(1) the number of cavities and arrangement. When plastic product design is complete and the material used is selected, you need to consider is to use a single-cavity or multiple cavities molds. Determined taking into account the number of mold cavity: 1 plastic product quantities and delivery cycle. 2 plastic mould quality control requirements. 3 forming the plastic varieties and the shape and size of the plastic parts. 4 the cost of plastic. 5 cavity layout.
(2) the parting surface choices. Parting surface plastic parts should be chosen at the maximum outline shape; determine how beneficial are retained to facilitate smooth part release; ensure the accuracy of the workpiece meets the plastic parts of look requires; easy to mold manufacturing and to improve the effect of exhaust and to side core-pulling.