What should Plastic Injection Mold design pay attention to?
1. Plastic shrinkage rate and the factors that affect the dimensional accuracy of products, namely, Plastic Injection Mold manufacturing and assembly error, Plastic Injection Mold wear, etc.The matching of process and structural parameters of molding machine should be considered when designing molding die and injection die.
2. The precision of Plastic Injection Mold, that is, avoid the card, precise positioning, guide column, positioning pin, etc.Positioning system is related to the appearance quality of products, the quality and life of Plastic Injection Mold, according to the different structure of Plastic Injection Mold, choose different positioning methods, positioning precision control mainly depends on processing, internal mold positioning is mainly the designer to fully consider, Design a more reasonable and easy to adjust positioning mode.
3. Structural parts, that is, the slider, the inclined top, the straight top block of the complex mold.The design of structural parts is very key, related to the life of Plastic Injection Mold, processing cycle, cost, product quality, etc., so the design of complex mold core structure requires higher comprehensive ability of designers, as far as possible to pursue more simple, more durable, more economic design scheme.
4. Parting surface, that is, the contact surface of the concave die and the punch die when the die is closed.The selection of the location and form of parting surface is affected by the shape and appearance of the product, wall thickness, molding method, post-processing technology, type and structure of Plastic Injection Mold, demoulding method and structure of the molding machine.
5. The pouring system, that is, the feed channel between the nozzle of the injection molding machine and the cavity, including the main channel, the shunt channel, the gate and the cold hole.In particular, the location of the gate should be selected to help the molten Plastic fill the cavity in a good flow state. The solid runner attached to the product and the gate cold material are easy to ejection and remove from the Plastic Injection Mold when opening the mold (except the hot runner mold).