Controlling accurate dimensions in injection plastic molding of bulk products involves several key considerations:
1.Mold design and manufacturing
The design and manufacturing of molds are important factors affecting the dimensional accuracy and surface finish of injection molded products. During the mold design and manufacturing process, factors such as the shape, size, material, and surface quality of the product need to be fully considered, and mold materials and manufacturing processes should be reasonably selected based on actual needs. In addition, it is also necessary to pay attention to the maintenance and upkeep of the mold and replace worn parts in time to ensure the accuracy and stability of the mold.
2.Injection molding parameter adjustment
During the injection molding process, the adjustment of injection molding parameters is very important to the control of product dimensional accuracy and surface finish. Injection molding parameters include injection molding temperature, injection molding pressure, injection speed, pressure holding time and other factors. Different products require different injection molding parameters for adjustment. The right injection molding parameters can make the molten plastic fill the mold cavity evenly. It is neccessary to avoid problems like thermal stress and weld marks, and ensure the dimensional accuracy and surface finish of the product.
3. Material selection
Different plastic materials have different fluidity, shrinkage and stability. It is important to use the right plastic material in ensuring product dimensional accuracy and surface finish. Factors such as the shape and size of the product, process requirements, environmental adaptability are needed to be considered. Choose a high-quality and consistent material that meets the specifications of the final product.
4.Quality control
During the injection molding process, it is also necessary to strengthen product quality control and promptly detect and deal with existing quality problems. For example, high-precision measuring instruments are used to detect product dimensions and surface finish, and injection molding parameters and molds are adjusted in a timely manner to avoid the expansion of existing problems. At the same time, a complete quality management system needs to be established to verify and maintain the accuracy of the molded products.