Different mainstream channelsHot runnerThe working principle is different. The following mainly introduces the working principles of two plastic molds with hot runner systems:

One. The working principle of the plastic mold for the valve rubber port hot runner system.

The plastic mold structure of the valve rubber port hot runner system is the most complex, and its structure is the same as that of a regular multi head hot runner system's plastic mold structure. In addition, a set of valve needle transmission device has been added to control the opening and closing motion of the valve needle. The transmission device is equivalent to a hydraulic cylinder. The hydraulic device of the injection molding machine is connected to the mold to form a hydraulic circuit, which realizes the opening and closing movement of the valve needle and controls the injection chamber of the molten plastic.

2、 The working principle of a plastic mold with a single hot runner system.

The single end hot runner system mainly consists of a single nozzle, nozzle head, nozzle connecting plate, temperature control box system, etc. The single ended hot runner system has a simple plastic mold structure. The molten plastic is injected into the connecting plate of the nozzle by an injection molding machine. After the nozzle reaches the nozzle head, it is injected into the cavity.

Control the dimensions D, D, and L of the nozzle connecting plate, so that the fixed mold fixing plate is pressed against the end face of the nozzle connecting plate, control the axial displacement of the nozzle, or directly use the injection molding machine nozzle to support the end face of the nozzle connecting plate. To achieve the same goal. A lead slot is set at the appropriate position of the fixed template to extract the power cord from the mold and connect it to the wiring board installed on the mold.