Die casting device and molding method

Abstract

The invention provides a die casting device and a molding method. Wherein, in accordance with the movement of the sliding core, the cam mechanism moves the sliding push-out plate and the sliding push-out pin relative to the sliding core. Alternatively, the cam mechanism moves the sliding push-out plate and the sliding push-out pin together with the sliding core. As a result, a dedicated hydraulic cylinder for moving the sliding push-out plate and the sliding push-out pin is not required. The number of parts can be reduced in a die casting device.

Description

Technical Field

[0001] The invention relates to a die-casting device and a molding method. Background Art

[0002] Japanese Patent Application Laid-Open No. 2012-200777 discloses a technique related to a die casting device. In this prior art, in the process of opening a metal mold, a movable mold is moved away from a fixed mold, and a molded product is pushed out by an ejection mechanism to be demolded.

[0003] However, in the above-mentioned prior art, in addition to the mechanism for moving the movable mold, a mechanism for pushing out the molded product is required, which increases the number of parts of the device. Summary of the invention

[0004] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a die casting device and a molding method that can reduce the number of parts.

[0005] The die-casting device involved in one embodiment of the present invention comprises: a fixed mold, which constitutes a part of the metal mold; a movable mold, which constitutes another part of the metal mold and is configured to be able to abut or separate relative to the fixed mold, and when abutting with the fixed mold, a cavity portion is formed between the fixed mold and the fixed mold, and a molded part can be molded in the cavity portion; a sliding core, which is arranged on the movable mold side and is configured to be able to move in a direction intersecting with the moving direction of the movable mold, and molds the molded part together with the fixed mold and the movable mold; a cam mechanism, which can follow the movement of the sliding core and cause an ejection component that demolds the molded part from the sliding core to move relative to the sliding core, or cause the ejection component to move integrally with the sliding core.

[0006] In the die-casting device involved in the above-mentioned embodiment of the present invention, a fixed mold, a movable mold, a sliding core and a cam mechanism are provided. At least a part of the metal mold is formed by the fixed mold and the movable mold. The movable mold is configured to be able to abut or separate relative to the fixed mold. When the movable mold abuts against the fixed mold, a cavity is formed between the fixed mold and the movable mold. In the cavity, the molded part is molded. The sliding core is arranged on the movable mold side and is configured to be able to move along a direction intersecting with the moving direction of the movable mold. Moreover, the sliding core molds the molded part 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 sliding core. In the cavity, the molded part is molded.

[0007] Here, the sliding core is configured to be movable in a direction intersecting with the moving direction of the movable mold. Following the movement of the sliding core, the cam mechanism can move the ejection member for demolding the molded product from the sliding core relative to the sliding core. Alternatively, the cam mechanism can move the ejection member and the sliding core in one piece.

[0008] Generally speaking, after the metal mold is opened to move the movable side relative to the fixed side, the molded part held on the movable mold and the sliding core side is demolded from the movable mold side after demolding from the sliding core side, thereby being taken out of the metal mold. In the present invention, a cam mechanism is used when demolding from the sliding core side. When the molded part is demolded from the sliding core by the cam mechanism, the molded part is pushed out by the push-out member.

[0009] For example, an ejection plate as an ejection component, which is provided on the side of the sliding core and has a plurality of ejection pins, can be moved along the moving direction of the sliding core. By moving the ejection plate and causing the top surfaces of the plurality of ejection pins to protrude from the surface of the sliding core, the molded part is demolded from the sliding core. In other words, the ejection component moves relative to the sliding core. On the other hand, when demolding the molded part from the movable mold side, it is necessary to retract the sliding core from the moving track of the molded part in advance. At this time, it is necessary to move integrally with the sliding core.

[0010] Here, generally speaking, when the ejection member is moved, a dedicated hydraulic cylinder is used. In contrast, in the present invention, the cam mechanism can follow the movement of the sliding core to move the ejection member relative to the sliding core or move the ejection member and the sliding core integrally. That is, in the present invention, a dedicated hydraulic cylinder for the ejection member is not required to move the ejection member. Therefore, the number of parts in the die casting device can be reduced.

[0011] In the die-casting device involved in the above-mentioned embodiment of the present invention, the following embodiment can also be adopted, that is, the cam mechanism includes: a cam groove, which is arranged on the sliding core side; a lock pin, which is configured to be movable via a tracking portion inserted into the cam groove, engaged with the ejection component and capable of engaging relative to the engaged portion arranged on the movable mold side, when engaged with the engaged portion, the ejection component can be moved relative to the sliding core, and when the engagement state with the engaged portion is released, the ejection component can be moved integrally with the sliding core.

