Plastics and Composites Processing
5.1 Injection Moulding
Process Description
Granules of polymer material are heated and then forced under pressure using a screw into the die cavity. On cooling, a rigid part or tree of parts is produced (Figure 5.1(a)).
Figure 5.1(a) Injection Moulding.
Materials
Mostly thermoplastics, but thermosets, composites and elastomers can be processed.
Process Variations
• Injection blow moulding: allows small hollow parts with intricate neck detail to be produced.
• Co-injection: for products with rigid cores pre-placed in the die before injection or simultaneous injection of different materials into the ...
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