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Question by plandai2003: Hi,Please explain : the extrude mold and injection mold method in plastic industry. Thanks so much.?
– Finished products to be made from these two methods.
– Can one method used to replace for the orther.
– For the PET material, what products will be made from these two method.
– Process of these two method

Best answer:

Answer by simsjk
Extrusion.. There is a mold or tooling which the molten plastic is forced through to produce a continuous shape.. Extrusion is used to make Plastic window frames, plastic bags, guttering, plastic tubing etc.
Injection.
There is a closed mold or tool which molten plastic is injected into, solidified and then removed.
For example the fittings that you use to fix your guttering to your roof, the dashboard of your car, , the soles of your shoes.. I.e. complex shapes that require dimensions in X, Y and Z axes whereas the Extruded only needs the X and Y axes.

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