Modern plastic recycling starts with size separation, the essential step for achieving high-purity output. One machine purpose-built for this task is the Roller (Disc) Screen.
What Is a Roller or Disc Screen?
The Roller Screen is a heavy-duty separator engineered for PET, HDPE, PP, and mixed plastic streams. It uses:
- Multiple rotating shafts, aligned in parallel
- Cast-steel or coated discs, mounted along each shaft
- A simple but effective design that separates materials based on size and behavior
Oversized materials move forward, while smaller fractions drop through, keeping the flow controlled and efficient.
Why Size Separation Matters
In a recycling line, precision sorting is only possible when materials are properly classified upfront. By removing fines, glass shards, and small contaminants early, the Roller Screen:
- Protects downstream optical sorters from damage
- Improves the accuracy of automated sorting
- Extends the lifespan of sensitive equipment
A Real-World Example
During testing, a mix of PET and glass bottles was dropped from about two meters onto the Roller Screen.
- Glass bottles broke on impact, with fragments immediately falling through.
- PET bottles rolled forward intact, ready for the next stage of sorting.
This illustrates the machine’s ability to handle mixed streams while preventing contamination further down the line.
Performance Advantages
Compared to conventional trommels, the Roller Screen delivers:
- High throughput capacity
- Less clogging with its self-cleaning, anti-wrap disc design
- Reduced noise during operation
- Lower maintenance demands and more uptime
The Roller (Disc) Screen is more than a separator—it’s a process optimizer for modern recycling plants. By combining robust design with reliable size-based sorting, it ensures smoother operations, higher purity, and greater efficiency across PET, HDPE, and mixed plastic lines.
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