Mechanism of Crack on Resin Sand Core/Mold and Prevention Methods
Author of the article:ZHANG Benshui;WANG Baofu;LI Xingwen
Author's Workplace：Marketing Department of Jinan Shengquan Group Share Holding Co.,Ltd.,Jinan 250204,China
Key Words：resin sand crack of sand core/mould stress veining
Abstract：
Resin sand mould(core)surface using alcohol based coating,after ignition often crack,it affected the quality of the sand core/mould.Veins and burr defects often occur in casting due to sand mold(core)cracking after pouring metal liquid,which affected the quality of casting.The root cause of the cracking of resin sand mould(core)before and after pouring is the expansion of sand mould(core)after being heated.To avoid the paint after ignition(core)crack generation,to prevent the paint in the combustion process of the type(core)heating,reduce the type(core)in the iron liquid pouring cracking measures,it can avoid the type(core)in the process of expansion after heating compressive stress.
