How to reduce the error of mold cavity size
Mold cavity size error is a common problem that affects product quality and accuracy. Mold cavity size error refers to the deviation between the actual size of the mold cavity and the designed size. There are many factors that cause mold cavity size errors, such as material shrinkage, molding conditions, mold design, mold wear, etc.
In terms of materials, we can choose materials with low shrinkage and stable performance, such as metal or engineering plastics. Adjust the mold design based on the shrinkage of the material and add appropriate compensation to the mold cavity size. Control molding temperature, pressure, and time to reduce the impact of thermal expansion and cold contraction on the material shrinkage.
During molding, the molding conditions are perfected based on material properties, mold design and product requirements, and kept consistent during the production process. Increase injection pressure and speed, improve material filling and pressure holding, and reduce air pockets and short shots. Increase the holding pressure and time to compensate for the shrinkage of the material and ensure the dimensional stability of the product.
Therefore, we need to take appropriate measures to control and reduce mold cavity size errors from factors such as material shrinkage, molding conditions, mold design, mold wear, etc.