An integrated heat sink forming structure for a die-casting mold

Abstract

The present invention relates to an integrated heat sink forming structure for a die-casting mold, which includes a lower die base, a lower die core and a cavity structure. The lower die core is embedded and installed in the middle of the upper end surface of the lower die base. A concave cavity structure is arranged in the middle of the upper end surface of the lower die core. A heat sink forming insert whose lower end passes through the lower die core and the lower die base is embedded and installed in the middle of the cavity structure. The heat sink forming insert includes a sheet-shaped body, a middle forming groove and a side forming groove. There are several sheet-shaped bodies arranged vertically and side by side in a fitting manner. At least one middle forming groove is arranged in the middle of the upper end surface of each sheet-shaped body. A side forming groove is arranged between adjacent sheet-shaped bodies. An internal threaded hole is arranged inside the lower end of the sheet-shaped body, and a threaded screw rod is vertically installed on the internal threaded hole. The present invention has the characteristics of simple structure, low assembly difficulty, convenient for workers to maintain, and convenient for product demolding.

Description

Technical Field

[0001] The present invention relates to the technical field of die-casting mold accessories, and particularly to an integrated heat sink forming structure for a die-casting mold. Background Art

[0002] The cylinder block structure generally works in a high-temperature and high-pressure environment. In order to enable the cylinder block structure to better complete its work and improve the service life of the cylinder block structure, some heat dissipation structures need to be designed on the surface of the cylinder block. The conventional heat dissipation structures are some sheet-like structures. When the cylinder block structure is generally produced by a die-casting mold, sheet inserts are usually selected to assist the die-casting mold in forming the heat dissipation structure. However, a very large clamping force will be formed between the sheet insert and the heat dissipation structure. In order to facilitate the demolding of the product, a large number of ejector pin structures need to be installed between the sheet inserts. And due to the long-term use of the ejector pins, these ejector pin structures need to be replaced from time to time. Each replacement requires a large amount of time and manpower for re-assembly. In order to solve the above problems, that is, to ensure smooth demolding and reduce the maintenance cost, a new heat sink forming structure needs to be designed. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an integrated heat sink forming structure for a die-casting mold, which has the characteristics of simple structure, low assembly difficulty, convenient maintenance for workers, and convenient demolding of products.

[0004] The technical solution adopted by the present invention to solve its technical problems is: to provide an integrated heat sink forming structure for a die-casting mold, including a lower mold base, a lower mold core and a cavity structure. The lower mold core is embedded and installed in the middle of the upper end surface of the lower mold base. The middle of the upper end surface of the lower mold core is provided with a concave cavity structure. It is characterized in that: a heat sink forming insert whose lower end passes through the lower mold core and the lower mold base is embedded and installed in the middle of the cavity structure. The heat sink forming insert includes a sheet body, a middle forming groove and a side forming groove. There are several sheet bodies arranged vertically and side by side in a fitting manner. At least one middle forming groove is provided in the middle of the upper end surface of each sheet body. A side forming groove is provided between adjacent sheet bodies. An internal threaded hole is provided inside the lower end of the sheet body. A threaded screw rod is vertically installed on the internal threaded hole. The lower ends of the threaded screw rods are all provided with laterally arranged driving gears. A driving rack meshing with the driving gears is arranged behind the driving gears. The driving rack drives all the driving gears to rotate all at once or gradually. The driving rack drives the threaded screw rods to rotate. The threaded screw rods drive the sheet bodies to move up and down through the internal threaded holes.

[0005] In this technical solution, several sheet-shaped bodies are provided to facilitate the assembly of the heat sink forming inserts by workers. At the same time, internal threaded holes and threaded screw rods are provided at the lower ends of the sheet-shaped bodies to facilitate the preliminary pre-removal of the heat dissipation structure and the sheet-shaped bodies, greatly reducing the clamping force between the heat dissipation structure and the heat sink forming inserts, facilitating product demolding, and also reducing the number of ejector pins used, which is convenient for workers to maintain.

[0006] As a supplement to this technical solution, guiding convex blocks are provided on the front and rear sides of the sheet-shaped body, and guiding grooves matching the guiding convex blocks are provided at the positions where the lower die base and the lower die core install the heat sink forming inserts. In this technical solution, the guiding convex blocks and the guiding grooves are provided to facilitate the stable up and down movement of the sheet-shaped body. At the same time, the upper side of the guiding convex block and the limit position at the upper end of the guiding groove can limit the sheet-shaped body, which is convenient for guiding workers to install.

