The double-shaft shredder is a key equipment in the field of solid waste treatment and resource recycling. It shreds and crushes materials through two relatively rotating knife shafts, and processes them into small-sized particles or fragments for subsequent treatment and reuse.

Working principle: The core of the double-shaft shredder is two parallel mounted knife shafts, on which shredding blades are installed. When working, the knife shafts rotate relative to each other at different speeds. After the material enters the shredding chamber, it is gradually torn into small pieces and discharged by the shearing, extrusion, and tearing of the blades.

Structural composition: It is mainly composed of knife shafts and blades, a box, a drive system, a feeding and discharging device, and an electrical control system. The knife shaft is made of high-strength alloy steel, and the shape and size of the blade are designed according to the characteristics of the material, which is easy to replace and maintain; the box is welded with thick steel plates, with a strong structure and good sealing; the drive system includes a motor, a reducer and a coupling to provide power for the knife shaft; the feeding and discharging device realizes automatic material transportation; the electrical control system controls the operation of the equipment and ensures safety.

Performance characteristics: high shredding efficiency, the relative rotation of the double blade shafts causes the material to be subjected to multi-directional shearing forces; wide application range, can process a variety of materials such as scrap metal, plastic, wood, rubber and domestic waste; adjustable discharging particle size, achieved by replacing the blade or adjusting the blade shaft spacing; stable and reliable operation, compact equipment structure, reasonable design, high-quality and durable key components; convenient maintenance, simple blade replacement, and an inspection door for easy inspection and maintenance.

Application areas: In the recycling of scrap metals, metal products can be torn into small pieces for smelting and reprocessing; when recycling plastics, waste plastics are crushed into particles as recycled plastic raw materials; in the wood processing industry, waste wood and scraps can be processed to produce artificial boards, biomass fuels, etc.; in the recycling of rubber products, waste tires are torn into particles or powder for the manufacture of rubber products; domestic waste treatment plants are used to pre-treat large pieces of garbage to reduce the volume for subsequent processing.

Selection points: Consider the material characteristics and select the appropriate blade material, shape and blade axis parameters; clarify the processing capacity to avoid equipment idleness or overload; determine the discharge particle size requirements and select

The double-shaft shredder is a kind of mechanical equipment widely used in the field of waste material treatment. It is mainly used to break various large-sized and high-strength solid waste into smaller sizes for subsequent transportation, recycling and reuse. Its working principle mainly involves key links such as feeding, shredding and discharging.

In the feeding stage, the material is fed into the feeding port of the double-shaft shredder through conveying equipment or manual operation. The feeding port is usually designed as a trumpet-shaped or specific size opening to ensure that the material can enter the shredding cavity smoothly and accurately, while preventing the material from overflowing or jamming during the feeding process.

After entering the shredding cavity, the material comes to the core shredding link. The double-shaft shredder is equipped with two parallel and relatively rotating knife shafts, each of which is equipped with multiple sharp and sturdy shredding blades. When the motor drives the two knife shafts to rotate at different speeds or at the same speed but in opposite directions through the transmission device, strong shearing and tearing forces are formed between the blades. Under the shearing, squeezing and tearing of the blades, the original structure and strength of the material are gradually destroyed, thus achieving crushing. The combination of blades of different shapes and sizes can adapt to materials of various characteristics, such as metal, plastic, wood, rubber, etc., to ensure efficient and stable completion of the shredding task.

After the shredded material reaches the set size requirements, it enters the discharge stage. Driven by the rotation of the knife shaft, the crushed material is discharged from the gap between the blades and the discharge port of the shredding cavity. The size and shape of the discharge port can be adjusted according to actual needs to control the size specifications of the discharged material. Some double-shaft shredders are also equipped with a discharge conveying device, which can directly convey the crushed material to the next processing link, realizing the automation and continuity of the entire processing process.

Double-shaft shredders are usually also equipped with an overload protection device. When encountering unbreakable hard objects or too much material causing excessive load, the device will automatically trigger to stop the equipment from running, avoiding damage to key components such as the knife shaft and blades due to overload, and ensuring the safe and stable operation of the equipment.

As the core equipment in the field of waste material treatment, the double-shaft shredder plays a key role in resource recycling, garbage disposal and other industries with its unique design and excellent performance. The following are its significant features and advantages:

Features of double-shaft shredder

1. Double-shaft collaborative operation: equipped with two parallel and counter-rotating knife shafts, the blades cooperate with each other to form a strong shearing and tearing force, which can efficiently crush various materials. Just like two people pulling hard from different directions, it is easier to destroy an object than to use force in one direction.

2. Diverse blade designs: The shape, size and arrangement of the blades can be flexibly customized according to the characteristics of the material. For hard metals, thick and sharp blades are used; when processing soft plastics, the blade shape and angle can be optimized to achieve efficient crushing.

3. Strong and durable structure: The whole is made of high-strength steel, and the key components such as the knife shaft and the box body are specially treated to withstand high-intensity operations and frequent impacts, extend the service life of the equipment, and reduce maintenance costs.

