A method for producing a multi-colored yarn

Abstract

The application discloses a production method of multi-color yarn, white cotton sliver is prepared by white cotton carding and combing unit, color cotton sliver is prepared by color cotton carding and combing, white combed sliver and color combed sliver are prepared by carding the two kinds of sliver respectively, six white combed slivers and six color combed slivers are prepared by mixing and drawing, and the multi-color sliver is prepared. The back roller pair of the mixing and drawing machine is provided with a selected feeding roller pair including a selected feeding lower roller and a rubbered roller, a roller sleeve is connected to the roller shaft of the selected feeding lower roller through a magnetic controllable transmission connecting piece, the transmission connection control between the roller sleeve and the roller shaft is realized through the magnetic control of the electromagnet, a supporting disc is arranged at the back of the back roller pair which is matched in the middle of each roller sleeve, the selected feeding of the white combed sliver and the color combed sliver is realized, and then the production of the multi-color sliver with different color effects is realized, so that the production of the multi-color yarn with more uniform color distribution is realized, the yarn variety is enriched, and the yarn added value is improved.

Description

Technical Field

[0001] This invention relates to the field of novel yarn technology, and in particular to a method for producing multicolored yarn. Background Technology

[0002] With the development of society and the economy, and the continuous improvement of people's living standards, consumers are increasingly focusing on the fashion and functionality of clothing textiles, in addition to comfort. They seek unique styles and various functions, such as antibacterial and antistatic properties. To meet this consumer demand, continuously developing new yarns and fabrics has become an important task for the textile industry. With the advancement of science and technology, competition in the textile market is becoming increasingly fierce. To maximize profits, manufacturers are constantly moving towards higher-end, higher-quality, more technologically advanced, and higher-value-added products.

[0003] Variegated yarn, or even multi-colored yarn, is a fancy yarn with different color distributions. Its structure is highly distinctive and it can be combined with other novel spinning methods to create fabrics with unique appearances and properties, satisfying the demand for novel and unique yarns in fabrics and apparel. Multi-colored yarn is now widely used in clothing, decorative items, and other products, and is increasingly favored by consumers, possessing strong market competitiveness and development value. Summary of the Invention

[0004] The purpose of this invention is to provide a method for producing multicolored yarn. By selectively feeding white combed cotton slivers and colored combed cotton slivers during the drawing process, multicolored cotton slivers with different color effects can be produced, thereby achieving the production of multicolored yarn with a more uniform color distribution.

[0005] This invention provides a method for producing multicolored yarn. White raw cotton fibers are processed into white carded slivers through a combing and cleaning process. Colored cotton fibers are processed into colored carded slivers through opening, cleaning, and carding. The white and colored carded slivers are then separately prepared and combed to produce white and colored combed slivers, respectively. Six white and six colored combed slivers are then mixed and drawn to produce a multicolored yarn. A selective feed roller pair is provided at the rear of the drafting roller in the mixed and drawn sliver process. The selective feed roller pair includes a lower selective feed roller and an upper selective feed roller. The lower selective feed roller includes a solid roller shaft, on which 12 roller sleeves are sequentially mounted. Each roller sleeve is magnetically connected to the roller shaft. A controllable transmission connector is connected to the roller shaft, which is driven by a motor. The selectable feed roller includes a solid roller shaft, on which 12 roller sleeves are sequentially mounted. Each roller sleeve is connected to the roller shaft via a bearing. Six white combed cotton slivers and six colored combed cotton slivers are spaced apart and fed in by pressing between the roller sleeves and their corresponding roller sleeves. The selective feeding of white and colored combed cotton slivers is achieved by opening and closing the magnetically controllable transmission connector, resulting in multi-colored cotton slivers with controllable color effects. The resulting multi-colored cotton slivers are then processed through two drawing processes to obtain multi-colored cotton slivers with improved evenness. Finally, they are processed through roving and spinning to produce the desired multi-colored yarn. The key feature is that:

[0006] A transmission connection groove is provided on the outer side of the middle part of the roller shaft at each roller sleeve position, so that...

[0007] The roller shaft is divided into two parts: a normal roller shaft on the left and right sides and a recessed roller shaft in the middle. The diameter of the recessed roller shaft is half the diameter of the normal roller shaft, and its length is one-third the length of the normal roller shaft. A transmission connection groove is provided on the inner surface of the middle part of the roller sleeve, thus dividing the roller sleeve into two parts: a normal roller sleeve on the left and right sides and a recessed roller sleeve in the middle. The inner diameter of the recessed roller sleeve is 1.2 times the inner diameter of the normal roller sleeve. The roller sleeve is fitted onto the roller shaft, with the normal roller sleeve and the normal roller shaft maintaining a smooth and tight fit, and the recessed roller sleeve and the recessed roller shaft being aligned. A magnetically controllable transmission connector is provided in the area between the recessed roller sleeve and the recessed roller shaft. The magnetically controllable transmission connector includes a first transmission connector and a second transmission connector with identical structures. The first transmission connector and the second transmission connector are... The device includes a telescopic rod, a telescopic spring, and an electromagnet. The telescopic rod is a freely extendable structure. One end of the telescopic rod is fixedly connected to the inner side of the recessed roller shaft. An electromagnet is installed on the other end of the telescopic rod and is controlled by an electromagnetic switch. A telescopic spring is fitted on the telescopic rod, and both ends of the telescopic spring are fixedly connected to the inner side of the recessed roller sleeve and the electromagnet, respectively. A support plate is installed at the rear of the rear roller pair, which is directly opposite the middle part of each roller sleeve. The support plate includes a support base plate. The rear and front sides of the support base plate are straight. The left side of the support base plate is an arc convex to the right, and the right side is an arc convex to the left. A left gathering piece is fixedly connected to the left side of the support base plate, and a right gathering piece is fixedly connected to the right side. An extension piece is fixedly connected to the front side of the support base plate and extends into the jaws between the rear lower roller and the rear upper rubber roller.