[0012] In the die casting device of the above structure, the cam mechanism includes a cam groove and a lock pin. The cam groove is provided on the sliding core side. A tracking portion is provided on the lock pin. The tracking portion is inserted into the cam groove. The lock pin moves along the shape of the cam groove via the tracking portion.

[0013] The lock pin is configured to engage with the ejection member and to be engageable with respect to the engaged portion provided on the movable mold side. When the lock pin is engaged with the engaged portion provided on the movable mold side, the ejection member is fixed to the movable mold side via the lock pin. In this state, when the sliding core slides, the ejection member can move relative to the sliding core. That is, the molded product can be demolded from the sliding core.

[0014] On the other hand, when the locking pin is released from the engaged state with the engaged portion, the ejector member can move integrally with the slide core. Thus, before the molded part is demolded from the movable mold side, the ejector member can be integrally retracted (moved) from the moving track of the molded part with the slide core.

[0015] In this way, with a simple structure, the ejector member can be relatively moved with respect to the slide core in accordance with the movement of the slide core, or the ejector member and the slide core can be moved integrally. In the present invention, low-cost measures can be implemented.

[0016] Another embodiment of the present invention relates to a molding method, which is a molding method using the die-casting device involved in the above-mentioned embodiment, and includes: a clamping process, which causes the movable mold to abut against the fixed mold; a molding process, which forms a molded part by filling the cavity with molten material and cooling the molten material; a mold opening process, which causes the movable mold and the sliding core to move in a direction away from the fixed mold; a sliding core demolding process, which causes the ejection component to move relative to the sliding core via the cam mechanism, and causes the sliding core to move relative to the movable mold, so that the molded part is demolded from the sliding core; a sliding core moving process, which causes the ejection component and the sliding core to move integrally in a direction away from the molded part via the cam mechanism; and a movable mold demolding process, which demolds the molded part from the movable mold.

[0017] In the molding method involved in the above-mentioned aspect of the present invention, there are a clamping step, a molding step, a mold opening step, a sliding core demolding step, a sliding core moving step, and a movable mold demolding step. First, the movable mold is brought into contact with the fixed mold through the clamping step, and the metal mold is clamped. Then, through the molding step, the molten material is filled into the cavity formed by the fixed mold, the movable mold, and the sliding core, and the molten material is cooled, so that the molded part is formed. Through the mold opening step, the movable mold and the sliding core are moved in a direction away from the fixed mold. The metal mold is opened.

[0018] Next, the ejection member is moved relative to the sliding core via the cam mechanism through the sliding core demolding step. The sliding core is moved relative to the movable mold. The molded part is demolded from the sliding core. Then, the ejection member and the sliding core are moved in a direction away from the molded part via the cam mechanism through the sliding core moving step. Next, the molded part is demolded from the movable mold through the movable mold demolding step. In this way, the molded part can be removed.

[0019] In this way, in the present invention, the ejection part can follow the movement of the sliding core, and the cam mechanism can be used to make the ejection part move relative to the sliding core or move the ejection part and the sliding core as a whole. Therefore, in the present invention, it is sufficient to have a hydraulic cylinder for moving the sliding core. There is no need for a hydraulic cylinder dedicated to the ejection part for moving the ejection part. As a result, the number of parts in the die-casting device can be reduced. In addition, as the molded part, metals such as aluminum alloys and magnesium alloys can be listed, but in addition to metals, resins, FRP (fiber reinforced composite materials), etc. can also be used.

[0020] In the molding method involved in the above-mentioned embodiment of the present invention, the following embodiment can also be adopted, that is, in the sliding core demolding process, the ejection component is locked relative to the movable mold side via the cam mechanism, and in the sliding core moving process, the locked state of the ejection component relative to the movable mold side is released via the cam mechanism.

[0021] In the molding method of the above structure, in the demolding process of the sliding core, the ejection member is locked relative to the movable mold side via the cam mechanism. As a result, the ejection member can move relative to the sliding core. In addition, in the sliding core moving process, the state in which the ejection member is locked relative to the movable mold side is released via the cam mechanism. As a result, the ejection member can move integrally with the sliding core.

