Why were deformation and warpage happened?
Main causes : 1. Defects of designs in molding products. 2. The effects from the residual pressure. 3. Different parts of products molding have different shrinkages. 4. Caused from outside pressure after injection. Molding conditions, and injection machines (Solution 1) : 1. Raise the injecting temperature and lower the injecting pressure. 2. Speed up the injecting speed. 3. Lower the molds temperature. 4. Reduce the secondary pressure, reduce the pressure holding time, and extend the cooling time. 5. Readjust the piping, the cooling-water volume, the temperature, and make even the cooling speed in molding products. 6. Remove the unreasonable conditions in releasing and ejecting molds. Designs in molding products and models (Solution 2) : 1. Consider the symmetry problems in Mechanics. 2. Reduce its orientation in design. 3. Reinforce its support, and decrease its pressure. 4. Make the gates smaller, and increase the number of gates. 5. Change the ejecting method. Materials (Solution 3
