Screw extruder housing
AssigneeWerner & Pfleiderer
InventorWilhelm Seufert
Life of this patent
Estimating the term…
Abstract
A screw extruder housing is made wear-resistant by providing a non-metallic lining formed of brittle material, the lining being divided into a multiplicity of individual wearing units firmly anchored in place in the casing.
Claims8
In a screw extruder housing for a screw extruder machine, which housing has one or more axially parallel bores for a screw shaft, the wall of each bore being provided with a wear-resistant lining, the improvement wherein:
- the wall of each bore is provided over its entire periphery with a plurality of recesses which are bounded by lands formed between adjacent recesses;
- and
- each of said recesses has a wearing insert disposed therein, said insert being made of a non-metallic material more wear resistant than the wall and being produced by the process of introducing the insert material into said recesses in the wall in a formable condition, and forming and hardening the inserts in situ.
A method of forming a wear resistant lining on the wall of each bore of a screw extruder housing for a screw extruder machine, which housing has one or more axially parallel bores for a screw shaft, comprising the steps of:
- forming a plurality of recesses, which are bounded by lands formed between adjacent recesses, in the wall of each bore over the entire periphery thereof;
- introducing into the recesses, in a formable condition, non-metallic material which in the hardened state is more wear resistant than the wall;
- and
- hardening the material into a wear resistant lining.
Dependencies are inferred from the claim text.