DE102004063683A1 - Production of double-face leno fabric, e.g. for floor covering, involves a dense weave with different tensions and thickness in base and twist warp - Google Patents

Abstract

A fabric of leno or gauze construction has a dense weave comprising a thin base warp (1) and a thick twist warp (3). The warp tensions are controlled so that the twist warp yarns (3) cross the base warp yarns (1) in a plane parallel to the weft (2) yarns. The twist warp yarns (3) are placed above the base warp yarns (1) in the weave. The weft yarns (2) are sufficiently close to give a rigid structure and almost completely cover the virtually straight base warp yarns (1). Independent claims are also included for the following: (1) The corresponding weaving process in which the tension in the twist warp is appreciably lower than in the base warp; (2) A loom to carry out the process including separate drives and tension control sensors for the two warp beams and sensors.

Description

The The invention relates to a method for producing a from on or multicolored weft and warp threads existing fabric in leno weave.

The The invention further relates to a loom for carrying out the Manufacturing process.

Out DE 100 04 376 A1 For example, a method for making a leno base fabric and a loom for carrying it out is known.

Proceeding according to under Maintaining the shed forming process known from tissue engineering by means of at least a first and a second strand frame the leno ground fabric are made.

The Production of the leno base fabric takes place in that Halflitzen known per se with lifting healds are used for shedding.

One important aspect in the production of such a fabric forms the warp tension of both the so-called Steherfadenkette and the Dreherfadenkete.

It has been shown that at a larger nominal warp tension of the Steherfadenkette than the desired warp tension of the leno thread chain, the quality of Tissue is sufficient in terms of slip resistance.

When disadvantageous in such a weaving machine, however, has the short life of half shots used for shedding with Hawseering exposed.

adversely is further that the only two with the half and lifting healds equipped shaft frame require a costly shedding machine, like this one does not differ, in terms of the cost of a weaving machine with a much larger number of heald frames.

It is also known from DE 101 28 538 A1 a weaving machine for producing a leno fabric, in which the drive of the weaving shed-forming means, that is, the means, in which the Steherkettfäden and Dreherkettfäden are drawn and guided, is derived from the drive means of the loom itself.

The Webfachbildenden means here are not integrated in the shaft frame Half flashes with lifting healds, but a so-called leno needle reed and a stayer needle-reed. Each needle reed has a variety of needles, at whose free end at least one eyelet for passing the Dreherkettfadens or the Steherkettfadens is provided. The needles each needle reed are separated by flat bars to secure that in each case a leno warp thread in the production of leno weave just skip a needle of the Steyrie can.

In the previously known DE-document 101 28 538 A1, the leno and warp ends provided by at least one Unterkettbaum and over at least supplied a bowing the webfachbildenden means. Therefore own the leno warp threads and the Steherkettfäden one and the same warp tension. With the uniform warp tension in the leno and stay warp threads It goes without saying that there are qualitative differences between the leno and vertical warp threads, In particular, the fineness of the warp yarns or threads concerning largely excluded are. In that regard, it is understandable that the diversity of Patterning in such tissues is limited.

outgoing thereof, the invention is based on the object, a weaving method for the manufacture of leno-weave fabrics, in particular allows a different incorporation of leno and Steherkettfäden and with regard to the pattern compared to the state of Technology a greater variety allows.

Further It is an object of the invention, a loom for carrying out the Web process to create.

The Task according to the manufacturing method according to the invention thereby solved, that first warp threads as leno warp threads from a first warp beam and second warp threads as upright warp threads from one second warp beam be provided for fabric formation and thereby the leno warp threads in the first shed forming means and the Steherkettfäden in the second shed forming Funds are recovered. Both types of warp threads are in the binding point of the fabric to be produced.

