Extruder screw passages, extruder and extrusion method
AssigneesToshiba Kikai Kabushiki Kaisha, HSP Technologies Inc.
InventorsAkiyoshi Kobayashi, Shigeyuki Fujii, Takafumi Sameshima, Hiroshi Shimizu
Life of this patent
Estimating the term…
Abstract
An extruder screw includes a screw body. The screw body is rotated about an axis parallel to a direction of conveyance of a raw material. A conveyance portion having a flight is provided on the outer peripheral surface of the screw body. The flight is configured to convey the raw material along the axis of the screw body when the screw body is rotated. A passage for permitting the raw material fed by the flight to pass therethrough to the outer peripheral surface of the screw body is provided in the screw body in a position deviated from the axis of the screw body.
Claims11
An extruder screw for conveying a raw material while kneading the raw material, comprising:
- a screw body which has an axis extending in a direction of conveyance of the raw material, and is rotated about the axis, the screw body comprising a rotating shaft and a plurality of cylindrical members coaxially inserted around the rotating shaft;
- a conveyance portion provided on an outer peripheral surface of the cylindrical members of the screw body and including a flight, the flight being configured to convey the raw material along the axis of the screw body when the screw body is rotated;
- and a plurality of passages provided in the screw body and extending along the axis of the screw body,
- each passage of the plurality of passages comprising an inlet which is open to the outer peripheral surface of one of the cylindrical members and an outlet which is open to the outer peripheral surface of another of the cylindrical members that is disposed adjacent to said one cylindrical member, and a main passage portion formed in said one and said another cylindrical members that are disposed adjacent to each other, and
- the plurality of passages being provided in respective positions deviated from the axis of the screw body, the raw material conveyed by the flight flowing into the passages through the inlets and flowing through the main passage portions to the outlets.
Dependencies are inferred from the claim text.