EP0680528B1 - Process and installation for producing textile net-like fabrics - Google Patents

Abstract

A process and installation are disclosed for producing textile net-like fabrics by various bonding processes, for example warp knitting or stitch-bonding processes. In order to create a process and installation for producing textile, net-like fabrics with a large mesh, a high diversity of structures and a width which extends beyond the working width by various bonding processes, for example warp knitting or stitch-bonding processes, several adjacent groups of mesh side threads which form the mesh sides in the working direction are generated, at least one working thread (4) is tied up to at least one group (1) of mesh side threads, the working threads are led out of the group of mesh side threads across the working direction to form the other mesh sides transversely to the working direction, at least one working thread (4) is sunk into a loop to form reserves of working threads, and the working thread is tied up to at least one of the groups (1) of mesh side threads.

Description

The invention relates to a method for producing textile net-like fabrics according to the preamble of the claim 1 and a device for performing the method according to the preamble of claim 11.

In the textile industry, nets are usually made with known netting or. -knot machines by means of knot hooks or with known chains- or sewing machines made by means of latch or slide needles. The disadvantage here is that the product width by the working width and the network opening structure determines the structure variability severely limited by the procedures or only with great effort, as with the warp knitted mesh with a varying mesh size in the edge area, which the use of several laying rails and the variation of the Laying requires (JP 51-57041) to be realized. The products are due to the accumulation of threads in the knot area and the resulting Abrasion sensitivity and their low structural variability can only be used to a limited extent.

A modified warp knitting machine for processing is known Plastic yarns (DE 2706930) with parallel weft insertion, the connection the threads are made using welding swords. This corresponds to the product width that can be generated is only the working width of the machine. The net mesh geometry is due to the defined working width and determines the arrangement of the connecting elements, the welding swords. Furthermore, due to the chosen solidification process only processing thermoplastic material possible, so that Product is restricted in its possible applications.

Sewing machines are also known, on which square mesh networks can be manufactured (DD 269298). In doing so, they are transverse to the processing direction parallel weft threads fed and in the workplace at certain intervals across the processing direction of Piercing stitches and forming organs tied or bound by means of sewing threads wrapping around the warp thread. The disadvantage here is that only square mesh networks with continuous Weft and warp threads are realizable and also the distance between the weft threads fed or the distance between the wales Working organs among each other certain size of the network openings is only limited and can be changed with great effort. Furthermore, the maximum product width equal to the working width and the strength of the Products is due to the fact that also not on the stitch formation involved tip needles pierce the weft thread template, low.

DE-A-1 236 116 also describes the production of a net-like fabric in the form of a fillet, whereby Slip stitches exclusively using functional threads in Form of pattern threads are interconnected. Are there the pattern threads are guided, laid and bound in such a way that Neighboring slip stitches are not in sections with each other are connected and so network-like openings in Fabrics are given. It is also a disadvantage with this process that the width of the fabric by the width of the textile machine is determined and the distance adjacent slip stitch is not changeable. Three-dimensional fabrics cannot be produced.

EP-A-0 276 890 describes the production of a loop fabric, that is to say a solid, non-mesh-like basic knitted fabric, from warp thread sticks which are firmly connected to one another by means of integrated weft threads which run across the entire width. In addition , the basic knitted fabric also contains functional threads arranged individually between the warp thread rods, which are first drawn out into loops and then melted at the loop heads. The basic knitted fabric determines the flat structure, which is not network-like and whose width is determined by the width of the knitting machine that is being manufactured, and therefore cannot go beyond it. Furthermore, the production of three-dimensional fabrics is not possible.

Looking at the position of warp knitting at the technical textile market, Hans Lehner, Knitting International February 1991, Seiten 38 - 39; sowie

Sondervarianten für Nähwirkmaschinen, Peter Zeisberg, Melliand Textilberichte, Dezember 1991, Seiten 1008-1011,

sind die verschiedensten Kettengewirke und Nähgewirke und deren Herstellung beschrieben, so unter anderem auch die Herstellung netzartiger Gewirke mit rechteckigen Maschen. Allerdings werden die Schussfäden stets gestreckt, das heisst ohne Fadenreserven eingetragen, wodurch die Breite des Flächengebildes auf die Breite der Herstellungsmaschine beschränkt ist und dreidimensionale Flächengebilde nicht herstellbar sind.Also in the journal papers:

Looking at the position of warp knitting at the technical textile market, Hans Lehner, Knitting International February 1991, pages 38-39; such as

Special variants for sewing machines, Peter Zeisberg, Melliand Textile Reports, December 1991, pages 1008-1011,

the most varied warp knits and sewing knits and their production are described, including the production of mesh-like knitted fabrics with rectangular stitches. However, the weft threads are always stretched, that is, entered without thread reserves, as a result of which the width of the fabric is limited to the width of the production machine and three-dimensional fabrics cannot be produced.

