CN110770379A

CN110770379A - Device and method for feeding thread and textile machine

Info

Publication number: CN110770379A
Application number: CN201880043136.7A
Authority: CN
Inventors: M.韦伯
Original assignee: Hochschule Niederrhein
Current assignee: Hochschule Niederrhein
Priority date: 2017-06-26
Filing date: 2018-06-13
Publication date: 2020-02-07
Anticipated expiration: 2038-06-13
Also published as: EP3645774A1; WO2019001969A1; CN110770379B; DE102017114133A1; EP3645774B1; US20200109498A1

Abstract

The invention relates to a device for feeding threads for a meshed tool arranged in at least one row of a textile machine, comprising a thread guide device having at least one rotary element (4, 5, 20, 21, 30, 31, 40, 41) with at least one thread guide (20 a, 20b, 21a, 21b, 30a, 30b, 40a, 40 b) which is designed to lay threads back and forth in two directions (HI, HR) in the row of the tool over the entire travel range (BG). The thread guide device has at least two rotary elements (4, 5) arranged as a pair, wherein the rotary elements (4, 5, 20, 21, 30, 31, 40, 41) of a pair are arranged eccentrically with respect to one another and on top of one another in the axial direction, and wherein the rotary elements (4, 5) of a pair can be driven in opposite rotational directions (R1, R2). Each rotating element (4, 5, 20, 21, 30, 31, 40, 41) has at least one thread guide (4 a, 4b, 4c, 5a, 4b, 4c, 20a, 20b, 21a, 21b, 30a, 30b, 40a, 40 b) configured as a entraining element for laying the thread in one of the directions (HI, HR).

Description

Device and method for feeding thread and textile machine

Technical Field

The invention relates to a device and a method for feeding a thread for a mesh-forming tool of a textile machine, which is arranged in at least one row, and to a corresponding textile machine.

Background

Textile machines designed as warp knitting machines, in particular raschel warp knitting machines (raschelmashine), are described, for example, in DE 1268305 a. The thread configured as a weft thread is fed at its rear side approximately parallel to the knitting needle row during the mesh forming process by a thread guide of a long weft mechanism (langschusineiderichtung), which can be moved between two reversal points by means of a steering cylinder. At a point in time when the needles are transverse to the knockover position of the needle bank, the weft thread is brought to the front side of the knitting needle bank by the suction mouth.

Since the wire guide must be accelerated and braked between reversal points, the speed at which the wire guide can be moved by means of the actuating cylinder is limited.

DE 1760860C 3 discloses a device for feeding weft threads for warp knitting machines, in particular for raschel knitting machines, in which a thread guide is provided which is guided on a running rail. It is a rotating element configured as a rod, at the end of which a wire guide is arranged. The lever is rotatable in a direction of rotation about an axis oriented perpendicular to its direction of extension. The weft thread is guided from the thread loop to the thread guide through the axis of the rod. In the region of the fabric track edge (Warenbahnkanten), a retaining element is provided around which the weft thread can be placed circumferentially by means of a thread guide. The drive for the holding elements is coordinated with the rotational movement of the lever in such a way that the weft threads do not cross between the holding elements. The holding element simultaneously serves as a guide element for placing the weft thread at the warp thread.

DE 1920477 a discloses a warp knitting machine, in particular a raschel warp knitting machine, with a device for taking in weft threads. The weft thread is laid down outside the needle area by means of a holding unit arranged in the area of the edge of the fabric track and is laid down at the warp thread by means of a guide element. For depositing the weft thread, a plurality of thread guides are provided which are guided on the running rails and which are assigned to the thread guides in each case a thread loop holder which runs synchronously therewith.

Between the thread guide and the structuring needle, a storage element is arranged for accommodating a plurality of weft thread lengths corresponding to the fabric width.

A device for depositing a weft thread on a warp knitting machine is described in DE 2035007 a. The device comprises a thread guide consisting of a tube, which is guided by a running belt via a reversal point in the region of the edge of the fabric track. A storage device is provided which accommodates the respective weft thread length and which moves in the direction of the weaving tool.

