INJECTION MOULDING REVISION

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INJECTION MOULDING REVISION

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1. INJECTION MOULDING REVISION

2. Injection moulding The first stage is when the plastic is fed in and the piston is drawn back

3. Injection moulding The next stage is when piston moves forward forcing molten plastic into the mould.

4. Injection moulding The moulding is then eject from the mould and you have your product.

5. More information on injection moulding

6. More information on injection moulding Moulds The moulds that are used are machined from high chromium steel, they cost several thousand of pounds. But this can be economic as this mould be used to make as many thousand of components. Different moulds need to be fitted into the machine for different components,

7. More information on injection moulding Material Normally thermoplastics are used in this process although a few thermosetting plastics can be injection moulded Thermo plastics can be altered by adding plasticisers and other chemicals to improve such things as impact and ultra violet resistance. A wide range of colours are available, this is achieved by adding 1% colour mix prior to melting

8. Revision Tips You should be able to describe the process of Injection Moulding using notes and sketches in the examination. Not sure you can? Then practice NOW!

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