[0008] In the above-described method for producing multicolored yarn, preferably, the electromagnet has an arc-shaped structure.

[0009] In the method for producing multicolored yarn described above, preferably, the length of the recessed roller sleeve is equal to the length of the normal roller sleeve.

[0010] In the method for producing multicolored yarn as described above, preferably, the center of the cross-section of the concave roller shaft is located at the point of connection between the first transmission connector and the second transmission connector.

[0011] In the method for producing multicolored yarn described above, preferably, each of the electromagnetic switches is communicatively connected to a programmable logic controller.

[0012] In the production method of multicolored yarn described above, preferably, the roller shaft is driven by a motor, and the electromagnetic switch has two states: on and off. When the electromagnetic switch is in the off state, the electromagnet loses its magnetism, the telescopic spring is in a naturally extended state without external force, and a certain distance is maintained between the electromagnet and the recessed roller shaft. Correspondingly, the roller sleeve and the roller shaft are in a sliding connection. At this time, the rotation of the roller shaft cannot drive the roller sleeve to rotate. When the electromagnetic switch is in the on state, the electromagnet is magnetic and is attracted to the recessed roller shaft. The roller sleeve and the roller shaft are in a transmission connection. At this time, the rotation of the roller shaft drives the roller sleeve to rotate synchronously.

[0013] In the above-described method for producing multicolored yarn, preferably, six white combed cotton slivers and six colored combed cotton slivers are arranged at intervals and fed into the roller sleeves by pressing between each roller sleeve and the corresponding rubber roller sleeve, such that the roller sleeves are divided into white cotton slivers fed into the roller sleeves and colored cotton slivers fed into the roller sleeves, including the production of multicolored cotton slivers with fixed color distribution and the production of multicolored cotton slivers with random color distribution.

[0014] In the method for producing multicolored yarn described above, preferably, for the production of multicolored cotton sliver with a fixed color distribution, the required quantity of colored combed cotton sliver and the required quantity of white combed cotton sliver are selected as needed, and the total quantity of colored and white combed cotton sliver is 6. Then, the electromagnetic switch of the magnetically controllable transmission connector of the feeding roller sleeve, which is consistent with the required quantity of white combed cotton sliver, is randomly selected to be in the open state, thereby realizing the feeding of the corresponding quantity of white combed cotton sliver. At the same time, the magnetic switch of the feeding roller sleeve, which is consistent with the required quantity of colored combed cotton sliver, is randomly selected to be in the open state. When the electromagnetic switch of the controllable transmission connector is in the open state, a corresponding number of colored combed cotton slivers are fed in. The fed white and colored combed cotton slivers are held by the corresponding support plates and enter the drafting system. After being drafted and thinned by the drafting system, they are recombined to obtain a multi-colored cotton sliver with a fixed color distribution. When the white or colored combed cotton sliver changes from the feeding state to the stopped feeding state, the continuously rotating rear lower roller and the rear upper rubber roller break the cotton sliver at the nip. The broken cotton sliver continues to be held by the support plate and the extension plate, preparing for the next selection and feeding of the cotton sliver.

[0015] To improve the evenness of the produced multicolored cotton slivers, while keeping the number of white combed cotton slivers fed in constant, the electromagnetic switch of the magnetically controllable transmission connector of the feeding roller sleeve is randomly selected to be in the "on" state after a certain set time interval, while keeping the number of colored combed cotton slivers fed in constant, and the electromagnetic switch of the magnetically controllable transmission connector of the feeding roller sleeve is randomly selected to be in the "on" state after a certain set time interval. This achieves random variation in the number of colored and white combed cotton slivers fed in while keeping the color distribution of the produced multicolored cotton slivers constant, resulting in a more random combination of coarse and fine details within each of the fed colored and white combed cotton slivers.

[0016] In the method for producing multicolored yarn described above, preferably, for the production of multicolored slivers with random color distribution, the required quantity of colored combed slivers and the required quantity of white combed slivers are randomly selected, with the total quantity of colored and white combed slivers being 6. Then, the electromagnetic switch of the magnetically controllable transmission connector of the white sliver feeding roller sleeve, which is consistent with the required quantity of white combed slivers, is randomly selected to be in the "on" state, thus feeding in the corresponding quantity of white combed slivers. Simultaneously, the electromagnetic switch of the magnetically controllable transmission connector of the colored sliver feeding roller sleeve, which is consistent with the required quantity of colored combed slivers, is randomly selected to be in the "on" state, thus feeding in the corresponding quantity of colored combed slivers. The fed white and colored combed slivers are then driven together by the aforementioned... After the stretching system stretches and thins the cotton, it is re-combined to obtain multicolored cotton slivers with random color distribution. Then, after a certain set time interval, the required number of colored combed cotton slivers and the required number of white combed cotton slivers are randomly selected again, with the total number of colored and white combed cotton slivers being 6. Then, white cotton slivers that are consistent with the required number of white combed cotton slivers are randomly selected and fed into the electromagnetic switch of the magnetic controllable transmission connector of the roller sleeve, which is in the open state. Colored cotton slivers that are consistent with the required number of colored combed cotton slivers are randomly selected and fed into the electromagnetic switch of the magnetic controllable transmission connector of the roller sleeve, which is in the open state. This achieves random variation in the number of colored and white combed cotton slivers fed in, and thus random variation in the color distribution effect of the resulting multicolored cotton slivers.