A warp knitting machine, in particular a raschel warp knitting machine, for producing a warp knit with a long weft thread by means of a device for the endless supply of a plurality of weft threads is described in DE 2401050. The vehicle places the weft thread in a conveyor belt arranged on both sides, by means of which the weft thread is guided to the weaving tools.

Disclosure of Invention

The object of the invention is to develop a device and a method for feeding thread for a mesh-forming tool of a textile machine and a corresponding textile machine, wherein the thread is fed to the tool at a high speed. In particular, the speed of the back-and-forth laying should be increased.

This object is achieved by the characterizing features of the independent claims.

The device according to the invention for feeding the thread of a meshed tool arranged in at least one row for a textile machine comprises a thread guide device having at least one rotating element with at least one thread guide. The thread guide device is configured for laying back and forth weft threads in both directions in the area of the textile machine upstream of the tool extending over the stroke range.

The wire guide device has at least two rotary elements arranged as a pair, wherein the rotary elements of a pair are arranged on top of one another in the axial direction and can be driven in opposite rotational directions. Each rotating element comprises at least one thread guide configured as a entraining element for laying a weft thread in one of said directions.

In one embodiment, the driver element is designed as a driver blade. The wire guide is constructed as a driver blade to enable simple wire guidance without the expense of a small tube or lug.

So-called reciprocators with oppositely driven rotors are known for winding up a wire into a cross coil. DE 8302278 describes a winding-up machine for winding up a thread onto a coil sleeve by means of a reciprocating device by which the thread is laid back and forth substantially transversely to the stroke direction onto a reciprocating stroke substantially corresponding to the length of the coil. The reciprocating mechanism comprises two rotors which are eccentrically mounted relative to each other and are driven in opposite rotation. Each of the rotors has at least two jib arms, wherein the jib arms of the two rotors run in two closely adjacent rotational planes through which the line runs.

By means of the device according to the invention, the thread is fed (that is to say provided) to the tool and is accommodated as the mesh is formed, in contrast to the rolling-up of the rotating cross-coil.

The thread guide device with at least two rotating thread guides in each direction for the back and forth movement before the mesh-forming tool achieves a significantly higher speed of laying the thread than in the case of the known thread guide devices. This simplifies the supply of thread and thus the overall mechanical expenditure of the textile machine.

A warp knitting machine, by means of which the weft thread is laid back and forth, can achieve speeds of, for example, 1500 meters per minute by means of a thread guide device. This speed is sufficient for certain warp knitting machines, for example for many raschel machines, for feeding weft threads without additional storage devices.

The use of this rapid thread guide device offers new possibilities for applications, for example in the field of the production of nets, reinforced textiles (Verstärkungstextilen), civil engineering textiles (Geotecilien) or laces (Spitzen).

In one embodiment, the thread guide device is configured for feeding the thread over a stroke range of 0.05cm to 100cm, in particular 0.5cm to 50cm, of each pair of rotating elements.

In one embodiment, the device has a supply device which is configured to supply a line laid in a direction to the tool. The supply device is configured, for example, as a gripper extending along the tool.

In one embodiment, the device has a holding mechanism with two holding elements which are arranged in the region of the reversal position of the line in the distance of the stroke range. Each holding element is configured for receiving a wire laid in a direction by the wire guide device.

In one example, the holding mechanism is configured for supplying the held wire to the tool. In an alternative example, a supply device is provided in addition to the holding mechanism.

A wire guide device with two rotating wire guides for one direction each of the back and forth movements achieves an adjustment of the phase shift between the two wire guides.

When the two rotating elements rotate in opposite directions at the same rotational speed, the angle between the starting position of the first wire guide of the upper rotating element of a pair (which first wire guide lays the wire past in one of the directions) and the starting position of the second wire guide of the lower rotating element (which second wire guide lays the wire back (comes) in one direction) that receives the wire is called a constant phase shift. The varying phase shift is established by the different rotational speeds of the rotating elements of a pair.

