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KUNSTSTOFFE INTERNATIONAL . Vol. 112, N° 2Mention de date : 2022Paru le : 22/03/2022 |
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Titre : Every unit counts : Part 3 of the series : Digitalization in compounding Type de document : texte imprimé Auteurs : Daniel Schwendemann, Auteur ; Jasper Hollender, Auteur ; Frank Ehrig, Auteur ; Curdin Wick, Auteur ; Roman Hänggi, Auteur Année de publication : 2022 Article en page(s) : p. 6-9 Langues : Anglais (eng) Catégories : Compoundage
Matières plastiques -- Moulage par injection
NumérisationIndex. décimale : 668.4 Plastiques, vinyles Résumé : In the second part of the series the digitalization applied in injection molding was presented with examples. The quality of the granulates used, produced in the upstream compounding process, is an important influencing factor via the viscosity. Can consistent granulate quality be achieved through the use of digitalization in compounding? Does comprehensive data recording bring with it further use cases, and what special attention must be paid to a continuous process ? The Eastern Switzerland University of Applied Sciences presents the first results of internal projects. Note de contenu : - The challenge of data acquisition during compounding
- Experimental setup and first use of the data acquisition
- Fig. 1 : The compounding plant at the IWK in Rapperswil, was the basis for the internal research project on digitalization
- Fig. 2 : Main process steps during compounding
- Fig. 3 : Overview of the main influencing variables of the compounding process - simplified and divided into process steps
- Table 1 : Possible use cases for the compounding processEn ligne : https://drive.google.com/file/d/1C1DFRUbcR_EaMzS5tZHUDNuZJ6A0ZFPi/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37298
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Code-barres Cote Support Localisation Section Disponibilité 23299 - Périodique Bibliothèque principale Documentaires Disponible Improved processing of recyclates / Anne-Laureen Lauven in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 2 (2022)
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Titre : Improved processing of recyclates : Atmospheric plasma technology as the key to more resource conservation Type de document : texte imprimé Auteurs : Anne-Laureen Lauven, Auteur Année de publication : 2022 Article en page(s) : p. 10-13 Langues : Anglais (eng) Catégories : Matières plastiques -- Recyclage
Plasma à pression atmosphériqueUn plasma à pression atmosphérique (ou plasma à PA ou plasma froid) est le nom donné à une catégorie spéciale de plasma pour lequel la pression approche celle de l’atmosphère.
Le plasma à pression atmosphérique marque une nette différence avec le plasma basse et haute pression. En effet, contrairement à ces derniers aucune enceinte de traitement n'est nécessaire. Ce type de plasma peut donc être utilisé directement sur ligne de production, évitant ainsi l'utilisation de vide qui est extrêmement onéreuse.
Traîtements de surfaceIndex. décimale : 668.4 Plastiques, vinyles Résumé : The use of recyclates confronts companies with new requirements in the processing, bonding, printing and labeling of materials and components. Atmospheric plasma technology, in which Plasmatreat GmbH has specialized, has established itself as a key technology: it often makes the use of recycled plastics possible in the first place – and also proves to be the means of choice on the way to more environmentally friendly, more resource-efficient production processes. Note de contenu : - Flawless, long-lasting UV digital printing on recycling cups
- Solid connection in 3D printing of metal and recycled plastic
- The automotive industry relies on dashboards with recycled content
- More environmentally friendly processes and raw material saving
- Plasma technology drives sustainable development
- Fig. 1 : The injection-molded recycling cup is treated with openair-plasma to increase the surface energy of the non-polar plastic
- Fig. 2 : A high surface energy is decisive for the wetting of the printing ink in UV digital printing and creates the prerequisite for good adhesion of the solvent-free printing inks
- Fig. 3 : Thanks to the adhesive layer, which is applied to the metal carrier using the PlasmaPlus process, the pen holder made of carbon fiber-reinforced, bio-based polyamide holds on to the surface
