CN106149111A - Triple channel asynchronous drawing-off Compact Spinning yarn feeding device, colour-spun yarns three primary colours color blending effect regulation and control method and colour mixture section coloured yarn - Google Patents

Abstract

The invention relates to a three-channel asynchronous drafting cluster spinning device, a method for regulating and controlling the mixed color effect of three primary colors of melange yarn, and a color-mixed colored yarn, and is characterized in that it comprises a three-channel asynchronous drafting device, a three-channel yarn guide device and a three-channel Gathering device; the three-channel asynchronous drafting device includes a combined rear roller, a middle roller and a front roller, and the combined rear roller is composed of independently driven first rear rollers, second rear rollers and third rear rollers; the three-channel accumulation The device includes a special-shaped tube with three channels of collecting grooves, and three channels of collecting grooves are arranged on the surface of the special-shaped tube of the three channels of collecting grooves. The present invention fixes the positions of the intersection and twisting points of the three rovings by effectively holding and accumulating the three-channel rovings, and the shape of the twisting triangular area is stable. The present invention adjusts the ratio of the area of each base color fiber in the outer layer of the yarn, so as to adjust the color mixing effect of the color mixing yarn such as hue, lightness and saturation.

Description

Three-channel asynchronous drafting cluster spinning device, three-color mixing effect control of color spinning Method and Color Mixed Segment Colored Yarn

technical field

The invention relates to a three-channel asynchronous drafting cluster spinning device, a method for regulating and controlling the mixed color effect of three primary colors of colored spinning yarn, and a mixed color section colored yarn.

Background technique

Color spun yarn is made by blending short fibers of different colors. It can present natural and bright colors, soft and warm tones, and the fabrics woven have hazy three-dimensional effects, so they are very popular in the market. In recent years, the production technology of dope-dyed chemical fibers (such as colored viscose, colored polyester, colored acrylic and other colored fibers) and the loose fiber dyeing technology of various natural fibers have become increasingly mature, laying a good foundation for the development of color spinning industry. Base. After more than ten years of development, my country has taken the lead in forming a textile product industry chain centered on colored spinning. The upstream involves dope dyed chemical fibers and dyed natural fibers, and the downstream involves clothing and home textiles. Color spinning has become an important textile production method in the wool spinning and cotton spinning fields. The production scale has reached 10 million spindles, and will become an important textile production method in the future.

The production of melange yarn generally adopts processes such as cotton-grabbing and color-mixing, drawing-and-drawing, cotton-grabbing and drawing-mixing, spun yarn multi-component spinning and color-mixing, and double-twisting and color-mixing. Uniform color spun yarn, mixed color uneven color spun yarn, the number of colors of color spun yarn can be divided into two-color color spun yarn, multi-color color spun yarn, and the mixing ratio of color spun yarn can be divided into low-ratio color spun yarn (color fiber ≤ 10%), medium proportion of colored spun yarn (10%≤colored fiber≤40%), high proportion of colored spun yarn (colored fiber≥40%). In the existing color spinning production mode, the mixing of fibers of different colors and the forming of the spun yarn are not carried out in the same process, and the fibers of different colors are mixed first and the yarns are formed later, which leads to the occurrence of fibers of different colors in the yarn. The mixing ratio cannot be adjusted arbitrarily, nor can it be precisely controlled to achieve color. Therefore, in actual production, the color of melange yarn cannot be adjusted arbitrarily, and the distribution of colors cannot be adjusted arbitrarily. This short leg in theory and technology results in the lack of means for the color and pattern design of melange yarn. New product development is very limited.

In view of the above problems, the patent applications in the prior art: "Device and method for blending and color mixing based on three-rove coupling drafting and twisting system (CN201310369692.2)", "Method for producing illusion yarn by mixing three-color rovings And the illusion yarn prepared by this method (CN201410176434.7)", "Drafting and twisting device for three roving independent drafting and synchronous twisting (CN201320516412.1)" and two invention patents and a utility model patent. The three patent applications are controlled by computer programs and servo drives, which can continuously change the mixing ratio of different-colored fibers online, so that they can be randomly distributed along the length of the yarn.