[0007] When installing this device, workers first need to calculate the protruding length of the threaded screw rod, and then rotate the threaded screw rod to make the protruding length of the threaded screw rod consistent with the length calculated in advance. After completion, the sheet-shaped body is inserted from the installation opening of the lower die base, the guiding convex blocks and the guiding grooves match, and at the same time, ensure that the sheet-shaped bodies are inserted into the lower die core one by one.

[0008] As a supplement to this technical solution, a die foot structure is installed on the lower end surface of the lower die base, and a driving oil cylinder is horizontally installed inside the die foot structure, and the main shaft of the driving oil cylinder is connected to a driving rack.

[0009] In this technical solution, the driving oil cylinder is used to control the lateral movement of the driving rack, the driving rack is used to drive the driving gear, the driving gear is used to control the rotation of the threaded screw rod, and the rotation of the threaded screw rod drives the up and down movement of the sheet-shaped body.

[0010] As a supplement to this technical solution, the driving rack and the threaded screw rod are integrally formed. In order to ensure the structural strength between the driving rack and the threaded screw rod, an integrally formed part is selected, which can ensure the overall structural strength.

[0011] As a supplement to this technical solution, a stable table is provided below the heat sink forming insert, and a limiting cylindrical convex platform embedded in the stable table is provided on the lower end surface of the driving gear. By providing the stable table, the operation of the driving gear can be effectively stabilized, ensuring that there is no jamming during operation.

[0012] A part of the lower side of the driving rack is embedded in the stable table to ensure that the driving rack runs more stably and smoothly horizontally.

[0013] As a supplement to this technical solution, a stable bearing is sleeved on the limiting cylindrical boss, and the stable bearing is embedded and installed on the stable table. By installing the stable bearing, the stable operation of the threaded lead screw can be ensured.

[0014] As a supplement to this technical solution, a sealing sleeve is installed at the lower opening of the internal thread hole. The sealing sleeve is used to improve the sealing condition of the internal thread hole, prevent dust from entering inside, and ensure stable internal operation.

[0015] As a supplement to this technical solution, a circle of ejector pin holes surrounding the heat sink forming insert is provided on the outer ring of the cavity structure. An ejector pin plate that moves up and down is provided below the lower mold base. A bottom plate is installed below the ejector pin plate, and a number of ejector pin structures corresponding to the ejector pin holes are installed on the ejector pin plate. By installing the ejector pin plate, the ejector pin structure can be pushed to facilitate the demolding operation.

[0016] As a supplement to this technical solution, a number of oil injection ports corresponding one-to-one to the internal thread holes are provided on the front side and the rear side of the heat sink forming insert. A number of oil injection port docking ports corresponding one-to-one to the oil injection ports are provided on the front side and the rear side of the lower mold base. By providing the oil injection ports and the oil injection port docking ports, it is convenient to dock the oil injection pipeline with the internal thread hole, and it is convenient for the heat preservation oil to enter the internal thread hole to protect the thread.

[0017] As a supplement to this technical solution, the combined shape of two docked side forming grooves is the same as that of the middle forming groove.

[0018] Beneficial effects: The present invention relates to an integrated heat sink forming structure for a die-casting mold. By providing a number of sheet-like bodies, it is convenient for workers to assemble the heat sink forming insert. At the same time, by providing an internal thread hole and a threaded lead screw at the lower end of the sheet-like body, it is convenient for the heat dissipation structure and the sheet-like body to be preliminarily pre-ejected, greatly reducing the clamping force between the heat dissipation structure and the heat sink forming insert, facilitating product demolding, reducing the number of ejector pins used at the same time, and facilitating maintenance by workers. It has the characteristics of simple structure, low assembly difficulty, convenient maintenance by workers, and convenient product demolding. Description of the Drawings

[0019] Figure 1 is the top view of the present invention;

[0020] Figure 2 is the present invention Figure 1 Cross-sectional view taken along the A-A direction in;

[0021] Figure 3 is the present invention Figure 2 Partial enlarged view at A in;

[0022] Figure 4It is the present invention Figure 2 The partial enlarged view at position B in the present invention;

[0023] Figure 5 It is the front view of the heat sink forming insert described in the present invention;

[0024] Figure 6 It is the left view of the heat sink forming insert described in the present invention;

[0025] Figure 7 It is the top view of the heat sink forming insert described in the present invention;

[0026] Figure 8 It is the schematic diagram of the operating state when the heat sink forming insert described in the present invention operates as a whole;

[0027] Figure 9 It is the schematic diagram of the driving rack structure when only one section of teeth remains on the driving rack described in the present invention;

[0028] Figure 10 It is the present invention Figure 9 The partial enlarged view at position C in the present invention;

[0029] Figure 11 It is the schematic diagram of the operating state of the heat sink forming insert when only one section of teeth remains on the selected driving rack described in the present invention;

[0030] Figure 12 It is the structural view of the guiding groove described in the present invention;

[0031] Figure 13 It is the structural view of the oil injection port docking port described in the present invention.

