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Adhesive/embossing hybrid joining process for ultra-lightweight CFRP/metal structures / Jun Yanagimoto in JEC COMPOSITES MAGAZINE, N° 91 (08-09/2014)
[article]
Titre : Adhesive/embossing hybrid joining process for ultra-lightweight CFRP/metal structures Type de document : texte imprimé Auteurs : Jun Yanagimoto, Auteur ; Zhequn Huang, Auteur Année de publication : 2014 Article en page(s) : p. 52-56 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Assemblages collés
Assemblages multimatériaux
Automobiles -- Matériaux
Colles:Adhésifs
Composites à fibres de carbone
Gaufrage à chaud
Matériaux -- Allègement
Métaux
ThermodurcissablesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Embossing process was applied to improve single-lap adhesive bonding quality for thermosetting CFRP and metallic thin sheets for the first time. The proposed adhesive/embossing hybrid joining process which exhibits remarkable superiorities in terms of tensile shear load, displacement and absorption energy is a competitive joining method for ultra-lightweight thermosetting CFRP/metal hybrid structures. Note de contenu : - Sample preparation and warm embossing process
- Evaluating the quality of adhesive/embossing hybrid joiningPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23020
in JEC COMPOSITES MAGAZINE > N° 91 (08-09/2014) . - p. 52-56[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16509 - Périodique Bibliothèque principale Documentaires Disponible Development of a non-uniform heating system for micro hot embossing / C.-H. Yang in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 2 (05/2013)
[article]
Titre : Development of a non-uniform heating system for micro hot embossing Type de document : texte imprimé Auteurs : C.-H. Yang ; S.-Y. Yang Année de publication : 2013 Article en page(s) : p. 236-243 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Gaufrage à chaud
Microstructures
Nanostructures
Polyméthacrylate de méthyleLe poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec.Index. décimale : 668.9 Polymères Résumé : In recent years, many replication methods of microstructures on large-area substrates have been reported. The plate-to-plate hot embossing process is a low cost, fast, high throughput and the most possibility of mass production method for replication of micro/nano structures with high precision and high quality. However, micro hot embossing is not practical to use in mass production due to the many difficulties. This paper reports a innovative non-uniform heating hot embossing system for fabrication of large-size, high precise and high brightness light guide plate. Steam is used as heating medium, and water of 12 °C is used for cooling. The v-groove patterns in the stamper have been replicated to the light guide plates (LGPs) with an area of 488 mm by 277 mm. The experimental results show that the non-uniform heating system could achieve a transcription rate of over 99 %, compared with 95 % using conventional uniform heating system. Furthermore, less warpage, the less thickness variation, the higher average luminance and the higher brightness field distribution have been found. The results indicate that non-uniform heating system is likely to be a promising technique for the fabrication of optical elements. Note de contenu : - EXPERIMENTAL SETUP : Machine, mold and substrate - Two different types of heating - Cooling systems - Measurements
- RESULTS AND DISCUSSIONS : Replication uniformity using two systems - The warpage of embossed products fabricated by two systems - The thickness variation at various locations of substrates using two systems - The luminance and brightness field distribution of LGPs fabricated using two systems - Numerically simulated and experimentally measured temperature distribution of two types of heating - Cooling channels of hot plates - Discussions of the performance of two systemsDOI : 10.3139/217.2702 En ligne : https://drive.google.com/file/d/1LQ_7iW6c_bfbUCDrYv26eKpMwoJ0S7Fg/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18437
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVIII, N° 2 (05/2013) . - p. 236-243[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15050 - Périodique Bibliothèque principale Documentaires Disponible Edge effect in hot embossing and its influence on global pattern replication of polymer-based microneedles / J. Zhuang in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 2 (05/2019)
[article]
Titre : Edge effect in hot embossing and its influence on global pattern replication of polymer-based microneedles Type de document : texte imprimé Auteurs : J. Zhuang, Auteur ; D.-M. Wu, Auteur ; H. Xu, Auteur ; Y. Huang, Auteur ; Y. Liu, Auteur ; J.-Y. Sun, Auteur Année de publication : 2019 Article en page(s) : p. 231-238 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Effet de bord
Gaufrage à chaud
Micro-aiguilles
Polyméthacrylate de méthyleLe poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec.Index. décimale : 668.4 Plastiques, vinyles Résumé : Hot embossing was used to fabricate a microneedle array on poly(methyl methacrylate) (PMMA) substrates. Both experimental and numerical researches were carried out to investigate the whole formation process. The results showed that the edge effect would significantly influence the replication rate of final products. An optimization design of convex flow barrier was proposed to improve the replication efficiency and structure uniformity. Furthermore, optimum parameters of the flow barrier were found to be 2 mm in length and 0.2 mm in height. Reasonable high molding temperature and force were conducive to reduce the filling time and increase the average height of microneedles. Note de contenu : - NUMERICAL SIMULATION : Physical and numerical modeling - Material properties
- EXPERIMENTAL : Material and equipment - Experimental design
- RESULTS AND DISCUSSION : Edge effect and optimization of structure uniformity - Influence of molding temperature and embossing force on mold filling in hot embossing process - Comparison of the average height of microneedles under different parameters based on the numerical and experimental resultsDOI : 10.3139/217.3726 En ligne : https://drive.google.com/file/d/1wyGC0z4P0QBNlnd5ayxq5ff6xuAhl9uZ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32397
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIV, N° 2 (05/2019) . - p. 231-238[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20883 - Périodique Bibliothèque principale Documentaires Disponible Fabrication of double-sided micro-lens array using UV injection molding / X.-L. Chen in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 1 (03/2019)
[article]
Titre : Fabrication of double-sided micro-lens array using UV injection molding Type de document : texte imprimé Auteurs : X.-L. Chen, Auteur ; K.-C. Ke, Auteur ; N.-W. Chang, Auteur ; Y.-H. Chen, Auteur ; S.-Y. Yang, Auteur Année de publication : 2019 Article en page(s) : p. 20-29 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Electroformage
Gaufrage à chaud
Lentilles (optique)
Mesure
Moules d'injection
Polycarbonates
Polyméthacrylate de méthyleLe poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec.
