Patent GB-257297-A (GB)
Title: Improved method of and apparatus for cutting and simultaneously mixing various materials
IPC: B02C18/14
Filed: 1926-05-12
Abstract: 257,297. Ohio Trust Co., (Assignees of Napier, G. R.). May 19, 1925, [Convention date]. Rotary mixers.-A method for cutting and simultaneously mixing materials consists in subjecting the materials to be cut to centrifugal force, preferably in a vertical or substantially vertical plane, and cutting radially into, almost but not entirely through, the materials which are simultaneously mixed. As shown, the materials are placed in a drum 1, and are cut by rotary knives 32, Figs. 1 and 4, journaled and slidable transversely in bearings adjustable radially relatively to the drum. A combined knife guard and feed hopper 49, 50 is provided, and a scraper 57 assists in mixing the mass. A scraper 53 directs the material into a discharge shoot 52. The knives 32 are adjusted to be just out of contact with the drum 1 which may be provided with an inner liner to prevent the drum from being attacked by the material. The liner may be of aluminium iron, metal known under the Trade Mark name "Monel Metal," or hard rubber. Thin coatings of tin or rubber may be applied by dipping or electrolysis. In one form, a liner is formed in two or more parts, the meeting edges being clamped between the drum sections whilst the outer edges overlap the flanges 3, 5. The drum 1 has annular flanges 7 which run in grooved rollers on shafts 9, 10, the shaft 9 being positively rotated through gearing by a motor 17. The side flanges 3 of the drum are bent over at 5 to prevent the material from passing from the drum into the housing 11 containing the driving- mechanism. Disc knives having continuous or toothed edges, or a roller having cutting-projections, may be used. As shown. disc knives 32 are spaced and clamped by blocks 34 keyed to the shaft 20 and tightened by nuts 35, and the shaft 20 is journaled in arms 21, 22 which are pivotally carried on the shaft 9 and are connected by turnbuckles 25 with a shaft 28 revoluble by a hand-lever 30 whereby the radial adjustment of the knives 32 is effected. Adjustable stops finally position the knives. The arm 22 contains bevelled driving-gear 35 - - 39, Fig. 8, connecting the shaft 9 and the shaft 20, and also an oscillating arm 45 pivoted at 46 and operated by a removable roller pin 42 which engages a forked end of the lever 45 and is carried eccentrically by a gear 40 rotated by a gear 41 on the shaft 9. The other end of the arm 45 carries a roller 47 which engages the shaft 20 which may be thereby reciprocated axially. The consequent lateral displacement of the knives assists the mixing. The members 49, 50 each comprise end walls, which are connected to the arms 21, 22 and a cross wall located near the cutters. One end wall is curved outwardly to catch material passing through the machine, as well as to retain material which is charged into the hopper. The scraper 53 is moved into or out of engagement with the drum by a handle 55. The mixing scraper 57, which has agitating members projecting therefrom, is operated by a handle 55<a> and the falling material is deflected by a plate 59 angularly movable with the scraper.