A die-casting mold for high-strength piston of automobile air pump

Abstract

The utility model relates to a die-casting mold for a high-strength piston of an automobile air pump, comprising an upper mold, a lower mold and a mold foot structure, wherein the lower end surface of the upper mold is provided with a lower mold, the lower end of the lower mold is provided with a mold foot structure, an upper mold core and a lower mold core stacked up and down are provided between the upper mold and the lower mold, two mold cavity structures are formed between the upper mold core and the lower mold core, an upper insert connected to the upper mold core is provided on the upper side of the mold cavity structure, a lower insert connected to the lower mold core is provided below the upper insert, a circle of annular cooling grooves are provided at the lower end of the lower insert, a central sleeve connected to the lower mold core is provided in the middle of the annular cooling groove, the upper end of the central sleeve passes through the lower insert, a central ejector is provided in the central sleeve, an inner concave structure is provided in the middle of the upper end of the lower insert, the upper end of the central ejector adopts a cone structure with a small upper portion and a large lower portion, and the cone structure protrudes out of the upper end of the central sleeve. The utility model has the characteristics of improving cooling efficiency, ensuring product quality, and avoiding the generation of shrinkage holes.

Description

Technical Field

[0001] The utility model relates to the technical field of piston die-casting dies, in particular to a die-casting die for a high-strength piston of an automobile air pump. Background Art

[0002] In the process of producing pistons with conventional die-casting molds, the accumulated heat inside the piston cannot be discharged quickly due to the large thickness of the piston structure, resulting in shrinkage holes inside the piston, which makes the piston unable to be used in high-intensity working environments. In order to improve the cooling effect and ensure the quality of the piston, the mold needs to be improved. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a die-casting mold for a high-strength piston of an automobile air pump, which has the characteristics of improving cooling efficiency, ensuring product quality, avoiding the generation of shrinkage holes, and the like.

[0004] The utility model solves the technical problem by adopting the following technical scheme: providing a die-casting mold for a high-strength piston of an automobile air pump, comprising an upper mold, a lower mold and a mold foot structure, wherein the lower end surface of the upper mold is provided with a lower mold, the lower end of the lower mold is provided with a mold foot structure, an upper mold core and a lower mold core stacked up and down are provided between the upper mold and the lower mold, two mold cavity structures are formed between the upper mold core and the lower mold core, an upper insert connected to the upper mold core is provided on the upper side of the mold cavity structure, a lower insert connected to the lower mold core is provided below the upper insert, a circle of annular cooling grooves are provided at the lower end of the lower insert, a center sleeve connected to the lower mold core is provided in the middle of the annular cooling groove, the upper end of the center sleeve passes through the lower insert, a center ejector pin is provided in the center sleeve, an inner concave structure is provided in the middle of the upper end of the lower insert, the upper end of the center ejector pin adopts a cone structure with a small upper portion and a large lower portion, and the cone structure protrudes out of the upper end of the center sleeve.

[0005] In the technical solution, independent upper and lower inserts are provided to facilitate the arrangement of the cooling structure, and the cavity structure is cooled separately and centrally, so that during the production process, the cooling of the mold is diffused from the cavity structure to the outside, thereby ensuring the quality of the product, avoiding heat accumulation inside the product, and avoiding the appearance of shrinkage holes. At the same time, a central sleeve is provided to ensure the installation of the middle ejector pin, and the ejection of the product is facilitated by the middle ejector pin. At the same time, an annular cooling groove is provided to facilitate the cooling of the lower insert.

[0006] As a supplement to the present technical solution, two exhaust block assemblies are installed side by side in the front of the upper mold and the lower mold, a slag bag structure surrounding the mold cavity structure is arranged on the front side of the mold cavity structure, and the front side of the slag bag structure is connected to the two exhaust block assemblies.

[0007] In this technical solution, a slag bag structure is provided to ensure that the magic gun structure can be exhausted quickly to avoid the air rolling phenomenon.

[0008] As a supplement to the technical solution, a gate structure is installed in the middle position of the rear part of the upper mold, and a runner structure that connects with the two cavity structures is arranged on the front side of the lower end of the gate structure.

[0009] As a supplement to the present technical solution, a pipe installation groove is provided in the middle of the upper end surface of the upper mold and runs through both sides of the upper mold. The pipe installation groove is provided with two circular grooves corresponding to the two mold cavity structures. Three cooling pipes are installed around the center of the circle on the circular groove, and the lower end of the cooling pipe is inserted into the upper insert.

