@article{63784,
  author       = {{Trienens, Dorte and Brüning, Florian and Schöppner, Volker}},
  journal      = {{kunststoffland NRW report}},
  title        = {{{Wo Forschung, KI und Praxis aufeinandertreffen}}},
  volume       = {{03-2025}},
  year         = {{2026}},
}

@misc{65010,
  author       = {{Landgräber, Jan and Schöppner, Volker and Brüning, Florian}},
  booktitle    = {{Kunststoffe}},
  number       = {{01}},
  pages        = {{22 -- 25}},
  title        = {{{Der Einzug als Schlüssel zum Erfolg: Untersuchung des Einzugsverhaltens bei Spritzgießaggregaten}}},
  year         = {{2026}},
}

@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}},
}

@inproceedings{65041,
  author       = {{Landgräber, Jan and Schöppner, Volker}},
  title        = {{{Verbesserung des Einzugsverhaltens im Spritzgießprozess - Numerik und Experiment}}},
  year         = {{2026}},
}

@article{63455,
  author       = {{Arndt, Theresa and Schöppner, Volker}},
  journal      = {{Joining Plastics}},
  keywords     = {{Schweißen, Ultraschall, weld seam quality}},
  number       = {{3-4}},
  pages        = {{166–174}},
  title        = {{{Ambossfreies Ultraschallschweißen für nur einseitig zugängliche Schweißsituationen}}},
  volume       = {{19}},
  year         = {{2025}},
}

@article{65011,
  abstract     = {{<jats:title>Abstract</jats:title>
                  <jats:p>Design of single screw machines for polymer processing often focuses on the melt dominated areas of the screw. However, solids conveying is a key aspect for processes with high screw speeds, grooved feed sections, small screw diameters and material with low bulk density. In injection moulding, throughput limitations are highly relevant in packaging applications as due to low cooling times, plasticizing affects the cycle time. In addition, insufficient solids conveying is a primary cause for air residues in the melt and final product. Therefore, well-designed feed sections are required, especially as direct processing of regrind in recycling applications becomes more relevant due to governmental restrictions. Existing models for injection moulding are based on analytical equations and do not allow to assess new feed sections and feed opening designs, adapted to high screw speeds or regrind. In this paper, numerical simulations based on the Discrete Element Method (DEM), previously used in the field of extrusion, are carried out. In order to replicate the cyclic, superimposed rotation and translation of the screw, a coupled approach of DEM and Multibody Systems Simulation (MBS) is pursued. To verify the accuracy of such coupled simulations, a special test setup is added to a conventional injection moulding machine. Pure solids conveying is investigated, as DEM does not accommodate for large plastic deformations or melting. Different screw and intake designs as well as smooth and grooved barrels are investigated. Selected resins, pellet shapes and regrind are processed, varying the processing parameters and comparing the results to the simulation. The coupled approach replicates reality well in terms of throughput, confirming that DEM can be utilised to further investigate process phenomena and develop calculation models for solids conveying in injection moulding.</jats:p>}},
  author       = {{Landgräber, Jan and Schöppner, Volker and Brüning, Florian}},
  issn         = {{0930-777X}},
  journal      = {{International Polymer Processing}},
  number       = {{1}},
  pages        = {{1--14}},
  publisher    = {{Walter de Gruyter GmbH}},
  title        = {{{Assessing solids conveying in injection moulding machines using coupled numerical simulations based on the discrete element method (DEM) and multibody systems (MBS)}}},
  doi          = {{10.1515/ipp-2025-0065}},
  volume       = {{41}},
  year         = {{2025}},
}

@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{65006,
  author       = {{Knaup, Felix and Brüning, Florian and Schöppner, Volker}},
  booktitle    = {{Technomer 2025 29. Fachtagung}},
  isbn         = {{978-3-939382-17-1}},
  keywords     = {{Aufschmelzen, Aufschmelzmodellierung, Feststoffbett, melting modeling}},
  title        = {{{Bestimmung der Feststoffbettfestigkeit zur Vorhersage von Feststoffbettbrüchen im Einschneckenextruder}}},
  year         = {{2025}},
}

@inproceedings{65003,
  author       = {{Kleinschmidt, Dennis and Schöppner, Volker}},
  booktitle    = {{RubberCon 2025}},
  editor       = {{Gummitekniska Förening, Sveriges}},
  keywords     = {{Kautschuk, Rheologie, Wandgleiten}},
  title        = {{{Characterization of the wall slip behavior of filled rubber compounds considering the critical wall shear stress}}},
  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{65000,
  author       = {{Hanselle, Felix Paul and Schöppner, Volker and Brüning, Florian}},
  journal      = {{International Polymer Processing}},
  keywords     = {{Druckabhängigkeit, Rheologie, Simulation, Spritzgießen, Viskosität}},
  title        = {{{Consideration of modeled pressure dependent viscosity data in injection molding simulation}}},
  doi          = {{10.1515/ipp-2025-0074}},
  year         = {{2025}},
}

