Hot runner is through the heating method to ensure that the plastic of the runner and gate to maintain the molten state, because of the heating rod and heating ring near or in the center of the runner, the entire runner from the outlet of the barrel of the injection molding machine to the gate is in a high temperature state, so that the plastic in the runner keeps melted, after the shutdown generally do not need to open the runner to take out the condensate, and then start the machine only need to heat the runner to the required temperature. In short, the hot runner is an extension of the barrel of an injection molding machine.
