CN104790074B - The five component similarities and differences walk the method and device of drawing-off regulation and control yarn linear density and blending ratio - Google Patents
The five 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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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/32—Regulating or varying draft
- D01H5/36—Regulating or varying draft according to a pre-arranged pattern, e.g. to produce slubs
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Abstract
The invention discloses the methods of a kind of five 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, third rear roller, the 4th rear roller and/or the 5th 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 five-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
In order to solve the problems, the invention aims to provide a method for spinning colorful bunchy yarn and colorful point yarn by online dynamic control of linear density and blending ratio of five-component asynchronous drafting control yarn, which changes the traditional five-component front-back zone synchronous drafting into five-component separation asynchronous drafting (hereinafter referred to as first-stage asynchronous drafting) and five-component combination synchronous drafting (hereinafter referred to as second-stage synchronous drafting), controls the dynamic change of the five-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 invention discloses a method for regulating and controlling the linear density and the blending ratio of yarns by five-component asynchronous and synchronous drafting, which 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 and a middle roller; the combined back roller has five rotational degrees of freedom and comprises a first back roller, a second back roller, a third back roller, a fourth back roller and a fifth back roller which are arranged on the same back roller shaft side by side; the first back roller, the second back roller, the third back roller, the fourth back roller and the fifth back roller are respectively at a speed Vh1、Vh2、Vh3、Vh4And Vh5Moving; 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;
respectively setting the linear densities of the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving drafted by the first rear roller, the second rear roller, the third rear roller, the fourth rear roller and the fifth rear roller as rho1、ρ2、ρ3、ρ4And ρ5And 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, the third back roller, the fourth back roller and the fifth back roller are respectively Vh1i、Vh2i、Vh3i、Vh4iAnd Vh5iWhere i ∈ (1,2, …, n); after the i-th section of yarn Y formed by the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving through two-stage drafting and twisting, the blending ratio k of the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving is1i、k2i、k3i、k4iAnd k5iCan 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, the third back roller, the fourth back roller and the fifth back roller of the section are respectively Vh10、Vh20、Vh30、Vh40And Vh50(ii) a The reference blending ratio of the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving of the section is respectively k10、k20、k30、k40And k50，
The linear velocity of the middle roller is kept constant,
and V isz＝Vh10+Vh20+Vh30+Vh40+Vh50(8)；
At the same time, let the secondary draft ratioConstant;
wherein, the reference line speeds V of the first back roller, the second back roller, the third back roller, the fourth back roller and the fifth back rollerh10、Vh20、Vh30、Vh40And Vh50According to the material and reference line density rho of the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving0And a reference blend ratio k10、k20、k30、k40And k50Advance the timeSetting;
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、k2i、k3i、k4iAnd k5iOn the premise, linear speeds V of the first back roller, the second back roller, the third back roller, the fourth back roller and the fifth back roller are calculated according to formulas (2) to (8)h1i、Vh2i、Vh3i、Vh4iAnd Vh5i；
6) Reference line velocity V in reference line segmenth10、Vh20、Vh30、Vh40And Vh50On the basis, the rotating speeds of the first back roller, the second back roller, the third back roller, the fourth back roller and/or the fifth back roller are increased or decreased, and the on-line dynamic adjustment of the linear density or/and the blending ratio of the i-section yarn Y is realized.
Further, let ρ be1＝ρ2＝ρ3＝ρ4＝ρ5Where ρ, equation (7) 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) - (6) and (8) - (9)h1i、Vh2i、Vh3i、Vh4iAnd Vh5i(ii) a At the reference line velocity Vh10、Vh20、Vh30、Vh40And Vh50On 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, the third back roller, the fourth back roller and/or the fifth back roller is increased or decreased to realize the set yarn density and/or blending ratio of the ith section of yarn Y.
Further, at the instant 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 a dynamic increment △ ρ based on the reference linear densityyiI.e. thickness variation △ ρyi(ii) a For this purpose, the first back roller and the second back rollerThe linear velocities of the back roller, the third back roller, the fourth back roller and the fifth back roller are respectively subjected to corresponding increment on the basis of the reference line velocity, namely (V)h10+Vh20+Vh30+Vh40+Vh50)→(Vh10+ΔVh1i+Vh20+ΔVh2i+Vh30+ΔVh3i+Vh40+ΔVh4i+Vh50+ΔVh5i) 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+ΔVh3i+ΔVh4i++ΔVh5iThen (10) becomes:
by controlling the sum delta V of the linear velocity increments of the first back roller, the second back roller, the third back roller, the fourth back roller and the fifth back rolleriA linear density variation of the yarn Y is achieved.
