Anti-flash structure for hub low-pressure casting mold

Abstract

The utility model discloses an anti-flash structure for a hub low-pressure casting die, which comprises a side die body, an inclined surface is arranged on a parting surface of the side die body, a groove is arranged on the inclined surface, a flexible graphite packing is embedded in the groove, a bolt is arranged in the groove, and the flexible graphite packing is arranged on the inclined surface of the side die body. And the flexible graphite packing is fixed on the side die body through a bolt. Compared with the prior art, the flexible dynamic sealing structure has the advantages that the inclined surface with the groove is arranged, the flexible graphite packing is embedded, and a countersunk bolt fixing structure is matched, so that the flexible dynamic sealing of the parting surface of the die is realized, the gap of the die is compensated, the leakage of molten aluminum is prevented, and the generation of flashes is reduced; the packing material woven by the flexible graphite composite coiled material is adopted, so that the sealing performance is stable in a high-temperature environment, the self-adaptive mold thermal expansion and cold contraction are realized, and the service lives of the mold and a sealing assembly are prolonged; the positioning groove is formed in the edge of the parting surface, so that precise assembly calibration of the side die and the adjacent die is achieved, assembly errors are eliminated, and the reliability of the sealing structure is improved.

Description

Technical Field

[0001] This utility model relates to the field of die-casting mold technology, and in particular to an anti-flash structure for low-pressure casting molds for wheel hubs. Background Technology

[0002] In the low-pressure casting process of aluminum alloy wheels, the mold structure directly affects the casting quality and production efficiency. Common molds typically consist of a moving mold, a fixed mold, and four side molds. The sealing of the parting surface and the structural design are crucial for ensuring casting accuracy. However, in actual production, the reliability and sealing of the molds face numerous challenges, necessitating structural optimization to improve process stability.

[0003] In the existing technology, low-pressure casting molds for wheel hubs have obvious technical defects: the gap between the mold parting surface, the sliding part of the slider, the gap between the inserts and other locations are prone to leakage of molten metal, forming flash; insufficient clamping force, uneven mold stress or poor venting can also aggravate the formation of flash, which has certain shortcomings. To address these issues, we propose an anti-flash structure for low-pressure casting molds for wheel hubs. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an anti-flash structure for low-pressure casting molds of wheel hubs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An anti-flash structure for a low-pressure casting mold for wheel hubs includes a side mold body. The parting surface of the side mold body is provided with an inclined surface, and a groove is provided on the inclined surface. A flexible graphite packing is embedded in the groove, and a bolt is installed inside the groove. The flexible graphite packing is fixed to the side mold body by the bolt. The edge of the parting surface of the side mold body is provided with a positioning groove, and the positioning groove cooperates with the positioning boss of the adjacent mold.

[0007] Preferably, the angle between the inclined surface and the side surface of the mold body is forty-five degrees.

[0008] Preferably, the groove is continuously formed along the inclined surface of the mold body, and the width of the groove is adapted to the cross-sectional width of the flexible graphite packing.

[0009] Preferably, the flexible graphite packing is woven from flexible graphite composite roll material, and the thickness of the flexible graphite packing is customized according to the parting surface gap of the mold.

[0010] Preferably, the bolt is a countersunk bolt, and the side mold body has threaded holes on both sides of the groove. The countersunk bolt passes through the flexible graphite packing and is then fastened to the threaded holes.

[0011] Preferably, the positioning groove is a rectangular groove, and the positioning groove is used to calibrate the assembly position of the side mold body and the mold.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention achieves flexible dynamic sealing of the mold parting surface by setting a grooved inclined surface with embedded flexible graphite packing and using a countersunk bolt fixing structure. This compensates for mold gaps, prevents aluminum liquid leakage, and reduces flash. The packing material, woven from flexible graphite composite rolls, ensures stable sealing performance under high-temperature environments, adapts to mold thermal expansion and contraction, and extends the service life of the mold and sealing components. By setting positioning grooves at the edge of the parting surface, precise assembly calibration between the side mold and adjacent molds is achieved, eliminating assembly errors and improving the reliability of the sealing structure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of an anti-flash structure for a low-pressure casting mold for wheel hubs proposed in this utility model;

[0015] Figure 2 for Figure 1 Rear view.

