A crusher blade is a mechanical component, typically made of hardened alloy steel, designed for shredding and crushing various materials like plastics, wood, paper, and e-scrap. Specifications vary by blade type, but common characteristics include a specific material composition (e.g., D2, SKD-11), hardness ratings (e.g., HRC52-55), and a design with multiple cutting edges that create different sizes of output particles
Function : Blades are installed in crushers and grinders to reduce the size of materials through high-speed cutting action, either with a single-shaft or double-shaft design.
Design: A common configuration is a pair of flat knives, consisting of a moving knife and a fixed knife. The number of blades can range from 3 moving knives and 2 fixed knives, or more, depending on the machine.
Blade Types: Blades come in different shapes depending on the material they are designed to crush:
Flat Blades
Suitable for crushing thin-walled plastic products like blown film, bottles, and thin tubing.
Slice Blades
Used for brittle plastics such as pipes, profiles, and sheets.
V-Blades
Best for crushing plastic films and bags.
Claw Blades
Designed for hard materials like plastic rods and blocks.
Specifications
Material
For Soft Materials (Paper, Rubber, Film): 9CrSi, which offers high hardness and wear resistance.
For Hard Materials (Wood, Hard Plastic): D-2/SKD-11, known for high wear and shock resistance.
Other materials include alloy steel, M2 high-speed steel, and tungsten carbide.
Hardness: Heat treatment typically targets a hardness of HRC52-55.
Performance: Blades are designed to be durable and long-lasting, with consistent sharpness for uniform particle size reduction.
Customization: Most blades are not standard models and are customized based on the customer's specific requirements for material and quantity, with processing times typically between 15 and 30 days.
Output Size: The final crushed particle size can be controlled by adjusting the position of the moving knife. Some crushing and grinding machines have a specific output size range, such as 1-20 mm.
Maintenance: Regular sharpening and maintenance are necessary to ensure efficiency and prolong the blade's lifespan.