4 solutions for injection molding China in 2025
1, Filling the defect
It always shows incomplete filling or edge collapse. It will decide on a product, waste material, labor, and time. There is much possible reason: Such as nozzle temperature is too low, not enough supply, flowability not good. The injection pressure is low. The gate is too small or not right position, the mold surface is injection mould companies not smooth enough. The nozzle is blocked, venting problem
2, Flash or burr
It always happens in the parting line. It will increase the difficulty of machining or shape, even defective. The possible reason such as nozzle temperature too high, injection too much material, flowability is very good. Injection pressure too high, clamping force too small
3, Sink mark
It always caused by material shrink after injection molding. The possible reason such as nozzle temperature too high, resin supply not enough, shrinkage is too big. Injection molding pressure too low, holding time too short, injection speed too slow, mold temperature to plastic molding company high, cooling time too short, the thickness of the product is uneven, gate too small
4, Welding line
It always happens in a product that has holes or another shape. The possible reason such as nozzle temperature too low, the material is not dry up enough, injection speed is too slow, gate too small, venting is not good. Injection pressure too low or other reason
4 solutions for injection molding：
As we can see the types and causes of injection molding defects, almost every kind of defect is formed by the combined effects of many factors. All these reasons are performance and molding machines, molding material character, mold design structure and material, filling control systems, and injection molding plastics different operating processes related. Although injection molding technology development in some areas is very quick, technology is relatively mature. But accompanied by increasing difficulty defect control, which requires us to reduce and Troubleshoot plastic injection molding defects with the help of advanced theory and advanced technology tools.