The color (hue, lightness, saturation) of color-spun yarn is the color formed by juxtaposition and mixing of fibers of different colors in space. The blending ratio of fibers, the distribution of colored fibers in the yarn (yarn structure) and its twist are determined. Traditional melange spinning technology cannot arbitrarily adjust the color mixing ratio, so it is not possible to arbitrarily control the color mixing effect of melange spinning. And the patent application "A device and method for blending and color mixing based on three-rove coupling drafting and twisting system (CN201310369692.2)", "Method for producing illusion yarn by mixing three-color roving and illusion yarn prepared by this method (CN201310369692.2)" CN201410176434.7)", "Drafting and twisting device for synchronous twisting and drafting of three rovings independently (CN201320516412.1)", through asynchronous drafting, the blending ratio of colored spun yarns can be adjusted arbitrarily and in real time, so as to realize the blending of colored spun yarns Arbitrary and instant changes in color. Since the two rovings are drafted at different drafting ratios and then merged and twisted at the nip of the front roller, when the thickness of the two strands changes randomly and the difference is large, the twisting point of their intersection will change with the Due to the change of the draft ratio, it is impossible to form a stable twisting triangle. Therefore, on the one hand, the randomness of the distribution of colored fibers is caused, and on the other hand, the actual twist of the yarn is fluctuating and deviates from the theoretical value. Due to the randomness of colored fibers and twist changes, the distribution of colored fibers in the outer layer of the yarn is uncontrollable. We know that the mixing mode of different colors of fibers in color spinning conforms to the juxtaposition and mixing of colors, and the color mixing effect should depend on the area ratio of each base color fiber floating on the surface of the yarn and the distribution of twist. Due to the random movement of the twisting points of multi-channel digital color spinning, the shape of the twisting triangle is unstable, so it is impossible to control the distribution of colored fibers on the surface of the color spinning yarn, so it is impossible to achieve precise control of mixed colors and precise control of mixed color differences , resulting in a large difference between the actual color mixing effect and the theoretical color mixing effect. For example, in CN201310369692.2, CN201410176434.7, CN201320516412.1, after drafting, the twisted triangular shape formed by the strands of the two rovings at the nip of the front roller will change due to the change of the draft ratio of the two rovings. Changes, due to the fluctuation of the ply twisting area of the two strands, the yarn structure changes, resulting in a drastic fluctuation in the area ratio of the distribution of fibers of various colors on the surface of the melange yarn and deviating from the set value, thereby affecting the color mixing effect (including Hue, lightness, saturation) uniformity and stability.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide a three-channel asynchronous drafting bundle spinning device. By effectively holding and gathering the three-channel rovings, when the asynchronous drafting of the three rovings changes randomly, its The position of the intersection twisting point is fixed, and the shape of the twisting triangle is stable.

The invention also provides a method for controlling the color mixing effect of the three primary colors of the melange yarn, by adjusting the ratio of the distribution area of each primary color fiber on the outer layer of the yarn, thereby controlling the color mixing effect of the color melange yarn such as hue, lightness and saturation.

The invention also provides a color-mixed color yarn, which is formed by juxtaposition and mixing of fibers of different colors arranged on the surface layer. The hue, lightness and saturation of the color-mixed yarn can be realized through the ratio of the distribution area of each base color fiber in the outer layer of the yarn. degree of color mixing effect.

According to the technical solution provided by the present invention, the three-channel asynchronous drafting bundle spinning device is characterized in that it includes a three-channel asynchronous drafting device, a three-channel yarn guiding device and a three-channel compacting device;

The three-channel asynchronous drafting device includes combined rear rollers, middle rollers and front rollers, and the combined rear rollers are composed of independently driven first rear rollers, second rear rollers and third rear rollers;

The three-channel accumulation device is located at the output end of the front roller, and includes a grid ring and a three-channel accumulation groove special-shaped tube, and a three-channel accumulation groove is arranged on the surface of the three-channel accumulation groove special-shaped tube, and the three-channel accumulation groove includes three mutual angles. The gathering grooves, the ends of the three gathering grooves meet at the intersection point of the yarn.

