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Joining dissimilar materials without adhesives / Inma Roig in JEC COMPOSITES MAGAZINE, N° 105 (06/2016)
[article]
Titre : Joining dissimilar materials without adhesives : innovation to reduce weight and costs Type de document : texte imprimé Auteurs : Inma Roig, Auteur Année de publication : 2016 Article en page(s) : p. 55-56 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Assemblages (technologie)
Assemblages multimatériaux
Composites
Métaux
PolymèresIndex. décimale : 668.4 Plastiques, vinyles Résumé : The use of polymeric materials in structural applications and/or with advanced properties has increased during the past years since they present so many benefits such as Iow weight, high specific resistance and elastic modulus, design flexibility and reduced manufacturing costs. Note de contenu : - Design flexibility
- Structural applications
- Emerging joining systems
- Joining techniquesPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26341
in JEC COMPOSITES MAGAZINE > N° 105 (06/2016) . - p. 55-56[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18098 - Périodique Bibliothèque principale Documentaires Disponible Joining of contact pins and conductive compounds via injection molding - Influence of the flow situation on the electrical contact resistance / Hans-Peter Heim in INTERNATIONAL POLYMER PROCESSING, Vol. XXXV, N° 2 (05/2020)
[article]
Titre : Joining of contact pins and conductive compounds via injection molding - Influence of the flow situation on the electrical contact resistance Type de document : texte imprimé Auteurs : Hans-Peter Heim, Auteur ; F. Mieth, Auteur ; André Schlink, Auteur ; K. Wiegel, Auteur ; L. Brabetz, Auteur Année de publication : 2020 Article en page(s) : p. 184-192 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Assemblages (technologie)
Assemblages multimatériaux
Broches métalliques
Composites -- Moulage par injection
Composites -- Propriétés électriques
Conduction électrique
Cuivre
Graphite
Insert (technologie)En plasturgie ou fonderie, un insert désigne une pièce d'un matériau infusible incluse dans la pièce fabriquée. Cet élément sert en général à la fixation ultérieure d'éléments mécaniques ou sert de renfort (exemple : chemise d'usure).
Mesures électriques
Polypropylène
Résistance de contact électriqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : While a lot of research can be found in the field of bulk resistance of carbon filled polymers, comparatively few papers focus on contact resistance between compound and metal contacts. Due to that small number of researches that deal with contact resistances, studies of the influence of injection molding conditions and parameters on the contact resistance are also very rare. In contradiction to that, these influences on bulk resistance have been studied. The objective of this work was to investigate the electrical contact resistance of overmolded tinplated copper contacts after modifying flow situations and molding conditions by procedural and constructional methods in contact areas. Metal pins were overmolded with a polypropylene compound containing 45 vol.% graphite, utilising an insert injection molding process. To affect the flow situation at the contacts, several processing parameters, such as mold temperature and injection speed, were modified. In addition, the contact alignment related to melt flow direction was varied. Electrical properties were studied and related to macroscopic and microscopic connection properties and flow situations in contact regions. It was found that the contact resistance is a significant factor while examining electrical resistances of overmolded samples. Furthermore, it was shown that the various flow situations had an essential impact on contact resistances. Weld lines at the position of the contact caused a decreased contact resistance. The correlation of the weld line effect, the filler orientation and contact resistance were successfully investigated by μ-CT. Regarding processing parameters, it was observed that a high mold temperature of 120 °C increased not only bulk conductivity, but also had a positive impact on contact conductivity. Macroscopic and microscopic connection mechanisms of contact surfaces were interpreted and connected to the experimental observations. Note de contenu : - Current status or research
- Materials
- Sample preparation
- Electrical measurements - Results
- Discussion : Macroscopic contact - Microscopic reproduction - Filler position within the interface - Connection of the filler particles close to the interfacesDOI : https://doi.org/10.3139/217.3879 En ligne : https://drive.google.com/file/d/19UY3Adlb4rpmXgeE9uXv5yEEUWG8Xsgf/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34012
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXV, N° 2 (05/2020) . - p. 184-192[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21674 - Périodique Bibliothèque principale Documentaires Disponible Laser technology for lightweight industrial application / Kira van der Straeter in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 5 (05/2016)
[article]
Titre : Laser technology for lightweight industrial application : Efficient joining and cutting processes for all kinds of lightweight materials in the micro and macro range Type de document : texte imprimé Auteurs : Kira van der Straeter, Auteur ; Simon Britten, Auteur ; Frank Schneider, Auteur ; Stefan Janssen, Auteur ; Christoph Engelmann, Auteur Année de publication : 2016 Article en page(s) : p. 13-17 Langues : Anglais (eng) Catégories : Assemblages multimatériaux
Composites à fibres de carbone
Coupe
Insert (technologie)En plasturgie ou fonderie, un insert désigne une pièce d'un matériau infusible incluse dans la pièce fabriquée. Cet élément sert en général à la fixation ultérieure d'éléments mécaniques ou sert de renfort (exemple : chemise d'usure).
