Straw bale shredder - RBS

Cormall’s stationary RBS multi shredder shreds your straw economically  and efficiently, irrespective if you are using conventional, large or round  bales.

A special construction ensures a high capacity and low power consumption.
Straw is feed from the BT170 tables into the shredder and level sensors keep an even depth of material in the tube.
The tube rotates and ensures that there is always material being feed to the totating blades.
The capacity is controlled by raising and lowering the grid over the rotor and/or tube rotation speed.

Both the tube and rotors are reversible to save downtime changing blades and there is a stonetrap placed before each rotor.
Straw falls into a transport auger, over a second stone trap and to the hammer mill.

The RBS 260 shreds your straw economically and efficiently, weather it is a question of big, square and small bales

Shredding Rotor

The shredding rotor is equipped with knifes. On both sides is placed a primary stone trap for protection of the knifes.

The straw bale stamps are falling into the rotating tub where flexible arms are pushing/rotating the straw around and over the two shredder rotor’s in the bottom of the machine.
The material level inside the rotating tub is controlled with a level sensor working as a ultrasound sensor.
The conveyer table feeding the shredder is stopped when the “high level” (approx. 6-800 mm) is reached, and started again xx sec. after the high level is diapered again.
A round rigid plate cover above the rotating tub is keeping the straw inside the machine and prevents spillage of straw out of the machine.
There is a rubber sealing between the rigid and ro-tating tub.
The speed of the rotating tub is setting the capacity flow on the line, higher speed = more material throughput.
At the bottom in the shredder is placed shredder housing, where two rotating shredder rotor’s with each 82 knifes are shredding at 3000 rpm, tip speed is 47 m/s.
The knife rotor is protected by a grid that holds back material, the knifes are shredding between these grid bars.
In front and after the grid, is placed a bypass stone trap, this is a 80 mm wide opening along the full length of the rotor that allows stones and other obstacles that are sliding on the bottom of the machine, to by-pass the shredder rotor.
Both rotors are individually controlled/watched by a amp watch, and a set point protects them against overload. If the amp usage on either of the motors is above set point level (adjustable) for more than 0,2 sec. then will the; 1. rotating tub be stopped and, 2. the straw feed table is stopped, until the motors have been under their set point again for more then 3-5 sec. (adjustable). The rotating tub will start again with a ramp of 3 sec.
Under the two shredder rotor is placed a conveying auger that transports the shredded straw to the stone trap.