Extruders for thermoplastics material
AssigneeHermann Berstorff Maschinenbau GmbH
InventorWerner Muller
Life of this patent
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Abstract
A two stage extruder comprising a first, vertical extruder and a second, horizontal extruder with the working chambers of the two stages connected by a connecting passage and off-set from one another so that each lies at a tangent to the other in a region which is a lower outlet region of the vertical stage and a drawing-in region of the horizontal stage; the vertical stage has a plasticizing portion with a planetary arrangement, a screw shaft supported in a lower axial pressure bearing and a butting ring for the planetary spindles disposed on the screw shaft. A lower cylindrical liner for the vertical stage has an aperture therein and the effective size of the connecting passage can be adjusted by rotating the liner.
Claims10
A two stage screw extruder for thermoplastic moulding materials, said extruder comprising a first, vertical extruding stage and a second, horizontal extruding stage;
- a working chamber for each of said stages;
- a passage connecting said working chambers;
- said working chambers being off-set from one another so that each lies at a tangent to the other at a lower outlet region of said vertical stage and a drawing in region of said horizontal stage;
- a planetary plasticising portion for said vertical stage;
- a screw shaft for said vertical stage;
- a lower axial pressure bearing supporting said screw shaft;
- and a butting ring for planet spindles of said planetary plasticising portion disposed on said screw shaft at the lower end of said planetary plasticising portion.
Dependencies are inferred from the claim text.