Extruder technology | 2016
Whether it’s multilayer die heads, redesigned screws or improved processing units, the latest advances in pipe extrusion technologies – all on show at K2016 – will boost throughput and quality
K2016: technology in the pipeline
Throughput is especially important in the plastic pipes sector, so there is no shortage of new machinery at K2016 that will allow extruders to boost their output – often in a smaller space, and far more efficiently that before. KraussMaffei Berstorff will show visitors how its 36D twin-screw extruders can boost PVC pipe produc- tion with minimum space requirements. At the event, two KMD 108-36 E2/R twin-screw
extruders will produce pipe at throughputs up to 2000kg/h – in around two-thirds of the usual space, says the company. “This system is of particular interest to processors who manufacture PVC standard pipes in large quantities and must focus on cost-effectiveness,” said Peter Roos, president of the extrusion technology business. “Higher output with a smaller footprint cuts production costs over the long term.” The energy requirements are also lower compared to
a larger extruder that uses the twin strand. The combination saves 0.02kW per hour, for each kg of material throughput compared to a KMD 164-32/R. The product is used with the KM-RK 23-250 pipe
head, from the newly designed pipe head generation designed for a large diameter range with very high outputs. Design features such as flow channel volume and mandrel ridges configured for optimum flow make the pipe head suitable for high-performance extrusion
www.pipeandprofile.com
with consistently high quality, says the company. The main focus of the 36D twin-screw extruder
process concept is on a long pre-heating length, which ensures a balance of shearing energy and heating energy, leading to optimal material processing and high melt homogeneity. In addition, it ensures low compres- sion values in the area of the throttle zones. Wear- resistance is guaranteed by deep-nitrided barrels and a molybdenum welded layer on the screw threads – al- lowing it to process highly filled PVC compounds. The company will also present the largest version of its QuickSwitch pipe die technology – with a version that efficiently changes dimensions for the 280-500mm diameter range. In pipe production, material accounts for up to 70%
of the cost, so processors want to produce as little scrap as possible. “This system is of particular interest for large pipe
diameters, as in this application the quantity of waste is limited to a tapered piece of approximately three to six metres,” said Roos. QuickSwitch also helps to conserve raw material, so that it is used as efficiently as possible, he added. “Every processor wants to produce as little excess
pipe weight as possible, because this has negative effects on its balance sheet,” he said. The technology enables all commonly used polyole-
October 2016 | PIPE & PROFILE EXTRUSION 33
Among other innovations,
KraussMaffei Berstorff will present the
largest version of its QuickS- witch pipe die technology
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64
