PURPOSE: To surely and easily supply molten metal into an injection sleeve in a die casting machine and to absorb the heat expansion of a parts by arranging a molten metal feeding pipe part having an inverse-U shape pipe part at the tip part of a molten metal supplying part and providing one end part of the inverse-U shape pipe part capable of sorking the heat expansion.

CONSTITUTION: When a specified quantity of the molten metal 8a stores in a chamber A, the device comes in the stationary operation. Then an electromagnetic pump 6 is operated by control quantity fetched with signal of molten metal level and temp., etc., of the molten metal 8a in the chamber A and the molten metal 8a is fed into the injection sleeve 4 through the molten metal feeding pipe 5. Thereafter, by operating an injection plunger, the injection is operated. Then, while maintaining the weighing precision, the expansion/ shrinkage of the device caused by variation of the temp. is soaked by an expansion/shrinkage soaking member 11 having gap (e).