EP3327183B1 - Rotor spinning method and device for five-sliver asynchronous inputting and three-level carding - Google Patents
Rotor spinning method and device for five-sliver asynchronous inputting and three-level carding Download PDFInfo
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- EP3327183B1 EP3327183B1 EP15901884.5A EP15901884A EP3327183B1 EP 3327183 B1 EP3327183 B1 EP 3327183B1 EP 15901884 A EP15901884 A EP 15901884A EP 3327183 B1 EP3327183 B1 EP 3327183B1
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- yarn
- carding
- roller
- linear density
- components
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
- D01H4/30—Arrangements for separating slivers into fibres; Orienting or straightening fibres, e.g. using guide-rolls
- D01H4/32—Arrangements for separating slivers into fibres; Orienting or straightening fibres, e.g. using guide-rolls using opening rollers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Description
- The present invention relates the field of rotor spinning in the textile industry.
- The basic principle of the rotor spinning yarn is that the sliver is fed through the trumpet and is held by feeding plate and a feeding roller. The feeding roller rotates to feed the sliver to the carding area. The sliver is opened and stripped, carded separately and mixed by the carding roller, which rotates at a high speed in the carding area, so that the sliver becomes single fibers which are separated and arranged parallel to each other. The single fibers enter into a fiber transport channel. Under the action of air flow, the fiber flows into the rotor through the fiber transport channel. With the centrifugal force of the rapidly rotating rotor, the fibers in the groove are further piled up and mixed, and then the fibers are jointed with the mother-yarn and twisted by a navel to form a yarn.
- In the Patent "Rotor spinning melange yarn forming method and device and product (Application No.
CN201410190891.1 CN201420229715.X - At present, the patent "Method and equipment for rotor spun slub yarn" (patent number
CN00137211.4 ) can achieve invariable blending ratio but the linear density changes during the rotor spinning process. The principle of the patent is that the asynchronous motor and the stepper motor drive feeding roller through the differential, screw and worm wheel. The stepper motor, under the control of the intelligent controller, performs the following operations: reducing from high speed to low speed; continuing to run for a period of time; accelerating to high speed; continuing to run for a period of time, and the rotor spins a segment of slub yarn. The patent can produce a yarn with variable densities but cannot change blending ratios of the yarn. - The production of the yarn with the linear density and blending ratio both changed, requires not only that the feeding amount of the two or more of the fed roving can be controlled separately on line, but also that the total amount of the fed roving can be controlled when the feeding amount of the roving is changed. There is no prior art that discloses the production of such yarn. The main problem of the existing rotor spinning technology which can produce the yarn having an invariable linear density and blending ratio is that it is impossible to blend two or more fibers in any proportion during the rotor spinning process.
- The following patent/patent application documents relate to rotor spinning method:
D1CN103938322 A , is to provide a rotor spun yarn blending method, using the same or different, and two or more fiber strands are fed at the same feed speed or a different location in the same straight line density carding and twisting means, by opening, carding, mixed, agglomerated with twisted, made of color segments or rotor spinning yarn segment color mixing. - D2
CN 104790074 A , is to provide a synchronous five different components drawn yarn count line dynamic regulation and regulation of the blending ratio, colorful and multicolored little slub yarns spun. - D3
EP 1564318 A2 , relates to the method of sliver feeding in production of fancy yarn on spindle-less rotor machines with sliver feeding by a feed roller to the stripping roller, stripping individual fibres from the sliver that are consequently used at the spinning rotor for yarn spinning plus spinning units for this method performance. - D4
EP 1352998 A2 , relates to a feed roller for a spinning apparatus with a work area for providing a first textile material for a spinning element as well as an opening device for a spinning apparatus having a rotatably mounted in a housing opening roller and a feed device for feeding a sliver to the opening roller. - In order to solve the above problem, the present invention improves the structure of the conventional rotor spinning machine. A device for implementing a rotor spinning method with three-level carding and multi-component feeding, includes a spinning system and a computer control system. The spinning system comprises a feeding and carding mechanism, a collecting and twisting mechanism, and a winding mechanism. The device is characterized in that the feeding and carding mechanism comprises five combined feeding rollers with rotational freedom degrees, and a three-level carding roller. The speed ratio of the five combined feeding rollers with rotational freedom degree can be adjusted. The collecting and twisting mechanism include a fiber transport channel, a rotor, and a yarn guider. The winding mechanism includes a couple of