GB582993A - Improvements relating to rotary cutter apparatus for disintegrating raw material - Google Patents

Abstract

582,993. Rotary disintegrators. BAMAG, Ltd., and MANNING, A. H. May 6, 1944, No. 8628. [Class 5 (i)] A rotary cutter or disintegrator to shear solely by impact material, e.g., grass, herbs, vegetable, beet leaves food waste, fish products &c. comprises a number of arms or blades 8 mounted for gyration at high speed on a shaft 1 located coaxially in a barrel 17 which forms part of a duct for gas. e.g., air to convey the material. The blades may be freely pivoted on spindles 7 so that they align themselves radially during operation by centrifugal force. The material to be cut and dried is fed by a screw conveyer 20 into a duct 18 and then passes to the barrel 17 where it becomes airborne owing to the suction of a fan 2 which then discharges the cut material and air through 11 and 12 to the casing 16 of a drier. The fan 2 draws hot gas from the drier casing 16 down the duct 19. Tailings or larger or heavier insufficiently dried pieces collect in an annulus 21 and are led back down the gas (air) duct 19 and go through the cutting zone again. The cutter may be used in various pneumatic transport systems, e.g., to cut silage before it is blown to the top of the silos or, in drying systems, to subdivide the material before it is blown into the stream of hot drying gas. The cutter blades 8 and tubular spacers 9 between discs 5 are all mounted on the spindles 7 passing from end to end. The blades are arranged to form a single-start or two-start helical progression for the material and are inclined like propeller blades with leading and if desired their trailing edges bevelled but they may be more blunt for tougher material. The inside of the barrel may have longitudinal ribs to prevent or retard any rotation of the bulk of the material that may be tend to be caused by the cutters.