Single screw extruder

摘要

The invention relates to a single-screw extruder comprising a cylinder (1), which comprises a transition zone (14), and a homogenizing zone (12) that is connected to the transition zone (14), and a screw (2) which is rotatably supported in the cylinder (1) and which has at least two consecutive displacement parts (6, 8) in the homogenizing zone (12), the second displacement part of which in the conveying direction is designed as a shearing part. The aim of the invention is to provide a single-screw extruder which enables an improved melting effect along with an increased throughput, a lowered melt temperature, and an improved pressurization capability. According to the invention, it was recognized that this aim can be achieved in that at least one groove (4) running in the longitudinal direction in the inner cylinder wall is provided in the homogenization zone (12) of the single-screw extruder, and said groove ends in the area between a first displacement part and the subsequent shearing part (8) as viewed in the conveying direction.

主权项

1. A single screw extruder, comprising:
a cylinder including a melting zone and a homogenizing zone, which adjoins the melting zone, said cylinder having an inner wall formed in the homogenizing zone with a first longitudinal groove; and a screw mounted rotatably in the cylinder and having in a region of the homogenizing zone at least two successive process sections as viewed in a conveying direction, wherein at least one of the process sections is constructed as a shear section, wherein the first groove ends in the conveying direction in a region between the successive process sections of the homogenizing zone.