CN110616580B - Paper guiding rope and preparation method thereof - Google Patents
Paper guiding rope and preparation method thereof Download PDFInfo
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- CN110616580B CN110616580B CN201910919038.1A CN201910919038A CN110616580B CN 110616580 B CN110616580 B CN 110616580B CN 201910919038 A CN201910919038 A CN 201910919038A CN 110616580 B CN110616580 B CN 110616580B
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
- D02G3/045—Blended or other yarns or threads containing components made from different materials all components being made from artificial or synthetic material
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
- D02G3/28—Doubled, plied, or cabled threads
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
- D06C7/02—Setting
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/02—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B5/00—Making ropes or cables from special materials or of particular form
- D07B5/12—Making ropes or cables from special materials or of particular form of low twist or low tension by processes comprising setting or straightening treatments
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
- D07B7/02—Machine details; Auxiliary devices
- D07B7/027—Postforming of ropes or strands
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0063—Devices for threading a web tail through a paper-making machine
- D21G9/0072—Devices for threading a web tail through a paper-making machine using at least one rope
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/1096—Rope or cable structures braided
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2024—Strands twisted
- D07B2201/2029—Open winding
- D07B2201/203—Cylinder winding, i.e. S/Z or Z/S
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2036—Strands characterised by the use of different wires or filaments
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2041—Strands characterised by the materials used
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/20—Organic high polymers
- D07B2205/2039—Polyesters
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/20—Organic high polymers
- D07B2205/2046—Polyamides, e.g. nylons
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2401/00—Aspects related to the problem to be solved or advantage
- D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
- D07B2401/2055—Improving load capacity
Abstract
The application discloses a paper guide rope and a preparation method thereof, and belongs to the technical field of rope preparation. The preparation method of the paper guiding rope comprises the following steps: s1, stranding; s2, doubling and pre-weaving: ensuring that the tensions of all rope yarns in each S-direction rope bundle and each Z-direction rope bundle are consistent and uniformly arranged, and the average value of the length difference among the rope yarns is 1-5cm/100 m; s3, rope making: and (4) knitting the rope bundles obtained by the doubling and pre-knitting in the step (S2) to obtain the paper-guiding rope, and keeping the rope yarns in each rope bundle parallel and in a row to enter a knitting point in the knitting process, thereby obtaining the paper-guiding rope by knitting. The paper guiding rope prepared by the method enables the rope yarns in each weaving unit of the paper guiding rope to be closely distributed in a row, increases the contact area between the paper guiding rope and contact objects such as paper rolls, and improves the holding capacity of the paper guiding rope on the contact objects such as the paper rolls.
Description
Technical Field
The application relates to a paper leading rope and a preparation method thereof, and belongs to the technical field of rope preparation.
Background
A paper feed rope for a paper machine is a rope for guiding a paper roll, a paper sheet, a tissue paper or the like being produced through a drying cylinder, a paper feed roller, a size press or the like when the paper machine is started or is broken. Conventional draw ropes typically have a diameter of between 6mm and 16 mm.
In the process of using the paper leading rope, enough pressing force and adhesion force are required between the paper leading rope and paper, so that the paper leading rope is required to have larger friction performance, and the paper leading rope is required to have smaller static elongation so as to ensure that the paper leading rope has effective and stable holding capacity. In the existing preparation method of the paper-guiding rope, a single strand in each strand is twisted again to form rope yarns, and then the rope yarns are braided into the rope, the contact area of the braided rope prepared by the preparation method with paper is relatively small in the using process, so that the friction force between the paper-guiding rope and a contact object is relatively small, the relative sliding between the paper-guiding rope and the contact object is easy to occur, and meanwhile, the paper-guiding rope is easy to elastically deform in the using process, so that the paper-guiding rope is lengthened, and the holding capacity is unstable.
Therefore, a new method for preparing the paper guiding rope is needed to improve the paper holding capacity of the paper guiding rope.
