Moulding apparatus

Details Moulding apparatus Moulding apparatus

B - Operations, Transporting

29

D

18/53

B29D 99/00 (2010.01) B21D 51/46 (2006.01) B29C 43/00 (2006.01)

Patent

CA 1043060

A B S T R A C T Container closures are given the customary sealing gasket of plastics material by a two stage deformation of a pellet of the plastics material. In a first stage the material is partly deformed and is heated by direct conduction from a heated deforming member, and in the second stage a relatively cool final moulding die effects further deformation to impart the desired finished configuration to the gasket. The pressure member, and possibly also a workpiece support on which the upturned closure rests, is heated by means of a radiant heat source directing radiant heat onto a blackened roughened surface of the pressure member, and the work- piece support where applicable. The pressure member has a low-adhesion surface of polytetrafluoroethylene.

207434

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