Mixed cooling low-pressure wheel hub mold

Abstract

The invention discloses a mixed cooling low-pressure wheel hub mold. The mixed cooling low-pressure wheel hub mold comprises an upper mold body, a lower mold body and side mold bodies, and the upper mold body, the lower mold body and the two side mold bodies can jointly form a casting mold for casting a wheel hub in an enclosing mode; a wheel rim water cooling mechanism is arranged in each side mold body, each wheel rim water cooling mechanism comprises a flow dividing pipe, an upper flow guiding pipe and a lower flow guiding pipe, and the upper flow guiding pipes and the lower flow guiding pipes communicate with the flow dividing pipes through three-way pipes; and a wheel spoke air cooling mechanism, a wheel spoke water cooling mechanism and a diaphragm medium are arranged in the lower mold body. According to the mixed cooling low-pressure wheel hub mold, the wheel hub mold is cooled by adopting a water cooling and air cooling mixed mode, the cooling speed is high, and the achieved chilling effect is better; and pipe arranging structures in the lower mold body and the side mold bodies are overall planned according to the thickness of all parts of the wheel hub, therefore, the cooling speed of all the parts of the wheel hub is more similar, the wheel hub can be overall molded, and the phenomena that the junctions of wheel spokes and a wheel rim have large shrinkage holes and wheel rim shrinkage defects due to the fact that shrinkage compensation is insufficient are avoided.

Description

technical field [0001] The invention relates to a low-pressure wheel hub mold, in particular to a mixed cooling low-pressure wheel hub mold, which belongs to the technical field of wheel hub molds. Background technique [0002] The low-pressure casting process is the main production process used by major aluminum wheel hub manufacturers. It is generally accepted by many manufacturers for its many advantages, and the core component of the process-the design and development of low-pressure casting molds is of great importance to the high efficiency of the company's products. Low-cost production has a very important impact. In the initial stage of the filling process, the heat dissipation of the casting is mainly heat conduction, that is, the mold itself absorbs heat, the mold heats up to absorb heat, and the aluminum liquid cools down to dissipate heat. Finally, the two reach a thermal balance. In this In the first stage, due to the rapid heat conduction and heat dissipation, ...

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Problems solved by technology

[0002] The low-pressure casting process is the main production process used by major aluminum wheel hub manufacturers. It is generally accepted by many manufacturers for its many advantages, and the core component of the process-the design and development of low-pressure casting molds is of great importance to the high efficiency of the company's products. Low-cost production has a very important impact. In the initial stage of the filling process, the heat dissipation of the casting is mainly heat conduction, that is, the mold itself absorbs heat, the mold heats up to absorb heat, and the aluminum liquid cools down to dissipate heat. Finally, the two reach a thermal balance. In this In the first stage, due to the rapid heat conduction and heat dissipation, and there is a large temperature difference between the mold and the molten aluminum, the molten aluminum has a chilling effect when it solidifies. At this time, the outer layer of the casting can be solidified into a dense structure with good mechanical properties. The rim of the formable wheel, because the thickness of the rim itself is small, uniform heating will cause the rim to form faster, resulting in casting defects, prone to large shrinkage cavities at the junction of the spokes and the rim, and rim shrinkage defects that cause gas Serious Phenomenon of Confidential Scrapping

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