| 摘要 |
PURPOSE:To operate intricate stages with good sequence and to prevent drop-outs and overlaps by installing pilot lamps, and various operating knobs on a system mimic diagram which displays the various mechanisms of pressure casting by high frequency melting. CONSTITUTION:When an electric power source 33 is turned on, a power lamp 34, a water lamp 36, and an input lamp 36 for melting temp. controller are lighted. When a melting temp. control button 37 is selected according to the kinds, quantity, etc. of casting, a bar-like lamp 38 is lighted. When an operating button 39 is closed, the inside of a heating chamber is evacuated, a housing and a mold cradle are moved upward, a pump output lamp 40 and an air release pilot lamp 26 are lighted, the housing is brought into press contact with a stationary cover and the mold cradle into the mold, an airtight pilot lamp 32 is lighted and the evacuation of the heating chamber is stopped. If whether the pressure casting is to be executed in a vacuum atmosphere or a gaseous Argon atmosphere is selected with operating knobs 41, 42, the lamps 26, 27 are lighted. High frequency induction heating is effected, and pilot lamps 31, 43 are lighted. When a pressurizing button 44 is closed at a proper timing, molten metal is charged under pressure, pilot lamps 28, 30, 45 are lighted for a prescribed time and the charging of the molten metal under pressure is completed. |
