Apparatus for extruding a homogeneous tubular length of soft...

Details Apparatus for extruding a homogeneous tubular length of soft... Apparatus for extruding a homogeneous tubular length of soft...

B - Operations, Transporting

29

D

18/726

B29D 23/04 (1980.01)

Patent

CA 1044864

PATENT APPLICATION OF REINER KADER FOR APPARATUS FOR EXTRUDING A HOMOGENEOUS TUBULAR LENGTH OF SOFT THERMOPLASTIC MATERIAL ABSTRACT OF THE DISCLOSURE An improved extrusion apparatus for extruding a tube of soft thermoplastic material of improved consistency and homogeneity is provided. A double walled piston having an annular chamber between the inner and outer annular walls thereof is mounted for sliding longitudinal movement between the interior wall of the apparatus housing and a longitudinal core disposed in the housing. The thermoplastic material fed into the apparatus first enters the annular piston chamber which, even during upward and downward movement of the piston, remains constant.

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