Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1992-09-28
1994-07-26
Batten, Jr., J. Reed
Metal founding
Process
Shaping liquid metal against a forming surface
164109, 164113, 164312, 164333, 164335, 164513, B22D 1712, B22D 1900
Patent
active
053320263
ABSTRACT:
An ingot having a predetermined amount of electrolytic copper and a small percentage of boron copper alloy is rapidly heated to about 2,100.degree. F. in a clay graphite crucible by induction coils surrounding the crucible. The crucible and the entire amount of molten copper are automatically transferred to a cavity defined within a shot cylinder above a vertically movable shot piston of a vertical die casting press. A shuttle moves a lower end ring mold and a stack of connected rotor laminations into a position above the shot cylinder, and the press moves an upper end ring mold downwardly to clamp the stack between the molds and against the cylinder. The molten copper is rapidly injected upwardly through gates within the lower mold and into end ring cavities within the molds and also through connecting aligned bar slots within the stack of laminations with a shot pressure of about 2250 psi. After the copper solidifies by circulating cooling water within the molds, the press opens and the die cast rotor and lower mold are transferred by the shuttle to a position where the rotor is ejected upwardly from the lower mold by a fluid cylinder. The copper rotor is annealed by induction heating the rotor to about 1,500.degree. F. and allowed to air cool.
REFERENCES:
patent: 2265333 (1941-12-01), Wry
patent: 2607969 (1952-08-01), Evans et al.
patent: 2917797 (1959-12-01), Poughnand
patent: 2938250 (1960-05-01), Larsh et al.
patent: 2991518 (1961-07-01), Schaefer
patent: 3315315 (1967-04-01), Triulzi
patent: 3584345 (1971-06-01), Beastrom
patent: 3826302 (1974-07-01), Wunder
Kamm Richard J.
Thieman Ted H.
Batten, Jr. J. Reed
THT Presses Inc.
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