, which increases the number of parts of the device.

[0005] SUMMARY OF THE PRESENT INVETION The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a die-casting apparatus and a molding method that are capable of reducing the number of parts. [Means for solving the problem]

[0006] The die-casting apparatus of the present invention described in claim 1 comprises a fixed mold constituting a part of a mold, a movable mold constituting a part of another part of the mold, which is arranged to be movable toward and away from the fixed mold, a cavity being formed between the fixed mold and the movable mold when in contact with the fixed mold and capable of molding a molded product within the cavity, a slide core which is arranged on the movable mold side and is movable in a direction intersecting the moving direction of the movable mold and molds the molded product together with the fixed mold and the movable mold, and a cam mechanism which moves an extrusion member which releases the molded product from the slide core relative to the slide core in response to the movement of the slide core, or which moves the extrusion member integrally with the slide core.

[0007] The die-casting device according to the present invention described in claim 1 includes a fixed mold, a movable mold, a slide core, and a cam mechanism. At least a part of the die is constituted by the fixed mold and the movable mold, and the movable mold is capable of approaching and releasable from the fixed mold. With the movable mold in contact with the fixed mold, a cavity is formed between the fixed mold and the movable mold. A molded product is molded in this cavity. The slide core is provided on the movable mold side and is capable of moving in a direction intersecting the moving direction of the movable mold. The slide core molds the molded product together with the fixed mold and the movable mold. That is, in the present invention, a cavity is formed by the fixed mold, the movable mold, and the slide core, and a molded product is molded in the cavity.

[0008] Here, the slide core is movable in a direction intersecting the moving direction of the movable die. A cam mechanism allows a pusher member for releasing a molded product from the slide core to move relative to the slide core in response to the movement of the slide core, or allows the pusher member to move integrally with the slide core.

[0009] Generally, after the mold is opened by moving the movable side relative to the fixed side, the molded product held on the movable mold and slide core side is released from the slide core side, and then released from the movable mold side and taken out of the mold. In the present invention, a cam mechanism is used for releasing from the slide core side, and when the molded product is released from the slide core by the cam mechanism, the molded product is pushed out by the extrusion member.

[0010] For example, the ejection member is a pusher plate provided on the slide core side and equipped with multiple ejector pins, which is movable along the moving direction of the slide core. The molded product is released from the slide core by moving this pusher plate and causing the tip faces of the multiple ejector pins to protrude from the surface of the slide core. In other words, the ejection member moves relative to the slide core. On the other hand, when releasing the molded product from the movable mold side, the slide core must be moved away from the moving trajectory of the molded product in advance. At that time, it must be moved together with the slide core.

[0011] Generally, a dedicated hydraulic cylinder is used to move the pressing member. In contrast, in the present invention, the cam mechanism moves the pusher member relative to the slide core in response to the movement of the slide core, or moves the pusher member integrally with the slide core. In other words, in the present invention, a dedicated hydraulic cylinder for the pusher member to move the pressing member is not required. This makes it possible to reduce the number of parts in the die casting device.

[0012] The die-casting apparatus of the present invention as described in claim 2 is the die-casting apparatus of the present invention as described in claim 1, wherein the cam mechanism includes a lock pin that is movable via a tracing portion inserted into the cam groove, engages with the extrusion member and is engageable with an engaged portion provided on the movable mold side, and when engaged with the engaged portion allows the extrusion member to move relative to the slide core, and when the engagement with the engaged portion is released, allows the extrusion member to move integrally with the slide core.

[0013] In the die-casting device according to the present invention described in claim 2, the cam mechanism includes a cam groove and a lock pin. The cam groove is provided on the slide core side. The lock pin is provided with a tracing portion, and the tracing portion is inserted into the cam groove, and the lock pin moves via the tracing portion along the shape of the cam groove.

[0014] The lock pin is engaged with the push-out member and is also engageable with an engaged portion provided on the movable mold side, and when the lock pin engages with the engaged portion provided on the movable mold side, the push-out member is fixed to the movable mold side via the lock pin. When the slide core slides in this state, the push-out member is movable relative to the slide core. In other words, it becomes possible to release the molded product from the slide core.

