CZ19446U1 - Rope - Google Patents

Description

^(Field of the Invention

The present invention relates to a papermaking lead rope which, due to the new construction, has achieved a significant reduction in rope elongation as a priority rope property, and also the penetration of impregnation to the depth of individual yarns in the rope is favorably influenced. .

Background

Currently, several design types of Jan introducing paper mills are known. from whose construction is then derived mechanical production of these ropes. Known is a twisted papermaking lead rope which comprises three or four twisted strands and which is produced on a twisting machine.

This type of rope has the considerable disadvantage that it stretches considerably as a result of twisting.

The most common design type is a braided papermaking lead rope, which is produced on a braided circular machine. There are two main types of these ropes: rope with or without core. The core of the braided rope consists mainly of twisted polyamide cord, which is then braided. The main difference between a rope with and without a core is its cross-section. The core rope has a circular cross section, which fits better into the pulleys of the paper machine. However, its big disadvantage is that the rope becomes very difficult and time consuming. A paper core rope without a core is therefore more widely used for easier entanglement. To date, these stranded ropes are known and produced in four structural structures, representing:

: n - Eight strand rope, each strand consisting of several - usually four, six or eight multifold twisted yarns, twisted. The twist tends to be left-handed and right-handed, usually between 84 and 120 twists per meter of thread. With this rope it is possible to apply impregnation on both the thread and the surface of the braided rope. These ropes are the most used.

- Eight strand rope produced in two baths. The inlet twisted thread of its strand is grouped by two, twisted in a monofilament, and then braided as in the case of a rope according to the first structural structure. These yarns resist good mechanical stress, as the monofilament braid protects the yarns themselves as their sheath. The disadvantage of these ropes is that they are smooth and therefore unsuitable for introduction. After use, when their sheath is damaged, the ropes have a high ductility.

A rope with a structure such as said first rope except that it has one or more threads of multi-tilament replaced by spun threads of polyamide staple. This type of rope is best suited for insertion, only the spun staple can clog the pulleys of the paper machine when in use.

- Rope cabled. It is produced in two Strokes, namely by twisting threads and the rope is further twisted from braided yarns. The manufacture of this papermaking lead wire is difficult due to the difficult bonding of threads and braided strands, and therefore the production of these ropes is relatively long and costly.

The combined construction of a paper lead rope is also known. In this construction, the ropes comprise both twisted and braided strands, or the rope is twisted from twisted yarns. Ropes of this type exhibit both positive and negative properties of the ropes mentioned above.

All of these paper guiding ropes are made of twisted yarn. therefore, it is impossible to do without the use of twisting machines. The aim of this technical solution is to create a construction of a paper guiding rope, which would significantly simplify and simplify the technology of its mechanical production and at the same time achieve better technical and technological parameters. than the previously known and used paper guide ropes.

The essence of these solutions

It is not possible to dispense with all the previously known and above-mentioned designs of paper guiding ropes without twisting machines. The design of the paper lead rope according to this utility model is based on a significant change in the technology of its production, which is based on the braiding of non-spun, only twisted threads. The composite threads are the same as the twisted threads. The essence of the novel design of a paper guiding rope according to a utility model consists in that the rope consists, as hitherto, of braided strands, which are formed by threads of multi-strand and high-strength fibers. The strands of the rope, however, consist only of mutually associated threads. that is, thread without twist. The strands in this embodiment may alternatively also comprise one or more spun staple fiber threads according to the utility model, thereby achieving a higher frictional effect of the rope when carrying the paper in the paper machine.

Due to the absence of twisting, the production of papermaking rope is easier and faster. Unwoven multi-filament yarns are better impregnated, as the absorption of the impregnation is not limited by the twists that create poorly permeable spots in the yarn. thus contributing to the unevenness of the impregnation coating. When the yarn is unwoven, it forms a uniform surface, eliminating any irregularities in the impregnation coating. Another great advantage of the non-woven construction is the immediate grip of the rope when using it in a paper machine. The existing twisted springs tend to be docked and tightened due to twists. The nonwoven yarns are arranged in parallel with multifilaments, which immediately react their own tension to the tension caused by the engagement of the paper machine. Structurally, the utility paper with nonwoven strands can be designed with or without a core according to the utility pattern. The design of the rope according to this utility model also makes it possible to change the number of drumsticks on the stranding machine from the standard number of 16 drumsticks to 12 drumsticks

? about the machine. By this change of production, bulkier strands are obtained for braiding the rope with a higher content of non-twisted yarn, as a result of which the rope keeps its circular cross-section under tension in the paper machine. A considerable advantage of the papermaking lead rope of this utility model without a core, which is thus produced on a 12-stroke machine, is that the rope in the papermaking machine behaves in the same way as the prior art papermaking rope with a core.

BRIEF DESCRIPTION OF THE DRAWINGS

In the accompanying drawings, four exemplary embodiments of a paper lead rope according to a utility model are schematically illustrated. Giant. 1 shows a 16-strand rope without a core, FIG. 2 shows a cross-section of the rope. Giant. 3 shows a 16-strand rope with the addition of spun staple fibers, FIG. 4 shows a cross-section of the rope. Giant. 5 represents 12

5i) a strand without a core, FIG. 6 shows a cross-section of the strand. Giant. Fig. 7 shows a 12-core strand without core with the addition of spun staple fibers. Fig. 8 shows a cross-section of the strand.

Example of technical solution

The paper guide ropes 1 consist of 16 or even 2 braided strands 2 and, depending on the type of constriction, they contain a core or are without a core. The strands consist of a yarn 3 which is composed of multifilament high-strength fibers, usually polyamide fibers. According to the utility model, the strands 2 of the rope 1 are formed only of mutually associated yarns 3 without twisting, as shown in the 16-core strand 6 without the core, in Figs. 1 and 2, and in the 12-strand strand 7 without the core, The strands 2 and the strands 2 thus formed may also contain, if desired, a number of associated yarns 4 of spun staple fibers, e.g. polyamide fibers, as shown in the 16-strand cord 6, in Figures 3 and 4. 7 and 8. With the spun staple fiber spun yarn 4, a higher friction effect of the rope is achieved when the paper is carried in the paper machine.

Industrial applicability

The technical solution of the paper rope according to the utility model is applicable not only in the production of paper rope, but also in the construction and manufacture of other ropes and ropes. Due to the absence of a twisting operation in the production of the rope, it is possible to produce ropes with low tensile strength and also lower production costs.

Claims (1)

Claims Ν Λ Ο C Η R Λ Ν L ϊ. A papermaking lead wire with or without a core, consisting of spleen strands consisting of yarns of multi-filament high-strength fibers, characterized by: 6. The method according to claim 1, characterized in that the strands (2) of the rope (1) are formed from non-woven composite threads (3). 2. The paper guide rope of claim 1, characterized in that the strands (2) have at least one spun staple fiber thread (4) between the composite threads (3).