[0022] As described above, the die casting device and the molding method according to the present invention can reduce the number of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, wherein like symbols represent like elements, and wherein:

[0024] Figure 1A A cross-sectional view showing a clamping process and a molding process in a metal mold used in the die-casting device according to the present embodiment, as viewed from a side direction;

[0025] Figure 1BA cross-sectional view showing a mold opening process in a metal mold used in the die casting device according to the present embodiment, as viewed from a side direction;

[0026] Figure 1C A cross-sectional view showing a slide core demolding process in a metal mold used in the die casting device according to the present embodiment, as viewed from a side direction;

[0027] Figure 2A A cross-sectional view showing a sliding core moving step in a metal mold used in the die casting device according to the present embodiment, as viewed from a side direction;

[0028] Figure 2B A cross-sectional view showing a sliding core moving step in a metal mold used in the die casting device according to the present embodiment, as viewed from a side direction;

[0029] Figure 2C A cross-sectional view showing a movable mold demolding process in a metal mold used in the die casting device according to the present embodiment, as viewed from a side direction;

[0030] Figure 3A In the metal mold used in the die casting device involved in this embodiment, Figure 1A Cross-sectional view observed in the corresponding plane direction;

[0031] Figure 3B For the general Figure 3A An enlarged view of the main part of the main part;

[0032] Figure 4A In the metal mold used in the die casting device involved in this embodiment, Figure 1C Cross-sectional view observed in the corresponding plane direction;

[0033] Figure 4B For the general Figure 4A An enlarged view of the main part of the main part;

[0034] Figure 5A In the metal mold used in the die casting device involved in this embodiment, Figure 2A Cross-sectional view observed in the corresponding plane direction;

[0035] Figure 5B For the general Figure 5A An enlarged view of the main part of the main part;

[0036] Fig. 6A In the metal mold used in the die casting device involved in this embodiment, Figure 2B Cross-sectional view observed in the corresponding plane direction;

[0037] Figure 6B For the general Fig. 6A An enlarged view of the main part of the image. DETAILED DESCRIPTION

[0038] Hereinafter, a die casting apparatus according to an embodiment of the present invention will be described with reference to the drawings.

[0039] Structure of die casting device

[0040] First, the structure of the die casting device according to the present embodiment will be described.

[0041] exist Figure 1A , a cross-sectional view of the die casting apparatus 10 according to the present embodiment as viewed from the side is shown. Figure 1A The die casting device 10 shown is a device for molding a molded product 12 made of a metal such as an aluminum alloy or a magnesium alloy. The die casting device 10 is provided with a metal mold 14 for molding the molded product 12.

[0042] Here, Figure 1A The metal mold 14 is shown in a locked state. The metal mold 14 includes a fixed mold 16 and a movable mold 18. A sliding core 20 is provided on the movable mold 18 side. The sliding core 20 is configured to be movable along a direction (arrow mark B direction) intersecting with the moving direction of the movable mold 18 (arrow mark A direction).

[0043] In this embodiment, when the metal mold 14 is clamped, the cavity 22 is formed by the fixed mold 16, the movable mold 18, and the sliding core 20. In addition, strictly speaking, the cavity 22 is formed by the fixed insert 26, the movable insert 30, and the sliding insert 38 described later. Then, the molded product 12 is formed by filling the cavity 22 with molten material and cooling it.

[0044] like Figure 1A As shown, the fixed mold 16 includes a fixed main mold 24 and a fixed insert 26. The fixed main mold 24 is arranged on the outside of the metal mold 14. The fixed insert 26 is arranged on the inside of the fixed main mold 24. In addition, the movable mold 18 includes a movable main mold 28 and a movable insert 30. The movable main mold 28 is arranged on the outside of the metal mold 14. The movable insert 30 is arranged on the inside of the movable main mold 28.

[0045] The movable mold 18 is configured to be able to abut or separate (move) relative to the fixed mold 16 in the direction of arrow mark A. In addition, a movable ejector plate 32 is provided on the movable mold 18 side. The movable ejector plate 32 is provided on the outer side of the movable mold 18. A plurality of movable ejector pins 34 are provided on the movable ejector plate 32. These movable ejector pins 34 are configured to penetrate the movable main mold 28 and the movable insert 30 and be able to abut against the surface of the molded product 12.