The object of the invention is to create a method and a device to carry out the process according to various consolidation processes, for example, the warp or sewing process Manufacture of textile, mesh-like fabrics with a large mesh opening width, high structural variability and going beyond the working range Product widths.

a) beim Verfahren der eingangs genannten Art durch die kennzeichnenden Merkmale des Anspruchs 1; und

b) bei der Einrichtung der eingangs genannten Art durch die kennzeichnenden Merkmale des Anspruchs 10.

The task is solved:

a) in the method of the type mentioned by the characterizing features of claim 1; and

b) in the establishment of the type mentioned by the characterizing features of claim 10.

By connecting functional thread sections before the Attach with adjacent mesh leg thread groups for formation calculated from functional thread reserves to loops decisive advantages. Are all functional thread sections too Loops of the same length accumulate, so there is a uniform Net whose width is greater than the width of the facility for the production of the textile fabric, so that for Manufacture of wide networks only much narrower facilities required are. Will the between two adjacent net leg thread groups arranged functional thread sections with manufactured different lengths, so arise also net-like fabrics depending on the location and length of the reserves of the functional thread sections of simple Meshes with rectangular dimensions up to very different ones in particular can also lead to three-dimensional results (see figures 11c to 11f).

Advantageous refinements of the manufacturing method are shown in claims 2 to 9 and the device for performing the Method specified in claims 11 to 15.

Fig. 1

Schematische Darstellung der Verfahrensschritte: Erzeugung von Netzschenkelfadengruppen, Verbindung eines Funktionsfadens mit einer Netzschenkelfadengruppe und Herausführung der Funktionsfäden

Fig. 2

Schematische Darstellung der Verfahrensschritte: Bildung einer Funktionsfadenreserve und Verbindung mit einer Netzschenkelfadengruppe

Fig. 3

Schematische Darstellung des Verfahrensschrittes: Erreichen der Ausgangsstellung

Fig. 4

Nähgewirktes netzartiges textiles Flächengebilde in Herstellungslage

Fig. 5

Nähgewirktes netzartiges textiles Flächengebilde in Gebrauchslage

Fig. 6

Kettengewirktes netzartiges textiles Flächengebilde in Herstellungslage

Fig. 7

Kettengewirktes netzartiges Flächengebilde in Gebrauchslage

Fig. 8

Nähwirkarbeitsstelle

Fig. 9

Fadenreservebildungssystem

Fig. 10

Kettenwirkarbeitsstelle

Fig. 11 a-f

Produktstrukturen

Advantageous exemplary embodiments are described in more detail below with reference to the drawings, which show:

Fig. 1

Schematic representation of the process steps: generation of net leg thread groups, connection of a functional thread with a net leg thread group and removal of the functional threads

Fig. 2

Schematic representation of the procedural steps: formation of a functional thread reserve and connection to a network leg thread group

Fig. 3

Schematic representation of the process step: reaching the starting position

Fig. 4

Sewn, mesh-like textile fabric in the production position

Fig. 5

Sewn, mesh-like textile fabric in use position

Fig. 6

Warp knitted net-like textile fabric in the production position

Fig. 7

Warp knitted net-like fabric in the position of use

Fig. 8

Sewing agency

Fig. 9

Thread reserve formation system

Fig. 10

Warp knitting unit

11 af

Product structures

The method steps according to the invention are shown in FIGS. 1 to 3 Hand schematically represented by a sewing work station. The sewing agency the Netzschenkelfadengruppen 1, consisting of a Sewing thread 2, a standing weft thread 3 and functional threads 4 in known Fed way. Fraying the sewing threads 2 a stable mesh opening leg made of a wale in the direction of processing, the in the process of stitch formation band-shaped standing weft threads 3 and the functional threads 4 are pierced are and the functional thread with the Netzschenkelfadengruppe 1 connected becomes. This formation of the net opening legs in the processing direction can in a known manner by omitting the standing weft threads 3, through the connected number of wales in the mesh leg and with more than one wale in the mesh leg another binding of the sewing threads 2 can be varied.