Disclosure of Invention
In order to solve the problems, the paper guiding rope prepared by the preparation method enables the rope yarns in each weaving unit of the paper guiding rope to be closely distributed in a row, increases the contact area between the paper guiding rope and contact objects such as paper rolls and improves the holding capacity of the paper guiding rope on the contact objects such as the paper rolls.
According to one aspect of the application, a preparation method of a paper guiding rope is provided, and comprises the following steps:
s1, stranding: twisting at least 3 industrial filaments to form S-direction rope yarns and Z-direction rope yarns;
s2, doubling and pre-weaving: combining at least 3 rope yarns which are in the S direction and are obtained in the step S1 into 1-strand rope bundle in the S direction, combining at least 3 rope yarns which are in the Z direction into 1-strand rope bundle in the Z direction, and ensuring that the rope yarns are parallel and form a row in the S-direction rope bundle and the Z-direction rope bundle;
respectively winding the S-direction rope bundles and the Z-direction rope bundles on a bobbin, ensuring that the tension between each rope yarn in each S-direction rope bundle and each Z-direction rope bundle is consistent and uniformly arranged, and ensuring that the average value of the length difference between the rope yarns is 1-5cm/100 m;
s3, rope making: and (4) knitting the S-direction rope bundles and the Z-direction rope bundles obtained by the doubling and pre-knitting in the step (S2) to obtain the paper-guiding rope, and keeping the rope yarns in each rope bundle parallel and in a row to enter a knitting point in the knitting process, thereby obtaining the paper-guiding rope by knitting.
Combining rope yarns into rope bundles through a pre-weaving machine, and winding the rope bundles on a yarn tube; the weaving point is the intersection point of the rope bundle and the weaving rope.
Optionally, the fineness of the industrial filament is 630Den-1680Den, and the breaking strength is 7g/D-9 g/D. Specifically, the industrial filaments are nylon filaments and/or polyester filaments.
Further, the lower limit of the fineness of the industrial filament is selected from 630Den, 1000Den, 1500Den, 2000Den and 2500Den, and the upper limit is selected from 2500Den, 3000Den, 3500Den, 4000Den, 4500Den and 5000 Den.
Further, the breaking strength of the industrial filament is 8g/D-9 g/D. Further, the breaking strength of the industrial filaments was 8.5 g/D.
Further, the fineness of the single rope yarn is 630Den-5000 Den. Further, the lower limit of the single rope yarn fineness is selected from 630Den, 1000Den, 1500Den, 2000Den and 2500Den, and the upper limit is selected from 2500Den, 3000Den, 3500Den, 4000Den, 4500Den and 5000 Den.
Optionally, the twist of the S-direction rope yarns and the Z-direction rope yarns is 80T/m-300T/m.
Further, the twist of the rope yarn has a lower limit selected from 80T/m, 100T/m, 120T/m, 140T/m and 160T/m and an upper limit selected from 180T/m, 200T/m, 230T/m, 250T/m, 280T/m and 300T/m.
Optionally, the preparation method further comprises step S4: and heating and stretching the paper leading rope obtained in the step S3.
Optionally, the tensile tension of the paper leading rope is 10% -25% of the breaking strength of the paper leading rope, the drawing speed is 3m/s-8m/s, and the heating temperature is a value between the glass transition temperature and the melting point temperature of the industrial filament;
Furthermore, the tensile tension of the paper-guiding rope is 10% -20% of the breaking strength of the paper-guiding rope, the tensile speed is 5m/s-8m/s, and the heating temperature of the paper-guiding rope is preferably the melting point temperature of the industrial filament. The higher the heating temperature of the paper-guiding rope is, the shorter the heating and stretching time is.
Optionally, the S-direction rope yarns and the Z-direction rope yarns in the step S1 respectively comprise 3 to 8 industrial filaments;
in the step S2, each strand of S-direction rope bundle comprises 3-8S-direction rope yarns, and each strand of Z-direction rope bundle comprises 3-8Z-direction rope yarns.