4. Easy and safe operation: equipped with an intelligent control system, the operator can easily set the operating parameters such as speed, crushing time, etc. through the control panel. At the same time, the equipment is equipped with complete safety protection devices, such as overload protection, emergency stop button, etc., to ensure the safety of operators and equipment.

Advantages of double-shaft shredder

1. Wide crushing range: It can handle a variety of materials such as metal, plastic, wood, rubber, waste home appliances, electronic waste, etc., one machine for multiple uses, reducing the equipment procurement cost of the enterprise.

2. Good crushing effect: It can crush the material into uniform small particles to meet the requirements of different subsequent processing processes and improve the resource recycling rate.

3. High efficiency and energy saving: It adopts advanced power system and optimized design to reduce energy consumption while ensuring crushing efficiency, saving operating costs for enterprises.

4. Good environmental protection performance: The crushing process has good sealing, reduces dust flying and noise pollution, meets environmental protection requirements, and helps enterprises achieve green production.

>What is a double-shaft shredder?

A double-shaft shredder is a mechanical device that uses two sets of interlaced rotating knives to tear, squeeze and shear materials. It is equipped with two sets of relatively rotating knife shafts, on which multiple sets of blades are installed. It is driven by a motor and a reducer. It is suitable for processing large-volume, high-toughness, and difficult-to-crush materials. It is widely used in resource recycling, solid waste treatment and other fields.

>What is the working principle of a double-shaft shredder?

When a double-shaft shredder is working, the two sets of knife shafts rotate at low speeds in opposite directions, and the blades interlock with each other. After the material enters the crushing chamber, it is first hooked and torn by the blades, and then subjected to extrusion and shear forces, and gradually decomposed into small pieces. As the knife shaft continues to rotate, the crushed material is discharged from the screen, and the material that does not meet the particle size requirements continues to remain in the chamber for secondary crushing until it meets the standard.

>What are the characteristics of a double-shaft shredder?

The double-shaft shredder has the characteristics of low speed and high torque, stable operation and low noise; it adopts modular tool design, which is easy to disassemble and replace; it can handle a variety of complex materials and has strong adaptability; it is equipped with an overload protection system, which automatically reverses or stops when encountering hard objects to ensure equipment safety; it has high crushing efficiency and the output particle size can be flexibly adjusted by replacing the screen.

>What materials are suitable for double-shaft shredders?

Double-shaft shredders are suitable for processing high-toughness or large-volume materials such as scrap metal (such as iron sheets, aluminum profiles), plastics (plastic barrels, films), rubber (tires, hoses), wood (waste furniture, wooden boards), domestic garbage, medical waste, etc. They are also often used in the pre-treatment stage of electronic waste and kitchen waste to help resource recovery and solid waste reduction.

>What is the output of double-shaft shredders?

The output of double-shaft shredders is affected by the size of the machine, the nature of the material and the particle size of the output. Small equipment has an hourly output of about 0.5-2 tons, which is suitable for small recycling stations; medium-sized equipment can produce 2-8 tons/hour, which meets the general solid waste treatment needs; large industrial-grade equipment can produce up to 10-20 tons/hour, which is often used in large-scale resource recycling enterprises.

>Does the double-shaft shredder consume a lot of energy?

Compared with traditional crushers, the double-shaft shredder adopts a low-speed operation mode, which reduces idling energy consumption, and the high-torque design can effectively reduce the power required for a single crushing. By optimizing the transmission system and motor configuration, when processing materials of the same weight, its energy consumption can be reduced by 20%-30%, and the energy-saving effect is significant.

>How to maintain the double-shaft shredder?

Daily maintenance mainly includes regular inspection of blade wear, timely cleaning of residual materials in the crushing chamber to avoid foreign objects stuck; lubrication and maintenance of bearings, gears and other components; replacement of lubricating oil every 3-6 months according to the frequency of use; if the blade is severely worn, it can be repaired by welding or directly replaced with a new blade to ensure continuous and efficient operation of the equipment.

>Can the particle size of the double-shaft shredder be adjusted?

Yes. A replaceable screen is installed at the bottom of the double-shaft shredder, and the size of the screen aperture determines the particle size of the material. Users can choose screens of different specifications according to their needs. For example, when dealing with domestic waste, a screen with a larger aperture can be selected to achieve rapid volume reduction; when dealing with metal recycling materials, a small-aperture screen can be replaced to obtain a finer finished product.

>In which industries are double-shaft shredders used?

Double-shaft shredders are widely used in solid waste treatment industries (domestic waste, medical waste crushing), resource recycling industries (scrap metal, plastic, rubber recycling), papermaking industries (pulping pretreatment), wood processing industries (scrap wood recycling), as well as automobile dismantling, electronic waste treatment and other fields. They are important equipment for achieving material reduction and resource utilization.

>What is the future development trend of double-shaft shredders?

In the future, double-shaft shredders will develop in the direction of intelligence, large-scale, and environmental protection. Intelligence is reflected in the integration of Internet of Things technology to achieve remote monitoring and fault warning; large-scale development is to meet the needs of large-scale solid waste treatment; environmental protection is achieved by optimizing the sealing structure and installing dust removal devices to reduce dust and noise pollution, while developing special models suitable for emerging fields such as new energy battery recycling.