What is the definition of hot runner in injection mold?

A Hot Runner system is a heating component system used in injection molds to inject melted plastic particles into the cavity of the mold. Hot runner mold is a new mold structure that heats the runner and runner of the traditional mold or the three-plate mold, so that the runner and runner do not need to be taken out during each forming. Second, the working principle of the hot runner by heating to ensure that the runner and gate of the plastic to maintain a molten state. Since there are heating rods and heating rings near or in the center of the flow path, the entire flow path from the nozzle outlet of the injection molding machine to the gate is in a high temperature state, so that the plastic in the flow path can always remain molten. Therefore, after shutdown, it is generally not necessary to open the runner to take out the condensate, and then restart the runner to heat the required temperature to continue production. Type and characteristics Type: hot runner system is divided into adiabatic runner and micro semi-hot runner system. Features: Material saving: Because the hot runner mold does not need to remove the runner and runner when forming, it can greatly reduce the waste of plastic raw materials. Improve production efficiency: The hot runner mold can reduce the number of mold opening and closing, thereby shortening the production cycle and improving production efficiency. Improve product quality: The hot runner mold can ensure that the plastic remains molten during the flow process, thereby avoiding quality problems caused by plastic cooling. Application: Hot runner mold is widely used in the production of various plastic products, such as disposable tableware, bottle caps, bottle cap anti-theft buckle and handle and other small mass products. Development: Stacked hot runner mold is an important development direction of hot runner mold. The stack mold can effectively increase the number of cavities, and the requirement of the injection machine closing force only needs to increase by 10% to 15%. Stacked hot runner molds have been used in industrialized production in some developed countries abroad and in China