A Plastic Injection Moulding Machine is an industrial machine used to manufacture plastic components and products by heating plastic raw material until it melts and then injecting the molten material into a mould cavity under controlled pressure. Once the material cools and solidifies, the mould opens and the finished plastic component is ejected.
Plastic injection moulding is one of the most widely used manufacturing processes for high-volume production of consistent, accurate, and complex plastic parts.
How Does a Plastic Injection Moulding Machine Work?
The injection moulding process generally follows these steps:
- Material Feeding – Plastic pellets or granules are loaded into the hopper.
- Heating & Melting – The plastic passes through a heated barrel where it is melted by heat and screw movement.
- Injection – The reciprocating screw pushes the molten plastic through the nozzle into the mould cavity.
- Packing & Holding – Controlled pressure helps fill the cavity properly and compensate for material shrinkage.
- Cooling – The molten plastic cools and solidifies inside the mould.
- Mould Opening – The clamping unit separates the mould halves.
- Ejection – The ejector mechanism removes the finished product.
- Cycle Repetition – The mould closes and the next production cycle begins.
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