CN2466179Y

CN2466179Y - Biaxial multilayer lining welf-knitting fabric

Info

Publication number: CN2466179Y
Application number: CN 00267570
Authority: CN
Inventors: 邱冠雄; 刘梁森; 姜亚明; 高宗跃
Original assignee: Tianjin Polytechnic University
Current assignee: Zhejiang Jinda New Material Co., Ltd.
Priority date: 2000-12-25
Filing date: 2000-12-25
Publication date: 2001-12-19
Anticipated expiration: 2010-12-25

Abstract

The utility model relates to an axial weft knitted fabric, particularly a bi-axial weft knitted fabric which uses one plus one ribwork as a tying system. The utility model is characterized in that the tying system 6 is at least inwoven with two layers of lining weft yarn 1, 2 or 3 which are in parallel and straight state. The utility model has good mechanical property, the compactibility of three-dimensional curve (such as hemispherical shape) is especially good, and the usual arching or wrinkle phenomenon of a general fabric is avoided. The utility model can be used as a skeleton of high-grade composite material.

Description

Twin shaft is to multilayer lining yarn weft-knitted fabric

The utility model relates to weft-knitted fabric, is specially twin shaft to weft-knitted fabric.International Patent classificating number intends being D04B 1/00.

Knitting axial fabrics is used to do the skeleton of composite, have that production cost is low, speed of production is fast, structural integrity is good, flexible design, thickness direction powerfully improve, mouldability (being directed to some structure) and to the plurality of advantages such as permeate well of resin preferably, thereby obtained in practice using widely, caused people's extensive concern more and more.Wherein, multi-axial tricot (Multiaxial Warp Knitted Fabrics, be called for short the MWK fabric) come across the eighties initial stage the earliest (referring to " exploitation and the industry of combing weft inserted warp knit fabric are used more ", 90-TEXT-7 number-Ko of ASME paper, F.K., Bruner, J., Pastore, A.﹠amp; Scardino, F., Developmentof multi-bar weft insertion warp knit fabric for industrialapplications, ASME Paper No.90-TEXT-7, October 1980), existing till now vicennial developing history.Developed country at present widely with the MWK fabric applications among fields such as automobile, Aeronautics and Astronautics, shipbuilding, civil buildings and civil engineering (referring to " high-tech fibrous material: composite, bio-medical material, protective clothes and geotextiles "---High-tech fibrousmaterials:Composites, biomedical materials, protective clothingand geotextiles, P81-89, Chapter 5.American chemical Society, 1991)).Particularly the U.S. and West Germany are in the exploitation of MWK fabric and use and be successful.For example, the U.S. once repeatedly was incorporated into the research of MWK fabric reinforced composite in the NASA key project (referring to following document: 1. " sew up the application of reinforcing material on the transportation wing ", NASA first advanced composite material technical conference---Raymond J.Palmer, Marvin B.Dow﹠amp; Donald L.Smith.Development of stitching reinforcement for transport wingpanels, First NASA Advanced Composites Technology Conference, Vol.2, P621-646 (1991); 2. " NASA composite material for weaving project summary ", composite is with advanced technical fiber and the 6th meeting of fabric construction---Dexter H.B., An overview of theNASA textile composites program, Sixth Conference on AdvancedEngineering Fibers and Textile Structure for Composites, P1-31,1992; 3. " performance of the compound Multi-axial Warp Knitted Fabric for Composites of resin transfer moulding method ", the 3rd advanced composite material technical conference of NASA---Dexter H.B., Haske Gregory H., Performanceof resin transfer molded multiaxial warp knit composites, ThirdNASA Advanced Composites Technology Conference, Vol.1, P231-261,1993).But at present the twin shaft that uses is relatively poor to the formability of tricot, and particularly arch camber or wrinkling easily after the moulding causes that stress is concentrated, mechanical properties decrease, can not adapt to the requirement of making the high-performance composite materials skeleton.Thereby the developed countries novel weft-knitted axial fabrics (or claiming axial weft-knitted fabric) that begun one's study.For example, the report that can see is: moral Christopher Eccleston (Dresden) university of Germany, and researching and developing out with the rib stitch on the V-type straight-bar machines is that the twin shaft of bondage system is to weft-knitted fabric (referring to German Dresden university scientific achievement); The Kao Fa C Compaq (COFAB) of American South card, on the single-needle circular knitting machine, research and develop with the latitude plain stitch be the bondage system twin shaft to weft-knitted fabric (being the two-layer lining yarn woven fabric of laying-in inlaid thread) (referring to: www.cofab.com), but its structure is identical with traditional laying-in inlaid thread fabric tissue, and further particulars did not retrieve at present.

