Method of moulding plastics articles and articles produced...

Details Method of moulding plastics articles and articles produced... Method of moulding plastics articles and articles produced...

B - Operations, Transporting

29

C

B29C 45/44 (2006.01) A61F 5/448 (2006.01) B65D 41/04 (2006.01)

Patent

CA 2135604

A method of injection moulding an undercut formation (26) on a circular body (20) wherein said formation is moulded in a series of arcuate sections (28) alternating with spaces (29), and wherein the moulding core (24) which produces the formation is extracted by firstly relatively rotating said body (20) and said core (24) so that the body is expanded radially and then ejecting the body off the core. The method is applicable to the manufacture of novel closure members and coupling elements.

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