CN-115897044-B - Warp knitting machine

Abstract

A warp knitting machine (1) is described, with a needle bed (2) carrying needles (3), a guide bar assembly (4) movable in an offset direction, having a weft bar (6) for laying weft yarns, and a fabric take-up device (18). It is desirable to be flexible in the manufacture of webs by warp knitting machines. For this purpose, it is provided that at least one guide sinker (13) protrudes through the space between the two needles (3), wherein the weft thread bar (5) supplies weft thread on the guide sinker (13) when moving between the two needles (3).

Inventors

• M. OTT

Assignees

• 卡尔迈耶斯托尔研发有限公司

Dates

Publication Date

20260508

Application Date

20220309

Priority Date

20210930

Claims (9)

1. 1. Warp knitting machine (1) with a needle bed (2) carrying the needles (3), a guide bar assembly (4) movable in an offset direction with a weft yarn guide bar (5) for laying weft yarns, and a fabric take-up device (18), characterized in that at least one guide sinker (12, 13) protrudes through the space between two needles (3), wherein the weft yarn guide bar (5) guides weft yarns on the guide sinker (12, 13) when moving between two 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. 2. Warp knitting machine as claimed in claim 1, characterized in that the guide sinker bed (14) is adjustable transversely to the offset direction.
3. 3. Warp knitting machine as claimed in claim 2, characterized in that the guiding sinker bed (14) is connected with an adjustment drive.
4. 4. A warp knitting machine as claimed in any one of claims 1 to 3, characterized in that two guiding sinkers (12, 13) are associated with each knitting needle (3), wherein the two guiding sinkers (12, 13) are arranged on both sides of the knitting needle (3).
5. 5. A warp knitting machine as claimed in any one of claims 1 to 3, characterized in that at least one gap between the knitting needles (3) is free of guiding sinkers (12, 13).
6. 6. A warp knitting machine as claimed in any of claims 1 to 3, characterized in that each guiding sinker (12, 13) has a first section (16) extending in a first direction transversely to the offset direction and a second section (17) extending in the take-up direction of the fabric take-up device (18).
7. 7. Warp knitting machine according to claim 6, characterized in that the first section (16) and the second section (17) are connected to each other by means of an arc-shaped section (19).
8. 8. Warp knitting machine according to claim 6, characterized in that the second section (17) is longer than the first section (16).
9. 9. A warp knitting machine as claimed in any one of claims 1 to 3, characterized in that the guide sinkers (12, 13) have a length at which the weft thread is placed on the guide sinkers (12, 13) up to a second knockover, at which the weft thread is correspondingly joined at its two ends into a lay with a yarn-like configuration.

Description

Warp knitting machine Technical Field The invention relates to a warp knitting machine with a needle bed (Wirknadelbarre) carrying needles, a guide bar assembly movable in an offset direction with a weft bar for laying weft threads (Schutzfaden), and a fabric take-up device (Warenabzug). Background Such a warp knitting machine is known, for example, from DE 298 25 U1. Such warp knitting machines are used in particular for the production of nets, such as hay bales, light-screening or hail-suppression nets. The bar assembly produces courses (MASCHENREIHEN) (generally in the form of a knitting chain) arranged at a distance from one another, which are connected by the weft thread laid by the weft bar. Because the fabric thus constructed is continuously wound up, the weft yarns do not run exactly perpendicular to the chaining yarns but extend, for example, diagonally. This causes a reduction in the width of the fabric when it is loaded with tension in the machine direction. It is known from DE 298,132 U1 described above to lengthen the length of the weft yarn 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. Disclosure of Invention The aim of the invention is to be flexible in the manufacture of a net. This object is achieved in a warp knitting machine of the type mentioned in the introduction in that at least one guide sinker (Fuehrungsplatine) protrudes through the space between the two needles, wherein the weft thread bar guides the weft thread on the guide sinker when moving between the two needles. The guide sinkers are directed to lengthen the section of weft yarn between two knitting yarns when the bar assembly produces a knitting chain lay (Fransenlegung) or to lengthen the two yarns involved in looping when the bar assembly produces another lay, such as a knitting lay. Since the guiding sinker protrudes through the space between the two needles, it protrudes beyond the needles, forcing the weft yarn to pass through a stroke greater than the spacing between the two needles. Due to this length reserve, the woven mesh can be widened afterwards when it is pulled in width. However, the guiding sinker is arranged independently of the knitting needle, so that it does not interfere with the movement of the knitting needle and does not contribute to the improvement of the quality of the needle bed. More than one guide sinker is usually used. It is also advantageous to arrange at least one guiding sinker in all the gaps between the needles, so that extension of the weft yarn can be achieved between all the chaining yarns. However, it is also possible to arrange guide sinkers only in every other or every second gap between the needles. Preferably, the guide sinker is arranged at the guide sinker bed. When a plurality of guide sinkers are used, then all guide sinkers are handled in unison. The guiding sinker bed may be arranged independently of other beds in the warp knitting machine. Which does not have to be moved during the looping process, so that the structure of the warp knitting machine can be kept simple. The guide sinker is arranged at the guide sinker bed according to the division. The distance of the guide sinker in the direction of displacement is then adapted to the distribution of the knitting needles. Preferably, the guide sinker bed is adjustable transversely to the offset direction. By such adjustment, the length of the guiding sinker protruding between the knitting needles can be shortened or lengthened. The length of the weft yarn between the individual chaining yarns can thereby be varied in a simple manner. This adjustment can be achieved when setting up the warp knitting machine. However, this adjustment can also be effected during the manufacture of the braid. It is thereby possible to produce sections with weft yarns of different lengths in the weave. The adjustment may be achieved, for example, via a central adjustment. Preferably, the guiding sinker bed is connected to the adjustment drive. The adjustment drive allows the position of the guiding sinker bed to be adjusted without intervention by the operator. The operation of the warp knitting machine can be automated within certain limits. Preferably, two guide sinkers are associated with each needle, wherein the two guide sinkers are arranged on both sides of the needle. A particularly large extension of the weft thread can thereby be achieved. The weft yarn must extend over two guide sinkers which in turn protrude beyond the needles when it is guided from one needle to an adjacent needle. In short, a rectangular guidance of the weft thread is thus obtained, which constitutes a greater reserve. Preferably, at least one gap between the needles does not guide the sinkers. The guiding sinker or sinkers can be arranged such that the guiding sinkers are always only in every other or every seco