In an era where resource recycling and environmental protection are highly valued, the double-shaft shredder, as a key crushing equipment, is playing an increasingly important role. With its unique design and powerful performance, it can efficiently process various waste materials, laying a solid foundation for resource recycling and reuse. As a professional manufacturer of sorting equipment and machinery, we provide high-quality double-shaft shredders to help you achieve greater success in the field of environmental protection and resource recycling. 

Working Principle of Double-Shaft Shredder

 Also known as a shear-type shredder, the double-shaft shredder mainly reduces the size of materials through shearing, tearing, and extrusion. It consists of two counter-rotating tool shafts, on which hard and sharp shredding blades are arranged in a staggered manner. 

 When materials enter the interior of the shredding chamber through the feeding system, it is like falling into the mouth of a steel giant. As the tool shafts rotate at high speed, the blades interlock and shear, exerting a strong tearing and squeezing force on the materials. Whether it is tough metal products, flexible plastics and rubbers, or heavy woods and textiles, they are difficult to resist this force.

  Metals are twisted and broken under the biting of the blades, plastics are torn into pieces, woods are crushed into sawdust, and various wastes are quickly decomposed into uniform small pieces, which are finally discharged from the lower part of the chamber. This lays a solid foundation for subsequent resource-based processing procedures such as sorting and reprocessing.  

In addition, the double-shaft shredder is usually equipped with start, stop, reverse, and overload automatic reverse control functions. When encountering large pieces of material that are difficult to crush or when the equipment is overloaded, the tool shafts will automatically reverse to avoid equipment damage. At the same time, it helps the material readjust its position for re-crushing, ensuring stable and efficient operation of the equipment. 

Models of Huichuan Heavy-Duty Double-Shaft Shredder 

Product Types of Double-Shaft Shredder

 Plastic Double-Shaft Shredder

 Designed specifically for plastic materials, it can process various plastic materials, including polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyester (PET), etc. Whether it is light and soft plastic films or hard and thick plastic pipes and sheets, it can easily handle them. The equipment is equipped with a high-performance motor and reducer to generate sufficient torque and force. The blades are made of high-quality materials and fine processing technology, with strong wear resistance, which can maintain sharpness for a long time and achieve efficient crushing. 

Metal Double-Shaft Shredder 

Mainly used for crushing waste metal materials, such as scrap steel, scrap iron, waste auto parts, metal scraps, etc. Its cutters are made of high-strength alloy materials, with extremely strong wear resistance and shearing force, which can crush hard metals into small pieces for subsequent smelting and recycling. Some metal double-shaft shredders also have an automatic iron removal function, which can separate ferromagnetic materials during the crushing process to improve the purity of metal recycling. 

Rubber Double-Shaft Shredder Suitable for crushing waste tires, rubber products, etc. Through specially designed blades, it can crush rubber tires and other materials into smaller particles, which can be used to produce recycled rubber, rubber powder, and other products, or as raw materials in other industrial fields. The rubber double-shaft shredder usually has an anti-winding design, which can effectively prevent rubber materials from winding around the blades during the crushing process and ensure the continuous operation of the equipment.

 Wood Double-Shaft Shredder It can shred wood, branches, waste furniture, and other wood materials into sawdust or small pieces. These crushed materials can be used in industries such as biomass fuel, artificial boards, and paper making. The blades of the wood double-shaft shredder are sharp and durable, which can easily cut wood fibers. At the same time, the equipment can adjust the discharge particle size according to user needs to meet different production requirements. 

Domestic Waste Double-Shaft Shredder Designed for urban domestic waste treatment, it can shred various components in waste, such as wood, textiles, plastics, paper, etc., into smaller particle sizes, facilitating subsequent sorting and treatment. This type of shredder usually has a large feed inlet, which can adapt to domestic waste of different shapes and sizes. It is also equipped with a sealing device and a dust removal system, which can effectively reduce dust flying and odor diffusion during the shredding process, protecting the environment and the health of operators. 

