Injection Moulding.docx

Injection Moulding.docx - Injection Moulding Injection...

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Injection Moulding Injection Moulding is used to produce large quantities of identical plastic items. It is the most important plastic manufacturing process. It can produce a wide range of products, including chairs, utensils, Lego, containers, toys, bins and even dingy hulls and kit car body shell parts. Stages- 1. Thermoplastic pellets are fed from a hopper to the injection moulding machine. 2. The moulding machine consist of a hallow steel barrel, containing a rotating screw called an Archemidial Screw. The screw carries the plastic along the mould 3. Heaters surround the barrel melt the plastic as it travels along the barrel 4. The screw is forced back as the molten plastic collects at the end of the barrel. Once enough plastic has collected in the hydraulic ram pushes the screw forward injecting the molten plastic through a sprue into the mould cavity 5. Pressure is maintained for a short period called dwell time to prevent the
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  • Spring '18
  • Injection molding, injection moulding, molten plastic

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