Patent Number: 6,305,831

Title: Apparatus for mixing and advancing a polymer melt

Abstract: An apparatus for mixing and advancing a polymer melt, which includes a mixer and a conveying device. The mixer comprises a tubular mixing shaft (outer shaft) and an inner mixing shaft (inner shaft). The tubular outer shaft is arranged in surrounding relationship with the inner mixing shaft. Both mixing shafts extend in cantilever fashion into a mixing chamber, and a passageway is formed at the front end between the mixing chamber wall and the free end of the outer shaft, so that the mixing chamber is divided into an inner mixing chamber (inner chamber) and an outer mixing chamber (outer chamber), which are interconnected via the passageway. A melt inlet and a melt outlet are arranged in such a manner that the melt flow advances through the inner chamber and the outer chamber in opposite directions.

Inventors: Gathmann; Egon (Remscheid, DE), Stausberg; Georg (Remscheid, DE), Schafer; Klaus (Remscheid, DE), Dickmeiss; Friedel (Eschweiler, DE)

Assignee: Barmag AG

International Classification: B29C 47/64 (20060101); B29C 47/60 (20060101); B29B 7/40 (20060101); B29B 7/34 (20060101); D01D 1/00 (20060101); D01D 1/06 (20060101); B29B 007/10 ()

Expiration Date: 10/23/2018