Cylinder cover casting method

Abstract

The invention discloses a cylinder cover casting method. A sand mold is designed according to a cylinder cover, and is cut to multiple sand core units; an upper water cavity sand core is designed as a complete integral structure, and is provided with a through hole; the through hole totally wraps the outer periphery of an air way sand core; a gap is formed between the inner wall of the through hole of the upper water cavity sand core and the air way sand core; the upper water cavity sand core and the air way sand core are synchronously and integrally printed; then, all the sand core units are combined as a whole to form the complete sand mold; and the sand mold is cast to obtain the cylinder cover. The cylinder cover casting method reduces the sand core number, can effectively shorten the core assembly working time, enables the upper water cavity sand core to have no binding gaps, cannot generate cracks in pouring, improves the casting quality, needs no adhesive, and solves the problem of fire boiling caused by no drying of the adhesive in the casting pouring process.

Description

technical field [0001] The invention relates to the technical field of casting of metal parts, in particular to a casting method of a cylinder head. Background technique [0002] The function of the cylinder head is to seal the cylinder, form a combustion space together with the piston, and withstand the action of high temperature and high pressure gas. The cylinder head bears the mechanical load caused by the gas force and tightening the cylinder bolts, and also bears a high thermal load due to the contact with the high-temperature gas. In order to ensure good sealing of the cylinder, the cylinder head must neither be damaged nor deformed. The internal cavity structure of the cylinder head of a diesel engine is very complicated. Unlike the conventional cylinder head upper water cavity, the upper water cavity completely wraps the air passage. The conventional casting method is to split the upper water cavity into two sand cores. During the core process, the lower part of t...

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Problems solved by technology

[0003] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology and provide a casting method of the cylinder head, which solves the problem that the traditional casting method in the current technology will cause seams at the bonding place of the upper water cavity, It is difficult to clean, and the organic binder must be dried, otherwise it may cause the casting to be scrapped due to fire during the pouring process, and the production efficiency will be low

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