[0046] In addition, the movable ejector plate 32 and the movable ejector pin 34 are provided so as to be movable relative to the movable main mold 28 and the movable nesting block 30. The movable ejector pin 34 pushes the surface of the molded product 12 and protrudes from the surface of the movable nesting block 30, so that the molded product 12 can be demolded from the movable nesting block 30.

[0047] On the other hand, the sliding core 20 includes a sliding die holder 36 and a sliding insert 38. The sliding die holder 36 is provided on the outside of the metal mold 14. The sliding insert 38 is provided at the top end of the sliding die holder 36. The sliding die holder 36 is provided so as to be movable relative to the movable mold 18. On the outside of the sliding die holder 36, an overhanging portion 28A is provided in a state where a part of the movable main mold 28 is overhanging. The sliding die holder 36 is in a state where the outer side is surrounded by the overhanging portion 28A.

[0048] In addition, a slide ejection plate 42 (described later) is provided on the slide core 20 side. A plurality of slide ejection pins 44 are provided on the slide ejection plate 42. These slide ejection pins 44 are provided so as to penetrate the slide die holder 36 and the slide insert 38 and to be able to abut against the surface of the molded part 12.

[0049] In addition, the slide ejection plate 42 and the slide ejection pin 44 are configured to be movable relative to the slide die holder 36 and the slide insert 38. The slide ejection pin 44 pushes the surface of the molded product 12 and protrudes from the surface of the slide insert 38, so that the molded product 12 can be demolded from the slide insert 38.

[0050] Here, in Figure 3A In the figure, the Figure 1A The cross-sectional view observed in the corresponding plane direction. Figure 3B In the figure, it is shown that Figure 3A The main part of the enlarged picture of the main part. Figure 3A as well as Figure 3BAs shown, in this embodiment, the sliding die holder 36 (sliding core 20) is configured to be movable relative to the movable die 18 via, for example, a hydraulic cylinder 40. A storage portion 46 is provided in the sliding die holder 36. The sliding push plate 42 is configured to be able to be stored in the storage portion 46. The sliding push plate 42 is configured to be able to move in the direction of the arrow mark B in the storage portion 46.

[0051] like Figure 1A , Figure 3A , Figure 3B As shown, an engaging recess 42A is formed in the middle of the vertical direction of the slide push plate 42 and at both ends of the length direction of the slide push plate 42. In addition, here, the length direction of the slide push plate 42 is described as a horizontal direction, but the length direction of the slide push plate 42 can also be a vertical direction.

[0052] In addition, in the engagement recess 42A, for example, one end 48A of a cylindrical lock pin 48 in the longitudinal direction is engaged. The lock pin 48 passes through the slide die holder 36. An engaged recess (engaged portion) 28A1 is formed on the overhanging portion 28A of the movable main die 28 provided outside the slide die holder 36. The other end 48B of the lock pin 48 in the longitudinal direction is engaged with the engaged recess 28A1.

[0053] In addition, the shape of the lock pin 48 is not limited to a cylindrical shape, and may be a prism shape. When the lock pin 48 is a prism shape, the contact area can be increased compared to a cylindrical shape. Therefore, it is also possible to change the cross-sectional shape in the engagement portion of the lock pin 48.

[0054] On the other hand, a cam groove 50 constituting a part of the cam mechanism 49 is formed on the slide mold holder 36 at a position opposite to the engaging recessed portion 42A formed on the slide push plate 42. The cam groove 50 includes a parallel portion 50A and an inclined portion 50B. The parallel portion 50A is formed 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 relative to the parallel portion 50A, and is inclined toward a direction away from the overhanging portion 28A of the movable main mold 28 (the slide push plate 42 side) as it moves away from the parallel portion 50A.

[0055] The cam roller (tracking portion) 52 provided on the lock pin 48 and constituting another part of the cam mechanism 49 is inserted into the cam groove 50 and is movable along the shape of the cam groove 50. The lock pin 48 is movable in the slide die holder 36 via the cam roller 52.

[0056] like Figure 3A as well as Figure 3BAs shown in the figure, when the cam roller 52 is arranged in the parallel portion 50A of the cam groove 50, one end 48A of the lock pin 48 is engaged with the engagement recess 42A of the slide push plate 42. The other end 48B of the lock pin 48 is engaged with the engaged recess 28A1 formed on the overhanging portion 28A of the movable main mold 28 (locked state). As a result, the movement of the slide push plate 42 is restricted.

