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US 4,941,748 AGranted
Extruder with ceramic processing unit
AssigneeBayer Aktiengesellschaft
InventorsWerner Pusch, Martin Ullrich
Life of this patent
Estimating the term…
Abstract
On a single-screw or multi-screw extruder, the part of the barrel lying between a front plate (1) and end plate (2) bounding the processing unit is subdivided into barrel discs (5) of ceramic materials, which are arranged on at least one guide rail (7). The barrel discs (5) are held together by an anchor (9) fixed on the front plate (1) and end plate (2) and at the same time secured against twisting. In addition, the screw elements (3) within the processing unit between front plate (1) and end plate (2) are also made from the same or from another ceramic material.
Claims10
An extruder comprising:
- at least one screw element mounted on a screw shaft for rotation around a longitudinal axis thereof;
- means forming a barrel with a reaction space therein for rotatably receiving the at least one screw element and screw shaft, wherein the means forming the barrel comprises a plurality of barrel plates, each composed entirely of ceramic material and having an aperture therein and means mounting the plates in an abutting relationship perpendicular to the longitudinal axis of the screw shaft and with the apertures aligned to define the reaction space.
Dependencies are inferred from the claim text.