Screw feeder
OwnerDirk Junginventor
Life of this patent
Estimating the term…
Abstract
Screw feeder (1) for transporting and/or metering pulverulent or granular material, having a rotatably mounted feeder screw (3) for the transport of material from a storage vessel (2) to a discharge opening (6), and having a variable-speed motor (4) for driving the feeder screw, characterized in that the speed is controlled by a programmable regulating device (7) which regulates the speed of the motor as a function of the respectively determined rotary position of the feeder screw within one full worm revolution.
Claims20
A screw feeder preferably adapted for transporting and/or metering pulverulent or granular material comprising a feeder screw (3) seated for rotation for transporting material from a storage vessel (2) to a discharges opening (6), and a variable speed motor (4) for driving said feeder screw, said motor being characterized in that, that the rotational speed control is obtained by a programmable control unit (7) which controls the rotational speed of the motor in dependence on the respective detected rotational position of the feeder screw within one full screw revolution, wherein a reference sensor (9) is provided for detecting absolute rotational position of the feeder screw (3).
A screw feeder preferably adapted for transporting and/or metering pulverulent or granular material comprising:
- a feeder screw (3) seated for rotational movements about its longitudinal axis for transporting material from a storage vessel (2) to a discharge opening (6), whereby said storage vessel (2) positioned adjacent to one longitudinal end of said screw feeder as input opening and said discharge opening being positioned adjacent to the other longitudinal end of said screw feeder,
- a variable speed motor (4), which is engaged with said rotatably seated feeder screw (3) for driving said feeder screw,
- and a programmable control unit (7), which is coupling with means for detecting of rotational position of the feeder screw (3) and connected with said variable speed motor (4), said programmable control unit controls the rotational speed of said motor in dependence on the respective detected rotational position of the feeder screw (3) within one full screw revolution.
Dependencies are inferred from the claim text.