Usage Method Preparation

 Before Installation • Site Selection: Choose a flat, solid, and well-ventilated site to install the double-shaft shredder. Ensure that the site has enough space for equipment operation, maintenance, and subsequent material feeding and discharging transportation. At the same time, the site should be away from humid, dusty, or corrosive gas environments to avoid damaging the equipment. • 

Foundation Construction: Pour a suitable concrete foundation according to the equipment's size and weight requirements, and reserve fixed bolt holes. The foundation should ensure flatness, and a level gauge and other tools can be used for calibration to prevent the equipment from tilting after installation, affecting normal operation.

 • Equipment Integrity Inspection: After the equipment arrives, carefully check whether all components are complete according to the equipment list, and whether there is any damage caused during transportation, such as the appearance and connection parts of key components like the tool shaft, blades, motor, and control cabinet. If any problems are found, contact the manufacturer in time to solve them.

Equipment Installation 

 Main Body Installation: Use a crane or other suitable lifting equipment to smoothly place the main body of the double-shaft shredder on the foundation according to the predetermined position, and fix it with anchor bolts. When tightening the bolts, gradually apply force evenly in a diagonal order to ensure that the equipment is firmly installed on the foundation. •

 Electrical Connection: Professional electricians should carry out wiring operations according to the electrical wiring diagram. Ensure that the specifications of the power supply line meet the equipment's power requirements and that the grounding is good to avoid safety hazards such as electric leakage. After the connection is completed, carefully check whether all circuits are firmly connected and whether the insulation is good, and conduct a simple debugging of the electrical components in the control cabinet to check whether the functions of indicators, buttons, etc., are normal. •

Connection of Supporting Equipment: If there are supporting feeding devices (such as conveyor belts, hoppers, etc.) and discharging devices (such as belt conveyors, discharge chutes, etc.), they should be accurately connected according to the design requirements to ensure good sealing at the connection points, smooth material transportation, and reasonable settings for the height and angle of feeding and discharging to facilitate the stable entry and exit of materials from the double-shaft shredder. Debugging and Operation • 

No-Load Debugging: Before formal feeding, carry out no-load debugging first. Start the equipment and observe whether the rotation direction of the tool shaft is correct (it should rotate according to the arrow direction marked on the equipment), whether there is any abnormal noise or vibration in the motor operation, and whether the connection parts of each component are firm. After running for a period of time (generally recommended for not less than 30 minutes), check whether the oil temperature and bearing temperature of the equipment are within the normal range (usually the oil temperature should not exceed 60°C, and the bearing temperature should not exceed 70°C). If any abnormal conditions are found, stop the machine immediately to troubleshoot and solve the problem. •

 Load Debugging: After the no-load debugging is normal, carry out load debugging with a small amount of materials. Slowly put the materials into the feed inlet and observe the crushing effect of the equipment to see whether the materials can be normally shredded and whether the discharge particle size meets the requirements. At the same time, pay attention to the load situation of the equipment, such as whether the motor current is within the rated range. If overload causes the equipment to automatically reverse, analyze the reasons, which may be too fast material feeding or too large and hard foreign objects in the materials. Adjust the material feeding speed in time or clean up the foreign objects, and then continue debugging, gradually increasing the material feeding amount until reaching the equipment's rated production capacity. Formal Use 

• Feeding Operation: During formal production, feed the double-shaft shredder evenly and moderately. Reasonably control the feeding speed and amount according to the material's characteristics (such as hardness, humidity, size, etc.) and the equipment's processing capacity. Avoid putting too much material at one time to cause equipment blockage, and do not stop feeding for a long time to affect production efficiency. If there are materials with larger sizes, try to pre process them in advance to make their sizes meet the equipment's feeding requirements.

 • Operation Monitoring: During equipment operation, assign special personnel to monitor, closely pay attention to the equipment's operation status, including the motor's current and voltage, the equipment's temperature, sound, and the material's shredding situation, etc. Regularly check whether the discharge particle size is stable. If any abnormal conditions occur (such as motor overload, unsmooth discharge, abnormal equipment vibration, etc.), stop the machine in time for processing. It is strictly forbidden to operate the equipment with faults. • 

Regular Maintenance: According to the equipment's maintenance requirements, regularly maintain the double-shaft shredder, such as timely cleaning the residual materials and dust inside the equipment, regularly checking the wear situation of the blades and replacing or repairing them, lubricating the transmission components such as bearings and chains, and checking and tightening the electrical system's wiring, etc., to extend the equipment's service life and ensure that the equipment is always in good operation condition. Shutdown Operation • 

