Die-casting die with inward shrinkage core-removing function

Abstract

The invention relates to a die-casting die with an inward shrinkage depoling function. The die-casting die comprises a base. The rear mold plate is fixedly arranged on the base; the rear mold sliding block seats are arranged on the rear mold plate in a sliding manner, and the multiple rear mold sliding block seats are close to or away from each other; the rear mold core is fixedly arranged on the rear mold plate; the inward shrinkage pitched roofs are located between the rear mold core and the rear mold sliding block seat, the multiple inward shrinkage pitched roofs are arranged around the rear mold core and are divided into two groups, and the inward shrinkage pitched roofs in each group are not adjacent to each other; and the pitched roof driving assembly is connected with the multiple inward-retracting pitched roofs and used for having an initial ejection state and a final ejection state, in the initial ejection state, the two sets of inward-retracting pitched roofs move upwards, one set of inward-retracting pitched roofs get close to each other, and in the final ejection state, the inward-retracting pitched roofs which do not get close to each other in the initial ejection state move upwards and get close to each other. The manufacturing method has the effect that the sleeve type element with the contracted inner diameter can be manufactured.

Description

Technical Field

[0001] The present application relates to the field of die-casting devices, and in particular to a die-casting mold with an inward-shrinking and core-stripping function. Background Art

[0002] A die-casting mold is a tool used to cast metal parts, performed on a dedicated die-casting forging machine. The basic die-casting process involves molten metal being poured into the mold cavity at either a low or high speed. The mold has a movable cavity surface, which is pressurized and forged as the molten metal cools. This eliminates shrinkage defects in the blank and achieves a forged, crushed grain structure within the blank.

[0003] In the related art, in order to manufacture sleeve-type components with shrinking inner diameters, a combination of circumferential cores and central cores is used to adapt to the inner cavity of the components. When the mold is closed, multiple circumferential cores swing open, and the central core moves up to enter the inner side of the circumferential cores. When the mold is opened, the central core is pulled down, and multiple circumferential cores swing and shrink. However, the swinging of the circumferential cores is not just a simple rotation, but needs to be coordinated with corresponding sliding, which leads to the defect of overly complex mold structure. Summary of the Invention

[0004] In order to manufacture sleeve-type components with shrinking inner diameters, the present application provides a die-casting mold with an inner shrinking and core-stripping function.

[0005] The present application provides a die-casting mold with an inward-shrinking and core-stripping function, which adopts the following technical solutions: A die-casting mold with an inward-shrinking and core-stripping function, comprising base; a rear template, fixedly arranged on the base; a rear mold core, fixedly arranged on the upper side of the initial inward-retracting push plate; A rear mold slider seat is slidably arranged on the rear mold plate, and a plurality of rear mold slider seats move closer to or away from each other; a rear mold core, fixedly arranged on the rear mold plate; Inwardly contracted inclined tops are located between the rear mold core and the rear mold slider seat, a plurality of the inwardly contracted inclined tops are arranged around the rear mold core, and the plurality of the inwardly contracted inclined tops are divided into two groups, and the inwardly contracted inclined tops in each group are not adjacently arranged; The inclined ejector drive assembly is connected to the plurality of the retracted inclined ejectors and is used to have an initial ejection state and a final ejection state. In the initial ejection state, both groups of the retracted inclined ejectors move upward, and one group of the retracted inclined ejectors also moves closer to each other. In the final ejection state, the retracted inclined ejectors that did not move closer to each other in the initial ejection state move upward and move closer to each other.

[0006] By adopting the above technical solution, during the first ejection, both groups of inward-retracting inclined tops are moved upward, but one group of inward-retracting inclined tops is still close to each other. Then, while the workpiece is separated from the rear mold core, one group of inward-retracting inclined tops is also moved away from the inner wall of the inner cavity of the workpiece. During the second ejection, the inward-retracting inclined tops that are still in contact with the inner cavity of the workpiece are moved upward and close to each other, so that the remaining group of inward-retracting inclined tops are separated from the inner wall of the inner cavity of the workpiece, thereby realizing demolding. In this design method, only the inward-retracting inclined tops need to move, the rear mold core moves, and there is a group of inward-retracting inclined tops at the same time, which requires both a simple vertical direction and a vertical rise plus horizontal movement. However, this orthogonal movement is relatively simple, so the mold structure is simple.

