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Proceedings Paper

Laser structuring of metallic mold inserts by using µs, ns, and ps-laser ablation
Author(s): Steffen G. Scholz; Alexander Kolew; Christian Griffiths
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Paper Abstract

Bio-inspired surfaces targeting functional characteristics such as anti-reflectivity, self-cleaning effects or a drag reduction are of significant interest to industry. In this feasibility study, process chains for the mass production of so-called shark skin structured surfaces are investigated. Due to their drag reduction properties, such bio-inspired surfaces are of relevance to a number of applications in which particular aqua- and aerodynamic characteristics are required. The design of the shark skin structure relies on a bio-mimetic analytical model to generate the 3D surface model necessary to achieve the targeted surface functionality. The process chains presented combine laser ablation as a method for micro structuring masters for high throughput replication employing injection molding. In particular, three different process chains that rely on micro second (μs), nano second (ns) and pico second (ps) laser ablation systems to pattern mold inserts were investigated. Then, these inserts were integrated into a tool for micro injection molding and replication trials were carried out. The results show that all three laser sources can be utilized to create this kind of micro cavities. This research indicates that these micro structures can be replicated successfully, but further work is required to optimize the replication and laser structuring process.

Paper Details

Date Published: 25 February 2012
PDF: 11 pages
Proc. SPIE 8244, Laser-based Micro- and Nanopackaging and Assembly VI, 82440J (25 February 2012); doi: 10.1117/12.910006
Show Author Affiliations
Steffen G. Scholz, Cardiff Univ. (United Kingdom)
Alexander Kolew, Cardiff Univ. (United Kingdom)
Christian Griffiths, Cardiff Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 8244:
Laser-based Micro- and Nanopackaging and Assembly VI
Friedrich G. Bachmann; Wilhelm Pfleging; Kunihiko Washio; Jun Amako; Willem Hoving; Yongfeng Lu, Editor(s)

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