[0015] On the other hand, when the lock pin is released from the engaged portion, the ejection member is allowed to move together with the slide core, which makes it possible to move the ejection member together with the slide core from the path of movement of the molded product before the molded product is released from the movable mold side.

[0016] In this way, with a simple configuration, it is possible to move the pressing member relative to the slide core or to move the pressing member integrally with the slide core in response to the movement of the slide core, thereby making it possible to implement the present invention at low cost.

[0017] The molding method of the present invention as set forth in claim 3 is a molding method using the die-casting apparatus as set forth in claim 1, and includes the following steps: a mold clamping step in which the movable mold is brought into contact with the fixed mold; a molding step in which a molded product is formed by filling the cavity with molten material and cooling it; a mold opening step in which the movable mold and the sliding core move in a direction away from the fixed mold; a slide core releasing step in which the pusher member is made movable relative to the slide core via the cam mechanism, and the slide core is moved relative to the movable mold to release the molded product from the slide core; a slide core moving step in which the pusher member moves integrally with the slide core via the cam mechanism in a direction away from the molded product; and a movable mold releasing step in which the molded product is released from the movable mold.

[0018] The molding method according to the present invention as set forth in claim 3 includes a mold clamping step, a molding step, a mold opening step, a slide core releasing step, a slide core moving step, and a movable mold releasing step. First, in the mold clamping step, the movable mold is brought into contact with the fixed mold, and the mold is clamped. Then, in the molding step, a molten material is filled in a cavity formed by the fixed mold, the movable mold, and the slide core, and cooled to form a molded product. In the mold opening step, the movable mold and the slide core are moved in a direction away from the fixed mold, and the mold is opened.

[0019] Next, the slide core demolding step allows the pusher member to move relative to the slide core via the cam mechanism, moving the slide core relative to the movable mold and releasing the molded product from the slide core. Then, the slide core moving step moves the pusher member and the slide core in a direction away from the molded product via the cam mechanism. Next, the movable mold demolding step releases the molded product from the movable mold. This makes it possible to remove the molded product.

[0020] In this way, in the present invention, the cam mechanism can move the pusher member relative to the slide core or move the pusher member integrally with the slide core in response to the movement of the slide core. Therefore, in the present invention, only a hydraulic cylinder for moving the slide core is required, and a hydraulic cylinder dedicated to the pusher member for moving the pressing member is not required. This makes it possible to reduce the number of parts in the die casting device. The molded product can be made of metal such as aluminum alloy or magnesium alloy, but may also be made of resin, FRP, or the like other than metal.

[0021] The molding method of the present invention described in claim 4 is the molding method described in claim 3, wherein, in the slide core releasing process, the push-out member is locked to the movable mold side via the cam mechanism, and, in the slide core moving process, the state in which the push-out member is locked to the movable mold side via the cam mechanism is released.

[0022] In the molding method according to the present invention as set forth in claim 4, in the slide core releasing step, the pushing member is locked to the movable die side via the cam mechanism. This allows the pushing member to move relatively to the slide core. Also, in the slide core moving step, the state in which the pushing member is locked to the movable die side is released via the cam mechanism. This allows the pushing member to move integrally with the slide core. Effect of the Invention

