Water-cooling mold with built-in vapor chamber for low-pressure casting of aluminum alloy hub

Abstract

The utility model discloses a low-pressure casting aluminum alloy hub water-cooling mold with a built-in vapor chamber, which comprises an upper mold cover plate, a lower mold bottom plate and a side mold back plate, and the upper mold cover plate and the lower mold bottom plate are arranged at the upper end and the lower end of the side mold back plate in parallel. The upper mold cover plate, the lower mold bottom plate and the side mold back plate form an automobile hub cavity used for casting an automobile hub, the automobile hub casting mold further comprises an annular vapor chamber, the annular vapor chamber is arranged on the upper surface of the lower mold bottom plate, and the outer surface of the annular vapor chamber is covered with a copper film. According to the utility model, the effect of rapid heat transfer and soaking is realized by utilizing the soaking plate, the heat dissipation performance is better, and the copper film covered on the surface of the soaking plate has the advantages of strong heat conduction capability, good temperature balancing effect, strong structural adaptability and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum alloy wheel hub molds, in particular to a water-cooled mold for low-pressure casting of aluminum alloy wheel hubs with a built-in soaking plate. Background Art

[0002] A wheel hub, also known as a rim, is a cylindrical component that supports the tire and is centrally mounted on an axle. Common automotive wheels include steel and aluminum alloy. Steel and aluminum alloy wheels are two types: the former is used for trucks and standard cars, while the latter is generally used in high- and mid-range cars. As a key automotive component, the wheel hub plays a vital role in ensuring a smooth ride. With continued research into aluminum alloy wheels, they hold promising prospects for development. Aluminum alloy wheels offer significant advantages over steel. Aluminum has a specific gravity of only one-third that of iron, making it lightweight. Furthermore, aluminum is almost entirely recyclable and can be reused, benefiting the environment. While steel wheels offer advantages like low cost and durability, their disadvantages include a monotonous appearance, low heat dissipation, and high weight. Consequently, many car owners are switching to aluminum alloy wheels when refitting their tires. Aluminum alloy wheels are gradually replacing steel wheels due to their safety, reliability, attractive appearance, excellent balance, long tire life, light weight, excellent shock absorption, and rapid heat dissipation.

[0003] Automobile wheels are safety-critical components, so their internal quality requirements are extremely stringent. During the casting process, the spoke corner hot spots and the rear hanger have thick walls and corners, resulting in slow heat dissipation during solidification. Existing low-pressure casting molds for aluminum automotive wheels lack cooling systems at these hot spots and the rear hanger. By improving the heat dissipation efficiency at these hot spots, better cooling can be achieved during casting, extending the casting cycle and improving production efficiency.

[0004] Currently, the cooling method for low-pressure casting in the aluminum alloy wheel industry, both domestically and internationally, mostly relies on compressed air cooling, with a limited use of water cooling. While air-cooled molds have become increasingly common in recent years, their low thermal conductivity and limited cooling effectiveness hinder improvements in product performance and production efficiency. Furthermore, air cooling processes have the disadvantages of high compressor operation and maintenance costs and high noise levels during production.

[0005] The information disclosed in the above background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of implication that the information constitutes prior art already known to those skilled in the art. Utility Model Content

[0006] In view of the shortcomings and limitations of the above-mentioned air cooling process for aluminum alloy automobile wheels, as well as the slow heat dissipation at the spoke corners and rear hangers, the utility model provides a water-cooling mold for a low-pressure cast aluminum alloy wheel with a built-in heat sink.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A mold for low-pressure casting of an aluminum alloy wheel hub with a built-in heat spreader, comprising an upper mold cover plate, a lower mold base plate and a side mold back plate, wherein the upper mold cover plate and the lower mold base plate are arranged in parallel at the upper and lower ends of the side mold back plate, and the upper mold cover plate, the lower mold base plate and the side mold back plate constitute a hub cavity for casting the automobile wheel hub, and further comprising an annular heat spreader, which is arranged on the upper surface of the lower mold base plate, and the outer surface of the annular heat spreader is covered with a copper film, and a cooling pipe is also provided on the side mold back plate, connecting the connection between the rim and each spoke, and the water inlet and outlet of the cooling pipe are connected and led out by seamless pipe welding.