In one example with a pair of two rotating elements, each rotating element has a wire guide configured as a driver blade. Each wire guide is configured for laying the wire in one direction over a range of travel with a half rotation (that is to say a rotation of 180 °). In the case of a phase shift of 0 ° of the two wire guides of the rotary element driven in opposite directions of rotation, that is to say in the same starting position, the wire is laid back and forth alternately by one or the other wire guide.

In an alternative to this example, each wire guide is configured for laying a wire in one direction over a range of travel with a quarter turn (that is, a turn of 90 °). In the case of a 180 ° phase shift of the two wire guides of the rotary element driven in opposite rotational directions, the wire is laid over in one of the directions by one of the wire guides, is held in the wire reversal position, is laid over in the other of the directions by the other of the wire guides and is held again in the wire reversal position. The thread is held, for example, in the supply device or at a thread reversal position by a holding mechanism.

In one embodiment, the rotary element has at least two wire guides, respectively. Upon rotation of the respective rotary element, the thread can be laid twice in the direction depending thereon, for example in the case of two thread guides of the rotary element.

In one embodiment, the wire guides of the rotating element, which are configured as driving wings, for example, are arranged evenly distributed over the circumference.

In the alternative, the wire guides are not distributed uniformly at the periphery.

In one embodiment, the wire guide device has a number of pairs with two rotating elements each. The pairs are arranged alongside one another. The wire guide device is configured for laying the wire by each pair over a travel range corresponding to the entire travel range divided by the number of pairs. Here, the thread to be laid in one direction is delivered from one pair of rotating elements to the next. The structural dimensions of the rotor become larger with increasing stroke range and collide with the boundaries of the space available in the textile machine. In the case of a plurality of pairs of modules alongside one another, the structural dimensions can be reduced or the stroke width can be increased. In the case of an assembly of a plurality of pairs of rotary elements, a full range of travel up to about 600cm is possible.

The textile machine according to the invention with at least one row of tools forming a mesh has in each case one of the arrangements described above for each row of tools.

Textile machines with tools forming meshes arranged in at least one row are, for example, warp knitting machines, i.e. warp knitting robots, raschel warp knitting machines and hook-knit belt machines (Häkelgalon maschen), as well as stitch-bonding machines (Nähnwirkmaschen) and flat knitting machines (flachtstickmaschen).

When feeding the threads of the tool for forming the mesh, the threads laid at least in one direction are placed before, after or on the tool.

The features and advantages of the method claims are substantially in accordance with the features and advantages of the corresponding apparatus claims.

Drawings

The invention is further elucidated by means of examples schematically shown in the drawings. The illustrated example relates to a textile machine according to the invention, which is designed as a warp knitting machine, with a device according to the invention for feeding thread for the textile machine, i.e. is designed for feeding weft thread for a warp knitting machine.

Figure 1 shows a representation of the principle of a warp knit with weft;

fig. 2a shows a schematic and perspective illustration of a pair of rotating elements of a first device according to the invention for feeding a wire in a first position;

FIG. 2b shows a schematic illustration corresponding to FIG. 2a in a second position;

fig. 3 shows a schematic representation of a textile machine according to the invention, configured as a warp knitting machine, with a device according to a first example of the invention;

figure 4 shows a representation of the principle of a further warp knit with weft threads; and

fig. 5 shows a schematic representation of three pairs of rotary elements of a second device according to the invention for feeding lines.

Detailed Description

First example

In a first example, the textile machine is a warp knitting machine with a device for feeding a thread configured as a weft thread before tools configured as knitting tools arranged in rows.

In fig. 1, a narrow band section of a warp knit is schematically shown, which warp knit can be produced by a warp knitting machine. The warp knitting machine is constructed, for example, as an RL raschel warp knitting machine with a row of knitting tools, where RL denotes the left and right mesh sequence. In the example shown, the warp knit is made of five warp threads 1 forming a mesh and one weft thread 2. Fig. 1 shows a cut row of cells and four complete rows of cells with three weft reversal positions 3.

