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1. (WO1991017010) VALVE MECHANISM FOR CASTING METAL ALLOYS WITH LOW MELTING TEMPERATURES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/017010 International Application No.: PCT/CA1991/000087
Publication Date: 14.11.1991 International Filing Date: 21.03.1991
Chapter 2 Demand Filed: 03.12.1991
IPC:
B22D 17/04 (2006.01) ,B22D 17/30 (2006.01) ,B22D 17/32 (2006.01) ,B22D 39/02 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
D
CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
17
Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
02
Hot chamber machines, i.e. with heated press chamber in which metal is melted
04
Plunger machines
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
D
CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
17
Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
20
Accessories; Details
30
Accessories for supplying molten metal, e.g. in rations
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
D
CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
17
Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
20
Accessories; Details
32
Controlling equipment
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
D
CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
39
Equipment for supplying molten metal in rations
02
having means for controlling the amount of molten metal by volume
Applicants:
ELECTROVERT LTD. [CA/CA]; 1305 Boulevard Industriel LaPrairie, Quebec J5R 2E4, CA
Inventors:
KIDD, Thomas, F.; US
THOMPSON, Stephen, A.; CA
Agent:
FETHERSTONHAUGH & CO.; Suite 456 409 Granville Street Vancouver, British Columbia V6C 1H5, CA
Priority Data:
520,21307.05.1990US
629,66619.12.1990US
Title (EN) VALVE MECHANISM FOR CASTING METAL ALLOYS WITH LOW MELTING TEMPERATURES
(FR) MECANISME DE VANNES UTILISE DANS LE COULAGE D'ALLIAGES METALLIQUES A BASSES TEMPERATURES DE FUSION
Abstract:
(EN) A valve mechanism for casting metal alloys with low melting temperatures provides two valves (22, 46) in a single assembly inside an alloy tank (10). The valves being in the tank reduces the formation of oxides which can occur in air and tends to reduce leaks . The apparatus comprises a tank (10) adapted to contain molten metal alloys, a cylinder (16) in the tank (10) having at its base a connection to an injection passageway (20) which leads through the tank (10) to a die (58) located outside the tank (10). A piston (18) reciprocates within the cylinder (16). Two valves (22, 46) are supplied in the passageway (20) in the tank (10) which allows molten metal alloy to be drawn into the cylinder (16) and forced through the passageway (52) to the die (58). A control system (86) for the piston (18) controls accurately the speed of piston (18) in the cylinder (16) when the molten metal alloy is fed to the die (58).
(FR) Un mécanisme de vannes amélioré dans le coulage d'alliages métalliques a basses températures de fusion comprend deux vannes (22, 46) dans un seul ensemble situé à l'intérieur d'un réservoir d'alliage (10). Les vannes situées dans le réservoir réduisent la formation d'oxydes pouvant se produire dans l'air, et elles tendent à réduire les fuites. L'appareil comprend un réservoir (10) adapté pour contenir des alliages métalliques en fusion, un cylindre (16) situé à l'intérieur du réservoir (10) présentant au niveau de sa base une connexion à un passage d'injection (20), lequel conduit par l'intermédiaire du réservoir (10) à une matrice (58) située à l'extérieur du réservoir (10). Un piston (18) va et vient à l'intérieur du cylindre (16). Deux vannes (22, 46) sont ménagées dans le passage (20) se trouvant dans le réservoir (10), lequel permet à l'alliage métallique en fusion de passer dans le cylindre (16), et de s'écouler à travers le passage (52) jusque dans la matrice (58). Un système de commande (86) destiné au piston (18) régule avec précision la vitesse du piston (18) dans le cylindre (16) lorsque l'alliage métallique en fusion est acheminé à la matrice (58).
Designated States: AT, AU, BB, BG, BR, CA, CH, DE, DK, ES, FI, GB, HU, JP, KP, KR, LK, LU, MC, MG, MW, NL, NO, PL, RO, SD, SE, SU
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CM, GA, ML, MR, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0527747CA2082417AU1991074584