Injection mold gating system, refers to the production of raw materials from the injection machine equipment nozzle device to the injection mold cavity inside all the plastic coagulation part. The two most common gating systems in production practice are the common runner gating system and the non-runner gating system. Cold runner is the most common one of the common runner, including the main runner structure, runner structure, gate structure and cold hole structure. The runner-less mold gating system is the hot runner mold gating system, which is characterized by the plastic has been kept in molten state.