On the difference between Zhenfei mold with cold runner runner

2021-3-18
Runner by heating approach to ensure the flow channel and the gate remains molten plastic. Hot runner system generally consists of several parts of the hot nozzle, manifold, temperature control boxes and other components and accessories. Hot nozzle generally include two types: open-end hot nozzle and nozzle needle heat. Because hot runner nozzle system used will determine the form and mold manufacturing, which often corresponding hot runner system into an open system and a needle-type runner runner systems.    

Cold runner system each time the mold will be wasted, in the injection molding parts, multi-cavity cold runner system will cause a lot of waste material, which makes the molding's profit margins were seriously damaged. Advantages cold runner is easy to use, but also to satisfy certain aesthetic requirements. Cold runner injection to be used to reduce the transmittance of transparent acrylic or polycarbonate and other parts, to avoid the effect of the injection causing visible in some parts of the strip.    

As for the disadvantages of cold runner, in addition to the waste of raw materials, the defect cold runner, including the entire automated or manual process to add a step. The cold runner mold is removed from the part, these workers need a robot or a portion of the flow channel separated. According to the size of the flow channel, the value of the waste is likely to reach hundreds of thousands of dollars, especially for expensive materials such as polycarbonate.   

As for the disadvantages of cold runner, in addition to the waste of raw materials, the defect cold runner, including the entire automated or manual process to add a step. The cold runner mold is removed from the part, these workers need a robot or a portion of the flow channel separated. According to the size of the flow channel, the value of the waste is likely to reach hundreds of thousands of dollars, especially for expensive materials such as polycarbonate.