A method and apparatus for a hammer mill's worn discs. The disc can be refurbished by removing a peripheral portion of the disc and placing a ring on the peripheral rim left on the disc. The ring preferably has a tapered, radially inwardly facing surface that abuts the peripheral rim of the disc to form annular gaps on both sides of the disc/ring junction. Molten metal, such as during a welding process, is placed in the annular gaps to form annular beads that mount the ring to the disc effectively as if the ring, beads and disc were one integral piece. The disc/ring combination is preferably heat-treated to metallurgically improve the disc in order to prepare the disc's peripheral edge, which is made up of the ring, for impacts during use.

A rotor for a device for disintegrating feed material, comprising a drive shaft, a plurality of rotor disks mounted on the drive shaft, and disintegration tools arranged in the region of the outer circumference of the rotor disks. A holding flange is provided for each rotor disk for connecting the rotor disk to the drive shaft, wherein the holding flange is permanently connected to the drive shaft and detachably connected to the rotor disk. Devices for disintegrating feed material, in particular impact hammer mills, may thus be operated with a rotor, in which the risk of a shaking out and a lateral wandering of the rotor disks is largely eliminated.

A rotor for a device for disintegrating feed material, comprising a drive shaft, a plurality of rotor disks mounted on the drive shaft, and disintegration tools arranged in the region of the outer circumference of the rotor disks. A holding flange is provided for each rotor disk for connecting the rotor disk to the drive shaft, wherein the holding flange is permanently connected to the drive shaft and detachably connected to the rotor disk. Devices for disintegrating feed material, in particular impact hammer mills, may thus be operated with a rotor, in which the risk of a shaking out and a lateral wandering of the rotor disks is largely eliminated.

A method for detecting wear in crushers, having a wearing part (2) mounted on a drive shaft (1), during idle operation is described in which downtimes that impair crusher productivity can be eliminated and nevertheless reliable wear detection is made possible with low risk of injury to machine operators. The drive shaft (1) is accelerated from a starting angular speed (?1) to an end angular speed (?2) with a specified acceleration, and the drive energy required for this is ascertained, whereupon the wear of the wearing part (2) is ascertained as the value assigned to the required drive energy in a specified wearing-part characteristic curve (3, 4, 5).

A method for detecting wear in crushers, having a wearing part (2) mounted on a drive shaft (1), during idle operation is described in which downtimes that impair crusher productivity can be eliminated and nevertheless reliable wear detection is made possible with low risk of injury to machine operators. The drive shaft (1) is accelerated from a starting angular speed (?1) to an end angular speed (?2) with a specified acceleration, and the drive energy required for this is ascertained, whereupon the wear of the wearing part (2) is ascertained as the value assigned to the required drive energy in a specified wearing-part characteristic curve (3, 4, 5).

A bale processor of a type having flail rotor providing an outer support surface with a plurality of flails mounted thereon are mounted for movement therewith around a flail rotor axis for engaging the bale and removing material from the outside of the bale. A plurality of depth control bars are disposed between adjacent flails for controlling the distance that the outer end of the flails extend into the outer surface of the bale. In one embodiment the depth control bars are positioned close to the outer support surface of the flail rotor whereby the depth control bars prevent a buildup of twine or netwrap on the outer support surface of the flail rotor. In another embodiment engagement members rigidly attached to the frame, separate from the depth control bars, are disposed between flails for preventing a buildup of netwrap/twine on the flail rotor.

A bale processor of a type having flail rotor providing an outer support surface with a plurality of flails mounted thereon are mounted for movement therewith around a flail rotor axis for engaging the bale and removing material from the outside of the bale. A plurality of depth control bars are disposed between adjacent flails for controlling the distance that the outer end of the flails extend into the outer surface of the bale. In one embodiment the depth control bars are positioned close to the outer support surface of the flail rotor whereby the depth control bars prevent a buildup of twine or netwrap on the outer support surface of the flail rotor. In another embodiment engagement members rigidly attached to the frame, separate from the depth control bars, are disposed between flails for preventing a buildup of netwrap/twine on the flail rotor.

Methods for manufacturing improved free-swinging hammermill hammer configurations are disclosed and described and include hammers of a lightweight and efficient design. The improved hammers can be arranged in clusters. The free-swinging hammermill hammer configurations are for comminution of materials such as grain and refuse. The hammer configurations of the present disclosure are adaptable to most hammer mill or grinders having free-swinging systems. The improved configurations improve installing, removing, and cleaning hammer components within the hammermill. Additionally, the hammer configurations of the present disclosure improve the overall efficiency of the hammermill during operation.

An impact mill using hammers to strike particles and reduce their size as the material progresses through a grinding chamber. Baffles are provided in the grinding chamber, adjacent the interior wall thereof, concentrically about the drive shaft of the mill. The baffles are adjacent to the hammers in the area of hammer sweep and form a path for the material using the flow of air through the mill and the swing of hammers to keep material from falling within the mill and remaining in the hammer sweep area. A variable speed motor varies the rate of movement of the hammers to increase or decrease the rate of strike of hammers to more efficiently and effectively reduce the material passing therethrough. The baffles can be retrofit into existing mills and can be created in angular sections with the lining of the grinding chamber for modular installation and removal.

Shredder hammers having first and second major surfaces on opposing sides, and a circumferential edge. A mounting portion includes a mounting hole that extends from the first major surface to the second major surface, and is configured to receive a hammer mounting pin for mounting in a reducing system. The circumferential edge includes a primary impact face to initially impact materials to be reduced and a wear edge to subsequently crush and shear the material against a wall of the equipment. The hammer is biased forward on the pin to admit more material to be crushed between the wear edge and the grates.