[0023] As described above, the die-casting apparatus and molding method according to the present invention can reduce the number of parts. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1A is a cross-sectional view of a mold used in a die-casting apparatus according to the present embodiment, showing a mold clamping process and a molding process, FIG. 1B is a mold opening process, and FIG. 1C is a cross-sectional view of a mold used in a die-casting apparatus according to the present embodiment, seen from a side. [Diagram 2]1A and 1B are cross-sectional views of a mold used in a die-casting machine according to the present embodiment, showing a slide core moving step and FIG. 1C is a cross-sectional view of a mold used in a die-casting machine according to the present embodiment, seen from a side direction, respectively. [Diagram 3] 1(B) is an enlarged view of a main part of a die used in a die-casting apparatus according to the present embodiment, showing a cross-sectional view taken from a plane direction corresponding to FIG. 1(A), and FIG. [Figure 4] 1(B) is an enlarged view of a main part of a die used in a die-casting apparatus according to the present embodiment, showing a cross-sectional view taken from a plane direction corresponding to FIG. 1(C), and FIG. [Diagram 5] 2(B) is an enlarged view of a main part of a die used in a die-casting apparatus according to the present embodiment, showing a cross-sectional view taken from a plane direction corresponding to FIG. 2(A), and FIG. 2(B) is an enlarged view of a main part of FIG. [Figure 6] FIG. 3 is a cross-sectional view of a mold used in a die-casting apparatus according to the present embodiment, seen from a planar direction corresponding to FIG. 2(B), where (B) is an enlarged view of a main part in (A). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a die casting apparatus according to an embodiment of the present invention will be described with reference to the drawings. (Die casting equipment configuration) First, the configuration of the die casting machine according to the present embodiment will be described.

[0026] Fig. 1(A) shows a cross-sectional view seen from the side of a die-casting apparatus 10 according to this embodiment. The die-casting apparatus 10 shown in Fig. 1(A) is an apparatus for molding a metal molded product 12 made of a material such as an aluminum alloy, a magnesium alloy, or the like, and the die-casting apparatus 10 is provided with a die 14 for molding the molded product 12.

[0027] 1(A) shows a state in which the mold 14 is clamped. The mold 14 includes a fixed mold 16 and a movable mold 18, and a slide core 20 is provided on the movable mold 18 side. The slide core 20 is movable along a direction (arrow B direction) intersecting the moving direction of the movable mold 18 (arrow A direction).

[0028] In this embodiment, when the mold 14 is clamped, a cavity 22 is formed by the fixed die 16, the movable die 18, and the slide core 20. Strictly speaking, the cavity 22 is formed by a fixed insert 26, a movable insert 30, and a slide insert 38, which will be described later. Molten material is then filled into the cavity 22 and cooled, thereby forming the molded product 12.

[0029] 1(A), the fixed mold 16 is configured to include a fixed main mold 24 and a fixed insert 26, the fixed main mold 24 is provided on the outside of the mold 14, and the fixed insert 26 is provided on the inside of the fixed main mold 24. The movable mold 18 is configured to include a movable main mold 28 and a movable insert 30, the movable main mold 28 is provided on the outside of the mold 14, and the movable insert 30 is provided on the inside of the movable main mold 28.

[0030] The movable die 18 is capable of approaching (moving) and separating from the fixed die 16 in the direction of arrow A. In addition, a movable pusher plate 32 is provided on the movable die 18 side. The movable pusher plate 32 is provided on the outside of the movable die 18, and a plurality of movable pusher pins 34 are provided on the movable pusher plate 32. These movable pusher pins 34 pass through the movable main die 28 and the movable insert 30, and are capable of coming into contact with the surface of the molded product 12.

[0031] In addition, the movable extrusion plate 32 and the movable extrusion pin 34 are movable relative to the movable main mold 28 and the movable nest 30, and the movable extrusion pin 34 presses against the surface of the molded product 12 and protrudes from the surface of the movable nest 30, making it possible to release the molded product 12 from the movable nest 30.

[0032] On the other hand, the slide core 20 is configured to include a slide holder 36 and a slide insert 38, the slide holder 36 is provided on the outside of the mold 14, and the slide insert 38 is provided at the tip of the slide holder 36. The slide holder 36 is movable with respect to the movable mold 18, and a protruding portion 28A formed by a part of the movable main mold 28 protruding is provided on the outside of the slide holder 36, and the outside of the slide holder 36 is surrounded by the protruding portion 28A.

[0033] In addition, a slide push-out plate 42 (described later) is provided on the slide core 20 side, and a plurality of slide push-out pins 44 are provided on the slide push-out plate 42. These slide push-out pins 44 penetrate the slide holder 36 and the slide insert 38, and are capable of coming into contact with the surface of the molded product 12.

