MACHINERY | EXTRUDER DEVELOPMENTS
decision to buy a new line easy.” However, it is not always about new machines –
Above: Gelpac is running a new three- layer Optimex II line from W&H
Multi-wall conversion Gelpac, a Canadian converter of multi-wall and polyethylene bags, has invested in new equipment from Windmoller & Holscher – including a three-layer Optimex II blown film line – for its production plants in Quebec. The other equipment is a Flexa II printer and
Arcomat palletiser – which are both for converting. “We were looking for a printer for our multiwall equipment and opened talks with W&H subsidiary Garant,” said Jonathan Blanchard Granger, corporate director of engineering and maintenance at Gelpac. This led to purchasing a six-colour Flexa II
printer, for which Gelpac and W&H worked closely to train the operators. In addition, the company bought the Arcomat palletiser – which he says “runs fast and is highly accurate”. While these orders were happening, Gelpac
made further contact about a three-layer blown film line for its plastic bag business. “The Optimex II was attractive because of the film quality and that we could run back-to-back winders with multiple ups,” said Blanchard Granger. “We knew the film quality would be good, and the support from W&H is there – which made the
as W&H recently retrofitted an old blown film line for a customer. Kablonex saw great potential in retrofitting an old blown film extrusion machine to save energy, increase productivity and improve melt quality. The machine was actually a non-W&H machine with an old Mono 120 extruder. Due to its age, it had become very noisy, had poor melt quality and very high power consumption – 244kW during heating, and 95kW during production. Due to limited space in the production area, a flexible design of the new components was crucial. After detailed analysis, the companies agreed on a new 90.30D stand-alone extruder with control and operator panel. Installation was problem-free and the start-up was quick and easy. The results included: n a 36% reduction in energy consumption (155kW during heating, 62kW during production);
n energy savings of €62,000 per year; n a 20% increase in output (limited by die head back pressure);
n better melt quality compared to the old extruder; and,
n silent production. “You can’t hear in the production hall, whether the mono line is working or not,” said Oskar Nawrocki, CEO at Kablonex. “The new stand-alone extruder makes it easier to start up, and this has significantly improved the safety of operations.” The next retrofit project for Kablonex is already underway – with the conversion of a five-layer non-W&H machine into a seven-layer barrier line.
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IMAGE: W&H
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