Stock material or miscellaneous articles – All metal or with adjacent metals – Foil or filament smaller than 6 mils
Patent
1998-04-22
2000-04-04
Morris, Terrel
Stock material or miscellaneous articles
All metal or with adjacent metals
Foil or filament smaller than 6 mils
139425R, 442 3, 442 6, 442229, 442316, 428605, 428608, 428611, 428613, B22D 1100, B23K 2004
Patent
active
060459263
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a thin woven, knitted or braided (knotted) textile fabric made from bundles of metal filaments. The fabric thus possesses successive meshes, mutually separated and delineated by these bundles. The invention also relates to a method for the manufacture of these sheets and the application thereof as a separation sheet for the shaping of glass plates in moulds.
Meshed metal fibre fabrics made from twisted filament or fibre bundles and having a thickness greater than 0.5 mm are known. The bundles must be twisted in order to enable them to be processed subsequently eg. on weaving, knitting or knotting machines without breaking.
If however, for the purpose of realising very thin sheets, very thin twisted bundles have to be used, it is difficult to avoid fibre breakages (during the weaving, knitting or braiding process), particularly on the outer surface of the bundles. The bundle surfaces thus attain a hairy appearance, making the surface of the fabric more or less rough.
It is also known, for example from WO 94/01372 from the applicant, to use meshed metal fibre sheets as separation sheets for the shaping of glass plates, such as vehicle windscreens, in moulds. In order to be able to realise an appropriate heat transfer during shaping, very thin sheets will preferably be used for certain types of windscreen. The high shaping temperature causes the glass surfaces to soften somewhat. The metal fibre separation sheets, which are located during shaping between the hard mould surface and the glass sheet, must however not impress their textile texture in, nor transfer it to the somewhat soft glass surface. In other words, the surface of the sheets must be relatively smooth (not hairy).
PURPOSE AND OBJECT OF THE INVENTION
The purpose of the invention is thus to obtain a thin meshed metal fibre fabric with smooth sheet surfaces.
The invention meets this requirement by providing a textile fabric with a thickness of less than 1 mm, e.g. between 100 and 500 .mu.m, which contains bundles of metal filaments obtained by bundled drawing and whereby the mesh delineating bundles in the fabric consist of filaments running virtually parallel. The weight of the fabric will preferably lie between 200 and 400 g/m.sup.2. If a woven or knitted fabric is envisaged with a smooth but simultaneously an even surface--and thus small meshes--the mesh openings will preferably be smaller than 1 mm.sup.2.
The equivalent filament diameter of the bundle-drawn metal filaments, e.g. stainless steel filaments, lies between 1 and 25 .mu.m, and preferably between 8 and 25 .mu.m.
The invention also comprises a method for the manufacture of these textile fabrics. The substantially parallel arrangement of the filaments in the bundles is obtained according to the invention by processing a number of drawn composite wires, in which the bundled metal filaments are embedded in a composite matrix, into a fabric by weaving, knitting or braiding and by subsequently removing the composite matrix from the sheet, e.g. by etching, dissolving or melting it away. In order to realise the most uniform possible smoothness and/or permeability in the fabric, the sheet can subsequently be compacted by rolling or by isostatic pressing.
The invention relates in particular to the application of the fabric as described herein as a separation sheet for the shaping of glass plates in moulds. These moulds may contain a ring-shaped support as an aid for the shaping of glass plates. This support is then covered in an appropriate manner with a separation sheet according to the invention. The shaping surface itself of the mould can of course also be covered with the aforementioned separation sheet.
It is also an object of the invention to design hybrid textile fabrics comprising plain wires next to the metal fiber bundles, in at least one direction in the plane of the fabric. These plain wires have a thickness of preferably not more than 150 .mu.m. The resulting fabric can thus be rigidified in a preferential direction since the
REFERENCES:
patent: 2050298 (1936-08-01), Everett
patent: 5071713 (1991-12-01), Francois
Van De Velde Philippe
Van Steenlandt Wim
Morris Terrel
N.V. Bekaert S.A.
Singh Arti R.
LandOfFree
Thin textile fabric comprising bundles of metal filaments does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Thin textile fabric comprising bundles of metal filaments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thin textile fabric comprising bundles of metal filaments will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-363292