| 摘要 |
PURPOSE:To improve finishing accuracy of a casting by incorporating heat sensors in the casting and gas ejectors for cooling and heaters in a casting mold and averaging the internal temp. of the casting during solidifying. CONSTITUTION:Electric heaters 6 and gas ejectors 5 for cooling are disposed in casting molds 1, 2 and heat sensors 9 are embedded in a casting. The temp. in the slow cooling stage from the radiation down to an ordinary temp. in the stage when each part of the casting solidifies is measured by the sensors 9 with lapse of time and the temp. measured signal is applied to a computer. The computer ejects a cooling gas from the ejectors 5 to the point where the temp. is higher than the average temp. in the casting at the point of the time when the temp. is measured. The computer heats additionally the point where the temp. is lower than the average temp. by the heaters 6. The casting is thus slowly cooled while the temp. over the entire part thereof is averaged and is cast. |