guide rollers and a winding mechanism. The computer control system includes a PLC programmable controller, a servo driver, and a servo motor. The five combined feeding rollers with rotational freedom degrees and the three-level carding roller are driven by the servo motor. The combined feeding rollers with five rotational freedom degrees comprises a shaft, a bearing, a hollow shaft, a first gear, a second gear, a third gear, a fourth gear, a fifth gear, a washer, a first movable roller, a second movable roller, a third movable roller, a fourth movable roller, and a fifth movable roller. The first to fifth gears and the first to fifth movable rollers rotate around the same axis. The first to fifth gears respectively drive the first to fifth movable rollers. The three-level carding roller comprises the first carding roller, the second carding roller and the third roller that are arranged in parallel. The rotation speed of the three-level carding roller is progressively increased from the first level to the third level. The rotation speed of the first carding roller is 1500-3000 rpm, the rotation speed of the second carding roller is 3000-6000 rpm, and the rotation speed of the third carding roller is 6000-12000 rpm. The density of carding needles of the three-level carding roller progressively increases from the first carding roller to the third carding roller.
- The other objective of the present invention is to provide a rotor spinning method using the above device. The method includes cotton feeding, carding, collecting and twisting, guide and winding. The method is characterized in that combined feeding rollers with five rotational freedom degrees are used in the fiber feeding to feed the fiber into the carding area asynchronously, and three-level carding roller is used in the carding process.
- With the combined rollers and the three-level carding roller configured in the present invention, five slivers (or five different raw material slivers, or five kinds of colored slivers, hereinafter referred to as five components) can be asynchronously fed into the rotor spinning and carding area through the combined feeding rollers. After opening, carding, orienting, separating and mixing by the three-level carding roller, the five slivers are gradually combed into bundle fibers and further combed into single fibers. Under the action of centrifugal force and air flow, a continuous flow comprised by single fibers released and transferred from the carding roller enters into the rotor rotating at a high speed. In the rotor, the fiber flow, under the centrifugal force, is collected together into a sliver again, and then twisted by the navel, and then guided by the guide roller to form the rotor spinning yarn. In the process of spinning, the servo driving system is controlled by a computer program to feed five slivers asynchronously to the carding area by feeding rollers having five freedom degrees. By controlling the feeding amount and feeding ratio of the five feeding rollers, it is possible to dynamically configure the final yarn density of the rotor spinning and the blending ratio of the five components to produce slub yarn, segment-color yarn, segment-color slub yarn, and mélange yarn.
- The speed of the first carding roller is low, so that it is ensured that when the plurality of the slivers with great difference are fed, the total number of carding fibers of each sliver carded by the carding roller are within a reasonable range, thereby reducing damage to the fiber. The speed of the second carding roller is higher than that of the first carding roller. After being carded by the second carding roller, the longitudinal orientation of the fiber is optimized, horizontal transfer mixing of the fiber is further optimized. The third carding roller is a high-speed carding roller. The fiber, after being carded by the third carding roller, obtains not only a better carding and transfer, but also the transport speed is improved, thereby meeting the requirement of centrifugal force for entering the fiber transport channel. Therefore, the fiber can smoothly and orderly go into the rotor to form yarns. Through the multi-level stripping, opening, cleaning, carding, separating and transferring, the large-scale drafting function where the slivers are combed into web, which is then combed into bundles of fibers, which are then separated as single fibers is successfully completed, which enhances the function of the carding area of the rotor spinning, providing flexibility, high efficiency, and high yield.
(2) Based on the mechanical innovation design, the present invention constructs the corresponding mathematical model of spinning and the algorithm of the program. Through the mechatronic servo control system, the random control of the linear density and blending ratio of the rotor spinning yarn are achieved. In specific embodiments, the four kinds of spinning yarns are shown as following: - ① a yarn with invariable linear density and variable blending ratio, such as gradient-color or segment-color yarn with an invariable linear density segment;
- ② a yarn with invariable blending ratio and variable linear density, such as slub yarn, big-belly yarn, dot yarn;
- ③ a yarn with variable linear density and variable blending ratio, such as segment-color slub yarn, segment-color big-belly yarn, segment-color dot yarn;
- ④ a yarn with invariable linear density and invariable blending ratio but mixed with any proportion of blended yarn or color-mixed yarn.
