CN104762713B - The three component similarities and differences walk the method and device of drawing-off regulation and control yarn linear density and blending ratio - Google Patents
The three component similarities and differences walk the method and device of drawing-off regulation and control yarn linear density and blending ratio Download PDFInfo
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Abstract
The invention discloses the methods of a kind of three components similarities and differences step drawing-off regulation and control yarn linear density and blending ratio, and it includes the front and back level-one drafting unit being arranged and two level drafting unit to specifically include drawing-off and twist system；Level-one drafting unit includes combination rear roller, middle roller；Two level drafting unit includes front roller and the middle roller；On the basis of the benchmark linear velocity of benchmark line segment, the rotating speed of the first rear roller, the second rear roller and/or third rear roller on increase and decrease combination rear roller realizes the online dynamic adjustment of the line density or/and blending ratio of i-th section of yarns Y.The point point yarn produced using the method and device of the present invention, slub, tufted yarn colour mixture are more uniform accurate, pass through the constant setting speed rotation enumerated in control, it ensure that blending effect is more stablized, will not be changed significantly the yarn aberration of different batches.
Description
Technical Field
The invention relates to the field of spinning in textile engineering, in particular to a method and a device for regulating and controlling the linear density and the blending ratio of yarns by three-component asynchronous and synchronous two-stage drafting.
Background
A yarn is an elongated fiber assembly formed by twisting fibers in a parallel orientation. When the fibers are unevenly distributed in the length direction of the yarn, the linear density (or appearance) of the fibers is increased by a dynamic linear density (dynamic thickness) on the basis of a reference linear density (reference thickness), so that the linear density (or thickness) of the yarn is changed. The degree of such uneven distribution can be classified into slub yarns, dotted yarns, and the like, or fancy yarns with varying linear density. If the blending ratio of the yarn can be changed while the linear density of the yarn is changed, fancy yarns with variable linear density and colors can be formed, and the type of yarn is defined as colorful variable density yarn, and can be specifically divided into colorful slub yarn, colorful dot yarn and the like.
The present method for producing variable linear density yarn by ring spinning basically adopts the steps of respectively feeding a roving strand by using middle and rear rollers, and utilizing non-uniform feeding of rear roller to make intermittent spinning so as to produce variable linear density yarn. For example, the principle of the invented intermittent spinning technology (No. ZL01126398.9) is that an auxiliary yarn strand B fed from back roller is passed through the processes of non-uniform drafting by middle and back rollers, and then is converged with another main yarn strand A fed from back point of middle roller, and fed into front drafting zone, and after drafted by front and middle rollers, the yarn is delivered from front nip, and fed into twisting zone and twisted together to form yarn. Because the auxiliary yarn is fed by the back roller in a clearance mode and is converged with the main yarn, the main yarn fiber is uniformly attenuated to a certain linear density under the action of the main drafting multiple of the front zone, and the auxiliary yarn fiber is attached to the main yarn fiber to form discontinuous and non-uniform linear density distribution. The uneven feeding of the back roller and the fluctuation amount of the auxiliary yarn are controlled, so that different effects such as bamboo joints, point points and the like can be finally formed on the yarn.
The spinning process of the variable linear density yarn in the prior art has the following limitations:
① when two different raw material (or different color) roves are used as main and auxiliary yarn strands, the blending ratio (color blending ratio) of the yarns cannot be randomly adjusted on line, and the variation of the blending ratio (color blending ratio) cannot be adjusted while the thickness of the yarns is varied.
② the main yarn and the auxiliary yarn can not be exchanged in the spinning process (the main yarn fiber strip is the fiber strip which is continuously distributed in the yarn, the auxiliary yarn fiber strip is the fiber strip which is discretely distributed in the yarn), thereby leading to the monotonous pattern of the spun yarn and less variable factors.
③, the reproducibility of the pattern is poor, the final shape of the formed slub (coarse detail) and the shape of the point are related to the spindle speed of the spinning machine by the existing yarn forming method for changing the linear density of the yarn, and the shape of the slub (coarse detail) and the shape and the color of the point are different due to different spindle speeds.