Further, the angle between the two adjacent gathering grooves is 6°-8°, the width of the three gathering grooves is 1.2mm-1.5mm, and the width between the head ends of two adjacent gathering grooves is 2.4 ~3mm, the ends of the three collecting grooves are circular arcs with a radius of 1.5~2mm.

Further, the three-channel yarn guide device includes a three-eye rear bell mouth, a three-channel yarn guide and a yarn guide rod; the three-eye rear bell mouth is arranged at the input end of the combined rear roller, and the three-eye rear bell mouth has a Three holes through which three primary color rovings pass; the three-channel yarn guide is arranged between the combined back roller and the middle roller, and the three-channel yarn guide has three passages allowing three primary color rovings to pass through; the yarn guide rod is set Between the middle roller and the front roller, there are three passages on the yarn guide rod.

Further, the length direction of the middle collecting groove of the three collecting grooves is set perpendicular to the axis of the front roller.

Further, a drafting apron is sheathed on the middle roller.

The method for regulating and controlling the color mixing effect of the three primary colors of color spinning is characterized in that the regulation is carried out by using a three-channel asynchronous drafting cluster spinning device, which includes the following steps:

(1) Drive the first rear roller, the second rear roller and the third rear roller to rotate at linear speed V _ha , V _hb , V _hc respectively, the middle roller rotates at linear speed V _z , and the front roller rotates at linear speed V _q ;

(2) In the same color segment, keep the ratio V _ha : V _hb : V _hc of the linear speed of the first back roller, the second back roller and the third back roller constant, then realize the first base color roving, the second base color The draft ratio E _a of the roving and the third primary color roving: E _b : E _c value and the color mixing ratio k _a /k _b /k _c value of the three primary color color spinning yarns are constant;

(3) The three roving strands with constant draft ratio output by the front rollers are intersected at the twisting point by the three-channel accumulating device to form a stable twisting triangular area. The angle θ is constant;

(4) Based on the constant pitch h and helix angle θ in the same color segment, by adjusting the draft ratio of the first primary color roving, the second primary color roving, and the third primary color roving, the three primary colors with multiple color segments are obtained Color spinning, each color segment has a corresponding color mixing ratio.

Further, within the pitch length h of the same color segment, the distribution length of the first base color roving is a=κ _a ×h, the distribution length of the second base color roving is b=κ _b ×h, and the distribution length of the third base color roving is It is c=κ _c ×h.

Further, the area ratio of the three primary color fibers in the surface layer of the three primary color color spun yarn is equal to the color mixing ratio of the three primary color fibers in the color spun yarn.

The segment colored yarn is drawn and twisted to form a plurality of color segments from the first base color fiber, the second base color fiber and the third base color fiber; in the same color segment, the first base color fiber, the second base color fiber and the third base color fiber The pitch h and the helix angle θ of the base color fiber are constant.

Further, the ratio of the areas of the fibers of the first basic color, the fibers of the second basic color and the fibers of the third basic color in the outer layer of the segment colored yarn is equal to the color mixing ratio of the fibers of the first basic color, the fibers of the second basic color and the fibers of the third basic color.

The present invention has the following advantages:

(1) The present invention effectively holds and gathers the three-channel rovings, and when the asynchronous drafting of the three rovings changes randomly, the positions of the intersection and twisting points are fixed, and the shape of the twisting triangle is stable.

(2) The present invention regulates the color mixing effects such as the hue, lightness and saturation of the color mixing yarn by adjusting the ratio of the distribution area of each base color fiber on the outer layer of the yarn.

