Roth Composite Machinery Hall 8 / A21

Roth Composite Machinery presents innovative length cutting system

The specialist in mechanical engineering will present an innovative, swivelling length cutting system for its knife pleating machines for the production of filters for the first time. These filters are used in a wide range of applications.

The new length cutting system enables an increase in production output, as the maximum width of the filter material is fed into the machine and the filters are cut through in individual widths lengthwise to the material web. Winfried Schäfer, Senior Sales Manager at Roth Composite Machinery, explains this with an example: "If our customer wants to produce ten centimetre high filters, he will get ten times the amount of filters in one production run with a filter material of one metre width compared to production with only one filter height. Therefore, length cutting systems have established themselves in the market. For better and risk-free handling in the production process, we have further developed the positioning of the cutter in the machine. This brings a number of advantages for our customers."

Innovative: Length cutter can be swivelled

The machine design developed by Roth Composite Machinery features the length cutter directly in front of the folding knives. "For safety and ergonomic reasons, we have designed the complete infeed table, including the cutter, to swivel. The operator can swivel the table by 90 degrees in a position provided for this purpose, so that the cutter practically swings out of the machine. The swivel position is deliberately chosen at the centre of gravity of the infeed table so that the swivelling process can be carried out easily," explains Winfried Schäfer. The operator can make the necessary adjustments on the length cutter directly and without physical exertion. Alternatively, the knife shafts could simply

be removed by loosening two screws each and replaced with preset shafts. This saves adjustment and set-up times, Winfried Schäfer continues.

Compared to standard cutting systems, the new process from Roth Composite Machinery increases the safety of the machine operator, as adjustment work is considerably simplified. The upper cutter in particular has sharp knives that pose a risk of injury to the operator during machine set-up.

The cutting system is based on the principle of scissor cutting and works with round lower and upper knives. These run at a speed set by the machine – corresponding to the folding speed. The different diameters of the lower and upper knives create a self-sharpening effect.

Represented worldwide

Roth Composite Machinery offers a wide range of mechanically and servo-motorised controlled knife pleating machines, rotary pleating machines and minipleat systems. The range includes solutions for the production of filters for the filtration of gases, oils, fuels, liquids and for cleanroom technology. The company addresses the automotive and aerospace industries as well as medical technology, the chemical industry, IT technology and the household goods sector. A worldwide network of representatives guarantees service at short notice. Customised design and equipment of machines exactly according to customer requirements is one of the great strengths of Roth Composite Machinery.

For better and risk-free handling in the production process, Roth Composite Machinery has further developed the positioning of the cutting system in the machine.

Roth Composite Machinery presents Minipleat System MPS

Roth Composite Machinery from Burgwald/Germany offers a broad range of mechanically controlled and servo-driven knife pleating machines and rotary pleating equipment. The machines are available worldwide.

For the manufacture of filters being used wherever the air has to be particularly clean, Roth offers minipleat systems. The filters having been manufactured by this are suitable for ventilation systems in residential and public buildings, in hospitals and for vacuum cleaners, gas masks or exhaust systems. The minipleat system MPS takes endlessly folded material from a pleating machine, stretches it out and is coating it to the left and the right side by using so-called hotmelt beads. These are beads of hotmelt materials achieving a permanent bonding when cooling. Being raised to a bellow, the hotmelt beads come into contact and stick together. So, the sensitive filter material is protected and stabilized.

The Roth minipleat system can apply either solid or foamed hotmelt beads. The use of foamed beads is realizing savings of up to 50 percent hotmelt due to the small air bubbles being integrated in the hotmelt. A later retrofit of the machines being supplied can be carried out easily and cost-effectively.

Technology in detail

Roth’s minipleat machine is processing material widths of 600 to 1200 millimeters. The application system is a hotmelt tank unit with heated hoses and two mutiple bead heads, being able to intermit every single bead for coatings on the left and the right side, where the bead distance could be 25 mm or 25,4mm. On request, special dimensions as to the working widths and bead distances can be realized. The machine is suitable for pleat heights of up to 240 millimetres when having a working speed of about 15 metres per minute, depending on the material and pleat height. The system can be positioned after any kind of pleating machine. The feeding area is equipped with various guide rollers. For adapting the hotmelt temperature at the time of the pleat gathering, a height-adjustable roller is integrated.

Gathering rollers enable the material transport through the machine and the raising of the pleats. For transportation of the endless glued and gathered pleat pack, a transport belt and a hold-down device are integrated. The control is effected via an industrial PC with touch panel. The system velocity can be adjusted according the production process.

DATA & FACTS

Modular Hotmelt Application System Minipleat MPS

Working widths: 600 - 1200 mm or according to the customer’s request

Application system: hotmelt heads being able to intermit

Bead distance: 25 mm, 25.4 mm or according to the customer’s request

Pleat heights: 20 – 240 mm

Speed: approx. 15 m/minute, depending on the pleat height and material

Hotmelt: standard EVA, other types upon request