Needle valve type hot nozzle

Abstract

The invention discloses a needle valve type hot nozzle which comprises a body, a connecting line A and a connecting line B are arranged outside the body, the end of the connecting line B is connected with a heating wire, the heating wire is wound from one end of the body to the other end of the body, and the heating wire is intensively wound at the two ends of the body. A connecting wire A is arranged in the middle of the body, a single-circle heating wire is wound in the middle of the body, a temperature sensing wire is connected to the end of the connecting wire A, the temperature sensing wire is wound at the discharging end of the body, and the temperature sensing wire and the heating wire located at the discharging end of the body are distributed in a staggered mode; through the designed temperature sensing line, temperature measurement can be formed at the discharging end, the temperature of hot melting plastic at the discharging end can be conveniently detected in real time, the heating temperature is accurately adjusted according to the detection result, the phenomenon that the temperature is insufficient or too high in existing machining is avoided, and the defects in an existing structure are overcome.

Description

technical field [0001] The invention belongs to the technical field of injection molding equipment accessories, and in particular relates to a needle valve type hot nozzle. Background technique [0002] In injection molding equipment, the hot-melt plastic needs to be sprayed out through a special hot nozzle and injected into the cavity of the mold to complete the processing. Among them, the performance of the hot nozzle affects the performance of the finished product. [0003] The existing needle-valve hot nozzle structure has average temperature control performance. During the process of hot-melt plastic discharge, its own temperature will drop, and the temperature of the hot-melt plastic cannot be detected. The injection volume is low and it is easy to produce Shearing the shot pattern, and because the outlet of the discharge pipe is far away from the heating wire, it is impossible to maintain a constant hot melt. At this time, the discharge will cause the outlet of the d...

AI Technical Summary

Problems solved by technology

[0003] The existing needle-valve hot nozzle structure has average temperature control performance. During the process of hot-melt plastic discharge, its own temperature will drop, and the temperature of the hot-melt plastic cannot be detected. The injection volume is low and it is easy to produce Shearing the shot pattern, and because the outlet of the discharge pipe is far away from the heating wire, it is impossible to maintain a constant hot melt. At this time, the discharge will cause the outlet of the discharge pipe to become smaller, and it is easy to melt in the subsequent hot-melt plastic. Driven by injection of solidified plastic into the mold, affecting product quality

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