Production method of colorful yarn

Abstract

The invention discloses a production method of colorful yarns, which comprises the following steps of: preparing white carded slivers from white cotton through blowing-carding, preparing colorful carded slivers from colored cotton through opening, cleaning and carding, respectively combing the white carded slivers and the colorful carded slivers to obtain white combed slivers and colorful combed slivers, and mixing and drawing six white combed slivers and six colorful combed slivers to obtain colorful slivers. A selective feeding roller pair comprising a selective feeding lower roller and an upper rubber roller is arranged on the rear portion of a rear roller pair of the mixed drawing frame, a roller shaft of the selective feeding lower roller is connected with a roller sleeve through a magnetic controllable transmission connecting piece, and transmission connection control between the roller sleeve and the roller shaft is achieved through magnetic control of an electromagnet. The supporting disc is arranged on the rear portion of the rear roller pair right opposite to the middle of each roller sleeve in a matched mode, selective feeding of white combed cotton slivers and colorful combed cotton slivers is achieved, then production of colorful cotton slivers with different color effects is achieved, production of colorful yarn with more uniform color distribution is achieved, yarn varieties are enriched, and the additional value of the yarn is improved.

Description

Technical Field

[0001] The invention relates to the technical field of novel yarns, in particular to a method for producing multi-colored yarns. Background Art

[0002] With the development of social economy, people's living standards are constantly improving. For textiles used in clothing, in addition to the pursuit of wearing comfort, people are paying more and more attention to their fashion and functionality, pursuing unique styles and various functions, such as antibacterial and antistatic functions. In order to meet this demand of consumers, it has become an important task for the textile industry to continuously develop new yarns and fabrics. With the development of science and technology, the competition in the textile market is becoming more and more fierce. In order to maximize profits, various manufacturers are constantly developing in the direction of high-end, high-grade, good technical content and high added value.

[0003] Segmented colored yarn or even multi-colored yarn is a kind of fancy yarn with different color distribution. Its structure is very unique and can be combined with other new spinning methods. The fabrics made of it have unique appearance and performance, which meets the requirements of fabrics and clothing for novelty and difference. Multi-colored yarn is now widely used in clothing, decorative items, etc., and is becoming more and more popular. It has strong competitiveness and development value in the market. Summary of the invention

[0004] The purpose of the present invention is to provide a method for producing multi-color yarn, by realizing the selective feeding of white combed cotton slivers and colored combed cotton slivers in the drawing process, so as to realize the production of multi-color cotton slivers with different color effects, and then realize the production of multi-color yarn with more uniform color distribution.

[0005] The invention provides a method for producing multi-color yarn, comprising the steps of preparing white combed cotton strips through a combing and carding process for white raw cotton fibers, preparing colored combed cotton strips through opening, cleaning and carding for colored cotton fibers, preparing white combed cotton strips and colored combed cotton strips through combing preparation and combing, respectively, preparing white combed cotton strips and colored combed cotton strips through combing, preparing multi-color cotton strips through mixing and drawing, and providing a pair of selective feeding rollers at the rear of the drafting rollers of the mixed drawing, the pair of selective feeding rollers comprising a selective feeding lower roller and a selective feeding upper rubber roller, the selective feeding lower roller comprising a solid roller shaft, 12 roller sleeves being sequentially sleeved on the roller shaft, and each roller sleeve being respectively sleeved through a magnetic The controllable transmission connecting piece is connected to the roller shaft, and the roller shaft is driven by a motor. The selective feeding rubber roller includes a solid rubber roller shaft, and 12 rubber roller sleeves are sequentially sleeved on the rubber roller shaft, and each rubber roller sleeve is connected to the rubber roller shaft through a bearing. Six white combed cotton strips and six colored combed cotton strips are arranged at intervals and pressed and fed between each roller sleeve and the corresponding rubber roller sleeve. The selective feeding of white combed cotton strips and colored combed cotton strips is realized by disconnecting and closing the magnetic controllable transmission connecting piece, so as to obtain colorful cotton strips with controllable color effects. The obtained colorful cotton strips are then subjected to two drawing processes to obtain colorful cotton cooked strips with improved strip uniformity, and then the required colorful yarns are obtained through coarse yarn and fine yarn. The invention is characterized in that:

[0006] A transmission connection outer 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 normal roller shafts on the left and right sides and a recessed roller shaft in the middle. The diameter of the recessed roller shaft is 1 / 2 of the diameter of the normal roller shaft, and the length of the recessed roller shaft is 1 / 3 of the length of the normal roller shaft. A transmission connection inner groove is arranged on the inner side surface of the middle part of the roller sleeve, so that the roller sleeve is divided into normal roller sleeves 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 sleeved on the roller shaft, and the normal roller sleeve and the normal roller shaft are kept smoothly and closely, and the recessed roller sleeve and the recessed roller shaft are kept facing each other. A magnetically controllable transmission connecting member is arranged in the area between the recessed roller sleeve and the recessed roller shaft. The magnetically controllable transmission connecting member includes a first transmission connecting member and a second transmission connecting member with the same structure. The first transmission connecting member and the second transmission connecting member include The invention relates to a telescopic rod, a telescopic spring and an electromagnet. The telescopic rod is a freely retractable structure. One end of the telescopic rod is fixedly connected to the inner side surface of the recessed roller shaft. The other end of the telescopic rod is provided with an electromagnet, which is controlled by an electromagnetic switch. A telescopic spring is sleeved on the telescopic rod. The two ends of the telescopic spring are respectively fixedly connected to the inner side surface of the recessed roller sleeve and the electromagnet. A supporting plate is arranged at the rear of the rear roller pair opposite to the middle part of each roller sleeve. The supporting plate comprises a supporting film. The rear side and the front side of the supporting film are both straight lines. The left side of the supporting film is an arc convex to the right, and the right side is an arc convex to the left. A left gathering plate is fixedly connected to the left side of the supporting film, a right gathering plate is fixedly connected to the right side, and an extension plate is fixedly connected to the front side of the supporting film. The extension plate extends into the jaws between the rear lower roller and the rear upper rubber roller.

[0008] In the method for producing multi-colored yarn as described above, preferably, the electromagnet is an arc-shaped structure.

[0009] In the method for producing a multi-colored yarn as described above, preferably, the length of the concave roller sleeve is equal to the length of the normal roller sleeve.

[0010] A method for producing multi-colored yarn as described above, wherein, preferably, the line connecting the first transmission connecting member and the second transmission connecting member transmits the center of the cross section of the recessed roller shaft.

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

[0012] A method for producing multi-colored yarn as described above, wherein, preferably, the roller shaft is driven by a motor, the electromagnetic switch includes two states of on and off, when the electromagnetic switch is in the off state, the electromagnet loses its magnetism, the telescopic spring is in a natural extension state without external force, and a certain distance is maintained between the electromagnet and the recessed roller shaft, correspondingly, the sliding connection between the roller sleeve and the roller shaft, 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 has magnetism, the electromagnet is adsorbed on the recessed roller shaft, the transmission connection between the roller sleeve and the roller shaft, at this time, the rotation of the roller shaft drives the roller sleeve to rotate synchronously.

[0013] A method for producing multi-colored yarn as described above, wherein, preferably, 6 white combed cotton strips and 6 colored combed cotton strips are arranged at intervals and pressed and fed between each roller sleeve and the corresponding rubber roller sleeve, so that the roller sleeve is divided into white cotton strips fed into the roller sleeve and colored cotton strips fed into the roller sleeve, including the production of multi-colored cotton strips with fixed color distribution and the production of multi-colored cotton strips with random color distribution.

[0014] A method for producing multi-colored yarn as described above, wherein preferably, for the production of multi-colored cotton strips with fixed color distribution, the required number of colored combed cotton strips and the required number of white combed cotton strips are selected according to the needs, and the total number of colored combed cotton strips and white combed cotton strips is 6, and then the electromagnetic switch of the magnetically controllable transmission connecting piece of the white cotton strip feeding roller sleeve that is consistent with the required number of white combed cotton strips to be fed is randomly selected and is in an open state, thereby realizing the feeding of a corresponding number of white combed cotton strips, and at the same time, the magnetic switch of the magnetically controllable transmission connecting piece of the colored cotton strip feeding roller sleeve that is consistent with the required number of colored combed cotton strips to be fed is randomly selected and is in an open state. The electromagnetic switch of the controllable transmission connector is in the on state, thereby realizing the feeding of a corresponding number of colored combed cotton strips. The fed white combed cotton strips and colored combed cotton strips are supported by the corresponding supporting plates and enter the drafting system. They are stretched and thinned by the drafting system and then recombined to obtain colorful cotton strips with fixed color distribution. When the white combed cotton strips or the colored combed cotton strips are changed from the feeding state to the feeding stop state, the continuously rotating rear lower roller and the rear upper rubber roller break the cotton strips at the jaws, and the broken cotton strips continue to be supported by the supporting bottom film and the extension film, so as to prepare for the next selection and feeding of the cotton strips.

