Extrusion apparatus for producing composite structures

Plastic article or earthenware shaping or treating: apparatus – Means providing a shaping orifice – Plural distinct feed inlets

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264241, 4251335, B29F 304

Patent

active

041613856

ABSTRACT:
Extrusion-die system comprising an extrusion slit (3) fed upstream by two flows of polymeric materials, one of which issues from one or several flat conduits (7,8), the other from a multitude of small holes (18) drilled into a bar element of generally T-shaped cross-section (5). The cross-section of element (5) has a punch-like configuration with the holes being fashioned therein in two parallel rows and being staggered from one row to the other. The die system permits manufacture of products comprising a network of threads or filaments sheathed in a film or foil.

REFERENCES:
patent: 3611492 (1971-10-01), Schiebling
patent: 3759647 (1973-09-01), Schrenk et al.

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