[0034] In addition, the slide push-out plate 42 and the slide push-out pin 44 are movable relative to the slide holder 36 and the slide insert 38, and the slide push-out pin 44 presses against the surface of the molded product 12 and protrudes from the surface of the slide insert 38, making it possible to release the molded product 12 from the slide insert 38.

[0035] Here, Fig. 3(A) shows a cross-sectional view seen from a plane direction corresponding to Fig. 1(A), and Fig. 3(B) shows an enlarged view of the main part in Fig. 3(A). As shown in Figs. 3(A) and (B), in this embodiment, the slide holder 36 (slide core 20) is movable relative to the movable die 18 via, for example, a hydraulic cylinder 40. A storage section 46 is provided in the slide holder 36. A slide push plate 42 is capable of being stored in the storage section 46, and the slide push plate 42 is capable of being moved in the direction of the arrow B in the storage section 46.

[0036] 1(A), 3(A) and (B), an engagement recess 42A is formed in the vertical center of the slide push plate 42 and at both ends in the longitudinal direction of the slide push plate 42. Note that, although the longitudinal direction of the slide push plate 42 is described as being horizontal here, the longitudinal direction of the slide push plate 42 may be vertical.

[0037] Furthermore, for example, one longitudinal end 48A of a cylindrical lock pin 48 is engaged in the engaging recess 42A, and the lock pin 48 passes through the slide holder 36. An engaged recess (engaged portion) 28A1 is formed in the protruding portion 28A of the movable main mold 28 provided on the outside of the slide holder 36, and the other longitudinal end 48B of the lock pin 48 is engaged in the engaged recess 28A1.

[0038] The shape of the lock pin 48 is not limited to a cylindrical shape, and may be a prismatic shape. When the lock pin 48 is shaped like a prismatic column, the contact area can be increased more than when the lock pin 48 is shaped like a cylinder. For this reason, the cross-sectional shape of the engagement portion of the lock pin 48 may be changed.

[0039] On the other hand, the slide holder 36 is formed with a cam groove 50 constituting a part of the cam mechanism 49 at a position facing the engaging recess 42A formed in the slide push plate 42. The cam groove 50 is configured to include a parallel portion 50A and an inclined portion 50B. The parallel portion 50A is formed so as to be substantially parallel to the moving direction of the slide push plate 42. The inclined portion 50B is provided on the slide insert 38 side from the parallel portion 50A, and is inclined toward a direction away from the extension portion 28A of the movable main mold 28 (toward the slide push plate 42) as it moves away from the parallel portion 50A.

[0040] Further, a cam roller (trace portion) 52, which is provided on the lock pin 48 and constitutes another part of the cam mechanism 49, can be inserted into the cam groove 50 and can move along the shape of the cam groove 50. The lock pin 48 can move within the slide holder 36 via this cam roller 52.

[0041] 3(A) and (B), in a state where the cam roller 52 is disposed in the parallel portion 50A of the cam groove 50, one end 48A of the lock pin 48 is engaged with the engaging recess 42A of the slide push plate 42, and the other end 48B of the lock pin 48 is engaged with the engaged recess 28A1 formed in the protruding portion 28A of the movable main die 28 (locked state). This restricts the movement of the slide push plate 42.

[0042] 4(A) and (B), when the slide holder 36 (slide core 20) moves (retracts), the slide push-out plate 42 moves relative to the slide holder 36 because its movement is restricted. Furthermore, the movement of the slide holder 36 causes the cam roller 52 to move along the cam groove 50. In this state, a gap is provided between one end 48A of the lock pin 48 and the engagement recess 42A of the slide push-out plate 42.

[0043] 5(A) and (B), in a state in which the cam roller 52 is disposed on the inclined portion 50B of the cam groove 50, the cam roller 52 moves toward the accommodation portion 46 as the slide holder 36 moves backward. Therefore, one end portion 48A of the lock pin 48 moves further to the back of the engagement recess 42A of the slide push-out plate 42 via the cam roller 52.

