PG-3 ANALYSIS OF MOLDED DEFORMED LAYER OF INJECTION MOLDED PLASTIC GEAR(PLASTIC GEARS)

概要

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The plastic gear is effective from the viewpoint of the productivity for the comparatively small gear. Generally, the plastic gear is made by the injection molding of the crystal resin. In the case of the injection molding plastic gear, the deformed layer nearby the surface of tooth is softer than the core structure. Authors noticed that the sound level of the two plastic gears engaged was low while a skin layer and an intermediate one existed. It is expected that the noise level is kept low by positively forming deformed layer with some extent thickness. In this paper, the formation mechanism of the deformed layer in the injection molding plastic gear is studied. FEM is used to perform the thermal analysis of the cooling process of the resin filled in the mold. According to the analytical results, the cooling rate of melting polymer of the near-wall region as well as the case of the product of metal amorphous alloy was very rapid. The relationship between the manufacturing conditions and the deformed layer for the injection molding gear was estimated
一般社団法人日本機械学会の論文
2001-11-15