- Fig. 4 : The pretreatment with plasma makes non-polar plastics susceptible to adhesion processes and ensures a firm connection of the different, sometimes even incompatible materials, for example when laminating dashboards made of recycled materials with powder-sintered molded skins made of soft plasticEn ligne : https://drive.google.com/file/d/1XxuGSWXStopjwB1Q5nKM4nn2L7BCjokB/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37299
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Code-barres Cote Support Localisation Section Disponibilité 23299 - Périodique Bibliothèque principale Documentaires Disponible Electron booster for electric vehicles / Michal Danek in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 2 (2022)
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Titre : Electron booster for electric vehicles : Irradiation crosslinking replaces high-performance plastics with cheaper polymers Type de document : texte imprimé Auteurs : Michal Danek, Auteur ; Wilhelm Schneider, Auteur Année de publication : 2022 Article en page(s) : p. 14-17 Langues : Anglais (eng) Catégories : Composites à fibres de verre
Matières plastiques dans les automobiles
Polyamide 6
Réticulation sous rayonnement électronique
Véhicules électriquesIndex. décimale : 668.4 Plastiques, vinyles Résumé : The conditions in electric vehicles place high demands on the materials used. Therefore, automakers and suppliers must resort to expensive, high-performance plastics. For many applications, cost-effective alternatives are plastics whose properties have been greatly improved by means of treatment with high-energy electron beams. Note de contenu : - Particular challenges in electric vehcicles
- Cost-effective alternatives with irradiation crosslinking
- The principle behind the procedure
- The added value of radiation crosslinking
- Applications in electric vehicles
- Fig. 1. Crosslinked engineering plastics can be used for many different applications in electric vehicles
- Fig. 2. Standard polymers as well as engineering plastics and high-performance polymers
can be crosslinked. The process permits treatment of the polymers highlighted in green
- Fig. 3 : Trend lines due to irradiation crosslinking for different material properties. Of particular interest for use in electric vehicles are
the resulting higher thermal stability and chemical resistance
- Fig. 4 : Treatment significantly increases the short-term thermal stability of glass fiber-reinforced plastics – the increase is particularly large with PA6
- Fig. 5 : Fracture surfaces from tensile tests with non-irradiated (left) and irradiated PA6-GF30 (right) under the scanning electron microscope : the matrix remnants on the glass fibers of the irradiated sample indicate the better bond between fibers and matrix polymer
- Table 1 : Comparison of mechanical characteristics of non-irradiated and irradiated PA66 (at room
temperature / 120 °C)
- Table 2 : Comparison of mechanical characteristics for non-irradiated and irradiated PA6-GF30 (parallel / transverse to injection direction)En ligne : https://drive.google.com/file/d/1aWUj2lAlNAXfypGvJDMb6plxIdV6zzxP/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37300
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Titre : Partner for PEEK : PEEK and epoxy provide efficient insulation for high voltage E-motor Type de document : texte imprimé Auteurs : Brian Baleno, Auteur ; Deedee Smith, Auteur ; Mohammad Qasim Shaikh, Auteur ; Kayla Brown, Auteur ; Jeffrey Southworth, Auteur Année de publication : 2022 Article en page(s) : p. 18-20 Langues : Anglais (eng) Catégories : Adhésion
Epoxydes
Isolation électrique
Matières plastiques dans les automobiles
Moteurs électriques
Polyéther éther cétone
Véhicules électriquesIndex. décimale : 668.4 Plastiques, vinyles Résumé : The rising voltages in electric vehicles are creating higher requirements on insulation materials. This is why PEEK is increasingly used for this purpose. A problem with this high-performance polymer used to be its adhesion to the secondary insulation material. An epoxy resin now promises to solve the issue. Note de contenu : - Seeking good adhesion to PEEK
- Clearly stronger adhesion
- Good resistanct to ATF
- Fig. 1 : PEEK magnet wire insulations are becoming increasingly popular in the high-voltage range. They are very resistant and can withstand high temperatures and voltages. This ensures higher reliability compared to the use of enameled wires
- Fig. 2 : Multi-layer and mono-layer magnet wire design with PEEK: the copper fill factor can clearly be raised if the enamel wire layer is eliminated
