Martin specifies Watson-Marlow Bredel for its NT range of rotary diecutters

Martin, specialist manufacturer of equipment for the corrugated industry, is using up to 200 Watson-Marlow Bredel 621F/RE peristaltic pumps per year on its new DRO NT range of rotary diecutters.

The DRO NT machines use up to eight 621F/RE pumps for ink feed, helping to provide printers of corrugated board with better print quality through improved colour register, on items such as point-of-sale cartons.

Jean-Luc Mion, research and development manager at Martin says: “We’ve replaced the gears and installed a motor on each of the print units to get the best register between the print cylinders. Each print unit on the DRO NT is now independently driven by a DC motor and has its own 621F/RE peristaltic pump feeding ink directly onto the chamber doctor blades, giving better control and accuracy."

The smooth pump action keeps the flow of ink constant, eliminating pulsation which can cause a build-up of pressure inside the chamber blades. The flow rate we use is between 2.5 and 3 l/min depending on ink viscosity. We specified peristaltic pumps rather than diaphragm pumps for the new DRO NT because flow rate adjustment on the 621 pump is electronic and only one adjustment is necessary.

“The DRO NT represents 30% of our product range so it was important that all of the equipment used to develop the machine was the highest quality and provided our customers with the best possible printed result. The Watson-Marlow Bredel 600 series pumps are perfect for the job, not just for the excellent quality printed result, but also because of the crucial reduction in time and cost,” concludes Jean-Luc.