Bottom injection pouring system for a cylinder head

Abstract

The invention discloses a bottom gating system of a cylinder cover.The bottom gating system comprises a vertical pouring gate, a horizontal pouring gate and inner pouring gates, wherein the horizontal pouring gate is connected to the bottom of the vertical pouring gate, the plurality of vertical and upward inner pouring gates are arranged on the top surface of the horizontal pouring gate, and the openings of the inner pouring gates are formed in the tops of the inner pouring gates.The bottom gating system has the advantages that molten metal is injected from the bottom column of a cylinder cover cavity, mold filling is performed from bottom to top, the flow speed of the molten metal can be lowered effectively, impact of the molten metal on the shape and core is reduced, exhausting is benefited, stable and fast mold filling is achieved, low metal oxidization is achieved, high slag blocking ability is achieved, defects of sand and slag inclusion of casting can be avoided effectively, and casting quality is increased.

Description

technical field [0001] The invention relates to the technical field of gating systems, in particular to a bottom pouring gating system for 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 bear the action of high temperature and high pressure gas. The internal cavity structure of the cylinder head is very complex, which places extremely high requirements on the design of the gating system. In order to avoid defects such as sand inclusions and slag inclusions in the castings due to the impact of molten metal on the cavity formed by the sand core during the pouring process of the cylinder head, the traditional gating system design usually has the following methods: one is the top rain gating system, The inner runner is made of refractory materials (such as ceramic tubes) to reduce the erosion of molten iron on the sand mold, which can reduce the occurrence of sand and...

AI Technical Summary

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 bottom injection gating system for the cylinder head, so as to solve the problem of the traditional gating system in the current technology with complex structure, difficult design and low process yield. Low, high production costs

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