Double-colour injection nozzle for injection machine

Abstract

The invention discloses a double-colour injection nozzle for an injection machine. The double-colour injection nozzle comprises a nozzle flange used for being fixedly connected with double adhesive-melting barrels of the injection machine, a sleeve and a nozzle body, wherein the interior of the sleeve is hollow, and the nozzle flange, the sleeve and the nozzle body form a nozzle housing with a cut-through interior; an adhesive-separating tube, an adhesive-passing ring, a distributor and a valve rod are further installed in the hollow interior of the sleeve; the distributor is installed between the nozzle and the adhesive-separating tube, and adhesive material inflowing holes communicated with an auxiliary runner and a main runner respectively are formed in the distributor; the adhesive-passing ring sleeves the outer wall of the junction of the distributor and the adhesive-separating tube, and a gap is formed in the outer wall of the junction of the distributor and the adhesive-separating tube and is capable of moving forwards and backwards to close the auxiliary runner; the valve rod comprises a connection leg and a head part, the connection leg is movably connected to the distributor in an insertion manner, and the head part is exposed out of the distributor, is accommodated in a valve rod chamber, and is capable of moving forwards and backwards to block the opening of the main runner. Melted adhesive materials in the main runner and the auxiliary runner of the double-colour injection nozzle disclosed by the invention cannot flow back; the double-colour injection nozzle is simple in structure and capable of achieving multi-way double-colour injection such as clear double-colour injection, mixed double-colour injection and interlayer injection.

Description

technical field [0001] The invention relates to the technical field of injection molding machines, in particular to a molten plastic injection nozzle used on an injection molding machine. Background technique [0002] At present, most of the nozzles of the existing color mixing injection molding machines simply mix the molten plastic from the two melt plastic barrels in the nozzle flow channel. Although a certain color mixing effect can be achieved, but in the color mixing process The two molten plastic materials will interfere with each other, and will cause backflow phenomenon, which will affect the color mixing effect of the plastic. In order to avoid the problem of rubber material backflow during the color mixing of the mixed-color injection molding machine, for example, the Chinese utility model patent (notification number CN201140498) discloses a mixed-color nozzle of an injection molding machine. The reverse valve is used to prevent the backflow of the molten rubber ...

AI Technical Summary

Problems solved by technology

Although the above-mentioned color mixing nozzle can solve the problem of molten rubber backflow, its structure is relatively complicated

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