Further, let ρ be1＝ρ2＝ρ3＝ρ4＝ρ5At 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 (6), 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, the third back roller, the fourth back roller and the fifth back roller;
wherein,
ΔVh1i＝k1i*(Vz+ΔVi)-Vh10
ΔVh2i＝k2i*(Vz+ΔVi)-Vh20
ΔVh3i＝k3i*(Vz+ΔVi)-Vh30
ΔVh4i＝k4i*(Vz+ΔVi)-Vh40
ΔVh5i＝k5i*(Vz+ΔVi)-Vh50。
further, let Vh1i*ρ1+Vh2i*ρ2+Vh3i*ρ3+Vh4i*ρ4+Vh5i*ρ5H 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、ΔVh2i、ΔVh3i、ΔVh4iAnd Δ Vh5iWherein, any 1-4 of the roving yarn components are zero, and the others are not zero, the variation of 1-4 roving yarn components in the yarn Y is realized, while the other roving yarn components are not varied, and the blending ratio after adjustment is as follows:
wherein k, j ∈ (1,2,3,4,5), and k ≠ j.
Further, let Δ Vh1i、ΔVh2i、ΔVh3i、ΔVh4iAnd Δ Vh5iAnd if the number of the rough yarns is not zero, the variation of the five rough yarn components in the yarn Y is realized.
Further, let Vh1i、Vh2i、Vh3i、Vh4iAnd Vh5iOf which 1-4 are zero and others are not, a discontinuity of 1-4 roving components in the i-th yarn Y is achieved.
A device for regulating and controlling the linear density and the blending ratio of yarns by five-component asynchronous and synchronous drafting comprises a control system and an actuating mechanism, wherein the actuating mechanism comprises a five-component split-combined 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 five rotational degrees of freedom and comprises a first back roller, a second back roller, a third back roller, a fourth back roller and a fifth back roller which are arranged on the same back roller shaft side by side; the five back rollers are sequentially and adjacently arranged, and the driving mechanisms of the five back rollers are arranged on two sides of the five back rollers; the second-level drafting unit comprises a front roller and a middle roller.
Further, the third rear roller is fixedly arranged on the rear roller shaft; the other four back rollers are respectively symmetrically arranged at two sides of the third back roller, and the five back rollers can independently rotate; the second back roller is provided with a second shaft sleeve connected with a driving mechanism of the second back roller, the second shaft sleeve is sleeved on the back roller shaft, and the first back roller is rotatably sleeved on the second shaft sleeve; the fourth back roller is provided with a fourth shaft sleeve connected with the driving mechanism, the fourth shaft sleeve is sleeved on the back roller shaft, and the fifth back roller is rotatably sleeved on the shaft sleeve.
Furthermore, the control system mainly comprises a PLC programmable controller, a servo driver, a servo motor and the like.
Furthermore, a horn mouth is arranged between the combined back roller and the middle roller, the middle roller keeps the speed unchanged, the primary drafting unit forms a blending or color mixing unit, and the secondary drafting unit forms a simple linear density adjusting unit.
Through setting up five back rollers side by side on a radical axis to its drive arrangement sets up in both sides, and its mechanical structure is compacter, and makes five kinds of roving that five back rollers drafted press close to more when the blending, can effectively prevent the drive setting interference and the pollution to the yarn at the during operation, and when five kinds of primary colors yarns passed through the horn mouth, the centre gripping angle was littleer, and it is more even to be favorable to the mixture of yarn, also difficult fracture.
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, the third back roller, the fourth back roller and the fifth 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.
