Extrusion International 6-2023

17 Extrusion International 6/2023 An Innovative Partnership Enables Efficient Production Optimisation and Cost-saving In the course of an inno- vative partnership, the two German machine building companies, Hans Weber Maschinenfabrik and Leis- tritz Extrusionstechnik, have implemented a trend-setting project in the field of pipe extrusion. A great treasure trove of experi- ence and the latest technologies, geared to the highest quality level, as well as highly motivated employ- ees – these are the qualities that Leistritz Extrusionstechnik from Nuremberg and Hans Weber Maschinenfabrik fromKronach have in common. Their customer clearly specified the requirements and tasks: the scope of project was a PP-3-layer pipe extru- sion line, consisting of a main extruder (co-rotation twin-screw extruder) for the high-filled middle layer and two co-extruders for the inner and outer layer, as well as a multilayer head. The necessary production steps will be optimised, the production costs will be re- duced and there will be savings in CO 2 and energy costs. Moreover, a further objective was to be able in future to react immediately to possible changes in recipes or market requirements regarding the feed materials. The newly developed complete plant is equipped with a co-rotation twin-screw extruder type ZSE 60 MAXX made by Leistritz and two single-screw extruders type NE3.30, as well as a three-layer pipe head made by Hans Weber Maschinenfabrik. Combined with the respective gravimetric and dosing systems, this system offers clear- ly lower production costs for the customer. Rather than two production steps (production of a compound (pellets) + pipe extrusion), Leistritz and Weber’s system requires only one single step thanks to intelligent in-line compounding. In this case, it mainly saves production time and CO 2 and as a result, makes for an important contribution to climate protection. The high percentage of calcium carbonate CaCO 3 or barium sulphate BaSO 4 for the high-filled middle layer is directly fed to the extruder by a gravimetric dosing system. A melt pump builds up the necessary and stable pressure of the melt. The central line control is achieved by the control system OS5, made by WEBER. This ensures the inte- gration of the downstream assemblies in a flexible and simple way. The complete planning, project management and ex- ecution of this project has been in the hands of a team of experts with employees of the two machine building specialists. Hans Weber Maschinenfabrik GmbH www.hansweber.de Leistritz Extrusionstechnik GmbH www.leistritz.com Guill Ad8230 Spiderless Pipe Die Extrusion International 2023 10 Pike Street West Warwick, RI 02893 Email: sales@guill.com New Spiderless Pipe Die Guill just launched its Spiderless Pipe Die , a new offering in extrusion. Capable of providing a finished extrusion with OD from 2”-15” and available in 4140 steel or stainless with heat treating, it’s ideal for tube and pipe producers for large diameter capabilities. With its focus on precision tooling thanks to extensive experience in medical tubing, flow analysis and Guill’s ISO 9001 and AS9100 (Aerospace) quality systems, this new design offers increased material savings. For more information, visit www.guill.com/series/900-series