[0015] In order to improve the dryness of the colorful cotton strips produced, while keeping the number of white combed cotton strips fed unchanged, the electromagnetic switch of the magnetically controllable transmission connecting piece of the roller sleeve for feeding white cotton strips that are consistent with the required number of white combed cotton strips to be fed is randomly reselected after a certain interval and is in an open state; while keeping the number of colored combed cotton strips fed unchanged, the electromagnetic switch of the magnetically controllable transmission connecting piece of the roller sleeve for feeding colored cotton strips that are consistent with the required number of colored combed cotton strips to be fed is randomly reselected after a certain interval and is in an open state; while keeping the color distribution of the colorful cotton strips produced unchanged, random changes are achieved while the number of fed colored combed cotton strips and white combed cotton strips remains unchanged, thereby achieving a more random combination of coarse and fine details in the fed colored combed cotton strips and white combed cotton strips.

[0016] A method for producing multi-colored yarn as described above, wherein preferably, for the production of multi-colored cotton strips with random color distribution, the required number of colored combed cotton strips and the required number of white combed cotton strips are randomly selected, and the total number of colored combed cotton strips and white combed cotton strips is 6, and then the electromagnetic switch of the magnetically controllable transmission connecting piece of the white cotton strip feeding roller sleeve that is consistent with the required number of white combed cotton strips to be fed is randomly selected and is in an on state, so as to realize the feeding of a corresponding number of white combed cotton strips, and at the same time, the electromagnetic switch of the magnetically controllable transmission connecting piece of the colored cotton strip feeding roller sleeve that is consistent with the required number of colored combed cotton strips to be fed is randomly selected and is in an on state, so as to realize the feeding of a corresponding number of colored combed cotton strips, and the fed white combed cotton strips and colored combed cotton strips are jointly fed through the drawing The stretching system stretches and thins the cotton strips and then recombines them to obtain colorful cotton strips with random color distribution. Then, after a certain interval, the required number of colored combed cotton strips and the required number of white combed cotton strips are randomly reselected, and the total number of colored combed cotton strips and white combed cotton strips is 6. Then, white cotton strips that are consistent with the required number of white combed cotton strips to be fed are randomly selected and fed into the roller sleeve, and the electromagnetic switch of the magnetically controllable transmission connecting part is in the open state. The colored cotton strips that are consistent with the required number of colored combed cotton strips to be fed are randomly selected and fed into the roller sleeve, and the electromagnetic switch of the magnetically controllable transmission connecting part is in the open state, so as to realize the random change of the number of colored combed cotton strips and white combed cotton strips fed, and realize the random change of the color distribution effect of the obtained colorful cotton strips.

[0017] Compared with the prior art, the present invention arranges a selective feeding roller pair including a selective feeding lower roller and a selective feeding upper rubber roller at the rear of the rear roller pair of the drafting system of the hybrid drawing frame, and a roller sleeve is connected to the roller shaft of the selective feeding lower roller through a magnetically controllable transmission connecting piece, and the transmission connection control between the roller sleeve and the roller shaft is realized by magnetic control of the electromagnet of the magnetically controllable transmission connecting piece, and a holding plate is arranged at the rear of the rear roller pair directly opposite to the middle part of each roller sleeve, so as to realize the selective feeding of white combed cotton slivers and colored combed cotton slivers, and then realize the production of colorful cotton slivers with different color effects, thereby realizing the production of colorful yarn with more uniform color distribution, enriching the yarn varieties, and improving the added value of the yarn. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It 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 the reference numerals: 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 connecting member, 8 - second transmission connecting member, 9 - telescopic rod, 10 - telescopic spring, 11 - electromagnet. DETAILED DESCRIPTION

