Resin gear, and method and apparatus for producing the same

摘要

Gear-shaped resin sheets Sa are laminated such that tooth portions 2b are aligned in an axial direction, thereby preparing a spur gear-shaped net-shape body 4. ;Tooth portions of the resin gear formed in a lower die 12 are pressed in a helical tooth-shaped molding space to deform the tooth portions 4a of the net-shape body 4 into a helical tooth tilted relative to the axial direction, and the direction of reinforcement fibers at the tooth portions 2b of the molded resin gear 1 is tilted relative to the axial direction.

主权项

1. A resin gear produced by laminating a plurality of gear-shaped resin sheets in an axial direction to form a gear-shaped net-shape body and molding the gear-shaped net-shaped body, the sheets being made by dispersing a thermosetting resin and a reinforcement fiber in a liquid; and heating and compressing the dispersion,
wherein the resin gear has a resin ring composed of a ring-shaped portion and a plurality of tooth portions on an outer periphery of the ring-shaped portion, the tooth portions being helical teeth tilted relative to the axial direction, and the direction of a majority of reinforcement fiber in the ring shaped portion is perpendicular to the axial direction, and the direction of a majority of reinforcement fiber in the tooth portions is tilted relative to the axial direction and is of the same direction as a load applied on the tooth portions.