[0017] Compared with the prior art, the present invention sets up a selective feeding roller pair, including a selective feeding lower roller and a selective feeding upper roller, at the rear of the drafting system of the mixing and drawing frame. A roller sleeve is connected to the roller shaft of the selective feeding lower roller via a magnetically controllable transmission connector. The transmission connection between the roller sleeve and the roller shaft is controlled by the magnetic control of the electromagnet of the magnetically controllable transmission connector. In addition, a support plate is set at the rear of the rear roller pair directly opposite the middle part of each roller sleeve to achieve selective feeding of white combed cotton sliver and colored combed cotton sliver, thereby realizing the production of multi-colored cotton sliver with different color effects. This results in the production of multi-colored yarn with more uniform color distribution, enriching the yarn varieties and increasing the added value of the yarn. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the connection structure between the roller shaft and the roller sleeve of the feeding lower roller provided in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1 - Roller shaft, 2 - Normal roller shaft, 3 - Recessed roller shaft, 4 - Roller sleeve, 5 - Normal roller sleeve, 6 - Recessed roller sleeve, 7 - First transmission connector, 8 - Second transmission connector, 9 - Telescopic rod, 10 - Telescopic spring, 11 - Electromagnet. Detailed Implementation

[0020] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] This invention provides a method for producing multicolored yarn. White raw cotton fibers are processed into white carded slivers through a combing and cleaning process. Colored cotton fibers are processed into colored carded slivers through opening, cleaning, and carding. The white and colored carded slivers are then separately prepared and combed to produce white and colored combed slivers, respectively. Six white and six colored combed slivers are then mixed and drawn to produce a multicolored yarn. A selective feed roller pair is provided at the rear of the drafting roller in the mixed and drawn sliver process. The selective feed roller pair includes a lower selective feed roller and a top selective feed roller. The lower selective feed roller includes a solid roller shaft 1, on which 12 roller sleeves 4 are sequentially mounted. Each roller sleeve 4 is connected to a magnetically controllable transmission connector. The roller shaft 1 is connected to the motor-driven roller shaft 4, which is a solid roller shaft. Twelve roller sleeves are sequentially fitted onto the roller shaft, each sleeve connected to the roller shaft via bearings. The roller sleeves can rotate freely along the roller shaft. Six white combed cotton slivers and six colored combed cotton slivers are alternately arranged and fed in by pressing between each roller sleeve 4 and the corresponding roller sleeve. The selective feeding of white and colored combed cotton slivers is achieved by opening and closing a magnetically controllable transmission connector, thereby controlling the color effect of the resulting cotton sliver. The resulting multicolored cotton sliver is then processed through two drawing processes to obtain a multicolored cotton sliver with improved evenness. Finally, it is processed through roving and spinning to obtain the desired multicolored yarn. The process includes the following steps:

[0022] Step 1: Cotton blending: Select high-grade, milky-white, silky-sheen, long, uniform, soft, strong, moderately mature, and low-impurity white and colored raw cotton fibers. Select white raw cotton fibers with a main body length of 30.89mm, short fiber rate of 9.66%, maturity of 1.67, and breaking strength of 3.8cN / dtex. Select colored raw cotton fibers with a main body length of 29.45mm, short fiber rate of 10.89%, maturity of 1.66, and breaking strength of 3.68cN / dtex.

[0023] Step 2: White raw cotton cleaning and carding, colored raw cotton opening and cleaning, and carding: For white raw cotton, the selected white raw cotton fibers are sequentially passed through a reciprocating cotton grabber to grab them according to the required blending ratio. During the grabbing process, the cotton grabber beaters tear the fibers to achieve initial opening and mixing of the raw cotton fibers. A metal spark detector removes metal impurities and sparks from the grabbed raw cotton fibers. A heavy-duty separator separates and removes lumpy impurities from the raw cotton fibers. The cotton stream is then conveyed to the opener by the condenser on a dual-axial flow opener equipped with a condenser. The raw cotton fibers are torn and transferred between the two roller beaters of the opener. During the transfer process, the raw cotton fibers and the loosened and impurities fall and are removed. Finally, the cotton stream is conveyed to the multi-compartment blending machine through the cotton conveying pipeline. In each cotton bin, cotton fibers are randomly dropped into the bin, resulting in random mixing of different cotton fibers. The raw cotton fibers are then output from the bin and merged. During the conveying process, the raw cotton fibers are opened and impurities are removed. Due to the positional relationship of each cotton bin, the conveying path of the raw cotton fibers in each bin is different, resulting in random mixing of various cotton fibers at the merging point. The cotton cleaner further opens and removes impurities from the raw cotton fibers, thus obtaining raw cotton fiber bundles. The raw cotton fiber bundles enter the carding machine with a feeding box through the cotton conveying pipeline. In the feeding box, the raw cotton fibers are evenly laid out and directly fed into the cotton conveying machine. In the cotton conveying machine, they undergo thorough and meticulous opening, carding, impurity removal, and sliver forming, thus producing white carded slivers.