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FIG.1 is a flowchart of the rotor spinning. -
FIG.2 is a diagram of the carding and drafting process of the rotor spinning method with three-level carding roller. -
FIG.3 is a diagram showing the transmission of the feeding roller, wherein 3b is the right-side view of 3a. -
FIG.4 is a structural view of the combined feeding roller. -
FIG.5 is a diagram of a spinning control system with five components asynchronous fed and carded. -
FIG.6 is a diagram of a control model of a rotor spinning yarn system with five components asynchronous input.- 1-1, 1-2, 1-3: carding roller; 1-4, 1-5: trash ejection port; 1-6: feeding roller; 1-7: sliver; 1-8: compression spring; 1-9: feeding plate; 1-10: fiber transport channel; 1-11: navel; 1-12: rotor; 1-13: degassing hole; 1-14, 1-15: guide roller, 1-16: yarn;
- 2-6, 2-7, 2-8, 2-9, 2-10: feeding roller; 2-1, 2-2, 2-3, 2-4, 2-5: sliver; 2-11: feeding plate; 2-12, 2-13, 2-14: carding roller; 2-15: fiber flow; 2-16: rotor; 2-17: yarn;
- 3a-5, 3a-6, 3a-7, 3a-8, 3a-9: rollers; 3a-1, 3a-2, 3a-14, 3a-15, 3a-16: gears; 3a-3, 3a-4, 3a-10, 3a-11, 3a-12: idler gear; 3a-13: roller shaft; 3a-17, 3a-18, 3a-19: carding roller, 3a-20: spun yarn, 3b-1: gear; 3b-2: roller; 3b-3, 3b-4, 3b-5, 3b-6, 3b-7: gears;
- 4-1, 4-2, 4-3, 4-4, 4-5: rollers; 4-6, 4-7, 4-13, 4-14, 4-17: gears; 4-8, 4-12, 4-16: key; 4-9: fixed shaft sleeve; 4-10: screw; 4-11: bearing; 4-15: shaft. Five movable roller (4-1, 4-2, 4-3, 4-4, 4-5) are driven by the gears (4-6, 4-7, 4-13, 4-14, 4-17) respectively.
- The meaning of the formula used in the text:
- Voi: linear velocity of the feeding
roller 1; V02: linear velocity of the feedingroller 2; V03: linear velocity of the feedingroller 3; V04: linear velocity of the feedingroller 4; V05: linear velocity of the feedingroller 5; V1: the linear velocity of the cardingroller 1; V2: the linear velocity of the cardingroller 2; V3: the linear velocity of the cardingroller 3; V4: the linear speed of the rotor; V5: the linear velocity of the guide roller. - ρ1: linear density of sliver A (g / m)
- ρ2: linear density of sliver B (g / m)
- ρ3: linear density of sliver C (g / m)
- ρ4: linear density of sliver D (g / m)
- ρ5: linear density of sliver E (g / m)
- ρ: yarn density (g / m);
- ρ11: linear density of the sliver A passing through the carding roller 1 (g / m)
- ρ12: linear density of the sliver A passing through the carding roller 2 (g / m)
- ρ13: linear density of the sliver A passing through the carding roller 3 (g / m)
- ρ14: linear density of the sliver A in the rotor (g / m)
- ρ21: linear density of the sliver B passing through the carding roller 1 (g / m)
- ρ22: linear density of the sliver B passing through the carding roller 2 (g / m)
- ρ23: linear density of the sliver B passing through the carding roller 3 (g / m)
- ρ24: linear density of the sliver B in the rotor (g / m)
- ρ31: linear density of the sliver C passing through the carding roller 1 (g / m)
- ρ32: linear density of the sliver C passing through the carding roller 2 (g / m)
- ρ33: linear density of the sliver C passing through the carding roller 3 (g / m)
- ρ34: sliver C linear density in the rotor (g / m)
- ρ41: linear density of the sliver D passing through the carding roller 1 (g / m)
- ρ42: linear density of the sliver D passing through the carding roller 2 (g / m)
- ρ43: linear density of the sliver D passing through the carding roller 3 (g / m)
- ρ44: linear density of the sliver D in the rotor (g / m)
- ρ51: linear density of the sliver E passing through the carding roller 1 (g / m)
- ρ52: linear density of the sliver E passing through the carding roller 2 (g / m)
- ρ53: linear density of the sliver E passing through the carding roller 3 (g / m)
- ρ54: linear density of the sliver D in the rotor (g / m)
- E1: draft ratio of the carding
roller 1 to the feeding roller; - E2: draft ratio of the carding
roller 2 to the cardingroller 1; - E3: draft ratio of the carding
roller 3 to the cardingroller 2; - E4: draft ratio of the rotor to the carding
roller 3; - E5: draft ratio of the guide roller to the rotor;
- E: total draft ratio of rotor spinning, which is equal to the draft ratio of guide roller to feeding roller.