- Fig. 3 : Adhesion test method by Solvay for PEEK film and secondary insulation materials. The test clearly showed the better adhesion between PEEK and the ProPreg epoxy resin in comparison to PEEK and a standard polyester material for electric motors
- Fig. 4 : Peel force test results: The adhesion between PEEK and the epoxy resin is more than twice as strong as with PEEK and a standard polyesterEn ligne : https://drive.google.com/file/d/1g-Wv2q-n8UHsMY3QXN53ehoiasQuSNjC/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37301
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Code-barres Cote Support Localisation Section Disponibilité 23299 - Périodique Bibliothèque principale Documentaires Disponible Electric, environmentally friendly, thermoplastic / Giacomo Parisi in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 2 (2022)
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Titre : Electric, environmentally friendly, thermoplastic : Improving the performance of electric vehicles with the right materials Type de document : texte imprimé Auteurs : Giacomo Parisi, Auteur ; Laurent Lefebvre, Auteur Année de publication : 2022 Article en page(s) : p. 21-25 Langues : Anglais (eng) Catégories : Matières plastiques dans les automobiles
ThermoplastiquesUne matière thermoplastique désigne une matière qui se ramollit (parfois on observe une fusion franche) d'une façon répétée lorsqu'elle est chauffée au-dessus d'une certaine température, mais qui, au-dessous, redevient dure. Une telle matière conservera donc toujours de manière réversible sa thermoplasticité initiale. Cette qualité rend le matériau thermoplastique potentiellement recyclable (après broyage). Cela implique que la matière ramollie ne soit pas thermiquement dégradée et que les contraintes mécaniques de cisaillement introduites par un procédé de mise en forme ne modifient pas la structure moléculaire.
Véhicules électriquesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Electric-vehicle makers looking for fresh impetus are turning to thermoplastics, as these can be used to improve the safety, performance and sustainability of the vehicles. Initial application areas for manufacturers can be found in a multitude of components ranging from battery cases to busbars, cooling lines and seals. Things become very interesting when material suppliers offer support in the form of CAE and injection molding analyses. Note de contenu : - Protecting batteries with hybrid plastic-metal solution
- Temperature and cost advantages
- The complexity of busbars
- Overmolding of metal parts : avoiding cracks and loose coatings
- Centers of excellence develop more sustainable cooling lines
- New multi-layer structure based on pa and tpe lowers gwp
- High-performance ea seals
- Ethylene acrylic for cooling
- Weight savings for axial flux motors
- More than just a materials supplier
- Fig. 1 : To achieve greater protection against battery thermal runaway, manufacturers are increasingly using overmolded busbars. The plastics used must withstand large temperature fluctuations and be resistant to hydrolysis and tracking current
- Fig. 2 : Plastics converters reap huge benefits when materials suppliers have production-scale processing machines and all the necessary testing equipment. DuPont, for example, regularly performs its own injection molding analyses so as to identify sources of defectsEn ligne : https://drive.google.com/file/d/18ED71_3AX8zIbjM7SSDsY0rHvmOzgzXG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37302
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Code-barres Cote Support Localisation Section Disponibilité 23299 - Périodique Bibliothèque principale Documentaires Disponible Accident protection with plastics / Holger Klink in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 2 (2022)
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Titre : Accident protection with plastics : Crash absorbers made from PA for the front end carrier of the Mercedes-Benz S-Class Type de document : texte imprimé Auteurs : Holger Klink, Auteur ; Robin Kaiser, Auteur Année de publication : 2022 Article en page(s) : p. 24-26 Langues : Anglais (eng) Catégories : Absorbeur de collision
Amortisseurs (technologie)
Automobiles -- Pièces
Composites à fibres de verre
Matières plastiques dans les automobiles
PolyamidesUn polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine.
Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères.