Disclosure of Invention
The invention aims to solve the problems, and provides a method for spinning colorful bunchy yarn and colorful point yarn by online dynamic regulation of linear density and blending ratio of three-component asynchronous drafting regulation yarn, which changes the traditional three-component front-back zone synchronous drafting into three-component separation asynchronous drafting (hereinafter referred to as first-stage asynchronous drafting) and three-component combined synchronous drafting (hereinafter referred to as second-stage synchronous drafting), controls the dynamic change of the three-component mixing ratio and the linear density of the yarn by the first-stage asynchronous drafting, and controls the equivalent linear density (or the reference linear density) of the yarn by the second-stage synchronous drafting.
In order to achieve the purpose, the method for regulating and controlling the linear density and the blending ratio of the yarn by three-component asynchronous and synchronous drafting disclosed by the invention specifically comprises the following steps of:
1) the drafting and twisting system comprises a primary drafting unit and a secondary drafting unit which are arranged in front and back;
2) the primary drafting unit comprises a combined rear roller and a middle roller; the combined back roller has three rotational degrees of freedom and comprises a first back roller, a second back roller and a third back roller which are arranged on the same back roller shaft side by side; the first back roller, the second back roller and the third back roller are respectively at a speed Vh1、Vh2And Vh3Moving; middle roller with speed VzIs rotated at the speed of (1); the secondary synchronous drafting unit comprises a front roller and a middle roller; front roller with surface linear velocity VqRotating;
respectively setting the linear densities of the first component roving, the second component roving and the third component roving drafted by the first rear roller, the second rear roller and the third rear roller as rho1、ρ2And ρ3And the linear density of the yarn Y obtained after the front roller drafting twisting is rhoy，
3) Dividing the yarn Y into n sections according to a set blending ratio and/or linear density, wherein the linear density and the blending ratio of each section of yarn Y are the same, and the linear density or the blending ratio of two adjacent sections is different; when the i-th section of yarn Y is drafted, the linear speeds of the first back roller, the second back roller and the third back roller are respectively Vh1i、Vh2iAnd Vh3iWhere i ∈ (1,2, …, n);
the ith component formed by the first component roving, the second component roving and the third component roving through two-stage drafting and twistingAfter segment Y, the blending ratio k1i、k2iAnd k3iCan be expressed as follows:
the linear density of the i-th section of yarn Y is as follows:
wherein,the second-stage draft ratio;
4) let a section of the n sections of yarn Y with the lowest linear density be defined as a reference line section, and the reference line density of the section be rho0And the reference line speeds of the first back roller, the second back roller and the third back roller of the section are respectively Vh10、Vh20And Vh30(ii) a The reference blending ratio of the first component roving, the second component roving and the third component roving of the section is respectively k10、k20And k30
The linear velocity of the middle roller is kept constant,
and V isz＝Vh10+Vh20+Vh30(6)；
At the same time, let the secondary draft ratioConstant;
wherein the reference linear velocity V of the first back roller, the second back roller and the third back rollerh10、Vh20And Vh30According to the material and reference line density rho of the first component roving, the second component roving and the third component roving0And a reference blend ratio k10、k20And k30Setting in advance;
5) when drafting and blending the i-th section yarn Y, the set linear density rho of the i-th section is knownyiAnd setting the blending ratio k1i、k2iAnd k3iOn the premise of calculating the linear speed V of the first back roller, the second back roller and the third back roller according to the formulas (2) to (6)h1i、Vh2iAnd Vh3i；
6) Reference line velocity V in reference line segmenth10、Vh20And Vh30On the basis, the rotating speeds of the first back roller, the second back roller and/or the third back roller are increased or decreased, and the on-line dynamic adjustment of the linear density or/and the blending ratio of the i-th section of yarn Y is realized.
Further, let ρ be1＝ρ2＝ρ3Where ρ, equation (5) is simplified as:
calculating linear speeds V of the first back roller, the second back roller and the third back roller according to formulas (2) - (4) and (6) - (7)h1i、Vh2iAnd Vh3i(ii) a At the reference line velocity Vh10、Vh20And Vh30On the basis of the yarn density and/or the blending ratio of the ith section of yarn Y, the rotating speed of the first back roller, the second back roller and/or the third back roller is/are increased or decreased.