The device for feeding weft thread for a weaving tool has a thread guide device. Fig. 2a and 2b show the principle of the wire guide device by means of a perspective illustration. Which is configured for laying back and forth weft threads 2 in two directions HI, HR in the area in front of the weaving tools of the warp knitting machine, which extend over the entire stroke range B indicated in fig. 2B.

The wire guide device has two

rotating elements

4, 5 arranged as a pair. The

turning elements

4, 5 are arranged in front of the rows of knitting tools, wherein the knockover bars 6 and the five latch needles 7 of the knitting tools of the warp knitting machine can be seen in fig. 2a, 2 b. The

rotating elements

4, 5 of a pair are arranged on top of each other in the direction of their common axis of rotation D (which is drawn in fig. 3). The pair of

rotary elements

4, 5 can be driven in opposite rotational directions R1, R2. The rotating element 4 is arranged above the rotating element 5 in the example shown in fig. 2a, 2 b. In this example, the axes of rotation of the two

rotary elements

4, 5 run parallel to the direction of movement RZ of the latch needles 7 and thus perpendicular to the rows of the knitting tool.

Each

rotating element

4, 5 has three

thread guides

4a, 4b, 4c, 5a, 5b, 5c configured as driving wings for laying the weft thread 2 in one of said directions HI, HR.

In the first position shown in fig. 2a, the warp thread 1 coming from above in fig. 2a and 2b is guided around the latch needle 7 over the tongue 7a of the latch needle 7 for the formation of the next mesh. The warp threads 1 accordingly form a mesh under the tongue 7a of the latch needle 7, in which mesh the knitted section 2G of the weft threads 2 running from left to right in fig. 2a is already accommodated. In fig. 2a, the weft thread 2 is laid starting from the weft reversal position 3 in the direction HI by the thread guide 4a of the rotary element 4 before the two latch needles 7.

Fig. 2b shows the delivery of the weft thread 2 from the thread guide 4a of the upper turning element 4 to the thread guide 5a of the lower turning element 5. The latch needle is in the knockover position (Abschlagposition).

Fig. 3 shows the warp knitting machine not to scale and schematically (i.e. by means of a schematic vertical cross section) with a device for feeding the weft thread 2 before the knitting tool. The thread guide device with the

turning elements

4 and 5 is arranged before the knitting tool 7 of the knitting machine. The positions of the

turning elements

4, 5 correspond to the positions of fig. 2 a.

One of the latch needles 7, one of the knockover flat bars 6, one of the eye needles 8 and one of the warp threads 1 are shown by a knitting tool. The warp thread 1 is guided to the latch needle 7 by the hole needle 8. From the loop 9, the weft thread 2 is guided to the guide 4a of the turning element 4, by means of which it is laid under the tongue 7a before the latch needle 7.

The

rotating elements

4, 5 of a pair are arranged in such a way that the running

thread guides

4a, 4b, 4c, 5a, 5b, 5c intersect the thread course of the weft thread 2 from the stitch 9 to the weaving tool.

The warp knitting machine is illustrated by the rear side wall 10 and the base 11. The warp knitting machine has a roller pair 12 and a winding tree 13 (Aufwickelbaum) for drawing out a warp knit KG produced behind the knitting tool (on the left in fig. 3) in a drawing-out direction P.

In operation, the weft thread 1 is laid back and forth in both directions HI, HR by the thread guide device in the region of the warp knitting machine upstream of the knitting tool extending over the entire stroke width B.

The

rotating elements

4, 5 of the wire guide device, which are arranged as a pair, are driven above each other in the axial direction and in opposite rotational directions R1, R2. The weft thread 2 is laid by the thread guides 4a, 4b, 4c, 5a, 5b, 5c of the

turning elements

4, 5 configured as driving wings in one of the directions HI, HR, respectively. That is, by means of the running

thread guides

4a, 4b, 4c, 5a, 5b, 5c of the pair of

rotating elements

4, 5, the weft thread 2 is taken up, laid back and forth and thus fed to the weaving tool in the thread course of the weft thread 2 from the stitch 9 to the weaving tool.

