Improved structure for sprayer of injection molding machine

Abstract

The invention discloses an improved structure for a sprayer of an injection molding machine. The improved structure comprises a sprayer body and a sprayer runner which is arranged in the sprayer body and communicated with the two ends of the sprayer body, wherein a threaded connection part is arranged on the outer surface at the rear end of the sprayer body; a nozzle is arranged at the front end of the sprayer body and communicated with the sprayer runner by a material discharging passageway; a heating device is arranged between the sprayer and the threaded connection part on the outer circumference of the sprayer body and comprises a heating coil; and the heating coil is connected with a high-frequency induction heater. The sprayer is provided with the heating coil, and when the sprayer is used, the high-frequency induction heater makes the coil generate an alternating magnetic field, so that eddy current and magnetic hysteresis loss are generated in the sprayer, the temperature of the sprayer is raised by generated heat, and the temperature rise of the sprayer can be controlled by adjusting the power of the high-frequency induction heater. Therefore, temperature can be adjusted according to the raw material melting condition in the sprayer, the molten raw material in the sprayer can be maintained in a proper state, and molding quality is ensured.

Description

technical field [0001] The invention relates to an improved structure of a spray head of an injection molding machine. Background technique [0002] The working process of the injection molding machine is that firstly, the granular or powdery plastic is added into the barrel, and the plastic becomes molten through the rotation of the screw and the heating of the outer wall of the barrel, and then the machine closes the mold and moves the injection seat forward to make the nozzle close The sprue of the mold, and then the pressure oil is passed into the injection cylinder, so that the screw is pushed forward, so that the molten material is injected into the closed mold with a lower temperature at a high pressure and a faster speed, and after a certain period of time and the pressure is maintained , Cool, make it solidify and form, and then the mold can be opened and the product can be taken out. After the outer wall of the barrel is heated, the molten raw material will stay i...

AI Technical Summary

Problems solved by technology

After the outer wall of the barrel is heated, the molten raw material will stay in the nozzle for a period of time until it is finally injected into the mold from the nozzle, so the temperature will drop, which will affect the molding quality

Images