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US 6,585,923 B1Granted
Extrusion method and extruder
AssigneeNatural Colour Kari Kirjavainen Oy
InventorKari Kirjavainen
Life of this patent
Estimating the term…
Abstract
An extrusion method and an extruder, the material to be extruded being fed with a material feeding device (1) into a radial pump unit included in the equipment. The radial pump unit comprises conical gearwheels (2) which are adjacently positioned and rotate in opposite directions. The radial pump unit transfers the material in an annular flow into the extruder's nozzle (4). Additional material (20) can be supplied into the product through the radial pump unit.
Claims37
An extrusion method comprising the steps of:
- feeding material from a material feeding device through a gearwheel unit, where the gearwheel unit is a radial pump unit with conical gearwheels which are adjacently positioned and rotate in opposite directions;
- and
- transferring an annular flow of the material from the radial pump unit into a nozzle.
An extruder comprising:
- at least one material feeding device;
- a gearwheel unit and
- a nozzle arranged after the gearwheel unit,
- the material feeding device being arranged to feed a material through the gearwheel unit into the nozzle,
- the gearwheel unit being a radial pump unit comprising conical gearwheels arranged to be adjacently positioned and to rotate in opposite directions and the radial pump unit being arranged to transfer an annular flow of the material into the nozzle.
2 more elements
Dependencies are inferred from the claim text.