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

[0021] The invention provides a method for producing multi-color yarn, comprising the steps of preparing white combed cotton strips through a combing and carding process for white raw cotton fibers, preparing colored combed cotton strips through opening, cleaning and carding for colored cotton fibers, preparing white combed cotton strips and colored combed cotton strips through combing preparation and combing, respectively, preparing white combed cotton strips and colored combed cotton strips through their own combing preparation and combing, preparing multi-color cotton strips through mixing and drawing by mixing and drawing, and providing a pair of selective feeding rollers at the rear of the drafting rear rollers of the mixed and drawn strips, the pair of selective feeding rollers comprising a selective feeding lower roller and a selective feeding upper rubber roller, the selective feeding lower roller comprising a solid roller shaft 1, and 12 roller sleeves 4 are sequentially sleeved on the roller shaft 1, and each roller sleeve 4 is respectively connected to the roller shaft 1 through a magnetically controllable transmission connector. The roller shaft 1 is connected to each other, and the roller shaft 1 is driven by a motor. The selective feeding rubber roller includes a solid rubber roller shaft, and 12 rubber roller sleeves are sequentially sleeved on the rubber roller shaft, and each rubber roller sleeve is connected to the rubber roller shaft through a bearing, and the rubber roller sleeve can rotate freely along the rubber roller shaft. 6 white combed cotton strips and 6 colored combed cotton strips are arranged at intervals and pressed and fed between each roller sleeve 4 and the corresponding rubber roller sleeve. The white combed cotton strips and the colored combed cotton strips are selectively fed by disconnecting and closing the magnetically controllable transmission connecting piece, and then the color effect control of the obtained cotton strips is realized. The obtained colorful cotton strips are then subjected to two drawing processes to obtain colorful cotton cooked strips with improved strip uniformity, and then the required colorful yarns are obtained through coarse yarn and fine yarn, which includes the following steps:

[0022] Step 1: Cotton matching: Select white raw cotton fibers and colored raw cotton fibers with high grade, milky white color and mercerized luster, long length, good uniformity, soft fiber, high strength, moderate maturity, and few impurities; select white raw cotton fibers with a main body length of 30.89mm, a short fiber rate of 9.66%, a maturity of 1.67, and a breaking strength of 3.8cN / dtex; select colored raw cotton fibers with a main body length of 29.45mm, a short fiber rate of 10.89%, a maturity of 1.66, and a breaking strength of 3.68cN / dtex.

[0023] Step 2: White raw cotton cleaning and carding, colored raw cotton opening, cleaning and carding: For white raw cotton, the selected white raw cotton fibers are sequentially grabbed by the reciprocating cotton grabber according to the required mixing ratio, and the raw cotton fibers are initially opened and mixed by tearing the fibers by the cotton grabber beaters during the grabbing process. The metal impurities and sparks in the grabbed raw cotton fibers are removed by the metal spark detector, and the block impurities in the raw cotton fibers are separated and removed by the heavy object separator. The cotton flow is transported to the cotton opener through the condenser on the double-axial flow cotton opener with a condenser, and the raw cotton fibers are torn and transferred between the two roller beaters of the cotton opener. Then, the raw cotton fibers and the opening and impurities are removed during the transfer process, and then the cotton flow is transported to the multi-bin cotton mixer through the cotton conveying pipeline. In each cotton bin, the cotton fibers randomly fall into the cotton bin to achieve random mixing of various cotton fibers, and then the raw cotton fibers are output from the cotton bin and merged, and the raw cotton fibers are opened and cleaned during the transportation process. Due to the positional relationship of the cotton bins, the transportation paths of the raw cotton fibers in each cotton bin are different, and then the various cotton fibers at the junction are randomly mixed again, and the raw cotton fibers are further opened and cleaned by the cotton cleaner to obtain raw cotton fiber clusters. The raw cotton fiber clusters enter the carding machine with a cotton feeding box through the cotton conveying pipeline, and the raw cotton fibers are evenly laid in the cotton feeding box, and the even raw cotton fiber layer is directly fed into the cotton conveying machine, and the cotton conveying machine performs intensive and meticulous opening, combing, impurity removal, and stripping to obtain white carded cotton strips.

