@article{64997, author = {{Trienens, Dorte and Brüning, Florian and Schöppner, Volker}}, journal = {{kunststoffland NRW report}}, keywords = {{extrusion, KI, Simulation}}, number = {{03-2025}}, pages = {{24–25}}, title = {{{Wo Forschung, KI und Praxis aufeinandertreffen}}}, year = {{2026}}, } @inbook{65689, abstract = {{The use of aluminium materials in the structural and bodywork areas of assemblies has proven to be a targeted option for lightweight design. How-ever, the reliable and cost-efficient joining of aluminium components remains a challenge. Mechanical joining methods, such as riveting, are frequently used in the automotive and aerospace construction industries. Rivets are made from heat-treated steels. Compared to steel, the use of aluminium materials for fasten-ers offers several advantages in terms of joining properties, particularly in terms of recyclability, corrosion resistance and reduced weight of the joined structure. Additionally, the manufacturing process is shorter since aluminium fasteners do not require coating. However, aluminium rivets can often not be used due to the insufficient mechanical strength of the fastener material in relation to the joining component materials. This study systematically investigates the requirements for using solid alu-minium self-piercing rivets. The influence of rivet geometry adjustments on the joint quality is analysed using numerical simulation. The results are used to derive and evaluate an optimised rivet geometry for joining pure aluminium sheets. On this basis, solid self-drilling rivets with optimised geometry are manufactured from particle-reinforced aluminium produced in a continuous extrusion process by machining. The integration of particles increases the material’s strength. Exper-imental tests are conducted to evaluate the use of optimised solid self-piercing rivets. The quality-relevant parameters are determined and evaluated based on macrographs of the joints.}}, author = {{Koch, Steffen and Weber, Joshua and Meschut, Gerson and Stadelmann, Claudia and Böhm, Wolfgang and Merklein, Marion}}, booktitle = {{Proceedings in Engineering Mechanics}}, isbn = {{9783032236401}}, issn = {{2731-0221}}, keywords = {{Solid self-piercing riveting cdot particle-reinforced aluminium cdot continuous powder extrusion cdot Joining technology cdot Rivet geometry cdot lightweight design}}, location = {{Coimbra}}, publisher = {{Springer Nature Switzerland}}, title = {{{Particle-Reinforced Aluminium Solid Self-piercing Rivets for Joining Aluminium Alloy Sheets}}}, doi = {{10.1007/978-3-032-23641-8_1}}, year = {{2026}}, } @article{65007, author = {{Knaup, Felix and Schöppner, Volker}}, journal = {{International Polymer Processing}}, keywords = {{CFD simulation, melting modeling, melting process, polymer extrusion, single-screw extruder}}, title = {{{Improvement of a numerical two-phase simulation model for single-screw plasticizing extruders based on experimental investigations}}}, doi = {{10.1515/ipp-2025-0072}}, year = {{2025}}, } @inproceedings{65005, author = {{Knaup, Felix and Brüning, Florian and Schöppner, Volker}}, booktitle = {{Annual Technical Conference of the Society of Plastics Engineers (ANTEC 2025)}}, keywords = {{Aufschmelzen, Aufschmelzmodellierung, delay zone, extrusion, melting modeling}}, title = {{{Improving an Analytical Model of Melting in Single Screw Extruders considering the Delay Zone Length}}}, year = {{2025}}, } @inproceedings{65009, author = {{Schmidt, Leon and Schöppner, Volker and Brüning, Florian}}, booktitle = {{RubberCon 2025}}, editor = {{Gummitekniska Förening, Sveriges and Swedish, Norwegian and Finnish rubber associations}}, keywords = {{extrusion, Kautschuk, Simulation}}, title = {{{Findings on pinless screw design for rubber extrusion}}}, year = {{2025}}, } @article{65008, author = {{Schmidt, Leon and Brüning, Florian}}, journal = {{KGK - Kautschuk Gummi Kunststoffe}}, keywords = {{extrusion, Kautschuk}}, number = {{2/25}}, pages = {{34–40}}, title = {{{Investigation of alternative pinless screw concepts for rubber extrusion}}}, volume = {{78. Jahrgang}}, year = {{2025}}, } @article{65004, author = {{Knaup, Felix and Brüning, Florian}}, journal = {{Extrusion}}, keywords = {{Aufschmelzen, extrusion, Messtechnik}}, pages = {{28–33}}, title = {{{Vergleich experimenteller Methoden zur Untersuchung des Aufschmelzprozesses in Einschneckenextrudern}}}, year = {{2025}}, } @inbook{65240, author = {{Petzke, Jonas Dirk Rudolf Helmut and Schmidt, Leon and Kleinschmidt, Dennis and Brüning, Florian}}, booktitle = {{International Rubber Conference (IRC) 2025, Bangkok, BITEC; e-abstract book}}, keywords = {{distributives Mischen, Extrusion, Kautschuk, Stiftextruder}}, pages = {{150–151}}, title = {{{Experimental Analysis of the Mixing Behavior of Ethylene-Propylene-Diene Rubber (EPDM) in a Rubber Pin Extruder under Variation of Process Parameters and Mixing Elements}}}, year = {{2025}}, } @inproceedings{59123, author = {{Brüning, Florian and Landgräber, Jan}}, booktitle = {{Annual Technical Conference of the Society of Plastics Engineers (ANTEC 2024)}}, keywords = {{extrusion, Feststoffförderung, Reibwerte, Spritzgießen}}, title = {{{Material and process effects on the tribological behavior of polymer bulk materials}}}, year = {{2024}}, } @inproceedings{59128, author = {{Brüning, Florian and Schmidt, Leon}}, booktitle = {{20. Kautschuk-Herbstkolloquium (KHK)}}, editor = {{Institut für Kautschuktechnologie e.V., Deutsches}}, keywords = {{extrusion, Kautschuk, Simulation}}, title = {{{Investigation of alternative screw concepts for rubber extrusion}}}, year = {{2024}}, } @inproceedings{59127, author = {{Schmidt, Leon and Brüning, Florian}}, booktitle = {{Deutsche Kautschuk Tagung 2024 (DKT 2024)}}, keywords = {{extrusion, Kautschuk, Simulation}}, title = {{{Investigation of alternative pinless screw concepts for rubber extrusion}}}, year = {{2024}}, } @article{59243, abstract = {{Most single-screw extruders used in the plastics processing industry are plasticizing extruders, designed to melt solid pellets or powders within the screw channel during processing. In many cases, the efficiency of the melting process acts as the primary throughput-limiting factor. If the material melts too late in the process, it may not be sufficiently mixed, resulting in substandard product quality. Accurate prediction of the melting process is therefore essential for efficient and cost-effective machine design. A practical method for engineers is the modeling of the melting process using mathematical–physical models that can be solved without complex numerical methods. These models enable rapid calculations while still providing sufficient predictive accuracy. This study revisits the modified Tadmor model by Potente, which describes the melting process and predicts the delay-zone length, extending from the hopper front edge to the point of melt pool formation. Based on extensive experimental investigations, this model is adapted by redefining the flow temperatures at the phase boundary and accounting for surface porosity at the beginning of the melting zone. Additionally, the effect of variable solid bed dynamics on model accuracy is examined. Significant model improvements were achieved by accounting for reduced heat flow into the solid bed due to the porous surface structure in the solid conveying zone, along with a new assumption for the flow temperature at the phase boundary between the solid bed and melt film.}}, author = {{Schöppner, Volker and Brüning, Florian and Knaup, Felix}}, journal = {{Polymers}}, keywords = {{delay zone, extrusion, melting modeling}}, number = {{22}}, pages = {{3130}}, title = {{{Improvement in an Analytical Approach for Modeling the Melting Process in Single-Screw Extruders}}}, doi = {{10.3390/polym16223130}}, volume = {{16}}, year = {{2024}}, }