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Subscripts - As to feeding a plurality of the slivers, when the feeding speeds of feeding rollers are greatly different, the fiber holding time of each component is also greatly different. In the rotor spinning with single carding roller, due to the need of balancing the stripping /carding fibers, as well as the requirement of the fiber speed when transferring to the fiber transport channel, the rotation speed of the single carding roller is high. Therefore, when there is a significant difference in feeding amount, the number of times that a fiber of the five slivers is carded will be significantly different, and the more the fiber experiences carding, larger will be the damage to this fiber.
- In order to solve the problem of the rotation speed of the carding roller against the damage to fiber and the even mixture of fibers, the present invention adopts the form of three-level carding rollers, that is, the first carding roller, the second carding roller and the third carding roller. The rotation speed of the first carding roller (ω = 1500-3000rpm) is relatively low, the needle density is also relatively low; the working angle of the needle is relatively small. It is mainly configured for stripping, opening, cleaning and carding and focusing on making the total carding number of fibers of each sliver within a reasonable range, thereby reducing damage to the fiber. The speed of the second carding roller (ω = 3000-6000rpm) is mainly configured for stripping, carding, and transferring fibers, wherein the needle density is larger than the needle density of the first carding roller, and the working angle of the needle is relatively larger than that of the first carding roller. After being carded by the second carding roller, the longitudinal orientation of the fiber is optimized, and horizontal transfer mixing of the fiber is further optimized. The third carding roller is a high-speed carding roller (ω =6000-12000 rpm), which is mainly configured for stripping, carding and separating, and transferring fibers, wherein the needle density is larger than the needle density of the second carding roller, and the working angle of the needle is largest. Fibers passing through the third carding roller gets better carding and transfer. Furthermore, due to the high speed of the third carding roller, under the action of centrifugal force and air flow, a highly separated and continuous fiber flow passes through the fiber transport channel and enters orderly into the rotor to form yarns.
- Through the stripping, opening, cleaning, carding, and transfer of the three-level carding roller, the large-scale drafting function, where the slivers are combed into web, which is then combed into fiber bundles, which are separated into single fibers, is successful completed, which enhances the function of the carding area of the rotor spinning, meets the special requirements for the carding of multiple slivers asynchronously feeding into the rotor spun unit. The effects of flexibility, high efficiency, and high yield are realized.
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- Mixed configuration is gradient to realize different color scheme.
- By changing V01, V02, V03, V04, and V05, the blending ratio (color mixing ratio) of different fibers (different colors) in the yarn can be changed under the condition that V0 is kept invariable, so that k1, k2, k3, k4, and k5 are changed between 0 ∼ 100%. In various color mixing modes of five primary colors, the minimum increment of the color mixing ratio is 0.1, wherein the color scheme is as follows:
Table 1 color scheme Blending Modes Color number Monochromatic mode A, B, C, D, E 5 Double-color mixing mode AB, AC, AD, AE, BC, BD, BE, CD, CE, DE 9∗10=90 Tricolor mixing mode ABC, BCD, CDE, DEA, EAB 36∗5= 180 Four-color mixing mode ABCD, BCDE, CDEA, DEAB, EABC 82∗5=410 Five-color mixing mode ABCDE color mixture 28∗3-2=82 Total 767 - Note: k1+k2+k3+k4+k5 = 100% can have numerous combinations. Based on the five primary colors (five kinds of color slivers) by coupling and drafting, color alternating, gradient color matching, twisting and mixture, numerous color schemes can be formed. In addition, it is possible to form a segment-color yarn having a variety of color distribution in the yarn.