[0010] In this technical solution, pipeline installation grooves are provided to facilitate the introduction of cooling pipelines, and cooling pipelines are centrally arranged to facilitate maintenance by workers. At the same time, three cooling pipes are provided around the center of the circle to achieve centralized spot cooling of the upper insert.

[0011] Beneficial effects: The utility model relates to a die-casting mold for a high-strength piston of an automobile air pump. Independent upper and lower inserts are provided to facilitate the arrangement of a cooling structure, and the cavity structure is cooled separately and centrally, so that during the production process, the cooling of the mold is diffused outward from the cavity structure, thereby ensuring the quality of the product, avoiding heat accumulation inside the product, and avoiding the formation of shrinkage holes. At the same time, a central sleeve is provided to ensure the installation of a middle ejector pin, and the ejection of the product is facilitated by the middle ejector pin. At the same time, an annular cooling groove is provided to facilitate cooling of the lower insert, and the utility model has the characteristics of improving cooling efficiency, ensuring product quality, and avoiding the formation of shrinkage holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view of the utility model;

[0013] Figure 2 It is a top view of the utility model;

[0014] Figure 3 This is a structural view of the utility model after removing the upper mold;

[0015] Figure 4 It is a structural view of the upper insert and the lower insert described in the utility model;

[0016] Figure 5 This utility model Figure 4 Section view in the AA direction;

[0017] Figure 6 This utility model Figure 5 A partial enlarged view of point A in the middle.

[0018] Illustration: 1. Upper mold, 2. Lower mold, 3. Mold foot structure, 4. Exhaust block assembly, 5. Mold cavity structure, 6. Gate structure, 7. Pipe mounting groove, 8. Circular groove, 9. Cooling pipe, 10. Upper insert, 11. Lower insert, 12. Center sleeve, 13. Middle ejector pin, 14. Annular cooling groove, 15. Concave structure, 16. Slag bag structure. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used 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 claims attached to this application.

[0020] The embodiment of the utility model relates to a die-casting mold for a high-strength piston of an automobile air pump, such as Figure 1 As shown in FIG. 6 , the mold comprises an upper mold 1, a lower mold 2 and a mold foot structure 3. The lower mold 2 is installed on the lower end surface of the upper mold 1, and the mold foot structure 3 is installed on the lower end of the lower mold 2. An upper mold core and a lower mold core stacked up and down are installed between the upper mold 1 and the lower mold 2. Two mold cavity structures 5 are formed between the upper mold core and the lower mold core. An upper insert 10 connected to the upper mold core is installed on the upper side of the mold cavity structure 5, and a lower insert 1 docking with the lower mold core is installed below the upper insert 10. 1. The lower end of the lower insert 11 is provided with a circle of annular cooling grooves 14, a center sleeve 12 connected to the lower mold core is installed in the middle of the annular cooling groove 14, the upper end of the center sleeve 12 passes through the lower insert 11, a middle ejector pin 13 is installed in the center sleeve 12, and an inner concave structure 15 is provided in the middle of the upper end of the lower insert 11. The upper end of the middle ejector pin 13 adopts a frustum structure with a small upper part and a large lower part, and the frustum structure protrudes out of the upper end of the center sleeve 12.

[0021] In the technical solution, independent upper inserts 10 and lower inserts 11 are provided to facilitate the arrangement of the cooling structure, and the cavity structure 5 is cooled separately and centrally, so that during the production process, the cooling of the mold is diffused outward from the cavity structure 5, thereby ensuring the quality of the product, avoiding heat accumulation inside the product, and avoiding the appearance of shrinkage holes. At the same time, the central sleeve 12 is provided to ensure the installation of the middle ejector pin 13, and the middle ejector pin 13 facilitates the ejection of the product. At the same time, the annular cooling groove 14 is provided to facilitate the cooling of the lower insert 11.

[0022] As a supplement to the present technical solution, two exhaust block assemblies 4 are installed side by side in the front of the upper mold 1 and the lower mold 2, and a slag bag structure 16 surrounding the mold cavity structure 5 is provided on the front side of the mold cavity structure 5, and the front side of the slag bag structure 16 is connected to the two exhaust block assemblies 4.

[0023] In the technical solution, the slag bag structure 16 is provided to ensure that the magic gun structure 5 can be exhausted quickly to avoid the air rolling phenomenon.

