Resin made gear, polyacetal resin composition for resin gear, manufacturing method thereof, and manufacturing method for resin gear

摘要

The invention relates to a resin gear, a polyacetal resin composition for the resin gear, a method for manufacturing the polyacetal resin composition and a method for manufacturing the resin gear. The task addresses the problem of obtaining a gear with high durability and high quietness. The resin gear comprises a gear ring part (2) and a teeth part (1) arranged on the periphery of the gear ring part (2), wherein a difference (d-c: residual strain) between a dependent variable c (%) and a dependent variable d (%) is lower than 0.9 percentage points, the above dependent variable c (%) is a dependent variable of the above gear ring part (2) or the above gear ring part (2) and the teeth part (1) after performing a load of 75 MPa and the gear after performing an unload of 75 MPa to 15 MPa, and the above dependent variable d (%) is a dependent variable of the gear after performing 50 times loads of 75 MPa and the gear after 50 times unloads of 75 MPa to 15 MPa.