Further, at the moment when the yarn Y is switched from the i-1 th stage to the i-th stage, the linear density of the yarn Y is increased by the dynamic increment Deltarho on the basis of the reference linear densityyiI.e. thickness change Δ ρyi(ii) a For this purpose, the linear velocities of the first back roller, the second back roller and the third back roller are respectively increased correspondingly on the basis of the reference line velocity, namely (V)h10+Vh20+Vh30)→(Vh10+ΔVh1i+Vh20+ΔVh2i+Vh30+ΔVh3i) And the increment of the linear density of the yarn Y is as follows:
linear density rho of the yarn YyiCan be expressed as follows:
let Delta Vi＝ΔVh1i+ΔVh2i+ΔVh3iThen (8) becomes:
by controlling the sum delta V of the linear velocity increments of the first back roller, the second back roller and the third back rolleriA linear density variation of the yarn Y is achieved.
Further, let ρ be1＝ρ2＝ρ3At the instant when yarn Y switches from the i-1 th stage to the i-th stage, the blending ratio of yarn Y, i.e., equations (2) to (4), is reduced to ρ:
adjusting the blending ratio of the yarn Y by controlling the linear velocity increment of the first back roller, the second back roller and the third back roller;
wherein,
ΔVh1i＝k1i*(Vz+ΔVi)-Vh10
ΔVh2i＝k2i*(Vz+ΔVi)-Vh20
ΔVh3i＝k3i*(Vz+ΔVi)-Vh30。
further, let Vh1i*ρ1+Vh2i*ρ2+Vh3i*ρ3H is a constant, then Δ ViThe yarn density is constantly 0, so that the linear density is kept unchanged while the blending ratio of the yarn Y is adjusted.
Further, let Δ Vh1i、ΔVh2iAnd Δ Vh3iOne or two of the roving yarn components are zero, the other roving yarn components are not zero, the variation of one or two roving yarn components in the yarn Y is realized, the other roving yarn components are not varied, and the adjusted blending ratio is as follows:
wherein k, j ∈ (1,2,3), and k ≠ j.
Further, let Δ Vh1i、ΔVh2iAnd Δ Vh3iAll are not zero, three thicknesses in the yarn Y are realizedVariation of yarn composition.
Further, let Vh1i、Vh2iAnd Vh3iOne or two of which are zero and the other of which are non-zero, a discontinuity in one or both roving components in the i-th yarn section Y is achieved.
A three-component asynchronous and synchronous drafting yarn linear density and blending ratio regulating device comprises a control system and an actuating mechanism, wherein the actuating mechanism comprises a three-component split-combination asynchronous and synchronous two-stage drafting mechanism, a twisting mechanism and a winding forming mechanism; the secondary drafting mechanism comprises a primary drafting unit and a secondary drafting unit; the primary drafting unit comprises a combined rear roller and a middle roller; the combined back roller has three rotational degrees of freedom and comprises a first back roller, a second back roller and a third back roller which are arranged on the same back roller shaft side by side; the second-level drafting unit comprises a front roller and a middle roller.
Furthermore, the control system mainly comprises a PLC programmable controller, a servo driver, a servo motor and the like.
Further, any one of the first back roller, the second back roller and the third back roller is fixedly arranged on the back roller shaft, and the other two back rollers are arranged on the back roller shaft in a mutually independent rotating mode.
Further, in the drafting process, the speed of the middle roller is fixed and is not greater than the sum of the speeds of the first back roller, the second back roller and the third back roller.
The dot yarn and the slub yarn produced by the method and the device of the invention have more uniform and accurate color mixing, ensure more stable blending effect by controlling the rotation of the constant set speed listed in the middle, and have no obvious change even if the yarn color difference of different batches. The following table shows the comparison of the technical effects of the present invention with the prior art.
Therefore, the technical effect of the invention is obvious.
