Metal founding – Process – With measuring – testing – inspecting – or condition determination
Patent
1995-05-12
1996-09-03
Lavinder, Jack W.
Metal founding
Process
With measuring, testing, inspecting, or condition determination
164119, 164306, 1641553, B22D 4600, B22D 2713, B22D 1706, B22D 1732
Patent
active
055515029
ABSTRACT:
In a low-pressure casting in which molten metal is introduced into a cavity of a casting mold under a pressure applied to the surface of the molten metal according to a preset reference pressurizing pattern, the reference pressurizing pattern is corrected when that the cavity has been filled with molten metal is detected and the pressure applied to the molten metal surface is controlled according to the reference pressurizing pattern after the correction. The pressure difference between a set pressure at a predetermined time in the reference pressurizing pattern after the correction and a set pressure at the corresponding time in the reference pressurizing pattern before the correction, is calculated and a set pressure for the period up to the time the cavity is filled with molten metal in the reference pressurizing pattern for the next casting cycle is corrected on the basis of the calculated pressure difference.
REFERENCES:
patent: 4585050 (1986-04-01), Merrien et al.
patent: 5372181 (1994-12-01), Watanabe et al.
Matsubayashi Nobuyuki
Takeshita Toru
Ferguson Jr. Gerald J.
Lavinder Jack W.
Lin I.-H.
Mazda Motor Corporation
Studebaker Donald R.
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