Extrusion International 2-2022

32 Extrusion International 2/2022 PROFILE EXTRUSION – CASE STUDY The two coextrusion solutions supplied by battenfeld-cincinnati in 2019 proved so perfectly satisfactory to the modern Polish system manufacturer of door and window pro fi les from the very beginning that they immediately placed repeat orders for several more. With the space- saving piggyback models consisting of main extruders and co-extruders, Decco SA based in Suwalki, north-eastern Poland, extends its production equipment to a total of 20 lines. The Austrian extruder specialist battenfeld-cincinnati is currently installing the last models from this year’s major order Polish Profile Manufacturer Expands with Space-Saving Extrusion Solution “We are so pleased with the support and the machine solutions from battenfeld-cincinnati that we have been working continuously with extruders from Vienna right from our startup in 2004 and have kept on buying equip- ment from them ever since”, says Piotr Domaszewski, Managing Director of the Polish pro fi le manufacturer. “The high-performance level of the extruders and their mature process technology support the production of high-grade, durable pro fi les for some 350 customers in 30 different countries.” Again and again, Decco is ex- tending its product portfolio with additional modern, innovative pro fi le systems to meet its customers’ speci fi c circumstances and needs in terms of both design and performance. Here, sustainability and recycling are vital aspects. This is precisely why the Polish plastics processor has now decided to acquire coextrusion solutions which enable the production of multi-colored designs and the integration of recycled material in the middle layer. To this end, Decco uses not only its own production scraps, which are collected and shredded, but also bought-in re- cycled material in the form of PVC regrind. Especially in situations of limited space on the production fl oor, the piggyback solution designed by battenfeld-cin- cinnati provides a space-saving alternative. In all coextru- sion solutions recently delivered to Decco, a twinEX 78-34 with an output of up to 290 kg/h functions as the main extruder, combined with a conEX NG 65 as co-extruder. The conical twin screw extruder with up to 250 kg/h out- put is mounted on top of the parallel extruder, so that fl oor space is required only for the latter. In addition to saving space, the piggyback con fi guration offers further cost advantages through a common control cabinet and easy operation, together with high energy ef fi ciency. The integration of tooling is simple and variable thanks to the fl exible frame structure of the co-extruder. “The space-saving solution was certainly a buying incen- tive for us. But at least just as important are the energy ef fi ciency and performance of the two extruders, which guarantee economical manufacturing of high-quality pro fi les”, Piotr Domaszewski comments. So the twinEX parallel twin screw extruder with 34 D processing length produces excellent results especially in PVC processing with high output, thanks to its long processing unit and optimized screw geometry. The Intracool screw cooling system and the Air Power Cooling system inside the bar- rel provide accurate temperature control and thus high melt and product quality. The latter is also due to the conEX conical twin screw extruder of the new NG gen- eration. Its intelligent process technology concept with an extended preheating zone and optimized screw de- sign ensures high output rates with low shear input. In addition to lowmachine wear, the well-balanced ratio of mechanical and thermal energy input into the melt en- hances the possibilities for processing a great variety of different materials with a single screw con fi guration. Coextrusion with twinEX 78-34 as the main extruder, combined with a conEX NG 65 as co-extruder battenfeld-cincinnati Austria Laxenburger Str. 246, 1230 Wien, Austria www.battenfeld-cincinnati.com Decco SA www.decco.eu