Spray nozzle for injection molding machine

Abstract

The invention discloses a spray nozzle for an injection molding machine. The spray nozzle comprises a spray nozzle body, wherein the spray nozzle body comprises a front spray nozzle body and a rear connector; a screw joint hole is formed in the middle of the front end surface of the rear connector; the rear end of the front spray nozzle body is in screw joint in the screw joint hole; the rear end of the rear connector is provided with a central through hole; the central through hole is communicated with the screw joint hole; the middle part of the front end surface of the front spray nozzle body is provided with a connecting column extending forwards; the connecting column is in screw joint on a spray nozzle head; the middle part of the spray nozzle head is provided with a spray nozzle hole; the middle part of the front spray nozzle body is provided with a flow cavity; the flow cavity comprises a front small-diameter section, a middle arc-shaped transition section and a rear large-diameter section; the rear end of the rear large-diameter section is provided with inner threads; the rear large-diameter section is communicated with the central through hole; and a middle valve body is in screw joint in the inner threads. According to the spray nozzle, the middle valve body is arranged in the flow cavity, so that a buffer spring is arranged inside, and therefore, material spraying effect is improved by arranging an electric heating sleeve on the outer part of the front spray nozzle body, and cold materials are prevented from being jammed.

Description

Technical field: [0001] The invention relates to the technical field of injection molding machine accessories, in particular to a nozzle for an injection molding machine. Background technique: [0002] The material melting of the injection molding machine is realized through the melt barrel assembly. To produce uniform injection molding products under a certain back pressure, especially for the injection molding of plastic materials with good fluidity, if you want to control the melt and clean the flow, spring nozzles are generally used to control the melt. However, the existing external spring nozzles are prone to cold material because the exposed spring section of the spring cannot be added with a heating coil, especially for nozzles with larger diameters or longer nozzles. At the same time, each part of the existing spring nozzle cannot be disassembled, which makes its cleaning troublesome, and after damage, it can only be replaced with a new one, and part of it cannot b...

AI Technical Summary

Problems solved by technology

However, the existing external spring nozzles are prone to cold material because the exposed spring section of the spring cannot be added with a heating coil, especially for nozzles with larger diameters or longer nozzles.

At the same time, the various parts of the existing spring nozzle cannot be disassembled, which makes its cleaning troublesome, and after damage, it can only be replaced with a new one, and part of it cannot be replaced and repaired, which increases the maintenance cost

Images