[0044] As a result, the other end 48B of the lock pin 48 is released from the engaged state with the engaged recess 28A1 of the movable main die 28 (unlocked state). Therefore, as shown in Figures 6(A) and (B), the slide push-out plate 42 is allowed to move integrally with the slide holder 36 (slide core 20).

[0045] (Actions and Effects of Die Casting Equipment) Next, the operation and effects of the die casting apparatus according to this embodiment will be described.

[0046] 1(A), 3(A) and (B), the die-casting device 10 according to this embodiment includes a fixed mold 16, a movable mold 18, a slide core 20 and a cam mechanism 49. In this embodiment, the slide core 20 is provided on the movable mold 18 side, and a cavity 22 is formed by the fixed mold 16, the movable mold 18 and the slide core 20, and a molded product 12 is molded in the cavity 22.

[0047] The slide core 20 is movable in a direction (arrow B direction) intersecting the moving direction of the movable die 18. Following the movement of the slide core 20, a cam mechanism 49 allows the slide push plate 42 and slide push pins 44, which release the molded product 12 from the slide core 20 side, to move relatively to the slide core 20, or allows the slide push plate 42 to move integrally with the slide core 20.

[0048] Here, a molding method using the die-casting apparatus 10 according to this embodiment will be described.

[0049] The molding method according to this embodiment includes a mold clamping step, a molding step, a mold opening step, a slide core releasing step, a slide core moving step, and a movable mold releasing step. Figure 1(A) and Figures 3(A) and (B) show the mold clamping step and molding step of the mold 14, and Figure 1(B) shows the mold opening step of the mold 14. Figure 1(C) and Figures 4(A) and (B) show the slide core releasing step. Figure 2(A) and Figures 5(A) and (B), Figure 2(B) and Figures 6(A) and (B) show the slide core moving step, and Figure 2(C) shows the movable mold releasing step.

[0050] 1(A), 3(A) and (B), in the mold clamping process of the metal mold 14, the movable mold 18 is brought into contact with the fixed mold 16. In this embodiment, a hollow portion 22 is formed by a fixed insert 26 provided in the fixed mold 16, a movable insert 30 provided in the movable mold 18 and a slide insert 38 provided in the slide core 20. Then, in the molding process, the hollow portion 22 is filled with molten material and cooled to form the molded product 12.

[0051] Here, the slide push-out plate 42 is in a locked state with respect to the movable main die 28 via the cam mechanism 49. In other words, the cam roller 52 is disposed in the parallel portion 50A of the cam groove 50, the other end 48B of the lock pin 48 is engaged with the engaged recess 28A1 of the movable main die 28, and the movement of the slide push-out plate 42 is restricted.

[0052] 1(B), in the mold opening process of the metal mold 14, the movable mold 18 and the slide core 20 move together in a direction away from the fixed mold 16. At this time, the molded product 12 is released from the fixed insert 26.

[0053] 1(C) and 4(A) and (B), in the slide core demolding step, the slide holder 36 retreats. Here, as described above, the slide push-out plate 42 is locked to the movable main mold 28 via the cam mechanism 49, so when the slide holder 36 retreats, the slide push-out plate 42 moves relative to the slide holder 36 (slide core 20). Therefore, when the slide holder 36 moves, the slide push-out pin 44 protrudes from the surface of the slide insert 38. This makes it possible to demold the molded product 12 from the slide insert 38.

[0054] In this manner, in this embodiment, the slide push-out plate 42 moves relative to the slide holder 36, thereby enabling the slide push-out pin 44 to perform the pushing operation in perfect synchronization with the retreat amount of the slide holder 36. As a result, while the molded article 12 is held in the slide insert 38, the slide push-out pin 44 can gradually release the molded article 12 from the slide insert 38, thereby suppressing deformation of the molded article 12.

[0055] Also, as a comparative example (not shown), when the slide holder is moved backward by a hydraulic cylinder while the slide pusher plate is pushed forward by another hydraulic cylinder, if oil is supplied to multiple cylinders from one oil system (pump), the cylinder with the least resistance will move first. Therefore, if the movement of the cylinder dedicated to the slide pusher plate is delayed due to the slide holder being moved backward, the slide pusher pin will not function. For this reason, in the comparative example, it is necessary to provide a distribution valve, such as a separate hydraulic pump.