Due to the fact that the upright warp threads and the leno warp threads are provided by separate warp beams equipped with an electromotive warp let-off, the warp tension in the respective warp can be individually predetermined and controlled as the target warp tension. Thus, in order to achieve a characteristic weave in leno weave, the upholstery warp threads can consist of a much coarser warp material than the leno warp threads and the warp tension of the warp warp threads can which is several times the warp tension of the leno warp yarns.

at a yarn count of the leno warp yarns of e.g. Polyester 22 dtex and the Steherkettfäden of e.g. Polyester 1100 dtex and the wefts of e.g. Polyester of any kind Garnfeinheit will receive a fabric in leno weave, in which the warp ends emerge visually dominant on one side of the fabric, while on the other side of the fabric, the weft threads are visually dominant. The leno warp threads due to their fineness of 22 dtex are imperceptible to the naked eye in the tissue.

to Obtaining another characteristic weave in leno weave can Groups of standing warp threads in the weaving-forming agent of the leno warp threads and, accordingly, vice versa Groups of leno warp threads be retracted into the Webfachbildende means of Steherkettfäden.

at Use of the above yarn counts for the warp and the weft occur on the top and bottom of the fabric, the weft threads in the first Tissue sections visually dominant out, while in second tissue sections the warp ends visually dominant emerge. In this way, e.g. Dreherbindige fabric with longitudinal stripes getting produced.

Of others can particularly dense fabrics with non-slip structure are produced. It are fabrics with a so-called double-face property at clearly reduced effort to produce warp yarns. Here, "double-face property" means that the foreground and back the leno fabric have different performance characteristics. For multicolor weft material and monochrome warp material e.g. can they Colors of weft threads clearly emerge on only one side of the fabric while on the other fabric side the Steherkettfäden are clearly visible and the colors of the weft threads themselves visually blurry, so indistinct represent.

tissue with these properties could so far only by material-consuming Atlas or twill weaves getting produced. By a corresponding selection of yarn counts for the shot and warp threads and at a suitable warp tension of the leno and riser warp threads the double-face property of the leno fabric according to the invention also at very thin and light leno fabrics achieved.

The inventive manufacturing method is for a wide range of warp and weft yarns applicable. Especially Every tear-resistant yarn type is suitable as a ground warp thread.

weaving tests Applicants have shown that with the use of e.g. Polyester leno warp threads the Fineness 22 dtex a leno fabric with a high thread density and high incorporation can be produced. This advantage can be both in weaving home textiles and weaving technical Use tissues.

to execution the production process according to the invention a weaving machine is provided, the at least a first, rotationally driven Warp beam for supplying leno warp yarns and at least a second, has a revolving warp beam for the delivery of upright warp threads.

Everyone Kettbaum has an electromotive warp let-off as a rotary drive on, the signal transmitting with a central weaving machine control connected is.

to Deflection of the warp thread share dropped from the respective warp beam in the direction of the web-forming means each warp beam is a so-called Subjacent to the paraxial axis. A first bunch of warps, which consists of a variety of Dreherkettfäden is doing in one first webfachbildendes agent recovered, subsequently by a second web-forming agent and passed through a reed and in the so-called binding point of the fabric to be produced with a second Kettfadenschar merged.

The second warp thread, which consists of a plurality of vertical warp threads, is passed through the first web forming means, below pulled into a second web-forming agent, then by passed the reed and merged in the binding point with the first Kettfadenschar.

to Signaling possibly occurring warp thread breaks goes through the first and second warp sheet a warp stopper, which between the webfachbildenden Funds and the match trees is arranged.

Either in the Dreherkettfadenschar as well as in the Steherkettfadenschar are for separate detection and for the separate influencing of the Warp tension of the leno and warp ends Means in kind of voltage sensors provided with the loom control a signal transmitting are connected.

According to a method feature of claim 1, the upright warp yarns are to be subjected to a higher warp tension than the leno warp yarns. For this purpose, that will be after the bin Depunkt finished fabric almost completely wrapped by a rotationally driven fabric take-up roller and then guided over suitable guide rollers to a rotary driven cloth beam and wound up by this.

