Hot runner hot nozzle assembly capable of directly changing color

Abstract

The invention discloses a hot runner hot nozzle assembly capable of directly changing color, comprising a hot nozzle tip and an alien nut. The hot runner hot nozzle assembly is characterized in that the hot nozzle tip comprises a main body and a mouth tip, wherein the main body is provided with a straight runner; the nozzle tip is provided with plural sub-runners communicated with the straight runner; the outlets of the sub-runners are positioned on the root of the mouth tip; the surface of the mouth tips on the outlets is a concave annular transition arc surface; the alien nut is sheathed onthe hot nozzle tip; the front end of the inner cavity of the alien nut is matched with the main body of the hot nozzle tip; and the inner surface of the tail end is an inner annular inverse conical surface. The outlets of the sub-runners are positioned on the root of the mouth tip, the corresponding position surface is transited in concave annular transition arc surface, the reflecting countercurrent of fusion plastic washes the mouth tip surface, and thus the fusion plastic of the imperforate position of the mouth tip root part is taken away in time so as to thoroughly solve the problem of bank in the mouth tip; product color impurity is reduced, color changing operation is simple, quick and through, raw material waste is reduced, and production efficiency and product quality can be improved.

Description

technical field [0001] The invention relates to the technical field of hot runner molds, in particular to a hot runner nozzle assembly capable of directly changing colors. Background technique [0002] Hot runner molds are currently commonly used plastic material injection molding molds. Compared with molds with cold runner structures, they have the advantages of saving raw materials, shortening the molding cycle of parts, reducing waste products, improving product quality, eliminating subsequent processes, and contributing to production automation. . However, at present, there are certain deficiencies in the design of the hot nozzle structure, causing the molten plastic to easily stay in the dead corner of the nozzle tip of the hot nozzle (such as figure 1 The corner A) in the center of the nozzle turns yellow and black after a long time of heating, which affects the color purity of the injection molding; when replacing plastics of different colors, it is also necessary to...

AI Technical Summary

Problems solved by technology

However, at present, there are certain deficiencies in the design of the hot nozzle structure, causing the molten plastic to easily stay in the dead corner of the nozzle tip of the hot nozzle (such as figure 1 The corner A) in the center of the nozzle turns yellow and black after a long time of heating, which affects the color purity of the injection molding; when replacing plastics of different colors, it is also necessary to discharge a large amount of new color plastics to remove the original color plastics that remain on the tip of the nozzle, sometimes even Even if a large amount of new raw materials are discharged, it is difficult to completely remove the raw materials in this dead corner.

This not only causes waste of raw materials, but also affects production efficiency and product quality.

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