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Electrically-heated ceramic composite tooling for out-of-autoclave manufacturing of large composite structures in SAMPE JOURNAL, Vol. 47, N° 4 (06-07/2011)

[article]  inSAMPE JOURNAL > Vol. 47, N° 4 (06-07/2011) Titre : Electrically-heated ceramic composite tooling for out-of-autoclave manufacturing of large composite structures Type de document : texte imprimé Année de publication : 2011 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminosilicates Composites à fibres de carbone Composites à fibres de verre Composites thermoplastiques Eoliennes -- Matériaux Fibres continues Hors autoclave (technologie) Industries aérospatiales Matériaux céramiques Moules d'injection Outillage Polybutylène téréphtalate Polyéther éther cétone Thermodurcissables Index. décimale : 668.4 Plastiques, vinyles Résumé : This paper describes the development of electrically-heated ceramic composite tooling, aimed primarily at the manufacture of large composites structures, for aerospace or for wind energy. The tooling is designed to operate at temperatures up to 300°C, but has the potential to be used at temperatures up to 500°C and above. The ceramic material is an aluminosilicate material, reinforced by continuous fibres and thermoplastic polymer, and laid up with embedded electrical heaters. The ceramic and reinforcing layers are laid up by hand at room temperature, on a standard pattern and cured initially to 60°C, followed by a free-standing post-cure, in stages to approximately 400°C. Special-purpose gel-coats and surface sealing layers are employed to ensure a smooth, vacuum-tight surface. The tooling is lightweight, strong and durable, and has a low coefficient of thermal expansion. Electrical heating power per square metre of tool surface is typically between 5.0 and 15.0 KW/sq.m. Examples are given of the use of the tooling to manufacture 12.6 metre long glass-fibre/epoxy and glass-fibre/PBT wind turbine blades (250KW machine). Aerospace carbon-fibre epoxy prepregs are also processed on the tooling successfully. In all cases, the materials need to be processed between 180°C and slightly above 200°C. The integrally-heated ceramic composite tooling provides a more cost-effective tooling system for processing thermoplastic or thermoset composites at these temperatures than standard metal tooling. Note de contenu : - Reinforced ceramic composite tooling Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12728 [article]

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Rapid/affordable composite tooling strategies utilizing fused deposition modeling / Bill Macy in SAMPE JOURNAL, Vol. 47, N° 4 (06-07/2011)  

[article]  inSAMPE JOURNAL > Vol. 47, N° 4 (06-07/2011) . - p. 37-44 Titre : Rapid/affordable composite tooling strategies utilizing fused deposition modeling Type de document : texte imprimé Auteurs : Bill Macy, Auteur Année de publication : 2011 Article en page(s) : p. 37-44 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dépôt de fil fondu Outillage Prototypage rapide Index. décimale : 668.4 Plastiques, vinyles Résumé : The need to reduce costs and cycle times while maintaining or improving quality and repeatability is a well appreciated challenge across manufacturing at-large. This challenge is even more evident in composite part fabrication. This paper will discuss practical examples that demonstrate solutions across the composite part manufacturing value stream. Fused Deposition Modeling (FDM) has been effectively used to provide solutions for patterns, molds, pre-forms, intensifiers, caul plates, layup tools, high strength soluble mandrels, trim & drill tools, and even secondary processes like bonding fixtures. In addition to tooling, FDM is also being successfully used for consumable cores that are being laminated or enveloped as an integral part of the final composite part. The ability to combine solid modeling with a digitally mastered, lights-out, environmentally friendly manufacturing process, which can produce everything from tooling to parts, enables new options for design, manufacturing and production. With these capabilities, companies can take advantage of the flexibility to rapidly respond to a wide range of needs. Today’s composite manufacturing market is dynamic and demands new solutions. This paper presents specific case studies in which FDM has been utilized to provide beneficial solutions for composite tooling and manufacturing. En ligne : http://www.stratasys.com/~/media/Main/Secure/White%20Papers/2011_SAMPE_Journal.a [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12729 [article]

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LTM205 OOA materials for novel prepreg formats for cauls and tooling manufactured from very low CTE CV1100 ceramic tooling block / Levi S. Woods in SAMPE JOURNAL, Vol. 47, N° 4 (06-07/2011)

[article]  inSAMPE JOURNAL > Vol. 47, N° 4 (06-07/2011) . - p. 54-61 Titre : LTM205 OOA materials for novel prepreg formats for cauls and tooling manufactured from very low CTE CV1100 ceramic tooling block Type de document : texte imprimé Auteurs : Levi S. Woods, Auteur ; Jon P. Grigson, Auteur Année de publication : 2011 Article en page(s) : p. 54-61 Langues : Américain (ame) Catégories : Dilatation (thermodynamique) Epoxydes Hors autoclave (technologie) Industries aérospatiales Matériaux -- Imprégnation Outillage Stratifiés Tissés Index. décimale : 668.4 Plastiques, vinyles Résumé : This article looks at the development by ATK and ACG of the LTM205 prepreg system for out-of-autoclave (OOA) caul tooling applications and its use with the low CTE CB1100 ceramic block and comparison with other master materials oftenemployed. A brief overview will be presented onthese materials along with formats employed to enable high-quality cauls to be manufactured for major aerospace tooling programs. In order to best understand the potential for these materials some brief manufacturing examples will be looked at and the performance to date examinated. Note de contenu : - Technical challenges to create a concession free part - LMT205 (caul) physical characteristics, technical attributes and performance targets - CB1100 (master) physical characteristics, technical attributes and performance targets Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12730 [article]

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