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Truetzschler launches Magnotop flat tops for carding

Truetzschler, a textile machinery company that specialises in installations and accessories for spinning preparation, the nonwovens, and man-made fibre industry, has launched the new Magnotop flat tops for card clothing. Flat tops have the task to retain the fibres so that the cylinder wire can fully develop its carding effect in textile production. 

Frequent and quick lot-changes present the same challenges as in the case of changes in raw material varieties as far as card settings go – both calls for frequent changes of flat tops. This was a major challenge involving a colossal waste of time, manpower, and cost, until Truetzschler together with Trützschler Card Clothing, released the Magnotop flat tops, Truetzschler said. 

Usually, for replacement of a set of flat tops, each one of the 84 flat bars has to be manually transported to the card accessories room and needs to be handled several times during the process of replacement. With Magnotop, this needs to be done only once – that too just near the card – and this reduces time for changing a set of flat tops from approximately 14 hours to less than 2 hours. 

The Magnotop system uses neodymium magnets, which are the strongest permanent magnets ever: one neodymium magnet, smaller than a mobile phone, can easily lift or hold a weight of 100 kg. 

The patented Magnotop flat tops use these neodymium high energy magnets in the form of strips. On the back of the clothing strips there is a matching thin, flexible metal strip. Once positioned on the flat bar, the clothing strips independently occupy their precise position and are securely attached – the magnetic forces hugely exceed the carding forces. Thus, the fastening is absolutely reliable; yet on the other hand, the clothing strips can simply be peeled off from the flat bar with little tool provided with the clothing set. 

Today, replacement of cylinder and doffer clothing directly on the card is a routine matter. Now with Magnotop the complete replacement of flat tops is also possible on the card in a simple and direct manner. Another advantage is the quick and easy testing of new types of flat tops. Further, the previously used Magnotop clothing strips which are still in working order can be reused at any time. Magnotop also eliminates the need for an expensive flat workshop as the clothing strips can be replaced directly on the card. 

The patented Magnotop fastening system also reduces tolerances. This simplifies precision setting of flat tops even more, which in turn improves the carding results and leads to less neps in the yarn. The usual levelling that compensates deformations caused by clip assembly can be eliminated since Magnotop automatically has a perfect fit. This prolongs the service life of the flat bars by a whole grinding cycle.

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