Injection molding will be affected by many related factors and environmental conditions, and the basic factors are plastic materials, injection mold, injection process and injection equipment. In the early stage of designing plastic products, the engineering plastics that can be needed are selected according to their environment. Secondly, the appropriate injection molding machine should be selected according to the selected plastic materials, finished product dimensional accuracy, product weight, quality requirements and expected mold structure.
What are the factors that affect the precision injection molding of Jinan mould?
Among the related factors affecting precision injection molding, mold is the key to obtain precision plastic products that meet the quality requirements. Mold design, mold design is reasonable will directly affect the quality of plastic products.
Because the mold cavity size of Jinan is derived from the required size of plastic products and the shrinkage rate of the materials used, and the shrinkage rate is often a value within a range recommended by the plastic manufacturer or the engineering plastics manual. It is not only related to the mold gate form, gate position and distribution, but also related to the crystalline orientation (anisotropy), shape and size of the engineering plastics It is related to the distance and position of the gate.
The main factors affecting the shrinkage of plastics include thermal shrinkage, phase change shrinkage, orientation shrinkage, compression shrinkage and elastic recovery, which are related to the molding or operating conditions of precision injection molded products.
Therefore, mold designers must have rich experience in design and injection molding, and must consider the relationship between these factors and injection molding conditions and their apparent factors, such as injection pressure and cavity pressure and filling speed, injection melt temperature and mold temperature, mold structure and gate form and distribution, gate cross-sectional area, product wall thickness, reinforced filler content in plastic materials And the crystallinity and orientation of plastic materials.
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