[0056] In contrast, in this embodiment, since the slide push-out pin 44 can be moved relatively in response to the movement of the slide holder 36, it is sufficient to have the hydraulic cylinder 40 for moving the slide holder 36, and a hydraulic cylinder dedicated to the slide push-out plate 42 is not required. Therefore, in this embodiment, there is no need to provide a separate hydraulic pump or a distribution valve, and the system is not affected by hydraulic fluctuations such as a drop in hydraulic pressure.

[0057] 2(A) and 5(A) and (B), in the slide core moving step, the slide push plate 42 is released from the lock state with respect to the movable main die 28 via the cam mechanism 49. That is, the cam roller 52 is disposed in the inclined portion 50B of the cam groove 50, the other end 48B of the lock pin 48 is released from the engaged recess 28A1 of the movable main die 28, and the slide push plate 42 is allowed to move integrally with the slide core 20. Then, as shown in FIG. 2(B) and 6(A) and (B), the slide push pin 44 is retracted (moved) integrally with the slide core 20 from the movement trajectory of the molded product 12.

[0058] 2(C), in the movable mold releasing step, the movable ejection pin 34 moves relative to the movable main mold 28 and the movable nest 30, and protrudes from the surface of the movable nest 30. This makes it possible to release the molded article 12 from the movable nest 30, and the molded article 12 can be removed.

[0059] As described above, in this embodiment, the cam mechanism 49 can move the slide pusher plate 42 and the slide pusher pin 44 relative to the slide core 20, or can move the slide pusher plate 42 and the slide pusher pin 44 integrally with the slide core 20, following the movement of the slide holder 36 (slide core 20). That is, in this embodiment, a dedicated hydraulic cylinder for moving the slide pusher plate 42 and the slide pusher pin 44 is not required. This makes it possible to reduce the number of parts in the die casting apparatus 10.

[0060] In this embodiment, the cam mechanism 49 includes a cam groove 50 and a lock pin 48. The cam groove 50 is provided on the slide core 20 side. The lock pin 48 is provided with a cam roller 52, which is inserted into the cam groove 50, and the lock pin 48 moves along the shape of the cam groove 50 via the cam roller 52.

[0061] The lock pin 48 is engaged with the engaging recess 42A provided on the slide push plate 42 side and is also capable of engaging with the engaged recess 28A1 provided on the movable die 18 side, and when the lock pin 48 is engaged with the engaged recess 28A1, the slide push plate 42 is fixed to the movable die 18 side via the lock pin 48. When the slide core 20 slides in this state, the slide push plate 42 is capable of moving relative to the slide core 20. This makes it possible to release the molded product 12 from the slide core 20.

[0062] In this way, with a simple configuration, it is possible to move the slide push plate 42 relative to the slide core 20 or move the slide push plate 42 integrally with the slide core 20 in response to the movement of the slide core 20, thereby making it possible to achieve low cost in this embodiment.

[0063] In this embodiment, the cam mechanism 49 is used so that the slide push-out plate 42 and the slide push-out pin 44 can move relative to the slide core 20 in response to the movement of the slide core 20, or the slide push-out plate 42 can move integrally with the slide core 20, but as long as such an action can be obtained, the present invention is not limited to the cam mechanism 49. For example, the movement path of the lock pin 48 may be changed by changing the shape of the cam groove 50, etc.

[0064] Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment may be appropriately combined with various modified examples, and the present invention may of course be embodied in various forms without departing from the gist of the present invention.

[0065] <Additional Notes> The vehicle underbody structure according to the present invention may be formed by appropriately combining the following configurations.

