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Flexibilizing graphite polar plates / Andreas Cohnen in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 6-7 (06-07/2016)
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Titre : Flexibilizing graphite polar plates : Toughened thermoplastic compounds for manufacturing flexible bipolar plates Type de document : texte imprimé Auteurs : Andreas Cohnen, Auteur ; Christian Hopmann, Auteur ; Petra Pötschke, Auteur ; Beate Krause, Auteur ; Thorsten Hickmann, Auteur Année de publication : 2016 Article en page(s) : p. 63-65 Langues : Anglais (eng) Catégories : Composites thermoplastiques
Composites thermoplastiques -- Propriétés mécaniques
Elastomères
Graphite
Matières plastiques dans les équipements électriques et électroniques
PolypropylèneIndex. décimale : 668.4 Plastiques, vinyles Résumé : Efficient bipolar plates are needed for storing electric power obtained from renewable energy sources. While polypropylene makes a suitable matrix material for such plates, the necessary level of conductivity can only be obtained by loading it with up to 80 wt. % graphite. To prevent the compound from embrittling afterwards and to ensure it remains easy to process, a method of improving the impact strength with elastomers has been developed. Note de contenu : - Preparation of highly loaded compounds
- Mechanical properties of synthetic graphite compounds
- Resistance of synthetic graphite compounds
- Studies on expanded graphiteEn ligne : https://drive.google.com/file/d/1F3PkbDy98JIqJ2h_UEkH2FjOy5z8GuF5/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26786
in KUNSTSTOFFE INTERNATIONAL > Vol. 106, N° 6-7 (06-07/2016) . - p. 63-65[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18242 - Périodique Bibliothèque principale Documentaires Disponible Getting the combination right / Thorsten Hickmann in KUNSTSTOFFE PLAST EUROPE, Vol. 93, N° 11/03 (11/2003)
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Titre : Getting the combination right : Hybrid moulding Type de document : texte imprimé Auteurs : Thorsten Hickmann, Auteur ; Eric Klemp, Auteur Année de publication : 2003 Article en page(s) : p. 23-24 Langues : Anglais (eng) Index. décimale : 668.4 Plastiques, vinyles Résumé : Production of injection moulds needs to be fast, flexible, inexpensive and durable. Problem is, however, that none of the standard mould making techniques actually combines all of these requirements. A way out of this conundrum is to combine the various standard processes with novel ones. Hybrid moulding is one such solution. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7036
in KUNSTSTOFFE PLAST EUROPE > Vol. 93, N° 11/03 (11/2003) . - p. 23-24[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011080 - Périodique Bibliothèque principale Documentaires Disponible Precision parts rapidly and economically / Thorsten Hickmann in KUNSTSTOFFE PLAST EUROPE, Vol. 94, N° 11/2004 (11/2004)
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Titre : Precision parts rapidly and economically Type de document : texte imprimé Auteurs : Thorsten Hickmann, Auteur ; Eric Klemp, Auteur Année de publication : 2004 Article en page(s) : p. 62-65 Langues : Anglais (eng) Index. décimale : 668.4 Plastiques, vinyles Résumé : Metal injection moulding - Satisfying demanding requirements is nothing new for injection moulding. When it comes to application-specific material properties, high accuracy and minimal rework of metal components, metal injection moulding (MIM) represents an ideal approach to meet these objectives. An absolute prerequisite, however, is knowledge of the specific limits of the process. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7634
in KUNSTSTOFFE PLAST EUROPE > Vol. 94, N° 11/2004 (11/2004) . - p. 62-65[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000138 - Périodique Bibliothèque principale Documentaires Disponible The potential of redesign and part consolidation / Thorsten Hickmann in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 5 (2020)
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Titre : The potential of redesign and part consolidation : Additive manufacturing and hybrid molds in combination with conventional machining Type de document : texte imprimé Auteurs : Thorsten Hickmann, Auteur ; Eric Klemp, Auteur Année de publication : 2020 Article en page(s) : p. 26-29 Langues : Anglais (eng) Catégories : Composites à fibres de verre
Impression tridimensionnelle
Matières plastiques -- Moulage par injection