[0024] As a supplement to the present technical solution, a gate structure 6 is installed in the middle position of the rear portion of the upper mold 1 , and a runner structure that interfaces with the two cavity structures 5 is provided at the front side of the lower end of the gate structure 6 .

[0025] As a supplement to the present technical solution, a pipe mounting groove 7 is provided in the middle of the upper end surface of the upper mold 1 and runs through both sides of the upper mold 1. The pipe mounting groove 7 is provided with two circular grooves 8 corresponding to the two cavity structures 5. Three cooling pipes 9 are installed around the center of the circle on the circular groove 8, and the lower end of the cooling pipe 9 is inserted into the upper insert 10.

[0026] In this technical solution, by setting the pipeline installation groove 7, it is convenient to introduce the cooling pipeline, and the cooling pipeline is centrally arranged to facilitate maintenance by workers. At the same time, by setting three cooling pipes 9 around the center of the circle, centralized spot cooling of the upper insert 10 is achieved.

[0027] Example

[0028] When production is carried out, the mold is first closed. After completion, the die-casting machine injects molten aluminum into the gate structure 6, and then injects the molten aluminum into the two cavity structures 5 through the gate structure 6 and the runner structure. The molten aluminum discharges the air in the cavity structure 5 from the slag bag structure 16 and the exhaust block assembly 4. When the molten aluminum fills the entire cavity structure 5, cooling continues. The cooling pipe injects the coolant into the upper insert 10 and the lower insert 11 to centrally cool the product. When cooling rapidly, the cooling temperature of the mold diffuses outward from the product position, so that the accumulated heat of the product can be quickly discharged. After the mold is cooled, the mold is opened, and finally the product is ejected from the cavity structure 5 through the ejector plate. Since the starting position of cooling is at the cavity structure 5, the accumulated heat inside the product can be quickly discharged, ensuring that no shrinkage holes are generated inside the product, thereby ensuring product quality.

[0029] The above is a detailed introduction to a die-casting mold for a high-strength piston of an automobile air pump provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technicians in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A die-casting mold for a high-strength piston of an automobile air pump, comprising an upper mold (1), a lower mold (2) and a mold foot structure (3), wherein the lower end surface of the upper mold (1) is provided with the lower mold (2), the lower end of the lower mold (2) is provided with the mold foot structure (3), an upper mold core and a lower mold core stacked up and down are provided between the upper mold (1) and the lower mold (2), and two mold cavity structures (5) are formed between the upper mold core and the lower mold core, characterized in that: An upper insert (10) connected to the upper mold core is installed on the upper side of the mold cavity structure (5), and a lower insert (11) connected to the lower mold core is installed below the upper insert (10). A circle of annular cooling grooves (14) are arranged at the lower end of the lower insert (11), and a center sleeve (12) connected to the lower mold core is installed in the middle of the annular cooling groove (14). The upper end of the center sleeve (12) passes through the lower insert (11), and a center ejector pin (13) is installed in the center sleeve (12). An inner concave structure (15) is arranged in the middle of the upper end of the lower insert (11), and the upper end of the center ejector pin (13) adopts a cone structure with a small upper part and a large lower part, and the cone structure protrudes from the upper end of the center sleeve (12).

2. The die-casting mold for a high-strength piston of an automobile air pump according to claim 1, characterized in that: Two exhaust block assemblies (4) are installed side by side in the front of the upper mold (1) and the lower mold (2), and a slag bag structure (16) surrounding the mold cavity structure (5) is arranged on the front side of the mold cavity structure (5), and the front side of the slag bag structure (16) is connected to the two exhaust block assemblies (4).

3. The die-casting mold for a high-strength piston of an automobile air pump according to claim 1, characterized in that: A gate structure (6) is installed in the middle position of the rear part of the upper mold (1), and a flow channel structure that is connected to the two mold cavity structures (5) is arranged on the front side of the lower end of the gate structure (6).

4. The die-casting mold for a high-strength piston of an automobile air pump according to claim 1, characterized in that: A pipe installation groove (7) is provided in the middle of the upper end surface of the upper mold (1) and runs through both sides of the upper mold (1). The pipe installation groove (7) is provided with two circular grooves (8) corresponding to the two mold cavity structures (5). Three cooling pipes (9) are installed around the center of the circle on the circular groove (8), and the lower end of the cooling pipe (9) is inserted into the upper insert (10).

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