Example 1
A method for regulating and controlling the linear density and the blending ratio of yarns by five-component asynchronous and synchronous drafting comprises the following steps:
1) as shown in fig. 1-4, the drafting and twisting system comprises a primary drafting unit and a secondary drafting unit arranged in tandem;
2) the primary drafting unit comprises a combined rear roller and a middle roller; the combined back roller has five rotational degrees of freedom and comprises a first back roller, a second back roller, a third back roller, a fourth back roller and a fifth back roller which are arranged on the same back roller shaft side by side; first back roller, second back roller and first back rollerThe three back rollers, the fourth back roller and the fifth back roller respectively take the speed Vh1、Vh2、Vh3、Vh4And Vh5Moving; middle roller with speed VzIs rotated at the speed of (1); the secondary synchronous drafting unit comprises a front roller and a middle roller; the front roller rotates at a surface linear velocity Vq;
respectively setting the linear densities of the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving drafted by the first rear roller, the second rear roller, the third rear roller, the fourth rear roller and the fifth rear roller as rho1、ρ2、ρ3、ρ4And ρ5And the linear density of the yarn Y obtained after the front roller drafting twisting is rhoy。
In fig. 1, 6, 8, 10, 12 and 14 are four movable rollers of a combined roller consisting of mutually nested shaft sleeves, 5, 7, 9, 11 and 13 are upper leather rollers corresponding to each rear roller, 3 and 4 are a middle roller and an upper leather roller, and 1 and 2 are a front roller and an upper leather roller. 25. 26, 28, 30 are bearings.
Fig. 2 shows a five-nested 5-degree-of-freedom combination back roller, and four movable back rollers 6, 8, 10, 12 and 14 are driven by a mandrel 20 and pulleys 33, 34, 35 and 36 respectively. Figure 3 shows a split asynchronous and synchronous two-stage drafting device for ring spinning,respectively represent the axes of the back roller, the middle roller and the front roller. The middle roller and the back roller form a first-stage drafting, and the front roller and the middle roller form a second-stage drafting.
And in the process of forming the yarns, five pieces of rough yarns are respectively fed into corresponding independently driven primary drafting mechanisms in parallel to be respectively subjected to asynchronous drafting, are synchronously drafted and converged by a secondary drafting mechanism, and are twisted into the yarns. Five rovings are then subjected to separate and merge drafts and asynchronous and synchronous drafts, respectively.
Five nested back roller surface linear speedsDegree is respectively Vh1、Vh2、Vh3、Vh4、Vh5The surface linear velocity of the middle roller is VzThe surface linear velocity of the front roller is Vq. Five coaxial rear rollers with the same outer diameter respectively correspond to five coaxial rear upper leather rollers with the same outer diameter, five pairs of upper and lower leather rings which are arranged in parallel and correspond up and down in the rear area grip the rough yarn. During spinning, five roving strands are positioned by a yarn guide rod and a bell mouth in the process of drafting and twisting, so that the roving strands travel according to the path shown in fig. 4. Rho1、ρ2、ρ3、ρ4And ρ5Four rovings are nipped by a rear roller1、a2、a3、a4And a5At different speeds Vh1、Vh2、Vh3、Vh4And Vh5Feeding the first stage drafting zone to a middle roller holding point b1、b2、b3、b4And b5And at a speed VzLeading out, subjecting five fibrous strips to eh1＝(Vz-Vh1)/Vh1、eh2＝(Vz-Vh1)/Vh1、eh3＝(Vz-Vh3)/Vh3、eh4＝(Vz-Vh4)/Vh4And eh5＝(Vz-Vh5)/Vh5The linear density of the asynchronous drafted fiber strands is rho1′、ρ2′、ρ3′、ρ4' and rho5' then enters a secondary drafting zone and meets at a front roller holding point c, and the surface speed V of the front rollerqThe linear density of the five fiber strands under the synchronous drafting action of (1) becomes rho1″、ρ1″、ρ3″、ρ4"and ρ5The five fiber strips are combined at the jaw c of the front roller and then twisted together to form the yarn with the linear density of (rho)1″+ρ2″+ρ3″+ρ4″+ρ5"). (the effect of the twist reduction is not considered here).