[0057] In this state, if Figure 4A , Figure 4B As shown in the figure, when the slide die holder 36 (slide core 20) moves (retreats), the slide ejector plate 42 is restricted from moving and thus moves relative to the slide die holder 36. In addition, the cam roller 52 moves along the cam groove 50 by the movement of the slide die holder 36. In addition, in this state, a gap is provided between the one end portion 48A of the lock pin 48 and the engaging recess 42A of the slide ejector plate 42.

[0058] On the other hand, Figure 5A , Figure 5B As shown in the figure, when the cam roller 52 is arranged at the inclined portion 50B of the cam groove 50, the cam roller 52 moves toward the storage portion 46 as the slide die holder 36 retreats. Therefore, via the cam roller 52, the end portion 48A of the lock pin 48 moves further to the depth of the engagement recess 42A of the slide push plate 42.

[0059] As a result, the other end portion 48B of the lock pin 48 is released from the engagement state with the engaged recessed portion 28A1 of the movable main mold 28 (lock release state). Fig. 6A , Figure 6B As shown, the slide ejection plate 42 is movable integrally with the slide mold holder 36 (slide core 20 ).

[0060] Functions and effects of die casting equipment

[0061] Next, the operation and effects of the die casting device according to the present embodiment will be described.

[0062] like Figure 1A , Figure 3A , Figure 3B As shown, the die casting device 10 according to the present embodiment includes a fixed mold 16, a movable mold 18, a sliding core 20, and a cam mechanism 49. In the present embodiment, the sliding core 20 is provided on the movable mold 18 side. The fixed mold 16, the movable mold 18, and the sliding core 20 form a cavity 22. In the cavity 22, the molded product 12 is molded.

[0063] The slide core 20 is configured to be movable in a direction (arrow B direction) intersecting the moving direction of the movable mold 18. Following the movement of the slide core 20, the cam mechanism 49 can move the slide ejection plate 42 and the slide ejection pin 44 that eject the molded product 12 from the slide core 20 side relative to the slide core 20. Alternatively, the cam mechanism 49 can move the slide ejection plate 42 and the slide core 20 integrally.

[0064] Here, a molding method using the die casting device 10 according to the present embodiment will be described.

[0065] The molding method according to the present embodiment includes a mold clamping step, a molding step, a mold opening step, a slide core demolding step, a slide core moving step, and a movable mold demolding step. Figure 1A , Figure 3A , Figure 3B In FIG. 1 , the clamping process and the molding process of the metal mold 14 are shown. Figure 1B In FIG. 1 , the mold opening process of the metal mold 14 is shown. Figure 1C as well as Figure 4A , Figure 4B In FIG. 1 , the sliding core demoulding process is shown. Figure 2A as well as Figure 5A , Figure 5B , Figure 2B as well as Fig. 6A , Figure 6B In the figure, the sliding core moving process is shown respectively. Figure 2C , a movable mold demolding process is shown.

[0066] like Figure 1A , Figure 3A , Figure 3B As shown, in the clamping process of the metal mold 14, the movable mold 18 abuts against the fixed mold 16. In this embodiment, the cavity 22 is formed by the fixed insert 26 provided on the fixed mold 16, the movable insert 30 provided on the movable mold 18, and the sliding insert 38 provided on the sliding core 20. In addition, in the molding process, the molded product 12 is molded by filling the cavity 22 with molten material and cooling it.

[0067] Here, the slide push plate 42 is locked relative to the movable main mold 28 via the cam mechanism 49. That is, the cam roller 52 is arranged in the parallel portion 50A of the cam groove 50. The other end 48B of the lock pin 48 is engaged with the engaged recessed portion 28A1 of the movable main mold 28. The movement of the slide push plate 42 is restricted.

[0068] Next, if Figure 1BAs shown, in the mold opening process of the metal mold 14, the movable mold 18 and the slide core 20 are moved together in a direction away from the fixed mold 16. At this time, the molded product 12 is demolded with respect to the fixed insert 26.

[0069] Moreover, if Figure 1C as well as Figure 4A , Figure 4B As shown in FIG. 1 , in the process of demolding the sliding core, the sliding mold holder 36 retreats. Here, as described above, the sliding ejector plate 42 is locked relative to the movable main mold 28 via the cam mechanism 49. Therefore, when the sliding mold holder 36 retreats, the sliding ejector plate 42 moves relative to the sliding mold holder 36 (sliding core 20). Therefore, when the sliding mold holder 36 moves, the sliding ejector pin 44 protrudes from the surface of the sliding insert 38. As a result, the molded product 12 can be demolded from the sliding insert 38.