Normal Shutdown: When the production task is completed or the equipment needs to be suspended, stop feeding first. After the materials inside the equipment are basically shredded and discharged, press the stop button to turn off the equipment's power supply. After turning off the power supply, also turn off the power supply of related equipment such as supporting feeding and discharging devices. • 

Emergency Shutdown: During equipment operation, if sudden emergency situations occur (such as equipment smoking, catching fire, severe vibration, personnel injury, etc.), immediately press the emergency stop button to cut off the equipment's main power supply, and then quickly troubleshoot the cause. After ensuring safety and eliminating the fault, the equipment can be restarted. 

Application Cases of Double-Shaft Shredder 

Plastic Recycling Field 

A waste plastic recycling and processing enterprise adopted our double-shaft shredder to crush a large amount of waste plastics. The enterprise mainly recycles various waste plastic packaging, plastic pipes, etc. In the past, traditional crushing equipment was used, with low efficiency and poor crushing effect. After introducing the double-shaft shredder, it can quickly crush large pieces of plastic into small pieces, which are then processed through classification, cleaning, melting, etc., and finally high-quality recycled plastic particles are produced. By using this equipment, the enterprise's recycling efficiency has increased by nearly 50%, and production costs have decreased by 30%, achieving both economic and environmental benefits. At the same time, in the automotive manufacturing industry, double-shaft shredders are also commonly used to crush automotive plastic parts. The high-quality recycled plastic particles produced after crushing can be reused to manufacture new automotive parts, promoting resource recycling in the automotive industry. 

Metal Recycling Field

 Huichuan's double-shaft shredder has performed outstandingly in the metal recycling industry. The equipment can carry out corresponding compression on various waste metals and achieve automatic feeding. Its unique tool shaft structure and four-corner rotating cutters can avoid the phenomenon of shaft winding or equipment blockage during low-speed and high-torque production, thereby improving production efficiency. For waste steel, copper, aluminum, and other metals, the double-shaft shredder can quickly crush them into high-density, high-purity, and basically impurity-free particles, which can be directly reused in steel mills' boilers or as raw materials for other metal processing enterprises, greatly improving metal recycling rates and reducing enterprises' raw material procurement costs. Construction

 Waste Treatment Field 

double-shaft shredder has played an important role in construction waste treatment. Construction formwork is a common waste in construction, among which wood-based plywood formwork is widely used. Using a double-shaft shredder, waste construction formwork can be crushed, and then screening equipment is used to separate recoverable materials such as metals and non-combustible materials such as concrete. Then, an RDF RDF molding machine is used to process combustible materials into RDF particles, which are a very marketable fuel. High-quality wooden RDF fuel can cost up to thousands of yuan per ton in some places. In addition, the double-shaft shredder can also process wooden waste in construction waste such as sofas, mattresses, tables, and chairs. After crushing, nails, wires, and other materials inside can be separated. It has the advantages of low-speed transportation, high safety, low equipment wear, low noise, and no large amount of dust, achieving the resource utilization of construction waste, reducing landfill volume, and creating economic benefits for enterprises. 

Waste Tire Treatment Field 

The double-shaft shredder can crush tires into small pieces of dozens of millimeters. The crushed rubber powder is injected into a pyrolysis furnace, which can be converted into carbon black and pyrolysis oil, which can be used in rubber product production, fuel, and other fields. For example, after a truck tire is processed by a double-shaft shredder, its recycling value is equivalent to saving 60 liters of crude oil. In addition, the crushed rubber powder can also be used as a modifier for asphalt pavement or as raw materials for environmental protection floor mats in sports venues, improving the added value of waste tires and reducing environmental problems caused by waste tire accumulation. Electronic Waste Treatment Field When processing electronic waste, the double-shaft shredder can crush circuit boards, waste home appliances, etc., into small particles, making it easier to screen out metal and non-metal components. For example, an electronic waste recycling enterprise used a double-shaft shredder to crush waste computer hosts, mobile phones, etc. Through subsequent processes such as magnetic separation and flotation, metals such as iron, copper, and aluminum, and non-metallic materials such as plastics were successfully separated. The metal recovery rate increased by more than 20%, effectively improving the resource recycling efficiency of electronic waste and reducing environmental pollution caused by electronic waste. 

