Rotatable hopper having twin screws
AssigneeBuhler AG
InventorsRoland Halter, Achim Sturm, Bernhard Stalder
Life of this patent
Estimating the term…
Abstract
A device for dosing and/or mixing highly viscous and non-flowable materials, especially pigment pastes. The device includes a funnel which revolves about its own axis and a twin screw arranged inside the funnel. The twin screw arranged in a horizontal position in the funnel and contacts the interior wall thereof. This arrangement ensures that all moveable parts of the device mutually strip and clean one another.
Claims10
A device for metering and/or mixing substantially highly viscous, non-flowable materials, comprising:
- a housing having an outlet aperture formed therein;
- a pump positioned in proximity with the outlet aperture of the housing;
- a hopper mounted on said housing, said hopper being rotatable about an axis thereof;
- and
- material conveying means positioned in said hopper and extending in proximity with an inner wall of the hopper, the materials being guided to a position beneath the hopper through the outlet aperture of the housing and to a position in proximity with said pump by said material conveying means, said material conveying means comprising one of a twin screw and a double screw assembly having first and second screws which extend parallel to one of a mantle line and a generating line of the substantially conical wall of the hopper and through said housing outlet aperture to said pump and wherein in operation said screws and said substantially conical wall contact the material so as to mix the material and simultaneously force the material into the pump.
An extruder assembly having a device for metering and/or mixing substantially highly viscous, non-flowable materials, comprising:
- a housing having an outlet aperture formed therein;
- a pump positioned in proximity with the outlet aperture of the housing;
- a hopper mounted on said housing, said hopper being rotatable about an axis thereof;
- an extruder connected to said housing;
- and
- material conveying means rotatably positioned in said hopper and extending in proximity with an inner wall of the hopper, the materials being guided to a position beneath the hopper through the outlet aperture of the housing and to a position in proximity with said pump by said material conveying means, said material conveying means comprising one of a twin screw and a double screw assembly having first and second screws which extend parallel to one of a mantle line and a generating line of the substantially conical wall portion of the hopper and through said housing outlet aperture to said pump and wherein in operation said screws and said substantially conical wall contact the material so as to mix the material and simultaneously force the material into the pump.
A system having a device for metering and/or mixing substantially highly viscous, non-flowable materials, comprising:
- a housing having an outlet aperture formed therein;
- a pump positioned in proximity with the outlet aperture of the housing;
- a hopper mounted on said housing, said hopper being rotatable about an axis thereof;
- and
- material conveying means movably positioned in said hopper and extending in proximity with an inner wall of the hopper, the materials being guided to a position beneath the hopper through the outlet aperture of the housing and to a position in proximity with said pump by said material conveying means, said material conveying means comprising one of a twin screw and a double screw assembly having first and second screws which extend parallel to one of a mantle line and a generating line of a substantially conical wall portion of the hopper and through said housing outlet aperture to said pump and wherein in operation said screws and said substantially conical wall contact the material so as to mix the material and simultaneously force the material into the pump.
Dependencies are inferred from the claim text.