An automobile air compressor crankcase die-casting mold

Abstract

The utility model relates to an automobile air compressor crankcase die -casting die, including upper mould frame and lower mould frame, install upper mould core and lower mould core between upper mould frame and lower mould frame, be provided with mould cavity between upper mould core and lower mould core, the lower mould core upper end middle part is embedded and is installed with lower hole position insert piece, the lower mould frame upper end is located the four -around of lower mould core and is installed front core -pulling block, rear core -pulling block and two side core -pulling blocks, front core -pulling block one end is equipped with the side cavity insert column of strip shape, both sides of side cavity insert column all are set up a sliding slot, the one end of sliding slot penetrates side cavity insert column rear end face, the other end of sliding slot penetrates the front end face of front core -pulling block, the front end of front core -pulling block is embedded and is installed with a limit block between two sliding slots, each sliding slot all is connected with one before -and -after sliding edge insert block, the outside wall of edge insert block is arc surface, the utility model discloses " side cavity insert column + edge insert block " combination of front core -pulling block, can accurate forming crankcase's front side cavity and arc groove.

Description

Technical Field

[0001] This utility model relates to the field of automotive air compressor crankcase manufacturing technology, and in particular to a die-casting mold for automotive air compressor crankcases. Background Technology

[0002] The crankcase of an automotive air compressor is a core component of the air compressor. For example... Figure 8 As shown, the crankcase of an automotive air compressor includes a crankcase body 24. The crankcase body 24 has a front cavity 25. Two arc grooves 27 are formed on both sides of the front cavity 25, with a maximum lateral distance A between the two arc grooves 27. A circular through-hole 28 is formed at the top of the front cavity 25, and a circular through-hole 29 is formed at the front end of the front cavity 25. A central hole 26 is formed at the bottom center of the front cavity 25. The diameters of both the circular through-hole 28 and the circular through-hole 29 are smaller than A. After the front cavity 25 and the two arc grooves 27 are formed, the core-pulling block cannot be demolded as a whole. Conventional die-casting molds can only form the front cavity 25, and then the corresponding arc grooves 27 are machined onto the inner wall of the front cavity 25 using a CNC machine tool. This process is inefficient and costly. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a die-casting mold for an automotive air compressor crankcase, which is a combination of "side cavity insert + edge insert" for the front core-pulling block. This combination can accurately form the front side cavity and arc groove of the crankcase. After forming, the edge insert slides and separates from the side cavity insert. The edge insert is ejected along with the formed crankcase. Finally, the edge insert is separated from the inner wall of the crankcase by a tool.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: A die-casting mold for an automotive air compressor crankcase is provided, comprising an upper mold frame and a lower mold frame. An upper mold core and a lower mold core are stacked vertically between the upper mold frame and the lower mold frame. A mold cavity is provided between the upper mold core and the lower mold core. A lower hole insert is embedded in the middle of the upper end of the lower mold core. A front core-pulling block, a rear core-pulling block, and two side core-pulling blocks are respectively installed around the lower mold core on the upper end of the lower mold frame. One end of the front core-pulling block has a long strip-shaped side cavity insert. The column has a sliding groove on both its left and right sides. One end of the sliding groove passes through the rear end face of the column, and the other end passes through the front end face of the front core-pulling block. A limiting block is embedded between the two sliding grooves at the front end of the front core-pulling block. Each sliding groove is connected to a side insert that slides back and forth. The outer wall of the side insert is an arc surface. The bottom of the column is connected to the lower hole insert. The front core-pulling block, the rear core-pulling block, and the two side core-pulling blocks surround the column and the two side inserts.

[0005] As a supplement to the technical solution described in this utility model, a mold foot is installed on both sides of the lower end of the lower mold frame, and a top plate assembly is installed between the two mold feet. The top plate assembly is provided with a push rod that is vertically inserted into the mold cavity.

[0006] As a supplement to the technical solution described in this utility model, the slide is a dovetail groove, and the edge insert is provided with a guide part that cooperates with the dovetail groove.

[0007] As a supplement to the technical solution described in this utility model, the front end of the front core-pulling block and the limiting block are connected by fasteners.

