B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 45/00 (2006.01) B29C 37/00 (2006.01) B29C 45/16 (2006.01) B60J 1/08 (2006.01) E05F 11/38 (2006.01)
Patent
CA 2322491
Disclosed is a method for producing molded parts consisting of several components, using plastic processing machines. Plastified plastic material is injected into two cavities formed by the halves of a tool for each component. A sprue element is provided at least for the first component (1). The invention is characterized in that the sprue element (4) of at least the first component remains in the mold and is totally or partially encapsulated by injection molding by the next component (5) during one of the following working cycles. This reduces the number of additional working steps for the removal of the sprue and prevents eventual impurities in the environment, especially in the case of brittle material.
L'invention concerne un procédé permettant de produire des pièces moulées constituées de plusieurs composants, avec des machines de fabrication de matière plastique. Selon ce procédé, il est prévu pour chaque composant, d'injecter de la matière plastique plastifiée dans des cavités formées de deux moitiés d'outil. Il est prévu une carotte (4) pour le premier composant (1). Cette invention se caractérise en ce que la carotte (4) du premier composant demeure sur la pièce moulée et est surmoulée, entièrement ou en partie, au cours d'un des cycles de travail suivants, par le composant suivant. Ce procédé permet de ne pas avoir recours à d'autres étapes lors de l'élimination de la carotte et d'éviter d'éventuelles pollutions de l'environnement, notamment en cas de matériau friable.
Fetherstonhaugh & Co.
Krauss-Maffei Kunststofftechnik Gmbh
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