Manufacturing a long bias cloth from a circular loom by spiral c

Details Manufacturing a long bias cloth from a circular loom by spiral c Manufacturing a long bias cloth from a circular loom by spiral c

1990-02-09

1993-01-12

Falik, Andrew M.

Textiles: weaving

Fabric manipulation

Cutter mechanism

139291C, 139457, 139 16, 26 82, 28190, 29 213, D03D 302, D03D 3700, D03J 108

Patent

active

051781930

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

This invention relates to a method and apparatus for continuously manufacturing a bias cloth which is useful directly as textile materials and industrially for belt, duct and structural materials for ships and aircrafts such as FRP, ACM (advanced composite material) and like reinforced materials when impregnated with a resin. More particularly, the present invention relates to a method and apparatus for continuously manufacturing a long bias cloth by continuously carrying out the steps of manufacturing a tubular fabric with a circular loom, taking out the tubular fabric from the circular loom under tension while preventing the formation of edge portions forming folds and wrinkles, etc., and spirally cutting the tubular fabric while holding it in tension.


DESCRIPTION OF PRIOR ART

The term bias cloth means a cloth wherein the yarns thereof are oriented on the diagonal relative to the length of the cloth. As bias cloth has a diagonal fibrous structure, it is distinguished by its bending-fatigue-resistance and curved surface-fitting property. Thus, a bias cloth made of synthetic fibers is suitable as textile material and is used for the manufacture of V-belts, ducts, bellows-hoses, etc. as a processed material impregnated with rubber or a synthetic resin. A bias cloth made of a yarn manufactured from fibers of high strength such as aramide fibers, glass fibers and carbon fibers is impregnated with a resin to form a reinforced material such as FRP or ACM, which materials have found increased utility in recent years as structural materials for ships, aircrafts, etc. or as sporting goods where strength is required. This bias cloth has been manufactured by diagonally cutting a cloth ordinarily woven with warps and a weft. However, a long bias cloth cannot be obtained according to this diagonal cutting method.
A long bias cloth can be obtained from, a tubular fabric woven by a circular loom and cut spirally, as disclosed, for example, in Japanese Laid-open Patent Appln. No. Sho. 59-22720 and Japanese Laid-open Patent Appln. No. Sho. 59-22721. According to the invention disclosed in Japanese Laid-open Patent Appln. No. Sho. 59-22720, a cylindrical core is inserted into a tubular fabric woven by a circular loom to adjust the configuration and density of warps and a release paper carrying a matrix resin film is bonded to the tubular fabric, which is then cut spirally in the lengthwise direction to obtain a bias prepreg. In Japanese Laid-open Patent Appln. No. Sho. 59-22721, there is disclosed a process for manufacturing a bias prepreg wherein a tubular fabric is cut spirally, along its lengthwise direction, for example, at an angle of 45.degree.. Prior to this cutting, the part to be cut out is fixed with a gum tape or the like. After cutting, cut out portion is fixed and then impregnated with a matrix resin. In Japanese Utility Model Publn. No. Sho. 61-13578, there is disclosed an apparatus for facilitating cutting of a tubular fabric in the spiral direction by marking the tubular fabric with a marking material moving perpendicular to the lengthwise direction of the tubular fabric while weaving on circular loom.
The methods and apparatus disclosed in these publications basically show the production of a bias cloth having a substantially unlimited length by cutting a tubular fabric spirally. These methods and apparatus can be applied to a tubular fabric woven with widely used synthetic yarns such as nylon, polyester, vinylon and like fiber yarns; but these methods and apparatus are not applicable to a tubular fabric woven with the above mentioned fibers of high strength, such as carbon fibers for manufacturing a bias fabric. In the above mentioned Japanese Laid-open Patent Appln. Nos. Sho. 59-22720 and 22721, for example, there is disclosed that a tubular fabric is woven so as to have a hollow weaving structure with an ordinary loom. However, when a tubular fabric is woven according to the hollow weaving method with a yarn of high strength fibers, strong tension is applied to the yarn on rev

REFERENCES:
patent: 608676 (1898-08-01), Herold
patent: 704566 (1902-07-01), Newell
patent: 1356485 (1920-10-01), Bunker
patent: 3784427 (1974-01-01), Griffin
patent: 3983720 (1976-10-01), Eschenbach et al.
patent: 4462431 (1984-07-01), Bosse et al.

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