[0024] For colored raw cotton, the selected colored raw cotton fibers are sequentially grasped by a reciprocating cotton grasper according to the required blending ratio. During the grasping process, the fibers are initially loosened and mixed by the tearing action of the cotton grasping beaters. A metal impurity removal device separates and removes metal block impurities from the grasped colored raw cotton fibers. The colored raw cotton fibers are then conveyed and initially loosened and mixed by the pre-mixing process in the cotton condenser. The colored cotton fibers are then conveyed and condensed by the 3-roller cotton opener in the cotton condenser. The incoming colored cotton fibers are then transferred and torn between the 3 roller beaters of the cotton opener to loosen the fibers. During the transfer process, impurities in the colored cotton fibers fall off and are removed. The colored cotton flows through the cotton conveying pipeline to the 6 cotton bins of the multi-bin blending machine. The cotton fibers randomly fall into the cotton bins to achieve random mixing of various cotton fibers. Finally, the colored cotton fibers are... The colored cotton fibers are output from and converged within the cotton bins. During the conveying process, the colored cotton fibers are opened and impurities are removed. Due to the positional relationship of each cotton bin, the conveying paths of the colored cotton fibers in each bin are different, resulting in random mixing of various colored cotton fibers at the convergence point. The colored cotton fibers are conveyed and condensed by the porcupine cotton opener of the cotton condenser. The conveyed colored cotton fibers are then finely opened and impurities are removed by the porcupine cotton opener. Then, the colored cotton fiber stream is distributed as needed by the electric cotton distributor. The distributed colored cotton fibers are conveyed and condensed by the cotton box of the cotton condenser. The conveyed colored cotton fibers are evenly laid in the cotton box to obtain a uniform colored cotton fiber layer. The colored cotton fiber layer is opened, impurities are removed, and evenly formed by the lap forming machine to obtain a uniform colored cotton lap. The obtained colored cotton lap is finely opened, combed, impurities are removed, and slivered by the carding machine to obtain a strip-shaped colored carded sliver.

[0025] Step 3: Combing: The white carded sliver is processed through the first pre-drawing and sliver-winding process to obtain a white cotton lap. The white cotton lap is then processed through the first combing process to obtain a white combed cotton sliver. The colored carded sliver is processed through the second pre-drawing and sliver-winding process to obtain a colored cotton lap. The colored cotton lap is then processed through the second combing process to obtain a colored combed cotton sliver. In the first pre-drawing process, a drawing frame is used. Six white carded slivers are fed in together. These six white carded slivers are drawn and thinned by the drawing frame's drafting system and then re-combined to obtain a white cotton pre-drawing sliver with improved evenness and fiber straightness. The prepared white cotton pre-drawing sliver is divided into three groups and fed into the sliver drawing and lap winding machine. Each group includes 16-20 white cotton pre-drawing slivers. The white cotton pre-drawing slivers of each group are fed in by guide rollers, and then undergo a small drafting process by guide plates and drafting devices to form a white cotton web. After the three layers of white cotton web are output, they are rotated 90 degrees by curved guide plates and lapped on a platform. Finally, they are pressed by pressure rollers and wound into a white cotton roll by cotton roll rollers. The white cotton roll is then combed by a combing machine to remove short fibers, thereby producing a white combed cotton sliver with a more uniform fiber length distribution.

[0026] In the second pre-drawing process, a drawing frame is used. Eight colored carded slivers are fed in together. These eight slivers are drawn and thinned by the drawing system of the drawing frame and then re-drawn to produce a colored cotton pre-drawn sliver with improved evenness and fiber straightness. Since the tensile strength of colored cotton fibers is slightly lower than that of white cotton fibers, eight colored carded slivers are fed in together to reduce damage to the colored cotton fibers during drawing. The resulting colored cotton pre-drawn sliver is then fed into a sliver lap machine, using 16-24 colored cotton pre-drawn slivers. Guided by guide rollers and guide pressure rollers, the fed colored cotton pre-drawn sliver... The colored cotton slivers are rotated 90° on the V-shaped platform and then arranged and combined in parallel. After being rotated and combined, the colored cotton pre-drawing slivers are guided by the guide rollers and enter the drafting device for a small drafting process to obtain the colored cotton layer. The drafted colored cotton layer is pressed by the pressure rollers to prevent sticking. The colored cotton layer is then driven by the cotton sliver rollers to make colored cotton slivers. The resulting white cotton slivers are then combed by the combing machine to remove short fibers, thereby producing colored combed cotton slivers with a more uniform fiber length distribution. The combing process follows the process principles of "heavy preparation, less sticking, precise timing and positioning, balanced cotton drop, reduced eye difference, heavy pressure, and accurate engagement".