[0007] Preferably, the inclined top driving assembly includes a primary inward retracting push plate and a secondary inward retracting top plate, the primary inward retracting push plate is vertically slidably arranged on the upper side of the rear template, the primary inward retracting push plate is for the rear mold core to pass through, the primary inward retracting push plate is for the rear mold slider seat to slide, the primary inward retracting push plate is slidably connected to the inward retracting inclined top, and the sliding direction is orthogonal to the vertical direction and the horizontal direction; the secondary inward retracting top plate (62) is vertically slidably arranged on the base, the secondary inward retracting top plate (62) is located below the rear template, the secondary inward retracting top plate (62) is slidably connected to the inward retracting inclined top, and the sliding direction is orthogonal to the vertical direction and the horizontal direction.

[0008] By adopting the above technical solution, during the first ejection, both the initial inward-retracting push plate and the secondary inward-retracting ejector plate can be moved upward. During the second ejection, the secondary inward-retracting ejector plate can be moved upward. Therefore, through simple vertical movement, one group of inward-retracting inclined ejectors can be moved upward and closer together, while the other group of inward-retracting inclined ejectors can be simply moved upward first and then moved upward and closer together, thereby further simplifying the structure of the mold.

[0009] Preferably, the inward-retracting inclined top, the primary inward-retracting push plate and the secondary inward-retracting top plate are all structured such that T-shaped sliding blocks and sliding grooves are engaged with each other.

[0010] By adopting the above technical solution, the guiding connection between the inward-retracting inclined top and the primary inward-retracting push plate and the secondary inward-retracting top plate is realized, and the connection structure is simple and the two are easy to disassemble, thereby making the mold structure simple and the mold assembly simple.

[0011] Preferably, the inward-retracting inclined top connected to the initial inward-retracting push plate and the rear mold core are structured such that a slider and a sliding groove are engaged with each other.

[0012] By adopting the above technical solution, since the movement trajectory of the retracted inclined ejector during the first ejection is very important, which not only affects the retraction of the retracted inclined ejector this time, but also affects the retraction of another group of retracted inclined ejectors during the second ejection, a structure in which the slider and the groove are interlocked is provided.

[0013] Preferably, an external pressing component is provided on the initial inward retraction push plate, and the external pressing component is connected to the rear mold slider seat, and is used to apply a force to the rear mold slider seat to move closer to each other.

[0014] By adopting the above technical solution, since the horizontal sliding of the rear mold slider seat is achieved through the guide rod on the front mold plate, and the molten metal needs to be pressurized when flowing into the mold cavity, the external clamping component can prevent the shape stability of the mold cavity.

[0015] Preferably, the rear template is provided with a rear mold core, and a limiting penetration structure is provided between the inward-retracting inclined top connected to the secondary inward-retracting top plate and the rear mold core, so that the rear mold core forms an upward supporting force on the inward-retracting inclined top.

[0016] By adopting the above technical solution, during the first ejection, it is possible to more accurately prevent relative movement between the primary retracted push plate and the secondary retracted ejector plate, thereby making it less likely that the retracted inclined ejector will become stuck.

[0017] Preferably, the secondary retracted top plate is divided into a secondary retracted bottom and a secondary retracted surface portion, the secondary retracted bottom is slidably connected to the base, one secondary retracted surface portion is connected to one retracted inclined top, and the secondary retracted surface portion is slidably connected to the secondary retracted bottom.

[0018] By adopting the above technical solution, after the second ejection, a retracted inclined ejector can be moved upward separately, so that other demoulding working parameters can be adapted, and more different workpieces can be adapted.

[0019] Preferably, the secondary retracted bottom is provided with an initial bolt, which is threadedly mounted on the secondary retracted bottom, and the end face of the rod of the initial bolt abuts against the secondary retracted surface.

[0020] By adopting the above technical solution, firstly, it can play a leveling role so that multiple inward-retracted inclined tops can be maintained at the same height; secondly, when the inward-retracting parameters are different, the height of the secondary inward-retracting surface can be changed accordingly to adapt to different demolding working parameters while keeping the mold volume small.

