Extrusion methods wherein material is guided through a passage crossing over between adjacent cylindrical bodies
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United States of America Patent
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Nov 21, 2023
Grant Date -
Oct 14, 2021
app pub date -
Jun 23, 2021
filing date -
Oct 27, 2014
priority date (Note) -
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Abstract
A screw includes a screw main body, a conveyance portion conveying a raw material, and a passage provided in the screw main body. The passage includes a first passage element, a second passage element, and a third passage element. The screw main body has a plurality of cylindrical bodies arranged in an axial direction of the rotating shaft. At least a portion of the conveyance portion is formed on outer peripheral surfaces of the cylindrical bodies adjacent to each other, and the passage is formed in the cylindrical body so as to cross over between the adjacent cylindrical bodies.
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