Screw-type fine powder raw material feeding device and method
AssigneeThe Japan Steel Works, Ltd.
InventorsYohei Shimizu, Jun Kakizaki, Yoshihiko Iwamoto
Life of this patent
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Abstract
A screw-type fine powder raw material feeding device includes a screen (5) wound on the outer periphery of a tubular receiving member (21) and a plurality of annular metal fixtures (23) for bringing the screen (5) into close contact with the tubular receiving member (21) side. A gap (D) between the screen (5) and an outer diameter of a screw (2) is set to 1 mm to 10 mm, only a gas separated from the fine powder raw material is discharged to the outside from the gas vent ports (20), and the fine powder raw material is fed into a cylinder (1a), with no fine powder raw material being leaked to the outside from the screen (5). The invention also relates to a method of using the device.
Claims4
A screw-type fine powder raw material feeding device comprising:
- a tubular receiving member (21) connected to a kneading cylinder (1a) of a kneading extruder (1) and having a plurality of gas vent ports (20);
- a tubular feeding body (22) connected to the tubular receiving member (21) and having a hopper (7);
- and one screw (2) that is rotatably provided through the tubular receiving member (21) and the tubular feeding body (22) and serves to feed a fine powder raw material with a low bulk density of 0.05 g/cc to 0.5 g/cc into the kneading cylinder (1a), wherein the device further has a screen (5) wound on an outer periphery of the tubular receiving member (21) and a plurality of annular metal fixtures (23) for bringing the screen (5) into close contact with the tubular receiving member (21) side, a gap (D) between the screen (5) and an outer diameter of the screw (2) is set to 1 mm to 10 mm, only a gas separated from the fine powder raw material is discharged to the outside from the gas vent ports (20), and the fine powder raw material is fed into the kneading cylinder (1a), with no fine powder raw material being leaked to the outside from the screen (5).
A screw-type fine powder raw material feeding method comprising using a screw-type fine powder raw material feeding device including:
- a tubular receiving member (21) connected to a kneading cylinder (1a) of a kneading extruder (1) and having a plurality of gas vent ports (20);
- a tubular feeding body (22) connected to the tubular receiving member (21) and having a hopper (7);
- and one screw (2) that is rotatably provided through the tubular receiving member (21) and the tubular feeding body (22) and serves to feed a fine powder raw material with a low bulk density of 0.05 g/cc to 0.5 g/cc into the kneading cylinder (1a), wherein the device further has a screen (5) wound on an outer periphery of the tubular receiving member (21) and a plurality of annular metal fixtures (23) for bringing the screen (5) into close contact with the tubular receiving member (21) side, a gap (D) between the screen (5) and an outer diameter of the screw (2) is set to 1 mm to 10 mm, only a gas separated from the fine powder raw material is discharged to the outside from the gas vent ports (20), and the fine powder raw material is fed into the kneading cylinder (1a), with no fine powder raw material being leaked to the outside from the screen (5).
Dependencies are inferred from the claim text.