Krauss-Maffei has combined two 90-32/P twin-screw extruders with a KMD 50 K/P as co-extruder to save space for a system producing extrusions for window frames at over 900kg/h.
Aluplast, based in Karlsruhe, Germany, a manufacturer of PVC window systems in Europe, has used high-performance extruders from Krauss-Maffei Berstorff since 2005 It operates more than 45 Krauss-Maffei Berstorff extruders at its production plants around the world.
Krauss-Maffei developed a number of different solutions for Aluplast and all of them met the company’s stipulation for compact extrusion lines that can be flexibly installed and moved if necessary.
One of these solutions was the combination of two 90-32/P twin-screw extruders with a KMD 50 K/P as co-extruder.
The configuration only takes up floor space of 2.5m by 5.4m.
Compact and flexible, each processing unit has its own separate base frame so that it can be repositioned with the utmost flexibility.
KMB took a number of steps to save space.
The main switching cabinet for each unit stands at the end of the unit and only small switching cabinets with the necessary control zones and operator panels take up space near the die.
Attaching the converters for the water-cooled AC motors above the gearbox also saves space.
The switching cabinet for the co-extruder is mounted on rollers and can be moved aside to allow access to the main motor.
The unit is not only mechanically flexible, but the control system is also configured for extra flexibility, allowing the two main extruders to be controlled together or separately by a defined master.
This compact, double-strand system for extruding core-technology window profiles achieves throughput of over 900kg/h.
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