Expandable Stmma Copolymer Resin Application: Lost Foam Cast

With a sole aim in delivering quality products, we are the prominent Exporter & Manufacturer of Expandable STMMA Copolymer Resin in Quzhou, Zhejiang, China.
STMMA copolymer resin series mold materials for lost foam casting, including STMMA,STMMA STMMA-FD and STMMA-FC foamable copolymer resin beads, and they are mainly used to produce castings for valves, pipings, car fittings and various machinery fittings.

Compared with EPS, STMMA series foamable copolymer resin beads have much excellent casting performances:
Reducing carbon defect of castings;
Reducing carburization defect on surface of steel castings;
Reducing smoke carbon;
Improving surface finish of castings

Aimed at these shortcomings,we self-developed a new series copolymer resin STMMA-FD.It can solve the low molecular weight,low intensity and rigidity problem of the EPS,and reduce the carburization during casting.The STMMA-FD could be most used medium-grade or low-grade foundry products such as grey iron and aluminium alloy.After the practice of production in many domestic lost foam casting foundries,with same process as using EPS in the prefoaming,aging,pattern making and coating drying, the STMMA resin beads greatly improved the stability,intensity and surface smoothness of the castings.The carburization defects had been also reduced, percent of qualification rate are increased 36%.