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US 4,365,946 AGranted
Apparatus for continuously processing rubber, elastomers, plastics and like materials which can be vulcanized or cross-linked
AssigneeHermann Berstorff Maschinenbau GmbH
InventorDietmar Anders
Life of this patent
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Abstract
Apparatus located at the output end of a screw extruder comprising a mandrel to rotate with said screw and a jacket coaxial with the mandrel and rotatable in an opposite direction of rotation to the mandrel at a speed which is steplessly adjustable. Sealing lips co-operating with abrasion rings are preferably provided on relatively moving surfaces of the jacket and stationary housings and temperature adjustment means can be provided in the jacket and the mandrel.
Claims11
Apparatus for continuously processing rubber, elastomers, plastics and the like materials which can be set by heat, comprising:
- (a) an extruding cylinder and an extruding screw mounted for rotation therein,
- (b) means for driving said screw,
- (c) an elongated mandrel disposed coaxially with said screw and secured to the downstream end of said screw for rotation therewith,
- (d) jacket means surrounding a substantial portion of the length of said mandrel and spaced therefrom to provide an axially extending annular opening in which the material is vulcanised, and
- (e) means for rotating said jacket means at an adjustable speed in a direction opposite to the direction of rotation of said screw and mandrel,
- whereby the relative rotary movement of said mandrel and said jacket means permits the temperature to be controlled in said annular opening between said jacket means and said mandrel so as to achieve optimum vulcanisation of the material.
3 more elements
Dependencies are inferred from the claim text.