The role of injection mold processing and the consideration of product performance
The production of injection molding products, need to use injection molding molds, generally under normal circumstances, plastic products produced by this injection molding method, the surface has a better gloss and color, but sometimes it is inevitable that there will be some shortcomings, in addition to the material problems of the plastic itself, colorants and the gloss of the mold surface, what are the reasons for injection molding processing to cause such an impact?
(1) The mold finish is poor, there are rust stains on the surface of the cavity, etc., and the mold exhaust is not good.
(2) If there is a problem with the pouring system of the mold, the cold material well should be increased, and the flow channel, polishing main channel, diversion channel and gate should be increased.
(3) The material temperature and mold temperature are low, and the gate local heating method can be used if necessary.
(4) The injection molding processing pressure is too low, the speed is too slow, the injection time is insufficient, and the back pressure is insufficient, resulting in poor compactness and dark surface.
(5) Plastics should be fully plasticized, but to prevent the degradation of materials, heating should be stable, cooling should be sufficient, especially thick-walled.
(6) To prevent cold materials from entering the parts, switch to self-locking springs or reduce the nozzle temperature if necessary.
(7) Too many purchased materials are used, the quality of plastics or colorants is poor, mixed with water vapor or other impurities, and the quality of the lubricants used is poor.
(8) The clamping force should be sufficient.
1. The role of automatic reset of the fixed plate of the pusher of injection mold processing, installed near the reset rod, after the plastic mold product is pushed out, the pusher is pulled back to its original position to restore the role of the cavity.
2. The role of positioning, used for slider positioning in the lateral core pull, used with stops.
3. Auxiliary power of movable parts such as movable plates and runner push plates.
The spring used in the injection mold is generally round spring and rectangular spring, compared with the round spring, the rectangular spring has greater elasticity, the compression ratio is also larger, and it is not easy to fatigue failure, which is a more commonly used spring.
Injection mold processing quotation, mold injection molding processing design and mold manufacturing support the huge injection molding product development process, when customers need to provide mold and part cost quotation, which means that the detailed design stage of mold injection molding processing is about to begin.
Injection mold processing manufacturers give a fully detailed design, it should be noted that a large number of work in the early stage of mold injection molding processing design is carried out simultaneously with imperfect product design, and the later mold injection molding processing design may need to carry out a large range of points, so the designer can develop the first mold layout, and then carry out the old evaluation and improvement, if you want to accelerate product development to design and mold parts procurement customization at the same time.
Because of potential errors in the design of injection molded products, mold designers may be asked to redesign and point one-sided molds to determine whether the injection mold meets customer production requirements.