发明名称 METHOD FOR CONTROLLING PRESSURIZATION OF LOW PRESSURE CASTING MACHINE
摘要 PURPOSE:To maintain the specified pressurizing force of a molten metal, to stabilize production and to improve the quality of a product by controlling the position of a molten metal level to always the specified range in accordance with the position of the molten metal level detected by the molten metal level detection sensor utilizing the reflected wave of the ultrasonic wave. CONSTITUTION:The molten metal 2 in a holding furnace 1 is raised in a stalk 7 or sub-riser 10 by the air pressure introduced into the furnace through a variable valve 14 by the signal of a sequencer 13. The position of the molten metal level 2b is detected by a sensor 11b for detecting the lower limit molten metal level utilizing the reflected wave of the ultrasonic wave and the pressurization is stopped. The pressure for the pressurization is decreased until a sensor 11a for detecting the upper limit molten metal level turns off when the sensor 11a detects the molten metal level 2b. The molten metal level is maintained always in the specified method and the quality is stabilized by the above-mentioned method.
申请公布号 JPS62192249(A) 申请公布日期 1987.08.22
申请号 JP19860032905 申请日期 1986.02.19
申请人 HITACHI METALS LTD 发明人 NISHIMOTO SHUJI;IIZUKA NOBORU;SASAKI MIKIO
分类号 B22D18/08 主分类号 B22D18/08
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