Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1991-06-04
1992-01-21
Lin, Kuang Y.
Metal founding
Process
Shaping liquid metal against a forming surface
164133, 164316, B22D 1704
Patent
active
050820451
ABSTRACT:
Casting apparatus which includes a dispenser (4,5) defining a dispensing chamber (21) of variable volume receiving molten metal (3) in use, a valve (8) having a housing (23) defining a valve chamber (24) and a passageway (7) communicating between the valve chamber and the dispensing chamber, the valve further defining an inlet port (8a) communicating with a supply (2) of molten metal and further defining an outlet port (8c) communicating with a die (9), a valve member (8d) located in the valve chamber, actuating mechanism (26) selectively operable to move the valve member into a first position closing the inlet port and a second position closing the outlet port whereby in the first position the valve connects the dispensing chamber with the die for casting metal and in the second position the valve connects the dispensing chamber with the supply of molten metal for recharging the dispensing chamber, the valve including first and second annular seats (41,42) surrounding the inlet and outlet ports respectively and engageable by respective first and second annular sealing surfaces (47,48) of the valve member in the first and second positions respectively and wherein the actuating mechanism includes a stem (25) fixed to the valve member, a linear actuator (27) operable to provide reciprocating axial movement of the stem, and a rotating mechanism (15) operable during axial movement of the stem to rotate the stem so as to vary the relative contact position of the respective seat and sealing surfaces.
REFERENCES:
patent: 3168225 (1965-02-01), Miller et al.
patent: 3184811 (1965-05-01), Bennett et al.
patent: 3430685 (1969-03-01), Drugowitsch
patent: 3581767 (1971-06-01), Jackson
Fry's Metals Ltd.
Lin Kuang Y.
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