[0027] Step 4: Blending and Drawing: The resulting white combed cotton sliver and colored combed cotton sliver are blended and drawn together to produce a multi-colored cotton sliver with controllable color distribution. The drawing frame for blending and drawing includes a drafting system, which includes a rear roller pair, a middle roller pair, and a front roller pair. The rear roller pair includes a rear lower roller and a rear upper rubber roller. The middle roller pair includes a middle lower roller and a middle upper rubber roller. The front and rear roller pairs include a front lower roller and a front upper rubber roller. A selective feed roller pair is located at the rear of the rear roller pair. The selective feed roller pair includes a selective feed lower roller and a selective feed upper rubber roller. (Refer to...) Figure 1As shown, the selected feed roller includes a roller shaft 1, which is a solid cylindrical structure. Hollow roller sleeves are fitted onto the solid roller shaft 1. The roller sleeves consist of 12 identical roller sleeves 4. The roller shaft 1 and roller sleeves 4 are made of the same material. A transmission connection groove is provided on the outer side of the middle portion of the roller shaft 1 at each roller sleeve 4 position, dividing the roller shaft 1 into two normal roller shafts 2 on the left and right sides and a recessed roller shaft 3 in the middle. The diameter of the recessed roller shaft 3 is 1 / 2 the diameter of the normal roller shaft 2, and the length of the recessed roller shaft 3 is 1 / 3 the length of the normal roller shaft 2. A transmission connection groove is provided on the inner side of the middle portion of the roller sleeve 4, dividing the roller sleeve 4 into two normal roller sleeves 5 on the left and right sides and a recessed roller sleeve 6 in the middle. The inner diameter of the recessed roller sleeve 6 is 1 / 3 the inner diameter of the normal roller sleeve 5.The length of the recessed roller sleeve 6 is equal to the length of the normal roller sleeve 5. The roller sleeve 4 is fitted onto the roller shaft 1, ensuring a smooth and tight fit between the normal roller sleeve 5 and the normal roller shaft 2, and ensuring that the recessed roller sleeve 6 and the recessed roller shaft 3 are aligned. A magnetically controllable transmission connector is provided in the area between the recessed roller sleeve 6 and the recessed roller shaft 3. The magnetically controllable transmission connector includes a first transmission connector 7 and a second transmission connector 8 with identical structures. The line connecting the first transmission connector 7 and the second transmission connector 8 drives the transverse direction of the recessed roller shaft 31. The center of the cross-section, the first transmission connector 7 and the second transmission connector 8 include a telescopic rod 9, a telescopic spring 10 and an electromagnet 11. The telescopic rod 9 is a freely telescopic structure. One end of the telescopic rod 9 is fixedly connected to the inner side of the recessed roller shaft 3. An electromagnet 11 is provided on the other end of the telescopic rod 9. The electromagnet 11 has an arc-shaped structure and is controlled by an electromagnetic switch. Each electromagnetic switch is communicatively connected to a programmable logic controller. A telescopic spring 10 is sleeved on the telescopic rod 9. The two ends of the telescopic spring 10 are respectively connected to the inner side of the recessed roller sleeve 6 and the electromagnet 11. 1. A support plate is fixedly connected between the rollers. At the rear of the rear roller pair, directly opposite the middle part of each roller sleeve 4, a support plate includes a support base plate. The rear and front sides of the support base plate are straight lines. The left side of the support base plate is an arc convex to the right, and the right side is an arc convex to the left. A left gathering piece is fixedly connected to the left side of the support base plate, and a right gathering piece is fixedly connected to the right side. An extension piece is fixedly connected to the front side of the support base plate, extending into the jaws between the rear lower roller and the rear upper rubber roller. The roller shaft 1 is driven by a motor. An electromagnetic switch includes an on / off switch. The electromagnetic switch has two states: When the switch is in the off state, the electromagnet 11 loses its magnetism, and the extension spring 10 is in its naturally extended state without external force. A certain distance is maintained between the electromagnet 11 and the recessed roller shaft 3, and the roller sleeve 4 is slidably connected to the roller shaft 1. At this time, the rotation of the roller shaft 1 cannot drive the roller sleeve 4 to rotate. When the switch is in the on state, the electromagnet 11 becomes magnetic and is attracted to the recessed roller shaft 3. The transmission connection between the roller sleeve 4 and the roller shaft 1 is maintained, and the rotation of the roller shaft 1 drives the roller sleeve 4 to rotate synchronously.

[0028] The feed rollers include a roller shaft, which is a solid cylindrical structure. Hollow roller sleeves are fitted onto the solid roller shaft. The roller sleeves consist of 12 identical roller sleeves. The roller shaft is made of iron, and the roller sleeves are made of rubber. Each roller sleeve is connected to the roller shaft through its own bearing. Each roller sleeve can rotate freely along the roller shaft. In use, 6 white combed cotton slivers and 6 colored combed cotton slivers are fed in by pressing between each roller sleeve 4 and the corresponding roller sleeve, which divides the roller sleeve 4 into white cotton sliver feeding roller sleeve 4 and colored cotton sliver feeding roller sleeve 4. This includes the production of multi-colored cotton slivers with fixed color distribution and the production of multi-colored cotton slivers with random color distribution.

[0029] For the production of multi-colored swabs with a fixed color distribution, the required quantity of colored combed swabs and the required quantity of white combed swabs are selected as needed, with a total quantity of 6. Then, the electromagnetic switch of the magnetically controllable transmission connector of the white swab feeding roller sleeve 4, which matches the required quantity of white combed swabs, is randomly selected to be in the "on" state, thereby achieving the feeding of the corresponding quantity of white combed swabs. Simultaneously, the magnetically controllable transmission connector of the colored swab feeding roller sleeve 4, which matches the required quantity of colored combed swabs, is randomly selected. When the electromagnetic switch of the component is in the open state, the corresponding number of colored combed cotton slivers are fed in. The fed white and colored combed cotton slivers are held by the corresponding support plates and enter the drafting system. After being drafted and thinned by the drafting system, they are recombined to obtain a multi-colored cotton sliver with a fixed color distribution. When the white or colored combed cotton sliver changes from the feeding state to the stopped feeding state, the continuously rotating rear lower roller and rear upper rubber roller break the cotton sliver at the nip. The broken cotton sliver continues to be held by the support plate and extension plate, preparing for the next selection and feeding of the cotton sliver.

[0030] Meanwhile, in order to improve the evenness of the produced multicolored cotton sliver, while keeping the number of white combed cotton slivers fed in constant, the electromagnetic switch of the magnetic controllable transmission connector of the feeding roller sleeve 4 is randomly selected to be in the open state after a certain set time interval, while keeping the number of colored combed cotton slivers fed in constant, the electromagnetic switch of the magnetic controllable transmission connector of the feeding roller sleeve 4 is randomly selected to be in the open state after a certain set time interval, while keeping the number of colored combed cotton slivers fed in constant. This achieves random variation in the number of colored and white combed cotton slivers fed in constant while keeping the color distribution of the produced multicolored cotton sliver constant, thereby achieving a more random combination of coarse and fine details in each colored and white combed cotton sliver fed in, and thus improving the evenness of the produced multicolored cotton sliver.

