Extrusion International 5-2022

32 Extrusion International 5/2022 K 2022 N ext-generation extruders from battenfeld-cincinnati have long since established themselves in the market. High output rates at low screw speeds, effective melting performance with low melt temperatures plus a reduced pressure profile and conse - quently less wear on machines – these are the benefits provided by the high- speed solEX NG series. In time for the coming K trade fair, the extruder spe - cialist is now rounding off this series downwards by adding a new solEX NG 45 to the four existing models solEX NG 60, 75, 90 and 120 mm. This latest and smallest model, solEX NG 45, just like the larger models of the series, has a processing unit consisting of an internally grooved barrel com- bined with a matching screw geom- etry. The process technology advan- tages resulting from this combination ensure an extra-high-quality standard for the extruded semi-finished prod - uct. When processing HDPE, these ex - truders also achieve a 25%higher out - put and for PP even of up to 40%. And in addition to that with reduced melt temperatures of about 10 °C below those in conventional extruders. Another advantage resulting from the innovative processing unit of the NG series is the reduction in energy consumption, which is around 15 % lower than the previous solEX series. Consequently, this successful series offers advantages not only in terms of process technology, but in terms of higher energy efficiency as well. Pulsation-Free Passage Through the PVC Die At K, battenfeld-cincinnati will pro- vide information about Steady flow, an additional module tominimize pul- sation in PVC extrusion, thus ensur - ing continuous, even output perfor- mance and consequently reliable high quality in semi-finished products. The patent pending new software module is already in use by several customers and achieves excellent results. Steady flow is one of the modules from bat - tenfeld-cincinnati which optimizes production equipment in the era of Industry 4.0, and facilitates its opera - tion and handling . In PVC processing with counter- rotating twin screw extruders, pul - sations of the material flow are un - avoidable. These fluctuations are caused by the C-shaped chamber profiles formed by the pair of screws. Especially when producing small throughput, for example in the pro - duction of small technical profiles, the fluctuations are more significant. This is why the extrusion specialist batten - feld-cincinnati has now developed the module Steady flow, which harmoniz - es these fluctuations and thus ensures a constant material discharge. For this purpose the melt pressure in front of the extrusion die is measured con - tinuously, and the screw speed during each screw rotation is constantly re- adjusted on the basis of the measured pressure fluctuations. The software includes a learning function, which automatically calculates optimal para- meters for the compensation of pul- sation during the first production run with any new products or new mate- rials. The screw speed correction pa- rameters identified are saved in the product recipe and thus remain avail- able for every new production start- up. Pressure fluctuations are sub - stantially reduced with the result of a low-pulsation melt flow passing into the forming die. The final results are better semi-finished product quality with fewer dimensional fluctuations and consequently optimal utilization of the material. Steady flow can optionally be inte - grated into the BCtouch UX control system of every new PVC extrusion line. But it can also be retrofitted without any problems in existing lines with a modern control system from the UX series. battenfeld-cincinnati www.battenfeld-cincinnati.com K 2022: Halle 16, Stand B19, FG -CE12 Successful Extruder Now Also Available in Size 45