I. Granulator Blades / Crusher Knives
Granulators (often called crushers or pelletizers in the industry) are primarily used for high-speed, fine cutting of materials that have already undergone coarse or medium-sized crushing, to produce uniform granules.
Working Principle: High-speed rotating blades work in conjunction with fixed blades to create powerful shearing and impact forces.
Blade Structure: Typically rectangular, V-shaped, or stepped blades are used, requiring sharp edges and precise cutting angles. The rotating blades are mounted on a rotating main shaft, and the fixed blades are fixed to the inside of the
machine frame.
Typical Applications: Crushing PET bottles, injection molding scraps, and small pipes into uniform 3-10mm granules for subsequent pelletizing.
Core Materials: High-speed steel (HSS), Cr12MoV, SKD11, DC53, requiring high hardness and excellent wear resistance.
II. Single-Shaft Shredder Blades / Inserts
Single-shaft shredders are adept at processing large-volume, irregularly shaped, or difficult-to-convey materials for medium-level coarse crushing.
Working Principle: A low-speed, high-torque rotating main shaft, combined with a hydraulic feeding device, pushes the material towards the main shaft. The material is "chewed" and sheared by the blades on the rotating main shaft.
Blade Structure:
Rotating Blades (Inserts): Typically square or rhombic blocks, fixed in the grooves of the blade shaft with bolts.
Features: The biggest advantage of these blades is that they are usable on four (or multiple) sides. After wear, simply loosen the bolts and rotate to a new cutting edge, greatly extending the maintenance cycle.
Fixed Blades: Fixed at the bottom of the machine frame, working in conjunction with the rotating blades for shearing.
Typical Applications: Pre-processing of large bundles of film, bulk bags, waste furniture, automotive parts, and electronic waste (WEEE).
Core Materials: D2, DC53, requiring extremely high impact resistance and wear resistance. III. Double-Shaft Shredder Blades/Cutters
Double-shaft shredders are powerful tools for processing the most complex and difficult materials. Their core characteristic is the powerful "biting" and "tearing" action.
Working Principle: Two low-speed, high-torque main shafts rotate in opposite directions, forcibly shredding and cutting the material through the biting force between the blades.
Blade Structure:
Plate/Multi-claw blades: The blades are disc-shaped with multiple claws on the edge (3 claws, 5 claws, 12 claws, etc.), mounted in series on the main shaft, separated by spacers.
Features: Extremely strong tearing force, excellent anti-winding ability, and less prone to material jamming.
Typical Applications: Medical waste, industrial hazardous waste, oil drums, tires, metal and plastic mixtures, etc.
Core Materials: 42CrMo, 6CrW2Si, H13, Hardox wear-resistant steel, emphasizing the toughness of the material to prevent chipping and breakage when processing complex mixed materials.
IV. Chipper Blades
Chippers are mainly used in biomass energy, wood processing, and landscaping fields, aiming to cut wood into uniform wood chips.
Working Principle: A high-speed rotating flywheel or cutter head uses sharp blades to cut the wood at high speed.
Blade Structure: Usually rectangular blades mounted on the flywheel, requiring extremely sharp and flat edges.
Features: Blade design needs to consider the wood fiber direction and humidity to ensure uniform chip size, improving combustion efficiency or pulp quality.
Industrial wood chipper blades supplier
Core Materials: A8, A8B, H12, requiring excellent sharpness and resistance to chipping.