Effectiveness of Hot Runner Injection Mould Compared toCold Runner Injection Mould for Process Optimization

Abstract

The major parts of injection moulding are core-cavity plate, runner and gate systems. Runner system plays an important role in scrap quantity and quality of product. Two types of runner systems namely cold and hot runner systems are in practice. A hot runner system is an assembly of heated components used in plastic injection molds that inject molten plastic into the cavities of the mold. By contrast, a cold runner is simply a channel formed between the two halves of the mold, for the purpose of carrying plastic from the injection molding machine nozzle to the cavities. In cold runner system component is ejected along with the runner which creates the waste. Concealed box used for the casing of electrical switches is used for analysis purpose. The component is manufactured by both hot and cold runner systems to compare the design and simulation in both cases for the process optimization through scrap reduction, cost analysis and defects