The linear density of the yarn Y obtained after the front roller drafting twisting is rhoyThe following were used:
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, the third back roller, the fourth back roller and the fifth back roller are respectively Vh1i、Vh2i、Vh3i、Vh4iAnd Vh5iWhere i ∈ (1,2, …, n); after the i-th section of yarn Y formed by the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving through two-stage drafting and twisting, the blending ratio k of the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving is1i、k2i、k3i、k4iAnd k5iCan 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, the third back roller, the fourth back roller and the fifth back roller of the section are respectively Vh10、Vh20、Vh30、Vh40And Vh50(ii) a The reference blending ratio of the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving of the section is respectively k10、k20、k30、k40And k50，
The linear velocity of the middle roller is kept constant,
and V isz＝Vh10+Vh20+Vh30+Vh40+Vh50(8)；
At the same time, let the secondary draft ratioConstant;
wherein, the reference line speeds V of the first back roller, the second back roller, the third back roller, the fourth back roller and the fifth back rollerh10、Vh20、Vh30、Vh40And Vh50According to the material and reference line density rho of the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving0And a reference blend ratio k10、k20、k30、k40And k50Setting in advance;
5) when the i-th section yarn Y is drafted and blended, the set linear density sigma of the i-th section is knownyiAnd setting the blending ratio k1i、k2i、k3i、k4iAnd k5iOn the premise, linear speeds V of the first back roller, the second back roller, the third back roller, the fourth back roller and the fifth back roller are calculated according to formulas (2) to (8)h1i、Vh2i、Vh3i、Vh4iAnd Vh5i；
6) Reference line velocity V in reference line segmenth10、Vh20、Vh30、Vh40And Vh50On the basis, the rotating speeds of the first back roller, the second back roller, the third back roller, the fourth back roller and/or the fifth back roller are increased or decreased, and the on-line dynamic adjustment of the linear density or/and the blending ratio of the i-section yarn Y is realized.
7) Let ρ be1＝ρ2＝ρ3＝ρ4＝ρ5Where ρ, equation (7) 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) - (6) and (8) - (9)h1i、Vh2i、Vh3i、Vh4iAnd Vh5i(ii) a At the reference line velocity Vh10、Vh20、Vh30、Vh40And Vh50On 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, the third back roller, the fourth back roller and/or the fifth back roller is increased or decreased to realize the set yarn density and/or blending ratio of the ith section of yarn Y.
8) 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 variation △ ρyi(ii) a For this purpose, the linear velocities of the first back roller, the second back roller, the third back roller, the fourth back roller and the fifth back roller are respectively increased correspondingly on the basis of the reference line velocity, namely (V)h10+Vh20+Vh30+Vh40+Vh50)→(Vh10+ΔVh1i+Vh20+ΔVh2i+Vh30+ΔVh3i+Vh40+ΔVh4i+Vh50+ΔVh5i) 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+ΔVh3i+ΔVh4i++ΔVh5iThen (10) becomes:
by controlling the sum delta V of the linear velocity increments of the first back roller, the second back roller, the third back roller, the fourth back roller and the fifth back rolleriA linear density variation of the yarn Y is achieved.
9) Let ρ be1＝ρ2＝ρ3＝ρ4＝ρ5At 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 (6), 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, the third back roller, the fourth back roller and the fifth back roller;
wherein,
ΔVh1i＝k1i*(Vz+ΔVi)-Vh10
ΔVh2i＝k2i*(Vz+ΔVi)-Vh20
ΔVh3i＝k3i*(Vz+ΔVi)-Vh30
ΔVh4i＝k4i*(Vz+ΔVi)-Vh40
ΔVh5i＝k5i*(Vz+ΔVi)-Vh50。
10) let Vh1i*ρ1+Vh2i*ρ2+Vh3i*ρ3+Vh4i*ρ4+Vh5i*ρ5H 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、ΔVh2i、ΔVh3i、ΔVh4iAnd Δ Vh5iAny 1-4 of them are zero, others are notThen the change of 1-4 roving components in the yarn Y is realized, while other roving components are not changed, and the adjusted blending ratio is as follows:
wherein k, j ∈ (1,2,3,4,5), and k ≠ j.
12) Let Delta Vh1i、ΔVh2i、ΔVh3i、ΔVh4iAnd Δ Vh5iAnd if the number of the rough yarns is not zero, the variation of the five rough yarn components in the yarn Y is realized.
13) Let Vh1i、Vh2i、Vh3i、Vh4iAnd Vh5iOf which 1-4 are zero and others are not, a discontinuity of 1-4 roving components in the i-th yarn Y is achieved.
