The needle valve type hot runner hot nozzle relies on two different ways to drive the valve needle: pneumatic drive and hydraulic drive. In addition, there are three types of single point needle valve hot runners without a splitter plate. The gate is usually on the surface of the product and also comes with pneumatic or hydraulic drive equipment, such as cylinders (oil cylinders) and pistons. Therefore, the processing requirements for the mold are relatively high, and the plate thickness requirements are also different, making the structure relatively complex, Usually used on large injection molded parts, there are also hot to cold and full heat constructions. Regarding the composition of parts and components, different types of hot runners have different compositions due to their different structures and gate methods.

For the needle valve type hot runner hot nozzle, it relies on the air pressure and oil pressure input through external electromagnetic signals to drive the valve needle for action sealing after the injection molding injection cycle is completed. Completely rely on its own air or oil pressure to drive the valve needle to complete the sealing and breaking of the adhesive. This is different from an open hot runner.

The needle valve type hot runner hot nozzle does not have a cooling time constraint of the runner system, so there is no cold runner. After the workpiece is formed and solidified, it can be ejected in a timely manner. Many thin-walled parts have a relatively short forming cycle, which saves time and costs. Due to the use of needle valves for accurate control of the production of precision parts. The formed parts have good gate quality, low residual stress after demolding, and small deformation of the parts.