(3) The color-mixed section color yarn of the present invention is formed by juxtaposing and mixing fibers of different colors arranged on the surface, and the hue, lightness and brightness of the color-mixed yarn are realized through the ratio of the distribution area of each base color fiber in the outer layer of the yarn. Saturation and other color mixing effects.

Description of drawings

Fig. 1 is a schematic structural view of the three-channel asynchronous drafting bundle spinning device of the present invention.

FIG. 2 is a side view of FIG. 1 .

Fig. 3 is a schematic diagram of the three-channel accumulation tank.

Fig. 4 is a schematic diagram of the cross-sectional structure of the yarn formed by the spinning of the three-channel asynchronous drafting and cluster spinning device.

Fig. 5 is a schematic diagram of the outer peripheral surface of the yarn formed by the spinning of the three-channel asynchronous drafting and cluster spinning device.

Fig. 6 is a color spinning model based on a three-channel asynchronous drafting and cluster spinning device with three primary colors juxtaposed and mixed colors.

detailed description

The present invention will be further described below in conjunction with specific drawings and embodiments and embodiments.

Embodiment one:

As shown in Figure 1 and Figure 2, the three-channel asynchronous drafting bundle spinning device of the present invention includes a three-channel asynchronous drafting device, a three-channel yarn guiding device and a three-channel gathering device; the three-channel asynchronous drafting device Including combined rear rollers, middle rollers 9 and front rollers 12, combined rear rollers are composed of independently driven first rear rollers 5, second rear rollers 6 and third rear rollers 7, middle rollers 9 are covered with drafting aprons 10 The three-channel yarn guide device includes three-eye rear bell mouth 4, three-channel yarn guide 8 and yarn guide rod 11; the three-eye rear bell mouth 4 is arranged on the input end of the combined rear roller, and the three-eye rear bell mouth There are three holes on the 4 that allow the passage of the three primary color rovings; the three-channel yarn guide 8 is arranged between the combined back roller and the middle roller 9, and the three-channel yarn guide 8 has three passages that allow the passage of the three primary color rovings ; The yarn guide rod 11 is arranged between the middle roller 9 and the front roller 12, and the yarn guide rod 11 has three passages.

As shown in Figures 1 and 2, the three-channel accumulation device is located at the output end of the front roller 12, and includes a grid ring and a three-channel accumulation groove special-shaped tube 13, and three accumulation grooves are arranged on the surface of the three-channel accumulation groove special-shaped pipe 13 A, B, C (as shown in Figure 3), the ends of the three collecting grooves meet at point D, the middle collecting groove B is perpendicular to the axis of the front roller 12, and the angle between two adjacent collecting grooves is 6° ~8°, the widths a, b, and c of the three collecting grooves are all 1.2mm~1.5mm, the width between two adjacent collecting grooves is 2.4~3mm, and the ends of the three collecting grooves are arcs with a radius of 1.5~2mm The function of the three-channel gathering groove is to control the three roving strands output by the front roller 12 to meet at point D at a certain angle and gather into a sliver. Point D is also the twisting point of the ring spindle device. Due to the balance between the holding control of the gathering groove and the spinning tension of the yarn, no matter whether the linear density of the three rovings changes randomly or not, the converging point of the three rovings and the angles at which they wrap and twist each other will not change.

The feeding path of the three rovings is as follows: the second basic color roving 2 in the middle passes through the middle hole of the three-eye bell mouth 4, the second rear roller 6, the middle channel of the three-channel yarn guide 8, the drafting apron 10, the guide The middle channel of the yarn bar 11, the front roller 12, and the middle accumulating groove B of the three-channel accumulating grooves enter the twisting area. The first basic color roving 1 on the left passes through the left hole of the three-eye bell mouth 4 along a straight line, the first back roller 5, reaches the left channel of the three-channel yarn guide 8, advances to the left channel outlet along the left channel, Then pass through the left side channel of the drafting apron 10, the yarn guide bar 11, the left side accumulation groove A of the front roller 12, the three passageway accumulation grooves along a straight line, and enter the twisting area. The third basic color roving 3 on the right passes through the right hole of the three-eye bell mouth 4 along a straight line, the third rear roller 7, reaches the right channel of the three-channel yarn guide 8, advances along the right channel to the right channel outlet, Then pass through the right channel of the drafting apron 10, the yarn guide rod 11, the right side accumulating groove C of the front roller 12, the three channel accumulating groove along a straight line, and enter the twisting area. Before entering the twisting area, the three rovings advance along their independent channels and are gradually drawn and thinned. After entering the twisting area, the three rovings pass through the three-channel accumulation grooves and are twisted into yarns. At this time, the three rovings in the twisting area The fiber strands of the components are stable in the transverse position of the twisting zone, and are twisted into the yarn in a stable form.

