Extruder screw having paths within the screw, extruder, and extrusion method
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United States of America Patent
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Nov 14, 2023
Grant Date -
Nov 18, 2021
app pub date -
Jul 28, 2021
filing date -
May 8, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A conveyance portion, a barrier portion, and a path are provided at places of a portion of a screw main body in which a kneading portion is provided. In at least one of the places, an entrance is opened to cause raw materials, conveyance of which is limited by a barrier portion to increase pressure on the raw materials, to flow in. The raw materials flowing in from the entrance flow through the path in the opposite direction to a conveyance direction of the conveyance portion. An exit is opened in an outer circumferential surface of the screw main body at a position outside the conveyance portion in which the entrance is opened.
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