INJECTION MOLDING MACHINE AND MAINTENANCE METHOD OF THIS INJECTION MOLDING MACHINE

PROBLEM TO BE SOLVED: To easily disassemble a screw shaft by shortening the time needed to melt deposited metal. SOLUTION: A male screw 6 screwed into a female screw 7 of the screw shaft 4 is formed at one end part of the screw shaft 16 and a wrench catcher 18 for a tool, such as a wrench is formed at the other end of the screw shaft. Further, a male screw 20 screwed into a nut 17 is formed at the side of the screw shaft where the wrench catcher 18 is formed. Diameter d of the circumscribed circle of the wrench catcher 18 is smaller than the outer diameter D of the male screw 20 so as to enable to take in/take out the nut 17. An intermediate part 16a fitted to a through-hole 5a of a pushing metal 5 and a through-hole 23a of an intermediate piece 23, is formed between the male screw 6 and the male screw 20. At the front surface 24 side of a female screw 17a, where the shaft 16 is protruded, the female screw end part 22 of the nut is formed, and the deposited metal between the male screw 20 and the nut 17, is directly heated or a chemical for melting the deposited metal can be poured. COPYRIGHT: (C)2004,JPO