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Development of a new production method for manufacturing of hybrid parts from metal and plastics

 
: Bobzin, K.; Öte, M.; Linke, T.F.; Liao, X.; Hopmann, C.; Ochotta, P.; Steger, M.; Gillner, A.

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TU Chemnitz, Institut für Werkstoffwissenschaft und Werkstofftechnik:
18th Chemnitz Seminar on Materials Engineering - 18. Werkstofftechnisches Kolloquium 2016 : Chemnitz, 10 - 11 March 2016
Bristol: IOP Publishing, 2016 (IOP conference series. Materials science and engineering 118)
S.12
Seminar on Materials Engineering <18, 2016, Chemnitz>
Werkstofftechnisches Kolloquium <18, 2016, Chemnitz>
Englisch
Abstract
Fraunhofer ILT ()

Abstract
Increasing requirements for energy and resource efficiency promote the usage of lightweight materials. Moreover, hybrid parts made of different materials can provide a wider range of properties than parts from a single material. One of today’s challenges in production technology is the development of efficient manufacturing methods. Within the scope of the Cluster of Excellence “Integrative Production Technology for High-Wage Countries”, the so called In-Mould-Metal-Spraying (IMMS) is being developed for manufacturing of metal/plastics hybrid parts. It is based upon the transfer of thermally sprayed coatings from the mold insert to the plastic coating carrier during injection molding. A key factor of the IMMS process is the adjustment of the coating bond strength to the mold insert for a residue-free transfer. The surface topography and therefore the surface pretreatment of the mold insert are important for the IMMS process. In the preliminary study, a surface topography fabricated by glass bead blasting has enabled the transfer of wire arc sprayed Zn-coatings. How-ever, further investigations indicated limitations regarding the mold insert material and local coating residuals on the mold insert surface after coating transfer. For the close investigation of this effect, laser structuring is chosen as surface pretreatment method because of its capability of fabricating freely selectable, defined surface topographies. Surface structures in micron range overlaid by LIPSS (Laser Induced Periodic Surface Structures) in submicron range can be prepared using ultrashort pulse lasers. Different surface structures produced by regularly drilling on the surface and variation of the drilling diameter, depth and distance, which lead to the variation of the coating bond strength, are investigated. The aim of this investigation is to identify a suitable surface topography and to understand the bonding mechanism regard-ing the IMMS process.

: http://publica.fraunhofer.de/dokumente/N-404513.html