The weft thread 2 is laid in the direction HI (from right to left in fig. 2a, 2 b) by the thread guides 4a, 4b, 4c of the turning element 4 and in the direction HR (from left to right in fig. 2a, 2 b) by the thread guides 5a, 5b, 5c of the turning element 5. The weft thread 2 is guided here alternately by

thread guides

4a, 4b, 4c of the turning element 4 and by

thread guides

5a, 5b, 5c of the turning element 5. In this connection, as shown in fig. 2b, for example, the weft thread 2 is received by the thread guide 4a via the thread guide 5 b.

In an alternative example, the axes of rotation of the two rotating elements run at an acute angle with respect to the direction of movement RZ of the latch needle 7.

In an alternative example, the two rotating elements of a pair are arranged eccentrically parallel to the rows of the knitting tool.

In an alternative example, the warp knitting machine is configured as an RR raschel warp knitting machine with two rows of knitting tools. For each of these two rows, the warp knitting machine has means for feeding weft thread.

Second example

The second example corresponds to the first example except for the features described below.

In fig. 4, a section of a narrow band of a warp knit KG is schematically shown. In the example shown, the warp knit KG is produced from nine warp threads 1 forming a mesh and one weft thread 2. Fig. 1 shows one cut row of cells and nine full rows of cells. The weft thread 2 is guided around all the meshes of a row in the upper five mesh rows with five weft-reversal positions 3. In the lower four mesh rows, the weft threads 2 are guided through only a part of the mesh, i.e. through four mesh openings, wherein two inner weft-reversing positions 3i are formed in addition to the other outer weft-reversing positions 3.

Fig. 5 shows the principle of the wire guide device of the second example. The thread guide device comprises a number N of three pairs each having two

rotary elements

20, 21, 30, 31, 40, 41 each having two

thread guides

20a, 20b, 21a, 21b, 30a, 30b, 31a, 31b, 40a, 40b, 41a, 41b which are designed as entraining wings. The three pairs are arranged alongside one another along the entire travel range BG. Each pair being configured for laying a weft thread onto a partial stroke range BT. The travel range BT corresponds to the entire travel range BG divided by the number of pairs N, that is to say divided by 3.

The range of travel BT of the pair of

rotating elements

20, 21, 30, 31, 40, 41 is 3cm in this example. The entire travel range BG is, for example, 9 cm.

During operation, the weft thread 2 is laid onto the travel range BT by one of the three pairs of two

rotating elements

20, 21, 30, 31, 40, 41, corresponding to the entire travel range BG divided by the number N of pairs. This is illustrated for the upper five mesh rows of the warp knit KG shown in fig. 4.

In the lower four mesh rows of the warp knit KG shown in fig. 4, the weft threads 2 are laid onto the right three meshes by the right pair of

rotating elements

20, 21 and onto the meshes by the middle pair of

rotating elements

30, 31.

In the alternative, the range of travel of the pair of rotating elements is 0.5cm to 50 cm.

In an alternative to a warp knit, a plurality of positions of the weft are provided.

In this case, a plurality of weft threads are laid back and forth simultaneously by a plurality of pairs of rotating elements of the thread guide device and fed onto the knitting tool on top of one another.

Such warp knitted articles can be used in lightweight construction, for example for composite structures in wind wheels or in motor vehicles.

List of reference numerals

1 warp of yarn

2 weft

2G knitted segment

2S coil section

3 opposite weft position

4 rotating element

4a-4c wire guide

5 rotating element

5a-5c wire guide

6 knocking-over flat bar

7 latch needle

7a tongue

8-hole needle

9 coil

10 side wall

11 base

12 roller pair

13 winding tree

20. 21 rotating element

20a, 20b, 21a, 21b wire guide

30. 31 rotating element

30a, 30b, 31a, 31b wire guide

40. 41 rotating element

40a, 40b, 41a, 41b wire guides

Range of stroke B

In the RZ direction

R1 direction of rotation

R2 direction of rotation

HI direction

HR direction

P direction of extraction

KG warp knit

BG Range of full travel

BT pair of travel ranges.

