Injection moulding method and product

Details Injection moulding method and product Injection moulding method and product

B - Operations, Transporting

29

C

B29C 45/17 (2006.01) B29C 44/34 (2006.01)

Patent

CA 2328091

The present invention relates to a method of injection moulding an ornamental product of thermoplastic material the improvement comprising adding a foaming agent to the thermoplastic material, differentially cooling the product inside the mould whereby the parts to be expanded are cooled sufficiently to form a skin, but where said parts have a temperature remaining high enough to permit foaming expansion outside the mould while the balance of the product is cooled below the solidification temperature of the polymer.

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