| 摘要 |
The invention relates to a dosing feeder for dosing a powder and/or granular material comprising an inner rotatable rotor (5) with grooves (6) extending in the longitudinal direction and distributed in the circumferential direction which contain variable dosing chambers, a mechanism (7) rotatable with the rotor and comprising arms (12) which are axially displaceable along said rotor, wherein the size of the dosing chambers in each groove is simultaneously adjustable through the displacement of the arms along the grooves of the rotor. In each groove (6) there are arranged first and second means (12, 13; 21, 22, 23; 34, 35, 31, 32) for delimiting the dosing chambers. A curved shape can cooperate with a flap (14, 21) or shoes (34, 35) with steps (31, 32), so that during displacement of the arms (12) along the rotor, the volume of the dosing chambers dimishes resp. increases continuously or stepwise depending on the shape of said means. |
