Hot runner technology is used in plastic injection mold runner system's advanced technology

Hot runner technology is used in plastic injection mold runner system and advanced technologies. Hot runner nozzle extension from the initial order to shorten the main channel in the form of a plastic surface condensation to use a thermal insulation principle, development become extinct hot runner nozzles and pit adiabatic nozzle and other forms. These forms , although , compared with the normal flow channel system each have advantages , but there are still some deficiencies are especially easy to salivation for some plastic materials ( such as nylon , etc. ) can not be applied better . With the advances in microelectronics technology , as well as mold temperature control machine development and use , to the hot runner temperature control and mold cooling to arbitrary control ,  Instrumentation ball valve  technology to advance to a new stage of development. Hot runner nozzle according to the different structure of the system can be divided into open and the valve gate nozzle nozzle . For valve nozzle has a variety of  2 way manifold  abroad , but domestic targeted research in this area is also very little. Based on this situation , the paper and its hot runner nozzle needle injection mold applications are discussed. 2 needle nozzle working principle and characteristics of needle-type nozzle is in the traditional open gate in the installation of the valve needle moves quickly to control opening and closing of the nozzle and cavity filling process .