The principle of the control method for the color mixing effect of the three primary colors of color spinning is described below.

Let the linear densities of the first base color roving 1, the second base color roving 2, and the third base color roving 3 be ρ _a , ρ _b , ρ _c respectively, the yarn density of the colored spinning yarn ρ _y , and the color mixing ratios be k _a , k _b , k _c , corresponding to the draft ratios of the three rovings are E _a , E _b , E _c , twist N _Z , spindle speed _ND , middle roller speed V _Z , three rear roller speeds V _ha , V _hb , V _hc .

1. Draft ratio E _a , E _b , E _c :

${\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; a</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; a</span>}}}{{\mathrm{<span\; class="notranslate">\; \&kappa;</span>}}_{\mathrm{<span\; class="notranslate">\; a</span>}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; the\; y</span>}}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}\mathrm{<span\; class="notranslate">\; a</span>}}}{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; q</span>}}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ;</span>$

${\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}}{{\mathrm{<span\; class="notranslate">\; k</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; the\; y</span>}}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}\mathrm{<span\; class="notranslate">\; b</span>}}}{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; q</span>}}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ;</span>$

${\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}}{{\mathrm{<span\; class="notranslate">\; k</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; the\; y</span>}}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}\mathrm{<span\; class="notranslate">\; c</span>}}}{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; q</span>}}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ;</span>$

2. Speed of front, middle and rear rollers:

Front roller speed

The first back roller speed V _ha = V _q × Ε _a (5);

The second back roller speed V _hb = V _q × Ε _b (6);

The third back roller speed V _hc = V _q × E _c (7);

3. The three back rollers asynchronously feed the three-color roving to control the color mixing ratio of the dyed yarn:

The first base-color roving 1, the second base-color roving 2, and the third base-color roving 3 are respectively fed into three independently driven first rear rollers 5, second rear rollers 6, and third rear rollers through the three holes of the three-eye bell mouth 4. Roller 7 and three nips formed by three back top rollers enter the drafting zone, and through the drafting of middle roller 9 and front roller 12, twisting forms the colored spun yarn of three primary colors mixed colors again. The speeds of the first rear roller 5, second rear roller 6, and third rear roller 7 independently driven by servo motors are V _ha , V _hb , V _hc , and k _a , k _b , and k _c are respectively the first primary color roving 1 , the second base color roving 2, the color mixing ratio of the third base color roving 3 in color spinning, then:

${\mathrm{<span\; class="notranslate">\; k</span>}}_{\mathrm{<span\; class="notranslate">\; a</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}\mathrm{<span\; class="notranslate">\; a</span>}}}{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}\mathrm{<span\; class="notranslate">\; a</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}\mathrm{<span\; class="notranslate">\; b</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}\mathrm{<span\; class="notranslate">\; c</span>}}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; a</span>}}}{{\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; a</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 8</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ;</span>$

${\mathrm{<span\; class="notranslate">\; k</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}\mathrm{<span\; class="notranslate">\; b</span>}}}{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}\mathrm{<span\; class="notranslate">\; a</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}\mathrm{<span\; class="notranslate">\; b</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}\mathrm{<span\; class="notranslate">\; c</span>}}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}}{{\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; a</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 9</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ;</span>$