The number of the yarns in each S-direction rope bundle or Z-direction rope bundle can be the same or different.
Optionally, in step S2, when doubling is performed in advance, the bobbin is moved axially while rotating radially, and the S-direction or Z-direction cord bundles are always kept perpendicular to the bobbin axis.
Wherein, the radial speed of the bobbin is 22-27mm/s, and the axial speed is 400-450 r/min.
Alternatively, in step S3, during weaving, an S-direction weaving unit is formed by at least 1S-direction rope bundle, 1Z-direction weaving unit is formed by at least 1Z-direction rope bundle, and a plurality of S-direction weaving units and Z-direction weaving units are woven alternately to obtain a paper guide rope, and each rope yarn in each S-direction weaving unit and each Z-direction weaving unit is maintained to be parallel and enter a weaving point in a row during weaving.
Preferably, the S-direction weaving unit may include 2 or 4S-direction ropes, and the Z-direction weaving unit may include 2 or 4Z-direction ropes.
Specifically, in step S3, the number of yarn spindles of the knitting machine is 12 to 32, and during knitting, the yarn tube around which the Z-direction cord bundle is wound is fixed to the yarn spindle rotating counterclockwise, and the yarn tube around which the S-direction cord bundle is wound is fixed to the yarn spindle rotating clockwise. The rope bundles on 2 or 4 spindles adjacent to each other in the same rotating direction form a weaving unit, and then each weaving unit is conveyed to a weaving point through the outer edge of the rope bundle distribution piece with the annular structure so as to keep each rope yarn in the S-direction rope bundles and the Z-direction rope bundles in parallel and in a row.
Alternatively, the S-direction and Z-direction ropes enter the weaving point via a rope distribution member horizontally disposed below the weaving point in step S3, and the S-direction and Z-direction ropes are transported to the weaving point closely to the outer edge of the rope distribution member to keep the respective yarns in the S-direction and Z-direction ropes parallel and in a row.
Specifically, the rope distribution piece is of a circular ring-shaped structure, and the central axis of the circular ring-shaped structure penetrates through the central point of the weaving point.
Alternatively, the axial angle of the rope yarns is changed by 0-10 ° after each rope yarn passes through the rope distribution member.
According to another aspect of the application, a paper leading rope is provided, and the paper leading rope is formed by interweaving an S-direction weaving unit and a Z-direction weaving unit;
each S-direction weaving unit and each Z-direction weaving unit are respectively composed of 6-32 rope yarns which are arranged in parallel.
Furthermore, each S-direction weaving unit and each Z-direction weaving unit are respectively composed of 7-24 rope yarns arranged in parallel.
Furthermore, the number of the S-direction weaving units is equal to that of the Z-direction weaving units; the number of the rope yarns in the S-direction weaving unit is equal to that of the rope yarns in the Z-direction weaving unit.
Further, the paper guiding ropes are interwoven into a plain weave by the S-direction weaving unit and the Z-direction weaving unit. The main reason is that the weaving rope has three basic weaves, namely plain weave, twill weave and satin weave, wherein the contact area of the paper guiding rope with the plain weave with paper or other contact objects in the using process is relatively larger on the premise of the same weaving unit, and the friction force between the paper guiding rope and the paper or other contact objects is further improved.
Benefits of the present application include, but are not limited to:
1. according to the preparation method of the paper-guiding rope, the single rope yarns in each weaving unit of the paper-guiding rope are parallel and closely distributed in a row, the contact area between the paper-guiding rope and contact objects such as paper is increased by increasing the number of the rope yarns in each weaving unit of the paper-guiding rope, so that the friction force between the paper-guiding rope and the contact objects such as paper is improved, and the holding capacity of the paper-guiding rope on the contact objects such as paper is further improved.
