CN106676738A

CN106676738A - Method for weaving weft knitting curved surface forming fabric

Info

Publication number: CN106676738A
Application number: CN201510770608.7A
Authority: CN
Inventors: 张毅; 吴波伟; 张睿
Original assignee: Tianjin Polytechnic University
Current assignee: Tianjin Polytechnic University
Priority date: 2015-11-06
Filing date: 2015-11-06
Publication date: 2017-05-17
Anticipated expiration: 2035-11-06
Also published as: CN106676738B

Abstract

The invention discloses a method for weaving a weft knitting curved surface forming fabric and relates to the technical field of weft knitting curved surface forming weaving processes. According to the method, mainly through the invention of a weaving process, by utilizing afterdischarge form drop stitch, during weaving drop stitch, a new processing weaving needle is smoothly hooked with yarn; by utilizing the weaving of a weft knitting air layer curved surface forming fabric, air layer weaving is first performed on a backneedlebar and then performed on a leading bar, so as to shorten the weaving distance between two air layers, so holes in the narrowing and drop stitch joints disappear, and a more perfect weaving method is provided for the weft knitting curved surface forming fabric with more uniform weaving stress. According to the method, not only is the problem that the new processing weaving needle cannot be hooked with the yarn when weft knitting forming fabrics are subjected to too much drop stitch solved, but also hole phenomena in the weaving air layer curved surface forming fabric are avoided, and the method is favorable for popularization of use of weft-knitted fabrics as textile composite enhanced bodies.

Description

A kind of weaving method of weft-knitted curved surface forming fabric

Technical field

The present invention relates to weft-knitting fabric curved surface forming weaving technical field of weaving.

Background technology

In recent years, the shared proportion in whole textile industry of fabrics for industrial use constantly rises, wherein as spinning The proportion of the reinforcement of Woven composite is also increasing.Weft-knitted fabric has good formability, ductility With can weave three-dimensional full mouldability, its finished product has good shock resistance fatigue durability, high-energy absorption, and With higher production efficiency.Therefore, extensively use using it as the weft knitted fabric reinforced composites of reinforcement In various fields such as military project, automobile, space flight, navigation, traffic, building and medical treatment.

Weft-knitting is primarily adapted for use in planar shaping braiding, when for curved surface forming, need to shift shape using coil Formula is completed, so that curved surface fabric entirety stress it is irregular and limit its application, it is therefore necessary to study its curved surface Knitting and forming technique.Weft-knitting curved surface forming weaving method mainly has：The mode that combined using Various Tissues, By way of changing loop length, using the method for knitting, wherein using using the method for knitting molding It is the most extensive.During the method braiding using knitting molding, by increasing or decreasing knitting needle of working Number, or change the stringer number of fabric, it is to reach the purpose of knitting forming fabric but excessive for some widening Design, be easily caused newly plus operating needles cannot yarn on hook, braiding is smoothed out, and weave latitude Eyelet is formed when compiling air layer curved surface forming fabric in knitting seam so as to which, when reinforcement is done, curved surface is received Power is irregular, and stress weakness is produced easily at eyelet.

The content of the invention

The purpose of the present invention is for above-mentioned widening is excessive stylish plus operating needles cannot yarn and braiding on hook The problem for occurring eyelet during air layer curved surface forming fabric provides a kind of new weaving method.

It is contemplated that can effectively solve the problem that during weft-knitted curved surface forming weaving textile, widening is stylish plus work is knitted Pin cannot on hook yarn problem so that braiding can be smoothed out, and not limited by widening pin number；And compiling When knitting weft-knitted air layer curved surface forming fabric, it is to avoid eyelet occur in knitting junction so as to doing reinforcement When, curved surface uniform force.

Weaving

The present invention is developed using LongXing KnitCAD software designs, using the imperial star computer horizontal of 12 needle-like Machine carries out machine test braiding.

Curved surface forming fabric be by curved surface figure being launched into the planar graph of multiple similar shapes (Fig. 1), Required curved surface forming fabric can be woven with reference to circle knitting is held in the principle of plane knitting.Concrete braiding Step：

(1) according to the curved surface figure of required braiding, by known curvature radius, calculate and start to participate in braiding Pin number and braiding stringer number.

(2) curved surface figure is launched into the planar graph of multiple similar shapes, design cycle number n (n is bigger, Its curved surface fabric while increases braiding difficulty closer to required fabric).

(3) according to braiding knitting principle, it is determined that participating in the knitting needle number of braiding per a line.

(4) according to the planar graph for launching, on LongXing KnitCAD softwares weft-knitted curved surface is designed The two-dimensional template of forming fabric.Here is wherein：

A. when curved surface braiding widening is designed, form is put after employing (i.e. using in the tail end for weaving a certain widening row Newly add operating needles), such as Fig. 2.

B. for air layer curved surface forming weaving textile, when design air layer weaves, compiled in rear needle-bar using elder generation Knit, then in the braiding of front needle-bar, weave as cycling element circulation, such as Fig. 3.

Other steps that re-pack are identical with routine.

(5) model storage file is copied on Computerized flat knitting machine, reads file, then start to perform braiding.

The present invention principle be：Form is put after employing, the yarn mouth when widening row is woven is reduced and is taken yarn out of Distance so that newly add yarn on the smooth hook of operating needles energy, can be smoothed out so as to weave, this form can be solved When widening is excessive, new plus operating needles yarn cannot be asked on hook certainly general weft-knitting curved surface forming fabric Topic.Using braiding of the aforesaid way to weft-knitted air layer curved surface forming fabric, air layer braiding is using first in rear pin Bed braiding, then in the braiding of front needle-bar, braiding distance (Fig. 4) of two air interlayers is reduced with this so as to receiving Widening junction eyelet disappears, so as to realize without eyelet weave effect.

Description of the drawings

1st, Fig. 1 weft-knitted fabrics Doubly curved surfaces are plane graph

2nd, Fig. 2 braidings widening form design figure

3rd, Fig. 3 air Rotating fields weave diagram

4th, Fig. 4 air Rotating fields woven stitch figure

5th, Fig. 5 air layers curved surface forming fabric material object design sketch

Braiding result

For the weft-knitted curved surface forming fabric of method braiding using knitting, form widening is put by after, not only made Braiding can be smoothed out, and not limited by widening pin number, so that the radius of curvature of curved surface forming fabric It is arbitrarily controllable, and curved surface forming fabric face is more smooth.

When form widening is put after utilization to air layer curved surface forming weaving textile, air layer braiding is using first in rear pin Bed braiding, then in the method for front needle-bar braiding, knitting junction is realized without eyelet effect.Its effect in kind It is in kind with tradition braiding to contrast, as shown in Figure 5.

Claims

1. a kind of weaving method of weft-knitted curved surface forming fabric is it is characterized in that for traditional curved surface forming weaving method widening is excessive stylish plus operating needles yarn and cannot occur the problem of eyelet during braiding air layer curved surface forming fabric on hook, this invention has using value and processing directive significance for weft-knitted fabric as composite material for weaving reinforcement.

2. according to claims 1, when the braiding widening of weft-knitted fabric curved surface forming is designed, form (newly adding operating needles using in the tail end for weaving a certain widening row) is put using after, general weft-knitting curved surface forming fabric is solved when widening is excessive, new plus operating needles cannot on hook yarn problem.

3. according to claims 2, for weft-knitted air layer curved surface forming weaving textile, when design air layer weaves, woven in rear needle-bar using elder generation, then in the braiding of front needle-bar, woven as cycling element circulation, it is set to disappear in knitting junction eyelet, so as to realize without eyelet weave effect.