lasers
Lasers -- Matériaux
Matériaux -- Allègement
Matières plastiques dans les automobiles
Métaux
Polymères
Soudures
Usinage par laserIndex. décimale : 668.4 Plastiques, vinyles Résumé : The implementation of innovative lightweight construction concepts in new, more efficient products requires fast and reliable joining and cutting processes which can process a plethora of different lightweight materials. Laser radiation stands out as a tool for processing materials mainly because it does not involve any contact and energy input is wear-free. Note de contenu : - Two-step, laser-based polymer-metal hybrid connection
- Electrical contacts for hybrid components
- Wear-free cutting and drilling of FRP
- FIGURES : 1. Two-step process chain of the laser-based method for joining polymer-metal hybrids - 2. Development of structure during laser micro-structuring with increasing number of passes - 3. Tensile shear forces as a function of structural density and structural orientation - 4. The joining tasks expected of the polymer-metal connection as illustrated by the PMJoin demonstrator part - 5. Schematic workflow of the Limbo method - 6. Limbo-facilitated contact between 0.2 mm-thick copper connectors on a PCB with 105µm metallization and cross-sectionof Limbo connection - 7. Cut edge of an 8-mm-thick cutting sample made from CFRP - 8. CFRP preform with star-shaped ablated cut-out for fonctional customized metal insertsEn ligne : https://drive.google.com/file/d/1qNaEnp_R2W7ez8fPOLBnRkmzdOhHBxKh/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26323
in KUNSTSTOFFE INTERNATIONAL > Vol. 106, N° 5 (05/2016) . - p. 13-17[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18076 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Leading-edge process control : Single-shot injection molding of heterogeneous components Type de document : texte imprimé Année de publication : 2022 Article en page(s) : p. 38-41 Langues : Anglais (eng) Catégories : Assemblages multimatériaux
Automobiles -- Pièces
Automobiles -- Portières
Capteurs (technologie)
Matières plastiques -- Moulage par injection
Matières plastiques dans les automobiles
Procédés de fabricationIndex. décimale : 668.4 Plastiques, vinyles Résumé : Family molds belong to the state-of-the-art in injection molding – at least when wall thicknesses and volumes of individual components vary considerably. Using a trial mold soon ready for series production, Synventive demonstrates that – though demanding – optimal process control can be achieved using the right technology. The filling of each mold cavity is controlled individually and in real time. The Kunststoffe editorial team were among the first guests at the new Tech Center. Note de contenu : - Complete freedom regarding filling direction
- The core : a melt-pressure controlled system that responds in real time
- A crucial difference : what happens is regulated, not controlled
- Improving the component surface using software
- Making processes transparent
- Fig. 1 : View into the mold space of the Engel Duo 2700 at the Tech Center. In the background, a 6-axis robot with 180 kg load-bearing capacity which removes the components
- Fig. 2 : The trial and development mold manufactures an assembly for the door panel
- Fig. 3 : Challenges in designing family molds
- Fig. 4 : Making a clear difference : one of 19 sensors installed in the moldEn ligne : https://drive.google.com/file/d/1VayFdAoZx2euJEgoT9rhgm9oc8x0F4QB/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37307
in KUNSTSTOFFE INTERNATIONAL > Vol. 112, N° 2 (2022) . - p. 38-41[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23299 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Long fibers, smart look : Tailgate of the Volkswagen ID.3 : Fiber-reinforced PP enables the use of plastics Type de document : texte imprimé Auteurs : Bernhard Pfeiffer, Auteur Année de publication : 2022 Article en page(s) : p. 42-45 Langues : Anglais (eng) Catégories : Assemblages collés
Assemblages multimatériaux
Automobiles -- Pièces
Bandes composites
Composites à fibres de verre
Composites à fibres longues
HayonsLe hayon sur une automobile, est l'ensemble constitué de la lunette arrière et de la porte de coffre, le tout s'ouvrant ensemble. Par extension on parle de voiture à hayon, en anglais carrosserie hatchback. Apparu dans les années 1950 chez Kaiser et les années 1960 sur les berlines familiales (Renault 4, Renault 16, Simca 1100…) et très populaire en France, ce type de carrosserie s'oppose aux berlines tricorps (trois volumes) à lunette arrière fixe.