2. According to the preparation method of the paper leading rope, the prepared paper leading rope is heated and stretched, and the paper leading rope is subjected to heat setting, so that the initial elastic modulus of the paper leading rope is improved, the static working elongation of the paper leading rope is reduced, and the effective and stable grasping capacity of the paper leading rope is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic structural diagram of a paper guiding rope according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a paper-guiding rope according to an embodiment of the present application;
fig. 3 is a schematic view of a rope distribution member according to an embodiment of the present application.
Wherein, 1, the paper guiding rope, 21, S direction weaving unit, 22, Z direction weaving unit, 3, rope yarn, 4, weaving point, 5 rope bundle distribution piece, 6 rope bundles, 7, spindle, alpha, axial change angle.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
The raw materials in the examples of the present application were all purchased commercially, unless otherwise specified.
The analysis method in the examples of the present application is as follows:
a WDL-200 type breaking strength machine is used for testing the breaking strength of the paper guiding rope, and the testing method is based on GB/T8834-2006 determination of related physical and mechanical properties of ropes.
The linear density of the paper guiding rope is tested by using a DTE-185 type linear density testing instrument, and the testing method is based on GB/T8834-2006 determination of related physical and mechanical properties of the rope.
The static elongation of the paper-guiding rope is tested by using a WDL-200 type rope breaking strength machine instrument, and the test method is based on GB/T8834-2006 determination of related physical and mechanical properties of ropes.
A rope fatigue testing machine of model mlw-100 is used for testing the elongation of the paper guide rope with 30% breaking strength after 100 times of reciprocating, and the testing method is in accordance with the chemical fiber rope bending fatigue testing method of the enterprise standard.
The following detailed description of embodiments of the present application will be described in conjunction with the accompanying drawings and examples. The following examples are intended to illustrate the present application but are not intended to limit the scope of the present application.
Referring to fig. 1 and 2, the paper threading rope 1 prepared by the preparation method of the paper threading rope of the present application has all the rope yarns 3 closely distributed in a row in each weaving unit 2, and the number of the rope yarns 3 in each weaving unit 2 is 6-32.
As shown in fig. 3, the thread bundles 6 pass through the horizontally arranged thread bundle distribution member 5 when they enter the weaving point 4 from the spindle 7. The rope yarns in the rope bundles 6 pass through the outer edge of the rope bundle distribution piece 5 in a row and then enter the weaving point 4, the axial change angle alpha of the rope yarns is 0-10 degrees, and the rope yarns in the weaving units can be arranged in parallel after entering the weaving point.
In one embodiment, the rope distribution member 5 has a circular ring structure, and a central axis of the circular ring structure passes through a central point of the weaving point 4, so as to ensure that each rope has the same tension when entering the weaving point 4.
Example 1 preparation of paper-guiding rope # 1
The preparation method of the paper guide rope 1# comprises the following steps:
s1) stranding: selecting nylon 6 filament with the fineness of 1260Den and the breaking strength of 8.5g/D as a rope making material, twisting 3 nylon 6 filaments into S-direction rope yarns and Z-direction rope yarns through a twisting machine, wherein the twist of each rope yarn is 200T/m, and the number of the S-direction rope yarns is the same as that of the Z-direction rope yarns.
S2) doubling and pre-weaving: firstly, 4 rope yarns in the Z direction pass through a pre-weaving machine and are closely arranged in a row and wound on 4 yarn drums, 3 rope yarns in the Z direction are wound on 4 yarn drums for rope bundles in the same method, 4 rope yarns in the S direction are wound on 4 yarn drums for rope bundles, and finally 3 rope yarns in the S direction are wound on 4 yarn drums for rope bundles.
Wherein, each rope yarn in each rope bundle is ensured to be closely arranged in a row in the doubling process of the pre-weaving machine, and the tension among the rope yarns in each rope bundle is consistent and uniformly arranged; and in the process of winding the rope bundles on the yarn barrel, ensuring that the S-direction rope bundles or the Z-direction rope bundles are perpendicular to the yarn tubes, wherein the radial speed of the yarn tubes is 25mm/S, and the axial speed is 425r/min, so as to ensure that the average value of the length difference between the rope yarns in each strand of the rope bundles is (1-5) cm/100 m.
