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US 2006/0016307 A1Published application
Apparatus for cutting ductile materials and a method of operating the apparatus
AssigneeCoperion Buss AG
InventorAndreas Rieck
Life of this patent
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AssigneeCoperion Buss AG
InventorAndreas Rieck
Estimating the term…
A cutting apparatus for ductile materials comprises a nozzle having a number of outlet openings separated from each other by separator webs. Next to the nozzle, a rotating cutting tool is provided, having a plurality of cutting knives for cutting off the strands of material discharged through the outlet openings of the nozzle. Each separator web is at least as wide as a cutting knife. For performing a cutting operation, the cutting tool is intermittently rotated. Between two cutting operations, the cutting tool is stopped, whereby its knives remain in a rest position behind the separator webs. For the next cutting operation, the cutting tool is rotated by such an amount that its cutting knives move from a position behind a first separator web to the next adjacent separator web.
An apparatus for cutting ductile materials, particularly for chopping plastic materials processed in an extruder or in a mixing and kneading apparatus, said cutting apparatus comprising:
A method of operating a cutting apparatus comprising a nozzle means having a plurality of outlet openings separated from each other by separator webs, a cutting tool adapted to be driven to a rotational movement and having a plurality of cutting knives for cutting off material strands discharged through said outlet openings of said nozzle means, and a drive means adapted to drive said cutting tool to an intermittent rotational movement, comprising the step of intermittently moving each of said cutting knives from a first position behind a first separator web to a second position between a second, adjacent separator web, whereby said movement of said cutting knives is stopped for a predetermined time period when said cutting knives are behind said separator webs.
Dependencies are inferred from the claim text.