According to Herbold Meckesheim, its SB Series granulators employ a patented screw-feed mechanism that makes them quieter and more efficient than gravity-fed size-reduction equipment for pulverizing polyethylene terephthalate (PET) bottles and other recyclable plastics. The company says that these granulators additionally boast:
- The ability to process up to 7 tons of plastic per hour.
- A screw that maintains a steady feeding pace, even if the plastic is a hodgepodge of sizes and shapes, instead of depending on the materials to fall directly into the blades.
- Delivery of the materials to be granulated from the unit’s hopper to the cutting chamber by 1 or more conveyor screws mounted at an angle (45° to 90°) to the rotor axis.
- A throughput 30 to 50 percent above that of gravity-fed machines with cutting chambers of the same size.
- The elimination of fly-back.
- Reduced wear to the cutting blades, as well as reduced fines and dust.
- Suitability for dry or wet operations.
- The flexibility to be used for secondary size reduction of pre-shredded plastics.
- Less power consumption.