Preparation process of heat resisting film-coating sand


Application Number: 00108082
Application Date: 2000.06.13
Publication Number: 1274626
Publication Date: 2000.11.29
Priority Information:
International: B22C1/20;B22C1/22
Applicant(s) Name: Qin Shengyi
Address:
Inventor(s) Name: Qin Shengyi
Patent Agency Code: 11250
Patent Agent: zhang jie
Abstract The preparation includes the steps of heating sand; mixing phenolic resin binder with the heated sand; adding refractory particle with stirring; adding hexamethylenetetramine as curing agent with stirring; and cooling, crushing and sieving the mixture to obtain the film coating sand. Compared with avilable technology, the preparation process is simple and can produce film coating sand for the requirement of shell casting.