The purpose of this utility model is at the deficiencies in the prior art, provides a kind of twin shaft to multilayer lining yarn weft-knitted fabric.It has mechanical property and splendid formability preferably, and with low cost.

The purpose of this utility model is following realization: design a kind of with the 1+1 rib stitch be the twin shaft of bondage system 6 to weft-knitted fabric, it is characterized in that inweaving at least in the described bondage system 6 two-layer in

stuffer weft

1,2 or 3, and it is parallel straight state.

Twin shaft described in the utility model to weft-knitted fabric owing to will serve as a contrast at least into two-layer lining yarn (can inweave at most 5 layers lining yarns), thereby be named as twin shaft to multilayer lining yarn weft-knitted fabric (Multi-layeredBiaxial Weft Knitted Fabrics is called for short MBWK or MBWK fabric).The weft knitting axial fabrics is a bondage system difference with distinguishing through the maximum of volume axial fabrics on fabric structure: the bondage system through compiling axial fabrics is warp plain stitch or pillar stitch, and the bondage system of weft-knitted axial fabrics is latitude plain stitch or 1+1 rib stitch.Because the plane ductility of weft organization is better than warp knitting fabrics, and again little than warp knitting fabrics to the constraint of lining yarn, therefore weft-knitted axial fabrics and be better than through compiling axial fabrics (comprising through the volume diclinic) itself to fabric with its composite material forming of making skeleton.Fabric described in the utility model is that a kind of brand-new twin shaft is to multilayer lining yarn weft-knitted fabric.Under the identical situation of fabric side density, though the same warp-knitted bi-axial of its mechanical property (as performances such as planar stretch and bendings) (laying-in inlaid thread) fabric is basic identical, but significantly be better than the traditional woven thing, particularly its mouldability will be far superior to the traditional woven thing, also is better than warp-knitted bi-axial (laying-in inlaid thread) fabric.Simultaneously, the production cost of MBWK fabric is also far below MWK fabric (hanging down 50% approximately), thereby the utility model also has a good application prospect and economic benefit.

Below in conjunction with embodiment and accompanying drawing thereof in detail the utility model is described in detail:

Fig. 1 is the structural representation of three layers of two-layer laying-in yarn of stuffer weft of the utility model;

Fig. 2 wears the structural representation that two skies, laying-in yarn two are worn two skies for the utility model stuffer weft one;

Fig. 3 is the structural representation of the two-

layer stuffer weft

1,3 of the utility model and one deck laying-in yarn 4;

Fig. 4 is the structural representation of the two-

layer stuffer weft

1,3 of the utility model and one deck laying-in yarn 5;

Fig. 5 is the structural representation of two-

layer stuffer weft

1,3 of the utility model and two-layer laying-in yarn 4,5;

Fig. 6 is the structural representation of three layers of stuffer weft of the

utility model

1,2,3 and one deck laying-in yarn 4;

Fig. 7 is the structural representation of three layers of stuffer weft of the

utility model

1,2,3 and one deck laying-in yarn 5;

Fig. 8 is the structural representation of the two-

layer stuffer weft

1,2 of the utility model and one deck laying-in yarn 4;

Fig. 9 is the structural representation of the two-

layer stuffer weft

2,3 of the utility model and one deck laying-in yarn 5.

The utility model design with the 1+1 rib stitch be the twin shaft of bondage system 6 to weft-knitted fabric, it is characterized in that inweaving at least in the described bondage system 6 two-layer in

stuffer weft

1,2 or 3, and it is parallel straight state (referring to arbitrary accompanying drawing).So-called " inweave at least in

stuffer weft

1,2 or 3 two-layer " is meant and inweaves two-layer or three layers, comprise inweaving stuffer weft: 1 and 2; 1 and 3; 2 and 3 or 1,2 and 3.