Polyamide 66
Procédés de fabrication hybridesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Hybrid production chains have been increasingly in the spotlight in recent years. This also applies to the ‧combination of conventional manufacturing and additive processes in tool construction. With the example of an injection molding tool, it is shown how mold inserts produced by additive manufacturing can greatly shorten cycle times, and thereby significantly reduce unit costs. The important thing is to find a suitable combination of processes from the variety available. Note de contenu : - The process chain is becoming more challenging
- The combination : hybrid molding
- Designing for AM
- Spacer as a practical example
- Optimizing the tool by a bionic design
- Comparison of process chains : complexity has no extra costs
- Figure : Tool insert for a spacer of a glass fiber reinforced PA66. The example shows that hybrid manufacturing is suitable and provides added value, even with co:mparatively simple parts
- Fig. 1 : Apart from conventional tool building, hybrid molding also includes additively manufactured mold inserts and HSC milling
- Fig. 2 : The part is used during painting to keep the engine hood at a defined distance
- Fig. 3 : Graphic of the conventional, hybrid and additive process chains : the mold inserts for the tool for injection molding the spacer were manufactured by selective laser melting
- Fig. 4 : Production costs for 100 000 plastic parts in each case with a one- and two-cavity tool. The hybrid process chain has the advantageEn ligne : https://drive.google.com/file/d/1x3X_1HxFT5pupJJyOKcn4hQOsPtN_XpM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34463
in KUNSTSTOFFE INTERNATIONAL > Vol. 110, N° 5 (2020) . - p. 26-29[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21834 - Périodique Bibliothèque principale Documentaires Disponible Ultrathin bipolar plates for fuel cells / Thorsten Hickmann in KUNSTSTOFFE INTERNATIONAL, Vol. 111, N° 5 (2021)
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Titre : Ultrathin bipolar plates for fuel cells : Modified conductive compounds make it possible to manufacture bipolar plates from a bipolar film coil Type de document : texte imprimé Auteurs : Thorsten Hickmann, Auteur ; Thorsten Derieth, Auteur Année de publication : 2021 Article en page(s) : p. 38-40 Langues : Anglais (eng) Catégories : Composites à fibres de graphite
Conducteurs organiques
Emboutissage
Films plastiques
Films plastiques -- Propriétés mécaniques
Graphite
Piles à combustible
Pliage (mécanique)
Polyéthylène
Polyfluorure de vinylidène
Polypropylène
Polysulfures de phénylène
Résistance électriqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : Bipolar plates are one of the key components of fuel cells and redox flow batteries. They consist of plastics compounds highly filled with electrically conductive materials. To save space, cut costs, and reduce weight, there is increasing demand for the production of thinner plates without compromising robustness and service life. This can be achieved using modified polymers. With a new technology, bipolar plate films based on these modified polymers can be processed as coils. Note de contenu : - Challenge : Thin but durable
- Modified films achieve the required values
- Coil processing is possible
- Figure : The modified polymers enable films to be processed as coils
- Fig. 1 : By modifying the highly filled plastics, considerably thinner bipolar plate films can be produced than was previously the case
- Fig. 2 : Film thickness of the processed compounds and comparison with reference materials (filling degrees in brackets) : the thickness of the plates ranges between about 0.5 and 1 mm
- Fig. 3 : The tensile strength of the different films is lower than that of the reference materials. However, the reference materials are also considerably thicker (3 mm)
- Fig. 4 : The electrical resistance of the compounds (filling degrees in brackets) is higher than that of the reference materials. However, this is compensated for by the lower thickness of the films
- Fig. 5 : Stamped graphite compound film : the bipolar plate is produced by the stamping/ bending processEn ligne : https://drive.google.com/file/d/1n7ao1giAoz3sk2teppAwRxmgGVpFTlgv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36168
in KUNSTSTOFFE INTERNATIONAL > Vol. 111, N° 5 (2021) . - p. 38-40[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22860 - Périodique Bibliothèque principale Documentaires Disponible