[0008] As a supplement to the technical solution described in this utility model, four slider seats are arranged around the lower mold core at the upper end of the lower mold frame. The inner sides of the four slider seats are respectively fixed with a front core-pulling block, a rear core-pulling block, and two side core-pulling blocks. An inclined guide post is installed at the lower end of the upper mold frame. One end of the inclined guide post is inserted into the rear slider seat at an angle. A driving cylinder is installed on the front side and the left and right sides of the lower mold frame. Except for the rear slider seat, the other three slider seats are respectively connected to the three driving cylinders one by one.

[0009] As a supplement to the technical solution described in this utility model, the upper end of the lower mold frame has a slider seat located at the front, and a flow divider cone is provided at its upper end. A material cylinder is installed in the upper part of the upper mold frame above the flow divider cone. A graded flow channel is provided at the upper end of the lower mold core between the flow divider cone and the mold cavity.

[0010] Beneficial effects: This utility model relates to a die-casting mold for an automotive air compressor crankcase. The combination of "side cavity insert + edge insert" in the front core-pulling block can accurately form the front side cavity and arc groove of the crankcase. After forming, the edge insert slides and separates from the side cavity insert. The edge insert is ejected along with the formed crankcase. Finally, the edge insert is separated from the inner wall of the crankcase by a tool. The arc surface and arc groove have a high degree of fit. The front side cavity and arc groove of the crankcase are formed in one step, eliminating the need for subsequent CNC machine tool processing, simplifying the processing flow and improving production efficiency. The rear core-pulling block is linked to the mold opening action (driven by inclined guide post). The front and side core-pulling blocks are controlled by independent hydraulic cylinders, which can realize the orderly action of "rear core pulling → front core pulling → side core pulling". The core pulling synchronization error is ≤0.5s, reducing the deformation rate of the casting. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of the present invention from the left view direction;

[0012] Figure 2 This is a sectional view of the present invention from the main viewing direction;

[0013] Figure 3This is a schematic diagram of the structure of the front core-pulling block described in this utility model;

[0014] Figure 4 This is a schematic diagram of the front core-pulling block at different angles as described in this utility model;

[0015] Figure 5 This is a schematic diagram of the edge inlay block described in this utility model;

[0016] Figure 6 This is a schematic diagram of the structure of the upper mold frame and the upper mold core described in this utility model;

[0017] Figure 7 This is a schematic diagram of the structure of the lower mold frame and the lower mold core described in this utility model;

[0018] Figure 8 This is a structural diagram of the product manufactured under this utility model.

[0019] Illustration: 1. Upper mold frame, 2. Upper mold core, 3. Lower hole insert, 4. Lower mold core, 5. Lower mold frame, 6. Rear core-pulling block, 7. Front core-pulling block, 8. Slider seat, 9. Inclined guide post, 10. Graded flow channel, 11. Flow divider cone, 12. Material cylinder, 13. Drive cylinder, 14. Top plate assembly, 15. Ejector rod, 16. Limiting block, 17. Mold foot, 18. Side cavity insert, 19. Edge insert, 20. Slide groove, 21. Arc surface, 22. Side core-pulling block, 23. Guide part, 24. Crankcase body, 25. Front side cavity, 26. Center hole, 27. Arc groove, 28. Circular through hole one, 29. Circular through hole two. Detailed Implementation

[0020] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0021] The embodiments of this utility model relate to a die-casting mold for an automotive air compressor crankcase, such as... Figure 1-8As shown, the system includes an upper mold frame 1 and a lower mold frame 5. An upper mold core 2 and a lower mold core 4, stacked vertically, are installed between the upper mold frame 1 and the lower mold frame 5. A mold cavity is provided between the upper mold core 2 and the lower mold core 4. A lower hole insert 3 is embedded in the middle of the upper end of the lower mold core 4. A front core-pulling block 7, a rear core-pulling block 6, and two side core-pulling blocks 22 are respectively installed around the lower mold core 4 on the upper end of the lower mold frame 5. One end of the front core-pulling block 7 has a long, narrow side cavity insert 18. A groove 20 is formed on both the left and right sides of the side cavity insert 18. One end of the slide groove 20 passes through the rear end face of the side cavity insert 18, and the other end of the slide groove 20 passes through the front end face of the front core-pulling block 7. The front end of the front core-pulling block 7 is located between the two slide grooves 20 and a limiting block 16 is embedded therein. Each slide groove 20 is connected to a side insert 19 that slides back and forth. The outer side wall of the side insert 19 is an arc surface 21. The bottom of the side cavity insert 18 is connected to the lower hole insert 3. The front core-pulling block 7, the rear core-pulling block 6, and the two side core-pulling blocks 22 surround the side cavity insert 18 and the two side inserts 19.

