| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure control unit for casting machine with which molten metal can be filled up into a cavity in a mold with the molten metal filling mode capable of forming the high quality product. SOLUTION: The pressure control unit 1 for casting machine is formed in such a manner that following two means are parallelly performed at each prescribed unit treating time: a pressure-control means in a furnace, with which a valve-working mode following with a pressure control pattern A in the furnace, is treated and decided based on the pressure value detected with a pressure sensor 15 in the furnace and a pressure-control valve 13 in the furnace is opened/closed according to this mode; and a pressure-control means in a cavity, with which a valve-working mode following with a pressure control pattern B in the cavity, is treated and decided based on the pressure value detected with a pressure sensor 16 in the cavity and a pressure control valve 14 in the cavity is opened/closed according to this mode. Therefore, the precise molten metal filling mode for forming the desirable product can suitably be made, and even in the case of forming a product having complicated form, this product having high quality can stably be cast and formed without developing any trouble such as shrinkage. COPYRIGHT: (C)2005,JPO&NCIPI
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