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POLYMERIC PROCESSING (COMPRESSION MOULDING (An old and widely used…
POLYMERIC PROCESSING
COMPRESSION MOULDING
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Moulding compound - Powder or pellets, liquid, or preform
THERMOFORMING
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Materials: polystyrene, cellulose acetate, cellulose acetate butyrate, ABS, PVC, acrylic (polymethylmethacrylate), polyethylene, and polypropylene
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EXTRUSION
Compression process in which material is forced to flow through a die orifice to provide long continuous product whose cross‐sectional shape is determined by the shape of the orifice
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INJECTION MOULDING
Polymer is heated to a highly plastic state and forced to flow under high pressure into a mold cavity where it solidifies; molded part is then removed from cavity
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