Carbon foam tooling: self-heating concept, evaluation and demonstration / Douglas J. Merriman in SAMPE JOURNAL, Vol. 42, N° 6 (11-12/2006)

[article]  inSAMPE JOURNAL > Vol. 42, N° 6 (11-12/2006) . - p. 42-49 Titre : Carbon foam tooling: self-heating concept, evaluation and demonstration Type de document : texte imprimé Auteurs : Douglas J. Merriman, Auteur ; Rick Lucas, Auteur Année de publication : 2006 Article en page(s) : p. 42-49 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : A new carbon foam manufacturing process has been developed resulting in a low-cost, high-strength material that has been proving attractive for creation of tooling for composite parts. With the increasing number and scale of composite parts being manufactured, the reduction of cycle times and increased processing flexibility is crucial to both increasing production rates and lowering component costs. To meet these demands a composite tool can be constructed utilizing the new carbon foam material, CFOAM®, which serves as both the tool structure and heating element. The ability to heat a tool outside of an oven or autoclave provides additional flexibility as well as a reduction in capital equipment requirements and costs. Furthermore, using a self-heating tool in conjunction with autoclave processing can reduce cycle times and/or improve temperature uniformity as the tool becomes an active source of heating rather than a passive parasitic thermal mass. A CFOAM tool was constructed in which the material served as both structure and heating element. Construction techniques are discussed, and thermal imaging taken of the resulting tool during heating trials is examined. Note de contenu : - INTRODUCTION : Self-heating tooling - CFOAM background- Characteristics of the CFOAM tooling material - SELF-HEATING TOOLING CONSTRUCTION : Tool fabrication - EXPERIMENTAL - HEATING OPTIMIZATION : Controlled cross sectional uniformity - Oriented voltage potential perpendicular to disruptive features - Zoned control of heating Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23456 [article]

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Case studies : Low cost, high-strength, large carbon foam tooling / Rick Lucas in SAMPE JOURNAL, Vol. 45, N° 1 (01-02/2009)

[article]  inSAMPE JOURNAL > Vol. 45, N° 1 (01-02/2009) . - p. 20-28 Titre : Case studies : Low cost, high-strength, large carbon foam tooling Type de document : texte imprimé Auteurs : Rick Lucas, Auteur ; Harry Danford, Auteur Année de publication : 2009 Article en page(s) : p. 20-28 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion Carbone Composites Dilatation (thermodynamique) Mousses (matériaux) -- Applications industrielles Mousses plastiques Usinage Index. décimale : 668.9 Polymères Résumé : A new carbon foam system has been developed that results in a low-cost, high-strength material that has been proving attractive for creation of tooling for composite parts. Composites are stronger, lighter, and less subject to corrosion and fatigue than materials that currently used for fabrication of advanced structures. Tools to manufacture these composite parts must be rigid, durable and able to offer a coefficient of thermal expansion (CTE) closely matching that of the composites. Current technology makes it difficult to match the CTE of a composite part in the curing cycle with anything other than a carbon composite or a nickel iron alloy such as invar. Fabrication of metallic tooling requires many expensive stages of long duration with a large infrastructure investment. Carbon fiber reinforced polymer resin composite tooling has a shorter lead-time but limited production use because of its low cost, light weight, machinability, vacuum integrity, and compatibility with a wide range of curing processes. Large-scale tooling case studies will be presented detailing carbon foam's potential for tooling applications. Note de contenu : - Carbon foam - Carbon foam tooling - Rapid prototype/Short production run tooling - Tool life - Fabrication techniques - Final preparation and processing - Large scale tooling Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3376 [article]

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