${\mathrm{<span\; class="notranslate">\; k</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}\mathrm{<span\; class="notranslate">\; c</span>}}}{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}\mathrm{<span\; class="notranslate">\; a</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}\mathrm{<span\; class="notranslate">\; b</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}\mathrm{<span\; class="notranslate">\; c</span>}}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}}{{\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; a</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 10</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ;</span>$

k _a + k _b + k _c = 1 (11);

From the formulas (8), (9), (10), and (11), it can be seen that by changing the drafting ratio of the first primary color roving 1, the second primary color roving 2, and the third primary color roving 3, the color mixing of the three primary colors can be changed. The color mixing ratio of the yarn.

The control method of the melange effect of melange yarn is as follows: the melange effect of melange yarn is formed by the juxtaposition and mixing of different colors of fibers arranged on the surface layer through space. By adjusting the ratio of the distribution area of each base color fiber in the outer layer of the yarn, the color mixing effects such as hue, lightness and saturation of the mixed color yarn can be adjusted.

As shown in Figure 4, it is a schematic diagram of the cross-sectional structure of the yarn formed by the three-channel asynchronous drafting and cluster spinning device, where: α is the central angle of the sector formed by the first primary color roving 1, and β is the second primary color roving 2 The central angle of the sector formed, γ is the central angle of the sector formed by the third primary color roving 3; a is the arc length of the sector formed by the first primary color roving 1, b is the arc length of the sector formed by the second primary color roving 2, c is the arc length of the sector formed by the third primary color roving 3; S _α , S _β , and S _γ are the areas occupied by the fibers of each component in the cross-section of the yarn. As shown in Figure 5, it is a schematic diagram of the outer circumference of the melange spinning yarn, and the areas occupied by the three primary color fibers distributed on the outer layer of the melange spinning cylinder are P _a , P _b , and P _c .

In Fig. 4, the ratio of the area occupied by each component in the yarn cross section is equal to the fiber blending ratio of each component, that is: The area of each sector is: Then the ratio of the arc lengths of the three primary color fibers distributed on the outer circumference of the yarn is equal to the blending ratio of the three primary color fibers in the color spinning yarn, that is: a:b:c=S _α :S _β :S _γ =κ _a :κ _b : κ _c .

As shown in Figure 5, it is a schematic diagram of the outer circumferential surface of the colored spinning yarn. If the length of one twisting cycle (twisting helix pitch) of color spinning is h, then: And h=a'+b'+c';

Let θ be the helix angle of the twisting helix, then: Then it can be drawn that the ratio of the area of the three-color fiber distribution on the yarn surface is equal to the ratio of the width of the three-color fiber distribution, that is, P _a : P _b : P _c =a':b':c'=a:b:c =κ _a :κ _b :κ _c (12).

Formula (12) shows that the path of longitudinal movement of each roving sliver in the process of asynchronous drafting and coaxial twisting and transverse converging twisting are controlled by three-channel yarn guide device, three-channel asynchronous drafting device and three-channel collecting groove The transfer law can ensure that the area ratio of the three primary color fibers on the surface of the color spinning yarn is equal to the blending ratio of the three primary color fibers in the color spinning yarn.

As shown in Figure 6, it is a color spinning model based on a three-channel asynchronous drafting and cluster spinning device with three primary colors juxtaposed and mixed colors. Within a twist pitch length h, the distribution of color fiber A, color fiber B and color fiber C The length is shown in Table 1.

Table 1. Color segment lengths within the twist pitch

Color fiber A distribution length a=κ _a ×h Color fiber B distribution length b=κ _b ×h Color fiber C distribution length _c ＝κc×h Three primary colors A, B, C juxtaposed color mixing effect Depending on P _a :P _b :P _c or a:b:c

Therefore, when producing color-mixed colored yarns based on a three-channel asynchronous drafting cluster spinning device, by adjusting the area P _a : P _b : P _c or the length a: b: c value of each color fiber distribution in the twisting pitch, the It is possible to control the juxtaposition of the color mixing effect of the three primary color fibers in each color segment to form different color mixing segment colored yarns, as shown in Table 2.