[0022] When the crankcase is being produced, the front core-pulling block 7 is closed, and the limiting block 16 at the front end of the front core-pulling block 7 pushes the two side inserts 19 together toward the mold cavity; after the crankcase is formed, the front core-pulling block 7 is opened, and the two side inserts 19 slide and separate from the side cavity inserts 18 of the front core-pulling block 7, and the two side inserts 19 will remain inside the crankcase.

[0023] The lower mold frame 5 has a mold foot 17 installed on both sides of its lower end, and a top plate assembly 14 is installed between the two mold feet 17. The top plate assembly 14 is provided with a push rod 15 that is vertically inserted into the mold cavity.

[0024] The slide groove 20 is a dovetail groove, and the edge insert 19 is provided with a guide part 23 that cooperates with the dovetail groove; the gap between the dovetail groove and the guide part 23 is controlled at 0.02 to 0.03 mm, which ensures smooth sliding and prevents molten metal from seeping into the slide groove.

[0025] The front end of the core-pulling block 7 and the limiting block 16 are connected by fasteners, and the fasteners are countersunk bolts.

[0026] The lower mold frame 5 has four slider seats 8 arranged around the lower mold core 4 at its upper end. The inner sides of the four slider seats 8 are respectively fixed with a front core-pulling block 7, a rear core-pulling block 6, and two side core-pulling blocks 22. The lower end of the upper mold frame 1 is equipped with an inclined guide post 9. One end of the inclined guide post 9 is inserted into the rear slider seat 8 at an angle. The rear slider seat 8 is provided with an inclined guide hole that matches the inclined guide post 9. The inclined guide hole has an inclination angle of 15°. The front side and the left and right sides of the lower mold frame 5 are each equipped with a driving cylinder 13. Except for the rear slider seat 8, the other three slider seats 8 are respectively connected to the three driving cylinders 13 one by one.

[0027] When the mold is closed, the inclined guide post 9 is inserted into the guide hole. When the mold is opened, the upper mold frame 1 moves upward. The inclined guide post 9 drives the rear slide block 8 and the rear core-pulling block 6 to move backward synchronously through the inclined guide hole. No additional power source is required, and it is linked with the mold opening action. The outer side of the slide block 8 corresponding to the front core-pulling block 7 and the two side core-pulling blocks 22 is connected to their respective drive cylinders 13. The extension and retraction of the three drive cylinders 13 are independently controlled by the hydraulic system to achieve precise advance and retreat of the front core-pulling block 7 and the two side core-pulling blocks 22.

[0028] The upper end of the lower mold frame 5 has a slider seat 8 located at the front, and a flow divider cone 11 is provided on its upper end. The upper part of the upper mold frame 1 has a material cylinder 12 installed above the flow divider cone 11. The upper end of the lower mold core 4 has a graded flow channel 10 located between the flow divider cone 11 and the mold cavity.

[0029] When a crankcase is needed, the entire mold is first installed on the die-casting machine. Then, the upper mold frame 1, lower mold frame 5, upper mold core 2, and lower mold core 4 are joined together. The front core-pulling block 7, rear core-pulling block 6, and two side core-pulling blocks 22 surround the side cavity insert 18 and two edge inserts 19 to form the outer wall of the crankcase 24. A long strip-shaped side cavity insert 18 is provided at one end of the front core-pulling block 7 near the mold cavity. The side cavity insert 18 and the front core-pulling block 7 are integrally formed. Two sliding grooves 20 are symmetrically opened on the left and right sides of the side cavity insert 18. Each sliding groove 20 is slidably connected to an edge insert 19. The outer side wall of the edge insert 19 is an arc surface 21, which is consistent with the arc groove 27 of the inner side wall of the crankcase 24. The overall shape of the side cavity insert 18 and the two edge inserts 19 is consistent with the front side cavity 25 of the crankcase 24. The arc grooves 27 on both sides are perfectly matched. The lower hole insert 3 is connected to the side cavity insert 18. The lower hole insert 3 is used to form the center hole 26. Then, molten metal is injected into the mold cavity and pressure is maintained in the mold by the die casting machine. After completion, the mold is opened. The rear slide block 8 and the rear core-pulling block 6 are moved backward synchronously by the inclined guide post 9. The front core-pulling block 7 and the two side core-pulling blocks 22 are moved backward by their respective drive cylinders 13. The front core-pulling block 7 moves backward with the side cavity insert 18. The two side inserts 19 slide and separate from the side cavity insert 18. The two side inserts 19 remain inside the crankcase body 24. The lower mold frame 5 is equipped with a top plate assembly 14 and a push rod 15. Then, the top plate assembly 14 is activated and the push rod 15 pushes the crankcase body 24 out of the mold cavity. Finally, the side inserts 19 are separated from the inner wall of the crankcase by a tool.

