A system for feeding portions of material to an injection...

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 45/18 (2006.01) B29C 31/02 (2006.01) B29C 45/76 (2006.01) G01G 11/08 (2006.01)

Patent

CA 2431479

The present invention is a system for feeding portions of material to an injection molding machine including a feeding means that can be a screw feeder (12), an external container (10), a material hopper (11) with inclined and parallel walls located inside the container, a load cell (16) that is coupled to the material hopper (11) and a controller (13). The system dispenses portions of material in a given time and for given duration. The system dispenses accurate weight portions. The system controls the portion weight by weighing a number of dispensed portions using loss-in-weight of the hopper, divides the weight to the number of portion and when it need, control the spin of the screw feeder motor (14).

La présente invention concerne un système permettant d'alimenter en portions de matériau une machine de moulage par injection, comportant un moyen d'alimentation qui peut être un alimenteur à vis (12), un conteneur extérieur (10), une trémie à matériau (11) pourvue de parois parallèles et inclinées, située à l'intérieur du conteneur, une cellule de mesure (16) qui est reliée à la trémie à matériau (11) et une unité de commande (13). Ce système distribue des portions de matériau à un moment donné et pour une durée donnée. Il distribue des portions présentant un poids précis. Ce système régule le poids des portions en pesant plusieurs portions distribuées par rapport à la perte en poids de la trémie, divise le poids par le nombre de portions et, lorsque cela est nécessaire, commande la rotation du moteur de l'alimenteur à vis (14).

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