S3) rope making: firstly, selecting a #180-16 spindle quincunx type knitting machine, adjusting spindles into single knitting 2 spindles with a plain structure, namely, forming a knitting unit by ropes on 2 spindles adjacent to each other in the same rotation direction;
secondly, the 8 bobbins wound with the Z-direction rope bundles and pre-woven in the step S2) are installed on the spindle rotating anticlockwise, the 8 bobbins wound with the S-direction rope bundles are installed on the spindle rotating clockwise, then in the process of starting the weaving machine, the height of the circular ring structure is adjusted according to the distance from the spindle to the weaving point, all the rope bundles enter the weaving point from the spindle and are enclosed into the circular cone structure, the circular ring structure is horizontally arranged inside the circular cone structure to support all the rope bundles, then the rope yarn enters the weaving point from the spindle through the outer edge of the circular ring structure, and finally the paper guide rope 1# is obtained, wherein the axial change angle alpha of the rope yarn from the spindle to the weaving point is 8 degrees.
After the rope yarns in each rope bundle pass through the outer edge of the circular ring-shaped structure with the supporting function side by side, the rope yarns in each rope bundle are guaranteed to be uniformly distributed in a row after entering a weaving point.
S4) heating and stretching: heating and stretching the paper guide rope 1# woven in the step S3), wherein the heating temperature is 210 ℃; the tensile tension is 15% of the breaking load of the paper leading rope, and the tensile speed is 4 m/min.
Each weaving unit of the paper guiding rope 1# comprises 7 rope yarns distributed in a row, and the diameter of each rope yarn is 6 mm.
Example 2 preparation of paper-guiding rope # 2
The preparation method of the paper guide rope 2# comprises the following steps:
s1) stranding: the method comprises the steps of selecting FDY polyester filaments with the fineness of 1000Den and the breaking strength of 8.5g/D as rope making raw materials, twisting 5 FDY polyester filaments into S-direction rope yarns and Z-direction rope yarns through a twisting machine, wherein the twist of each rope yarn is 200T/m, and the number of the S-direction rope yarns is the same as that of the Z-direction rope yarns.
S2) doubling and pre-weaving: firstly, 3 rope yarns in the Z twisting direction pass through a pre-weaving machine and are closely arranged in a row and wound on 16 yarn drums, and 3 rope yarns in the S twisting direction are wound on 16 yarn drums for rope bundles in the same method;
wherein, each rope yarn in each rope bundle is ensured to be closely arranged in a row in the doubling process of the pre-weaving machine, and the tension among the rope yarns in each rope bundle is consistent and uniformly arranged; and in the process of winding the rope bundles on the yarn barrel, ensuring that the S-direction rope bundles or the Z-direction rope bundles are perpendicular to the yarn tubes, wherein the radial speed of the yarn tubes is 25mm/S, and the axial speed is 425r/min, so as to ensure that the average value of the length difference between the rope yarns in each strand of the rope bundles is (1-5) cm/100 m.
S3) rope making: firstly, selecting a #180-32 spindle quincunx type knitting machine, adjusting spindles into single 4 spindles of plain weave structure, namely, forming a knitting unit by ropes on 4 spindles adjacent to each other in the same rotation direction;
next, the 16 bobbins wound with the Z-direction cord bundles, which are performed the merging and pre-weaving in the step S2), are mounted on the spindle rotating counterclockwise, the 16 bobbins wound with the S-direction cord bundles are mounted on the spindle rotating clockwise, and then, in the process of opening the knitting machine, the height of the horizontally arranged circular ring structure located below the knitting point is adjusted according to the distance from the spindle to the knitting point, and referring to the corresponding part of example 1, the draw cord 2# is obtained, in which the axial change angle α of the cord yarn from the spindle to the knitting point is 8 °.