[0030] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0031] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0032] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0033] The above provides a detailed description of a die-casting mold for an automotive air compressor crankcase. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A die-casting mold for an automotive air compressor crankcase, comprising an upper mold frame (1) and a lower mold frame (5), wherein an upper mold core (2) and a lower mold core (4) stacked vertically are installed between the upper mold frame (1) and the lower mold frame (5), and a mold cavity is provided between the upper mold core (2) and the lower mold core (4), characterized in that: The lower mold core (4) has a lower hole insert (3) embedded in the middle of its upper end. The upper end of the lower mold frame (5) is equipped with a front core-pulling block (7), a rear core-pulling block (6), and two side core-pulling blocks (22) around the lower mold core (4). The front core-pulling block (7) has a long strip-shaped side cavity insert (18) at one end. A sliding groove (20) is opened on both the left and right sides of the side cavity insert (18). One end of the sliding groove (20) passes through the rear end face of the side cavity insert (18), and the other end of the sliding groove (20) passes through the front core-pulling block. (7) The front end of the front core-pulling block (7) is located between two slide grooves (20) and a limiting block (16) is embedded. Each slide groove (20) is connected to a side insert (19) that slides back and forth. The outer side wall of the side insert (19) is an arc surface (21). The bottom of the side cavity insert (18) is connected to the lower hole insert (3). The front core-pulling block (7), the rear core-pulling block (6) and the two side core-pulling blocks (22) surround the side cavity insert (18) and the two side inserts (19).

2. The die-casting mold for an automotive air compressor crankcase according to claim 1, characterized in that: A mold foot (17) is installed on both sides of the lower end of the lower mold frame (5), and a top plate assembly (14) is installed between the two mold feet (17). The top plate assembly (14) is provided with a push rod (15) that is vertically inserted into the mold cavity.

3. The die-casting mold for an automotive air compressor crankcase according to claim 1, characterized in that: The slide (20) is a dovetail groove, and the edge insert (19) is provided with a guide part (23) that cooperates with the dovetail groove.

4. The die-casting mold for an automotive air compressor crankcase according to claim 1, characterized in that: The front end of the aforementioned core-pulling block (7) is connected to the limiting block (16) by fasteners.

5. The die-casting mold for an automotive air compressor crankcase according to claim 1, characterized in that: The upper end of the lower mold frame (5) is surrounded by four slider seats (8) around the lower mold core (4). The inner sides of the four slider seats (8) are respectively fixed with a front core-pulling block (7), a rear core-pulling block (6) and two side core-pulling blocks (22). The lower end of the upper mold frame (1) is equipped with an inclined guide post (9). One end of the inclined guide post (9) is inserted into the rear slider seat (8). The front side and the left and right sides of the lower mold frame (5) are each equipped with a driving cylinder (13). Except for the rear slider seat (8), the other three slider seats (8) are respectively connected to the three driving cylinders (13).

6. The die-casting mold for an automotive air compressor crankcase according to claim 1, characterized in that: The upper end of the lower mold frame (5) is located at the front of the slider seat (8), and a flow divider cone (11) is provided at its upper end. The upper part of the upper mold frame (1) is equipped with a material cylinder (12) above the flow divider cone (11). The upper end of the lower mold core (4) is provided with a graded flow channel (10) between the flow divider cone (11) and the mold cavity.

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