Mold Equipment

Abstract

To provide a mold device in which the flexibility in a movement direction of a slide mold is high.SOLUTION: A mold device M1 comprises: a fixed mold; a movable mold 9; a slide mold 1b held by a slide holder 2b slidably provided at the movable mold 9; a slide block 80 slidably provided at the movable mold 9; an actuator moving the slide holder 2b via the slide block 80 by the advance and retreat of a driving rod 62 provided with a connection member 72 capable of engaging with a slot 4 formed at the slide block 80 along a direction almost orthogonal to a mold opening / closing direction; and a cam mechanism for changing the movement direction of the slide holder 2b movable in a plane almost orthogonal to the mold opening / closing direction to a direction different from the advance / retreat direction of the driving rod 62. The cam mechanism comprises: a cam groove 91 provided at the slide holder 2b; and a cam pin 93 provided at the slide block 80 and moving inside the cam groove 91 while being engaged with the cam groove 91.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a die apparatus. [Background technology]

[0002] A molding machine for molding a casting, such as a die-casting machine, has a die device that forms a cavity corresponding to the shape of the casting. For example, the die device is configured to include a fixed die and a movable die that is driven in a die opening / closing direction to approach and move away from the fixed die. When die-casting is performed using such a molding machine, for example, a casting molded into a desired shape can be obtained by solidifying molten metal as a molding material injected into the cavity. Some die devices used for casting have, in addition to a fixed die and a movable die, a slide die that can move in a direction different from the die opening / closing direction of the movable die relative to the fixed die in order to mold an undercut portion of the casting.

[0003] Patent document 1 discloses a casting mold apparatus including a fixed mold, a movable mold, a sliding mold that can move in a direction intersecting the direction of movement of the movable mold, a driving means (cylinder) that moves the sliding mold in that direction, and a cam mechanism (first cam and cam groove) that moves the sliding mold away from the casting product as the movable mold opens. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-68090 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the technology described in Patent Document 1 has a low degree of freedom in designing the direction in which the slide die moves, and therefore cannot accommodate cases in which the slide die is required to move in various directions according to the product shape. If there is a problem with the withdrawal of the slide die, there is a problem that excess material increases or blowholes occur in the casting, resulting in a decrease in casting quality.

[0006] The present invention has been made to solve such problems, and has an object to provide a mold apparatus which has a high degree of freedom in the direction of movement of a slide mold. [Means for solving the problem]

[0007] A mold device in one embodiment has a fixed mold, a movable mold that can move in the mold opening and closing direction approaching and moving away from the fixed mold, a slide mold held in a slide holder slidably attached to the movable mold, a slide block slidably attached to the movable mold, an actuator that moves the slide holder via the slide block by moving a drive rod having a connecting member that can engage with a slot formed in the slide block back and forth along a direction approximately perpendicular to the mold opening and closing direction, and a cam mechanism for changing the movement direction of the slide holder, which can move within a plane approximately perpendicular to the mold opening and closing direction, to a direction different from the forward and backward movement direction of the drive rod, and the cam mechanism has a cam groove provided in the slide holder, and a cam pin provided in the slide block that moves within the cam groove while engaging with the cam groove. Effect of the Invention

[0008] According to the present invention, a mold device having a high degree of freedom in the direction of movement of a slide mold can be provided. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a first diagram showing a main part of the die device according to the first embodiment. [Diagram 2] FIG. 2 is a second diagram showing a main part of the die device according to the first embodiment. [Diagram 3]5A to 5C are schematic diagrams illustrating the operation of a slide included in the mold device according to the first embodiment. [Figure 4] FIG. 4 is a cross-sectional view of FIG. [Diagram 5] FIG. 11 is a front view showing the movable platen side (including the second platen) of a molding machine including a mold device of a comparative example. [Figure 6] FIG. 13 is a front view showing a movable mold included in a mold device of a comparative example. [Figure 7] 13 is a perspective view illustrating a connection structure between an actuator and a slide holder in a mold device of a comparative example. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] First embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The components shown in the drawings are only a part of the whole, and many other components that are not shown are actually included. Furthermore, in the following description, the same or equivalent elements are given the same reference numerals, and duplicated descriptions are omitted.