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- From the absolute increment of the linear density and relative increment of the linear density, it can be found that the change of yarn linear density, which totally depends on the V01+ΔV01, V02+ΔV02, V03+ΔV03, V04+ΔV04, V05+ΔV05, can have 11 different patterns. Therefore, there can be 11 kinds of yarn in different forms.
- 1. A yarn with variable linear density, wherein one component of the yarn has variable linear density and other components of the yarn have invariable linear densities.
- 2. A yarn with two components having variable linear density and other components having invariable linear densities.
- 3. A yarn with three components having variable linear density and other components having invariable linear densities.
- 4. A yarn with four components having variable linear density and other components having invariable linear densities.
- 5. A yarn with variable linear density, wherein all components of the yarn have variable linear densities.
- 6. A yarn with variable linear density, wherein one component of the yarn is continuous and other components of the yarn are discontinuous.
- 7. A yarn with variable linear density, wherein two components of the yarn are continuous and other components of the yarn are discontinuous.
- 8. A yarn with variable linear density, wherein three components of the yarn are continuous and other components of the yarn are discontinuous.
- 9. A yarn with variable linear density, wherein four components of the yarn are continuous and other components of the yarn are discontinuous.
- 10. A yarn with variable linear density, wherein five components of the yarn are continuous and have variable linear densities.
- 11. The method of dynamic feed speed control of spun yarn
Because
Then:
Claims (15)
- A rotor spinning method for five-sliver asynchronous inputting and three-level carding, comprising:1) feeding fiber (2-15) by five combined feeding rollers (2-6, 2-7, 2-8, 2-9, 2-10) with five rotational freedom degrees into carding area where a three-level carding roller comprising three carding rollers (2-12, 2-13, 2-14) is used for carding;2) moving the five combined feeding rollers (2-6, 2-7, 2-8, 2-9, 2-10) at linear speeds V01, V02, V03, V04, and V05, respectively; moving a rotor (2-16) at a linear speed V4 and moving a guide roller (1-14, 1-15) at a linear speed V5; setting linear densities of five slivers (2-1, 2-2, 2-3, 2-4, 2-5) drafted by the five combined feeding rollers (2-6, 2-7, 2-8, 2-9, 2-10) to be ρ1, ρ2, ρ3, ρ4 and ρ5, respectively, and setting a rotor spun yarn density to be p, such that a draft ratio of a rotor spinning yarn is as below:3) blending ratios of the five slivers (2-1, 2-2, 2-3, 2-4, 2-5) in the rotor spinning yarn (2-17) are K1, K2, K3, K4, and K5, respectively:4) assuming that the speed V5 of the guide roller is invariable, the variables of feeding speeds V01, V02, V03, V04 and V05 of the five combined feeding rollers (2-6, 2-7, 2-8, 2-9, 2-10) of the five slivers (2-1, 2-2, 2-3, 2-4, 2-5) are respectively as follows: V01' = V01 + ΔV01, V02' = V02 + ΔV02, V03' = V03 + ΔV03, V04' = V04 + ΔV04, V05' = V05 + ΔV05, then the dynamic linear density of the rotor spun yarn (2-17) is obtained according to formula (8)5) assuming that ρ1 = ρ2 = ρ3 = ρ4 = ρ5 = ρ0, V01+V02+V03+V04+V05 = V0, obtaining a reference blending ratio according to the formulas (3), (4), (5), (6), (7) as
- The method according to claim 1, characterized in that: assuming ρ1 = ρ2 = ρ3 = ρ4 = ρ5 = ρ0, V01 + V02 + V03 + V04 + V05 = V0, obtaining a dynamic change rate of the rotor spun yarn density according to formulas (2) and (8):
- The method according to claim 2, characterized in that:
- The method according to claim 2, characterized in that:
- The method according to claim 2, characterized in that:
- The method according to claim 2, characterized in that:
- The method according to claim 2, characterized in that: in control method of dynamic feeding speed of the yarn, ΔV0 = ΔV01 + ΔV02 + ΔV03 + ΔV04 + ΔV05, change of the speed is derived from ΔV01, ΔV02, ΔV03, ΔV04 or ΔV05 and determined by the blending ratio, and then ΔV01 = K'1(V0+ΔV)-V01, ΔV02 = K'2(V0+ΔV)-V02, ΔV03 = K'3(V0+ΔV)-V03, ΔV04 = K'4(V0+ΔV)-V04, ΔV05 = K'5(V0+ΔV) -V05.
