| 摘要 |
PURPOSE:To prevent cooling of a metallic mold at more than necessary degree, by setting a water flow time in the metallic mold for one casting cycle in shortening time in accordance with length of a machine stopping time and setting number of casting shot, shortening the water flowing time. CONSTITUTION:The cooling water W is flowed in a hole 5 for cooling of the metallic mold 4 by a pump 2 and the cooling water W is returned to a cooling water tank 1 after heat-exchanging. In this operation, a solenoid valve 9 is inserted between the pump 2 and a flow regulator 7 in the cooling water inlet line 3 of the metallic mold 4 and is connected electrically with a pattern setting device 8. By this constitution, the machine is stopped for the prescribed time, and then, the time from stop to start of the working is counted by a counter 10, and at the same time of restart of the machine working, by this signal 11, the command is transmitted to the pattern setting device 8 in accordance with the number of count. Next, the pattern setting device 8 is worked and the command from the counter 10 is transmitted to the solenoid valve 9, to work opening of the valve following the command and flow the cooling water into the metallic mold 4. After the setting pattern finishes, the metallic mold 4 is kept to cool at suitable temp. by executing the conventional continuous water flow. |
