PROCESSING | MACHINERY
Above: The BBE single-screw extruder is particularly well suited for demanding applications in film production, synthetic fibre spinning, and high-quality PET recycling
between the two large models. The 105 machine with a length of 40D, which covers a range from 1,680 to 2,100 kg/h, offers all the familiar features of previous models and also includes valuable new features. For example, whereas previously the extruder was usually supplied with water for cooling from the service pipe in the processing plant, the new model has its own internal supply. This limits impurities and ensures the supply maintains constant, which increases the lifespan of the engine and gearbox. “The extruder’s own water circuit is so convinc-
ing that we will be providing it for all our models in future,” said Heinrich Dohmann, Director Mechani- cal Engineering. In addition, all SolEX extruders of the New Generation (NG) have a processing unit consisting of an internally grooved barrel in combination with a matching crew and grooved bush geometry, resulting in process advantages such as a reduced axial pressure profile, high specific output rates at low screw speeds, gentle but effective and homogeneous melting perfor- mance, and subsequently reduced energy costs. Compared its predecessor, the NG models achieve around 25% higher output when processing HDPE and even up to 40% higher output with PP. Another company with a presence at K2025 is
BBE, whose single-screw extruders are suitable for a wide range of polymers such as PP, PET, rPET, PA, and PE, and are particularly well suited for de- manding applications in film production, synthetic fibre spinning, and high-quality PET recycling. With screw diameters ranging from 30 to 360 mm, the systems cover a wide processing spectrum and enable throughputs of 3 to 6,000 kg/h, depending on the material and process requirements. In addition to single-screw extruders, the company also offers extrusion cascades for high output rates. CPM’s Ring Extruder technology offers enhance- ment in elongational flow through the multiple
56 COMPOUNDING WORLD | October 2025
intermeshing apex regions due to the multi 12-shaft intermeshing design concept. This design concept incorporates a higher frequency of elongational flow and improves the efficiency of mixing via elonga- tional deformation. The complexity of raw material components in compounding often results in incompatible surface chemistry as well as potential viscosity phase disparity. This is where elongational flow and deformation distinguishes itself from simple shear flow and deformation allowing for a more efficient mixing process, says CPM. The company says its multi-shaft Ring Extruder design with a higher frequency of elongational flow results in a more efficient mixing process with a lower overall energy input into the material system. For example, CPM has validated an average reduction of 35% specific energy input on the Ring Extruder in comparison to a comparable co-rotat- ing twin screw extruder for processing PET.
Homogenisation Austrian company Erema is branching out from single-screw to twin-screw extrusion with its new TwinPro, which aims to combine the advantages of a twin-screw extruder with the strengths of the company’s preconditioning unit (PCU). Working closely with customers, the company has devel- oped a solution adept at recycling production waste consisting of demanding multi-layer films while also opening up new possibilities for thin- walled post-consumer regrind. A key feature of the TwinPro is its highly efficient homogenisation. The first stage takes place in the PCU, which heats, dries, compacts, and buffers the input material. Thanks to Erema’s patented Counter Current technology, the extruder, coupled at a tangent to the PCU, is continuously filled with heated and pre-compacted material. Even with low bulk density material like film waste, the PCU is able to deliver full throughput and covers a wide bandwidth of input materials with bulk densities of 30 to 800 g per litre reliably processed in a single step without the need for separate agglomeration, weighing, or a stuffing unit. The company is also upscaling the Intarema series and launching the 2021 model without a cascade at K2025. Counter Current technology continuously feeds the extruder with preheated material significantly warmer than with convention- al systems. This is a technological advantage, especially for an extruder screw with a large diameter with correspondingly deep screw flights, as the melt is processed more gently with less shearing and without additional particle size reduction making it easier for impurities to be
www.compoundingworld.com
IMAGE: BBE
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 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76
