DS Twin-shaft Shredder (double-rotor)

Almost any plastic that arrives too large or too contaminated for a crusher: HDPE drums, barrels and containers, LDPE and LLDPE film, PP crates and automotive parts, PVC pipe and profile, ABS and PS housings, EPS and EPE foam, PET trays and strapping, woven PP sacks, nylon, polycarbonate, fibre-reinforced GFRP and CFRP, and plastic-metal composites from e-waste. It also takes wood pallets and aluminium profile. Dirt, labels and small metal pieces are tolerated.

Because it cuts by shear rather than impact, and shear needs torque instead of speed. A planetary gear reducer converts motor speed into the very high torque needed to grip a drum or a bale and tear it apart. Running slowly also keeps friction heat low, which stops film melting into lumps, and makes the machine far more tolerant of stray metal than a high-speed crusher would be.

Between 12 and 32 cutting discs, scaling with rotor length: 12 on the DS600, 16 on the DS800, 20 on the DS1000, 24 on the DS1200, 28 on the DS1400 and 32 on the DS1600. Each disc bolts on individually, so a damaged one is replaced on its own rather than requiring work on the whole shaft.

The Siemens PLC watches motor current. When load exceeds the threshold, the drive stops and automatically reverses to back the obstruction out of the mesh, then resumes forward. Most jams clear in that cycle with no operator action. If reversal does not clear it, the machine shuts down instead of continuing to draw current, protecting the motors and gearboxes. A safety lockout prevents the chamber being opened while the shafts can turn.

Only if your required output size is 20 mm or larger. Discharge screens on this machine produce 20–100 mm pieces, so anything finer needs a crusher after it. The two machines are complements rather than alternatives: the shredder handles size and contamination that would wreck a crusher, and the crusher takes the shred down to the final fraction.

9CrSi for clean rigid plastic and film, where toughness and replacement cost matter more than edge retention. D2 for abrasive post-consumer material such as soiled agricultural film or sand-loaded woven sacks. Tungsten carbide steel for the abrasive extremes, principally glass- and carbon-fibre-reinforced plastics. Choosing the hardest available grade for everything is a mistake — harder steel is more brittle and chips where a tougher grade would simply deform.

It depends on bulk density. Dense rigid material falls onto the rotors under its own weight and feeds itself. Light, springy, bulky feedstock — foam board, empty drums, baled film — tends to bridge above the shafts or ride on top of them, and a pusher is what keeps the bite consistent. On that kind of material it is the difference between rated throughput and roughly half of it.

Yes. The DS series ships as a complete unit with its motors, planetary reducers and Siemens PLC control cabinet, and is commissioned on site. Tell us the material, the size it arrives in, the tonnes per hour you need and what the shred feeds next, and we will size the model and the discharge screen around that rather than around a catalogue figure.