Rayonnement ultravioletIndex. décimale : 668.4 Plastiques, vinyles Résumé : This paper reports the fabrication of double-sided micro-lens arrays using a UV injection molding process. The apparatus for UV injection molding is designed and implemented. Because the double-sided micro-lens array is fabricated using a UV-curable resin, the molds must be transparent. An alignment system is also required to align the cavities. In preparing the transparent molds, the cavities for the concave micro-lens and the alignment marks are first machined on the aluminum block. Using electroforming and hot embossing, transparent polycarbonate (PC) molds that have cavities for the MLAs and the alignment marks are fabricated. The PC molds are mounted on the UV injection molding apparatus using a pneumatic clamp. A real-time optical alignment system that comprises a CCD and an X-Y table is used to align the marks in the upper and lower molds. After alignment, the UV-curable resin is injected into the molds using a pneumatic dispenser. When the resin is cured with UV light, a double-sided micro-lens array is fabricated. The cycle time is 45 s. The respective degrees of replication for a convex and a concave micro-lens array are 99.74 % and 99.00 %. The respective standard deviation values for the diameter and the height are 1.3 μm, and 1.5 μm. The optical properties of the double-sided micro-lens array are measured. The average effective focal length is 1.686 mm, with a standard deviation of 0.007 mm, which demonstrates good formability and uniformity. Using the fabricated micro-lens array, the 1.2 mm diameter of the original light source is reduced to a 50 μm spot diameter. The images of an “A” pattern are complete and clear. This study demonstrates that a UV injection molding process that uses transparent PC molds can be used to fabricate a micro-lens array and other double-sided microstructures. Note de contenu : - EXPERIMENTS : Fabrication of the aluminum mold - Fabrication of the transparent polycarbonate (PC) molds
- EXPERIMENTAL SETUP : Fabrication process for UV injection molding - Properties of the UV-curable resin - Measurements
- RESULTS AND DISCUSSION : The effect of temperature and pressure on the transparent PC molds - The UV-curable resin product - The effect of pressure on the formability and filling time - Fabrication of the MLAs - The optical performance of the fabricated MLADOI : 10.3139/217.3633 En ligne : https://drive.google.com/file/d/1UPtq6Q1QCfRzbdX97rTADoKFh8xRkO2r/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31908
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIV, N° 1 (03/2019) . - p. 20-29[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20669 - Périodique Bibliothèque principale Documentaires Disponible Injection embossing extended / Martin Philipp-Pichler in KUNSTSTOFFE INTERNATIONAL, Vol. 104, N° 7 (07/2014)
[article]
Titre : Injection embossing extended : The "Hi-Q Shaping" process from Wittmann Battenfeld represents an economical method for producing parts of optical quality Type de document : texte imprimé Auteurs : Martin Philipp-Pichler, Auteur Année de publication : 2014 Article en page(s) : p. 28-30 Langues : Anglais (eng) Catégories : Gaufrage à chaud
Matières plastiques -- Moulage par injectionIndex. décimale : 668.4 Plastiques, vinyles Résumé : For thin-walled or micro-injection molding applications, classic injection embossing often suffers from a lack of precision. A new variant of the method corrects these weaknesses by selectively adding further process parameters and monitoring functions for better control over the injection process. Note de contenu : - Compression stroke too inaccurate for micro production
- Embossing pressure can be regulated process-specifically via the closing stroke
- Experiments with a flashlight lensEn ligne : https://drive.google.com/file/d/1C0YS2CjNRyHdpcrLoasabNuWHw01kIcP/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22297
in KUNSTSTOFFE INTERNATIONAL > Vol. 104, N° 7 (07/2014) . - p. 28-30[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16455 - Périodique Bibliothèque principale Documentaires Disponible Microsystems from polymer films / Werner Karl Schomburg in KUNSTSTOFFE INTERNATIONAL, Vol. 101, N° 6 (06/2011)
PermalinkNovel embossing system for replicating micro-structures on curved surfaces / S. C. Nian in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 3 (07/2014)
PermalinkPMMA micro-pillar forming in micro channel by hot embossing / X. Chen in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 3 (07/2016)
PermalinkRoll-to-roll hot embossing of high aspect ratio micro pillars for superhydrophobic applications / N. Kodihalli Shivaprakash in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 5 (11/2019)
PermalinkTassin : gainerie, dorure d'art et cuir de Cordoue / Garance André in LEATHER FASHION DESIGN (LFD), N° 2 (06/2019)
PermalinkThe development of a multi-axis magnetic roller for micro-structure transfer embossing processing technology / Y.-J. Weng in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 5 (11/2015)
PermalinkThermally conductive polymers meet LED / Dietmar Drummer in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 1-2 (01-02/2017)
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