Fig. 1 shows the point in time during the stitch formation a lateral displacement movement of the functional threads 4 to the left of the Area of the net leg thread group 1 are brought out.

In Fig. 2 it is shown that the underlaying of the functional thread 4 under the adjacent slide needle and the formation of the functional thread reserves by deflecting the functional threads 4 in or against the processing direction, that is, the running direction of the textile network to be produced and the formation of a loop is completed. The Functional thread reserves formed are released and simultaneously tied or tied and so in the neighboring net leg thread group 1 fixed. A functional thread reserve is used during the creation a textile network built in the process of stitch formation and by transferring the textile product from its manufacturing position Loop-shaped that can be lifted into the position of use (spreading) Thread reserve understood in the functional thread system.

Fig. 3 shows the movement in the starting position. Correspondingly the mesh geometry is done again at a suitable time leading the functional threads 4 out of the net leg thread group 1 and forming the functional thread reserve again.

The functional thread can be in a the adjacent net leg thread groups or in the same net leg thread group be connected or integrated. From the functional threads can no or the same across and in the processing direction or different functional thread reserves are formed. The Introduction of the functional threads provided with functional thread reserves in The processing direction can be perpendicular or at an angle to the processing direction done, with an inclusion at right angles in same work cycle and under inclined inclusion in one of the next working cycles is understood.

4 is the inventive according to the sewing knitting method Product shown in the production position and in Fig. 5 in the position of use.

Fig. 4 shows that weft threads 3, sewing and functional threads 2; 4 the Form net leg thread groups and thus in the already described Way the net mesh legs in the processing direction. The alternate tied or integrated in two neighboring net leg thread groups Functional threads form the functional thread reserves. Fig. 5 shows that textile net in the position of use. The functional thread reserves are released, the functional threads are stretched out and thus preferably form Net mesh legs lying at right angles to the direction of processing. It it can be seen that between the first and second network leg thread group 1.1; 1.2 the functional thread 4 in the processing direction by one decreasing amount deflected or not deflected, i.e. different Functional thread reserves formed between the second and third Reticulated thread group 1.2; 1.3 the functional thread for equal amounts deflected, i.e. same functional thread reserves formed and between the third and fourth Netzschenkelfadengruppe 1.3; 1.4 not deflected, i.e. no functional thread reserves are formed. From this Constellation results in a product in the position of use as shown in FIG. 5 shows.

If the product was manufactured using the warp knitting process, the result is the product structure shown in Figs. 6 and 7 in manufacturing and Position of use. The net leg thread groups consist of one Warp thread 18 and two counter-fed functional threads 4 and form in a known manner, the mesh legs in the processing direction, the functional threads in the net leg thread group typical of the warp knitting are connected or tied up by considerations.

It is also possible to connect or integrate the network leg thread group from at least one warp thread and at least one Functional thread or at least one warp thread, at least one standing weft thread and at least one functional thread according to the known crochet gallon process to realize. The connection or integration of the functional thread to the net leg thread group by piercing the functional thread in the stitch formation and by its integration as Partial weft or stitch. It is also possible to connect or integrate to realize by thermal or chemical fixation.

In Fig. 8 is a device for performing the method described shown, the connection of the Netzschenkelfadengruppe and the functional thread 4 by means of a solidification device which is trained as a sewing center, happens. The sewing agency consists of several combined on a needle bar 6, jointly movable slide needles 5, each one Locking wire 7 is assigned from one or more as a laying rail trained thread guides, mostly designed as perforated needles 16 Thread guide elements and - as in the embodiment shown above arranged the slide needles 5, with designed as a laying tube Functional thread guides 8 - of several each between the slider needles 5 arranged tee elements 9, and from a counter-holder rail 10. According to the invention there is at least one sewing station between two transverse needles adjacent to the processing direction 5 functional thread reserve formation system acting on at least one functional thread 4 11 arranged. In the illustrated Execution it consists of several, in a row fixed on two, across to the processing direction across the entire working width of the machine reaching, one above the other, movable perpendicular to their longitudinal axis and additionally attached swiveling bars as hook needles 12 trained elements for functional thread reserve formation. In the filament reserve formation system 11, each bar is a gear train Drive 13, each drive a change control 14 and a pattern controller 15 is assigned to the overall system.

9 shows a further possible embodiment of a functional thread reserve formation system 11, the elements for functional thread reserve formation fixed in a row, in several, across the processing direction arranged in a row next to each other, perpendicular to their Longitudinally movable and additionally pivotable needle bar 6 attached and are designed as hook needles 12. In the filament reserve formation system each needle bar 6 is designed as a transmission Drive 13 with associated change control 14 and the A pattern controller 15 is assigned to the overall system.