Table 2. The color of melange yarn achieved by juxtaposition of three primary color melange yarns

During the spinning process, if the intersection and twisting points of the three roving strands move with the change of the draft ratio, a stable twisting triangle cannot be formed, so that the pitch h and the helix angle θ of the twisting helix are random. On the one hand, the change will cause the randomness of the color fiber distribution, and on the other hand, the actual twist of the yarn will fluctuate and deviate from the theoretical value, then: P _a : P _b : P _c ≠a':b':c'≠ a:b:c≠κ _a :κ _b :κ _c . At this time, the color mixing effect of color spinning is not directly related to the blending ratio of each base color fiber.

The present invention controls the yarn guiding and accumulation of the three roving strands drawn asynchronously to keep the twisting point fixed and the twisting triangular area stable. To control the three primary color fibers juxtaposed color mixing effect. During spinning, the length of the color segments of the three primary colors within the pitch of the twist can be changed online, and different color segment ratios can be used at different times to change the juxtaposition and color mixing effect of the three primary colors to produce mixed color segment colored yarn.

Embodiment two:

Select Xinjiang fine-staple cotton or long-staple cotton, dyed red, yellow, and blue respectively, and produce it into roving according to the carding or combing process. The draft-twisting-winding system feeds rovings of three colors simultaneously to one spinning spindle. The three-channel asynchronous drafting cluster spinning device can perform asymmetrical asynchronous drafting on three rovings according to the color mixing ratio, and the three bundles of whiskers will be gathered through the cluster and the accumulation groove and then twisted to form segmented colored yarns with varying color mixing ratios.

Suppose the roving linear density T _s =350tex, segment color yarn density T _y =25tex, twist N _z =760 twist/meter, spindle speed N _D =7600 rev/min, yarn twisting helical period length h=1/ N _z = 1000/760 = 1.32mm, front roller pull-out line speed V _q = 10 m/min. The implementation steps are as follows:

(1) The color mixing ratio and segment length design of each color segment of the three-color segment colored yarn:

The color mixing ratio of each color segment of segment colored yarn and the length of segment colored yarn are shown in Table 3.

Table 3. Color mixing ratio and segment color yarn length

In Table 3, L is the length of each color segment when the length is equal, t is the stripping time of the front roller of each color segment when the length is equal; L ₁ ~ L ₆₆ is the length of each color segment when the length is different, t ₁ ~ t ₆₆ is different The length corresponds to the stripping time of the front rollers of each color segment.

(2) Draft ratio of each roving:

Assume that the total draft ratios of each roving in the three channels are E _a , E _b , E _c , the draft ratios in the rear area of each channel are E _a1 , E _b1 , E _c1 , and the draft ratios in the front area of each channel are E _b2 , E _b2 , E _c2 , the draft ratio of each roving is shown in Table 4.

Table 4. Ratio of roving at each time period

(3) The distribution length of A and B color fibers in the twist pitch:

Table 5. Distribution length of A, B, and C colored fibers in the twist pitch of each time period

Claims (10)

