Low pressure molding process and device

B - Operations – Transporting – 22 – D

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B22D 17/00 (2006.01) B22D 18/08 (2006.01) B22D 27/13 (2006.01)

Patent

CA 1100280

PRECIS DE LA DIVULGATION: L' invention concerne un procédé et un appareillage de moulage sous basse pression. Ce procédé consiste à asservir la pression de gaz neutre servant à provoquer la descente du mé- tal dans le tube d'injections après la coulée d'une pièce, à une valeur supérieure à celle régnant dans l'enceinte du four, l'écart entre les deux pressions étant réglable à une valeur cons- tante et à permettre deux débits différents de gaz neutre. L'invention s'applique, en particulier, à la coulée de pièces en alliages d'aluminium et de magnésium.

270895

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