Casting apparatus

Details Casting apparatus Casting apparatus

2005-08-30

2005-08-30

Lin, Kuang Y. (Department: 1725)

Metal founding

Control means responsive to or actuated by means sensing or...

Control of feed material enroute to shaping area

C164S457000

Reexamination Certificate

active

06935407

ABSTRACT:
A casting apparatus has a melting pot (4) in which pieces of metal (8) to be melted is placed. A RF induction heater coil (10) is disposed in association with the melting pot (4) to heat the metal pieces (8). An inverter (18) supplies the coil (10) with high-frequency power to melt the metal pieces (8) in the melting pot (4), and the resulting molten metal is poured into a die (6). A control unit (36), after all of the metal pieces (8) having various sizes and shapes are melted, causes the operation of the inverter (18) to continue for a first time period and, after that, to suspend the operation of the inverter (18) for a second time period so that the heating can be stopped. After that, the control unit (36) causes the inverter (18) to resume its operation to heat the melted metal (8) in the melting pot (4) until the molten metal (8) assumes a predetermined state and, a third predetermined time after that, operates a melting pot driver (9) to cause the molten metal (8) to be poured into the die (6).

REFERENCES:
patent: 4796688 (1989-01-01), Gundlach et al.
patent: 6250367 (2001-06-01), Komuro et al.
patent: 6505675 (2003-01-01), Komuro et al.
patent: 11-285811 (1999-10-01), None

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