Many factors in the mold forming stage affect the quality of the finished product
In the process of injection molding, whether the quality and accuracy of the finished product of the mold meet the requirements is the most important thing. The molded mold must meet the requirements of size, accuracy and shape, but the injection molding process will be inconsistent due to the difference in heat and shrinkage. , So this process should be handled carefully.
Improper injection mold or design will directly affect the shrinkage rate of the plastic, because the size of the plastic product plus the estimated shrinkage rate obtained, and the shrinkage of the injection mold cavity is processed by the numerical value of the plastic injection molding or the plastic is recommended to produce the range Inside, this not only forms the injection mold, but also involves the distribution, shape and orientation of the crystalline engineering plastics (anisotropic), plastic products, size and distance to the gate at the gate location at the relevant location of the gate. The role of plastic shrinkage is mainly heat-resistant shrinkage, shrinkage phase, direction shrinkage, and elastic recovery compressibility shrinkage, and these factors are related to the molding conditions or the operating conditions of precision injection molded parts of related articles.
Because injection molding is a process of changing the raw material from powder or another form, there will be multiple steps between them, and high temperature melting and fusion are required. When these steps are mutually advanced, the resulting form of the material is changed. Anything that needs to go through this step can affect the physical properties, size, quality, and appearance.