[0070] Thus, in this embodiment, the slide ejection plate 42 moves relative to the slide die holder 36, so that the ejection action by the slide ejection pin 44 can be performed in a state completely synchronized with the retreat amount of the slide die holder 36. Thus, the molded product 12 can be gradually demolded from the slide insert 38 by the slide ejection pin 44 while the molded product 12 is held by the slide insert 38. The deformation of the molded product 12 can be suppressed.

[0071] In addition, as a comparative example, although not shown in the figure, when the sliding die holder is retreated by a hydraulic cylinder and the sliding ejection plate is pushed forward by another hydraulic cylinder, when oil is supplied to multiple cylinders from one oil system (pump), the cylinder with less resistance will move first. Therefore, when the movement of the cylinder dedicated to the sliding ejection plate is delayed due to the retreat of the sliding die holder, the sliding ejection pin will no longer function. Therefore, in the comparative example, it is necessary to set a distribution valve by separating the hydraulic pumps.

[0072] In contrast, in the present embodiment, the slide ejector pin 44 can be relatively moved following the movement of the slide die holder 36. It is sufficient to have a hydraulic cylinder 40 for moving the slide die holder 36, and there is no need for a hydraulic cylinder for the slide ejector plate 42. Therefore, in the present embodiment, there is no need to separate a hydraulic pump or to provide a distribution valve. The present embodiment is also not affected by hydraulic pressure fluctuations such as hydraulic pressure reduction.

[0073] Next, if Figure 2A as well as Figure 5A , Figure 5BAs shown, in the sliding core moving process, the sliding ejection plate 42 is released from the locked state relative to the movable main mold 28 via the cam mechanism 49. That is, the cam roller 52 is arranged at the inclined portion 50B of the cam groove 50. The other end portion 48B of the lock pin 48 is released from the engaged state with the engaged recessed portion 28A1 of the movable main mold 28. The sliding ejection plate 42 can move integrally with the sliding core 20. Moreover, as shown in FIG. Figure 2B as well as Fig. 6A , Figure 6B As shown, the slide ejector pin 44 is retracted (moved) from the moving trajectory of the molded article 12 integrally with the slide core 20 .

[0074] Next, if Figure 2C As shown, in the movable mold demolding step, the movable ejector 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. Thus, the molded product 12 can be demolded from the movable nest 30. The molded product 12 can be removed.

[0075] As described above, in the present embodiment, the cam mechanism 49 can move the slide ejection plate 42 and the slide ejection pin 44 relative to the slide core 20 following the movement of the slide die holder 36 (slide core 20). Alternatively, the cam mechanism 49 can move the slide ejection plate 42 and the slide ejection pin 44 integrally with the slide core 20. That is, in the present embodiment, a dedicated hydraulic cylinder for moving the slide ejection plate 42 and the slide ejection pin 44 is not required. Therefore, the number of parts in the die casting device 10 can be reduced.

[0076] In addition, 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. A cam roller 52 is provided on the lock pin 48. The cam roller 52 is inserted into the cam groove 50. The lock pin 48 moves along the shape of the cam groove 50 via the cam roller 52.

[0077] The lock pin 48 is configured to be engaged with the engagement recess 42A provided on the slide ejection plate 42 side, and is configured to be engaged with the engaged recess 28A1 provided on the movable mold 18 side. When the lock pin 48 is engaged with the engaged recess 28A1, the slide ejection plate 42 is fixed to the movable mold 18 side via the lock pin 48. In this state, when the slide core 20 slides, the slide ejection plate 42 can move relative to the slide core 20. As a result, the molded product 12 can be demolded from the slide core 20.

[0078] Thus, with a simple structure, the slide push plate 42 can be relatively moved with respect to the slide core 20 following the movement of the slide core 20, or the slide push plate 42 can be moved integrally with the slide core 20. In this embodiment, low-cost measures can be taken.

[0079] In addition, in the present embodiment, the cam mechanism 49 is used so that the slide ejection plate 42 and the slide ejection pin 44 can be relatively moved relative to the slide core 20 in accordance with the movement of the slide core 20, or the slide ejection plate 42 can be moved integrally with the slide core 20. 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.

