Modified hot runner systems for injection blow molding

Details Modified hot runner systems for injection blow molding Modified hot runner systems for injection blow molding

B - Operations, Transporting

29

C

B29C 45/30 (2006.01) B29C 45/28 (2006.01)

Patent

CA 2689030

An injection blow molding method for making a container comprising the steps of injecting a molten crystallizable polymer in a preform mold via a hot runner system and biaxially stretching the preform by blowing, thereby forming a container, characterized in that said method further comprises means to selectively modify the flow path of the molten crystallizable polymer within the hot runner system.

L'invention concerne un procédé de moulage par injection-soufflage pour fabriquer un contenant, le procédé comprenant les étapes consistant à injecter un polymère cristallisable fondu dans un moule de préforme par l'intermédiaire d'un système de canal chauffant et étirer biaxialement la préforme par soufflage, formant ainsi un contenant. Le procédé est caractérisé par le fait qu'il comprend en outre des moyens pour modifier de façon sélective le trajet d'écoulement du polymère cristallisable fondu à l'intérieur du système de canal chauffant.

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