[0011] In the following description, the present invention will be described in detail as a die-casting die apparatus constituting a part of a die-casting machine as a molding machine that molds a casting by pouring molten metal as a molding material into a cavity formed by the die apparatus and then cooling and solidifying the molten metal. However, the present invention is not limited to this embodiment, and can be applied to die apparatuses for die-casting to mold other castings, or various die apparatuses for various castings such as low-pressure casting and gravity casting, injection molding, blow molding, etc.

[0012] First, a comparative mold apparatus M2 will be described as an example of a mold apparatus having a low degree of freedom in the moving direction of a slide mold. The configuration of the comparative mold apparatus M2 will be described with reference to Figs. 5 to 7. Fig. 5 is a front view showing the movable platen side (including the second platen) of a molding machine including the comparative mold apparatus. Fig. 6 is a front view showing a movable mold included in the comparative mold apparatus. Fig. 7 is a perspective view explaining the connection structure between the actuator and the slide holder in the comparative mold apparatus.

[0013] As shown in Figs. 5 to 7, the mold apparatus M2 of the comparative example mainly has a fixed mold attached to a fixed platen of the molding machine, a movable mold 9 attached to a movable platen 5 of the molding machine, and a slide 10a. The fixed platen and the movable platen 5 are disposed opposite each other. The fixed mold and the movable mold 9 are attached to the opposing surfaces of the fixed platen and the movable platen 5, respectively. The movable mold 9 is movable in a mold opening / closing direction approaching and moving away from the fixed mold. The mold opening / closing direction is, for example, a horizontal direction, which is the front-rear direction in Figs. 5 and 6.

[0014] In a molding machine having a mold assembly M2, a plurality of tie bars 7 are provided between a fixed platen and a support platen, and a movable platen 5 arranged between the fixed platen and the support platen is slidably inserted through the tie bars 7. The movable platen 5 moves a movable mold 9 in the mold opening / closing direction relative to the fixed mold, and is supported by the support platen via a mold opening / closing means for clamping the mold. The fixed platen is also provided with an injection means for injecting molten metal through a molding material introduction portion for supplying the molten metal to the cavity. The movable mold 9 is equipped with an ejection mechanism for ejecting the cast product so that it can be removed.

[0015] A slide 10a is disposed between the fixed mold and the movable mold 9. When the extension direction (the forward and backward direction of the drive rod 62 of the cylinder 61) of the actuator (the axial direction of the drive rod 62 of the cylinder 61) is defined as a first direction among directions substantially perpendicular to the mold opening and closing direction of the movable mold 9 relative to the fixed mold, the mold device M2 of the comparative example has a structure for moving the slide mold 1a in the first direction.

[0016] The fixed mold, the movable mold 9, and the slide 10a each have a dedicated part, a general-purpose part, and an attachment / detachment mechanism that automatically detaches each dedicated part from each general-purpose part. The dedicated part is a part that is replaced when changing the stage, and the general-purpose part is a part that is not replaced when changing the stage.

[0017] These dedicated parts are automatically detachably attached to the corresponding general-purpose parts by their respective dedicated attachment / detachment mechanisms, and the dedicated parts are automatically integrated with each other by an integration mechanism. The die assembly M2 thus configured is configured so that the dedicated parts can be changed as a single assembly while the general-purpose parts are left in the machine.

[0018] The following description will focus on the configuration of the movable side to which the slide 10a is attached. Fig. 5 shows the components of the dedicated section. As shown in Fig. 5, the movable platen 5 has a movable second platen 8 on the front surface facing the movable mold 9. Furthermore, on the surface of the movable second platen 8 having a substantially rectangular shape facing the movable mold 9, a cylinder mounting section 23 for mounting an actuator (cylinder 61) described later is fixedly provided at approximately the center of each side. Each cylinder mounting section 23 has a rod recess 24 for accommodating a drive rod 62 of the cylinder 61 described later formed so as to extend in the first direction.

