warp knitting machine

Abstract

A warp knitting machine (1) is described which has a needle bed (2) carrying needles (3), a group of guide bars (4) movable in a deflection direction with weft bars (6) for laying weft threads, and a fabric take-off device (18). It is desired to be flexible when manufacturing a web by means of a warp knitting machine. To this end, at least one guide sinker (13) is arranged to project through a space between two needles (3), wherein the weft bar (5) supplies a weft thread on the guide sinker (13) when the weft bar (5) is moved between the two needles (3).

Description

Technical Field

[0001] The present invention relates to a warp knitting machine comprising: a needle bed (Wirknadelbarre) that carries knitting needles; a guide bar assembly movable in an offset direction having a weft guide bar for laying weft yarns (Schutzfaden); and a fabric take-up device (Warenabzug). Background Technology

[0002] For example, such a warp knitting machine is known from DE 298 25 132 U1.

[0003] Such warp knitting machines are especially used for manufacturing nets, such as hay bale nets, shade nets, or hail protection nets.

[0004] Here, the comb assembly creates rows of loops (Maschenreihen) (generally in a chain-like form) arranged at intervals between each other, connected by the weft yarns laid by the weft comb. Because the fabric thus constructed is continuously wound, the weft yarns do not extend perfectly perpendicular to the chain yarns but rather diagonally, for example. This causes the fabric width to decrease when it is loaded with tension in the longitudinal direction.

[0005] As is known from DE 298 25 132 U1 above, the length of the weft yarn is extended in such a way that the corrugated needle bed is fixed at the needle bed seat. However, this increases the quality of the needle bed seat and thus limits the operating speed of the warp knitting machine. Summary of the Invention

[0006] The purpose of this invention is to provide flexibility in the manufacturing of the mesh.

[0007] This objective is achieved in a type of warp knitting machine previously mentioned, wherein at least one guide sinker extends through the space between two needles, wherein the weft yarn is guided on the guide sinker as the weft guide bar moves between the two needles.

[0008] When the guide bar assembly produces a chain layup (Fransenlegung), the guide drop extends the section of weft yarn between two chain yarns, or when the guide bar assembly produces another layup, such as a knit layup, it extends the two yarns involved in the loop formation. Because the guide drop extends through the space between two needles, it protrudes beyond the needles, thus forcing the weft yarn to travel a distance greater than the distance between the two needles. Due to this length reserve, the woven web can be widened when it is pulled in width. However, the guide drop is independent of the needle arrangement, so it does not interfere with the movement of the needles and does not contribute to the quality improvement of the needle bed. Usually, more than one guide drop is used. It is also advantageous to arrange at least one guide drop in all gaps between the needles, thereby achieving weft extension between all chain yarns. However, it is also feasible to arrange guide drop in only every other one or every other two gaps between the needles.

[0009] Preferably, the guide sinkers are arranged on the guide sinker bed. When multiple guide sinkers are used, all guide sinkers are operated uniformly. The guide sinker bed can be arranged independently of other beds in the warp knitting machine. It does not need to be moved during the loop-forming process, thus keeping the structure of the warp knitting machine simple. The guide sinkers are arranged in a divided manner on the guide sinker bed. The spacing of the guide sinkers in the offset direction is thus adapted to the distribution of the needles.

[0010] Preferably, the guide sinker bed can be adjusted laterally in the offset direction. This adjustment allows the length of the guide sinkers protruding between the needles to be shortened or lengthened. This enables a simple change in the length of the weft yarns between the individual chain stitches. This adjustment can be made when setting up the warp knitting machine. However, it can also be made during the manufacture of the knitted fabric. This allows for the creation of sections with weft yarns of varying lengths within the knitted fabric. This adjustment can be achieved, for example, via a central adjustment.

[0011] Preferably, the guide sinker bed is connected to an adjustment drive. The adjustment drive allows for adjustment of the position of the guide sinker bed without operator intervention. The operation of the warp knitting machine can be automated to a certain extent.

[0012] Preferably, each knitting needle is associated with two guide sinkers, which are arranged on either side of the knitting needle. This allows for a particularly large extension of the weft yarn. As the weft yarn is guided from one knitting needle to an adjacent needle, it must extend over the two guide sinkers, which protrude beyond the needle. In short, this results in a rectangular guide for the weft yarn, which constitutes a larger reserve.

[0013] Preferably, there is no guide sinker in at least one gap between the knitting needles. Then one or more guide sinkers can be arranged such that the guide sinkers are always only in every other or every two gaps between the knitting needles.

[0014] Preferably, each guide sinker has a first segment extending transversely to the offset direction in a first direction and a second segment extending in the take-up direction of the fabric take-up device. In short, the first segment thereby defines the distance between the second segment and the knitting needle and thus defines the additional length of the weft yarn. As the fabric is taken up by the fabric take-up device, the weft yarn slides onto the second segment in the direction toward the fabric take-up device.

