CN108360141B

CN108360141B - Warp knitting machine

Info

Publication number: CN108360141B
Application number: CN201710191109.1A
Authority: CN
Inventors: M.阿诺德; A.凯勒; M.查基夫; F.奥波尔策; S.班德尔; J.费策尔
Original assignee: Karl Mayer R&D GmbH
Current assignee: Carlmeyerstol R & D Co.,Ltd.
Priority date: 2017-01-25
Filing date: 2017-03-28
Publication date: 2021-02-02
Anticipated expiration: 2037-03-28
Also published as: KR20180087861A; KR102006805B1; CN108360141A; EP3354780A1; EP3354780B1

Abstract

The invention relates to a warp knitting machine, comprising: a first knitting tool assembly (1) having a plurality of first knitting tools (2) capable of a uniform movement; and a second braiding tool assembly (8), wherein the first braiding tool assembly (1) and the second braiding tool assembly (8) are movable relative to each other during a looping cycle. It is desirable to provide a warp knitting machine with high productivity. For this purpose, the first knitting tool (2) is supported at the second knitting tool component (8) at least during a part of the knitting cycle.

Description

Warp knitting machine

Technical Field

The invention relates to a warp knitting machine, comprising: a first knitting tool assembly having a plurality of first knitting tools capable of a uniform motion; and a second knitting tool assembly, wherein the first knitting tool assembly and the second knitting tool assembly are movable relative to each other during a looping cycle (masschenbildungszyklus).

Background

In the production of knits, various types of knitting tools must be moved in the same manner. For this purpose, similar knitting tools are arranged on one guide bar and, if appropriate, on a plurality of guide bars. The guide bar extends in the width direction of the warp knitting machine.

The warp threads, which run in the form of a thread sheet for example, are connected to the other warp threads during the looping cycle in order to form a woven surface. For this purpose, a lateral movement of the warp threads is usually required, which in turn exerts a tensile force on the knitting tool, which can cause a deformation of the knitting tool depending on the magnitude of the force.

Within certain limits, allows deformation of the knitting tool. However, the permissible cyclic deformation of the knitting tool can also lead to increased loads. The consequences of such loads include, among others, failure and wear of the braiding tools, defects in the braiding, unachievable fineness and loss of productivity.

Disclosure of Invention

The aim of the invention is to provide a warp knitting machine with high productivity.

The object is achieved in a warp knitting machine of the type mentioned at the outset in that the first knitting tool is supported on the second knitting tool arrangement at least during a part of the knitting cycle.

With this construction, one can overcome the deformation of the first knitting tool within certain limits. The knitting tools can be considered in the present context in a simplified manner as bending beams which are clamped with the ends in the respective guide bars. The bending beam is bendable outside the sandwiching portion. Such a bend can be kept small if one now provides additional support outside the pinch by means of the second braiding tool assembly.

In an advantageous embodiment, the first knitting tools each have: a fixing region with which the first knitting tool is fixed at a guide bar; a working area; and a transition region between the fastening region and the working region, wherein the second knitting tool component interacts with the transition region. That is to say the working area protrudes from the support, so that the working area of the respective knitting tool can remain exposed for its intended task.

Preferably the transition region has a greater width than the working region. The transition region accordingly already has a slightly greater rigidity. Additionally, the backing is overcome by the second braiding tool assembly.

Advantageously, the second knitting tool assembly has lamellae between which lamellae channels are formed, in which lamellae channels the first knitting tools are arranged at least during a part of the knitting process. If the first knitting tool is supported on the second knitting tool component, the first knitting tool comes to bear against the lamella. One deviates here from the view that exists so far, that is, contact between the first knitting tool and the second knitting tool component should be avoided, but rather such contact is even used explicitly in order to form a support for the first knitting tool. If applicable, measures are taken here to reduce the friction between the knitting tools, for example to provide a friction-reducing coating.

Preferably, the inlet region between the lamella and the first knitting tool adjacent to the working region has a widening of the gap. A small gap is provided between the first knitting tool and the second knitting tool component (as long as the first knitting tool does not rest against the second knitting tool component). The gap allows for low wear co-action of the first braiding tool with the second braiding tool assembly. The widening of the gap is a measure in order to avoid that, in a certain position, the so-called "throwing position" (auskurfposition), the yarn is caught in the gap.

In a preferred embodiment, the gap widening can be formed by a chamfer at the lamella.

Alternatively or additionally, it can also be provided that the gap widening is formed by a thickness change of the first knitting tool. In both cases, an approximately triangular widening of the gap in cross section is obtained, in which widening the triangle can prevent the thread from becoming jammed in the cast position.

Advantageously, the first knitting tool is configured as a compound needle (Schiebernadeln) and the second knitting tool component is configured as a stripping comb (abschlagkammbare) or as a knitting sinker (Wirkplatine). The knockover bar is used in a raschel warp knitting machine (raschelmaschen), while the knitting sinkers are used in a tricot knitting machine (kettenwirkat) with practically the same function.

Drawings

The invention is described below in terms of preferred embodiments in connection with the accompanying drawings. Wherein:

figure 1 shows a very schematic representation of a knitting tool of a warp knitting machine,

figure 2 shows a modified design of the braiding tool assembly according to figure 1 in a casting position,

figure 3 shows the braiding tool assembly according to figure 2 in the knockover position,

FIG. 4 shows a first diagram for explaining the gap enlargement, an

Fig. 5 shows an alternative embodiment.

