1. the cavity layout. According to the geometric structure of plastic parts, dimensional precision, batch size, mold manufacturing, tooling costs determines number of cavities and arrangement.
2. determination of parting surfaces. Location of the parting surface should be conducive to mold, venting, mold and molding operation, plastic surface quality of the workpiece.
3. feed system (main gate, sprue and gate shape, location, size) and exhaust system (exhaust, air vent location, size).
4. Select the top out of the way (top bar, top of the top tube, push plates, modular), decided to undercut treatment methods, core-pulling method.
5. determine the cooling, heating and heating and cooling Groove shape, location, installation position of the heating element.