B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
B22D 17/30 (2006.01) B22D 17/20 (2006.01)
Patent
CA 2198269
A die casting shot sleeve having an overflow hole and an overflow valve for selectively opening and closing the overflow hole. The overflow hole extends through the shot sleeve at a level below the pour hole to allow molten material in excess of a predetermined volume to spill from the shot sleeve. When open, the overflow hole permits excess metal to spill from the shot sleeve. When closed, the metal can be expelled from the sleeve without additional material spilling through the overflow hole.
Cette invention concerne un cylindre d'injection pour coulée sous pression qui comporte un orifice de trop-plein et un clapet de trop-plein permettant alternativement d'obturer et de dégager l'orifice de trop-plein. L'orifice de trop-plein traverse le cylindre d'injection à une distance telle du trou de coulée que le métal fondu en excès d'un certain volume prédéterminé est rejeté hors du cylindre d'injection. En position ouverte, le clapet de trop-plein laisse le métal fondu excédentaire s'écouler du cylindre d'injection. En position fermée, il force l'expulsion du métal hors du cylindre d'injection sans rejet par l'orifice de trop-plein.
Borden Ladner Gervais Llp
Nelson Metal Products Corporation
LandOfFree
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