Hot nozzle main body

Abstract

The invention discloses a hot nozzle main body including a hot nozzle body, a groove and heating wires. The groove is helically arranged on the outer periphery of the hot nozzle body, and the groove is internally wound with the heating wire; the hot nozzle body comprises a small-diameter portion and a large-diameter portion; the rear end of the small-diameter portion is arranged on the front end of the large-diameter portion; the length of the small-diameter portion is at least 4 / 5 that of the hot nozzle; a portion close to the rear end of the small-diameter portion is additionally provided with an encryption groove, the density of the encryption groove is at least 2.5 circle / cm, and the encryption groove is internally wound with the heating wire. The design can reduce a difference between two-end temperatures and a middle part temperature of the hot nozzle body, improves the problem that non-smooth glue output is generated due to the non-uniform hot nozzle internal temperatures; and at the same time, the axial distance of the small-diameter portion at the front end of the hot nozzle body is lengthened, so that the temperature-rising rate of the hot nozzle can be accelerated, and the work efficiency is improved.

Description

technical field [0001] The invention relates to a hot nozzle main body with fast heating speed and small temperature difference, which can effectively improve the problem of unsmooth glue discharge. Background technique [0002] The hot runner system is an important part of the injection mold production equipment. It uses the principle of heating and temperature control to keep the material in a molten state inside the runner of the mold. With the development of the mold industry, the hot runner system is also increasingly developed. A hot nozzle main body in the hot runner system in the prior art, such as figure 1 As shown, the number of groove turns in the middle area of ​​the outer circumference of a hot nozzle body 1 is relatively small, and the density is 2.5 turns / 10cm. Correspondingly, the number of turns of the heating wire installed in the groove 2 is also relatively small, resulting in There is a large temperature difference between the two ends and the middle of ...

AI Technical Summary

Problems solved by technology

A hot nozzle main body in the hot runner system in the prior art, such as figure 1 As shown, the number of groove turns in the middle area of ​​the outer circumference of a hot nozzle body 1 is relatively small, and the density is 2.5 turns / 10cm. Correspondingly, the number of turns of the heating wire installed in the groove 2 is also relatively small, resulting in a There is a large temperature difference between the two ends and the middle of the hot nozzle, and the temperature difference can even reach 100 degrees. The molten material is heated unevenly in the hot nozzle, which greatly affects the glue output effect. The length of the nozzle is relatively long, and the length accounts for 2 / 5 of the nozzle body, which slows down the heating speed of the nozzle

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