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Casting is a process that involves mixing a base resin with a catalyst
and pouring the mixture into the mold. These materials can be
thermoplastic or thermoses and the process may or may not require adding
heat to the mold. This process is used to make sheet, rod, tube and
finished or semi-finished parts. The process requires considerable
process control to obtain high quality parts. Tubes, rods, sheets and
slabs are often made this way. Several examples of plastics that are
cast include acrylic, nylon, epoxy and urethane. Molds can be made
from steel, aluminum, urethane, epoxy, silicone, cardboard and other
materials. Much of this depends on how many parts are desired off the
tooling and if the part is completed to size and finish out of the mold
or if post finishing is planned. Advantages
- simpler and less costly mold
- free of residual stress
- suited or low production quantity
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Molding
- The guide to polymer processing technology,
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