Process Parameter Optimization for Hot Embossing Uniformly Textured UHMWPE Surfaces for Orthopedic Bearings
نویسندگان
چکیده
منابع مشابه
Nano-structured anti-reflective surfaces replicated by hot embossing
We developed a fabrication technique of anti-reflective structures for applications in the visible spectral range. The depth and duty cycle of the grating structures optimised for wavelengths around 500 nm were calculated using rigorous diffraction theory. We used electron-beam lithography for the manufacturing of linear and crossed grating patterns with pitches of 200 nm and various duty cycle...
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Ultrasonic hot embossing is a new process for fast and low-cost production of micro systems from polymer. Investment costs are on the order of 20.000 € and cycle times are a few seconds. Microstructures are fabricated on polymer foils and can be combined to three-dimensional systems by ultrasonic welding.
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A Moiré fringe approach is developed to identify simultaneously the global and local distortions in hot-embossed polymeric samples. A square grid pattern with a pitch of 63.5 microm is hot-embossed on the polymer substrate. When a reference grid, a polymeric film with the same pattern, is placed on top of the sample, a Moiré fringe pattern is observed and recorded by a document scanner. The dev...
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Clinically relevant studies of cell function in vitro require a physiologically-representative microenvironment possessing aspects such as a 3D extracellular matrix (ECM) and controlled biochemical and biophysical parameters. A polydimethylsiloxane (PDMS) microfluidic system with a 3D collagen gel has previously served for analysis of factors inducing different responses of cells in a 3D microe...
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Texture as a surface representation is the subject of a wide body of computer vision and computer graphics literature. While texture is always associated with a form of repetition in the image, the repeating quantity may vary. The texture may be a color or albedo variation as in a checkerboard, a paisley print or zebra stripes. Very often in real-world scenes, texture is instead due to a surfac...
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ژورنال
عنوان ژورنال: Procedia CIRP
سال: 2017
ISSN: 2212-8271
DOI: 10.1016/j.procir.2017.04.039