Shredder

Detailed introduction of shredder:

Working principle

Shearing type: Common double-axis or four-axis shearing shredders have two to four blade shafts. The blades on the blade shafts “shear and cut” each other to crush objects like scissors. The materials enter the shredding box through the feeding system. After the comprehensive effects of tearing, squeezing, and shearing by the blades, they are torn into small pieces and discharged from the bottom of the box1.

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Industrial equipment Double-axis shearing shredder

Roller cutting type: Multiple blades are installed on a rotating blade roller to form a cross-cut with the fixed blade to complete the material crushing effect1.

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Industrial equipment Roller cutting shredder

Tearing type: The main principle is to swing the hook to tear the garbage material, which is often used for coarse crushing1.

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Industrial equipment Tearing shredder

Structural type

Double-shaft shredder: It has two rotating shafts and two motors, with strong crushing capacity, and the throughput ranges from 300kg/h to 20t/h. It is not equipped with a screen. After the material enters the crushing box from the feed port, it is directly discharged after being sheared by the knife, and the discharge size is random. The characteristics of low speed and high torque make it more energy-saving. It can be used alone or for pre-treatment crushing in recycling production lines.
Single-shaft shredder: It is usually equipped with a rotating knife shaft with a blade installed on it. The material is crushed by the shearing and tearing action between the blade and the fixed liner or other parts. The single-shaft shredder has a relatively simple structure and is suitable for processing some relatively soft and thin materials, such as paper, plastic film, fiber, etc.

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Industrial Equipment Single Shaft Shredder

Four-Shaft Shredder: It has four blade shafts. Compared with the double-shaft shredder, its crushing effect is more refined and can crush the material into smaller particles. Four-shaft shredders are usually used in occasions with high requirements for crushing particle size, such as plastic recycling, electronic waste treatment, etc.

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Industrial Equipment Four-Shaft Shredder

Application Field

Plastic recycling industry: It can tear various waste plastics, such as large-diameter PE plastic pipes, bales of plastic film, plastic sheets and head materials, into small pieces for subsequent melting and granulation, and re-making plastic bottles, trash cans, etc.1.
Metal recycling field: It can tear metal barrels, refrigerators, cars, scrap steel, steel furniture and other thin metals to increase their stacking density for easy transportation and recycling4.
Solid waste treatment: It can handle large pieces of garbage such as old sofas, mattresses, tables and chairs; old clothes, leather, textile scraps in residents’ domestic garbage; garden garbage such as branches and trunks; hazardous solid waste such as medical waste and hazardous oil drums.
Papermaking industry: It is used to treat light slag from paper mills, twisted ropes from paper mills, and scraps from paper mills.
Biomass treatment: It can shred biomass stalks such as straw, wood, corn stalks, and bagasse to make biofuels or other biomass products.
Key points for purchase

Material characteristics: It is necessary to clarify the type, size, hardness, and toughness of the materials to be shredded. For example, the shredder models and tool configurations required for shredding metal and shredding plastic are different.
Output requirements: According to actual production needs, determine the processing capacity of the required shredder, that is, the amount of material that needs to be processed per hour or day.
Discharge size: If there are strict requirements for the size of the shredded material, it is necessary to select a shredder that can meet the corresponding particle size requirements.
Power system: Motors and reducers with appropriate power to ensure sufficient power for shredding, while considering energy saving and noise issues.
Tool material: The tool is a key component of the shredder. Wear-resistant and corrosion-resistant high-quality alloy tools such as 9CrSi, 42CrMo, etc. should be selected to extend service life and reduce maintenance costs.