@article{22049, abstract = {{Um die Materialauswahl für den FDM-Prozess zu steigern, sollten die durch den FDM-Prozess an das Material gestellten Anforderungen bekannt sein. Dazu ist eine von der Maschine und der individuellen Datenaufbereitung möglichst unabhängige Bewertung der FDM-Verarbeitungseignung wünschenswert. In diesem Artikel werden eine Prüfmethode und ein dazu entwickelter Probekörper vorgestellt, mit dem die Schweißnahtfestigkeit verschiedener Polyamid 6 Typen im FDM-Prozess ermittelt und verglichen wird.}}, author = {{Schöppner, Volker and Schumacher, C. and Guntermann, J.}}, isbn = {{1618-8357}}, journal = {{Jahresmagazin Kunststofftechnik}}, number = {{1}}, pages = {{108--114}}, publisher = {{Institut für Wissenschaftliche Veröffentlichungen}}, title = {{{Beurteilung der Schweißnahtfestigkeiten verschiedener Kunststoffe im FDM-Prozess}}}, volume = {{1}}, year = {{2017}}, } @article{22038, abstract = {{Micro Physiological Systems (MPS), also known as Multi-Organ-Chip, Organ-on-a-Chip, or Body-on-a-Chip, are advanced microfluidic systems that allow the cultivation of different types of cells and tissue in just one common circuit. Furthermore, they thus can also adjust the interaction of these different tissues. Perspectival MPS will replace animal testing. For fast and flexible manufacturing and marking of MPS, a concept for a universal micromachining platform has been developed which provides the following latest key technologies: laser micro cutting of polymer foils, laser micro- and sub-micro-structuring of polymer foils, 3D printing of polymer components as well as optical inspection and online process control. The combination of different laser sources, processing optics, inspection systems, and print heads on multiple axes allows the change and exactly positioning to the workpiece during the process. Therewith, the realization of MPS including 3D printed components as well as direct laser interference patterned surfaces for well-defined cell adhesion and product protection is possible. Additional basic technologies for the generation of periodical line-like structures at polycarbonate foils using special Direct Laser Interference Patterning (DLIP) optics as well as for the 3D printing of fluid-tight cell culture reservoirs made of Acrylonitrile Butadiene Styrene directly onto polycarbonate microfluidics were established. A first prototype of the universal micromachining platform combining different lasers with Direct Laser Writing and DLIP is shown. With this laser micro cutting as well as laser micro-structuring of polycarbonate (PC) foils and therewith functionalization for MPS application could be successfully demonstrated.}}, author = {{Moritzer, Elmar and Hirsch, André and Günther, K. and Sonntag, F. and Klotzbach, U. and Lasagni, A.F.}}, journal = {{Micromachines}}, number = {{246}}, publisher = {{MDPI}}, title = {{{Universal Micromachining Platform and Basic Technologies for the Manufacture and Marking of Microphysiological Systems}}}, doi = {{10.3390/mi8080246}}, volume = {{8}}, year = {{2017}}, } @article{22033, abstract = {{The mechanical characterization of fused deposition modeling (FDM) parts is mostly done by static tests. In many applications, parts are also dynamically loaded. Here, fatigue tests can help to identify the expected lifetime of a part. This article discusses the fatigue behavior of FDM specimens manufactured with Ultem 9085. For this, tensile bars are manufactured according to ASTM D638 in different build orientations. Tests are performed in a range of pulsating tensile stresses, and S-N curves are documented for different build orientations. For higher loads, the FDM anisotropy characterizes the lifetime of used specimens, which is similar to static tensile bars. For lower loads, including a higher number of cycles to failure, S-N curves of different build orientations converge. In further tests, tensile bars were chemically smoothed with chloroform vapor. Chemical smoothing reduces surface roughness and increases tensile strength of specimens in the upright build direction. Fatigue tests of chemically treated specimens show no significant lifetime increase.