Injection Moulding
Vacuum Forming | Stereolithography | Selective Laser Sintering | Ultrasonic Welding
Below are a brief summary showing the Injection Moulding Stages with relevant Injection Moulding Diagrams.
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Stage 1 – Plastic Injection Moulding Material granules from the hopper feed into the heated barrel and rotating screw. Material melted by heat, friction and shear force is forced through a check valve to the front by the rotating screw. |
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Stage 2 – Plastic Injection Moulding Having been moved backwards by the shot of material at the front, the screw is forced forward by a hydraulic ram. This action injects material into the mould cavity in the closed mould tool. |
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Stage 3 – Plastic Injection Moulding The tool is held closed under pressure until the plastic material cools and sets hard in the mould tool cavity. This is often the longest part of the injection moulding process |
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Stage 4 – Plastic Injection Moulding The screw starts to move back for the next moulding. The tool then opens and the finished plastic part is ejected. The tool is closed and the injection moulding process starts again at 1. |