Drawings
FIG. 1 is a schematic view of a two-stage drawing spinning apparatus;
FIG. 2 is a schematic view of the structure of the assembled back roller;
FIG. 3 is a side view showing the structure of the two-stage draft spinning device;
FIG. 4 is a view showing a traveling path of a yarn in the secondary draft in the embodiment;
fig. 5 is a schematic diagram of the control system.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1-5, a method for regulating and controlling the linear density and the blending ratio of yarns by three-component asynchronous and synchronous drafting specifically comprises the following steps:
1) the drafting and twisting system comprises a primary drafting unit and a secondary drafting unit which are arranged in front and back;
2) the primary drafting unit comprises a combined rear roller 11 and a middle roller 3; the combined back roller 11 has three rotational degrees of freedom and comprises a first back roller 5, a second back roller 7 and a third back roller 9 which are arranged on the same back roller shaft side by side; the secondary drafting unit comprises a front roller 1 and a middle roller 3. Reference numeral 4 denotes an upper leather roller corresponding to the middle roller 3, and reference numerals 6, 8, and 10 denote three upper leather rollers corresponding to the three rear rollers. Reference numeral 2 denotes a top roller corresponding to the front roller 1. 13 and 14 are respectively a winding forming mechanism and a guide roller, and 15 is a yarn Y.
The first back roller, the second back roller and the third back roller are respectively at a speed Vh1、Vh2And Vh3Moving; in the middle of the rollerVelocity VzIs rotated at the speed of (1); the secondary synchronous drafting unit comprises a front roller and a middle roller; front roller with surface linear velocity VqRotating;
as shown in fig. 2, the 3-degree-of-freedom combination back roller with triple nesting, three movable back rollers 5, 7 and 9 are looped on the same mandrel and are respectively driven by pulleys 16, 22 and 17.
Fig. 4 is a diagram of a travel path of first through three component rovings. The three-component roving is subjected to separation asynchronous drafting by a rear combination roller, synchronous drafting by a middle roller and mixing by a collector at a front roller to form yarn Y. The first-stage asynchronous drafting can accurately control the dynamic change of the mixing proportion of the two components and the linear density of the yarn, and the second-stage synchronous drafting controls the equivalent linear density (or the reference linear density) of the yarn. The combination of the two makes the blended yarn more uniform and the breakage rate lower.
As shown in fig. 5, the control system mainly includes a PLC programmable controller, a servo driver, a servo motor, and the like. The programmable controller controls the motor to drive the roller, the steel collar plate, the spindle and the like to work through the servo driver.
The linear densities of the first component roving, the second component roving and the third component roving drafted by the first rear roller, the second rear roller and the third rear roller are respectively rho1、ρ2And ρ3And the linear density of the yarn Y obtained after the front roller drafting twisting is rhoy，
3) Dividing the yarn Y into n sections according to a set blending ratio and/or linear density, wherein the linear density and the blending ratio of each section of yarn Y are the same, and the linear density or the blending ratio of two adjacent sections is different; when the i-th section of yarn Y is drafted, the linear speeds of the first back roller, the second back roller and the third back roller are respectively Vh1i、Vh2iAnd Vh3iWhere i ∈ (1,2, …, n);
after the i-th section of yarn Y is formed by the first component roving, the second component roving and the third component roving through two-stage drafting and twisting, the blending ratio k of the i-th section of yarn Y1i、k2iAnd k3iCan be expressed as follows:
the linear density of the i-th section of yarn Y is as follows:
wherein,the second-stage draft ratio;
4) let a section of the n sections of yarn Y with the lowest linear density be defined as a reference line section, and the reference line density of the section be rho0And the reference line speeds of the first back roller, the second back roller and the third back roller of the section are respectively Vh10、Vh20And Vh30(ii) a The reference blending ratio of the first component roving, the second component roving and the third component roving of the section is respectively k10、k20And k30
The linear velocity of the middle roller is kept constant,
and V isz＝Vh10+Vh20+Vh30(6)；
At the same time, let the secondary draft ratioConstant;
wherein the reference linear velocity V of the first back roller, the second back roller and the third back rollerh10、Vh20And Vh30According to the material and reference line density rho of the first component roving, the second component roving and the third component roving0And a reference blend ratio k10、k20And k30Setting in advance;
5) when drafting and blending the i-th section yarn Y, the set linear density rho of the i-th section is knownyiAnd setting the blending ratio k1i、k2iAnd k3iOn the premise of calculating the linear speed V of the first back roller, the second back roller and the third back roller according to the formulas (2) to (6)h1i、Vh2iAnd Vh3i；
6) Reference line velocity V in reference line segmenth10、Vh20And Vh30On the basis, the rotating speeds of the first back roller, the second back roller and/or the third back roller are increased or decreased, and the on-line dynamic adjustment of the linear density or/and the blending ratio of the i-th section of yarn Y is realized.