[0019] Also, components of the general-purpose section are shown in Fig. 6. As shown in Fig. 6, the movable mold 9 mainly includes a movable insert 30 which forms the molding surface 33 of the cavity, and a movable main mold 31 which is attached to the movable second platen 8. The movable insert 30 is formed in a substantially rectangular shape, and a convex molding section 32 is provided at the substantially center of the surface facing the fixed mold. The surface of the movable insert 30 facing the fixed mold has four recesses 34 which slidably hold the four slide dies 1a, and are formed in a substantially cross shape from the center toward each side.

[0020] The movable insert 30 is attached in a positioned state to approximately the center of the movable main mold 31. Also, a pair of support parts 40 is formed in the movable main mold 31 corresponding to each slide 10a. Between the support parts 40, the slide holder 2a of the slide 10a is disposed.

[0021] The slide 10a includes a slide mold 1a that forms the molding surface 33 of the cavity, a slide holder 2a that holds the slide mold 1a, a slide key 41 for sliding the slide holder 2a, an actuator for driving the slide mold 1a to open and close, and a connecting means for connecting the slide holder 2a to the actuator. A plurality of sets (for example, four sets) of the slide mold 1a, the slide holder 2a, and the slide keys 41 are radially arranged around the movable main mold 31 as a dedicated part. Also, four actuators are radially arranged around the movable second platen 8 as a general-purpose part so as to correspond to the slide mold 1a, the slide holder 2a, and the slide keys 41.

[0022] The slide dies 1a are slidably inserted into the recesses 34 of the movable insert 30. The slide dies 1a are positioned and held by the slide holder 2a, so that they can be smoothly inserted into the recesses 34 of the movable insert 30.

[0023] The slide holder 2a is guided to slide in a first direction along a slide key 41 protruding from the front surface of the movable main mold 31, with the back surface in sliding contact with the front surface of the movable main mold 31. When the actuator is driven with the movable mold 9 (movable main mold 31) attached to the movable second platen 8, the slide dies 1a held by each slide holder 2a advance from the standby position toward the cavity, and the slide dies 1a collide with each other, forming a cavity around the molding portion 32 of the movable insert 30. The slide holder 2a also has a connected member 3 protruding from the end opposite to the side where the slide die 1a is attached.

[0024] A pair of slide keys 41 are provided on the opposing sides of the pair of support parts 40 so as to be parallel to a first direction which is the movement direction of the slide holder 2a, and both ends of the slide holder 2a are slidably engaged with the slide keys 41.

[0025] Returning to Fig. 5, the actuator is a hydraulic cylinder 61 that drives a connecting member 72 of the connecting means to advance and retreat. The actuator is fixed to the periphery of the movable second platen 8 (for example, the outer end surface of the cylinder mounting portion 23) with a driving rod 62 of the cylinder 61 inserted into a rod recess 24 of a cylinder mounting portion 23 provided on the movable second platen 8. In this embodiment, the driving rod 62 is driven to extend and retract in any of four orthogonal directions, namely the vertical direction along the first direction and the horizontal direction.

[0026] The actuator is attached to the cylinder attachment portion 23 of the fixed main mold 21. Since the actuator is mounted on the movable second platen 8 as a general-purpose portion, it does not need to be replaced when changing stages. Therefore, costs can be reduced compared to when the actuator is attached to the dedicated portion.

[0027] The connecting means includes a T-shaped slot 4 consisting of a vertical slot extending in a direction perpendicular to the first direction and a horizontal slot extending in the first direction, and a connecting member 72 having a T-shaped head portion 73 at its tip that can engage with the slot 4. The connecting member 72 is a cylindrical member overall, and has an H-shaped cross section in the direction of its central axis, and is disposed so that the central axis direction is parallel to the first direction.

