Double-Shaft Plastic Shredder

The double shaft shredder machine is a heavy-duty shredding equipment designed for processing large-volume, tough materials that are difficult to handle with single-shaft crushers. Featuring two counter-rotating shafts (with intermeshing blades) and a robust steel frame (thickness 20mm), it achieves efficient shearing and crushing of various solid wastes and raw materials—even those with irregular shapes or high hardness. Equipped with a hydraulic pusher (for automatic material feeding), this machine minimizes manual intervention, reducing labor intensity and improving operational safety. It is indispensable in recycling and waste treatment industries for its strong crushing capacity, wide material adaptability, and low maintenance costs.

Blade System: Adopts D2 tool steel blades (with HRC 55-58 hardness) featuring 4-8 cutting edges (depending on material type). Each blade is precision-ground to ensure sharpness, enabling efficient shearing even for thick plastic sheets (up to 50mm) or rigid plastic pipes. Blades are replaceable individually (without removing the entire shaft), reducing maintenance costs by 40% compared to integrated blade systems.

Crushing Capacity: Processes 500-3000kg/h (adjustable via variable frequency drive) depending on material type—for example, 1500kg/h for PVC pipes and 800kg/h for reinforced plastic pallets. It can shred objects up to 300mm in diameter (e.g., large plastic drums) without pre-cutting, saving pre-processing time.

Safety Design: Equipped with dual overload protection—automatic reverse when torque exceeds 2000N·m (to prevent motor burnout) and a mechanical safety lock (engaged when the machine cover is opened). Emergency stop buttons are installed at 3 locations (front, side, and control panel) for quick shutdown in case of anomalies.

Screen Configuration: Quick-change screens (with snap-on installation) featuring aperture sizes from 10mm to 100mm, allowing easy adjustment of output particle size (e.g., 20mm for plastic regranulation and 80mm for waste volume reduction). The screen’s reinforced structure prevents deformation under high crushing pressure, extending its service life to 3000+ working hours.

Applications

Plastic Recycling: Shreds PVC pipes, PE film, plastic pallets, and defective injection molding parts into uniform particles (with size uniformity ≥92%) for subsequent regranulation. The machine’s low-speed operation (50-100rpm) minimizes material melting, preserving the plastic’s original properties.

Industrial Waste Treatment: Processes metal scraps (e.g., aluminum alloy fragments), wooden pallets, and rubber tires in manufacturing plants—reducing waste volume by 60-80% for cost-effective transportation to landfills or recycling facilities. It can also handle composite materials (e.g., plastic-metal hybrids) by separating components via subsequent sorting.

Municipal Solid Waste: Serves as preprocessing equipment for domestic waste and food waste, shredding large items (e.g., plastic buckets, cardboard boxes) into small pieces to improve the efficiency of subsequent composting (accelerating decomposition by 30%) or incineration (ensuring full combustion).

FAQ

Q: How long do the blades last under normal use?

A: For plastic materials (e.g., PVC, PE), blades can last 300-500 working hours; for harder materials (e.g., metal scraps, reinforced plastics), service life is 150-200 working hours. Blades can be re-sharpened 2-3 times (via professional grinding) before replacement, further extending their usable life.

Q: What power supply is required for the machine?

A: Standard models use 380V/3Phase/50Hz power (with power ratings 15-75kW depending on capacity); customized 220V (for small-scale models) or 440V (for export to North America) versions are available. A dedicated transformer is recommended for unstable power grids to protect the motor.