Cylinder cover casting method

Abstract

The invention discloses a casting method of a cylinder head. The sand mold is designed according to the cylinder head, and the sand mold is divided into several sand core units, and the sand core of the upper water chamber is designed as a complete integrated structure. The through hole, and the through hole is completely wrapped around the periphery of the airway sand core. There is a gap between the inner wall of the through hole of the upper water chamber sand core and the airway sand core. The upper water chamber sand core and the airway sand core are printed synchronously. Then the sand core units are combined to form a complete sand mold, and the cylinder head is obtained by casting in the sand mold. The casting method of the cylinder head described in the present invention reduces the number of sand cores, can effectively shorten the working time of core assembly, and makes the sand cores of the upper water chamber have no bonding gaps, and there will be no gaps during casting, which improves the The quality of castings does not require the use of binders, which solves the problem of choking caused by undried binders during casting pouring.

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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