Protection anti-chocsIndex. décimale : 668.4 Plastiques, vinyles Résumé : Most of the energy in a crash is absorbed by metal parts. A new additional polyamide (PA) crash absorber has for the first time been integrated into the front end of the Mercedes-Benz S-Class. The advantage is that an additional loadpath could be added without significantly increasing the mass of the car. Close cooperation between the project partners and the use of suitable simulation tools were key to successful realization of this project. Note de contenu : - Crash absorber made from fiber-reinforced polyamide
- Use of plastics previously excluded
- Motivation and challenge
- Crash absorber already in service
- Fig. 1 : Example illustrating the relevant load zone: for optimum protection of the other vehicle involved in the accident, the largest possible area should be available for energy absorption
- Fig. 2 : The crash absorber (component with triangular structures in the center of the picture) is produced from glass fiber-reinforced PA. Besides the integration of several surrounding parts, the component assists in fulfilling safety aspects
- Fig. 3 : Comparison between the simulation calculations and the drop tower tests shows the good predictability of the simulation
- Fig. 4 : For successful cooperation between the development partners, simultaneous use of the simulation software is vitalEn ligne : https://drive.google.com/file/d/1UTFsA8WKjW9gqFfqVKjYUmWjMOa09Upp/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37303
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Code-barres Cote Support Localisation Section Disponibilité 23299 - Périodique Bibliothèque principale Documentaires Disponible A console for the roof lining / Martin Hahn in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 2 (2022)
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Titre : A console for the roof lining : One-step production of HMI components Type de document : texte imprimé Auteurs : Martin Hahn, Auteur Année de publication : 2022 Article en page(s) : p. 28-31 Langues : Anglais (eng) Catégories : Automobiles -- Eclairage
Automobiles -- Habitacles
Commande tactile
Décoration dans le moule
Diodes électroluminescentes
Matières plastiques dans les automobiles
Véhicules électriquesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Electromobility and increasingly autonomous vehicles are changing the car interior. This requires futuristic concepts combining design and functionality, which can be adapted to the occupants’ individual requirements. A good example of this is a roof lining console manufactured by Leonhard Kurz. It is particularly interesting for automotive manufacturers and suppliers, since it can be manufactured in only one production step. Note de contenu : - Technical progress thanks to bundled competence
- Manufacturing, decorating and functionalizing in one step
- Intelligent sensor integration
- Component cleaning as an inline process
- Wafer-thin, transparent, recyclable
- Lighting the car interior individually
- Sustainability throughout the value-creation chain
- Manufacturing cell at K 2022
- Fig. 1. The organic 3D shaping of the surface supports the intuitive operation of the touch buttons
- Fig. 2. Various designs are possible thanks to IMD manufacturing. A soft-touch function can also be integrated in order to appeal to the sense of touch
- Fig. 3. Matrix LED spots from Osram are used at both sides of the module
- Fig. 4. The light structures in the decor illuminate depending on the situation
- Fig. 5. The roof-liner consoles can be manufactured in one step and equipped with sensors and touch functionPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37304
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Titre : Lighter together : Blends of PP and PA reduce weight and improve chemical resistance Type de document : texte imprimé Auteurs : Manfred Bär, Auteur Année de publication : 2022 Article en page(s) : p. 32-34 Langues : Anglais (eng) Catégories : Alliages polymères
Composites à fibres de verre
Matériaux -- Allègement
Matières plastiques dans les automobiles
PolyamidesUn polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine.
Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères.
Polypropylène
Résistance chimiqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : Vehicle weight reduction requirements today pose great challenges not only to automotive manufacturers and suppliers but also to material producers. The materials used must cut weight while at the same time withstanding the mechanical and chemical stresses encountered in service. This can be achieved, for example, with blends of polyamide and polypropylene. These blends also offer other useful advantages. Note de contenu : - Stable compound obtained by grafting and special compounding technology
- Up to 10 % lower density
- Practical experience demonstrates success
- Twice as sustainable
- Fig. 1. Depending on the grade, PA6+PP blends with 30 % glass fiber reinforcement have a 7 to 10 % lower density than pure PA6 with the same glass fiber reinforcement. Although the density of PP-GF30 is even lower, this material does not usually fulfill the necessary technical requirements
- Fig. 2. The effect of conditioning upon tensile strength is less with the PA+PP blends than with PA6