S4) heating and stretching: heating and stretching the paper guide rope No. 2 woven in the step S3), wherein the heating temperature is 210 ℃; the tensile tension is 15% of the breaking load of the paper leading rope, and the tensile speed is 4 m/s.
Each weaving unit of the paper guide rope 2# comprises 12 rope yarns distributed in a row, and the diameter of each rope yarn is 8 mm.
Example 3 preparation of paper-guiding rope # 3
S1) stranding: selecting a nylon 6 filament with the fineness of 1260Den and the breaking strength of 8.5g/D and an FDY polyester filament with the fineness of 1000Den and the breaking strength of 8.5g/D as rope making raw materials, twisting 2 nylon 6 filaments and 2 FDY polyester filaments into S-direction rope yarns and Z-direction rope yarns through a twisting machine, wherein the twist of each rope yarn is 200T/m, and the number of the S-direction rope yarns is the same as that of the Z-direction rope yarns.
S2) doubling and pre-weaving: 4 rope yarns in the Z twisting direction pass through a pre-weaving machine, are closely arranged in a row and are wound on 16 yarn drums, 4 rope yarns in the S twisting direction are wound on 8 yarn drums for rope bundles in the same method, and then 3 rope yarns in the S twisting direction are wound on 8 yarn drums for rope bundles;
wherein, each rope yarn in each rope bundle is ensured to be closely arranged in a row in the doubling process of the pre-weaving machine, and the tension among the rope yarns in each rope bundle is consistent and uniformly arranged; and in the process of winding the rope bundles on the yarn barrel, ensuring that the S-direction rope bundles or the Z-direction rope bundles are perpendicular to the yarn tubes, wherein the radial speed of the yarn tubes is 25mm/S, and the axial speed is 425r/min, so as to ensure that the average value of the length difference between the rope yarns in each strand of the rope bundles is (1-5) cm/100 m.
S3) rope making: firstly, selecting a #180-32 spindle quincunx type knitting machine, adjusting spindles into single 4 spindles of plain weave structure, namely, forming a knitting unit by ropes on 4 spindles adjacent to each other in the same rotation direction;
next, 16 bobbins wound with the Z-direction cord bundles, which are performed the doubling pre-weaving in the step S2), are mounted on the spindle rotating counterclockwise, and 16 bobbins wound with the S-direction cord bundles are mounted on the spindle rotating clockwise (among them, 8 bobbins wind the cord bundles of 3S-direction cord yarns, and 8 bobbins wind the cord bundles of 4S-direction cord yarns), and then, in the process of opening the knitting machine, the height of the horizontally arranged ring-shaped structure located below the knitting point is adjusted according to the distance from the spindle to the knitting point, and with reference to the corresponding portion of example 1, the paper guide cord 3# is obtained, in which the angle α of the axial change of the cord yarns from the spindle to the knitting point is 8 °.
S4) heating and stretching: heating and stretching the paper leading rope 3# woven in the step S3), wherein the heating temperature is 210 ℃; the tensile tension is 15% of the breaking load of the paper leading rope, and the tensile speed is 4 m/s.
Each weaving unit of the paper guiding rope 3# comprises 12-16 rope yarns distributed in a row, and the diameter of each rope yarn is 10 mm.
Example 4 preparation of leader 4#
The preparation method of the paper guide rope 4# comprises the following steps:
different from the preparation method of the paper leading rope No. 3, the method comprises the following steps:
s1) stranding: selecting nylon 6 filament with the fineness of 1260Den and the breaking strength of 8.5g/D as a rope making raw material, twisting 2 nylon 6 filaments into S-direction rope yarns and Z-direction rope yarns through a twisting machine, wherein the twist of each rope yarn is 200T/m, and the number of the S-direction rope yarns is the same as that of the Z-direction rope yarns.
