Waste Management & Treatment with Rollier MFX and CVX Polyurethane Elastic Mesh (Flip Flop) Screens
The polyurethane mesh screen system with floating frames creates a tensioning and release of each section of the screening surface. This widely known system has been demonstrated to be the only technology that really works for the screening of sticky, light and generally difficult-to-screen materials.
Spanish company ROLLIER develops this type of equipment to provide an exact response to customer needs, doing away with any elements or sophisticated features that might unnecessarily make the machine more expensive.
- The polyurethane elastic mesh is a very suitable tool for recycled materials because it has features that are very different to those of other screening surfaces:
For flat materials such as plastic film or glass container labels: These materials become clogged in the wires of metal mesh. There are no knots in the polyurethane mesh, which
completely eliminates the problem.
- For wires which become stuck in the perforations of the mesh: The polyurethane mesh can be made with round perforations, which, allied a resonant frame system that catapults the particles, reduces this problem greatly.
- For sticky materials: Because the mesh stretches and contracts several times per second, it is practically impossible for the material to stick to the screening surface of a ROLLIER flip-flop screen. ROLLIER has even used this system with meshes without perforations to feed optical separators with materials that stick to even Teflon and polyethylene.
Ultimately, we are talking about a screening surface and vibration type that is very different to other vibratory screens, making this a very advantageous solution, with respect to trommels and disc/star screens also.
ROLLIER offers two drive types, depending on the application and the size of the unit: the linear-motion drive system with vibratory motors (MFX screens) and the circular-motion drive system with external motors (CVX screens). A further example of ROLLIER’s adaptation to the specific needs of each client is that, when there is a risk of small particles falling through the lateral
vents, ROLLIER manufactures the machine with curved meshes.
However, when the screened material is larger, this risk does not occur and ROLLIER makes the machine with a simpler, more cost-effective flat mesh. Watertight and ATEX-compliant versions are also available.
Published in: FuturEnviro, March edition, 2019.