Plastic mold design elements

① Parting surface, that is, the contact surface where the die and the punch cooperate with each other when the mold is closed. The selection of its position and form is affected by factors such as product shape and appearance, wall thickness, molding method, post-processing technology, mold type and structure, demoulding method, and molding machine structure.

② Structural parts, that is, sliders, inclined tops, straight tops, etc. of complex molds. The design of structural parts is very critical, which is related to the life of the mold, processing cycle, cost, product quality, etc. Therefore, the design of complex mold core structures requires a higher comprehensive ability of the designer, and the pursuit of simpler, more durable and more economical Design.

③Mould precision, that is, card avoidance, fine positioning, guide pillars, positioning pins, etc. The positioning system is related to the appearance quality of the product, the quality and life of the mold. According to the different mold structures, different positioning methods are selected. The positioning accuracy control mainly depends on processing. The internal mold positioning is mainly considered by the designer to design a more reasonable and easy-to-adjust positioning Way.

②Gating system, that is, the feeding channel from the nozzle of the injection molding machine to the cavity, including the main channel, the runner, the gate and the cold material cavity. In particular, the selection of the gate position should be conducive to the molten plastic filling the cavity in a good flow state, and the solid runner and gate cold material attached to the product are easy to be ejected from the mold and removed when the mold is opened (heat flow except Daomo).

③Plastic shrinkage and various factors affecting the dimensional accuracy of products, such as mold manufacturing and assembly errors, mold wear, etc. In addition, when designing compression molds and injection molds, the matching of process and structural parameters of the molding machine should also be considered. Computer-aided design technology has been widely used in plastic mold design.