- Fig. 3. Due to the PP content of the blends, their heat deflection temperature is sometimes lower than that of pure PA. However, the difference is minimal and so they are still suitable for heat-stressed components
- Fig. 4. Test bars after contact with a calcium chloride solution. The grey points indicate degradation. The bars made from the PA+PP blends show basically no degradation, unlike those made from PA
- Fig. 5. With these blends, it is possible to produce compactly designed fan shrouds that are even lighter than those made by foam injection molding with pure PA66 for example
- Fig. 6. Relative reduction of the carbon footprint by replacing conventional PA6 compounds with Akromid-Lite compounds : depending on the material, savings of up to 25 % are possible
En ligne : https://drive.google.com/file/d/1BRvrtOlQKsbiV0ZcVkjUt6jgkNZipFbf/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37305
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Titre : Safely belted in : Fully automated in-mold assembly process at TKW molding Type de document : texte imprimé Auteurs : Andreas Ambruster, Auteur Année de publication : 2022 Article en page(s) : p. 36-37 Langues : Anglais (eng) Catégories : Assemblage dans le moule
Automatisation
Automobiles -- Pièces
Ceintures de sécurité
Matières plastiques -- Moulage par injection
Matières plastiques bi-composant
Matières plastiques dans les automobilesIndex. décimale : 668.4 Plastiques, vinyles Résumé : The plastics processor TKW Molding, which specializes in safety-related automotive components, is responding to the increasing requirements of its tier 1 and OEM customers by extensively automating its injection molding production. This also encompasses downstream process steps, such as integrated component testing, traceable part deposition and packaging. The company has been working closely with Arburg in this field since 2020. Note de contenu : - Lots of technology in not much space
- Nine million parts per yearEn ligne : https://drive.google.com/file/d/1BnZjBg_Ejui0u0e8gBU8a9w-F4Yc0VY4/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37306
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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
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Code-barres Cote Support Localisation Section Disponibilité 23299 - Périodique Bibliothèque principale Documentaires Disponible Anisotropic simulation of short fiber-reinforced plastics / Vanessa Kett in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 2 (2022)
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Titre : Anisotropic simulation of short fiber-reinforced plastics : Factoring fiber orientation into structural simulations Type de document : texte imprimé Auteurs : Vanessa Kett, Auteur ; Jörg Helfenstein, Auteur Année de publication : 2022 Article en page(s) : p. 42-44 Langues : Anglais (eng) Catégories : Anisotropie
Composites à fibres courtes
Design industriel
Distribution et orientation des fibres
Simulation par ordinateurIndex. décimale : 668.4 Plastiques, vinyles Résumé : Short fiber-reinforced plastics are used for many technically demanding applications. For efficient development processes and high product quality, their anisotropic material properties must be factored into the design cycle. A simple approach often taken is to reduce the material stiffness. However, a more accurate approach is to consider the effective fiber orientation. This article discusses the pros and cons of both approaches. Note de contenu : - Realistic mapping of local stiffness
- Comparison of isotropic and anisotropic simulations
- Deviations within the expected range
- Use of the anisotropic simulation in product development
- Fig. 1 : Typical workflow for simulating short fiber-reinforced materials in Ansys Workbench. (A) Ansys Material Designer : generating an anisotropic material model, (C) Injection Molding Data : importing fiber orientations, (B) Static structural: definition of the FE model
- Fig. 2 : Main fiber orientations mapped in Ansys Mechanical from the injection molding simulation at a through-hole on the pump head
- Fig. 3 : Comparison of the experimentally determined stress-strain curve and the simulated values for a tensile test carried out according to DIN EN ISO 527 (material : PPA-GF40)
- Fig. 4 : Comparison of different part simulations with values determined experimentally in a part test (normalized values)En ligne : https://drive.google.com/file/d/1d9nFZBQBcRe5FJCuRQCVkLoJEgf9OpL6/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37308
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Code-barres Cote Support Localisation Section Disponibilité 23299 - Périodique Bibliothèque principale Documentaires Disponible Less is more : Reduce is better than recycle / Stuart Sampson in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 2 (2022)
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Titre : Less is more : Reduce is better than recycle : Topology optimization as a development strategy for sustainable plastic components Type de document : texte imprimé Auteurs : Stuart Sampson, Auteur ; Lars Fredriksson, Auteur ; Mirko Bromberger, Auteur Année de publication : 2022 Article en page(s) : p. 45-47 Langues : Anglais (eng) Catégories : Adhésifs structuraux
Automobiles -- Conception et construction
Automobiles -- Matériaux
Durée de vie (Ingénierie)
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).
