Metal founding – Means to shape metallic material – Pressure shaping means
Patent
1994-01-19
1996-05-14
Lin, Kuang Y.
Metal founding
Means to shape metallic material
Pressure shaping means
1641554, B22D 1710, B22D 1732
Patent
active
055159052
ABSTRACT:
Horizontally movable mold halves respectively journal different plungers for movement within coaxial bores extending through the closed mold halves. With the mold closed, and one plunger extending through the mold to one side, a metered compartment is formed between the two carefully positioned plungers. A charge of molten metal, or the like, is transferred from a reservoir into the compartment and moved into the mold cavity by moving the two plungers in unison to a position at the die surface of the respective mold halves. After hardening, the mold halves are separated and one plunger ejects the molded article from the mold. The plungers and mold halves are moved by hydraulic cylinder rams into a sequence of fixed positions for different steps of a programmable molding cycle. Sensing switches provide feedback for establishing the plunger positions at various cycle steps. In particular a variable movable sensing switch establishes the capacity of the molten metal metered compartment to produce a charge precisely tailored for the mold cavity.
REFERENCES:
patent: 2972172 (1961-02-01), Federman
patent: 4354545 (1982-10-01), Goldhammer
patent: 4428413 (1984-01-01), Lester
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