Claims

1. Device for feeding a thread for a meshed tool arranged in at least one row of a textile machine,

with a wire guide device having at least one rotating element (4, 5, 20, 21, 30, 31, 40, 41),

with at least one wire guide (4 a, 4b, 4c, 5a, 5b, 5c, 20a, 20b, 21a, 21b, 30a, 30b, 40a, 40 b),

wherein the thread guide device is configured for laying a thread back and forth in two directions (HI, HR) in the entire travel range (B) in front of the rows of tools, respectively,

the thread guide device has at least two rotating elements (4, 5, 20, 21, 30, 31, 40, 41) arranged as pairs, wherein the rotating elements (4, 5, 20, 21, 30, 31, 40, 41) of a pair are arranged on top of one another in the axial direction and can be driven in opposite rotational directions (R1, R2),

wherein each rotating element (4, 5, 20, 21, 30, 31, 40, 41) has at least one thread guide (4 a, 4b, 4c, 5a, 4b, 4c, 20a, 20b, 21a, 21b, 30a, 30b, 40a, 40 b) configured as a entraining element for laying the thread (2) in one of the directions (HI, HR).

2. Device according to claim 1, characterized by a supply device configured for supplying the line laid in one direction (HI, HR) to the tool.

3. The device according to claim 1 or 2, characterized by a holding mechanism with two holding elements which are arranged in the region of the wire reversal position in the interval of the entire travel range (B, BG), wherein the holding mechanism is configured for accommodating a wire laid by the wire guide device in one direction (HI, HR) and supplying it to the tool.

4. Device according to claim 1 or 2, characterized in that the turning element (4, 5, 20, 21, 30, 31, 40, 41) has at least two wire guides (4 a, 4b, 4c, 5a, 5b, 5c, 20a, 20b, 21a, 21b, 30a, 30b, 40a, 40 b).

5. Device according to claim 1, characterized in that the wire guide device has a number (N) of pairs with respectively two rotating elements (20, 21, 30, 31, 40, 41), wherein the pairs are arranged alongside one another and each pair lays the wire onto a travel range (BT) corresponding to the entire travel range (BG) divided by the number (N) of pairs.

6. Textile machine with at least one row of tools forming a mesh, characterized by a device for each row of tools according to any of claims 1 to 5, respectively.

7. Method for feeding a thread for a meshed tool arranged in at least one row of a textile machine,

with a thread guide device having at least one rotary element (4, 5, 20, 21, 30, 31, 40, 41) with at least one thread guide (4 a, 4b, 4c, 5a, 5b, 5c, 20a, 20b, 21a, 21b, 30a, 30b, 40a, 40 b),

wherein a thread is laid back and forth in two directions (HI, HR) in the entire travel range (B) in front of the rows of tools respectively by means of the thread guide device,

it is characterized in that the preparation method is characterized in that,

at least two rotating elements (4, 5, 20, 21, 30, 31, 40, 41) of the thread guide device, which are arranged on top of one another in the axial direction and are arranged as pairs, are driven in opposite rotational directions (R1, R2),

wherein the thread is laid in one of the directions (HI, HR) by means of a rotary element (4, 5, 20, 21, 30, 31, 40, 41) each having at least one thread guide (4 a, 4b, 4c, 5a, 5b, 5c, 20a, 20b, 21a, 21b, 30a, 30b, 40a, 40 b) configured as a entraining element.

8. Method according to claim 7, characterized in that the line laid in one direction (HI, HR) is supplied to the tool by a supply device.

9. Method according to claim 7 or 8, characterized in that the threads respectively laid in one direction (HI, HR) are received and supplied to the tool by means of two holding means which are arranged in the region of the reversal position of the threads in the pitch of the entire travel range (B, BG).

10. Method according to any one of claims 7 to 9, characterized in that the wire is laid onto a travel range (BT) corresponding to the entire travel range (BG) divided by the number (N) of pairs of a number (N) of the wire guide devices, respectively, with two rotating elements (20, 21, 30, 31, 40, 41) arranged side by side with respect to each other.