Cost-effective solution for window profiles

KraussMaffei recently teamed with Greiner Extrusion to provide door and window manufacturer Schco International KG, of Milton Keynes, UK, with a cost-effective double-strand extrusion solution for producing five-chamber main window profiles.

The material ratios in Schco’s main window profiles are approximately 60 per cent virgin PVC and 40 per cent regrind. The new system uses two extruders, both of which supply both strands. The melt streams are split via a pressure-optimized channel system so that they reach the dies in the required pattern. The two extruders need to be positioned very close together in order to feed the channel system effectively.

The concept employs two separate KMD 90-36/P profile extruders from KraussMaffei, each on its own base frame. The main control cabinets are positioned at a distance from the extrusion line. Two extra compact control units, positioned close to the extruder output zone, house the die control circuits and the operator panels. Both operator panels (one for each extruder) are on the operator side. Each extruder can be operated separately, or the two extruders can be operated in synchrony, giving Schco maximum flexibility to respond to future requirements.

KraussMaffei Corporation (Florence, Ky.); www.kraussmaffei.com; 859-283-0200 Greiner Extrusion US Inc. (Meadville, Pa.); www.greiner-extrusion.com; 814-333-2060