Gear drawing standards - part 1: for spur, helical, double helical and rack.
齿轮制图标准。第1部分：正齿。螺旋齿。双螺旋齿和齿条。
2
To make sure that a plastic part with helicalgear and spur gear can be demoulded successfully, an injection mould is designed with double parting faces, point gate feeding and rotating demould.