7) Let ρ be1＝ρ2＝ρ3Where ρ, equation (5) is simplified as:
calculating linear speeds V of the first back roller, the second back roller and the third back roller according to formulas (2) - (4) and (6) - (7)h1i、Vh2iAnd Vh3i(ii) a At the reference line velocity Vh10、Vh20And Vh30On the basis of the yarn density and/or the blending ratio of the ith section of yarn Y, the rotating speed of the first back roller and/or the second back roller is/are increased or decreased to realize the set linear density or/and blending ratio of the ith section of yarn Y.
8) In the case of yarn Y from the i-1 stAt the moment when the section is switched to the i-th section, the linear density of the yarn Y is set to be increased by the dynamic increment delta rho on the basis of the reference linear densityyiI.e. thickness occurrence Δ ρyi(ii) a For this purpose, the linear velocities of the first back roller, the second back roller and the third back roller are respectively increased correspondingly on the basis of the reference line velocity, namely (V)h10+Vh20+Vh30)→(Vh10+ΔVh1i+Vh20+ΔVh2i+Vh30+ΔVh3i) And the increment of the linear density of the yarn Y is as follows:
linear density rho of the yarn YyiCan be expressed as follows:
let Delta Vi＝ΔVh1i+ΔVh2i+ΔVh3iThen (8) becomes:
by controlling the sum delta V of the linear velocity increments of the first back roller, the second back roller and the third back rolleriA linear density variation of the yarn Y is achieved.
9) Let ρ be1＝ρ2＝ρ3At the instant when the yarn Y is switched from the i-1 th stage to the i-th stage, the blending ratio of the yarn Y, i.e., equations (2) and (3), is simplified as:
adjusting the blending ratio of the yarn Y by controlling the linear velocity increment of the first back roller, the second back roller and the third back roller;
wherein,
ΔVh1i＝k1i*(Vz+ΔVi)-Vh10
ΔVh2i＝k2i*(Vz+ΔVi)-Vh20
ΔVh3i＝k3i*(Vz+ΔVi)-Vh30。
10) let Vh1i*ρ1+Vh2i*ρ2+Vh3i*ρ3H is a constant, then Δ ViThe yarn density is constantly 0, so that the linear density is kept unchanged while the blending ratio of the yarn Y is adjusted.
11) Let Delta Vh1i、ΔVh2iAnd Δ Vh3iOne or two of the roving yarn components are zero, the other roving yarn components are not zero, the variation of one or two roving yarn components in the yarn Y is realized, the other roving yarn components are not varied, and the adjusted blending ratio is as follows:
wherein k, j ∈ (1,2,3), and k ≠ j.
12) Let Delta Vh1i、ΔVh2iAnd Δ Vh3iAnd if the components are not zero, the variation of the three roving components in the yarn Y is realized.
13) Let Vh1i、Vh2iAnd Vh3iOne or two of which are zero and the other of which are non-zero, a discontinuity in one or both roving components in the i-th yarn section Y is achieved.
The above description is only for the purpose of describing several preferred embodiments of the present application with reference to the accompanying drawings, but the present application is not limited thereto, and any improvements and/or modifications made by those skilled in the art without departing from the spirit of the present application are within the protection scope of the present application.
