Ceramic core in cylinder head cavity

Abstract

The invention discloses a ceramic core for an inner cavity of a cylinder cover. The ceramic core is a trapezoidal isosceles disk, wherein the diameter of the upper end surface of the disk is greater than that of the lower end surface of the disk; a boss is arranged at the center of the upper end surface of the disk; a central positioning core which protrudes outwards is arranged on the boss; a matched groove is formed in the circumference of the upper end surface of the disk; two lateral positioning cores which protrudes outwards are arranged on the lower end surface of the disk and are symmetric to each other relative to the center of the lower end surface of the disk; a hollow structure sunk into the lower end surface of the disk is arranged at each of symmetric positions on two sides of each lateral positioning core. By the adoption of the ceramic core for the inner cavity of the cylinder cover, a shell making process is easy and convenient to operate, the making difficulty of the type of a shell is lowered, the defects of non-uniformity in shell coating, break-out and the like are overcome, the effect is remarkable, and the inner cavity quality of a casting is fundamentally ensured.

Description

technical field [0001] The invention mainly relates to a ceramic core, in particular to a precision cast 41E914532 ceramic core for the inner cavity of a cylinder head. Background technique [0002] At present, the operation method for the complex structure of the inner cavity of the 41E914532 cylinder head is: after finishing each layer of paint, use a thin tube to blow air into the small pores of the inner cavity to make it fully dry. Observe the condition of the inner cavity coating, the sand in the inner cavity cannot be cleaned after the casting is poured. This traditional operation scheme is very easy to cause uneven coating in the inner cavity during the coating process, resulting in gunfire and iron clamping when the casting is pouring; the inner cavity core is easy to break when it is small and transferred, and the inner cavity sand cannot be cleaned. The scrap rate is 40%, which is serious. affect product delivery. Contents of the invention [0003] The object ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a ceramic core for the inner cavity of the cylinder head in order to effectively solve the operational difficulties of the inner cavity of the cylinder head in the processes of shell making, sand cleaning, and finishing, and to eliminate defects such as uneven shell coating and gunfire.

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