[0031] For the production of multi-colored slivers with random color distribution, the required quantity of colored combed slivers and the required quantity of white combed slivers are randomly selected, with a total quantity of 6. Then, the electromagnetic switch of the magnetically controllable transmission connector of the white sliver feeding roller sleeve 4, which is consistent with the required quantity of white combed slivers, is randomly selected to be in the "on" state, thus achieving the feeding of the corresponding quantity of white combed slivers. Simultaneously, the electromagnetic switch of the magnetically controllable transmission connector of the colored sliver feeding roller sleeve 4, which is consistent with the required quantity of colored combed slivers, is randomly selected to be in the "on" state, thus achieving the feeding of the corresponding quantity of colored combed slivers. The fed white and colored combed slivers are then drawn and thinned together by the drawing system. The cotton strips are re-merged to obtain a randomly distributed multicolored cotton strip. Then, after a set time interval, the required number of colored combed cotton strips and the required number of white combed cotton strips are randomly selected again, with a total of 6 colored and white combed cotton strips. Then, the electromagnetic switch of the magnetic controllable transmission connector of the feeding roller sleeve 4, which is consistent with the required number of white combed cotton strips, is turned on. The electromagnetic switch of the magnetic controllable transmission connector of the feeding roller sleeve 4, which is consistent with the required number of colored combed cotton strips, is turned on, thereby achieving random variation in the number of colored and white combed cotton strips fed in, and thus achieving random variation in the color distribution effect of the resulting multicolored cotton strip.

[0032] Step 5: Finishing and Drawing: The multicolored cotton sliver obtained in Step 4 is finished and drawn in two stages to produce multicolored cotton sliver with improved evenness. The first finishing and drawing stage uses a drawing frame, in which 6 multicolored cotton slivers are fed in together. After being drawn together, the 6 multicolored cotton slivers are stretched and thinned, and then gathered to produce a multicolored cotton semi-finished sliver with improved evenness. The second finishing and drawing stage uses a drawing frame, in which 6 multicolored cotton semi-finished slivers are fed in together. After being drawn together, the 6 multicolored cotton semi-finished slivers are stretched and thinned, and then re-drawn to produce a multicolored cotton sliver with improved evenness. The finishing and drawing process adopts the process principles of "appropriate spacing, stable grip, strong control, uniform stretching, smooth stretching, multiple folding, heavy pressure, light quantity, large spacing, low speed, and anti-winding".

[0033] Step 6: Roving: The multicolored cotton sliver obtained in Step 5 is stretched and thinned by the drafting system of the roving frame, and twisted and wound by the twisting system to produce multicolored cotton roving with a certain strength. A spindle roving frame is selected. The roving process adopts the process design principle of "light weight, large spacing, heavy pressure, large twist, small tension, central axial and radial winding density, small elongation, small back zone drafting, small nip, and appropriate collector diameter". The fed multicolored cotton sliver is stretched in the drafting system of the roving frame. During the stretching process, the fibers in the multicolored cotton sliver slip against each other, and during the slippage process, the fibers are... Due to the elasticity of the fibers, random transfer of fibers occurs, resulting in random mixing of white and colored cotton fibers. This further leads to uniform mixing of the two fibers, resulting in a more uniform color distribution in the produced multi-colored cotton roving. The multi-colored cotton sliver obtained by the drafting system is twisted by the twisting system of the roving frame to obtain multi-colored cotton roving with a certain strength. During the twisting process, the fibers within the multi-colored cotton sliver undergo mutual transfer, resulting in a further random mixing of white and colored cotton fibers, thereby improving the uniformity of the color distribution in the produced multi-colored cotton roving.

[0034] Step 7: Spinning: The two multicolored cotton rovings obtained in Step 6 are stretched and thinned by the drafting system of the spinning machine, and twisted and wound by the twisting system to produce multicolored cotton fine yarn with a certain strength. A ring spinning machine is selected, and the spinning process adopts the process design principle of "large spacing, medium twist, heavy pressure, medium elasticity and medium hardness rubber rollers, medium speed, small back zone drafting, small nip, and suitable temperature and humidity". The fed multicolored cotton roving is stretched in the drafting system of the spinning machine. During the stretching process, the fibers in the multicolored cotton roving slip against each other, and during the slippage process, due to the elasticity of the fibers... Random fiber transfer occurs, resulting in random mixing of white and colored cotton fibers, which further leads to uniform mixing and a more uniform color distribution in the resulting multicolored cotton yarn. The multicolored cotton sliver obtained by the drafting system is twisted by the twisting system of the spinning machine to obtain multicolored cotton yarn with a certain strength. During the twisting process, the fibers in the multicolored cotton sliver undergo mutual transfer, resulting in a further random mixing of white and colored cotton fibers, which improves the uniformity of the color distribution in the resulting multicolored cotton yarn.

