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...Plastics processing can be machined cast formed and joined with relative ease requiring little post or surface finish operations melt cure at low temperatures require less energy to process than metals raw materials most commonly are pellets powders also available as sheet plate rod tubing produced by extrusion etc liquid used make reinforced plastic parts composite processes table characteristics long uniform solid hollow complex cross sections high production rates tooling costs wide tolerances injection molding shapes of various sizes eliminating assembly costly good dimensional accuracy structural foam large stiffness weight ratio expensive in blow thin walled cost for making containers rotational relatively simple shape thermoforming shallow deep cavities medium compression similar impression die forging inexpensive transfer more higher some scrap loss casting intricate made flexible molds cycle times depend on...