Injection molding nozzle for three separate materials

Dispensing – Plural sources – compartment – containers and/or spaced jacket – With discharge assistant for each source

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222145, 425130, B29E 103

Patent

active

039762262

ABSTRACT:
The invention relates to apparatus for the manufacture by injection molding of articles composed of a plurality of layers of at least three distinct materials coated one over the other, in which there is injected a measured quantity of a first material adapted to form the skin of the article, a measured quantity of a second material to form the intermediate layer, and a measured quantity of a third material to form the body of the article, the materials being introduced into the mold coaxially so as to give a uniform distribution. The injection-molding apparatus includes an injection nozzle having a single discharge channel opening on the side of the mold and at least three coaxial chambers each connected to a separate supply circuit for each material to be injected. The invention is especially applicable to the production of articles in which the external and internal materials are joined together by an intermediate material.

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