Green, flexible and resilient: PET straps

Green, flexible and resilient: PET straps

A good half of the output fom the production site of Delta Stahl is being strapped by TITAN PET straps and thus reducing the use of steal straps in many cases.

A shiny green strap wraps itself around the package made of sheet steel panel. An employee inserts the end of the PET straps into the rail of a hand-held machine. One can only hear a short buzzing sound and the machine has already pulled the straps tight – at a tension level of 5,000 Newton. Eventually it is the temperature of 220 degrees Celsius inside the machine that makes sure the straps are being welded firmly so that they can maintain the tension. Then a crane lifts the package weighing several tons up high and lets it float through the halls of Delta Stahl to its designated storage area.

18,000 tons of sheet steel pass through the halls of Delta Stahl every month. It is here where the huge coils are being processed into panels and slit strips. Carried by wagon trains and lorries they arrive directly in the manufacturing halls located in Barsinghausen close to Hannover. “A good half of these are being strapped with PET straps by TITAN”, explains Production Manager Ernst Köppler.

But prior to that, a few work steps need to be undertaken. The big sheet steel coils are being uncoiled and fine-levelled. Then the sheet is cut under the swing beam shears at 80 metres per minute. The shears manage 120 cuts per minute. Magnetic belts pick up the finished panels and drop them at the stacking point. With lengths of up to eight metres packages weighing up to five tons are thus being generated.

That’s where TITAN’s PET strap comes in. Because in order for the packages to be send to the customer wrapped up safely, they have to be strapped professionally. “The PET strap is suited best for that kind of job, since due to its flexibility it automatically pulls itself back into the original shape even if the package got shifted during transportation. The material always keeps well secured. In contrast steel strapping would stretch”, explains Edward McGinty, TITAN’s Product Manager for plastic hand-held devices. Furthermore the flexible PET strap also holds a minimised risk of damaging the material. According to McGinty this is extremely important “since the material has to be delivered to the customer in perfect condition”.

McGinty and his colleague Frank Börtling (PW Lenzen) visit Delta Stahl on a regular basis in order to check the hand-held machines of the TP 500-series. Börtling examines the welding of the PET strap with a well-schooled eye. From that he can detect if the compact welding engine inside works correctly. With its 16,000 revolutions per minute it makes the rippeled surface swing. The friction with it heats the PET straps, which melt and can be welded that way. “The properly welded PET has a breaking load of 1,400 Newton”, emphasises Börtling.

There’s yet another advantage to the PET strap: At Delta Stahl it replaces roundabout 200 tons of steel strapping and therewith reduces 50 percent of the running costs. In this way the costs for tools already amortise within the first six months.

The people at Delta Stahl completely rely upon TITAN’s green strap. Almost 100 kilometres of it are being used in Barsinghausen every month. Several hand-held devices are currently being deployed in order to handle the load. Because only perfectly packaged sheet steels arrive at the customer’s location safe and sound. No matter how it shall be used – as a roof, wall or air duct, as a cableway, as a component for household appliances or in the automotive industry: The sheet has to be immaculate.

Marit Schulte

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