[0028] The slot 4 is formed at the base end of the connected member 3 on the opposite side to the cavity. The slot 4 is recessed from the end face of the connected member 3 on the movable platen 5 side toward the fixed mold side so that its cross section is semicircular. The rear end of the connecting member 72 is connected to the tip of the driving rod 62 of the cylinder 61. The connecting member 72 is provided so that its tip protrudes toward the slide holder 2a side. As shown in FIG. 7, by inserting the head portion 73 into the slot 4, the slide holder 2a is connected to the driving rod 62 of the cylinder 61 via the connecting means.

[0029] In the mold apparatus M2 configured in this manner, when closing the mold for die-casting, the drive rod 62 of the cylinder 61 is extended, whereby the connecting member 72 presses the slide holder 2a inward toward the cavity via the connected member 3, causing the slide mold 1a held by the slide holder 2a to move forward along the first direction within the recess 34 of the movable side insert 30.

[0030] In addition, when the die casting is completed and the mold is opened, the drive rod 62 of the cylinder 61 is retracted, whereby the connecting member 72 presses the slide holder 2a outward away from the cavity via the connected member 3, and the slide die 1a held by the slide holder 2a moves backward along the first direction within the recess 34 of the movable side insert 30.

[0031] In this manner, in the mold device M2 of the comparative example, an actuator (cylinder 61) is provided that drives the slide holder 2a as a dedicated part in any of four orthogonal directions relative to the movable second platen 8 as a general-purpose part, thereby realizing the movement of the slide die 1a provided on the movable mold 9. Therefore, the dedicated part can have a simple and slim structure.

[0032] However, in the case of the mold device M2 of the comparative example described above, the movement direction of the sliding die 1a is limited to only the first direction in which the driving rod 62 of the cylinder 61 extends and retracts. In the configuration of the mold device M2 of the comparative example, the degree of freedom of the movement direction of the sliding die 1a is low, and therefore it is not possible to deal with cases where it is required to move the sliding die 1a in a direction other than the first direction depending on the product shape.

[0033] In contrast, the mold device M1 according to this embodiment has a cam mechanism for changing the moving direction of the slide die 1b to a second direction different from the first direction when the advancing and retreating direction of the driving rod 62 is the first direction. This increases the degree of freedom of the moving direction of the slide die 1b. In the following description, the second direction is assumed to be an acute angle θ with respect to the first direction (see FIG. 3).

[0034] The configuration of a mold apparatus M1 according to this embodiment will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a first view showing a main part of the mold apparatus according to embodiment 1. Fig. 2 is a second view showing the main part of the mold apparatus according to embodiment 1.

[0035] The mold apparatus M1 according to this embodiment has a common configuration with the mold apparatus M2 of the comparative example, except for the structure for moving the slide mold 1b. Therefore, only the main parts of the mold apparatus M1 are shown, and the same components are given the same reference numerals, and the differences from the mold apparatus M2 are mainly described. Figures 1 and 2 are front views of the movable main mold 31 in a state in which an actuator provided on the cylinder mounting portion 23 of the movable second platen 8 is connected, and show the vicinity of one of the four slides 10b. Also, Figure 1 shows a state in which the slide mold 1b is closed, and Figure 2 shows a state in which the slide mold 1b is opened.

[0036] The mold device M1 according to this embodiment includes a fixed mold, a movable mold 9 that can move in the mold opening / closing direction to approach and move away from the fixed mold, a slide mold 1b held by a slide holder 2b slidably provided on the movable mold 9, and a slide block 80 slidably provided on the movable mold 9. The mold device M1 also includes an actuator that moves the slide holder 2b via the slide block 80 by the drive rod 62 having a connecting member 72 that can engage with a slot 4 formed in the slide block 80 moving forward and backward along a direction substantially perpendicular to the mold opening / closing direction, and a cam mechanism for changing the moving direction of the slide holder 2b that can move within a plane substantially perpendicular to the mold opening / closing direction to a direction different from the advancing and retreating direction of the drive rod 62. The cam mechanism includes a cam groove 91 provided in the slide holder 2b, and a cam pin 93 provided in the slide block 80 and moving within the cam groove 91 while engaging with the cam groove 91.

