Filament winding (original) (raw)
L'enroulement filamentaire est un procédé de mise en œuvre par moulage de matériaux composites sous forme de pièces de révolution creuses (cylindre, cône, etc.). Ce procédé est adapté aux productions massives et est utilisé principalement pour fabriquer des pièces soumises à une forte pression interne (réservoirs, tuyaux, etc.).
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| dbo:abstract | El enrollado de filamentos (también denominado bobinado de filamentos o devanado de filamentos o Filament Winding en inglés) es una técnica de fabricación de molde abierto para la producción de materiales compuestos, generalmente en forma de estructuras cilíndricas. El proceso consiste en enrollar filamentos y/o cintas tensados e impregnados con una resina termoestable, sobre un molde macho o mandril. El impregnado de la fibra puede ser realizado en una etapa previa o en el mismo carro. El mandril gira mientras que un carro se mueve horizontalmente, depositando las fibras de acuerdo al patrón deseado. Los filamentos más comunes son de carbono o vidrio y están embebidos en resina sintética mientras son depositados y enrollados. Una vez que el mandril esté completamente cubierto con el espesor deseado, el mandril se coloca en un horno para solidificar (curar) la resina. Una vez que la resina se ha curado, se retira el mandril, dejando el producto final hueco. El proceso de enrollado de filamentos es muy adecuado para automatizarlo, ya que así es posible controlar con precisión la tensión de los filamentos. Si los filamentos se colocan con una tensión elevada entonces se consigue un producto final que posee una mayor rigidez y resistencia, mientras que si la tensión que se aplica a los filamentos es baja entonces se obtienen productos más flexibles. También es posible controlar la orientación de los filamentos de manera tal que las capas sucesivas se encuentran cruzadas o con orientaciones diferentes a las de la capa previa. El ángulo con el cual se coloca la fibra determinará las propiedades del producto terminado. Un ángulo elevado provee mayor resistencia contra el aplastamiento, mientras que un patrón con un ángulo bajo (denominado cerrado o helicoidal) otorga una mayor resistencia a la tracción. (es) Filament winding is a fabrication technique mainly used for manufacturing open (cylinders) or closed end structures (pressure vessels or tanks). This process involves winding filaments under tension over a rotating mandrel. The mandrel rotates around the spindle (Axis 1 or X: Spindle) while a delivery eye on a carriage (Axis 2 or Y: Horizontal) traverses horizontally in line with the axis of the rotating mandrel, laying down fibers in the desired pattern or angle to the rotational axis. The most common filaments are glass or carbon and are impregnated with resin by passing through a bath as they are wound onto the mandrel. Once the mandrel is completely covered to the desired thickness, the resin is cured. Depending on the resin system and its cure characteristics, often the mandrel is autoclaved or heated in an oven or rotated under radiant heaters until the part is cured. Once the resin has cured, the mandrel is removed or extracted, leaving the hollow final product. For some products such as gas bottles, the 'mandrel' is a permanent part of the finished product forming a liner to prevent gas leakage or as a barrier to protect the composite from the fluid to be stored. Filament winding is well suited to automation, and there are many applications, such as pipe and small pressure vessel that are wound and cured without any human intervention. The controlled variables for winding are fibre type, resin content, wind angle, tow or bandwidth and thickness of the fiber bundle. The angle at which the fibre is wound has an effect on the properties of the final product. A high angle "hoop" will provide circumferential strength, while lower angle patterns (either polar or helical) will provide greater longitudinal / axial tensile strength. Products currently being produced using this technique range from pipes, golf club shafts, reverse osmosis membrane housings, oars, bicycle forks, bicycle rims, power and transmission poles, pressure vessels, missile casings, aircraft fuselages, lamp posts and yacht spars. (en) L'enroulement filamentaire est un procédé de mise en œuvre par moulage de matériaux composites sous forme de pièces de révolution creuses (cylindre, cône, etc.). Ce procédé est adapté aux productions massives et est utilisé principalement pour fabriquer des pièces soumises à une forte pression interne (réservoirs, tuyaux, etc.). (fr) |
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| rdfs:comment | L'enroulement filamentaire est un procédé de mise en œuvre par moulage de matériaux composites sous forme de pièces de révolution creuses (cylindre, cône, etc.). Ce procédé est adapté aux productions massives et est utilisé principalement pour fabriquer des pièces soumises à une forte pression interne (réservoirs, tuyaux, etc.). (fr) Filament winding is a fabrication technique mainly used for manufacturing open (cylinders) or closed end structures (pressure vessels or tanks). This process involves winding filaments under tension over a rotating mandrel. The mandrel rotates around the spindle (Axis 1 or X: Spindle) while a delivery eye on a carriage (Axis 2 or Y: Horizontal) traverses horizontally in line with the axis of the rotating mandrel, laying down fibers in the desired pattern or angle to the rotational axis. The most common filaments are glass or carbon and are impregnated with resin by passing through a bath as they are wound onto the mandrel. Once the mandrel is completely covered to the desired thickness, the resin is cured. Depending on the resin system and its cure characteristics, often the mandrel is aut (en) El enrollado de filamentos (también denominado bobinado de filamentos o devanado de filamentos o Filament Winding en inglés) es una técnica de fabricación de molde abierto para la producción de materiales compuestos, generalmente en forma de estructuras cilíndricas. (es) |
| rdfs:label | Enrollado de filamentos (es) Filament winding (en) Enroulement filamentaire (fr) |
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