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Rotatives Vibrationsschweißen
(kassel university press, 2017)
Schweißversuche mit den von dem Schweißmaschinenhersteller Fischer Kunststoff-Schweißtechnik GmbH entwickelten Prototypenmaschinen für das neuartige Rotative Vibrationsschweißen zeigen eine vergleichbare erforderliche Prozessführung und die bereits bekannten Ausprägungen der vier Schweißprozessphasen anderer Vibrationsschweißverfahren. Unter Verwendung unterschiedlicher Werkstoffe und Probekörpergeometrien zeigt sich, dass sich die Fügenahteigenschaften von mit dem Rotativen Vibrationsschweißverfahren gefügten ...
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Beitrag zur Herstellung 3-dimensionaler Kunststoffscheiben mit integrierter Funktion zur Veränderung der Transparenz durch Elektrochromie
(kassel university press, 2017)
Ziel dieser Arbeit ist es Möglichkeiten der Kunststoffverarbeitung aufzuzeigen, um feste 3D Bauteile mit elektrochromen (EC) Eigenschaften herzustellen. Die momentanen EC Anwendungen reduzieren sich fast ausschließlich auf plane Fensterscheiben aus Glas für die Gebäudeverglasung. Vereinzelt gibt oder gab es aber auch Anwendungen im Flugzeug- und Automobilbau. Die Anforderungen bezüglich des Schaltverhaltens sind in den erwähnten Bereichen sehr hoch und führen zu einer kostenintensiven Produktion.
Am Anfang der Arbeit ...
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Struktur-Eigenschafts-Beziehung von Mischungen aus thermoplastischem PMMA mit vernetzten PMMA-Kolloiden
(kassel university press, 2016)
Ziel dieser Arbeit war es, ein Compound aus Partikeln aus untereinander vernetzten Polymerketten, sogenannten Kolloiden, und thermoplastischem Matrixmaterial basierend auf dem gleichen Monomer (MMA) aus ingenieurwissenschaftlicher Sicht zu charakterisieren und die Struktur-Eigenschafts-Beziehungen zu klären. Durchgeführt wurden die Untersuchungen an Compounds mit Kolloiden mit verschiedenen Größen, Vernetzungsgraden und Anteilen, die zunächst in Benzol mit dem Matrixmaterial, Plexiglas® 6N, vermischt wurden.
Neben ...
Konferenzveröffentlichung
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Multicomponent Injection Molding Of Thermoplastics And Liquid Silicone Rubber (LSR) – Either Cured By Heat Or UV Light
(Society of Plastics Engineers, 2016)
For processing thermally curing liquid silicone rubber (LSR) as well as UV light curing LSR for multicompo-nent injection molding with thermoplastics in an compa-rable way a processing center was designed and set into operation.
For the production of the multicomponent specimens a modular tool was designed. In there a thermoplastic plate gets molded on the one side, then gets transferred auto-matically by a robot system and gets overmolded by the silicone on the other side. The complete silicone side of the tool is ...
Aufsatz
Climatic Ageing of Components of Polymer Based Electrochromic Devices
(2013-09-09)
Combining a shading function and a polycarbonate window displays an attractive alternative to the currently employed glass roof in vehicles. However, the ageing of such a device must be investigated before any application. Therefore, our investigations focus on the ageing of the components of a polycarbonate based electrochromic device. The optical, electrical, mechanical and electrochemical properties of the ion storage layer as well as the substrate will be assessed after storage in a climate with a high humidity ...
Aufsatz
Characterization of Anisotropic Properties of Hot Compacted Self-Reinforced Composites (SRCs) via Thermal Diffusivity Measurement
(2019-11-01)
The mechanical properties of self-reinforced composites (SRCs) produced in a hot compaction process significantly depend on the process parameters. Only a little deviation of the process temperature or pressure causes the component to act differently under mechanical load. This is a chance and a challenge at the same time, since this process is difficult to handle but by properly controlling the process parameters, the mechanical properties can be adjusted, even locally for one component. In this research SRC are ...
Aufsatz
Joining of Contact Pins and Conductive Compounds via Injection Molding – Influence of the Flow Situation on the Electrical Contact Resistance
(2020-04-09)
While a lot of research can be found in the field of bulk resistance of carbon filled polymers, comparatively few papers focus on contact resistance between compound and metal contacts. Due to that small number of researches that deal with contact resistances, studies of the influence of injection molding conditions and parameters on the contact resistance are also very rare. In contradiction to that, these influences on bulk resistance have been studied. The objective of this work was to investigate the electrical ...
Aufsatz
A Closer Look at the Bonding Capacity of Thick Metal-Plastic Hybrids
(2019-03-01)
Metal-plastic hybrids have a lot of advantages compared to purely metal or purely plastic parts. A good design for metal-plastic hybrids can help to save weight, for example in automotive applications. Therefore, it is important to understand the joining mechanisms between both materials. Aluminum AlSi9Cu3(Fe) and polyamide 6.6 with 35 % glass fibers were used as joining partners. The materials were joined by enclosing the metal part at least partially with plastic right inside the injection molding tool. Afterwards, ...
Aufsatz
UV Pre-Treatment for Polycarbonate for Bonding LSR in a Multi-Component Injection Molding Process
(2019-03-01)
In this study, the influence of UVC radiation and the influence of ozone on the surface energy of specimens made of polycarbonate were investigated. In an additional step, the peeling resistance of silicone flaps, which were overmolded, onto pre-treated PC plates of multicomponent specimens were analyzed. For this purpose, the samples were exposed to UVC radiation for different lengths of time, ranging from 5 s to 3 600 s. To further evaluate the influence of the ozone created by the UVC in the presence of oxygen, ...
Aufsatz
Investigations on Tightness of Polymer-Metal Hybrids in Environments with Thermal, Media, and Mechanical Loads
(2017-07-31)
With polymer-metal hybrids becoming more commonly used as structural components it was investigated how they perform in complex environments with combined thermal, media, and mechanical loads. Special attention was put on media tightness under said loads. This paper sums up the activities of the polymer technology research group of the University of Kassel on hybrids produced by overmolding metal inserts. Investigations concerning joint strength and influence of (cyclic) temperature loads and chemical corrosion on ...