Plastic injection molding product shrinkage problem
2023-12-09
Plastic injection molding product shrinkage problem refers to the phenomenon that the size of the product shrinks or the appearance of the product shrinks in the process of plastic injection molding. This problem may lead to the product does not meet the design requirements or affect the appearance of the product, can not be used normally. 
The main reasons for the shrinkage of plastic products are as follows: 1. Improper material selection: Plastic materials with poor thermal stability and large shrinkage rate are selected, which are prone to shrinkage problems. 2. Unreasonable injection process parameters: improper setting of injection temperature, pressure, injection speed and other process parameters will lead to excessive shrinkage of the product. 3. Mold and product structure design problems: unreasonable product structure design, such as uneven product wall thickness, unreasonable product structure, etc., will lead to product shrinkage. 4. Poor mold temperature control: too high or too low mold temperature will affect the shrinkage rate of the product, which will lead to shrinkage problems. 
There are the following ways to solve the problem of shrinking plastic injection products: 1. Choose the right plastic material: Select the right plastic material according to the requirements of the product, considering its thermal stability and shrinkage rate and other factors. 2. Reasonable adjustment of injection molding process parameters: according to the specific situation, adjust the injection temperature, pressure, injection speed and other parameters to control the shrinkage rate of the product. 3. Optimize mold and product design: Optimize the design of products and molds to ensure uniform wall thickness, reasonable structure and reduce shrinkage problems. 4. Control mold temperature: reasonably control mold temperature to ensure the balance of melting, flow and cooling process of plastic materials during injection molding. In short, to solve the problem of plastic injection mould products need to comprehensively consider material selection, process parameter adjustment and product and mold structure design and other factors, through reasonable control and optimization, can effectively solve the problem of product shrinkage.
