Comparison of hot runner systems and cold runner sytems in plastic injection molding process

Plastics industry is one of the fastest growing industries in the world too. These technological advances have increased the importance of increasing the volume of the mold hot runner systems used in the light. Hot runner system is cold runner plastic injection molding in recent years (normal gating) began to be more preferred by the system. Plastic injection more than cold runner's preference for hot runner molding of high quality products appetite, in a shorter time as the reduction of labor costs and do more work can be summarized in a brief manner. Elements used in cold runner system: the sprue bushing and are runner distribution system. Components used in hot runner systems; Thermocouple (temperature control elements), Temperature Controllers, Heaters (Distributor and nozzle heaters), hot runner nozzle and hot runner distributor (manifold), open / shut-off (valfgat A) gating input terminals can be divided into six main groups. Hot runner system; Until the molten plastic injection mold plastic injection mold plastic injection molding machine out from the nozzle temperature, pressure loss and damage of the controlled system is a form of waiting and request injected into the eye pattern. Hot runner system; Until the molten plastic injection mold plastic injection mold plastic injection molding machine out from the nozzle temperature, pressure loss and damage of the controlled system is a form of waiting and request injected into the eye pattern. Significant energy of the hot runner system, besides increasing the use of labor and material gain is due to bring many advantages. As well as the advantages of the hot runner system has its own characteristics and requirements. Improve the quality and production of plastic injection molded parts is the most effective method to optimize. This system is basically a continuation of the injection molding machine nozzle and distributor tasks to each eye sees the mold. In the hot runner system, all pressure will drop and the machine will wear out less machine life is extended. The increase in the number of products purchased per minute, decrease labor costs, lack of printing problems, and most importantly recycle used (break) they eliminate the consumption allowances are provided huge financial savings. The hot runner system is increased by approximately 20% the capacity of a molding machine. To this end, this thesis by making comparison of current practices will be explained by the requirements of a new generation of comparative application system design