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What is the working principle of double shaft shredder

2026-09-16 Leave a message

1. Low Speed & High Torque Shearing

  • Works through two counter‑rotating shafts fitted with interlocking cutters.
  • Shafts rotate at low speed and deliver high torque.
  • Reduces material mainly by shearing and tearing instead of high‑speed impact.
  • Suitable for bulky, tough, and mixed waste.

2. Material Feeding & Cutter Biting

  • When material enters the shredding chamber, rotating cutters bite and pull it downward.
  • Material is repeatedly cut between adjacent moving cutters, fixed side cutters, and cutter spacers.
  • Hollow, elastic, and fibrous materials are also torn apart because cutters grip them from both sides.

3. Size Reduction & Discharge Control

  • After being sheared into smaller pieces, material falls through the discharge area under gravity.
  • Final particle size influenced by cutter thickness, cutter spacing, shaft speed, and whether a screen or downstream equipment is used.
  • Without a screen, output is usually coarse and irregular.

4. Intelligent Control & Overload Protection

  • Most units use a PLC control system for start, stop, forward rotation, and automatic reverse.
  • If a hard object or overload is detected, shafts reverse automatically to release material.
  • Protects cutters, gearbox, and motor.
  • Control logic helps the shredder run more safely and continuously.