[0066] (Configuration 1) The die-casting device comprises a fixed mold constituting a part of the mold, a movable mold constituting another part of the mold, which is arranged to be movable toward and away from the fixed mold, a cavity being formed between the fixed mold and the movable mold when in contact with the fixed mold, and which is capable of molding a molded product within the cavity, a slide core which is arranged on the movable mold side and is movable along a direction intersecting the moving direction of the movable mold and which molds the molded product together with the fixed mold and the movable mold, and a cam mechanism which moves an extrusion member which releases the molded product from the slide core relative to the slide core in response to the movement of the slide core, or which moves the extrusion member integrally with the slide core.

[0067] (Configuration 2) The cam mechanism includes a cam groove provided on the slide core side, and a lock pin that is movable via a tracing portion inserted into the cam groove, engages with the extrusion member and is engageable with an engaged portion provided on the movable mold side, and when engaged with the engaged portion allows the extrusion member to move relative to the slide core, and when the engagement with the engaged portion is released, allows the extrusion member to move integrally with the slide core.

[0068] (Configuration 3) A molding method using a die-casting device, the molding method including: a mold clamping process in which the movable mold is brought into contact with the fixed mold; a molding process in which molten material is filled into the hollow portion and cooled to form a molded product; a mold opening process in which the movable mold and the sliding core move in a direction away from the fixed mold; a slide core releasing process in which the extrusion member is made movable relative to the slide core via the cam mechanism, and the slide core is moved relative to the movable mold to release the molded product from the slide core; a slide core moving process in which the extrusion member moves integrally with the slide core via the cam mechanism in a direction away from the molded product; and a movable mold releasing process in which the molded product is released from the movable mold.

[0069] (Configuration 4) In the slide core release process, the push-out member is locked to the movable mold side via the cam mechanism, and in the slide core movement process, the state in which the push-out member is locked to the movable mold side via the cam mechanism is released. [Explanation of symbols]

[0070] 10 Die casting equipment 12 Molded products 14 Mold 16 Fixed type 18 Movable type 20 Slide Core 22 Cavity 28A1 Engaged recess (engaged part) 36 Slide holder (slide core) 42 Slide extrusion plate (extrusion member) 44 Slide ejection pin (ejection member) 48 Lock pin (cam mechanism) 49 Cam mechanism 50 Cam groove (cam mechanism) 52 Cam roller (trace part, cam mechanism)

Claims

1. A fixed mold constituting a part of the mold; a movable die that constitutes another part of the mold, the movable die being provided so as to be movable toward and away from the fixed die, the movable die being in contact with the fixed die and forming a cavity between the movable die and the fixed die, the movable die being capable of molding a molded product in the cavity; a slide core provided on the movable die and movable in a direction intersecting a moving direction of the movable die, for molding the molded product together with the fixed die and the movable die; a cam mechanism that moves an extrusion member, which releases the molded product from the slide core, relative to the slide core in response to the movement of the slide core, or moves the extrusion member integrally with the slide core; The die casting device comprises:

2. The cam mechanism includes: A cam groove provided on the slide core side; a lock pin which is movable via a tracing portion inserted into the cam groove, which is engaged with the push-out member and is engageable with an engaged portion provided on the movable die side, which allows the push-out member to move relatively to the slide core when engaged with the engaged portion, and allows the push-out member to move integrally with the slide core when the engaged state with the engaged portion is released; The die casting apparatus according to claim 1 , further comprising:

3. A molding method using the die-casting apparatus according to claim 1, a mold clamping process in which the movable mold is abutted against the fixed mold; a molding step in which a molten material is filled into the cavity and cooled to form a molded product; a mold opening process in which the movable mold and the slide core are moved in a direction away from the fixed mold; a slide core releasing step in which the push-out member is made movable relative to the slide core via the cam mechanism, and the slide core is moved relative to the movable die to release the molded product from the slide core; a slide core moving step in which the push-out member moves integrally with the slide core via the cam mechanism in a direction away from the molded product; a movable mold releasing step of releasing the molded product from the movable mold; A molding method comprising the steps of:

4. In the slide core releasing step, the pushing member is locked to the movable die side via the cam mechanism, 4. The molding method according to claim 3, wherein in the slide core moving step, the pushing member is released from a locked state relative to the movable die via the cam mechanism.

Images