Importance

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Abstract

An extruder (2) comprising an extruder barrel comprising a plurality of barrel modules (4), each provided with an inner lining material (16), and at least one plate (6) is described. Such an arrangement facilitates assembly and dismantling of the barrel for replacement of inner parts. In a preferred embodiment, a plate (6) having an opening (26) passing therethrough and comprising projections (30) extending into said opening, is interposed between each two adjacent barrel modules (4), the openings of the plates (6) and internal surfaces of the barrel modules forming a substantially continuous passageway which provides an extrusion chamber (3). The plates (6) are provided with a plurality of bore holes around the circumference thereof arranged to correspond with bore holes located in external flanges (12) extending around end portions of the barrel modules, so that said plates and barrel modules may be sealingly secured together by the insertion of fastening means (28) into aligned bore holes of the plates and barrel modules.

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First Claim