Matériaux -- Allègement
Matières plastiques dans les automobiles
Numérisation
TopologieIndex. décimale : 668.4 Plastiques, vinyles Résumé : In engineering plastics, sustainability does not just start with recycling. At the component design stage it is crucial to use only as much material as needed for optimum product performance. Topology optimization plays a vital role here because, as the key to lightweight construction, it simplifies the selection of sustainable design alternatives. Note de contenu : - Organizational hurdles and transformation
- Application example sika : structural inserts for lighter, quieter vehicles
- Conclusion : digitalization and improved processes for enhanced sustainability
- Fig. 1 : Altair's processes simplify the strategic application of topology optimization for global architectural concepts, local reinforcements, and the efficient use of structural adhesives. In practice, this means up to 80 % time savings for model setup and analysis
- Fig. 2 : When developing structural inserts, Sika engineers were able to eliminate time-consuming steps using the Altair Design Space workflow, achieving the results in minutes instead of hours
- Fig.3 : Since modeling time was reduced by 70 %, the Sika team could further improve the component through iterations. Design space model (traditional workflow) ; model created using the "Altair Design Space" workflow ; example of a D-pillar NVH reinforcer
- Fig. 4 : Comparison between time and organizational efficiency gain. process with conventional build space creation and new approach to CAE-focused build space creationEn ligne : https://drive.google.com/file/d/1aH2FoHh2fCsBDrATybeZyFIGRgh_MTjt/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37309
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Code-barres Cote Support Localisation Section Disponibilité 23299 - Périodique Bibliothèque principale Documentaires Disponible What is the most suitable material combination / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 2 (2022)
[article]
Titre : What is the most suitable material combination : Manufacture of a rear license plate light in a highly integrated production cell Type de document : texte imprimé Auteurs : Christian Hopmann, Auteur ; Ingrid Sturm, Auteur ; Jonas Gerads, Auteur Année de publication : 2022 Article en page(s) : p. 48-51 Langues : Anglais (eng) Catégories : Assemblages multimatériaux
Automobiles -- Eclairage
Conduction électrique
Diodes électroluminescentes
Matières plastiques -- Moulage par injection
Matières plastiques dans les automobiles
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.
Productique
Résistance à la traction
Thermocinétique
Transmission de vapeur d'humiditéIndex. décimale : 668.4 Plastiques, vinyles Résumé : The aim of this joint project is to develop a production cell in which a rear license plate light can be manufactured with hybrid processes without any additional steps such as bonding. Some of the necessary analyses and pre-testing of the material combinations resulting from the structure of the product - plastic housing and optics plus metal conductive tracks - are presented in this article. Note de contenu : - New production concept shortens process chain
- How conductive are the test specimens ?
- What is the bond strength of the imks specimens ?
- Composite strength of the optical materials
- Media tightness of two-component parts
- Fig. 1 : Specific electrical conductivities of all material combinations from a metallic solder and a standard or thermally conductive plastic
- Fig. 2 : Necessary pull-out forces for all material composites. Both the metallic solders can withstand the highest extraction forces in combination with TC110
- Fig. 3 : Tensile strength of the produced 2-component specimens with declining bond strength in increasing thermal conductivity of the materials
- Fig. 4 : Schematic illustration of the test set-up for the WVTR measurement
- Fig. 5 : Results of the WVTR measurements of the 2-component specimens as a function of the material area percentagesEn ligne : https://drive.google.com/file/d/1pFH67RTYCDOBORpaCYRrZtKQP2x8ulnG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37310
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Code-barres Cote Support Localisation Section Disponibilité 23299 - Périodique Bibliothèque principale Documentaires Disponible Design methodology for parts subject to internal pressure / Thorsten Krumpholz in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 2 (2022)
[article]
Titre : Design methodology for parts subject to internal pressure : Mold system with rotating core improves mechanical properties Type de document : texte imprimé Auteurs : Thorsten Krumpholz, Auteur ; Philipp Land, Auteur Année de publication : 2022 Article en page(s) : p. 52-55 Langues : Anglais (eng) Catégories : Composites à fibres courtes