The Rotary driven tissue roller stands, as the first and second Warp beam, with a separate electric motor drive in operative connection, which also transmits signals is in communication with the loom control. This can by means of the aforementioned voltage sensors in the respective Kettfadenschar detects the actual warp tension and transmitted as an electrical signal of the weaving machine control be in the basis of a reference-actual value comparison, the deviation is determined by a predetermined desired warp tension. at determined deviations from the desired warp tension is the relevant electromotive drive of the respective warp beam in the sense of increase or lowered the warp tension.

The aforementioned first and second web forming means are so-called Nadelriete, which, as well as the moving drive means, inter alia DE 101 28 538 A1 are known. It is therefore because of their structure and their mode of action referred to the known document.

Known are also the means for entering the weft in one out the leno and stay warp threads imageable shed. As a precaution, however, it should be noted that are mechanically driven means, e.g. belt or rod-guided weft gripper or pneumatic or hydraulic means, e.g. emerging from nozzles Air or leaking water is.

The Invention will be explained in more detail with reference to an embodiment.

In the attached drawings show:

1 the schematic representation of the loom for process implementation in cross section,

2 the schematic representation of the loom for process implementation in cross section with the Nadelriet as webfachbildendes means for the Steherkettfäden and

3 the schematic representation of the weaving machine for process implementation in cross section with the Nadelriet as webfachbildendes means for the leno warp threads.

The loom shown schematically 1 owns a first warp tree 2 with the leno warp threads 3 and a second warp beam 4 with the stay warp threads 5 , The first warp tree 2 has an electromotive warp let-off 6 while the second warp beam 4 an electromotive warp let-off 7 has.

Both Kettablassmotoren 6 . 7 are each via a control line 8th respectively. 9 signal transmitting with a weaving machine control 10 connected.

While the Steherkettfäden 3 over an axis parallel to the first warp beam 2 arranged string tree 11 in the direction of the web-forming means 12 run, are the Steherkettfäden 5 via another paraxial to the second warp beam 4 arranged string tree 13 in the direction of the web-forming means 12 guided.

Web-forming means 12 exist as if DE 101 28 538 A1 is known, from a first Nadelriet 12a , in whose needles the leno warp threads 3 are retracted and from a second Nadelriet 12b in whose needles the standing warp threads 5 are retracted.

The leno and stay warp threads 3 . 5 subsequently go through a reed 14 on a sycamore 15 is attached. Finally, the leno and the warp warp threads 3 . 5 in a binding point 16a of the leno fabric 16 merged and form together with a weft thread, not shown here, the reed 14 to the binding point 16a strikes and set the leno and Steherkettfäden, the finished leno fabric 16 ,

The finished leno fabric 16 is successively via a fixed tissue table 17 , a guide roller 18 and one with a separate electric motor drive 19 equipped feed roller, from which it passes through a nip between the drawing-in roller 20 and a pressure roller 21 via another guide roller 22 to the goods tree 23 get wound up on it.

The mentioned rollers are rotatably mounted in a machine frame, not shown here, which is also the fabric table 17 wearing.

In the area between the match trees 11 . 13 and the web-forming means 12 run the leno and Steherkettfäden 3 . 5 through a warp stopper 24 Its on the warp threads 3 . 5 spreading lamellae 24a detect a warp thread breakage. Between the corresponding string tree 11 . 13 and the warp stopper 24 is in the Turner and Stonethread chain 3 . 5 a warp tension sensor 25 . 26 arranged; both warp tension sensors 25 . 26 are each a signal management 25a respectively. 26a with the loom control 10 signal transmitting connected.

Because also the retraction roller 20 a separate electric motor drive 19 which also has signal lines 19a . 19b with the loom control 10 connected signal transmitting, here is a system for controlling or regulating the warp tension before, by means of which target-actual value comparisons the predetermined desired warp tension in the leno and Steherfadenkette 3 . 5 can be maintained.

With regard to the structure and operation of the webfachbildenden means and their drives is on the DE 101 28 538 A1 directed.

Unlike the in 1 and in the DE 101 28 538 A1 illustrated webfachbildenden means 12 disclosed 2 a possibility of vertical displacement of the weaving layer 27 gem. 1 the use of only one needle-reed in the web-forming means 12 allowed.