S2) doubling and pre-weaving: passing 8 rope yarns in the Z twisting direction through a pre-weaving machine, closely arranging the rope yarns in a row, winding the rope yarns on 16 yarn bobbins, winding 8 rope yarns in the S twisting direction on 8 yarn bobbins for rope bundles in the same method, and winding 6 rope yarns in the S twisting direction on 8 yarn bobbins for rope bundles;
wherein, in the process of winding the rope bundles on the yarn barrel, the S-direction rope bundles or the Z-direction rope bundles are ensured to be vertical to the yarn tubes, the radial speed of the yarn tubes is 25mm/S, the axial speed is 425r/min, so as to ensure that the average value of the length difference between the rope yarns in each strand of the rope bundles is (1-5) cm/100 m.
S3) rope making: the 16 bobbins wound with the Z-direction cord bundles, which were previously woven in the doubling of S2), were mounted on the spindle rotating counterclockwise, and the 16 bobbins wound with the S-direction cord bundles were mounted on the spindle rotating clockwise (wherein 8 bobbins were wound with cord bundles of 6S-twist cord yarns, and 8 bobbins were wound with cord bundles of 8S-twist cord yarns), to obtain a paper cord 4#, in which the axial change angle α of cord yarns from the spindle to the weaving point was 8 °.
Each weaving unit of the paper guiding rope 4# comprises 24-32 rope yarns distributed in a row, and the diameter of each rope yarn is 14 mm.
Example 5 comparison of draw cords 1 '# -4' #
Comparative threading ropes 1 '#of6 mm in diameter, 2' #of8 mm in diameter, 3 '# of 10mm in diameter and 4' #of14 mm in diameter, prepared using the prior art, were obtained from the market.
Example 6 testing of the properties of the threading ropes 1# -4#, and comparative threading ropes 1 '# -4' #
The breaking strength, linear density, 50KG-150KG static elongation of the paper cord, and the elongation of the paper cord after 30% breaking strength repeated 100 times were measured for the paper cord 1# -4# prepared in examples 1-4, and the appearance of the paper cord after 30% breaking strength repeated 100 times for the paper cord 1# -4# and the paper cord 1 '# -4' # prepared in examples 1-4, respectively. The test results are shown in table 1.
TABLE 1
As can be seen from table 1, compared with the comparative paper guiding ropes 1 '# -4' #, the breaking strength of the paper guiding ropes 1# -4# is improved compared with that of the comparative paper guiding ropes 1 '# -4' #onthe premise of having the same diameter; the linear density is relatively reduced; meanwhile, the index of the appearance evaluation of the paper leading rope after 30% of breaking strength is performed 100 times in a reciprocating manner is also improved, and the index shows that: in the using process of the paper-guiding rope, the contact area of the paper-guiding rope and a contact object of the paper-guiding rope is effectively increased, and further the friction force between the paper-guiding rope and the contact object is improved, so rope yarns are obviously abraded, and the holding capacity of the paper-guiding rope is improved; the two indexes of the rope elongation after 30% strength breaking after 100 times of reciprocating and the static elongation of the 50KG-150KG paper leading rope are obviously improved and are in a reduction trend, mainly because the paper leading rope is subjected to heat setting in a heating and stretching process, the initial elastic modulus of the paper leading rope is improved, and the effective and stable holding capacity of the paper leading rope is improved.
The above description is only an example of the present application, and the protection scope of the present application is not limited by these specific examples, but is defined by the claims of the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the technical idea and principle of the present application should be included in the protection scope of the present application.