[0032] Illustration: 1. Lower die base, 2. Lower die core, 3. Cavity structure, 4. Heat sink forming insert, 5. Thimble hole, 6. Flaky body, 7. Middle forming groove, 8. Side forming groove, 9. Threaded lead screw, 10. Driving gear, 11. Stable table, 12. Driving oil cylinder, 13. Driving rack, 14. Internal threaded hole, 15. Sealing sleeve, 16. Limiting cylindrical boss, 17. Guiding convex block, 18. Oil injection port, 19. Guiding groove, 20. Die foot structure, 21. Thimble plate, 22. Bottom plate, 23. Oil injection port docking port, 24. Stable bearing. Specific embodiments

[0033] The following further elaborates the present invention in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0034] Embodiments of the present invention relate to an integrated heat sink forming structure for a die-casting mold, as Figure 1 shown in FIG. 7, which includes a lower die base 1, a lower die core 2 and a cavity structure 3. The lower die core 2 is embedded and installed in the middle of the upper end face of the lower die base 1. The middle of the upper end face of the lower die core 2 is provided with a concave cavity structure 3. A heat sink forming insert 4 with its lower end passing through the lower die core 2 and the lower die base 1 is embedded and installed in the middle of the cavity structure 3. The heat sink forming insert 4 includes a sheet body 6, a middle forming groove 7 and a side forming groove 8. There are several sheet bodies 6 arranged vertically and side by side in a fitting manner. At least one middle forming groove 7 is provided in the middle of the upper end face of each sheet body 6. A side forming groove 8 is provided between adjacent sheet bodies 6. An internal threaded hole 14 is provided inside the lower end of the sheet body 6. A threaded screw rod 9 is vertically installed on the internal threaded hole 14. Transversely arranged driving gears 10 are provided at the lower ends of the threaded screw rods 9. A driving rack 13 meshing with the driving gears 10 is provided at the rear side of the driving gears 10. The driving rack 13 drives all the driving gears 10 to rotate completely or gradually. The driving rack 13 drives the threaded screw rods 9 to rotate. The threaded screw rods 9 drive the sheet bodies 6 to move up and down through the internal threaded holes 14.

[0035] In this technical solution, by providing a plurality of sheet bodies 6, it is convenient for workers to assemble the heat sink forming insert 4. At the same time, by providing an internal threaded hole 14 and a threaded screw rod 9 at the lower end of the sheet body 6, it is convenient for the heat dissipation structure and the sheet body 6 to be preliminarily pre-removed, greatly reducing the clamping force between the heat dissipation structure and the heat sink forming insert 4, facilitating product demolding, and at the same time reducing the number of ejector pins used, which is convenient for workers to maintain.

[0036] As a supplement to this technical solution, guiding convex blocks 17 are provided on the front and rear sides of the sheet body 6. Guiding grooves 19 matching the guiding convex blocks 17 are provided at the positions where the lower die base 1 and the lower die core 2 install the heat sink forming insert 4. In this technical solution, by providing the guiding convex blocks 17 and the guiding grooves 19, it is convenient for the sheet body 6 to move up and down stably. At the same time, the upper side of the guiding convex block 17 and the limit position at the upper end of the guiding groove 19 can limit the sheet body 6, which is convenient for guiding workers to install.

[0037] When installing this device, workers first need to calculate the protruding length of the threaded screw rod 9, and then rotate the threaded screw rod 9 to make the protruding length of the threaded screw rod 9 consistent with the length calculated in advance. After completion, the sheet body 6 is loaded from the installation opening of the lower die base 1, and the guiding convex blocks 17 match the guiding grooves 19. At the same time, ensure that the sheet bodies 6 are inserted into the lower die core 2 one by one.

[0038] As a supplement to this technical solution, a die foot structure 20 is installed on the lower end surface of the lower die base 1. A driving oil cylinder 12 is horizontally installed in the die foot structure 20, and the main shaft of the driving oil cylinder 12 is connected to a driving rack 13.

[0039] In this technical solution, the driving rack 13 is controlled by the driving oil cylinder 12 to move horizontally. The driving rack 13 is used to drive a driving gear 10, and the driving gear 10 controls the rotation of a threaded lead screw 9. The rotation of the threaded lead screw 9 drives a sheet body 6 to move up and down.

