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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 ...
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Blending CA with PBS to increase the bonding strength in two-component injection molding
(Society of Plastics Engineers, 2019)
Since CA shows no adhesive properties in the two-component injection molding process with bio based TPU, blends of CA and PBS were produced to decrease the interfacial tension between the materials. While the interfacial tension was calculated from the results of a drop shape analysis, the adhesion strength was measured in peel tests according to the guideline VDI 2019. The comparison of the results gave information about whether the drop shape analysis is a valid method to analyze the adhesive characteristics of ...
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Natural fiber reinforced technical (bio-) composites modified with halogen-free flame retardants
(Society of Plastics Engineers, 2019)
Under the aspect of sustainability and the use of alternative materials, engineering thermoplastics such as polybutylene terephthalate (PBT) will be reinforced with renewable raw materials such as regenerated cellulose fibers.
The University of Kassel is developing cellulose regenerated fiber reinforced technical thermoplastics in a state-funded project with further companies. Since pure natural fibers cannot withstand the high operating temperature of engineering thermoplastics (Ts>230°C), regenerated cellulose ...
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UV light irradiation of fibers in thermoplastic pultrusion for higher surface energy
(Society of Plastics Engineers, 2018)
Pultrusion is a common way to produce thermoplastic composites reinforced with different kinds of fibers. There are many different opportunities to improve the properties of a thermoplastic material. Different kind of fibers where pultruded in combination with different thermoplastic materials. The fiber content was set to 30wt% comparing the roving strain with the pultruded strain. UV-C light was used in the process to improve the fiber matrix adhesion. The pultruded strain was granulated and injection molded to ...
Konferenzveröffentlichung
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The logarithmic finite element method
(International Center for Numerical Methods in Engineering (CIMNE), 2018)
The Logarithmic finite element (LogFE) method extends the Ritz-Galerkin method to approximations on a non-linear finite-dimensional manifold in the infinitedimensional solution space. Formulating the interpolant on the logarithmic space allows for a novel treatment of the rotational component of the deformation, and induces a strong coupling between rotations and translations. The Logarithmic finite element method provides
a transformation of the initial configuration that is not restricted to an isoparametric formulation.
Konferenzveröffentlichung
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Outsmarting the MNCs by fitting strategic manoeuvres to national framing: evidence from India
(National University of Political Studies and Public Administration (SNSPA), Faculty of ManagementTritonic, 2017)
This paper focuses on how Indian home-grown companies captured MNCs market in India with the help of strategic maneuvering and understanding their own capabilities. Seizing the framework of Porter’s National Diamond this research follows a caselet approach for illustrating these strategies. The study’s originality springs from understanding changes in demand pattern brought by home-grown companies in the Indian market. A key implication of this paper is that the demand conditions and firm strategy (by means of targeting ...
Konferenzveröffentlichung
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Post-crises response strategies: a combined model to manage brand crises
(National University of Political Studies and Public Administration (SNSPA), Faculty of ManagementTritonic, 2017)
Brand crises negatively affect customers’ perception of the brand’s ability to deliver expected functional or symbolic benefits. Post-crisis response strategies should be implemented to restore brand trust and diminish the effect of reputational threat, since these strategies act as critical determinants of the actual impact of the crisis on consumers’ evaluations and consequently on repurchase intentions. A categorization of the nature of the crisis, distinguishing between ‘performance-related’ and ‘values-related’ ...
Konferenzveröffentlichung
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How digitalization changes the internationalization of entrepreneurial firms: theoretical considerations and empirical evidence
(National University of Political Studies and Public Administration (SNSPA), Faculty of ManagementTritonic, 2017)
The internationalization of firms is predominantly analyzed and explained considering observations from a pre-digital business environment. Thus, the applicability to digital ways of doing business needs to be challenged. Recent literature on the internationalization of digital firms attempts to adapt existing international business literature to the digital market. However, these studies consider internet-based companies predominantly as a homogeneous group. It is a popular opinion, that digital internationalization ...
Konferenzveröffentlichung
Controlled magnetic devices in power electronic applications
(IEEE, 2017)
Almost all power electronic converters require magnetic devices and some properties of the converters can be controlled with magnetics. New magnetic materials enable implementation of magnetic control of converters also in high switching frequency applications. The presented paper gives an overview about controllability of magnetic devices in theory and practice, simulation approaches and examples. The focus is on electrically controllable magnetic devices. This means that an additional control winding is wound on ...
Konferenzveröffentlichung
Design of Photovoltaic Microinverter for Off-Grid and Grid-Parallel Applications
(VDE Verlag, 2014)
The design and construction of a 500VA microinverter for photovoltaic applications is presented. The developed microinverter is capable of operating as a standalone AC voltage source for small loads or, alternatively, as a grid-parallel system. Possible applications are therefore small off-grid installations as well as installations where space constraints do not allow enough modules to be combined to use string inverters. The design of the microinverter is based on a two stage concept. Two alternative topologies for ...