Claims (6)
1. A method for regulating and controlling the linear density and the blending ratio of yarns by three-component asynchronous and synchronous drafting is characterized by comprising the following steps:
1) the drafting and twisting system comprises a primary drafting unit and a secondary drafting unit which are arranged in front and back;
2) the primary drafting unit comprises a combined rear roller and a middle roller; the combined back roller has three rotational degrees of freedom and comprises a first back roller, a second back roller and a third back roller which are arranged on the same back roller shaft side by side; the first back roller, the second back roller and the third back roller are respectively at a speed Vh1、Vh2And Vh3Moving; middle roller with speed VzIs rotated at the speed of (1); the secondary drafting unit comprises a front roller and a middle roller; front roller with surface linear velocity VqRotating; any one of the first rear roller, the second rear roller and the third rear roller is fixedly arranged on the rear roller shaft, the other two rear rollers are arranged on the rear roller shaft in a mutually independent rotating manner, and the speed of the middle roller is fixed and is not more than the sum of the speeds of the first rear roller, the second rear roller and the third rear roller in the drafting process;
respectively setting the linear densities of the first component roving, the second component roving and the third component roving drafted by the first rear roller, the second rear roller and the third rear roller as rho1、ρ2And ρ3And the linear density of the yarn Y obtained after the front roller drafting twisting is rhoy，
3) Dividing the yarn Y into n sections according to a set blending ratio and/or linear density, wherein the linear density and the blending ratio of each section of yarn Y are the same, and the linear density or the blending ratio of two adjacent sections is different; when the i-th section of yarn Y is drafted, the linear speeds of the first back roller, the second back roller and the third back roller are respectively Vh1i、Vh2iAnd Vh3iWhere i ∈ (1,2, …, n);
after the i-th section of yarn Y formed by the first component roving, the second component roving and the third component roving through two-stage drafting and twisting, the blending ratio k of the first component roving, the second component roving and the third component roving is1i、k2iAnd k3iCan be expressed as follows:
the linear density of the i-th section of yarn Y is as follows:
wherein,the second-stage draft ratio;
4) let a section of the n sections of yarn Y with the lowest linear density be defined as a reference line section, and the reference line density of the section be rho0And the reference line speeds of the first back roller, the second back roller and the third back roller of the section are respectively Vh10、Vh20And Vh30(ii) a The reference blending ratio of the first component roving, the second component roving and the third component roving of the section is respectively k10、k20And k30，
The linear velocity of the middle roller is kept constant,
and V isz＝Vh10+Vh20+Vh30(6)；
At the same time, let the secondary draft ratioConstant;
wherein the reference linear velocity V of the first back roller, the second back roller and the third back rollerh10、Vh20And Vh30According to the material and reference line density rho of the first component roving, the second component roving and the third component roving0And a reference blend ratio k10、k20And k30Setting in advance;
5) when drafting and blending the i-th section yarn Y, the set linear density rho of the i-th section is knownyiAnd setting the blending ratio k1i、k2iAnd k3iOn the premise of calculating the linear speed V of the first back roller, the second back roller and the third back roller according to the formulas (2) to (6)h1i、Vh2iAnd Vh3i；
6) Reference line velocity V in reference line segmenth10、Vh20And Vh30On the basis, the rotating speeds of the first back roller, the second back roller and/or the third back roller are increased or decreased, so that the on-line dynamic adjustment of the linear density or/and the blending ratio of the i-section yarn Y is realized;
let ρ be1＝ρ2＝ρ3Where ρ, equation (5) is simplified as:
calculating linear speeds V of the first back roller, the second back roller and the third back roller according to formulas (2) - (4) and (6) - (7)h1i、Vh2iAnd Vh3i(ii) a At the reference line velocity Vh10、Vh20And Vh30On the basis of the yarn density and/or the blending ratio of the ith section of yarn Y, increasing and decreasing the rotating speed of the first back roller, the second back roller and/or the third back roller;
at the moment when the yarn Y is switched from the section i-1 to the section i, the linear density of the yarn Y is set to be increased by a dynamic increment △ rho on the basis of the reference linear densityyiI.e. thickness generation △ ρyi(ii) a For this purpose, the linear velocities of the first back roller, the second back roller and the third back roller are respectively increased correspondingly on the basis of the reference line velocity, namely (V)h10+Vh20+Vh30)→(Vh10+ΔVh1i+Vh20+ΔVh2i+Vh30+ΔVh3i) And the increment of the linear density of the yarn Y is as follows:
linear density rho of the yarn YyiCan be expressed as follows:
let Delta Vi＝ΔVh1i+ΔVh2i+ΔVh3iThen (8) becomes:
by controlling the sum delta V of the linear velocity increments of the first back roller, the second back roller and the third back rolleriA linear density variation of the yarn Y is achieved.