1. A three-channel asynchronous drafting bundle spinning device, characterized in that it comprises a three-channel asynchronous drafting device, a three-channel yarn guide device and a three-channel gathering device; The three-channel asynchronous drafting device includes combined rear rollers, middle rollers (9) and front rollers (12), and the combined rear rollers are independently driven by first rear rollers (5), second rear rollers (6) and third Back roller (7) is formed; The three-channel gathering device is located at the output end of the front roller (12), and comprises a grid ring and a three-channel gathering groove special-shaped pipe (13). The gathering grooves include three gathering grooves arranged at angles to each other, and the ends of the three gathering grooves meet at the intersection point (D) of the yarns. 2. The three-channel asynchronous drafting and cluster spinning device as claimed in claim 1 is characterized in that: the angle between the two adjacent gathering grooves is 6°～8°, and the width of the three gathering grooves (a , b, and c) are all 1.2 mm to 1.5 mm, the width between the head ends of two adjacent collecting grooves is 2.4 to 3 mm, and the ends of the three collecting grooves are circular arcs with a radius of 1.5 to 2 mm. 3. The three-channel asynchronous drafting bundle spinning device as claimed in claim 1, characterized in that: the three-channel yarn guide device comprises a three-eye rear bell mouth (4), a three-channel yarn guide (8) and a guide Yarn rod (11); the three-eye rear bell mouth (4) is arranged on the input end of the combined rear roller, and the three-eye rear bell mouth (4) has three holes that allow three primary color rovings to pass through; the three-channel guide The yarn device (8) is arranged between the combined rear roller and the middle roller (9), and the three-channel yarn guide (8) has three passages allowing the passage of three primary color rovings; the yarn guide rod (11) is arranged in the middle Between the roller (9) and the front roller (12), there are three passages on the yarn guiding rod (11). 4. The three-channel asynchronous drafting and cluster spinning device as claimed in claim 1, characterized in that: the length direction of the middle accumulating groove (B) of the three accumulating grooves is arranged perpendicular to the axis of the front roller (12). 5. The three-channel asynchronous drafting bundle spinning device according to claim 1, characterized in that: a drafting apron (10) is sheathed on the middle roller (9). 6. A method for regulating and controlling the color mixing effect of three primary colors in color spinning, characterized in that the regulation is carried out by using a three-channel asynchronous drafting cluster spinning device, comprising the following steps: (1) Drive the first rear roller (5), the second rear roller (6) and the third rear roller (7) to rotate at linear speeds V _ha , V _hb , V _hc respectively, and the middle roller (9) rotates at linear speed V _z rotates, and the front roller (12) rotates with the linear velocity V _q ; (2) In the same color segment, keep the ratio V _ha : V _hb : V _hc of the linear speeds of the first rear roller (5), the second rear roller (6) and the third rear roller (7) constant, then Realize the draft ratio E _a : E _b : E _c value of the first base color roving (1), the second base color roving (2) and the third base color roving (3) and the color mixing ratio k _a /k of the three base color spinning yarns The value of _b /k _c is constant; (3) Three roving strands with a constant draft ratio output by the front roller (12) meet at the twisting point by the three-channel accumulating device to form a stable twisting triangular area, and the obtained colored spun yarn has the same pitch in the same color segment. h and the helix angle θ are constant; (4) When the pitch h and the helix angle θ in the same color segment are constant, by adjusting the draft ratio of the first base color roving (1), the second base color roving (2), and the third base color roving (3), A three-primary color spun yarn with multiple color segments is obtained, and each color segment has a corresponding color mixing ratio. 7. The color-spinning three-primary-color mixing effect control method as claimed in claim 6 is characterized in that: within the pitch length h in the same color segment, the distribution length of the first primary-color roving is a=κ _a ×h, and the second The distribution length of the primary color roving is b=κ _b ×h, and the distribution length of the third primary color roving is c=κ _c ×h. 8. The method for regulating and controlling the color mixing effect of three primary colors in color spinning as claimed in claim 6, wherein the ratio of the area of the three primary color fibers on the surface layer of the three color spinning yarns is equal to the color mixing ratio of the three primary color fibers in the color spinning yarn . 9. The mixed-color section colored yarn obtained according to claim 6 is characterized in that: said section colored yarn is formed into a plurality of color sections by drafting and twisting the first base color fiber, the second base color fiber and the third base color fiber; In one color segment, the pitch h and the helix angle θ of the fibers of the first primary color, the second primary color and the third primary color are constant. 10. The mixed color segment colored yarn according to claim 9, characterized in that: the ratio of the areas of the first base color fiber, the second base color fiber and the third base color fiber in the outer layer of the segment color yarn is equal to the first base color fiber, the second base color fiber, and the third base color fiber. The color mixing ratio of the second primary color fiber and the third primary color fiber.