METHOD FOR MANUFACTURING RESIN GEAR

摘要

PROBLEM TO BE SOLVED: To reduce the number of processes for removing and cleaning the cured resin remaining on the injection and discharge sides of a liquid resin while reducing even the generation amount of a resin becoming waste, in manufacturing a resin gear through a process for injecting the liquid resin in a mold housing a reinforcing fiber base material to impregnate the base material. SOLUTION: A strip-like felt 12 is wound in a superposed state and further axially compressed to form a cylindrical body 13 folded in a bellows state. A metal rod 11 is passed through a plurality of the cylindrical bodies 13 and the height of the cylindrical bodies 13 is set so as to exceed the length of the metal rod 11 to constitute a long pillar body 1 consisting of the cylindrical bodies 13 and the metal rod. The long pillar body 1 is housed in a mold opened and closed in its axial direction and axially compressed by mold closing operation. The liquid resin 3 is injected in the closed mold 2 to be infiltrated into the cylindrical bodies 13 and the metal rod 11 is inserted to mold the long pillar body l. Cutting processing is applied to the molded long pillar body 14 to form a gear. Since the molded long pillar body 14 has a height corresponding to a plurality of gears, it is cut and divided in predetermined width (the thickness of the gear).