Example 2
A device for spinning colorful bunchy and dotted yarns based on five-component two-stage drafting comprises a control system and an actuating mechanism, wherein the actuating mechanism comprises a five-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;
as shown in fig. 1 and 2, the primary drafting unit comprises a combined back roller 15 and a middle roller 3; the combined back roller 15 has five rotational degrees of freedom and comprises a first back roller 6, a second back roller 8, a third back roller 10, a fourth back roller 12 and a fifth back roller 14 which are arranged on the same back roller shaft 20 in parallel; the secondary drafting unit comprises a front roller 1 and a middle roller 3. The number 4 is the top leather roller corresponding to the middle roller 3, and the numbers 5, 7, 9, 11 and 13 are the five top leather rollers corresponding to the five back rollers. Reference numeral 2 denotes a top roller corresponding to the front roller 1.
As shown in fig. 2, five nested 5-degree-of-freedom combination back rollers, 6, 8, 10, 12 and 14, are looped on the same spindle 20 and driven by pulleys 35, 36, 32, 33 and 34, respectively. The five back rollers are arranged next to each other in sequence, and driving mechanism belt pulleys 35, 36, 32, 33 and 34 are arranged on two sides of the five back rollers. Through setting up five back rollers side by side on a radical axis to its drive arrangement sets up in both sides, and its mechanical structure is compacter, and makes five kinds of roving that five back rollers drafted press close to more when the blending, can effectively prevent the drive setting interference and the pollution to the yarn at the during operation, and when five kinds of primary colors yarns passed through the horn mouth, the centre gripping angle was littleer, and it is more even to be favorable to the mixture of yarn, also difficult fracture.
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 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 five-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 five rotational degrees of freedom and comprises a first back roller, a second back roller, a third back roller, a fourth back roller and a fifth back roller which are arranged on the same back roller shaft side by side; first back roller and second back rollerThe third back roller, the fourth back roller and the fifth back roller respectively rotate at a speed Vh1、Vh2、Vh3、Vh4And Vh5Moving; middle roller with speed VzIs rotated at the speed of (1); the secondary drafting unit comprises a front roller and a middle roller; the front roller rotates at a surface linear velocity Vq; the third rear roller is fixedly arranged on the rear roller shaft; the other four back rollers are respectively symmetrically arranged at two sides of the third back roller, and the five back rollers can independently rotate; the second back roller is provided with a second shaft sleeve connected with a driving mechanism of the second back roller, the second shaft sleeve is sleeved on the back roller shaft, and the first back roller is rotatably sleeved on the second shaft sleeve; the fourth back roller is provided with a fourth shaft sleeve connected with a driving mechanism of the fourth back roller, the fourth shaft sleeve is sleeved on the back roller shaft, the fifth back roller is rotatably sleeved on the shaft sleeve, and 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, the third back roller, the fourth back roller and the fifth back roller in the drafting process;
respectively setting the linear densities of the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving drafted by the first rear roller, the second rear roller, the third rear roller, the fourth rear roller and the fifth rear roller as rho1、ρ2、ρ3、ρ4And ρ5And 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, the third back roller, the fourth back roller and the fifth back roller are respectively Vh1i、Vh2i、Vh3i、Vh4iAnd Vh5iWhere i ∈ (1,2, …, n); the first groupAfter the i-section yarn Y formed by the rough yarn, the second component rough yarn, the third component rough yarn, the fourth component rough yarn and the fifth component rough yarn through two-stage drafting and twisting, the blending ratio k of the I-section yarn Y1i、k2i、k3i、k4iAnd k5iCan 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, the third back roller, the fourth back roller and the fifth back roller of the section are respectively Vh10、Vh20、Vh30、Vh40And Vh50(ii) a The first component roving, the second component roving, the third component roving, the fourth component roving and of this sectionThe reference blending ratio of the rough yarn of the fifth component is k10、k20、k30、k40And k50，
The linear velocity of the middle roller is kept constant,
and V isz＝Vh10+Vh20+Vh30+Vh40+Vh50(8)；
At the same time, let the secondary draft ratioConstant;
