The BRAVO pre-shredder has been designed to homogenize scrapboth as it is and in bales, before the subsequent hammer mill shredding process..The material to be homogenized is loaded by theoperator into the pre-shredding chamber..By gravity, sliding along the inclined feeding surface, the material comes into contact with the first slow feeding shaft , which, once it grips the scrap, pushes it towards the area where the teeth of the two counter-rotating rotors intermesh.The scrap, passing through the gaps between the teeth of the toothed crowns, is pulled and torn apart..The torn scrap is pushed by thefast shredding and discharge shaft towards the discharge area onto the conveyor belt feeding the Hammers mill..
The rotors, slow and fast, of the pre-shredder are indipendent and driven by hydraulic motors..The two counter-rotating shafts can transmit power up to 1350 hp and rotate at different speeds with a constant ratio..
Theclosed-loop hydraulic system controlling the two hydraulic motors is equipped with axial piston pumps fitted with constant power regulation system, allowing The closed-loop hydraulic system controlling the two hydraulic motors is equipped with axial piston pumps featuring a constant power regulation system, allowing speed and torque to be adjusted according to shredding requirements. adeguandoli alle condizioni di triturazione.
The slow and fast shafts are fitted with toothed crowns with an teeth have different shapes for their respective functions:
The discs and teeth, made of alloy steel, are monoolithic, highly resistant to stress and wear.Thecombined action of high torque and constant speed ratio allows the teeth to pull and tear the scrap producing homogeneous output material that is more easily processed by hammer mills.
The toothed crowns are subject to wearwhen necessary, they must be rebuilt by welding overlays with an appropriate filler materials.The service life of the toothed crowns can reach several thousand operating hours without the need for replacement.
The pre-shredder is suitable for E.L.V., light scrap, collected scrap, sheet metals, tanks and material up to 3 mm thickness..The difficult materials reduces the service life of the toothed crowns , and continuous use may cause the teeth to bend or break, requiring premature replacement..
The wall on which the scrap slides toward the underlying counter-rotating shafts is a movable surface (FLAP) that oscillates via a hydraulic cylinder, pressing the scrap against the rotor teeth.
The cylinder is controlled by an independent open-loop hydraulic system with an electric motor, depending on rotor power.The movement of the FLAP is closely synchronized with the rotor movement.
The Large, bulky, and hard-to-process materials can cause shaft overloads and material floating.Has been designed and implemented a new FLIPPER configuration (patented) with its oscillating action, reduces scrap size, facilitates material feeding into the shredding area and limits floating phenomena.
During automatic operation, when overload conditions occur, the shafts reverse rotation to release the teeth from the material that caused the stoppage.
BRAVO is the ideal solution for pre-shredding:
BRAVO Advantages
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