In Fig. 10 is a device for performing the method described shown, the connection of Netzschenkelfadengruppe 1 and the functional thread 4 by means of a consolidation device, which is designed as a warp knitting station. The warp knitting unit consists of several on a needle bar 6 summarized, jointly movable knitting needle - here as sliding needles 5 formed with locking wire 7 - from one or more than Laying rail trained thread guides, with trained as perforated needles 16 Thread guide elements for guiding the warp thread 18 and the Functional thread 4, as well as several each between the slider needles 5 combined containment and tee boards arranged on a bar 17. According to the invention is in the warp knitting unit one at least between two adjacent to the processing direction Slider needles 5 acting on at least one functional thread 4 Functional thread reserve formation system 11 arranged. In the illustrated With several in a row, it is fixed on a vertical version attached to their longitudinal axis movable and additionally pivotable bar, elements designed as hook needles 12 for forming the functional thread reserve executed. The functional thread reserve formation system 11 is a drive 13 with an adjustable stroke and this is a change control 14 assigned.

According to the invention, other combinations of arrangements of the active or Sliding needles 5 with functional thread reserve formation systems 11 are possible. Rigid or jointly can also be used as functional thread reserve formation systems and / or displacer elements movable in groups and / or individually, such as sinkers, latch or slide needles, grippers etc. Find.

The mode of operation of the devices according to the invention is described below described.

In FIGS. 1 to 3, the mode of operation is that in FIGS. 8 and 9 Embodiment of a functional thread reserve formation system 11 shown shown schematically. The net thigh thread groups become the sewing unit 1, consisting of the sewing 2, standing weft 3 and functional threads 4 supplied in a known manner. This results from fraying the sewing thread 2 is a stable one consisting of a wale Net opening leg in the processing direction, being in the process the stitch formation, the band-shaped standing weft threads 3 and the functional threads 4 can be pierced by the needles 5. Fig. 1 shows the point in time during the stitch formation by a side Offset movement of the functional thread guides 8, the functional threads 4 led to the left out of the area of the net leg thread group 1 will. The elements designed as hook needles 12 opened downwards for the formation of the functional thread reserve, the functional threads 4, by moving towards the needles 16 and their hook ends at the same time by swiveling the entire bar downwards be folded. The formation of the functional thread reserves must be with the underlaying of the functional thread 4 under the slide needle 5 or completed by piercing the functional thread with the slide needle be. 2 is the backing of the pusher needles 5 and the formation of the functional thread reserves through the return movement the hook needles 12 completed. By swiveling the bar upward, the functional thread reserves are released and at the same time tied or bound by the needles 5 and so in the neighboring Reticulated thread group 1 fixed. Fig. 3 represents the movement of the functional thread reserve formation system 11 in the direction of the needle points to the starting position. According to the mesh geometry is carried out at a suitable time the functional threads 4 from the net leg thread group 1 to the right and a renewed formation of the functional thread reserve by the functional thread reserve formation system 11.

10 is a warp knitting work station with a functional thread reserve formation system according to the invention 11 shown. The side by side the needle bar 6 in a row arranged needles 5 with the their associated closing wires 7 form by means of the perforated needles 16 fed net leg thread group 1 - consisting of the warp threads 18 and the functional threads 4 - with the participation of the combined Inclusion and tee boards 17 in a known manner, the mesh legs in the processing direction.

The functional thread 4 is tied in the mesh leg. According to the invention is in the warp knitting at least between two sliding needles 5 adjacent to the processing direction acting filament reserve formation system 11 arranged. The Functional thread reserve formation system 11 consists of hook needles 12 which are in a row next to each other across the entire width of the Machine reaching, horizontally displaceable and around its longitudinal axis pivotable bar are attached, which is moved by the drive 13 to which a change control 14 is assigned. Corresponding the network geometry becomes the functional thread 4 through the perforated needle 16 led out of the net leg thread group 1, through the horizontal Movement of the bar with the hook needles 12 in the direction of the sliding needles 5 and a simultaneous swiveling movement from top to bottom gripped by the hook needles 12 and by the subsequent return movement of the Barre accumulated to the functional thread reserve. Then the functional thread 4 in the adjacent net leg thread group 1 through the Slider needle 5 tied or integrated and the functional thread reserve by a pivoting movement of the hook needles 12 from the bottom up and a horizontal movement of the same is thrown into the starting position.

