How to deal with the shock pattern of insert injection molding products
In the actual production process of insert injection products, some quality problems will inevitably occur, such as swelling, bubbling, shock lines, etc. The causes and solutions for swelling and bubbling have been understood in the previous section. This article will introduce insert injection molding. How to deal with the shock pattern of the product to avoid unnecessary losses and save costs. On the surface of rigid plastic parts near the gate, dense corrugations are formed with the gate as the center, sometimes called shock waves. The reason is that when the melt viscosity is too large and the mold is filled in the form of stagnant flow, the material at the front end will quickly condense and shrink as soon as it touches the surface of the cavity, and the later melt expands and shrinks the cold material to continue the process. The continuous alternation causes the material flow to form surface vibrations as it advances. Solution: 1. Increase the temperature of the barrel, especially the temperature of the nozzle, and also increase the temperature of the mold. 2. Increase the injection pressure and speed to quickly fill the model cavity. 3. Improve the size of runners and gates to prevent excessive resistance. 4. The mold exhaust should be good, and a large enough cold material well should be set up. 5. Do not design the parts to be too thin. [Related recommendation] Learn more: 精の corporate culture Learn more: Continuous improvement and innovation are the key factors for the survival of stamping companies Learn more: Why most stamping factories are unwilling to quote foreign trade companies
