Fibre coating method and apparatus

C - Chemistry – Metallurgy – 03 – C

Patent

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Details

C03C 25/10 (2006.01) C03C 25/12 (2006.01) C03C 25/14 (2006.01)

Patent

CA 2485412

A fibre unit coating apparatus includes a chamber (190) into which an uncured resin coated fibre unit (12) is passed. Microspheres mixed with air are fed into the chamber (190) via ducts (196) and apertures (194a). As a result rapid and even application of the microspheres can be achieved, and the system allows controllable application of the microspheres by varying the rate of flow of the air/microsphere mixture. Positive pressure chambers (72, 74) are provided to prevent the microspheres from blocking the inlet and outlet points where the fibre unit (12) enters and leaves the chamber (190).

L'invention concerne un appareil de revêtement d'une unité de fibre comprenant une chambre (110) dans laquelle on fait passer une unité de fibre (12) revêtue d'une résine non durcie. Les microsphères mélangées à de l'air sont acheminées dans la chambre (190) par l'intermédiaire de conduites (196) et d'ouvertures (194a). Ainsi, il est possible d'appliquer rapidement et régulièrement les microsphères et le système permet une application que l'on peut commander des microsphères au moyen de la variation du débit d'écoulement du mélange air/microsphères. Des chambres (72, 74) de pression positives permettent d'éviter que les microsphères n'obstruent les points d'entrée et de sortie, à travers lesquels l'unité de fibre (12) entre et sort de la chambre (190).

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