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.
FIGURE 18.ใ 3 Sequence of operations in transfer molding for thermosetting plastics.
This process is particularly suitable for intricate parts with varying wall thickness.