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Case Study

uPVC Extrusion Protection with FF Drawer Magnets

Ferrous metal contamination captured on the magnetic cartridges inside an FF Drawer Magnet

PRODUCT

FF Drawer Magnets

CUSTOMER

uPVC Building Products Manufacturer - Wales, UK

INDUSTRY

Plastics

APPLICATION

uPVC Extrusion and Compounding

QUANTITY

4

Challenge

For manufacturers supplying the building and construction sector, consistency is everything.

A manufacturer in Wales producing uPVC roofline, cladding, and window finishing systems faced an ongoing risk of ferrous metal contamination in their raw material stream. Even small metal fragments in dry uPVC material could mark surface finish, interrupt extrusion, or cause defects that only become visible once the product is installed.

Once these products leave the factory, there is no margin for error.

  • They are installed in plain sight.
  • Defects cannot be hidden.
  • ‘Rework adds cost, waste, and production disruption.

The manufacturer needed a dependable way to remove ferrous contamination before extrusion. The solution had to work with dry, free-flowing uPVC material, protect downstream equipment, and fit into the existing process without added complexity.

Solution

Bunting Magnetics supplied four FF Drawer Magnets, installed at key inspection points where dry uPVC material flows through the system ahead of extrusion.

The FF Drawer Magnets are designed to capture ferrous metal contamination from bulk materials, stopping unwanted metal before it reaches extruders or affects finished product quality. The magnetic elements provide consistent separation while maintaining material flow.

The easy-access drawer design allows operators to inspect and clean the magnets quickly, keeping maintenance time low and performance consistent.

  • No complex controls.
  • No process changes.

Just reliable protection built directly into the production line. 

 

Result

With four FF Drawer Magnets installed, the manufacturer achieved:

  • Consistent removal of ferrous contamination from uPVC raw materials
  • Improved extrusion stability and surface finish quality
  • Reduced risk of visible defects in roofline, cladding, and window products
  • Greater confidence in finished product quality for building and construction applications

Sometimes the most effective solutions are the simplest.

Clean material in.
Consistent product out. 

Bunting_Drawer_Filter_Magnet-135809770
Installed ahead of extrusion, FF Drawer Magnets remove ferrous contamination from dry uPVC material, supporting stable processing and consistent finished quality.

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