ES430545A3 - Improvements in molding appliances by injection. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improvements in injection molding apparatus, characterized in that each unit is provided with separable units disposed against one another, the units defining a series of cavities, at least part of each cavity being located within the peripheral limits of the first unit, presenting the second unit a series of pouring holes therethrough to feed moldable material to my corresponding cavities, a hollow member open at at least one end and defining a chamber in which the mouldable material is limited, the end being disposed opening of the hollow member against a surface of the second unit and covering a surface corresponding to the pouring holes with the chamber that is interconnected by the pouring holes with all the cavities, a piston in the chamber and means for performing a relative movement between the hollow member and the piston that forces the moldable material that is in the chamber to pass through the pouring holes into the cavities simultaneously applying pressure through the mouldable material to the surface of the second unit, each portion of the second unit covering any of the cavities and being locally flexible relative to any another portion of the second unit covering any other cavity, by the pressure of the mouldable material acting on the outer surface of the covering portions, so that each of the covering portions can move substantially independently by the pressure of the mouldable material to be able to eliminate the unevenness between the corresponding surfaces of said units and to provide a hermetic seal between the corresponding surfaces surrounding each cavity, thereby eliminating the formation of burrs between said corresponding surfaces. (Machine-translation by Google Translate, not legally binding)