Detailed Description

Fig. 1 shows schematically a component of a warp knitting machine with a first knitting tool arrangement 1 having a plurality of first knitting tools which can move in a homogeneous manner. The first knitting tool is configured in the present exemplary embodiment as a compound needle. The first knitting tool 1 has a fastening region 3 (with which it is fastened to the guide bar 4), a working region 5 (which in the present exemplary embodiment has a needle 6), and a transition region 7, which is arranged between the fastening region 3 and the working region 5.

All the first knitting tools 2 are given the same type of movement during the knitting cycle by means of the guide bar 4.

Cooperating with the first knitting tool 2 is a second knitting tool component 8. The second knitting tool assembly 8 is configured in the present embodiment as a knockover bar. The knockover bar is commonly used in so-called raschel warp knitting machines. In a tricot machine, instead of the knockover bar, a knitting sinker can be used.

Irrespective thereof, the second knitting tool component 8 is constructed with a plurality of lamellae 9. Between the lamellae 9, lamella channels 10 are formed, in which the first knitting tool 2 is arranged at least during a part of the knitting process.

In this case a gap 11 is provided between the first knitting tool 2 and the foil 9. The gap 11 has a relatively small thickness. The gap only has to be so large that the first knitting tool 2 can move freely in the lamella channel 10.

However, this only applies to the undisturbed state. As soon as a force in the lateral direction acts on the working area 5 of the first knitting tool 2, a deformation of the first knitting tool 2 can be caused. The force can be applied, for example, by a thread which is actuated by the first knitting tool 2, more precisely by the working area 5. Such forces can occur in particular in the ejection position, as shown in fig. 1. Such forces can act parallel to the longitudinal extension of the guide bar 4. In this case, the first knitting tool 2 can be supported with its transition region 7 on a lamella 9 of the second knitting tool component 8. As can be seen without problems in fig. 1, the free length of the first knitting tool 2 in which bending can occur is thereby considerably reduced.

In fig. 1, the distance, i.e. the center distance of the first knitting tool 2, is plotted as "a".

The first knitting tool 2 has anyway a width b in the region of the lamella channel 10. The sheet 9 has a width c. In addition, a gap s is drawn. Such a braiding tool assembly is dimensioned such that a = b + c +2 s.

As can be seen in fig. 1, the transition region 7 has a greater thickness or width than the working region 5.

As can be seen from fig. 2 and 3, one can continue to design the transition region 7 with a thickness transition, i.e. with a first thickness in the region 12 and a second, greater thickness in the region 13. The second knitting tool is supported at the lamella 9 with an area of greater thickness.

As can be seen by comparing fig. 2 and 3, one can provide that the first knitting tool 2 is supported at the second knitting tool assembly 8 in the shot position, while said first knitting tool is disengaged from the second knitting tool assembly 8 in the knockover position (fig. 3). Accordingly, the doffing of the yarn operated by the first knitting tool 2 is not hindered by the second knitting tool component 8.

It is important for a process-safe knitting that no yarn is clamped between the first knitting element 2 and the second knitting element assembly 8 in the thrown position shown in fig. 2.

Fig. 4 and 5 show two possible solutions, how one can prevent such a pinch. These two possibilities can also be used in combination with each other. In both embodiments, a widening of the gap 11 is provided, i.e. a widening of the gap 11 is provided in an inlet region 14, which adjoins the working region 5.

For this purpose, in the embodiment according to fig. 4, the lamellae 9 have a chamfer 15, so that a strip width s is obtained on the side of the lamellae 9 facing the working region 5^*Wherein s is^*≥s。

In the embodiment according to fig. 5, the gap widening s^*Is formed by the thickness changing portion of the first knitting tool 2.

Claims

1. A warp knitting machine is provided with: a first knitting tool assembly (1) having a plurality of first knitting tools (2) capable of a uniform movement; and a second knitting tool assembly (8), wherein the first knitting tool assembly (1) and the second knitting tool assembly (8) are movable relative to each other during a knitting cycle, characterized in that the first knitting tool (2) is supported at the second knitting tool assembly (8) at least in a part of the knitting cycle, wherein the first knitting tool (2) is fixed at a guide bar (4), wherein the first knitting tool (2) is supported with respect to forces acting parallel to the longitudinal extension of the guide bar (4), wherein the first knitting tool (2) is configured as a compound needle and the second knitting tool assembly (8) is configured as a cast-off guide bar or as a knitting sinker.

2. Warp knitting machine according to claim 1, characterized in that said first knitting tools (2) each have: a fixing region (3) with which the first knitting tool is fixed at the guide bar (4); a working area (5); and a transition region (7) between the fastening region (3) and the working region (5), wherein the second knitting tool component (8) interacts with the transition region (7).

3. Warp knitting machine according to claim 2, characterized in that the transition area (7) has a greater width than the working area (5).

4. Warp knitting machine according to one of the claims 1 to 3, characterized in that the second knitting tool assembly (8) has lamellae (9) between which lamellae channels (10) are configured, in which lamellae channels the first knitting tools (2) are arranged at least during a part of the knitting process.

5. Warp knitting machine according to claim 4, characterized in that the entry area (14) between the lamella (9) and the first knitting tool (2) adjacent to the working area (5) has a widening of the gap(s)^*）。

6. Warp knitting machine according to claim 5, characterized in that the gap widening(s)^*) Is formed by a chamfer (15) at the lamella (9).

7. Warp knitting machine according to claim 5 or 6, characterized in that the gap widening(s)^*) Is formed by the thickness changing parts (12, 13) of the first knitting tool (2).