Sophisticated geometry - and hermetically tight / Astrid Herrmann in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 5 (05/2019)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 5 (05/2019) . - p. 25-27 Titre : Sophisticated geometry - and hermetically tight : Welding instead of gluing for sophisticated medical engineering function components Type de document : texte imprimé Auteurs : Astrid Herrmann, Auteur ; Carsten Handt, Auteur ; Ahmed Ait-Benarrou, Auteur Année de publication : 2019 Article en page(s) : p. 25-27 Langues : Anglais (eng) Catégories : Essais (technologie) Matériel médical Matières plastiques -- Soudage Polymères en médecine Polymères semi-cristallins Soudage par ultrasons Technologie médicale Index. décimale : 668.4 Plastiques, vinyles Résumé : The cleanroom production of a biochip system made of semi-crystalline plastic presented a great challenge for the manufacturer. The upper part with test chamber must be assembled with the support layer in an absolutely tight manner. After all gluing trials had failed, the methodical approach in the weld process saved the project. Note de contenu : - Fig. 1 : The test strip for diagnosis is difficult to produce : Rida-Chip FoodGuide for determination of food intolerances - Fig. 2 : Biochip system : Tray and chamber part must be tightly welded to one another - Fig. 3 : Tightness test by means of rhodamine dye. Above: a leaking component during the test cycles and a tight component at the end of application development - Fig. 4 : The surface of the weld tool (sono-trode) needs to be finely polished to prevent unwanted melting - Fig. 5 : The cut image at the beginning of the tests reveals that the component is sot yet correctly centered and that further modification of the injection molding tool is required - Fig. 6 : Component centering through centering nubs : view of the inside of the chamber - Fig. 7 : Final assessment in the light microscope: centered homogeneous joining result En ligne : https://drive.google.com/file/d/1KtQW3cqo5W2YAXanUFqcTE6ExL6UMkhw/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32550 [article]

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