ES445158A1 - Procedure of plastic molding by injection. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Method of molding plastics by injection, characterized in that it includes the phases of: creation of a molding cavity, provided with two injection holes, at least, that perform two different functions and are arranged substantially forming a right angle between them; the injection of a primary molten compound into the interior of said mold cavity and through at least one of said holes, simultaneously injecting, and through, at least one of the two above mentioned types of injection orifices, a secondary molten compound, also inside said mold cavity; wherein said fused compounds, primary and secondary, have different characteristics or physical and/or chemical properties; the pressurization of said melted compounds, both primary and secondary, in order to cause the respective flow of both inside said mold cavity; the intimate intermixing of said fused compounds, primary and secondary, along a transition zone, located between both, where said transition zone has an indeterminate width; and the hardening of said melted compounds, primary and secondary, and of said transition zone constituted between both, within said mold cavity, until forming an injected plastic product made in one piece, of a unitary structure and that presents specific properties, previously determined, in certain areas of the piece. (Machine-translation by Google Translate, not legally binding)