TPT November 2008

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T ube Extrusion & D rawing T echnology
November 2008 68 ›
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:
Website:
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
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
(since 1925), Balloffet GmbH (since 1996),
and a worldwide network of agents.
Balloffet – France
Fax: +33 4 74 35 79 01
Email:
Website:
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, 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-
Excellence in tube die drawing technology
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
 Balloffet’s range includes PCD and diamond dies