PROCEDIMIENTO Y CABEZAL INYECCION PARA LA FABRICACION DE UNARTICULO EXTRUSIONADO COMPUESTO DE AL MENOS DOS MATERIALES PLASTICOS.

摘要

Apparatus for manufacturing a strongly integrated compound strand formed by pressing together at least two different plastic materials. A first extruded plastic strand is pressed through a hollow cylindrical die and a second extruded plastic strand is pressed through a generally radial passageway into an annular portion. A rotary part rotated about the axis of the cylindrical die includes a portion of the passageway for helically winding the second plastic strand into the first plastic strand.