[0009] Furthermore, an upper mold through hole is provided at the lower portion of the upper mold cover plate, and the upper mold cover plate is fixedly connected to the side mold back plate by bolts through the upper mold through hole.

[0010] Furthermore, a lower mold through hole is provided on the upper portion of the lower mold base plate, and the lower mold base plate is fixedly connected to the side mold back plate by bolts through the lower mold through hole.

[0011] Furthermore, the number of the side form back plates is more than two, and the side walls of the side form back plates are provided with notches, and the side form back plates are fixed to each other by screws at the notches.

[0012] Furthermore, the annular heat spreader is in a convex ring shape, which is adapted to the outer shape of the wheel hub, so that the annular heat spreader can contact the wheel hub with the maximum area to achieve heat conduction and heat transfer.

[0013] Furthermore, the annular heat sink is fixedly connected to the bottom plate of the lower mold by bolts.

[0014] The beneficial effects of the utility model are:

[0015] A water-cooled mold for a low-pressure cast aluminum alloy wheel hub with a built-in heat spreader is provided. An annular heat spreader is arranged between the upper mold and the lower mold. When the wall thickness at the spoke corner hot node and the rear hanging is relatively thick and the presence of a corner leads to slow heat dissipation during the solidification process, the thermal conductivity of the copper film on the annular heat spreader is utilized to achieve rapid heat transfer and heat dissipation, thereby improving heat dissipation performance and reducing the manufacturing cost of the heat spreader. At the same time, a cooling pipe is provided at the connection between the rim and each spoke. The cooling efficiency of the water-cooling medium is higher than that of air cooling, thereby improving the cooling efficiency, replacing air with water for cooling, saving compressed air, and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 is a front cross-sectional view of an annular heat sink;

[0018] Figure 3 1 is a top view of the annular heat sink;

[0019] In the figure, 1-upper mold cover plate, 2-side mold back plate, 3-lower mold bottom plate, 4-inlaid water cooling pipe, 5-annular heat sink; 11-upper mold through hole; 31-lower mold through hole; 21-slot; 22-screw. DETAILED DESCRIPTION

[0020] To explain the technical content, objectives, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings. In the description of this embodiment, it should be understood that the terms indicating orientation or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this embodiment and simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0021] like Figure 1-3 As shown, a mold for low-pressure casting of aluminum alloy wheels with a built-in heat spreader includes an upper mold cover plate 1, a lower mold base plate 3 and a side mold back plate 2. The upper mold cover plate 1 and the lower mold base plate 3 are arranged parallel to the upper and lower ends of the side mold back plate 2. The upper mold cover plate 1, the lower mold base plate 3 and the side mold back plate 2 constitute a hub cavity for casting automobile wheels. It also includes an annular heat spreader 5, which is arranged on the upper surface of the lower mold base plate 3. The outer surface of the annular heat spreader 5 is covered with a copper film. By arranging a heat spreader between the upper mold and the lower mold, and utilizing the unique structure of the heat spreader outer surface covered with a copper film, the heat spreader can achieve rapid heat transfer and heat dissipation in the case where the wall thickness of the spoke corner hot node and the rear hanging is thick and the presence of a corner causes slow heat dissipation during solidification, so that it has better heat dissipation performance. A cooling pipe 4 is set on the side mold back plate to connect the rim and each spoke connection. The water inlet and outlet of the cooling pipe 4 are connected by seamless pipe welding. By setting up cooling pipes at the connection between the rim and each spoke, the cooling efficiency of water cooling medium is higher than that of air cooling, which improves the cooling efficiency. Water is used instead of air for cooling, saving compressed air production and reducing energy consumption.

