Transfer molding represents a further development of compression molding The uncured thermosetting material is placed in a heated transfer pot or chamber (Fig 18.13}. After the material is heated, it is injected into heated closed molds. A ram, a plunger, or a rotating- screw feeder (depending on the type of machine used) forces the material to flow through the narrow channels into the mold cavity.
Sequence of operations in transfer molding for thermosetting plastics.
This process is particularly suitable for intricate parts with varying wall thickness.