This roller screen is one of the most robust and efficient way to separate plastic pieces by size in plastic recycling. Sometimes referred to as a roller screen, this system offers an excellent solution for high efficiency screening and separation of plastic bottles, cardboard, or any given material by size.
As you can see in this video, there are rotating rollers that push the feedstock forward. Larger items stay on top while smaller sized “fines” fall through the gaps between the rollers. These are collected at the bottom on a separate conveyor system.
A major advantage of this system is that it is suitable for a variety of materials including wet and sticky ones. Compared with the traditional vibrating screen, the roller screen is not easily clogged and offers a higher separation efficiency.
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Frequently Asked Questions
How does a roller or disc screen work?
Rotating rollers push the feedstock forward; larger items stay on top while smaller fines fall through the gaps between the rollers and are collected on a separate conveyor at the bottom. The gap between rollers sets the cut size, so the screen sorts material into size fractions in a single pass.
What materials can the roller screen separate?
It is suitable for a wide variety of materials, including plastic bottles, cardboard, and other recyclables, and notably wet and sticky materials that clog traditional vibrating screens. The rotating action keeps the gaps clear, giving higher separation efficiency on difficult feedstocks.
What are the advantages over a traditional vibrating screen?
The roller screen resists clogging on wet and sticky materials, offers higher separation efficiency, and handles robust heavy-duty duty cycles. Unlike vibrating screens that blind over with fines, the rotating rollers continuously clear the gaps, which reduces downtime spent on cleaning.
Where does the roller screen fit in a recycling line?
It typically sits at the front of the line as a pre-sorting stage: mixed feedstock is size-separated before granulation or washing, so fines and contaminants are removed early. This protects downstream machines from abrasive fines and improves the consistency of material entering the wash line.
What capacity and sizing options are available?
Throughput depends on roller width, length, gap size, and feedstock characteristics. Screens can be sized to match lines from a few hundred kg/h up to several tons per hour. Share your material types and target throughput with ASG to get the right configuration.
What maintenance does the roller screen require?
The robust design needs little upkeep: regularly check roller bearings and drives, verify that gap settings have not drifted, and inspect roller surfaces for wear. Because the system self-clears, cleaning is minimal compared to vibrating screens; just clear any wrapped film or stringy material periodically.