At warp knitting or sewing work stations with two needle systems or with knitting needles designed as tongue or point needles or on Warp or sewing workplaces with a round job is the Invention equally applicable.

11 a to f show various methods described producible mesh geometries, which are created by varying the function thread feed, the size of the functional thread reserve and the input or Connection of the functional threads 4 to the mesh stitches can be achieved can. The manufacturing situation is on the left and on the right each shows the position of use of the network.

List of reference symbols

1

Reticulated thread group

1.1

first net leg thread group

1.2

second net leg thread group

1.3

third net leg thread group

1.4

fourth net leg thread group

2nd

Sewing thread

3rd

Standing weft

4th

Functional thread

5

Slide needle

6

Needle bar

7

Locking wire

8th

Functional thread guide

9

Tee element

10th

Bracket rail

11

Functional thread reserve formation system

12th

Hook pin

13

drive

14

Change control

15

Pattern control

16

Perforated needle

17th

Enclosure and tee board

18th

Warp thread

Claims (15)

1. Method of producing net-type textile fabrics from threads, wherein a plurality of mesh side thread groups (1, 1.1, 1.2, 1.3, 1.4) are formed next to one another in the running direction of the fabric being produced, which are connected to one another exclusively by working threads (4) running to and fro between neighbouring mesh side thread groups (1, 1.1, 1.2, 1.3, 1.4), characterised in that, for forming a working thread reserve, at least one connecting working thread portion is sunk to form a loop before being fastened to neighbouring mesh side thread groups (1, 1.1, 1.2, 1.3, 1.4).
2. Method according to claim 1, characterised in that the mesh side thread group (1, 1.1, 1.2, 1.3, 1.4) is formed according to the stitch-bonding method from at least one stitching thread (2) and at least one working thread (4).
3. Method according to claim 1, characterised in that the mesh side thread group (1) is formed according to the warp knitting method from at least one warp thread (18) and at least one working thread (4).
4. Method according to claim 1, characterised in that the mesh side thread group (1) is formed according to the crochet galloon method from at least one warp thread (18) and at least one working thread (4).
5. Method according to claim 1, characterised in that the connection between the mesh side thread group (1) and the working thread (4) is formed by chemical or thermal fixing.
6. Method according to claim 1, characterised in that the working thread portions lying next to one another across the running direction are sunk to form loops of the same length or of different lengths.
7. Method according to claim 1, characterised in that, in relation to the preceding working threads (4), the working thread portions following in the running direction are sunk to form loops of the same length or of different lengths.
8. Method according to claim 1, characterised in that the working threads (4) are joined to the adjacent mesh side thread group (1, 1.1, 1.2, 1.3, 1.4) at right angles across the running direction.
9. Method according to claim 1, characterised in that the working threads (4) are joined to the adjacent mesh side thread group (1, 1.1, 1.2, 1.3, 1.4) offset in the running direction.
10. Apparatus for carrying out the method according to any one of claims 1 to 9, having at least one thread feed for at least one of the following threads: stitching thread, warp thread or standing weft thread, and a plurality of bonding devices located next to one another for the formation of mesh side thread groups oriented in the running direction to produce net mesh sides, and at least one working thread feed for feeding in a working thread passing to and fro between the mesh side thread groups for the formation of net mesh sides oriented across the running direction, the distance between two adjacent bonding devices corresponding to the length of a straight working thread portion lying across the running direction, characterised in that each bonding device is associated with at least one working thread guider (8), which acts on the working thread (4) and bridges the distance between the adjacent bonding devices, and each bonding device is associated with at least one controllable working thread reserve formation system (11), which acts on the working thread (4) between two adjacent bonding devices and is provided with elements (12) for forming the working thread reserve.
11. Apparatus according to claim 10, characterised in that the bonding device is a stitch-bonding work station.
12. Apparatus according to claim 10, characterised in that the bonding device is a warp knitting work station.
13. Apparatus according to claim 10, characterised in that the bonding device is a crochet galloon work station.
14. Apparatus according to claim 10, characterised in that the working thread reserve formation system (11) comprises a drive (13) associated with a change control (14) and/or a pattern control (15), which correlate with the control of the apparatus.
15. Apparatus according to claim 10, characterised in that, for creating different, mutually dependent working thread reserves, the working thread reserve formation system (11) is equipped with elements of different geometric configuration, such as needles, hooks, grippers, displacer elements, sinkers and air-blowing tubes.

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