Claims (4)
1. The preparation method of the paper guiding rope is characterized by comprising the following steps:
s1, stranding: twisting at least 3 industrial filaments to form S-direction rope yarns and Z-direction rope yarns;
s2, doubling and pre-weaving: combining at least 3 rope yarns which are in the S direction and are obtained in the step S1 into 1-strand rope bundle in the S direction, combining at least 3 rope yarns which are in the Z direction into 1-strand rope bundle in the Z direction, and ensuring that the rope yarns are parallel and form a row in the S-direction rope bundle and the Z-direction rope bundle;
respectively winding the S-direction rope bundles and the Z-direction rope bundles on a bobbin, ensuring that the tension between each rope yarn in each S-direction rope bundle and each Z-direction rope bundle is consistent and uniformly arranged, and ensuring that the average value of the length difference between the rope yarns is 1-5cm/100 m;
s3, rope making: knitting the S-direction rope bundles and the Z-direction rope bundles obtained by the doubling and pre-knitting in the step S2 to obtain a paper-guiding rope, and keeping all rope yarns in each rope bundle parallel and in a row to enter a knitting point in the knitting process, thereby obtaining the paper-guiding rope by knitting;
in step S3, the S-direction rope bundles and the Z-direction rope bundles enter a weaving point through a rope bundle distribution piece, the rope bundle distribution piece is horizontally arranged below the weaving point, and the S-direction rope bundles and the Z-direction rope bundles are conveyed to the weaving point by clinging to the outer edge of the rope bundle distribution piece so as to keep the rope yarns in the S-direction rope bundles and the Z-direction rope bundles in parallel and in a row;
After each rope yarn passes through the rope bundle distribution piece, the axial angle of the rope yarn is changed by 0-10 degrees;
the rope bundle dividing component is of a circular ring-shaped structure, and the central axis of the circular ring-shaped structure penetrates through the central point of the weaving point;
s4: heating and stretching the paper leading rope obtained in the step S3;
the tensile tension of the paper leading rope is 10% -25% of the breaking strength of the paper leading rope, the tensile speed is 3m/s-8m/s, and the heating temperature is a numerical value between the glass transition temperature and the melting point temperature of the industrial filament for manufacturing the rope;
the heating temperature of the paper guiding rope is the melting point temperature of the industrial filament;
in the step S2, when doubling and pre-weaving, combining the rope yarns into a rope bundle through a pre-weaving machine, winding the rope bundle on a bobbin, and axially moving the bobbin while radially rotating the bobbin, and always ensuring that the S-direction rope bundle or the Z-direction rope bundle is axially vertical to the bobbin;
in step S3, during weaving, at least 1 strand of S-direction rope forms an S-direction weaving unit, at least 1 strand of Z-direction rope forms 1Z-direction weaving unit, a plurality of S-direction weaving units and Z-direction weaving units are woven in a staggered mode to obtain a paper guide rope, and each rope yarn in each S-direction weaving unit and each rope yarn in each Z-direction weaving unit are kept parallel and enter a weaving point in a row in the weaving process;
The number of the S-direction weaving units is equal to that of the Z-direction weaving units; the paper guiding ropes are interwoven into plain weave by the S-direction weaving unit and the Z-direction weaving unit;
the breaking strength of the paper guiding rope is 14.08KN-40.25 KN; the static elongation of the paper guiding rope is 2.5% -3.1%; the elongation of the paper guiding rope is 5.1% -10.4%.
2. The method for preparing the paper-guiding rope according to claim 1, wherein the fineness of the industrial filaments is 630Den-1680Den, and the breaking strength is 7g/D-9 g/D;
the twist of the S-direction rope yarns and the Z-direction rope yarns is 80T/m-300T/m.
3. The method for preparing the paper-guiding rope according to claim 1, wherein the S-direction rope yarns and the Z-direction rope yarns in the step S1 respectively comprise 3 to 8 industrial filaments;
in the step S2, each strand of S-direction rope bundle comprises 3-8S-direction rope yarns, and each strand of Z-direction rope bundle comprises 3-8Z-direction rope yarns.
4. A paper guiding rope prepared by the preparation method of the paper guiding rope of any one of the preceding claims, characterized in that the S-direction weaving unit and the Z-direction weaving unit are formed by interweaving and weaving;
each S-direction weaving unit and each Z-direction weaving unit are respectively composed of 6-32 rope yarns which are arranged in a row.
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