}}, author = {{Fischer, M. and Schöppner, Volker}}, journal = {{JOM: The Journal of The Minerals. Metals & Materials Society (TMS)}}, pages = {{563--568}}, publisher = {{Springer Verlag}}, title = {{{Fatigue Behavior of FDM Parts Manufactured with Ultem 9085}}}, doi = {{10.1007/s11837-016-2197-2}}, year = {{2017}}, } @inproceedings{22023, abstract = {{Fused Deposition Modeling (FDM) is an Additive Manufacturing (AM) technology which is used for prototypes, single-part-production and also small batch productions. For use as a final product, it is important that the parts have good mechanical properties, a high dimensional accuracy and smooth surfaces. The knowledge of the mechanical properties is very important for the design engineer when it comes to the component design. In this paper, investigations were conducted with the polymer ABS-M30 from Stratasys Inc. To achieve a quality improvement of FDM parts, various toolpath parameters and orientations were used. Within the mechanical properties, the tensile, flexural and impact strength were evaluated. Furthermore, the tensile strength of FDM parts is compared to injection molded specimens. With optimized parameters, an increase of the tensile strength by up to 28 % and a doubling of the impact strength were possible.}}, author = {{Knoop, F. and Kloke, A. and Schöppner, Volker}}, booktitle = {{32nd International Conference of the Polymer Processing Society}}, publisher = {{American Institute of Physics}}, title = {{{Quality Improvement of FDM Parts by Parameter Optimization }}}, doi = {{10.1063/1.5016790}}, volume = {{32}}, year = {{2017}}, } @inproceedings{27201, author = {{Schöppner, Volker and Schadomsky, Michael and Walter, J.}}, booktitle = {{25. Fachtagung Technomer}}, location = {{Chemnitz (Deutschland)}}, title = {{{Bestimmung der Mischgüte bei Kautschukstiftextrudern auf Basis experimenteller und simulativer Methoden}}}, year = {{2017}}, } @inproceedings{27220, author = {{Schöppner, Volker and Lakemeyer, P. and Wübbeke, Andrea and Geißler, S. and Schmidt, M.}}, booktitle = {{70th Annual Assembly of the International Institute of Welding (IIW)}}, location = {{Shanghai (China)}}, title = {{{Investigation of Residual Stress in Laser Transmission Welding of Polypropylene}}}, year = {{2017}}, } @phdthesis{24774, abstract = {{In dieser Arbeit wurde ein Prozessverständnis für das FDM-Verfahren hinsichtlich der Verarbeitung des Materials Ultem*9085 aufgebaut. Es wurde der Einfluss des Materials, des Prozesses und der Maschine auf die resultierende Bauteilqualität untersucht. Die Materialqualität unterschiedlicher Chargen zeigt, dass Feuchtigkeit im Material die Strangablage beeinflusst. Die Analyse der Prozessparameter, die anhand der Kurzzeitfestigkeiten analysiert wurden, zeigt einen starken Einfluss der Aufbauorientierung. Mittels einer Parameteroptimierung können ferner gleiche Festigkeitswerte wie aus dem Spritzgießprozess erreicht werden. Bei der Untersuchung der Langzeitfestigkeiten wurde festgestellt, dass sich die Festigkeitswerte bei unterschiedlichen Umgebungsbedingungen nicht ändern. Die Untersuchung einiger Anlagenkomponenten auf die resultierende Oberflächengüte, Geometriegenauigkeit und Festigkeitseigenschaften kann den Einfluss von u. a. der Bauraum- sowie der Düsentemperaturen auf die Bauteilqualität zeigen. Zuletzt wurde die Möglichkeit einer Leichtbauanwendung anhand von Sandwich-Prüfkörpern untersucht. Hierbei beeinflussen sowohl die verfahrensunabhängige Mechanik als auch die verfahrensspezifischen Effekte die Festigkeitswerte.