[0016] In the diagram: 1. Side mold body, 2. Inclined surface, 3. Groove, 4. Flexible graphite packing, 5. Bolt, 6. Positioning groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figure 1-2 An anti-flash structure for a low-pressure casting mold for wheel hubs includes a side mold body 1, whose parting surface has an inclined surface 2 at a 45-degree angle to the side surface. Grooves 3 are continuously formed on the inclined surface 2. The width of the grooves is adapted to the cross-sectional width of the flexible graphite packing 4. The packing is made of flexible graphite composite roll woven material, and its thickness is customized according to the gap of the mold parting surface and then embedded in the groove 3. The flexible graphite packing 4 is fixed by passing countersunk bolts 5 through the packing and fastening it to the threaded holes on both sides of the groove 3 of the side mold body 1. A rectangular positioning groove 6 is set on the edge of the parting surface of the side mold body 1, which cooperates with the positioning boss of the adjacent mold to calibrate the assembly position of the side mold with the moving mold and the fixed mold. This structure forms a dynamic sealing system through the sealing cooperation of the inclined surface groove and the flexible graphite packing, the bolt fixing structure and the precise calibration of the positioning groove, which effectively compensates for the mold gap, prevents aluminum liquid leakage and reduces flash generation.

[0019] When performing low-pressure casting of wheel hubs, the side mold body 1, through the positioning groove 6 on the edge of the parting surface, cooperates with the positioning boss of the adjacent mold to achieve precise assembly calibration, ensuring the accurate relative position between the side mold and the moving and fixed molds, reducing uneven gaps caused by assembly errors. After mold closing, the flexible graphite packing 4 embedded in the groove 3 at the inclined surface 2 is fixed by bolts 5 to form a sealing structure. During the casting process, the mold expands and contracts due to heat. The flexible graphite packing 4 automatically compresses and deforms due to its flexibility, filling the gaps caused by thermal deformation of the parting surface, forming a continuous sealing surface, preventing molten aluminum from leaking to the outside of the parting surface, thereby effectively reducing the generation of flash. This structure, through the precise positioning of the positioning groove 6, the cooperation between the groove 3 and the flexible graphite packing 4, and the fixing of the bolts 5, achieves dynamic compensation and sealing of the gaps in the mold parting surface, ensuring the stability of the low-pressure casting process of wheel hubs and improving the quality of the castings.

[0020] In summary, compared with existing technologies, this utility model achieves flexible dynamic sealing of the mold parting surface by setting a grooved inclined surface and embedding flexible graphite packing, combined with a countersunk bolt fixing structure. This compensates for mold gaps, prevents aluminum liquid leakage, and reduces flash. The packing material woven from flexible graphite composite rolls ensures stable sealing performance under high-temperature environments, adapts to mold thermal expansion and contraction, and extends the service life of the mold and sealing components. By setting positioning grooves at the edge of the parting surface, precise assembly calibration between the side mold and adjacent molds is achieved, eliminating assembly errors and improving the reliability of the sealing structure.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An anti-flash structure for a low-pressure casting mold for wheel hubs, comprising a side mold body (1), characterized in that: The parting surface of the side mold body (1) is provided with an inclined surface (2), and a groove (3) is provided on the inclined surface (2). A flexible graphite packing (4) is embedded in the groove (3). A bolt (5) is installed inside the groove (3). The flexible graphite packing (4) is fixed to the side mold body (1) by the bolt (5). The edge of the parting surface of the side mold body (1) is provided with a positioning groove (6). The positioning groove (6) cooperates with the positioning boss of the adjacent mold.

2. The anti-flash structure for a low-pressure casting mold for wheel hubs according to claim 1, characterized in that, The angle between the inclined surface (2) and the side surface of the mold body (1) is forty-five degrees.

3. The anti-flash structure for a low-pressure casting mold for wheel hubs according to claim 1, characterized in that, The groove (3) is continuously opened along the inclined surface (2) of the side mold body (1), and the width of the groove (3) is adapted to the cross-sectional width of the flexible graphite packing (4).

4. The anti-flash structure for a low-pressure casting mold for wheel hubs according to claim 1, characterized in that, The flexible graphite packing (4) is woven from flexible graphite composite roll material, and the thickness of the flexible graphite packing (4) is customized according to the gap of the mold parting surface.

5. The anti-flash structure for a low-pressure casting mold for wheel hubs according to claim 1, characterized in that, The bolt (5) is a countersunk bolt. The side mold body (1) has threaded holes on both sides of the groove (3). The countersunk bolt (5) passes through the flexible graphite packing (4) and is then fastened to the threaded holes.

6. The anti-flash structure for a low-pressure casting mold for wheel hubs according to claim 1, characterized in that, The positioning groove (6) is a rectangular groove, and the positioning groove (6) is used to calibrate the assembly position of the side mold body (1) and the mold.

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