[0021] Preferably, the secondary retracted portion is provided with a position adjustment slide and an inclined top slide, the position adjustment slide is horizontally slidable, the inclined top slide is connected to the retracted inclined top, and the inclined top slide is rotatably connected to the position adjustment slide to change the guide angle of the inclined top slide By adopting the above technical solution, the guide angle of the inclined top slide is changed to adapt to different retraction parameters, thereby improving the overall performance of the mold.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. During the first ejection, both sets of indented lifters are moved upward, but one set of indented lifters is still close to each other. In this way, while the workpiece is being separated from the rear mold core, one set of indented lifters is also moved away from the inner wall of the workpiece cavity. During the second ejection, the indented lifters that are still in contact with the workpiece cavity are moved upward and close to each other, so that the remaining set of indented lifters is separated from the inner wall of the workpiece cavity, thereby achieving demolding. In this design, only the indented lifters need to move, and the rear mold core moves. At the same time, there is one set of indented lifters, which requires both a simple vertical direction and vertical rise plus horizontal movement. However, this orthogonal movement is relatively simple, so the mold structure is simple. 2. During the first ejection, both the initial inward-retracting push plate and the secondary inward-retracting ejector plate can be moved upward. During the second ejection, the secondary inward-retracting ejector plate can be moved upward. Therefore, through simple vertical movement, one group of inward-retracting inclined ejectors can be moved upward and closer together, while the other group of inward-retracting inclined ejectors can be simply moved upward first and then moved upward and closer together, thereby further simplifying the structure of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a cross-sectional view of the mold made in the embodiment of the present application to illustrate the working principle during the first ejection.

[0024] Figure 2 This is a cross-sectional view of the mold made in the embodiment of the present application to illustrate the working principle during the second ejection.

[0025] Figure 3 This is a schematic diagram used to illustrate the coordination structure between the secondary retracted bottom portion and the secondary retracted surface portion in an embodiment of the present application.

[0026] Figure 4 This is a schematic diagram made to illustrate the coordination structure between the inward-retracted slanted top and the secondary inward-retracted surface portion in an embodiment of the present application.

[0027] Explanation of the accompanying reference numerals: 1. Base; 2. Rear template; 21. Rear mold core; 3. Rear mold slider seat; 4. Rear mold core; 5. Inward-retracting inclined top; 6. Inclined top drive assembly; 61. Primary inward-retracting push plate; 62. Secondary inward-retracting top plate; 621. Secondary inward-retracting bottom; 622. Secondary inward-retracting surface portion; 7. External tightening assembly; 8. Initial position bolt; 9. Position adjustment slide; 91. Inclined top slide. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 This application is described in further detail.

[0029] The embodiment of the present application discloses a die-casting mold with an inward-shrinking and core-stripping function.

[0030] Reference Figure 1 and Figure 2The die-casting mold with the inward-retracting core-stripping function includes a base 1, a rear template 2, a rear mold slider seat 3, a rear mold core 4, an inward-retracting inclined top 5 and an inclined top driving assembly 6, the rear template 2 is fixedly arranged on the base 1; the rear mold core 21 is fixedly arranged on the upper side of the initial inward-retracting push plate 61; the rear mold slider seat 3 is slidably arranged on the rear template 2, and multiple rear mold slider seats 3 move closer to or away from each other; the rear mold core 4 is fixedly arranged on the rear template 2; the inward-retracting inclined top 5 is located between the rear mold core 4 and the rear mold slider seat 3, multiple inward-retracting inclined tops 5 are arranged around the rear mold core 4, and multiple inward-retracting inclined tops 5 are divided into two groups, and the inward-retracting inclined tops 5 in each group are not adjacent to each other; the inclined top driving assembly 6 is connected to the multiple inward-retracting inclined tops 5, and the inclined top driving assembly 6 has an initial ejection state and a final ejection state. In the initial ejection state, the two groups of inward-retracting inclined tops 5 both move up, and one group of inward-retracting inclined tops 5 also move closer to each other. In the final ejection state, the inward-retracting inclined tops 5 that were not close to each other before move up and move closer to each other.

