Title:
PRESSURE CASTING METHOD
Document Type and Number:
Japanese Patent JP3044092
Kind Code:
B2
Abstract:
PURPOSE: To prevent the bulging of oxide film by carrying out the casting while applying the prescribed pressure in a cavity for the period of time from just before molten metal covers the whole periphery of sand core to the prescribed time after covering the whole periphery thereof.
CONSTITUTION: By pressurizing a furnace body 1, the molten metal 2 is poured into the cavity 5 through a stork 8. For the period of time from just before the molten metal 2 covers the whole periphery of sand cores 6A, 6B to the prescribed time after covering the whole periphery, a pressure adjusting means 15 is worked to apply the prescribed pressure into the cavity 5 through a piping 12. By keeping the pressure at the molten metal side higher than that of gas generated from the sand cores 6A, 6B, the oxide film at the molten metal 2 side is not bulged and a blow hole with gas defect is not developed.
Inventors:
Yuji Hori
Application Number:
JP15324291A
Publication Date:
May 22, 2000
Filing Date:
June 25, 1991
Export Citation:
Assignee:
Mazda Corporation Inc
International Classes:
B22D18/04; B22D18/06; B22D18/08; (IPC1-7): B22D18/04; B22D18/08
Domestic Patent References:
| JP2187247A | ||||
| JP2251355A |
Attorney, Agent or Firm:
Hiroshi Maeda