[0015] Preferably, the first segment and the second segment are connected to each other by an arc-shaped segment. On the arc-shaped segment, the weft yarn can slide smoothly in the direction toward the fabric take-up device.

[0016] Preferably, the second section is longer than the first section. Therefore, the weft yarn can be held in the second section for a relatively longer period of time.

[0017] Preferably, the guide sinker has a length at which the weft yarn is placed on the guide sinker at least until the second unwinding. The weft yarn is thus held on the guide sinker for such a long time that it is correspondingly joined to the chain yarn at its two ends. The length of the guide sinker is here primarily defined by the second section. The length depends in particular on the speed of the fabric take-up device and the movement of the weft bed. Attached Figure Description

[0018] The present invention will be described below with reference to preferred embodiments and the accompanying drawings. Wherein:

[0019] Figure 1 The side view shows a schematic view of the height of the knitting area of ​​the warp knitting machine.

[0020] Figure 2 The previous view showed a schematic view of the height of the weaving area.

[0021] Figure 3 Showing the relative positions of the woven areas Figure 1 One implementation of the transformation, and

[0022] Figure 4 Showing relative Figure 2 One form of transformation. Detailed Implementation

[0023] exist Figure 1The warp knitting machine 1, schematically shown, has a needle bed 2 that carries knitting needles 3, which may also be referred to as "working needles". Additionally, a guide bar assembly 4 is provided, which has a weft guide bar 5 and one or more other guide bars 6. The weft guide bar 5 is equipped with a yarn guide 7, which guides the weft yarn during the fabric knitting process. The remaining guide bars 6 are equipped with yarn guides 8, which, together with the knitting needles 3, form a chain. The yarn guides 7 of the weft guide bar 5 then guide the weft yarn back and forth between the various chain yarns. Laying out a type other than "chain" is also possible, as long as a yarn-like structure is obtained. The concept of "chain" is chosen here for simplicity.

[0024] In addition, the warp knitting machine 1 has a fraesblech bed 9 with a fraesblech 10. For example, in Figure 2 As can be identified, the decoupling comb 10 has decoupling comb teeth 11.

[0025] When manufacturing the web, the needles 3 are arranged, for example, at an E1 interval, meaning one needle 3 is arranged per inch of width (2.54 mm). The yarn guides 7 and 8 are arranged accordingly. However, it is also possible to choose other finenesses, such as E6 or E12, in which six or twelve needles 3 and a corresponding number of yarn guides 7 and 8 are arranged per inch (2.54 mm). It is also possible to arrange the needles at other intervals, such as one needle every two inches (50.8 mm) and a corresponding number of yarn guides.

[0026] Guide sinkers 12 and 13 are arranged on both sides of each knitting needle 3, and are positioned at a guide sinker bed 14. The guide sinker bed 14 can be adjusted in the direction of the double arrow 15. An adjustment actuator (not shown in detail) can be provided for this adjustment, allowing the position of the guide sinker bed 14 to be adjusted even without operator intervention. The guide sinker bed 14 does not need to be moved for loop formation, but adjustment is possible during warp knitting machine operation.

[0027] Each knitting needle 3 is associated with two guide sinkers 12, 13, which are arranged on both sides of the knitting needle 3. Here, the two guide sinkers are arranged relatively close to the corresponding associated knitting needle 3 and thus perform the function of holding sinker seats, that is, they can prevent the loop from rising on the bar of the knitting needle 3 when the knitting needle 3 rises.

[0028] Guide settling plates 12 and 13 are correspondingly arranged at the same positions as the uncoiling comb teeth 11. Preferably, the guide settling plates 12 and 13 have the same width as the uncoiling comb teeth 11, that is, they extend in the same direction of offset. Correspondingly, in Figure 2 The dotted lines in the middle show the teeth 11 of the comb plate that are covered by the guide settling plates 12 and 13.

[0029] The unwinding comb plate 10 is arranged with its unwinding comb plate teeth 11 between the guide sinker plates 12, 13 and the needle bed 2.

[0030] exist Figure 1 Only the guide sinker 13 can be identified because the other guide sinkers 12 associated with the same needle 3 are covered by the guide sinker 13.

[0031] The guide sinker 13 (and similarly the guide sinker 12) has a first section 16 that extends transversely to the offset direction in a first direction. Furthermore, the guide sinker 13 has a second section 17 that extends toward the fabric take-up device 18, onto which the resulting fabric is wound. The first section 16 and the second section 17 are connected to each other by an arcuate section 19. Figure 1 As shown below, the second segment 17 extends perpendicularly to the first segment 16. This is not absolutely mandatory. Other angles are possible.

[0032] Figure 2 A warp knitting machine with a single loop guide bar 6 is shown. When manufacturing woven fabric using this machine, the yarn guide 8, together with the knitting needles 3, produces chain or chain yarn. The connection between adjacent chain yarns is then achieved by the weft yarn, which is guided by the weft yarn guide 7 at the weft yarn guide bar 5. The weft yarn guide 7 guides the weft yarn from the knitting needle 3 to the adjacent knitting needle 3 and back to the first knitting needle 3. Here, the weft yarn is correspondingly connected to the chain yarn.