- A device for realizing the method according to any one of the preceding claims, comprising a spinning system and a computer control system, wherein the spinning system comprises a feeding and carding mechanism, a collecting and twisting mechanism, and a winding mechanism, wherein the feeding and carding mechanism comprises five combined feeding rollers (2-6, 2-7, 2-8, 2-9, 2-10) having five rotational freedom degrees , a three-level carding roller comprising three carding rollers (2-12, 2-13, 2-14); wherein a speed ratio of fiver rollers of the five combined feeding rollers (2-6, 2-7, 2-8, 2-9, 2-10) with five rotational freedom degrees are adjusted, the collecting and twisting mechanism includes a fiber transport channel, a rotor (2-16), and a guide device; the winding mechanism includes a guide and winding mechanism; the computer control system includes a PLC programmable controller, a servo driver, a servo motor; wherein the five combined feeding rollers (2-6, 2-7, 2-8, 2-9, 2-10) with five rotational freedom degrees and the three-level carding roller (2-12, 2-13, 2-14) are driven by the servo motor.
- The device according to claim 14, characterized in that the five combined feeding rollers (2-6, 2-7, 2-8, 2-9, 2-10) with five rotational freedom degrees comprise a shaft (4-15), a bearing (4-11), a hollow shaft (4-9), a first gear (4-6), a second gear (4-7), a third gear(4-13), a fourth gear (4-14), a fifth gear (4-7), a washer, a first movable roller (4-1), a second movable roller (4-2), a third movable roller (4-3), a fourth movable roller (4-4), a fifth movable roller (4-5), wherein the first to fifth gears and the first to fifth movable rollers (4-1, 4-2, 4-3, 4-4, 4-5) are rotated around the same axis, the first to fifth gears (4-6, 4-7, 4-13, 4-14, 4-17) drive the first to fifth movable rollers (4-1, 4-2, 4-3, 4-4, 4-5), respectively.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN201510521024.6A CN105113066B (en) | 2015-08-21 | 2015-08-21 | The asynchronous input of five slivers and the revolving cup spinning method and device of three fractions comb |
PCT/CN2015/000735 WO2017031610A1 (en) | 2015-08-21 | 2015-10-30 | Rotor spinning method and device for five-sliver asynchronous inputting and three-level carding |
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EP3327183A1 EP3327183A1 (en) | 2018-05-30 |
EP3327183A4 EP3327183A4 (en) | 2018-09-05 |
EP3327183B1 true EP3327183B1 (en) | 2019-07-10 |
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CN108570731A (en) * | 2018-05-04 | 2018-09-25 | 江南大学 | Eight component independence feed-type drawing frames |
CN110117857B (en) * | 2019-05-29 | 2024-05-07 | 江南大学 | Multi-channel hollow spindle fancy twisting device and interactive asymmetric twisting method |
CN114792363B (en) * | 2022-04-19 | 2023-07-11 | 江南大学 | Full-color domain gridding color mixing model construction method and color spinning method for three-primary-color fiber construction |
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2015
- 2015-08-21 CN CN201510521024.6A patent/CN105113066B/en active Active
- 2015-10-30 WO PCT/CN2015/000735 patent/WO2017031610A1/en active Application Filing
- 2015-10-30 EP EP15901884.5A patent/EP3327183B1/en not_active Not-in-force
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CN105113066A (en) | 2015-12-02 |
CN105113066B (en) | 2018-02-16 |
EP3327183A4 (en) | 2018-09-05 |
WO2017031610A1 (en) | 2017-03-02 |
EP3327183A1 (en) | 2018-05-30 |
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