Two-component extrusion die

摘要

An extrusion nozzle produces a product from two components, where one component is in the shape of a star, with the spaces between its arms filled by the second component. The nozzle is in three zones. In the first (I) an inner tube (9) with a star shaped cross section shapes the first component. In the second zone (II) this tube opens out into a circular cross section, with vents (18) through which the second component is fed into the gaps between the arms of the star. The two components are forced into intimate contact with each other in the third zone (III). the second product is fed into the nozzle via a helical duct (0) opening (16) into an annular chamber (21) with longitudinal vents (18) towards the centre.