[0040] As a supplement to this technical solution, the driving rack 13 and the threaded lead screw 9 are integrally formed. In order to ensure the structural strength between the driving rack 13 and the threaded lead screw 9, an integrally formed part is selected, which can ensure the overall structural strength.

[0041] As a supplement to this technical solution, a stabilizing platform 11 is provided below the heat sink forming insert 4. A limiting cylindrical boss 16 that fits into the stabilizing platform 11 is provided on the lower end surface of the driving gear 10. By providing the stabilizing platform 11, the operation of the driving gear 10 can be effectively stabilized, ensuring that there is no jamming during operation.

[0042] A part of the lower side of the driving rack 13 is embedded in the stabilizing platform 11 to ensure that the driving rack 13 runs more stably and smoothly horizontally.

[0043] As a supplement to this technical solution, a stabilizing bearing 24 is sleeved on the limiting cylindrical boss 16, and the stabilizing bearing 24 is embedded in the stabilizing platform 11. By installing the stabilizing bearing 24, the stable operation of the threaded lead screw 9 can be guaranteed.

[0044] As a supplement to this technical solution, a sealing sleeve 15 is installed at the lower opening of the internal thread hole 14. The sealing sleeve 15 is used to improve the sealing condition of the internal thread hole 14, prevent dust from entering inside, and ensure stable internal operation.

[0045] As a supplement to this technical solution, a circle of ejector pin holes 5 surrounding the heat sink forming insert 4 is provided on the outer circle of the cavity structure 3. An ejector pin plate 21 that moves up and down is provided below the lower die base 1. A bottom plate 22 is installed below the ejector pin plate 21, and a number of ejector pin structures corresponding to the ejector pin holes 5 are installed on the ejector pin plate 21. By installing the ejector pin plate 21, the ejector pin structures are pushed, facilitating the demolding operation.

[0046] As a supplement to this technical solution, a number of oil injection ports 18 corresponding one-to-one to the internal threaded holes 14 are provided on the front side and the rear side of the heat sink forming insert 4, and a number of oil injection port docking ports 23 corresponding one-to-one to the oil injection ports 18 are provided on the front side and the rear side of the lower die base 1. By providing the oil injection ports 18 and the oil injection port docking ports 23, it is convenient to dock the oil injection pipeline with the internal threaded holes 14, and it is convenient for the heat preservation oil to enter the internal threaded holes 14 to protect the threads.

[0047] As a supplement to this technical solution, the combined shape of the two docked side forming grooves 8 is the same as that of the middle forming groove 7. Embodiment

[0048] When using this technical solution for demolding, at this time the product has been formed and cooled in the mold. Then, the entire mold is opened, and at the same time each core-pulling has completed the separation action. Then, the driving oil cylinder 12 is started, and the main shaft of the driving oil cylinder 12 controls the driving rack 13 to perform an extending action. The driving rack 13 drives the driving gear 10 to rotate through the teeth on it. The rotation of the driving gear 10 drives the threaded lead screw 9, and the threaded lead screw 9 makes the sheet body 6 move downward through the external thread and the internal threaded hole 14. At this time, the sheet body 6 is demolded from the product, so that the clamping force between the heat dissipation structure and the heat sink forming insert 4 is opened. Finally, as Figure 12 shown, the product is completely ejected from the cavity structure 3 through the ejector plate 21 and the ejector structure. After completion, the driving oil cylinder 12 is reset, and after closing the mold again, the next production is carried out.

[0049] The advantages of this technical solution are that a large number of original ejector pins are omitted, avoiding the cumbersome replacement work when the ejector pins are damaged, greatly reducing the maintenance difficulty and maintenance cost, and at the same time facilitating quick demolding and realizing quick ejection of the product. Embodiment

[0050] During the actual production process, the driving rack 13 has two states. One of them is as Figure 8 shown, which is mainly applied to the production of small cylinder blocks and when there is only one middle forming groove 7 in the sheet body 6. Both sides of the driving rack 13 meshing with the driving gear 10 have tooth structures. When the driving rack 13 runs, it drives all the driving gears 10 to rotate, so that all the sheet bodies 6 move up or down. This method can greatly improve the demolding efficiency.