[0022] As a preferred embodiment of the above embodiment, an upper mold through hole 11 is provided at the lower portion of the upper mold cover plate 1, and the upper mold cover plate 1 is fixed to the side mold back plate 2 with bolts through the upper mold through hole 11.

[0023] As a preferred embodiment of the above embodiment, a lower mold through hole 31 is provided on the upper portion of the lower mold base plate 3, and the lower mold base plate 3 is bolted and fixed to the side mold back plate 2 through the lower mold through hole 31.

[0024] As a preference in the above embodiment, the number of the side form back plates 2 is more than two, and the side walls of the side form back plates 2 are provided with notches 21 , and the side form back plates 2 are fixed to each other at the notches 21 by screws 22 .

[0025] As a preferred embodiment of the above, Figure 2-3 As shown, the annular heat spreader 5 is in a convex ring shape, which is adapted to the outer shape of the hub, so that the annular heat spreader 5 can contact the hub with the maximum area to achieve heat conduction and heat transfer.

[0026] As a preferred embodiment of the above embodiment, the annular heat sink 5 is fixedly connected to the lower mold base plate 3 by bolts.

[0027] The utility model arranges an annular heat spreader between the upper mold and the lower mold. When the wall thickness of the spoke corner hot node and the rear hanging is thick and the presence of the corner leads to slow heat dissipation during the solidification process, the thermal conductivity of the copper film on the annular heat spreader is utilized to achieve the effect of rapid heat transfer and heat equalization, so that it has better heat dissipation performance and reduces the manufacturing cost of the heat spreader. At the same time, a cooling pipe is provided at the connection between the rim and each spoke. The cooling efficiency of the water cooling medium is higher than that of the air cooling, which improves the cooling efficiency, uses water instead of air for cooling, saves compressed air production, and reduces energy consumption.

[0028] Although the present invention has been described in detail above using specific embodiments, it is readily apparent to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, any such modifications or improvements that do not depart from the spirit of the present invention are intended to fall within the scope of protection claimed herein.

Claims

1. A water-cooled die for low-pressure casting of aluminum alloy wheels with a built-in soaking plate, characterized by: It includes an upper mold cover plate, a lower mold bottom plate and a side mold back plate, and the upper mold cover plate and the lower mold bottom plate are arranged in parallel at the upper and lower ends of the side mold back plate. The upper mold cover plate, the lower mold bottom plate and the side mold back plate constitute a car hub cavity for casting the car hub, and also include an annular heat spreader, which is arranged on the upper surface of the lower mold bottom plate, and the outer surface of the annular heat spreader is covered with a copper film; a cooling pipe is also provided on the side mold back plate, connecting the connection between the rim and each spoke, and the water inlet and outlet of the cooling pipe are connected and led out through seamless pipe welding.

2. The water-cooled mold for low-pressure casting of an aluminum alloy wheel hub with a built-in soaking plate according to claim 1, characterized in that: An upper mold through hole is provided at the lower portion of the upper mold cover plate, and the upper mold cover plate is fixedly connected to the side mold back plate with bolts via the upper mold through hole.

3. The water-cooled mold for low-pressure casting of an aluminum alloy wheel hub with a built-in soaking plate according to claim 1, characterized in that: A lower mold through hole is provided on the upper portion of the lower mold base plate, and the lower mold base plate is fixedly connected to the side mold back plate with bolts via the lower mold through hole.

4. The water-cooled mold for low-pressure casting of an aluminum alloy wheel hub with a built-in soaking plate according to claim 1, characterized in that: The number of the side form back plates is more than two, and the side walls of the side form back plates are provided with notches, and the side form back plates are fixed to each other by screws at the notches.

5. The water-cooled mold for low-pressure casting of an aluminum alloy wheel hub with a built-in soaking plate according to claim 1, characterized in that: The annular heat spreader is in a convex ring shape and is adapted to the outer shape of the wheel hub.

6. The water-cooled mold for low-pressure casting of an aluminum alloy wheel hub with a built-in soaking plate according to claim 1, characterized in that: The annular heat soaking plate is fixedly connected to the lower mold bottom plate by bolts.

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