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Drawer filter magnets for training centre

16 July 2018

The Polymer Training & Innovation Centre in Telford has added a Bunting magnetics drawer filter magnet to equipment at the facility. The FF drawer filter magnet attracts and captures any fine and coarse magnetically susceptible materials that enter the plastics manufacturing process.

Technical trainer, Andrew Dermody, explains the importance of practical training on the equipment: “We have great support from the industry and equipment manufacturers such as Bunting. This support means that we can deliver practical training, with a hands-on approach, and that is the best way for our delegates to learn. Having the Drawer Filter Magnet installed exactly as it would be in a production plant, is an ideal way to show our students best-practice and highlight the importance of metal removal.”

The training facility at Telford was refurbished in early 2017 and Bunting supplied the FF Drawer Filter Magnet in March 2018. The FF Grate Magnet is bolted onto the bottom flange of a Summit Systems fed hopper. The Magnetic Separator has a transparent front plate so that operators are able to see the material passing through or held within the system.  Virgin plastic beads fall from the hopper through two rows of high strength Tube Magnets, which attract and hold any magnetically susceptible materials. The Tube Magnets use ultra-strong, permanent, Neodymium Rare Earth Magnets. The cleaned plastic beads are then fed into the Engel injection moulding machine. Removing all metal contamination ensures that the final plastic product is free from defects and reduces the amount of waste and potential damage to moulding machines.

On a regular frequency, dictated by the amount of metal captured, the Tube Magnets are removed as one complete assembly from the housing and cleaned.  The design of the Drawer Filter Magnet means that removal of the Magnet Assembly is quick and easy, keeping maintenance times to a minimum.

“The Bunting design is good as it is very visible,” said Dermody. “Often Magnetic Separators are placed out of sight in hoppers, which means that they can be forgotten. In this installation, the Drawer Filter Magnet is right in front of the machine operator and the clear front allows easy visual checking of the magnets.”

Bunting also supplied Drawer Filter Magnets for use in the classroom and the Polymer Training & Innovation Centre plans to incorporate ‘metal separation as one of the course topics. Bunting has supplied thousands of units to plastics manufacturing operations globally.

“It is great that delegates are able to see, in practice, the importance of having good Magnetic Separation equipment in the plastics process,” said Tom Higginbottom, Bunting’s sales engineer. “Even with virgin raw materials, there is always a small amount of fine ferrous metal contamination and there is always the risk of larger tramp iron that could seriously damage the injection moulding machine.”