[0037] The mold device M1 has a slide 10b instead of the slide 10a of the mold device M2 of the comparative example. The slide 10b of the mold device M1 includes a slide mold 1b as a dedicated part, a slide holder 2b, and a slide block 80. The slide 10b further includes a first slide key 141 for sliding the slide block 80, a second slide key 142 for sliding the slide holder 2b, an actuator, a connecting means, and a cam mechanism.

[0038] In the movable main die 31, a pair of support parts 140 are formed corresponding to each slide 10b so as to be capable of supporting a pair of first slide keys 141 and a pair of second slide keys 142. Between each of the support parts 140, the slide holder 2b of the slide 10b and the slide block 80 are disposed. On the opposing sides of the pair of support parts 140, a pair of first slide keys 141 are provided parallel to a first direction which is the moving direction of the slide block 80, and both ends of the slide block 80 are slidably engaged with the pair of first slide keys 141. On the opposite side to the opposing sides of the pair of support parts 140, a pair of second slide keys 142 are provided parallel to a second direction which is the moving direction of the slide holder 2b, and both ends of the slide holder 2b are slidably engaged with the pair of second slide keys 142.

[0039] The slide mold 1b forming the molding surface 33 of the cavity is slidably inserted into each of the recesses 134 formed in the movable insert 30. Here, the recesses 134 formed in the movable insert 30 serve to slidably hold the slide mold 1b, and are formed radially from the center toward each side so as to be parallel to the second direction.

[0040] The slide holder 2b that holds the slide die 1b has a bent shape so that both ends can engage with the second slide key 142. The slide holder 2b is provided with a pair of upper and lower cam grooves 91 that penetrate in the die opening and closing direction. The cam groove 91 is a groove that extends obliquely from the upper end close to the cavity toward the lower end so as to move away from the cavity in the vertical and horizontal directions. The cam groove 91 is formed at a position away from the end where the slide die 1b is attached. A pair of keys 92 is provided at both ends along the extension direction of the cam groove 91.

[0041] The slide block 80 is provided slidably between the slide holder 2b and the movable main mold 31. At the tip of the slide block 80 on the cavity side, a pair of upper and lower cam pins 93 that can be engaged with a pair of upper and lower cam grooves 91 are protruded from the front surface facing the slide holder 2b. The cam pins 93 axially support a cam roller 94 so as to be rotatable.

[0042] The cam pin 93 of the slide block 80 engages with the cam groove 91 of the slide holder 2b, thereby interlocking the slide holder 2b and the slide block 80. As the cam pin 93 engages with the cam groove 91 and moves within the cam groove 91, the cam roller 94 rolls while sliding against the key 92. In other words, the slide holder 2b and the slide block 80 are provided so as to be movable relative to each other via the cam mechanism.

[0043] The slide block 80, with its back surface in sliding contact with the front surface of the movable main mold 31, is slidably guided in a first direction along a first slide key 141 protruding from the front surface of the movable main mold 31. The slide holder 2b, with its back surface in sliding contact with the front surface of the slide block 80, is slidably guided in a second direction along a second slide key 142 protruding from the front surface of the movable main mold 31.

[0044] The configuration on the movable second platen 8 side is similar to that of the comparative mold device M2 described in Figure 5, and four actuators are each attached to a cylinder mounting portion 23 and arranged radially around the movable second platen 8.

[0045] The connecting means for connecting the slide holder 2b to the actuator includes a T-shaped slot 4 and a connecting member 72 having a T-shaped head portion 73 at its tip that can engage with the slot 4, as in the mold device M2 of the comparative example. The slot 4 is formed at the base end of the slide block 80 on the opposite side to the cavity. The rear end of the connecting member 72 is connected to the tip of the drive rod 62 of the cylinder 61. The connecting member 72 is provided so that its tip protrudes toward the slide block 80, and the head portion 73 is engaged with the slot 4 to connect the slide block 80 to the drive rod 62 of the cylinder 61 via the connecting means.

