Foaming agent charging and mixing device

Details Foaming agent charging and mixing device Foaming agent charging and mixing device

B - Operations, Transporting

29

C

B29C 44/34 (2006.01) B29C 44/04 (2006.01) B29C 44/60 (2006.01) F16K 11/085 (2006.01)

Patent

CA 2431718

A foaming agent charging and mixing device comprises at least one mixing means and one foaming agent metering means, wherein the foaming agent charging and mixing device may be arranged between an plasticating screw and a mold. In order to improve the foaming agent charging and mixing device in a manner that the mixing with foaming agent is facilitated and at the same time a risk of obstruction of the foaming agent metering means is avoided, the foaming agent metering means is alternately opened and closed through the mixing means during its operation for supplying foaming agent to the plastic melting.

L'invention concerne un dispositif de chargement et de mélange d'agent moussant (1), présentant au moins une unité de mélange (2) et une unité de dosage d'agent moussant (3). Ce dispositif de chargement et de mélange d'agent moussant peut être placé entre une extrudeuse (4) et un outil de formage (5). L'objectif de l'invention est d'optimiser ce dispositif de chargement et de mélange d'agent moussant de façon à faciliter le mélange avec l'agent moussant tout en évitant un risque d'engorgement de l'unité de dosage d'agent moussant. A cet effet, l'unité de dosage d'agent moussant servant à acheminer l'agent moussant à la matière plastique fondue est ouverte et fermée en alternance par l'intermédiaire de l'unité de mélange lors du fonctionnement de cette dernière.

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