Advantages of Double-Shaft Shredder •

 Powerful Crushing Capacity: The double-shaft design gives it a large crushing ratio, capable of processing various materials with different hardness, toughness, and shapes. Whether it is large waste or difficult-to-crush materials, it can be effectively crushed. The blades are made of high-quality alloy materials, with strong wear resistance and                                                                          shearing force, ensuring long-term stable crushing effects.                                 

 High Efficiency and Energy Saving  : The equipment runs at a low speed but has a large torque, achieving efficient crushing with low energy consumption. Compared with some traditional crushing equipment, the energy consumption of the double-shaft shredder can be reduced by about 30%. At the same time, it has a strong processing capacity, with a single-machine processing capacity of 10–30 tons per hour, meeting large-scale production needs. •

 Low Noise and Low Dust: Through reasonable structural design and sealing devices, the double-shaft shredder has low noise during operation, reducing the impact on the working environment. In addition, the supporting dust removal device can effectively control dust flying, meeting environmental protection requirements and protecting the health of operators. •

 Simple Operation and Maintenance: Adopting a PLC control system, it can realize automatic control, with functions such as start, stop, reverse, and overload automatic reverse, making operation simple and convenient. When the equipment's cutters are worn, they can be repaired by surfacing welding and other technologies, extending the service life of the cutters and reducing maintenance costs. At the same time, the split design makes the disassembly and replacement of tool shafts and other components more convenient, facilitating daily maintenance and repair. •

 Wide Applicability: It can be applied to multiple industries, such as plastics, metals, rubbers, woods, domestic waste, electronic waste, etc., meeting the needs of different users. It is an important tool for waste management and resource recycling •

 Case Study of Huichuan Double-Shaft Shredder Exported to the Philippines • 

A large waste metal recycling plant in the Philippines had long struggled with the inefficient processing of massive scrap metals. The complex mix of waste metals—including used automotive parts, metal barrels, and discarded steel—combined with low-efficiency and high-cost traditional processing methods, created significant operational challenges. To address this, the plant introduced a metal double-shaft shredder. •  

• Featuring a dual-shaft design with high-strength alloy blades, the equipment uses gear-driven speed differentiation to operate two tool shafts simultaneously, generating powerful shearing force. When waste metals enter the shredder, an upper material pressing device compacts the materials first, after which the dual-shaft blades rapidly shear, tear, and crush them: used automotive parts are quickly dismantled and shredded, while metal barrels are broken into small pieces in a short time. •  

• This metal double-shaft shredder can process 8–10 tons of waste metal per hour, producing uniformly sized metal particles that facilitate subsequent smelting and recycling. Equipped with an automatic reverse function, the tool shafts will automatically reverse when overloaded to prevent blade damage and ensure stable operation. • 

 • Since adopting the metal double-shaft shredder, the plant has achieved a nearly 40% improvement in waste metal processing efficiency and a 30% reduction in labor costs. Meanwhile, the shredded metals are easier to smelt, increasing metal recovery rates by approximately 20%, which significantly enhances the enterprise’s economic benefits and market competitiveness. This case provides a valuable reference for other local waste metal recycling enterprises in the Philippines, demonstrating the efficiency and practicality of metal double-shaft shredders in waste metal processing. 

• Conclusion 

• With its unique working principle, diverse models and product types, and extensive successful application cases, the double-shaft shredder has become an ideal equipment for resource recycling and waste treatment. As a professional manufacturer of sorting equipment and machinery, we are committed to providing customers with high-quality, high-performance double-shaft shredders, as well as comprehensive after-sales services and solutions. Whether you are engaged in plastic recycling, metal processing, construction waste treatment, or other related industries, our double-shaft shredders can help you improve production efficiency, reduce costs, achieve sustainable resource utilization, and contribute to environmental protection. •  

• If you are interested in our double-shaft shredders or have any questions, please feel free to contact us. We will wholeheartedly serve you.