[0033] When the weft guide 7 guides the weft yarn from the... Figure 2 The needle 3 shown on the right is guided to the center. Figure 2 When the knitting needle 3 is shown on the left, the weft yarn is first guided on the guide sinker 12, then between guide sinkers 12 and 13, and finally on guide sinker 13 to the knitting needle 3 on the left. During this movement of the weft yarn, the knitted fabric is wound up by the fabric take-up device 18 and thus continues to be transported. The second section 17 of the guide sinkers 12, 13 is constructed so long that the weft yarn can be on the guide sinkers 12, 13 until it is joined to the chain yarn at both ends.

[0034] In short, the length of the first section 16 defines the excess of the weft yarn, which is the length of the weft yarn that is extra between the two chain yarns.

[0035] Because the guide sinker bed 14 can be adjusted laterally in the offset direction, the first section 16 of the guide sinkers 12, 13 can be adjusted to protrude beyond the knitting needle 3. The length of the weft yarn surplus can also be adjusted accordingly. The guide sinker bed 14 can be adjusted, for example, via a central adjustment. This adjustment can also be performed during the production of the knitted fabric, thereby resulting in areas of different weft yarn lengths in either the longitudinal or take-up direction.

[0036] The offset direction is the direction along which the combs 5 and 6 of the comb assembly 4 move to form loops. Here, the offset direction corresponds to the longitudinal extension of the comb assembly (relative to...). Figure 1 That is, perpendicular to the plane of the drawing.

[0037] Figure 3 and Figure 4 With Figure 1 and Figure 2 The same illustration shows a modified implementation of the warp knitting machine 1. (The last sentence appears to be incomplete and possibly contains errors.) Figure 1 and Figure 2 The same elements are labeled with the same reference numerals.

[0038] According to Figure 1 and Figure 2 The warp knitting machine 1 contains a single loop guide bar 6, which can produce chain laying, while according to Figure 3 and Figure 4 The design incorporates two looping guides 6 and 6' with corresponding yarn guides 8 and 8', which are used to create a knitted layout. This forms a self-stabilizing loop system to which the weft yarn can be stably connected.

[0039] Two or more guide bars 6, 6' can also be used in a warp knitting machine, wherein the knitting area of ​​the warp knitting machine corresponds to that in Figure 2 The woven area shown in the diagram.

[0040] relatively Figure 2 The arrangement of the guide sinkers 12 and 13 also changes. Two guide sinkers 12 and 13 are arranged in one gap between two knitting needles 3, while there are no guide sinkers 12 and 13 in the other gap between two knitting needles. In other words, two knitting needles 3 can also exist between two adjacent guide sinkers 12 and 13 according to the division.

Claims

1. A warp knitting machine (1) comprising: a needle bed (2) for carrying the knitting needles (3); a guide bar assembly (4) movable in an offset direction having a weft guide bar (5) for laying weft yarns; and a fabric take-up device (18), characterized in that, At least one guide sinker (12, 13) extends through the space between two knitting needles (3), wherein the weft guide bar (5) guides the weft yarn on the guide sinker (12, 13) as it moves between the two knitting needles (3), wherein the guide sinker (12, 13) is arranged at a guide sinker bed (14), and wherein the guide sinker bed (14) is not moved during the looping process.

2. The warp knitting machine according to claim 1, characterized in that, The guide settling plate bed (14) can be adjusted laterally in the offset direction.

3. The warp knitting machine according to claim 2, characterized in that, The guide settling plate bed (14) is connected to the adjustment drive.

4. The warp knitting machine according to any one of claims 1 to 3, characterized in that, Each knitting needle (3) is associated with two guide sinkers (12, 13), wherein the two guide sinkers (12, 13) are arranged on both sides of the knitting needle (3).

5. The warp knitting machine according to any one of claims 1 to 3, characterized in that, There is no guide sinker (12, 13) in at least one gap between the knitting needles (3).

6. The warp knitting machine according to any one of claims 1 to 3, characterized in that, Each guide settling plate (12, 13) has a first section (16) extending transversely to the offset direction in a first direction and a second section (17) extending in the winding direction of the fabric winding device (18).

7. The warp knitting machine according to claim 6, characterized in that, The first segment (16) and the second segment (17) are connected to each other by an arc segment (19).

8. The warp knitting machine according to claim 6, characterized in that, The second segment (17) is longer than the first segment (16).

9. The warp knitting machine according to any one of claims 1 to 3, characterized in that, The guide sinker (12, 13) has a length at which the weft yarn is placed on the guide sinker (12, 13) until the second unwinding, during which the weft yarn is correspondingly connected at its two ends to the laying with a yarn-like structure.

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