Composites à fibres de verre -- Moulage par injection
Distribution et orientation des fibres
Matières plastiques -- Rotomoulage
Mesure
Moules à noyau rotatif
Moules d'injection
Polypropylène
Simulation par ordinateurIndex. décimale : 668.4 Plastiques, vinyles Résumé : Internal pressure loads are typical for fiber-reinforced plastic components. To increase the burst strength of components, the fiber orientation can be modified in a targeted way during injection molding by means of a rotating mold core. A newly developed simulation method allows this modified fiber orientation to be taken into account at the design stage. Note de contenu : - Measurement of fiber orientation
- Stages of the simulation methodology
- Practical realization of a pressure-loaded component
- Fig. 1. The superimposition of the injection-induced axial shearing by the tangential shearing due to the rotation selectively influences the fiber orientation in the tangential direction due to the rotation
- Fig. 2. The rotation core can produce an increase in the tangential orientation component almost independent of the wall thickness (left). At correspondingly high speeds, the tangential fibers dominate the microstructure across the entire thickness (right)
- Fig. 3. The layer-by-layer assignment of the fiber orientations, with the aid of Converse and S-Life-Plastics, enables the anisotropic structural simulation of rotated components
- Fig. 4. Application of the simulation methodology allows, for the first time, the increased bursting strength due to rotation of the mold core also to be taken into account in the design of new components
- Fig. 5. This application case shows a significant reduction of the utilization ratio due to manufacturing with a rotating coreEn ligne : https://drive.google.com/file/d/1M6AWx7jg_NhlQV9iEZQgQp3ZD7Dqb60K/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37311
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Code-barres Cote Support Localisation Section Disponibilité 23299 - Périodique Bibliothèque principale Documentaires Disponible Precise but highly efficient / Paul Zwicklhuber in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 2 (2022)
[article]
Titre : Precise but highly efficient : CAD-based tape -stacking Type de document : texte imprimé Auteurs : Paul Zwicklhuber, Auteur ; Norbert Müller, Auteur Année de publication : 2022 Article en page(s) : p. 56-58 Langues : Anglais (eng) Catégories : Bandes composites
Conception assistée par ordinateur
Empilements
Matériaux -- Allègement
PyrolyseLa pyrolyse est la décomposition ou thermolyse d'un composé organique par la chaleur pour obtenir d'autres produits (gaz et matière) qu'il ne contenait pas. L'opération est réalisée en l'absence d'oxygène ou en atmosphère pauvre en oxygène pour éviter l'oxydation et la combustion (L’opération ne produit donc pas de flamme). Il s'agit du premier stade de transformation thermique après la déshydratation.
Elle permet généralement d'obtenir un solide carboné, une huile et un gaz. Elle débute à un niveau de température relativement bas (à partir de 200 °C) et se poursuit jusqu'à 1 000 °C environ. Selon la température, la proportion des trois composés résultants est différente.
Soudures
Soudures -- NettoyageIndex. décimale : 668.4 Plastiques, vinyles Résumé : Tapes must be stacked both with high accuracy and efficiency. In the ongoing development of its tape-stacking cell, Engel places a third focus on simplifying operation. CAD-based tape stacking, which Engel has implemented in a customer’s system for the first time, will play a role here. Further new features are the pyrolysis function for cleaning the welding elements, as well as the modular end-of-arm tooling for handling the semi-finished products. Note de contenu : - Determining the stacking position accurately
- Pyrolysis : automatic cleaning welding elements
- More flexibility for varying tape geometries
Fig. 1 : The CAD-based tape stacking simplifies the fabrication of stacks of UD tapes. The new technology is already used for developing and manufacturing innovative composite products
- Fig. 2 : The control system of the articulated robot automatically determines the optimum stacking position based on CAD data
- Fig. 3 : Dirt deposits increase with the number of welds until the weld quality is impaired. The cyclic pyrolysis ensures weld quality is maintained at a constantly high level
- Fig. 4 : The illumination plate of the modular end-of-arm tooling can be very easily exchanged by releasing a few screwsEn ligne : https://drive.google.com/file/d/1Oj6p8mw-CWL60MzW87JJH_mKqY-JpkfD/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37312
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