TPT November 2008

T ube E xtrusion & D rawing T echnology

Excellence in tube die drawing technology

Raw material costs can account for as much as 90 per cent of the manufacturing cost of plastic pipe. Targeting the cost- saving potential in this area, KraussMaffei Berstorff has made it a high priority to develop machines and systems that reduce raw material consumption while maintaining highest pipe quality. KraussMaffei Berstorff’s foam-core pipehead series is headed by two twin-screw extruders (KMD 90-36 B/R and KMD 75-36 B/R) plus a Balloffet, France, is one of the largest worldwide manufacturers of a compete range of diamond dies. The company claims to ensure higher productivity, lower maintenance, high-quality surface conditions, diameter accuracy, and optimum technical characteristics for tube and pipe. To manufacture tubes on a bullblock, the company advises the use of diamond dies to guarantee consistency of the tube’s final diameter. When manufacturing on drawbenches and wire drawing machines, PCD dies are used for a longer die life and a better return on investment. The Balloffet range includes natural diamond dies from 6µ to 2.5mm, mono-

completely reengineered multilayer pipehead (KM 3 LRK 43). The line can produce PVC foamcore pipe with 400mm diameter and 11.7mm wall thickness at a rate of 900kg to 1,000kg per hour. Foaming reduces the density of the pipe’s core layer to as little as 0.6kg per cubic decimetre. This has the effect of reducing the total density of the 3-layer pipe by up to 30 per cent – with proportionate savings in material costs. A typical application crystalline dies from 6µ to 0.5mm, and polycrystalline (PCD) dies from 50µ to 28mm. The company also provides compacting, stranding and special shape dies, along with extrusion tooling (guides and dies), and repolishing equipment. The ISO 9001-2000 company offers a range of services including repolishing, training of operators/technicians at Balloffet or at the customer’s plant. Balloffet is a forerunner in manufacturing innovation (drilling, forming, sizing, polishing), and expert product control. Established in 1870, the company has several subsidiaries: Balloffet Die Corporation USA (since 1904), BDWD UK

 Balloffet ’s range includes PCD and diamond dies

for PVC foam-core pipe is pressure-less wastewater pipe. KraussMaffei is world market leader in machines and systems for plastics and rubber processing. With its three divisions – injection moulding technology, extrusion technology and reaction process machinery – KraussMaffei is a premium partner for the plastics and rubber processing industries worldwide. KraussMaffei Berstorff GmbH – Germany Fax : +49 89 8899 3092 Email : matthias.andreesen@kraussmaffei.com Website : www.kraussmaffei.com (since 1925), Balloffet GmbH (since 1996), and a worldwide network of agents. Balloffet – France Fax : +33 4 74 35 79 01 Email : balloffet@balloffetdie.com Website : www.balloffetdie.com

Innovative PVC foam-core pipeline delivers impressive performance

 KraussMaffei Berstorff has recently supplied this complete extrusion line for PVC foam-core pipe to a Russian customer

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N ovember 2008

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