[0035] Taking the preparation of multicolored yarn with a linear density of 9.7 tex as an example, the corresponding process parameters are as follows:

[0036] (1) Raw material selection

[0037] White raw cotton

[0038]

[0039]

[0040] Colored raw cotton

[0041]

[0042] (2) Spinning process:

[0043] White cotton fiber: JWF1012 reciprocating cotton grabber → AMP3000 metal Mars probe → TF50 heavy object separator → FA051 condenser + FA103B twin-axis flow cotton opener → JWF1026 multi-bin cotton blender → JWF1124C cotton cleaner → FA151 dust remover → TF2202A cotton blending tee → JWF1171 cotton feeder → JWF1204B carding machine + TF2513 coiler → JWF1312 pre-drawing frame → E32 sliver drawing and lap sizing machine → E65 combing machine

[0044] Colored cotton fiber: JWF1012 reciprocating cotton picker → AMP3000 metal Mars probe → TF50 heavy separator → FA051 condenser + FA109 three-roller opener → JWF1026 multi-bin blender → FA106 porcupine opener → FA141A single beater lap machine → JWF1204B carding machine + TF2513 coiler → JWF1312 pre-drawing frame → E32 sliver drawing and lap machine → E65 combing machine

[0045] Blending: Modified JWF1312 drawing frame (blended drawing) → JWF1312 drawing frame → JWF1312 drawing frame → THC2015 roving frame → TH598 spinning frame

[0046] (3) Design of key process parameters

[0047] Cleansing and combing couplet:

[0048] Cotton grabber process parameter design

[0049]

[0050] Cotton opener process parameter design

[0051]

[0052] Carding process design table

[0053]

[0054] Fine comb:

[0055] Combing process design table

[0056]

[0057]

[0058] Parallelism:

[0059] In the mixed drawing process, two types of multi-colored slivers are produced: one with a fixed color distribution and the other with a random color distribution. For the production of multi-colored slivers with a fixed color distribution, the required number of colored combed slivers and the required number of white combed slivers are both 3, with an interval of 5 seconds. For the production of multi-colored slivers with a random color distribution, within one cycle, the required number of colored combed slivers increases from 0 to 6, while the corresponding number of white combed slivers decreases from 6 to 0, with an interval of 4 seconds between each change. The specific process design is as follows:

[0060] Drawing process design table

[0061]

[0062]

[0063] Coarse yarn:

[0064]

[0065] Fine yarn:

[0066]

[0067] (4) Yarn quality

[0068] Meanwhile, 9.7 tex pure cotton combed yarn was processed using the selected white cotton fibers, and its quality was compared with that of the multicolored yarn processed by this patent. The test results are as follows:

[0069] Yarn evenness test

[0070]

[0071]

[0072] Yarn strength test

[0073]

[0074] The test results clearly show that, due to the use of lower-strength colored cotton fibers in this patent, the strength and strength CV of the colored yarn produced by this patent are lower than those of white cotton yarn. However, the evenness CV and yarn defects, including fine details, thick spots, and knots, are comparable to those of white cotton yarn. This is because this patent uses selective feeding roller pairs, which achieves precise selective feeding of colored and white cotton slivers, thereby enabling the production of colored yarn with excellent yarn forming effect.

[0075] The above description, based on the embodiments shown in the figures, details the structure, features, and effects of the present invention. The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or equivalent embodiments modified to have equivalent changes, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A method for producing multicolored yarn, comprising: producing white carded sliver from white raw cotton fibers through a combing and cleaning process; producing colored carded sliver from colored cotton fibers through opening, cleaning, and carding processes; producing white combed sliver and colored combed sliver from white combed sliver and colored combed sliver from colored combed sliver respectively through their respective combing processes; producing multicolored sliver from six white combed slivers and six colored combed slivers through a blending and drawing process; wherein a selective feed roller pair is provided at the rear of the drafting roller in the blending and drawing process, the selective feed roller pair including a selective feed lower roller and a selective feed upper roller; the selective feed lower roller including a solid roller shaft, on which 12 roller sleeves are sequentially fitted, each roller sleeve being magnetically controllable. The transmission connector is connected to the roller shaft, which is driven by a motor. The selective feeding roller includes a solid roller shaft, on which 12 roller sleeves are sequentially mounted. Each roller sleeve is connected to the roller shaft via a bearing. Six white combed cotton slivers and six colored combed cotton slivers are spaced apart and fed in by pressing between the roller sleeves and their corresponding roller sleeves. The selective feeding of white and colored combed cotton slivers is achieved by opening and closing the magnetically controllable transmission connector, resulting in multi-colored cotton slivers with controllable color effects. The resulting multi-colored cotton slivers are then processed through two drawing processes to obtain multi-colored cotton slivers with improved evenness. Finally, they are processed through roving and spinning to produce the desired multi-colored yarn. The key feature is: A transmission connection groove is provided on the outer side of the middle part of the roller shaft at each roller sleeve position, so that... The roller shaft is divided into two parts: a normal roller shaft on the left and right sides and a recessed roller shaft in the middle. The diameter of the recessed roller shaft is half the diameter of the normal roller shaft, and its length is one-third the length of the normal roller shaft. A transmission connection groove is provided on the inner surface of the middle part of the roller sleeve, thus dividing the roller sleeve into two parts: a normal roller sleeve on the left and right sides and a recessed roller sleeve in the middle. The inner diameter of the recessed roller sleeve is 1.2 times the inner diameter of the normal roller sleeve. The roller sleeve is fitted onto the roller shaft, with the normal roller sleeve and the normal roller shaft maintaining a smooth and tight fit, and the recessed roller sleeve and the recessed roller shaft being aligned. A magnetically controllable transmission connector is provided in the area between the recessed roller sleeve and the recessed roller shaft. The magnetically controllable transmission connector includes a first transmission connector and a second transmission connector with identical structures. The first transmission connector and the second transmission connector are... The device includes a telescopic rod, a telescopic spring, and an electromagnet. The telescopic rod is a freely extendable structure. One end of the telescopic rod is fixedly connected to the inner side of the recessed roller shaft. An electromagnet is installed on the other end of the telescopic rod and is controlled by an electromagnetic switch. A telescopic spring is fitted on the telescopic rod, and both ends of the telescopic spring are fixedly connected to the inner side of the recessed roller sleeve and the electromagnet, respectively. A support plate is installed at the rear of the rear roller pair, which is directly opposite the middle part of each roller sleeve. The support plate includes a support base plate. The rear and front sides of the support base plate are straight. The left side of the support base plate is an arc convex to the right, and the right side is an arc convex to the left. A left gathering piece is fixedly connected to the left side of the support base plate, and a right gathering piece is fixedly connected to the right side. An extension piece is fixedly connected to the front side of the support base plate and extends into the jaws between the rear lower roller and the rear upper rubber roller.