Twin shaft described in the utility model not only can only inweave described stuffer weft to weft-knitted fabric, and can also inweave laying-in yarn 4 or 5 simultaneously, or 4 and 5.And it also is parallel straight state (referring to Fig. 1).The utility model requires the stuffer weft inweaved and laying-in yarn " to be parallel straight state " to be based on the consideration of mechanical property, promptly serves as a contrast yarn and is parallel straight state, can give full play to the mechanics potential of yarn; Under the identical situation of Gram Mass, the utility model twin shaft improves 20%-40% to the planar stretch initial modulus and the fracture strength of weft-knitted fabric than plain fabric.

Figure 1 shows that the institutional framework form that the utility model is the most complicated, promptly inweave

stuffer weft

1,2,3 and laying-in yarn 4,5 simultaneously in bondage system 6, also is five layers of lining knot structure of three layers of two-layer laying-in yarn of stuffer weft.In addition, theoretical research and Practical Design prove, it is several below also having to be that the combination that inweaves laying-in yarn and stuffer weft in the bondage system 6 simultaneously changes structure at the 1+1 rib stitch:

(1)

inweaves stuffer weft

1,3 and laying-in yarn 4 (referring to shown in Figure 3);

(2) inweave

stuffer weft

1,3 and laying-in yarn 5 (referring to shown in Figure 4);

(3) inweave

stuffer weft

1,3 and laying-in yarn 4,5 (referring to shown in Figure 5);

(4) inweave

stuffer weft

1,2,3 and laying-in yarn 4 (referring to shown in Figure 6);

(5) inweave

stuffer weft

1,2,3 and laying-in yarn 5 (referring to shown in Figure 7);

(6) inweave

stuffer weft

1,2 and laying-in yarn 4 (referring to shown in Figure 8);

(7) inweave

stuffer weft

2,3 and laying-in yarn 5 (referring to shown in Figure 9).

The combining structure of above-mentioned (1)--(7) fabric is not three layers of lining yarn, is exactly four layers of lining yarn, and all five layers of lining yarn structural texture than shown in Figure 1 are simple.For this field those of ordinary skill, be easy to realize by the conversion process parameter.Should also be noted that except described (1)--(7) fabric composite structure, the textural association of simpler two-layer lining yarn can also be arranged, as, inweave stuffer weft 3 and laying-in yarn 5; Inweave stuffer weft 1 and laying-in yarn 4 (not providing among the figure).

Described in the utility modelly in bondage system 6, inweave stuffer weft, comprise also that any sky is worn to inweave (as shown in Figure 2) or/and laying-in yarn " inweaving " both had been meant that routine inweaved (as except that shown in each figure Fig. 2).Though Fig. 2 provides only is that stuffer weft one is worn the combining structure signal that two skies, laying-in yarn two are worn two skies, for this field those of ordinary skill, is easy to provide the structural representation that other form sky is worn, and can realize promptly also that any sky is worn to inweave.

But the 1+1 rib-loop bondage system 6 in the utility model fabric can adopt the thread material of any lopping, comprises the high performance yarns material.

The described laying-in

yarn

1,2,3 of the utility model fabric is or/and stuffer weft 4,5 can adopt the high performance yarns material according to the design needs.Described high performance yarns material is meant the material of good mechanical performance such as glass fibre, quartz fibre, aramid fiber, carbon fiber, high-tenacity polyethylene fibre, high-strength polyester fiber and high strength nylon fibre.

The utility model fabric is except having preferably mechanical property, and outstanding characteristics are to have splendid formability, can make various level and smooth three-dimension curved surface shape fabrics, do not have the arch camber or the fold phenomenon that are produced after the punch forming of present various fabric sphere.This is a quantum jump in the flat fabric field shaping technique, and the development and the exploitation of high-performance composite materials had significance.

Claims

One kind with the 1+1 rib stitch be the twin shaft of bondage system 6 to weft-knitted fabric, it is characterized in that inweaving at least in the described bondage system 6 two-layer in stuffer weft 1,2 or 3, and it is parallel straight state.
2. twin shaft according to claim 1 is to weft-knitted fabric, it is characterized in that also inweaving one deck laying-in yarn 4 or 5 in the described bondage system 6, and it also is parallel straight state.
3. twin shaft according to claim 1 is to weft-knitted fabric, it is characterized in that also inweaving two-layer laying-in yarn 4 and 5 in the described bondage system 6, and it also is parallel straight state.