Cold runner molds are often used for different plastic injection mold processes. Heated plastic is cooled before it passes from the nozzle to the cavity. Once it is through this part of the process, both the part and the material are ejected from the system. Compared with the hot runner mold process, cold runner molds area considerably cheaper and simpler alternative for smaller projects.
Components and Process The average cold runner system can have either two or three plate molds. In two plate systems, there is a parting line that divides the mold in two. Systems that have three plates have two of these lines so that the mold splits into three different sections once the part is ejected. Though more difficult, three plates offer more flexibility, as well as having more gates when directed by the final requirements. Things to Consider When you begin with cold runner molds, here are some additional things to consider:
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