Sand die set core gravity tilt-casting method for aluminum alloy cylinder cover

Abstract

The invention discloses a sand die set core gravity tilt-casting method for an aluminum alloy cylinder cover. Specifically, sand dies are used as outer dies needed by a cylinder cover casting, and cold iron is embedded partially in a sand core for local chilling of the casting; the combined sand dies are integrally put into a right angular metal frame and placed into a tilting device; one side ofa pouring cup of the sand die is made to face upwards, and then molten metal is poured into the pouring cup in the sand die; next, the sand die is overturned manually by the tilting device for tilt pouring, molten aluminum alloy flows into a casting sectional chamber inside the sand die with overturning of the sand die till the chamber is completely filled, and the casting is naturally cooled to aroom temperature after solidification; and in the end, the sand die is removed from the metal frame, sand falling by vibration is conducted, and a casting head and burr are removed, so the qualifiedcylinder cover casting is obtained. The method has the beneficial effects that based on a characteristic of stable mold filling of gravity tilt casting and principles for realizing bottom casting moldfilling, a level difference generated when the molten aluminum alloy reaches the sectional chamber is reduced.

Description

technical field [0001] The invention relates to an aluminum alloy casting technology, in particular to a sand mold core gravity tilting casting method for an aluminum alloy cylinder head. Background technique [0002] The structure of the automobile engine cylinder head is complex, including multiple cavities including intake and exhaust passages, oil passages, and water jackets. Leakage is not allowed in each cavity, and the wall thickness is thin and unevenly distributed, making casting difficult. At present, the production of aluminum alloy cylinder heads of existing engines mostly adopts semi-metallic gravity casting, and the feeding method is bottom injection or top injection single side feeding. In recent years, there are also production processes that use semi-metallic tilting casting and low-pressure casting. The above processes have very high requirements on casting equipment and automation, and the mold making cycle is long, expensive, and equipment investment is ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, to solve the problems of very high casting equipment and automation requirements, long mold production cycle, high cost, and large equipment investment; thereby providing an integrated manufacturing of internal sand cores using 3D printing technology, The casting molding method of sand mold core molding adopts the filling method of gravity tilting pouring

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