High-strength hot nozzle flow guide sleeve

Abstract

A high-strength hot nozzle flow guide sleeve is composed of a round table and a frustum. A communicated runner is arranged in the center of the round table and the frustum. A transition portion is arranged at the tail end of the frustum to be connected with the round table. The transition portion is formed by connecting a large R corner and an inclined side, wherein one end of the large R corner is connected with the tail end of the frustum, and one end of the inclined side is connected with the round table. By means of the structure improvement, the high-strength hot nozzle flow guide sleeve effectively avoids the problem that the flow guide sleeve cracks due to stress concentration, prolongs service life and avoids material accumulation, overflowing and carbonization.

Description

technical field [0001] The invention belongs to the field of hot runner systems, and relates to a high-strength hot nozzle guide sleeve for the hot runner system. Background technique [0002] Hot nozzle structure of high-strength diversion sleeve. The structure of the hot nozzle with a diversion sleeve is: the front end of the hot nozzle is equipped with a diversion sleeve, which is then assembled to the mold as a whole. For example, in the needle-valve hot runner system, since the guide sleeve is installed, the valve needle will not directly contact the gate of the mold, and some injection molding materials are acidic or corrosive, so the guide sleeve can Effectively protect the valve needle and gate part of the mold, so as to increase the service life of the mold. [0003] At present, commonly used hot nozzle guide sleeves such as figure 1 As shown, the diversion sleeve 1 is composed of a truncated cone 2 and a truncated cone 3. The center of the truncated cone 2 and t...

AI Technical Summary

Problems solved by technology

[0003] At present, commonly used hot nozzle guide sleeves such as figure 1 As shown, the diversion sleeve 1 is composed of a truncated cone 2 and a truncated cone 3. The center of the truncated cone 2 and the truncated cone 3 is provided with a flow channel 4 communicating with it. Viewed from the cross section, the end of the truncated cone 3 in contact with the truncated cone 2 There is a small R angle 5 transition, the small R angle 5 is only 0.5°, the wall thickness of the R angle transition is only 2.9mm, and in the process of use, the stress is easy to concentrate on the R angle transition, due to the thicker wall Thin and not strong enough, which often makes the diversion sleeve easy to break here; the service life is short

In addition, since the R angle transition is a dead angle, the remaining material overflowing here is easy to accumulate and carbonize

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