Gas pressure control apparatus
AssigneeUbe Machinery Corporation, Ltd.
InventorHiroaki Miyoshi
Life of this patent
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Abstract
A gas pressure control apparatus that can control a pressure applied to a surface of molten metal with high accuracy. A gas pressure control apparatus includes a gas generation unit configured to generate nitrogen gas, and a pressure control unit configured to adjust a pressure of the nitrogen gas generated by the gas generation unit and to supply the nitrogen gas to a low-pressure casting apparatus. The pressure control unit includes a servo valve configured to control a flow rate of the nitrogen gas supplied from a tank and to cause the nitrogen gas to flow toward the low-pressure casting apparatus, and a pressure controller configured to adjust an opening degree of the servo valve based on a measured pressure Pm of the nitrogen gas supplied to the low-pressure casting apparatus.
Claims19
A gas pressure control apparatus, comprising:
- a gas generation unit configured to generate nitrogen gas;
- and
- a pressure control unit configured to adjust a pressure of the nitrogen gas generated by the gas generation unit, and to supply the nitrogen gas to a low-pressure casting apparatus, wherein
- the gas generation unit includes a separator configured to separate and extract the nitrogen gas from taken-in air, and a tank configured to store the nitrogen gas extracted by the separator, and
- the pressure control unit includes a servo valve configured to control a flow rate of the nitrogen gas supplied from the tank and to cause the nitrogen gas to flow toward the low-pressure casting apparatus, and a pressure controller configured to adjust an opening degree of the servo valve based on a measured pressure of the nitrogen gas supplied to the low-pressure casting apparatus.
Dependencies are inferred from the claim text.