Method for making a product to be extruded, and an extruder
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United States of America Patent
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Feb 13, 2001
Grant Date -
N/A
app pub date -
Sep 9, 1998
filing date -
Apr 4, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for making a product to be extruded and an extruder. The extruder has at least two conical stators and at least one conical rotor placed rotatably between the stators. The extruder further has supply conduits for feeding the material to be extruded separately into the exterior and interior of the rotor. Each supply conduit is provided with a separately adjustable feeding device by means of which the amount of material flow to be supplied can be adjusted. The degree to which the space between the rotor and the stator is filled and the amount of the heat generated by friction can be regulated. Further, the ratio of the material flows in the different supply conduits determines the ratio of the thickness of the layers obtained. The method and extruder according to the invention make it possible to regulate the properties of a final product easily and in several different ways.
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