[0051] Another state is as Figures 9 - 11As shown, there is only one section of tooth structure on the driving rack 13. When the driving rack 13 operates, this section of tooth structure can only drive one sheet-like body 6, so that when the driving rack 13 operates, the sheet-like body 6 can move up or down one by one. This method is applicable to die-casting molds for producing large cylinder blocks. By independently moving the sheet-like body 6, the resistance borne by the driving rack 13 and the driving gear 10 is greatly reduced, ensuring an increased service life of the driving rack 13 and the driving gear 10. Embodiment

[0052] During the actual use of this device, the working environment of the die-casting mold needs to be considered. The die-casting mold produces in a high-pressure and high-temperature environment. Therefore, in order to prevent the rapid aging of the thread structure in the internal thread hole 14, it is necessary to inject heat-preserving oil into the internal thread hole 14 to avoid the influence of high temperature on the internal thread hole 14. As Figure 13 shown, the oil injection port 18 on the front side of the heat sink forming insert 4 is the inlet, and the rear side is the outlet. During the die-casting process, heat-preserving oil is continuously input through the inlet and the outlet, so that the temperature of the internal thread hole 14 is always maintained at about two hundred degrees Celsius, avoiding damage to the internal thread due to high temperature and improving the service life of this part.

Claims

1. An integrated heat sink molding structure for a die-casting mold, comprising a lower mold base (1), a lower mold core (2) and a mold cavity structure (3), wherein the lower mold base (1) is embedded with the lower mold core (2) in the middle of the upper end surface, and the lower mold core (2) is provided with an inwardly concave mold cavity structure (3) in the middle of the upper end surface, characterized in that: The mold cavity structure (3) has a heat sink molding insert (4) embedded in the middle of the mold cavity structure (3), the lower end of which passes through the lower mold core (2) and the lower mold base (1). The heat sink molding insert (4) includes a sheet body (6), a middle molding groove (7) and a side molding groove (8). The sheet body (6) has a total of several sheets arranged vertically side by side. Each sheet body (6) has at least one middle molding groove (7) in the middle of the upper end surface, and side molding grooves (8) are provided between adjacent sheet bodies (6). The lower end of the sheet body (6) is provided with an inner screw. The inner threaded hole (14) is vertically mounted with a threaded screw (9), the lower end of each threaded screw (9) is provided with a transversely arranged driving gear (10), the rear side of each driving gear (10) is provided with a driving rack (13) meshing with the driving gear (10), the driving rack (13) drives all driving gears (10) to rotate completely or gradually, the driving rack (13) drives the threaded screw (9) to rotate, and the threaded screw (9) drives the sheet body (6) to move up and down through the inner threaded hole (14).

2. The integrated heat sink forming structure for a die-casting mold according to claim 1, characterized in that: The front and rear sides of the sheet-like body (6) are both provided with guide protrusions (17), and the lower mold base (1) and the lower mold core (2) are provided with guide grooves (19) matching the guide protrusions (17) at the positions where the heat sink molding insert (4) is installed.

3. The integrated heat sink forming structure for a die-casting mold according to claim 1, characterized in that: A die foot structure (20) is installed on the lower end surface of the lower die base (1), a driving cylinder (12) is installed transversely in the die foot structure (20), and a main shaft of the driving cylinder (12) is connected to a driving rack (13).

4. The integrated heat sink forming structure for a die-casting mold according to claim 3, characterized in that: The driving rack (13) and the threaded screw (9) are integrally formed.

5. The integrated heat sink forming structure for a die-casting mold according to claim 3, characterized in that: A stabilizing platform (11) is provided below the heat sink molding insert (4), and a limiting cylindrical boss (16) embedded in the stabilizing platform (11) is provided on the lower end surface of the driving gear (10).

6. The integrated heat sink forming structure for a die-casting mold according to claim 5, characterized in that: A stabilizing bearing (24) is sleeved and mounted on the limiting cylindrical boss (16), and the stabilizing bearing (24) is embedded and mounted on the stabilizing platform (11).

7. The integrated heat sink forming structure for a die-casting mold according to claim 1, characterized in that: A sealing sleeve (15) is installed on the lower opening of the internal threaded hole (14).

8. The integrated heat sink forming structure for a die-casting mold according to claim 1, characterized in that: The outer ring of the mold cavity structure (3) is provided with a circle of ejector holes (5) surrounding the heat sink molding insert (4); an ejector plate (21) that moves up and down is provided below the lower mold base (1); a bottom plate (22) is installed below the ejector plate (21); and a plurality of ejector structures corresponding to the ejector holes (5) are installed on the ejector plate (21).

9. The integrated heat sink forming structure for a die-casting mold according to claim 1, characterized in that: The front and rear sides of the heat sink molding insert (4) are both provided with a plurality of oil filling ports (18) corresponding one-to-one to the internal threaded holes (14), and the front and rear sides of the lower mold base (1) are both provided with a plurality of oil filling port docking ports (23) corresponding one-to-one to the oil filling ports (18).

10. The integrated heat sink forming structure for a die-casting mold according to claim 1, characterized in that: The combined shape of the two butted side forming grooves (8) is the same as that of the middle forming groove (7).

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