Double-Converging Conveyor Comminuting Apparatus

The patent applies periodic action by implementing alternating compression and relaxation cycles during the comminuting process. The material is subjected to repeated compression pulses rather than continuous fast compression, allowing micro-cracks to propagate during compression phases while relaxation phases reduce energy dissipation through friction and heat. This periodic approach maintains productivity while significantly reducing overall energy consumption.

The invention changes the compression parameter from constant high-speed compression to variable-speed periodic compression. By modulating the compression rate and applying controlled stress cycles, the system achieves effective comminution with lower energy input. The parameter change involves transitioning from a single high-energy impact to multiple lower-energy cyclic compressions that accumulate fracture damage efficiently.

The periodic compression cycles allow for controlled crack propagation that results in more uniform particle sizes. Each compression pulse creates fractures at predictable stress concentration points, and the repeated cycles progressively reduce particle size in a controlled manner rather than creating arbitrary fracture planes through single high-speed impacts.

The invention applies preliminary action by subjecting the material to initial low-energy compression cycles that create pre-cracks and weaken the material structure before final size reduction. This preliminary weakening phase prepares the material for more uniform subsequent comminution, ensuring better particle size control and reducing arbitrary fracture patterns.

The periodic compression approach with controlled cycle frequency and amplitude prevents excessive fine particle generation. By using multiple lower-energy compression pulses instead of high-speed impact, the system reduces the formation of hyperfine fractions that represent lost material. The relaxation phases between compression cycles allow particles to stabilize and prevent excessive fragmentation.

The invention applies partial action by using compression forces that are sufficient to achieve comminution but deliberately kept below the threshold that would cause excessive fine particle generation. Rather than applying excessive high-speed compression force, the system uses controlled partial compression cycles that achieve size reduction while minimizing the creation of unwanted hyperfine material.