processingdetails

Transfer Mold Making

Transfer molding (TM), which also can be referred as the resin transfer molding (RTM,) is a low pressure closed molding process. Like compression molding,in the process of transfer molding, the molding material (usually a thermoset plastic) is measured before the molding. The molding material is poured into a chamber called as the pot. A plunger is then used to force the material from the pot through channels known as a sprue and runner system into the mold cavities. The mold remains closed as the material is inserted and is opened to release the part from the sprue and runner. The mold walls are heated to a temperature above the melting point of the mold material; this allows a faster flow of material through the cavities.

Compared to the compression molding, transfer molding combine the advantages of both. This combination has the good surface finish, dimensional stability, and mechanical properties obtained in compression molding and the high-automation capability and low cost of injection molding and transfer molding.