[0046] The operation of the slide 10b in the mold device M1 configured in this manner will be described in detail with reference to Figs. 3 and 4. Fig. 3 is a schematic diagram for explaining the operation of the slide included in the mold device according to the first embodiment. Fig. 4 is a cross-sectional view of Fig. 3. The left side of Figs. 3 and 4 shows a schematic diagram of the slide 10b when the slide mold 1b shown in Fig. 1 is in a mold closed state, and the right side of Figs. 3 and 4 shows a schematic diagram of the slide 10b when the slide mold 1b shown in Fig. 2 is in a mold open state. The cross-sectional view of Fig. 4 shows a combination of cross sections of each component so that the operation of the slide 10b can be understood.

[0047] In the die device M1, when closing the die in die casting, the drive rod 62 of the cylinder 61 is extended, so that the connecting member 72 presses the slide block 80 inward toward the cavity, and the slide block 80 moves forward along the first direction. While the cam pin 93 moves forward along the first direction with the forward movement of the slide block 80, the cam pin 93 presses the slide holder 2b inward along the second direction (diagonally downward to the left in Figs. 3 and 4). As a result, in conjunction with the forward movement of the slide block 80 in the first direction, the slide holder 2b moves forward by a movement distance L toward the inside along the second direction. As a result, the slide die 1b moves forward together with the slide holder 2b along the second direction in the recess 134 of the movable side insert 30, and the die is closed.

[0048] When die casting is completed and the mold is opened, the drive rod 62 of the cylinder 61 is driven to retract, so that the connecting member 72 presses the slide block 80 toward the outside away from the cavity, and the slide block 80 moves backward along the first direction. While the cam pin 93 moves backward along the first direction with the slide block 80 moving backward, the cam pin 93 presses the slide holder 2b toward the outside along the second direction (toward the diagonally upward right direction in Figs. 3 and 4). As a result, in conjunction with the slide block 80 moving backward in the first direction, the slide holder 2b moves backward by the movement distance L toward the outside along the second direction. As a result, the slide mold 1b moves backward together with the slide holder 2b along the second direction in the recess 134 of the movable side insert 30, and the mold is opened.

[0049] As described above, by using the die device M1 according to this embodiment, the die can be opened by extracting the slide die 1b in a direction different from the direction parallel to the operating axis of the actuator for driving the slide die 1b to open and close. In this way, the die device M1 has a high degree of freedom in the moving direction of the slide die 1b, so that the slide die 1b can be moved in various directions according to the product shape. Therefore, the die device M1 according to this embodiment can satisfactorily extract the slide die 1b. As a result, it is possible to suppress an increase in excess material and the occurrence of porosity that may occur when there is a problem in extracting the slide die 1b, thereby improving the casting quality. [Explanation of symbols]

[0050] 1a, 1b Slide type 2a, 2b Slide holder 3 Connected members 4 Slots 5 Movable platen 7 Tie Bar 8 Movable second platen 9 Movable mold Slides 10a and 10b 34, 134 recess 23 Cylinder mounting part 24 Rod recess 30 Movable side insert 31 Movable side main mold 32 Molding section 33 Molding surface 40, 140 Support part 41 Slide key 61 Cylinder 62 Drive rod 72 Connecting members 73 Head section 80 Slide Block 91 Cam groove 92 Keys 93 Campin 94 Cam Roller 141 1st slide key 142 Second slide key L Travel distance M1, M2 mold equipment

Claims

[Claim 1] A fixed mold; A movable mold that is movable in a mold opening / closing direction to approach and move away from the fixed mold; a slide mold held by a slide holder slidably provided on the movable mold; a slide block slidably provided on the movable die; an actuator that moves the slide holder via the slide block by moving a drive rod having a connecting member that can be engaged with a slot formed in the slide block back and forth along a direction substantially perpendicular to the mold opening and closing direction; a cam mechanism for changing a moving direction of the slide holder, which is movable within a plane substantially perpendicular to the mold opening / closing direction, to a direction different from the advancing / retracting direction of the drive rod; having The cam mechanism includes: a cam groove provided in the slide holder; a cam pin that is provided in the slide block and moves within the cam groove while engaging with the cam groove; A mold apparatus having the above structure.

Images