Device and method for compression molding of plastic articles

Details Device and method for compression molding of plastic articles Device and method for compression molding of plastic articles

B - Operations, Transporting

29

C

B29C 31/04 (2006.01) B29C 43/34 (2006.01)

Patent

CA 2649640

The invention concerns a device for molding a plastic material article whereby the article is obtained by compressing a dose of molten plastic material (3) between two parts of a mold, comprising at least one plastic material supply (1), a rod (11) sliding in a dowel bush (8) for temporarily supporting said dose of plastic material (3), an article head mold (6, 7), a mandrel (18) co-operating with said mold (6, 7). The invention is characterized in that it comprises non-elastic retaining means (12-14,23,24) for limiting the two-way movement of the rod (11) in the dowel bush (8). The invention also concerns a method using said device.

L'invention concerne un dispositif de moulage d'un article en matière plastique dans lequel l'article est obtenu par la compression d'une dose de matière plastique (3) à l'état fondu entre les deux parties d'un moule, comprenant au moins une alimentation de matière plastique (1), une tige (11) coulissant dans une douille (8) adaptée pour supporter temporairement ladite dose de matière plastique (3), un moule de tête d'article (6,7), un mandrin (18) coopérant avec ledit moule (6,7), caractérisé par le fait qu'il comprend des moyens de retenue non-élastiques (12-14,23,24) qui sont adaptés pour limiter le déplacement bidirectionnel de la tige (11) dans la douille (8). L'invention concerne également un procédé utilisant le dispositif précité.

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