2 shows the vertical offset of the web-forming means 12 , the reed 14 with batten 15 as well as the tissue table 17 from the original web layer 27 into the web layer 27a , In this case, it is sufficient if only for the Steherkettfäden 5 a stilted needle 12b is provided for forming a sub-compartment. It is also sufficient if for the lifting of the leno warp threads 3 to form a top tray the leno-Nadelriet 12a a conventional lamella reed is because the movement of the leno warp threads 3 from the upper compartment into the lower compartment with the upper Rietbund 12a ' of the lamellar rake can be effected while the return of the leno warp threads 3 from the lower compartment to the upper compartment, see also 2 due to the warp tension prevailing in the leno warp yarns.

In 3 is the vertical offset of the web-forming means 12 , the reed 14 with batten 15 as well as the tissue table 17 from the original web layer 27 into the web layer 27b shown.

The warp stopper 24 is in the direction of the web-forming means 12 one the turner and Steherkettfäden 3 . 5 approximately in the arrangement level of Kettfadenwächterung holding down device 28 intended. Because of this it is sufficient, if only for the leno warp threads 3 a rotary needle godfather 12a is provided to form a top compartment. It is also sufficient if for lowering the leno warp threads 3 for the education of a Unterfaches the Steherriet 12b a conventional lamellar reed is because the Steherkettfäden 5 after changing the shed of the leno warp threads 3 in the lower Rietbund 12b ' of the stately home 12b can be supported to form a top subject.

It should again be noted that the drive of the webfachbildenden means 12 regardless of whether it is a Nadelriet or a conventional lamellae, from the DE 101 28 538 A1 is previously known and therefore omitted in the present invention description on the repetition of the structure and operation. Nevertheless, it should be noted that the in the 1 to 3 Looms shown schematically have a main drive shaft, which with an electric motor drive 29 is operatively connected, and from which main drive shaft of the drive for the reed 14 , the needle or Lamellenrietes 12a and the needle or Lamellenrietes 12b is derived with the interposition of gear means.

The drive connection between the drive motor 29 and the reed shaft 30 is symbolic by the double arrow 31 shown.

It goes without saying that the drive 29 via corresponding signal lines 29a . 29b with the weaving machine control 10 signal transmitting connected.

1

loom

2

warp beam

3

leno

4

warp beam

5

warp ends

6

let-off motor

7

let-off motor

8th

signal line

9

signal line

10

loom

11

medium (Back rest)

12

webfachbildende medium

12a

Needle bar / slat Riet

12b

Needle bar / slat Riet

12a '

Riet Bund

12b '

Riet Bund

13

medium (Back rest)

14

reed

15

batten

16

Gauze

16a

binding point

17

cloth table

18

deflecting

19

drive

19a

signal line

19b

signal line

20

medium (Tissue drag roll)

21

deflecting

22

deflecting

23

cloth beam

24

warp stop motions

24a

Kettwächterlamelle

25

medium (Kettspannungssensor)

25a

signal line

26

Means (Kettspannungssensor)

26a

signal line

27

Web tier

27a

Web tier

27b

Web tier

28

Stripper plate

29

drive

29a

signal line

29b

signal line

30

reed shaft

31

double arrow

Claims (17)