[0080] An embodiment of the present invention has been described above, but the present invention is not limited to such an embodiment. An embodiment and various modified examples may be appropriately combined for use. The present invention may be implemented in various ways without departing from the scope of the present invention.

[0081] Notes

[0082] Furthermore, the following structures may be appropriately combined to form the vehicle lower structure according to the present invention.

[0083] Structure 1

[0084] A die-casting device, comprising:

[0085] a fixed die, which forms part of the metal die;

[0086] a movable mold, which constitutes another part of the metal mold and is arranged to be able to abut against or separate from the fixed mold, and in a state of abutting against the fixed mold, a cavity is formed between the movable mold and the fixed mold, and a molded product can be molded in the cavity;

[0087] a sliding core provided on the movable mold side and configured to be movable in a direction intersecting with a moving direction of the movable mold, and to mold the molded article together with the fixed mold and the movable mold;

[0088] The cam mechanism can follow the movement of the slide core to relatively move an ejection member for demolding the molded product from the slide core with respect to the slide core, or can move the ejection member and the slide core integrally.

[0089] Structure 2

[0090] The cam mechanism is constructed to include:

[0091] A cam groove, which is provided on the sliding core side;

[0092] A locking pin is configured to be movable via a tracking portion inserted into the cam groove, engage with the ejection component and engage relative to an engaged portion provided on the movable mold side, and when engaged with the engaged portion, the ejection component can be moved relative to the sliding core, and when the engagement state with the engaged portion is released, the ejection component can be moved integrally with the sliding core.

[0093] Structure 3

[0094] A molding method using a die-casting device, comprising:

[0095] A mold clamping step of causing the movable mold to abut against the fixed mold;

[0096] a molding step of molding a molded article by filling the cavity with a molten material and cooling the molten material;

[0097] A mold opening step, which moves the movable mold and the sliding core in a direction away from the fixed mold;

[0098] a slide core demolding step of moving the ejection member relative to the slide core via the cam mechanism, and moving the slide core relative to the movable mold to demold the molded product from the slide core;

[0099] a sliding core moving step, in which the ejection member and the sliding core are moved integrally in a direction away from the molded part via the cam mechanism;

[0100] The movable mold demolding step is to demold the molded product from the movable mold.

[0101] Structure 4

[0102] In the slide core demolding step, the ejection member is locked relative to the movable mold side via the cam mechanism.

[0103] In the slide core moving step, the state in which the ejector member is locked with respect to the movable mold side is released via the cam mechanism.

Claims

1. A die casting device comprising: a fixed die, which forms part of the metal die; a movable mold, which constitutes another part of the metal mold and is arranged to be able to abut against or separate from the fixed mold, and in a state of abutting against the fixed mold, a cavity is formed between the movable mold and the fixed mold, and a molded product can be molded in the cavity; a sliding core provided on the movable mold side and configured to be movable in a direction intersecting with a moving direction of the movable mold, and to mold the molded article together with the fixed mold and the movable mold; The cam mechanism can follow the movement of the slide core to relatively move an ejection member for demolding the molded product from the slide core with respect to the slide core, or can move the ejection member and the slide core integrally.

2. The die casting device according to claim 1, wherein: The cam mechanism comprises: A cam groove, which is provided on the sliding core side; A locking pin is configured to be movable via a tracking portion inserted into the cam groove, engage with the ejection component and engage relative to an engaged portion provided on the movable mold side, and when engaged with the engaged portion, the ejection component can be moved relative to the sliding core, and when the engagement state with the engaged portion is released, the ejection component can be moved integrally with the sliding core.

3. A molding method, which uses the die-casting device according to claim 1, and comprises: A mold clamping step of causing the movable mold to abut against the fixed mold; a molding step of molding a molded article by filling the cavity with a molten material and cooling the molten material; A mold opening step, which moves the movable mold and the sliding core in a direction away from the fixed mold; a slide core demolding step of moving the ejection member relative to the slide core via the cam mechanism and moving the slide core relative to the movable mold to demold the molded product from the slide core; a sliding core moving step, in which the ejection member and the sliding core are moved integrally in a direction away from the molded part via the cam mechanism; The movable mold demolding step is to demold the molded product from the movable mold.

4. The molding method according to claim 3, wherein: In the slide core demolding step, the ejection member is locked relative to the movable mold side via the cam mechanism. In the slide core moving step, the state in which the ejector member is locked with respect to the movable mold side is released via the cam mechanism.

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