[0031] Reference Figure 1 and Figure 2 During the first ejection, both groups of inward-retracting inclined ejectors 5 are moved upward, but one group of inward-retracting inclined ejectors 5 is still close to each other. Then, while the workpiece is separated from the rear mold core 4, one group of inward-retracting inclined ejectors 5 is also separated from the inner wall of the inner cavity of the workpiece. During the second ejection, the inward-retracting inclined ejectors 5 that are still in contact with the inner cavity of the workpiece are moved upward and close to each other, so that the remaining group of inward-retracting inclined ejectors 5 are separated from the inner wall of the inner cavity of the workpiece, thereby realizing demolding. In this design method, only the inward-retracting inclined ejectors 5 need to move, the rear mold core 4 moves, and there is a group of inward-retracting inclined ejectors 5, which requires both a simple vertical direction and a vertical rise plus horizontal movement. However, this orthogonal movement is relatively simple, so the mold structure is simple.

[0032] Reference Figure 1 and Figure 2 In order to further optimize the structure of the mold, the following settings are correspondingly made. The inclined top driving assembly 6 includes an initial inward retraction push plate 61 and a secondary inward retraction top plate 62. The initial inward retraction push plate 61 is vertically slidably arranged on the upper side of the rear template 2. The initial inward retraction push plate 61 is for the rear mold core 4 to pass through. The initial inward retraction push plate 61 is for the rear mold slider seat 3 to slide. The initial inward retraction push plate 61 is slidably connected to the inward retraction inclined top 5. The secondary inward retraction top plate 62 is vertically slidably arranged on the base 1. The secondary inward retraction top plate 62 is located below the rear template 2. The secondary inward retraction top plate 62 is slidably connected to the inward retraction inclined top 5. It should be noted that the sliding direction between the inward retraction inclined top 5 and the initial inward retraction push plate 61 and the secondary inward retraction top plate 62 is orthogonal to the vertical direction and the horizontal direction.

[0033] Reference Figure 1 and Figure 2The working principle of the optimized inclined ejector drive assembly 6 is as follows: during the first ejection, both the initial inward-retracting push plate 61 and the secondary inward-retracting ejector plate 62 can be moved upward; during the second ejection, the secondary inward-retracting ejector plate 62 can be moved upward. Therefore, a simple vertical movement can be used to move one group of inward-retracting inclined ejectors 5 upward and closer together, while the other group of inward-retracting inclined ejectors 5 can be simply moved upward first and then moved upward and closer together, thereby further simplifying the structure of the mold.

[0034] In addition, in this embodiment, considering the convenience of assembling the components in the mold, the inward-retracting inclined top 5 and the primary inward-retracting push plate 61 and the secondary inward-retracting top plate 62 are all structured with T-shaped slider grooves. This not only realizes the guiding connection between the inward-retracting inclined top 5 and the primary inward-retracting push plate 61 and the secondary inward-retracting top plate 62, but also has a simple connection structure and is easy to disassemble, thereby making the mold structure simple and the mold assembly simple.

[0035] Reference Figure 1 and Figure 2 Since the present application is realized by the movement of two groups of inward-retracting inclined ejectors 5, and the movement requirements of the two groups of movement trajectories are relatively high, the following settings are made. First, during the first ejection, the movement of the inward-retracting inclined ejector 5 not only affects the retraction of the inward-retracting inclined ejector 5 this time, but also affects the retraction of the other group of inward-retracting inclined ejectors 5 during the second ejection. Therefore, the inward-retracting inclined ejector 5 connected to the initial inward-retracting push plate 61 and the rear mold core 4 are equipped with a slider groove, specifically a T-shaped slider groove.

[0036] Reference Figure 1 and Figure 2 Secondly, because the two groups of inward-retracting inclined ejectors 5 need to maintain synchronous movement in the vertical direction during the first ejection, a rear mold core 21 is fixedly provided on the upper side of the rear template 2, and a limiting through-structure is provided between the inward-retracting inclined ejector 5 connected to the secondary inward-retracting ejector plate 62 and the rear mold core 21. In this way, the rear mold core 21 will form an upward supporting force on the inward-retracting inclined ejector 5, so during the first ejection, it is possible to more accurately prevent relative movement between the primary inward-retracting push plate 61 and the secondary inward-retracting ejector plate 62, thereby preventing the inward-retracting inclined ejector 5 from getting stuck.