2. The method for producing multicolored yarn according to claim 1, characterized in that, The electromagnet has an arc-shaped structure.

3. The method for producing multicolored yarn according to claim 1, characterized in that, The length of the concave roller sleeve is equal to the length of the normal roller sleeve.

4. The method for producing multicolored yarn according to claim 1, characterized in that, The center of the cross-section of the concave roller shaft connecting the first transmission connector and the second transmission connector.

5. The method for producing multicolored yarn according to claim 1, characterized in that, Each of the electromagnetic switches is communicatively connected to a programmable logic controller.

6. The method for producing multicolored yarn according to claim 1, characterized in that, The roller shaft is driven by a motor. The electromagnetic switch has two states: on and off. When the electromagnetic switch is off, the electromagnet loses its magnetism, and the telescopic spring is in its natural extended state without external force. A certain distance is maintained between the electromagnet and the recessed roller shaft, and the roller sleeve is slidably connected to the roller shaft. At this time, the rotation of the roller shaft cannot drive the roller sleeve to rotate. When the electromagnetic switch is on, the electromagnet becomes magnetic and is attracted to the recessed roller shaft. The roller sleeve is connected to the roller shaft, and the rotation of the roller shaft drives the roller sleeve to rotate synchronously.

7. The method for producing multicolored yarn according to claim 1, characterized in that, The six white combed cotton slivers and the six colored combed cotton slivers are arranged at intervals and fed into the roller sleeves and the corresponding rubber roller sleeves by pressing, so that the roller sleeves are divided into white cotton slivers fed into the roller sleeves and colored cotton slivers fed into the roller sleeves, including the production of multi-colored cotton slivers with fixed color distribution and the production of multi-colored cotton slivers with random color distribution.

8. The method for producing multicolored yarn according to claim 7, characterized in that, For the production of multi-colored swabs with a fixed color distribution, the required quantity of colored combed swabs and the required quantity of white combed swabs are selected as needed, with a total quantity of 6. Then, the electromagnetic switch of the magnetically controllable transmission connector of the white swab feeding roller sleeve, which matches the required quantity of white combed swabs, is randomly selected to be in the "on" state, thereby achieving the feeding of the corresponding quantity of white combed swabs. Simultaneously, the electromagnetic switch of the magnetically controllable transmission connector of the colored swab feeding roller sleeve, which matches the required quantity of colored combed swabs, is randomly selected to be in the "on" state. When the magnetic switch is in the open state, the corresponding number of colored combed cotton slivers are fed in. The fed white and colored combed cotton slivers are held by the corresponding support plates and enter the drafting system. After being drafted and thinned by the drafting system, they are recombined to obtain a multicolored cotton sliver with a fixed color distribution. When the white or colored combed cotton sliver changes from the feeding state to the stopped feeding state, the continuously rotating rear lower roller and the rear upper rubber roller break the cotton sliver at the nip. The broken cotton sliver continues to be held by the support plate and the extension plate, preparing for the next selection and feeding of the cotton sliver. To improve the evenness of the produced multicolored cotton slivers, while keeping the number of white combed cotton slivers fed in constant, the electromagnetic switch of the magnetically controllable transmission connector of the feeding roller sleeve is randomly selected to be in the "on" state after a certain set time interval, while keeping the number of colored combed cotton slivers fed in constant, and the electromagnetic switch of the magnetically controllable transmission connector of the feeding roller sleeve is randomly selected to be in the "on" state after a certain set time interval. This achieves random variation in the number of colored and white combed cotton slivers fed in while keeping the color distribution of the produced multicolored cotton slivers constant, resulting in a more random combination of coarse and fine details within each of the fed colored and white combed cotton slivers.

9. The method for producing multicolored yarn according to claim 7, characterized in that, For the production of multi-colored slivers with random color distribution, the required quantities of colored combed slivers and white combed slivers are randomly selected, with a total quantity of 6. Then, the electromagnetic switch of the magnetically controllable transmission connector of the white sliver feeding roller sleeve, matching the required quantity of white combed sliver, is randomly selected to be in the "on" state, thus feeding in the corresponding quantity of white combed sliver. Simultaneously, the electromagnetic switch of the magnetically controllable transmission connector of the colored sliver feeding roller sleeve, matching the required quantity of colored combed sliver, is randomly selected to be in the "on" state, thus feeding in the corresponding quantity of colored combed sliver. The fed white and colored combed slivers are then drawn and thinned together by the drafting system and then recombined. A multicolored cotton swab with random color distribution is obtained. Then, after a set time interval, the required number of colored combed cotton swabs and the required number of white combed cotton swabs are randomly selected again, with a total quantity of 6 colored and white combed cotton swabs. Then, white cotton swabs consistent with the required number of white combed cotton swabs are randomly selected and fed into the electromagnetic switch of the magnetic controllable transmission connector of the roller sleeve, which is in the open state. Similarly, colored cotton swabs consistent with the required number of colored combed cotton swabs are randomly selected and fed into the electromagnetic switch of the magnetic controllable transmission connector of the roller sleeve, which is in the open state. This achieves random variation in the quantity of colored and white combed cotton swabs fed in, resulting in random variation in the color distribution effect of the obtained multicolored cotton swabs.

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