wherein, the reference line speeds V of the first back roller, the second back roller, the third back roller, the fourth back roller and the fifth back rollerh10、Vh20、Vh30、Vh40And Vh50According to the material and reference line density rho of the first component roving, the second component roving, the third component roving, the fourth component roving and the fifth component roving0And a reference blend ratio k10、k20、k30、k40And k50Setting 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、k2i、k3i、k4iAnd k5iOn the premise, linear speeds V of the first back roller, the second back roller, the third back roller, the fourth back roller and the fifth back roller are calculated according to formulas (2) to (8)h1i、Vh2i、Vh3i、Vh4iAnd Vh5i；
6) Reference line velocity V in reference line segmenth10、Vh20、Vh30、Vh40And Vh50On the basis, the rotating speed of the first back roller, the second back roller, the third back roller, the fourth back roller and/or the fifth back roller is 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＝ρ3＝ρ4＝ρ5Where ρ, equation (7) 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) - (6) and (8) - (9)h1i、Vh2i、Vh3i、Vh4iAnd Vh5i(ii) a At the reference line velocity Vh10、Vh20、Vh30、Vh40And Vh50On 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, the third back roller, the fourth back roller and/or the fifth back roller is increased or decreased;
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 variation △ ρyi(ii) a For this purpose, the linear velocities of the first back roller, the second back roller, the third back roller, the fourth back roller and the fifth back roller are respectively increased correspondingly on the basis of the reference line velocity, namely (V)h10+Vh20+Vh30+Vh40+Vh50)→(Vh10+ΔVh1i+Vh20+ΔVh2i+Vh30+ΔVh3i+Vh40+ΔVh4i+Vh50+ΔVh5i) 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+ΔVh3i+ΔVh4i++ΔVh5iThen (10) becomes:
by controlling the sum delta V of the linear velocity increments of the first back roller, the second back roller, the third back roller, the fourth back roller and the fifth 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＝ρ3＝ρ4＝ρ5At 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 (6), 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, the third back roller, the fourth back roller and the fifth back roller;
wherein,
ΔVh1i＝k1i*(Vz+ΔVi)-Vh10
ΔVh2i＝k2i*(Vz+ΔVi)-Vh20
ΔVh3i＝k3i*(Vz+ΔVi)-Vh30
ΔVh4i＝k4i*(Vz+ΔVi)-Vh40
ΔVh5i＝k5i*(Vz+ΔVi)-Vh50。
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*ρ3+Vh4i*ρ4+Vh5i*ρ5H 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、ΔVh2i、ΔVh3i、ΔVh4iAnd Δ Vh5iWherein, any 1-4 of the roving yarn components are zero, and the others are not zero, the variation of 1-4 roving yarn components in the yarn Y is realized, while the other roving yarn components are not varied, and the blending ratio after adjustment is as follows:
wherein k, j ∈ (1,2,3,4,5), 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、ΔVh2i、ΔVh3i、ΔVh4iAnd Δ Vh5iAnd if the number of the rough yarns is not zero, the variation of the five rough yarn 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、Vh2i、Vh3i、Vh4iAnd Vh5iOf which 1-4 are zero and others are not, a discontinuity of 1-4 roving components in the i-th yarn Y is achieved.
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| US15/123,651 US10316434B2 (en) | 2015-03-27 | 2015-07-28 | Method and device of dynamically configuring linear density and blending ratio of yarn by five-ingredient asynchronous/synchronous drafting |
| PCT/CN2015/085268 WO2016155165A1 (en) | 2015-03-27 | 2015-07-28 | Method and device for dynamically allocating linear density and blending ratio of yarn through five-component asynchronous drafting |
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| CN105113066B (en) * | 2015-08-21 | 2018-02-16 | 江南大学 | The asynchronous input of five slivers and the revolving cup spinning method and device of three fractions comb |
| CN106245168A (en) * | 2016-09-21 | 2016-12-21 | 江南大学 | Five-channel asynchronous drawing-off Compact Spinning yarn feeding device, colour-spun yarns five primary colours color blending effect regulation and control method and colour mixture section coloured yarn |
| CN109735977B (en) * | 2019-03-13 | 2023-09-19 | 安徽新雅新材料有限公司 | Alternating drafting five-channel spinning device and spinning method of variable-count variable-ratio variable-twist yarn |
| CN109811442B (en) * | 2019-03-13 | 2023-10-27 | 经纬智能纺织机械有限公司 | Six-channel alternating drafting twisting coating ring spindle fancy yarn forming device and method |
| CN109735976B (en) * | 2019-03-13 | 2023-11-28 | 经纬智能纺织机械有限公司 | Seven-channel alternating drafting twisting coating ring spindle fancy yarn forming device and method |
| CN110079907B (en) * | 2019-05-06 | 2023-06-27 | 滁州霞客环保色纺有限公司 | Double-layer wrapping structure negative poisson ratio three-component composite yarn, three-channel ring spinning device and control method thereof |
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