What Should Pay Attention To In The Design Of Injection Molds?
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1, the plastic shrinkage rate and various factors affecting the dimensional accuracy of the product, namely the injection mold manufacturing and assembly errors, the injection mold wear and so on.
When designing compression molding and injection molding, it is necessary to consider the matching of the process and structural parameters of the molding machine.
2, the accuracy of injection mold, that is, avoiding cards, fine positioning, guide columns, positioning pins, etc.
The positioning system is related to the appearance quality of the product, the quality and life of the injection mold. According to the different structure of the injection mold, different positioning methods are selected. The positioning precision control mainly depends on the processing. The internal mold positioning is mainly designed by the designer to make the design more reasonable and easy to adjust. Positioning method.
3, the structural parts, that is, the slider of the complex mold, the inclined top, the straight top block and the like.
The design of the structural parts is very critical, which is related to the life of the injection mold, processing cycle, cost, product quality, etc. Therefore, designing the complex mold core structure requires higher comprehensive ability of the designer, and pursuing as simple as possible, more durable and more economical. Design plan.
4. The parting surface, that is, the contact surface where the concave mold and the convex mold cooperate with each other when the mold is closed.
The selection of the position and form of the parting surface is influenced by factors such as the shape and appearance of the product, the wall thickness, the forming method, the post-processing process, the type and structure of the injection mold, the demolding method and the structure of the molding machine.
5. The gating system, that is, the feeding channel from the nozzle of the injection molding machine to the cavity, including the main channel, the branching channel, the gate and the cold material hole.