2. A method of regulating the linear density and blend ratio of a yarn as in claim 1 wherein let ρ be1＝ρ2＝ρ3At the instant when yarn Y switches from the i-1 th stage to the i-th stage, the blending ratio of yarn Y, i.e., equations (2) to (4), is reduced to ρ:
adjusting the blending ratio of the yarn Y by controlling the linear velocity increment of the first back roller, the second back roller and the third back roller;
wherein,
ΔVh1i＝k1i*(Vz+ΔVi)-Vh10
ΔVh2i＝k2i*(Vz+ΔVi)-Vh20
ΔVh3i＝k3i*(Vz+ΔVi)-Vh30。
3. the method for regulating and controlling the linear density and blending ratio of yarns according to claim 2, wherein V is madeh1i*ρ1+Vh2i*ρ2+Vh3i*ρ3H is a constant, then Δ ViThe yarn density is constantly 0, so that the linear density is kept unchanged while the blending ratio of the yarn Y is adjusted.
4. The method for regulating and controlling the linear density and blending ratio of yarns according to claim 2, wherein Δ V is adjustedh1i、ΔVh2iAnd Δ Vh3iOne or two of the roving yarn components are zero, the other roving yarn components are not zero, the variation of one or two roving yarn components in the yarn Y is realized, the other roving yarn components are not varied, and the adjusted blending ratio is as follows:
wherein k, j ∈ (1,2,3), and k ≠ j.
5. The method for regulating and controlling the linear density and blending ratio of yarns according to claim 2, wherein Δ V is adjustedh1i、ΔVh2iAnd Δ Vh3iAnd if the components are not zero, the variation of the three roving components in the yarn Y is realized.
6. The method for regulating and controlling the linear density and blending ratio of yarns according to claim 2, wherein V is madeh1i、Vh2iAnd Vh3iOne or two of which are zero and the other of which are non-zero, a discontinuity in one or both roving components in the i-th yarn section Y is achieved.
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| PCT/CN2015/085269 WO2016155166A1 (en) | 2015-03-27 | 2015-07-28 | Method and apparatus for three-component asynchronous stretching and dynamic configuration of yarn count and blending ratio |
| US15/308,365 US10316436B2 (en) | 2015-03-27 | 2015-07-28 | Method and device of dynamically configuring linear density and blending ratio of yarn by three-ingredient asynchronous/synchronous drafted |
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| CN105040194B (en) * | 2015-08-21 | 2018-01-16 | 江南大学 | The asynchronous input of four slivers and the revolving cup spinning method and device of three fractions comb |
| CN105063821B (en) * | 2015-08-21 | 2018-01-19 | 江南大学 | The asynchronous input of three slivers and the revolving cup spinning method and device of more fractions comb |
| CN105220291B (en) * | 2015-11-16 | 2017-06-16 | 项炳海 | A kind of three color section coloured yarn spinning apparatus and Yarn spinning method |
| CN106757621A (en) * | 2016-11-14 | 2017-05-31 | 江南大学 | A kind of drawing-off spinning apparatus of three roller three and Yarn spinning method |
| CN108570736A (en) * | 2018-03-15 | 2018-09-25 | 江阴芗菲服饰有限公司 | A kind of colored bunchy yarn line and its application |
| CN108660565B (en) * | 2018-05-31 | 2020-11-24 | 德州华源生态科技有限公司 | Production method of three-channel air injection vortex blended yarn |
| CN109750400B (en) * | 2019-03-13 | 2024-03-22 | 无锡市和展机电技术有限公司 | Alternating drafting three-channel spinning device and spinning method of variable-count variable-ratio variable-twist yarn |
| CN109825916B (en) * | 2019-03-13 | 2024-04-19 | 江阴美纶纱业有限公司 | Double-channel hollow spindle fancy yarn forming device and method |
| CN110079898B (en) * | 2019-05-29 | 2024-08-30 | 江南大学 | Multichannel ring spindle fancy twisting device and interactive asymmetric twisting method |
| CN110424082B (en) * | 2019-08-14 | 2021-11-02 | 愉悦家纺有限公司 | Method for spinning gradient yarns by three-primary-color fiber coupling blending based on discrete gradient chromatography |
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