Double-Shaft Plastic Fine Shredder
What Is a Double-Shaft Plastic Fine Shredder?
A double-shaft plastic fine shredder is an industrial size-reduction machine used in the pre-treatment stage of plastic recycling. It reduces the bulk volume of incoming materials and prepares them for more stable feeding into downstream equipment.
The machine uses two counter-rotating shafts to continuously tear and shear the feedstock. Its pusherless design supports flexible feeding of irregular, bulky, medium-hard, or flexible materials. Depending on the material and recycling line configuration, the shredded feedstock can be sent to a crusher, granulator, washing system, or pelletizing line for further processing.
ACERETECH’s Double-Shaft Plastic Fine Shredder is available in multiple models for different material sizes, processing requirements, and installation conditions.
Suitable Materials and Operating Conditions
Double shaft fine shredder is specially designed for film, ton bags, woven bags, wood, books and other medium hard or soft materials. Such shredder uses two-shaft and non-pusher structure, which ensures high flexibility. The unique design of cutting chamber minimizes shaft friction. Two counter-rotatory shafts continuously shred materials to improve efficiency and maximize output . Siemens plc control system has functions of start, stop and automatic reversal under overload condition.
The Double-Shaft Plastic Fine Shredder can be configured for a range of medium-hard and flexible materials, including:
- Plastic film
- FIBC bags, jumbo bags, and ton bags
- PP woven bags
- Wood and books
- PET lumps and straps
- Plastic pallets
- Rigid plastic parts and other bulky plastic waste
The correct configuration depends on the material’s size, hardness, bulk density, moisture, contamination level, and required output. Before selecting a model, ACERETECH engineers can evaluate the feedstock and recommend the appropriate rotor, cutting chamber, screen specification, motor configuration, and downstream equipment.
For application-specific examples, see the PET lumps and straps shredding case, the plastic pallet recycling solution, and the rigid plastic recycling and washing process.
The Double-Shaft Plastic Fine Shredder may be configured for a range of plastic, bulky, and mixed waste materials, depending on the feedstock characteristics, machine configuration, and project requirements.
Plastic and Recycling Feedstocks
- Plastic film
- FIBC bags, jumbo bags, and ton bags
- PP woven bags
- PET lumps and straps
- Plastic pallets
- Rigid plastic parts
- Waste wood and books
Bulky and Mixed Waste Materials
- Waste printed circuit boards (PCBs)
- Used metal drums and oil drums
- End-of-life vehicles (ELVs)
- Scrap rubber tires
- Scrap metal cans
- Waste mattresses
- Other bulky or mixed waste materials
Material suitability depends on the feedstock size, hardness, density, moisture, contamination level, metal content, and required output. For applications involving metal, rubber, vehicles, or mixed waste, the rotor, blade configuration, feeding system, safety features, and downstream separation equipment may require project-specific design.
Before selecting a model, ACERETECH engineers can evaluate the feedstock and recommend the appropriate cutting configuration, machine model, feeding method, and downstream equipment.
For application-specific examples, see the PET lumps and straps shredding case, the plastic pallet recycling solution, and the rigid plastic recycling and washing process.
How Does a Double-Shaft Fine Shredder Work?
A Double-Shaft Fine Shredder uses two counter-rotating shafts fitted with cutting blades. The shafts pull the material into the cutting chamber, where the blades continuously tear and shear the feedstock.
The shredding process includes three main steps:
- Material Feeding: The feedstock enters the cutting chamber through the hopper or feeding system.
- Twin-Shaft Shearing: Two counter-rotating shafts grip, tear, and shear the material from both sides.
- Volume Reduction: The material is reduced into smaller, more manageable pieces for conveying, crushing, washing, or further size reduction.
The pusherless structure provides flexible feeding for irregular or bulky materials. A Siemens PLC control system supports automatic start and stop functions, overload protection, and reverse rotation when excessive resistance is detected.
Role in the Plastic Recycling Process
A double-shaft shredder is typically installed at the front end of a plastic recycling line. Its main role is to reduce material volume and prepare difficult or oversized feedstock for the next processing stage.
Depending on the feedstock and target output, the shredder can be integrated with:
- Feeding conveyors and material handling systems
- Metal detection equipment, where required
- Crushers or granulators for further size reduction
- Washing systems for cleaning and separation
- Dewatering and drying equipment
- Extrusion and pelletizing lines
For rigid and bulky plastic waste, the double-shaft shredder can work as the first size-reduction stage before a GH crusher. For other materials, it can be configured as part of a complete recycling line based on the required capacity, output size, and final recycled product.
The shredder does not complete the entire recycling process on its own. Instead, it creates a more stable and manageable material flow for downstream equipment.
Technical Specifications & Capacity
ACERETECH’s Double-Shaft Plastic Fine Shredder series includes models 750, 900, 1100, 1400, 1600, and 2100.
