@article{TomaschkoAnnanKrommes2022, author = {Tomaschko, Florian and Annan, Kevin and Krommes, Sandra}, title = {Digitalisierung der Produktion: Ganzheitliche Bewertung}, series = {Zeitschrift f{\"u}r wirtschaftlichen Fabrikbetrieb}, volume = {117}, journal = {Zeitschrift f{\"u}r wirtschaftlichen Fabrikbetrieb}, number = {5}, pages = {321 -- 326}, year = {2022}, abstract = {F{\"u}r die Analyse, Bewertung und Kontrolle von Investitionsentscheidungen bei Erweiterungs- oder Modernisierungs-Investitionen zur Digitalisierung der Produktion fehlt ein methodisches Vorgehen. Ein dreistufiger Ansatz auf Basis geeigneter betriebswirtschaftlicher Kennzahlen wird vorgestellt und am Beispiel eines heterogenen Maschinen- und Anlagenparks f{\"u}r einen digitalen Schatten der Wert- und Stoffstr{\"o}me zur Steigerung der Ressourceneffizienz angewandt.}, language = {de} } @article{HummelObermeierZieretal.2022, author = {Hummel, Sabine and Obermeier, Katharina and Zier, Katja and Krommes, Sandra and Schemme, Michael and Karlinger, Peter}, title = {Analysis of Mechanical Properties Related to Fiber Length of Closed-Loop-Recycled Offcuts of a Thermoplastic Fiber Composites (Organo Sheets)}, series = {Materials}, volume = {15}, journal = {Materials}, number = {11}, pages = {3872}, year = {2022}, abstract = {Increasing demand for energy-efficient means of transport has steadily intensified the trend towards lightweight components. Thermoplastic glass fiber composites (organo sheets) play a major role in the production of functional automotive components. Organo sheets are cut, shaped and functionalized by injection molding to produce hybrid components, such as those used in car door modules. The cutting process produces a considerable amount of production waste, which has thus far been thermally recycled. This study develops a closed mechanical recycling process and analyzes the different steps of the process. The offcuts were shredded using two shredding methods and implemented directly in the injection-molding process. Using tensile tests and impact bending tests, the material properties of the recycled materials were compared with the virgin material. In addition, fiber length degradation via the injection-molding process and the influence of the waterjet-cutting process on the mechanical properties are investigated. Recycled offcuts are both comparable to new material in terms of mechanical properties and usability, and are also economically and ecologically advantageous. Recycling polypropylene waste with glass fiber reinforcement in a closed loop is an effective way to reduce industrial waste in a sustainable and economical production process.}, language = {en} }