GB428237A - Improvements in or relating to grinding, crushing and mixing mills - Google Patents

Abstract

428,237. Edge-runner mills. WASS, J., Glendon, Park Drive, Forest East, Leicester. Nov. 20, 1933, No. 32306. [Class 59] In an edge-runner mill which discharges by centrifugal action, a fan is provided under the pan to discharge dust or like products outwards in a horizontal direction from the mill through a nozzle or an opening provided in the mill. As shown in Fig. 1, the pan 1 is rotated by bevel gears 34, 35 driven by a pulley 42 and the rollers 7 are mounted in a movable casing 5 retained by springs 12, the tension of the springs and the pressure of the rollers on the pan being adjusted by nuts 11. A fan 48 with adjustable blades 45 discharges dust &c., from the mill through opening in the mill casing to a volute 49. The roller spindle 24 is provided with a collar 23<a> against which the core 7<a> is retained by a fixed collar 27. The conical shell 7b of the roller is retained on the core by lugs 17 on the shell engaging cam surfaces on the core. Material is fed in at 13 in the casing 5 and is discharged through the conical base 3. Packing 9 may be inserted between the movable casing 5 and the fixed base 3b. In a modification the pan is flat and the periphery is close to the casing 5 to prevent material falling below the pan. The discharge outlet is formed in the side of the casing 5 and is approximately of the width of the pan. In Figs. 3 and 4 the conical rollers 7 are mounted on ball bearings on spindles 8 fixed in the casing 5 and deflectors 14 guide the incoming material beneath the rollers, other deflectors 5f and 5e near the periphery of the pan are spaced at different distances from the surface of the pan such that 5e deflects the coarse material inwardly under the rollers and 5<f> deflects the fine material to the edge of the pan.