Lost Foam Casting Process for a Pyramid Shaped Cluster of Small Patterns with Proportional Solidification Theory
Author of the article:LIU Lizhong
Author's Workplace：Hangzhou Guiju Casting Machinery Ltd.,Hangzhou 311400,China
Key Words：using the cavity as a runner proportional solidification lost foam pattern cluster like pyramid
Abstract：Based on the analysis of damage of complex gating system on formability in expendable casting process,an idea using mold cavity(lost foam pattern)as runner to simplify gating system was put forward.This method not only saves liquid metal but also reduce heat loss during pouring,thus the effective heat carried by liquid metal can be act on form pattern,and also prevent contamination of gating foam pattern on mold cavity.Pyramid shaped clusters of lost foam patterns were made in which mold cavity was used as runner.The pyramid shaped clusters made of lost foam patterns were poured and casting quality was good.This is also an example of applying proportional solidification.
