Hollow type wheel sand core with positioning function and exhaust function

Abstract

The invention relates to a hollow type wheel sand core with a positioning function and an exhaust function. The hollow type wheel sand core comprises a sand core body and is characterized in that the sand core body is of a hollow type structure with a sand core cavity; a plurality of rectangular positioning bodies evenly distributed in the circumferential direction and a plurality of cylindrical positioning bodies evenly distributed in the circumferential direction are arranged on the outer circumferential face of the sand core body; and the rectangular positioning bodies and the cylindrical positioning bodies are alternately arranged in the circumferential direction. The hollow type wheel sand core is simple in structure, reasonable in design and capable of greatly increasing the pouring yield of wheel products and improving production benefits.

Description

technical field [0001] The invention relates to a wheel sand core used for gravity casting hollow wheels, in particular to a hollow wheel sand core with positioning and exhaust functions, belonging to the technical field of automobile parts processing and manufacturing. Background technique [0002] In the prior art, some gravity-cast hollow aluminum alloy wheels require a relatively large volume of sand core due to the large hollow cavity. The traditional sand core with a solid structure will cause the production of sand core sand Serious waste. In order to solve this problem, some sand cores adopt a hollow design, but because the weight of the hollow sand core is relatively light, when the wheel mold is poured, the buoyancy of the hollow sand core in the aluminum liquid is too large, and the positioning is unstable, which is easy to cause the wheel product center. The wall thickness of the cavity is offset and the product is scrapped. Moreover, the cavity of the existing...

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Problems solved by technology

[0002] In the prior art, some gravity-cast hollow aluminum alloy wheels require a relatively large volume of sand core due to the large hollow cavity. The traditional sand core with a solid structure will cause the production of sand core sand Serious waste

In order to solve this problem, some sand cores adopt a hollow design, but because the weight of the hollow sand core is relatively light, when the wheel mold is poured, the buoyancy of the hollow sand core in the aluminum liquid is too large, and the positioning is unstable, which is easy to cause the wheel product center. The wall thickness of the cavity is offset and the product is scrapped

Moreover, the existing hollow sand core cavity is airtight. When the wheel product is poured, the gas in the sand core cavity will thermally expand, which will easily lead to quality problems.

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