Abstract
The injection molding plastic gears are used in such many fields as for domestic electrical products, information-processing equipment, audio-visual equipments, automobiles and so on. Many factors have an effect on load carrying characteristics of an injection molding plastic gear pair. Among others, the plastic materials and the temperature in plastics are the most important factors, because the plastic physical property is greatly different in each plastics type, and the high temperature in plastics causes the decrease in the modulus of longitudinal elasticity. In this study, the performance of the injection molding plastic gears is compared by the experiments from the point of strength and bulk temperature. The effect was investigated on two conditions, such as the transmitting torque and the bulk temperature of gear.