Il est généralement équipé d'un essuie-glace et d'un système de dégivrage. (Wikipedia)
Matériaux -- Allègement
Matières plastiques dans les automobiles
Métaux
Polypropylène
Véhicules électriquesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Until now, only metal has been used for the tailgates of VW cars. In its top of the line electric model, the ID.3, Volkswagen is now using a plastic-metal composite for the first time. One of the materials used for its production is a long glass fiber-reinforced polypropylene from Celanese. The material was required to not only satisfy the mechanical demands, but also enable an attractive appearance. Note de contenu : - Plastic/metal hybrid instead of steel
- Extensive demands
- Bonded instead of bolted
- All additives incorporated in one step
- Uv protection and odor requirements met with adapted formulation
- Tapes could be used as substitutes for metal inserts
- Tapes and injection molding material form a solid unit
- Fig. 1 : The demands on the structural and visible part of the tailgate of the ID.3 electric runabout are numerous. They were met with various material modifications
- Fig. 2 : One part of the tailgate is a visible interior part. The FRP used have a very good surface quality and therefore do not have to be additionally painted. They are supplied as pre-pigmented pellets in the desired vehicle interior color
- Fig. 3 : Production of Celstran LFT : the pultrusion technology allows the fibers to be completely impregnated
- Fig. 4 : Since the demands on the tailgate and rear spoiler support differ, they were produced using different materials
- Fig. 5 : The strands produced by pultrusion can be rolled out into 300 mm wide tapes
- Fig. 6 : Schematic illustration of the development of fully impregnated continuous fiber-reinforced tapes: the tapes can be wound onto spools and then processed by injection moldingEn ligne : https://drive.google.com/file/d/1Zs_n1U8brXswkyn7t_BHyTJ9lAYiNkdW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37967
in KUNSTSTOFFE INTERNATIONAL > Vol. 112, N° 4 (2022) . - p. 42-45[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23406 - Périodique Bibliothèque principale Documentaires Disponible Mixing and matching materials provides automakers with a lighter future / Edward Bernardon in JEC COMPOSITES MAGAZINE, N° 91 (08-09/2014)
PermalinkMulti-material mix gets a carbon fiber twist / Martin Reimers in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 3 (03/2018)
PermalinkMultimaterial assembly - issues, problems and solutions / Richard Tomasi in JEC COMPOSITES MAGAZINE, N° 107 (08-09/2016)
PermalinkPlastic and metal - an inseparable team / Erwin Bürkle in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 12 (12/2017)
PermalinkPermalinkProcess chain for the production of hybrid medical products / Moritz Mascher in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 3 (2022)
PermalinkPunching, molding, assembling in a single cell / Ralf Högel in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 12 (12/2018)
PermalinkPutting hybrid components to the test / René Krämer in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 9 (09/2019)
PermalinkReduced settling behavior in multi material components / Thomas Vietor in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 4 (2020)
PermalinkPermalinkReliable adhesion on snow / Claude Hosotte in ADHESION - ADHESIVES + SEALANTS, Vol. 19, N° 4/2022 (2022)
PermalinkPermalinkStack drilling with diamond tool materials / Matthew Goulbourn-Lay in JEC COMPOSITES MAGAZINE, N° 112 (04-05/2017)
PermalinkStructuring step dependent characteristics in joining using pin-like structures in the vibration welding process / Michael Wolf in INTERNATIONAL POLYMER PROCESSING, Vol. 39, N° 2 (2024)
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