Method for increasing yield of lost foam casting of engine cylinder block

Abstract

The invention discloses a method for increasing yield of lost foam casting of engine cylinder blocks, and belongs to the technical field of lost foam casting of engine cylinder blocks; the problem to be solved is that a method for increasing casting yield of lost foam casting of engine cylinder block is provided; the adopted scheme is that: according to the method for increasing yield of lost foam casting of engine cylinder blocks, a coating for lost foam casting is coated on a surface of a lost foam, and dried; small holes and / or water channels on the lost foam of an engine cylinder block are filled solidly with resin sand; and the prefilled resin sand is tamped at a pressure intensity of 1.2-8*105 Pa; the invention is widely applicable to fields of various lost foam casting of engine cylinder blocks.

Description

technical field [0001] The invention relates to a method for improving the yield of lost foam casting engine cylinder blocks, belonging to the technical field of lost foam casting engine cylinder blocks. Background technique [0002] With the wide application of lost foam, the lost foam casting method has almost replaced the traditional sand casting process, but as a complex casting, there are still some problems in lost foam casting, and the product qualification rate is low, especially for engines The success rate of the lost foam casting of the cylinder block is only 70-80%. Such a pass rate is unprofitable for the foundry industry. There are many reasons for the low pass rate, but the main reason is that on the engine block. The small holes and water channels can not be formed smoothly during casting, and sometimes the small holes and water channels collapse and cause waste. SUMMARY OF THE INVENTION [0003] The invention overcomes the deficiencies of the prior art, a...

AI Technical Summary

Problems solved by technology

[0002] With the wide application of lost foam, the lost foam casting method has almost replaced the traditional sand casting method, but as a casting of complex castings, there are still some problems in the lost foam casting, and the product qualification rate is low, especially for engines. The success rate of the lost foam casting of the cylinder block is only 70-80%. Such a pass rate is unprofitable for the foundry industry. There are many reasons for the low pass rate, but the main reason is that the engine block The small holes and water channels cannot be formed smoothly during casting, and sometimes the small holes and water channels collapse to cause waste products