All models operate at a main shaft speed of 73 rpm. Depending on the model, the rotor diameter is φ400 or φ480, while motor configurations range from 2 × 37 kW to 2 × 160 kW.
| Model | 750 | 900 | 1100 | 1400 | 1600 | 2100 |
| Rotation diameter(mm) |
φ400 |
φ400 | φ400 | φ400 | φ480 | φ480 |
| Main shaft rev(rpm) | 73 | 73 | 73 | 73 | 73 | 73 |
| Number of rotor blades(pcs) | 39x2 | 45x2 | 57x2 | 69x2 | 54x2 | 69x2 |
| Number of stator blades(pcs) | (12+2)x2 | (14+2)x2 | 20x2 | 24x2 | (17+2)x2 | 24x2 |
| Cutting chamber(mm) | 1100x768 | 1100x900 | 1100x1131 | 1100x1362 | 1220x1593 | 1220x2055 |
| Discharge height H1(mm) | 622 | 622 | 622 | 622 | 820 | 820 |
| Screen diameter(mm) | Z40 | Z40 | Z40 | Z40 | Z60 |
Z60
|
| Motor power(kW) | 2x37 | 2x45 | 2x55 | 2x75 | 2x110 | 2x160 |
| Dimension(mm) | 2701x2105x2151 | 2800x2105x2151 | 3520x2259x2151 | 3751x2259x2151 | 4100x1810x2630 | 4860x1810x2630 |
| Weight(kg) | Approx 5700 | Approx 5800 | Approx 7100 | Approx 7500 | Approx 11000 | Approx 13500 |
Actual throughput depends on the material type, feedstock condition, screen configuration, feeding method, and operating conditions. For an accurate recommendation, please provide the material type, required capacity, target output, and available installation space.
Double-Shaft Shredder Application Cases
ACERETECH has applied double-shaft shredding technology to different recycling conditions. Each application requires a configuration based on the feedstock and the required downstream process.
PET Lumps and Straps
PET lumps and straps are tough materials that require strong initial size reduction before further washing, granulation, or recycling. In this application, the double-shaft shredder works with a belt conveyor to improve feeding consistency and prepare the material for downstream processing.
Plastic Pallets
Plastic pallets are large, rigid, and difficult to process in a single crushing stage. In ACERETECH’s pallet recycling solution, the double-shaft shredder performs the initial size reduction before the material enters a GH heavy-duty crusher. This staged process helps reduce the load on the crusher and supports more stable line operation.
Rigid Plastic Recycling
For large rigid plastic items, the double-shaft shredder can be used to reduce oversized material before crushing, washing, and further recycling. The final equipment configuration depends on the material type, contamination level, required output, and washing or pelletizing process.
For model selection or a complete recycling line proposal, contact ACERETECH with your material details, required capacity, target output, and factory layout.
Frequently Asked Questions
ACERETECH has applied double-shaft shredding technology to different recycling conditions. Each application requires a configuration based on the feedstock and the required downstream process.
What is a dual-shaft fine shredder used for in plastic recycling?
A dual-shaft fine shredder is used for the pre-treatment and size reduction of bulky, irregular, medium-hard, or flexible materials. It reduces the material’s bulk volume and prepares it for more stable feeding into downstream equipment such as crushers, granulators, washing systems, or pelletizing lines.
How does a double-shaft fine shredder work?
A double-shaft fine shredder uses two counter-rotating shafts fitted with cutting blades. The shafts pull the material into the cutting chamber, where the blades continuously tear and shear it into smaller, more manageable pieces. The pusherless design supports flexible feeding of irregular or bulky materials.
What materials can a double-shaft fine shredder process?
Depending on the material characteristics and machine configuration, a double-shaft fine shredder can process film, FIBC bags, woven bags, wood, books, PET lumps, plastic pallets, rigid plastics, and other medium-hard or flexible materials. The recommended configuration depends on material size, hardness, bulk density, contamination, moisture, and required output.
Where does a double-shaft shredder fit in a plastic recycling line?
A double-shaft shredder is typically used as a front-end pre-treatment machine. It can be integrated with feeding conveyors, metal detection systems, crushers, granulators, washing and drying systems, or extrusion and pelletizing lines. The final process layout depends on the material and the required output.
How do I choose the right double-shaft shredder model?
ACERETECH offers models from 750 to 2100. Model selection depends on the material type, feedstock size, required capacity, target output, motor configuration, and available installation space. Our engineers can recommend a suitable model after reviewing the material and production requirements.
What information is needed for a shredder quotation?
To recommend a suitable shredder, please provide the material type, material size and condition, contamination or moisture level, required capacity, target output size, existing downstream equipment, power requirements, and available factory space. Photos or videos of the feedstock can also help our engineers prepare a more accurate proposal.
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These terms of service ("Terms", "Agreement") are an agreement between the website ("Website operator", "us", "we" or "our") and you ("User", "you" or "your"). This Agreement sets forth the general terms and conditions of your use of this website and any of its products or services (collectively, "Website" or "Services").
These terms of service ("Terms", "Agreement") are an agreement between the website ("Website operator", "us", "we" or "our") and you ("User", "you" or "your"). This Agreement sets forth the general terms and conditions of your use of this website and any of its products or services (collectively, "Website" or "Services").
These terms of service ("Terms", "Agreement") are an agreement between the website ("Website operator", "us", "we" or "our") and you ("User", "you" or "your"). This Agreement sets forth the general terms and conditions of your use of this website and any of its products or services (collectively, "Website" or "Services").