[0037] Reference Figure 3 and Figure 4In order to improve the adaptability of the mold, the mold can be adapted to a variety of demolding parameters, and the corresponding settings are as follows: first, the secondary retracted top plate 62 is divided into a secondary retracted bottom 621 and a secondary retracted surface portion 622; the secondary retracted bottom 621 is slidably connected to the base 1; a secondary retracted surface portion 622 is connected to a retracted inclined top 5; the secondary retracted surface portion 622 is slidably connected to the secondary retracted bottom 621; after the second ejection, one retracted inclined top 5 can be moved up separately to adapt to other demolding working parameters; for example, one of the retracted inclined tops 5 needs to have a different distance from the inner wall of the workpiece cavity to achieve demolding, thereby being able to adapt to more different workpieces.

[0038] Reference Figure 3 and Figure 4 Secondly, the secondary retracted bottom 621 is provided with an initial bolt 8, which is threadedly installed on the secondary retracted bottom 621, and the rod end face of the initial bolt 8 is in contact with the secondary retracted surface 622. In this way, when the retracted parameters are different, the height of the secondary retracted surface 622 can be changed accordingly. Specifically, if the retracted parameter is relatively large, that is, the upward movement unit distance and the horizontal movement distance are farther, the height of the secondary retracted surface 622 can be made higher, so that the rod of the retracted inclined top 5 does not need to be too long. Therefore, while keeping the mold volume small, it can adapt to different demoulding working parameters. In addition, it can also play a leveling role to adapt to assembly errors and production errors.

[0039] Reference Figure 3 and Figure 4 Thirdly, the secondary retracted surface portion 622 is provided with a positioning slide 9 and a tilted top slide 91. The positioning slide 9 is horizontally slidable, and the tilted top slide 91 is connected to the retracted tilted top 5. The tilted top slide 91 is rotatably connected to the positioning slide 9. In this way, the elevation angle of the tilted top slide 91 can be changed, and the guide angle of the tilted top slide 91 can also be changed to adapt to different retracted parameters, thereby improving the comprehensive performance of the mold.

[0040] Reference Figure 1 and Figure 2 In order to adapt to the working environment of the die-casting mold, an external tightening component 7 is provided on the initial inward retraction push plate 61. The external tightening component 7 is connected to the rear mold slider seat 3. The external tightening component 7 uses the elastic force of the spring to apply a force to the rear mold slider seat 3 to move closer to each other. When the molten metal flows into the mold cavity and the pressure changes, the external tightening component 7 can prevent the shape stability of the mold cavity.

[0041] The implementation principle of a die-casting mold with an inward-shrinking and core-demolding function in an embodiment of the present application is as follows: during the first ejection, both groups of inward-shrinking inclined tops 5 are moved upward, but one group of inward-shrinking inclined tops 5 is still close to each other. Then, while the workpiece is separated from the rear mold core 4, one group of inward-shrinking inclined tops 5 is also moved away from the inner wall of the inner cavity of the workpiece. During the second ejection, the inward-shrinking inclined tops 5 that are still in contact with the inner cavity of the workpiece are moved upward and close to each other, so that the remaining group of inward-shrinking inclined tops 5 are separated from the inner wall of the inner cavity of the workpiece, thereby realizing demolding. In this design method, only the inward-shrinking inclined tops 5 need to move, the rear mold core 4 moves, and there is a group of inward-shrinking inclined tops 5 at the same time, which requires both a simple vertical direction and a vertical rise plus horizontal movement, but this orthogonal movement is relatively simple, so the mold structure is simple.