@inproceedings{65213,
  author       = {{Petzke, Jonas Dirk Rudolf Helmut and Schöppner, Volker}},
  title        = {{{Thermo-Chemical Devulcanization of Sulfur-Cured Styrene-Butadiene Rubber (SBR) Using Diphenyldisulfide (DPDS)}}},
  year         = {{2025}},
}

@inproceedings{59158,
  author       = {{Schöppner, Volker and Arndt, Theresa}},
  booktitle    = {{DVS Plenarsitzung AG W4 Fügen von Kunststoffen}},
  publisher    = {{DVS}},
  title        = {{{Ambossfreies Ultraschallschweißen für nur einseitig zugängliche Schweißsituationen}}},
  year         = {{2024}},
}

@inproceedings{59157,
  author       = {{Schöppner, Volker and Arndt, Theresa}},
  booktitle    = {{DVS Sitzung FA11 - Kunststofffügen}},
  publisher    = {{DVS}},
  title        = {{{Anbossfreies Ultraschallschweißen für nur einseitig zugängliche Schweißsituationen}}},
  year         = {{2024}},
}

@inproceedings{59162,
  author       = {{Schöppner, Volker and Arndt, Theresa}},
  booktitle    = {{DVS Sitzung FA11 - Kunststofffügen}},
  publisher    = {{DVS}},
  title        = {{{Ambossfreies Ultraschallschweißen für nur einseitig zugängliche Schweißsituationen}}},
  year         = {{2024}},
}

@article{59135,
  abstract     = {{Compounding is an important step in processing base polymers and is used to incorporate various additives into a polymer. For this purpose, different screw elements are used for dispersive and distributive mixing on a co-rotating twin-screw extruder. Optimising the screw configuration requires precise knowledge of the screw elements’ mixing properties, which have not been thoroughly investigated. This study analyses the mixing behaviour of individual screw elements regarding dispersive and distributive mixing using 3D CFD flow simulations with subsequent particle tracking. For distributive mixing, the particle distribution behind the screw elements in the XY plane is analysed and the mixing index MQ, which relates the standard deviation and the mean value of the triangular areas between the particles, is calculated. For dispersive mixing, the maximum shear stress on the particle path and the integral of the shear stress over the residence time of each individual particle are determined. The results show that screw element geometry and rotation speed have a significant influence on dispersive and distributive mixing. In addition, better dispersive mixing is achievable with highly viscous materials. These findings enable the optimisation of the mixing zone of a co-rotating twin-screw extruder for the efficient mixing of mineral fillers.}},
  author       = {{Oldemeier, Jan Philipp and Schöppner, Volker}},
  journal      = {{Polymers}},
  keywords     = {{Compoundieren, disperses Mischen, distributives Mischen, Schneckenelemente}},
  number       = {{21}},
  title        = {{{Analysis of the Dispersive and Distributive Mixing Effect of Screw Elements on the Co-Rotating Twin-Screw Extruder with Particle Tracking}}},
  doi          = {{10.3390/polym16212952}},
  volume       = {{16}},
  year         = {{2024}},
}

@inproceedings{59101,
  author       = {{Schöppner, Volker and Arndt, Theresa}},
  booktitle    = {{The 2nd International Symposium on Plastics Technology}},
  editor       = {{Proceedings, AIP-Conference}},
  isbn         = {{9780735448452}},
  publisher    = {{{AIP Publishing}}},
  title        = {{{Development of scale-up rules for the quasi-simultaneous laser transmission welding (LTW) of thermoplastics}}},
  volume       = {{355}},
  year         = {{2024}},
}

@article{59129,
  author       = {{Schöppner, Volker and Trienens, Dorte and Bäck, Thomas and Tsi-Nda Lontsi, Seraphin and Krause, Peter and Budde, Finn}},
  journal      = {{Polymers}},
  number       = {{9}},
  pages        = {{1197}},
  title        = {{{Method Development for the Prediction of Melt Quality in the Extrusion Process}}},
  doi          = {{10.3390/polym16091197}},
  volume       = {{16}},
  year         = {{2024}},
}

@article{59134,
  author       = {{Austermeier, Laura and Schöppner, Volker}},
  journal      = {{37th International Conference of the Polymer Processing Society}},
  keywords     = {{Compoundieren, Doppelschneckenextruder, Drehmoment, Energieeintrag, Feststoffförderung, Schneckenelemente}},
  title        = {{{Load Differences between the Screws in the Solids Conveying Zone of Co-Rotating Twin-Screw Extruders}}},
  year         = {{2024}},
}