| 摘要 |
PURPOSE: A low pressure casting machine is provided in which upper mold die is smoothly separated from lower mold die by naturally generating a gap between the upper and lower mold dies in the cold working state. CONSTITUTION: The low pressure casting machine comprises a plurality of retreat preventing plates(31) installed at edge part of the outskirts of lower mold die by bolt connection with being spaced apart from each other in a certain distance; a pressing member(41) which penetrates through hole(32b) formed on connection part(32) of the retreat preventing plates(31), one end of which corresponds to inclination plane(32a) of the connection part(32), and the other end of which is projected to an outer side of the connection part(32), wherein screw groove(41a) is formed on the other end of the pressing member(41); an adjusting bush member(42) which is inserted into the pressing member(41), and one end of which is surface contacted with the pressing member(41); a nut member(43) which is clamped to the screw groove(41a) of the pressing member(41) and surface contacted with the adjusting bush member(42); and a releasing bush member(71) which has higher coefficient of linear expansion than the adjusting bush member(42) and connected to the outer circumferential surface of the adjusting bush member(42) by screw clamping.
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