[0042] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A die-casting mold with an inward-shrinking and core-stripping function, characterized in that: include: Base (1); A rear template (2) is fixedly arranged on the base (1); A rear mold slider seat (3) is slidably arranged on the rear mold plate (2), and a plurality of rear mold slider seats (3) are moved closer to or farther away from each other; A rear mold core (4) is fixedly arranged on the rear mold plate (2); An inwardly contracted inclined top (5) is located between the rear mold core (4) and the rear mold slider seat (3), and a plurality of the inwardly contracted inclined tops (5) are arranged around the rear mold core (4). The plurality of the inwardly contracted inclined tops (5) are divided into two groups, and the inwardly contracted inclined tops (5) in each group are not arranged adjacent to each other; The inclined ejector drive assembly (6) is connected to the plurality of the inward-retracting inclined ejectors (5) and is used to have an initial ejection state and a final ejection state. In the initial ejection state, both groups of the inward-retracting inclined ejectors (5) move upward, and one group of the inward-retracting inclined ejectors (5) also moves closer to each other. In the final ejection state, the inward-retracting inclined ejectors (5) that did not move closer to each other in the initial ejection state move upward and move closer to each other.

2. The die-casting mold with the inward-shrinking and core-stripping function according to claim 1, characterized in that: The inclined top driving assembly (6) includes an initial inward retraction push plate (61) and a secondary inward retraction top plate (62), wherein the initial inward retraction push plate (61) is vertically slidably arranged on the upper side of the rear template (2), the initial inward retraction push plate (61) is provided for the rear mold core (4) to pass through, and the initial inward retraction push plate (61) is provided for the rear mold slider seat (3) to slide, the initial inward retraction push plate (61) is slidably connected to the inward retraction inclined top (5), and the sliding direction is a direction orthogonal to the vertical direction and the horizontal direction; the secondary inward retraction top plate (62) is vertically slidably arranged on the base (1), the secondary inward retraction top plate (62) is located below the rear template (2), and the secondary inward retraction top plate (62) is slidably connected to the inward retraction inclined top (5), and the sliding direction is a direction orthogonal to the vertical direction and the horizontal direction.

3. The die-casting mold with the inward-shrinking and core-stripping function according to claim 2, characterized in that: The inward-retracting inclined top (5), the primary inward-retracting push plate (61), and the secondary inward-retracting top plate (62) are all structured such that T-shaped sliding blocks and sliding grooves are engaged with each other.

4. The die-casting mold with the inward-shrinking and core-stripping function according to claim 2, characterized in that: The inward-retracting inclined top (5) connected to the initial inward-retracting push plate (61) and the rear mold core (4) are structured such that a slider and a sliding groove are engaged with each other.

5. The die-casting mold with the inward-shrinking and core-stripping function according to claim 2, characterized in that: An external tightening assembly (7) is provided on the initial inward retraction push plate (61), and the external tightening assembly (7) is connected to the rear mold slider seat (3) and is used to apply a force to the rear mold slider seat (3) to move the rear mold slider seat (3) closer to each other.

6. The die-casting mold with the inward-shrinking and core-stripping function according to claim 2, characterized in that: The rear template (2) is provided with a rear mold core (21), and a limiting penetration structure is provided between the inward-retracting inclined top (5) connected to the secondary inward-retracting top plate (62) and the rear mold core (21), so as to enable the rear mold core (21) to form an upward supporting force on the inward-retracting inclined top (5).

7. The die-casting mold with the inward-shrinking and core-stripping function according to claim 2, characterized in that: The secondary retracted top plate (62) is divided into a secondary retracted bottom portion (621) and a secondary retracted surface portion (622); the secondary retracted bottom portion (621) is slidably connected to the base (1); one secondary retracted surface portion (622) is connected to one of the retracted inclined top portions (5); and the secondary retracted surface portion (622) is slidably connected to the secondary retracted bottom portion (621).

8. The die-casting mold with the inward-shrinking and core-stripping function according to claim 7, characterized in that: The secondary retracted bottom (621) is provided with an initial bolt (8), which is threadedly mounted on the secondary retracted bottom (621), and the end face of the rod of the initial bolt (8) abuts against the secondary retracted surface (622).

9. The die-casting mold with the inward-shrinking and core-stripping function according to claim 8, characterized in that: The secondary retracted surface portion (622) is provided with a position adjustment slide (9) and an inclined top slide (91); the position adjustment slide (9) is arranged to slide horizontally; the inclined top slide (91) is connected to the retracted inclined top (5); the inclined top slide (91) is rotatably connected to the position adjustment slide (9) for changing the guide angle of the inclined top slide (91).

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