}}, author = {{Kloke, Agnes}}, isbn = {{978-3-8440-4489-8}}, pages = {{172}}, publisher = {{Shaker Verlag}}, title = {{{Untersuchung der Werkstoff-, Prozess- und Bauteileigenschaften beim Fused Deposition Modeling Verfahren}}}, volume = {{4}}, year = {{2016}}, } @inproceedings{27245, author = {{Schöppner, Volker and Westhues, K. and Westhues, T}}, booktitle = {{32nd International Conference of the Polymer Processing Society (PPS)}}, location = {{Lyon (Frankreich)}}, title = {{{A New Sample Preparation Method to Investigate Melting Phenomena within a Partly Filled Melting Zone Of Co-Rotating Twin Screw Extruders}}}, year = {{2016}}, } @inproceedings{27246, author = {{Moritzer, Elmar and Hüttner, M. and Henning, Bernd and Webersen, Manuel}}, booktitle = {{32nd International Conference of the Polymer Processing Society (PPS)}}, location = {{Lyon (Frankreich)}}, title = {{{An Approach to Non-Destructive Testing of Aged Polymers}}}, year = {{2016}}, } @article{27248, author = {{Schöppner, Volker and Brockhaus, S. and Penner, C. and Möckel, J.}}, issn = {{0176-1625}}, journal = {{GAK Gummi Fasern Kunststoffe}}, number = {{69. Jg. Heft 7}}, pages = {{410--413}}, title = {{{Auswirkungen von Betriebsparametern in der Heißluftvulkanisation}}}, year = {{2016}}, } @article{27249, author = {{Schöppner, Volker and Littek, S. and Döring, Artjom and Kuckling, Dirk}}, journal = {{Zeitschrift Kunststofftechnik / Journal of Plastics Technology}}, pages = {{18}}, title = {{{Berechnung des Materialabbaus von PP und PS in der Plastifiziereinheit Teil 1: Belastung und Materialmodellierung}}}, year = {{2016}}, } @article{27250, author = {{Moritzer, Elmar and Hüttner, M. and Henning, Bernd and Webersen, Manuel}}, issn = {{1862-4243}}, journal = {{Kunststoffe international}}, number = {{10. Jg. Heft 4}}, pages = {{43--45}}, title = {{{Detecting Molecular Damage - Non-Destructive Characterization of Molecular Changes in Aged Polymers}}}, year = {{2016}}, } @inproceedings{27251, author = {{Moritzer, Elmar and Nordmeyer, T. and Enneking, L. and Grishin, A. and Knospe, A. and Buske, C.}}, booktitle = {{74th Annual Technical Conference of the Society of Plastics Engineers (ANTEC)}}, location = {{Indianapolis (USA)}}, title = {{{Development of an Inline Plasma Treatment During Injection Molding Process}}}, year = {{2016}}, } @inproceedings{27252, author = {{Moritzer, Elmar and Budde, C. and Hüttner, M.}}, booktitle = {{Joining in Car Body Engineering 2016}}, location = {{Bad Nauheim (Deutschland)}}, title = {{{Die Riveting – A New Joining Technology for Composite Sheet-Metal-Hybrid Joints}}}, year = {{2016}}, } @inproceedings{27253, author = {{Moritzer, Elmar and Hüttner, M. and Henning, Bernd and Webersen, Manuel}}, booktitle = {{Safe and Reliable Structures}}, location = {{Dalheim (Deutschland)}}, title = {{{Ein Ansatz zur zerstörungsfreien Prüfung von hydrothermisch gealterten Polymeren}}}, year = {{2016}}, } @inproceedings{27254, author = {{Moritzer, Elmar and Martin, Y.}}, booktitle = {{32nd International Conference of the Polymer Processing Society (PPS)}}, location = {{Lyon (Frankreich)}}, title = {{{Experimental Investigations on the Fibre Length Degradation in Injection Moulds}}}, year = {{2016}}, } @inproceedings{27255, author = {{Moritzer, Elmar and Brockhaus, S. and Heiderich, G.}}, booktitle = {{74th Annual Technical Conference of the Society of Plastics Engineers (ANTEC)}}, location = {{Indianapolis (USA)}}, title = {{{Fiber Length Degradation of Glass Fiber-Reinforced Polypropylene during Shearing}}}, year = {{2016}}, } @inproceedings{27256, author = {{Moritzer, Elmar and Brockhaus, S. and Heiderich, G.}}, booktitle = {{16th Annual International Polymer Colloquium (IPC)}}, location = {{Madison (USA)}}, title = {{{Fiber Length Degradation of Glass Fiber-Reinforced Polypropylene during Shearing}}}, year = {{2016}}, } @inproceedings{27257, author = {{Moritzer, Elmar and Heiderich, G.}}, booktitle = {{32nd International Conference of the Polymer Processing Society (PPS)}}, location = {{Lyon (Frankreich)}}, title = {{{Fiber Length Reduction during Shearing in Polymer Processing}}}, year = {{2016}}, } @inproceedings{27258, author = {{Schöppner, Volker and Pohl, M.}}, booktitle = {{32nd International Conference of the Polymer Processing Society (PPS)}}, location = {{Lyon (Frankreich)}}, title = {{{First Insight into the High Speed Extrusion of Polycarbonate}}}, year = {{2016}}, }