Method of making one or more colors Weft and warp threads existing fabrics in leno weave on weaving machines, being first warp leno and second warp threads warp ends are, with the leno warp threads of at least a first warp beam and the Steherkettfäden of provided at least a second warp beam for fabric formation be, with the Steherkettfäden in first shed and the leno warp in the second shed Fed funds and merged in the binding point of the tissue, wherein the Steherkettfäden a higher one Warp tension are exposed as the leno warp yarns, wherein tied off at least one weft thread between the leno and Steherkettfäden becomes, whereby the Steherkettfäden comparatively coarser as the leno warp threads and wherein the incorporation of the leno warp yarns is other than that Incorporation of the stay warp threads. The method of claim 1, wherein the entirety the leno warp threads drawn into the first web-forming agent and the whole the Steherkettfäden are drawn into the second web-forming agent. The method of claim 1, wherein one or more Groups of leno warp threads into the second web-forming agent and one or more groups of vertical warp threads are drawn into the first web-forming agent. The method of claim 3, wherein each group of leno and upright warp threads one each has identical number of warp threads. Tissue-weave fabric made according to the characteristics of the claims 1 and 2, after which the Steherkettfäden emerge visually dominant on one side of the tissue and the weft threads emerge visually dominant on the other side of the fabric. Tissue-weave fabric made according to the characteristics of the claims 1 and 3, according to which on the top and bottom of the fabric in dependence on the size of the groups of leno and stay warp threads weft yarns partially visually prominent emerge. Weaving machine for carrying out the method according to claim 1, comprising - at least one first, rotary-driven warp beam ( 2 ) with leno warp threads ( 3 ) and at least one second, rotary-driven warp beam ( 4 ) with upright warp threads ( 5 ), - at least one each warp beam ( 2 . 4 ) subordinate means ( 11 . 13 ) for the separate deflection of the leno and stay warp threads ( 3 . 5 ), - Medium ( 25 . 26 ) for separate detection and for separately influencing the warp tension of the leno and pile warp threads ( 3 . 5 ), - a first web-forming agent ( 12a ), the leno warp threads ( 3 ) and a second weaving-forming agent ( 12b ), which the Ständerkettfäden ( 5 ), the first web-forming means ( 12a ) with the batten ( 15 ) of the weaving machine ( 1 ) and the second weaving means ( 12b ) involving gear means with a high-speed shaft of the loom ( 1 ) is drivingly connected, - means for introducing a weft thread into one of the leno and upright warp threads ( 3 . 5 ) formable shed, - one of the batten ( 15 ) worn reed ( 14 ), the weft thread to the binding point ( 16a ) of the tissue ( 16 ) and - means ( 20 ) for deduction and funds ( 23 ) for winding up the finished fabric ( 16 ). Weaving machine according to claim 7, wherein the first and second warp beam ( 2 . 4 ) an electromotive warp let-off ( 6 . 7 ) has as a rotary drive. Weaving machine according to claim 7, wherein the means ( 11 . 13 ) for the separate deflection of the leno and stay warp threads ( 3 . 5 ) preferably each form a coating tree. Weaving machine according to claim 7, wherein the high-speed shaft drives the main shaft of the loom ( 1 ). Weaving machine according to claims 7 and 8, according to which the means ( 25 . 26 ) for separately detecting the warp tension of the leno and stay warp threads ( 3 . 5 ) Tension sensors and the means for separately influencing the warp tension of the leno and upright warp threads the respective electromotive warp let-off ( 6 . 7 ). Weaving machine according to claim 11, wherein the tension sensors and the respective electromotive warp let-off with an electronic weaving machine control ( 10 ) are connected signal transmitting. Weaving machine according to claim 7, wherein the first weaving means ( 12a ) is a Nadelriet that at least at the outer ends of each one about a geometric axis ( 32a ) pivotable needle post support ( 32 ), wherein the needles of the Nadelrietes have a free upper end, the end region comprises at least one Fadenführungsöse and then the second weaving-forming means ( 12b ) transversely to the course of the leno and vertical warp threads ( 3 . 5 ), wherein the needles of the Nadelrietes have a free lower end, the end region has at least one Fadenführungsöse. Weaving machine according to claim 7, wherein the first weaving means ( 12a ) is a conventional lamella reed and the second shed-forming agent ( 12b ) is a Nadelriet, wherein the needles of Nadelrietes have a free lower end, the end region has at least one Fadenführungsöse. Weaving machine according to claim 7, wherein the first weaving means ( 12a ) is a Nadelriette, wherein the needles of the Nadelrietes have a free upper end, the end portion has at least one Fadenführungsöse and then the second weaving-forming means ( 12b ) is a conventional lamella reed. Loom according to claim 7, wherein the means for Entering the weft thread mechanical means, e.g. Weft gripper are. Loom according to claim 7, wherein the means for Entering the weft pneumatic or hydraulic means are.