[0024] For colored raw cotton, the selected colored raw cotton fibers are sequentially grasped by a reciprocating cotton grasping machine according to the required mixing ratio, and in the grasping process, the fibers are torn by the cotton grasping beaters to achieve preliminary opening and mixing of the raw cotton fibers, and the metal block impurities in the grasped colored raw cotton fibers are separated and removed by a metal debris removing device, and the colored raw cotton fibers are conveyed and preliminarily opened and mixed by the premixed cotton with a cotton condenser, and the colored cotton fibers are conveyed and condensed by a three-roller cotton opener with a cotton condenser, and the conveyed colored cotton fibers are transferred and torn between the three roller beaters of the cotton opener to achieve fiber loosening, and impurities in the colored cotton fibers are dropped and removed during the transfer process, and the colored cotton flow is conveyed to the six cotton bins of the multi-bin cotton mixing machine through the cotton conveying pipeline, and the random mixing of various cotton fibers is achieved by the cotton fibers randomly falling into the cotton bins, and then the colored cotton fibers are The colored cotton fibers are output and merged in the warp cotton bin, and the colored cotton fibers are opened and removed during the transportation process. Due to the positional relationship of the cotton bins, the transportation paths of the colored cotton fibers in each cotton bin are different, and then the various colored cotton fibers are randomly mixed again at the junction. The colored cotton fibers are transported and condensed by the porcupine cotton opener with a cotton condenser, and the colored cotton fibers transported in are carefully opened and removed by the porcupine cotton opener again, and then the prepared colored cotton fiber flow is distributed on demand through electrical cotton distribution. The colored cotton fibers distributed on demand are transported and condensed through a cotton box with a cotton condenser, and the colored cotton fibers transported in are evenly laid through the cotton box to obtain a uniform colored cotton fiber layer. The colored cotton fiber layer is opened, removed and leveled by a rolling machine to obtain a uniform colored cotton roll. The prepared colored cotton roll is carefully opened, combed, removed and formed into strips by a cotton combing machine to obtain a colored combed cotton strip with a strip structure.

[0025] The third step: combing: white carded cotton strips are subjected to the first pre-striping and strip-rolling to obtain white cotton rolls, and then the white cotton rolls are subjected to the first combing to obtain white combed cotton strips, and the colored carded cotton strips are subjected to the second pre-striping and strip-rolling to obtain colored cotton rolls, and then the colored cotton rolls are subjected to the second combing to obtain colored combed cotton strips; a drawing frame is selected in the first pre-striping, and 6 white carded cotton strips are fed together in the first pre-striping, and the 6 white carded cotton strips fed together are stretched and thinned by the drafting system of the drawing frame and then recombined to obtain white cotton pre-strips with improved strip uniformity and fiber straightness. The prepared white cotton pre-slivers are divided into three groups and fed into the strip and roll combined machine, each group includes 16-20 white cotton pre-slivers, and each group of white cotton pre-slivers are fed through the guide roller, and then a small stretching and finishing action is performed on the guide plate and the drafting device to form a white cotton web. After the three-layer white cotton web is output, it passes through the curved guide plate, turns 90 degrees and is combined on the platform, and finally is pressed by the pressure roller and wound into a white cotton roll by the cotton roll roller. The prepared white cotton roll is gripped and combed by the combing machine to remove the short-staple fibers, thereby obtaining white combed cotton slivers with more consistent fiber length distribution.

[0026] A drawing frame is used in the second pre-drawing. Eight colored carded cotton strips are fed together in the second pre-drawing. The eight colored carded cotton strips fed together are stretched and thinned by the drawing system of the drawing frame and then recombined to obtain a colored cotton pre-drawing with improved strip uniformity and fiber straightness. Since the strength and elongation of colored cotton fibers are slightly lower than those of white cotton fibers, eight colored carded cotton strips are fed together to reduce the damage to colored cotton fibers in the drawing process. The obtained colored cotton pre-drawing is fed to a strip lap machine. 16-24 colored cotton pre-drawing strips are used. The fed colored cotton pre-drawing strips are guided by the guide roller and the guide roller. The V-shaped platform turns 90 degrees for parallel arrangement and merging. After the turning and merging, the colored cotton pre-slivers enter the drafting device under the guidance of the guide roller for a small drafting and finishing action to obtain a colored cotton layer. The colored cotton layer after drafting is pressed by the pressing roller to prevent sticking. The colored cotton layer is driven by the cotton roll roller to produce a colored cotton roll. The obtained white cotton roll is gripped and combed by the combing machine to remove the short-staple fibers, thereby obtaining a colored combed cotton strip with more consistent fiber length distribution. The combing process follows the process principles of "focusing on preparation, less sticking, grasping timing and positioning, balancing cotton drop, reducing eye difference, heavy pressure, and accurate bite".

[0027] Step 4: Mixed drawing: The prepared white combed cotton strips and colored combed cotton strips are mixed and drawn together to obtain colorful cotton strips with controllable color distribution effect. The mixed drawing machine 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, and the front and rear roller pairs include a front lower roller and a front upper rubber roller. A selective feeding roller pair is arranged at the rear of the rear roller pair. The selective feeding roller pair includes a selective feeding lower roller and a selective feeding upper rubber roller. Figure 1As shown, the lower feeding roller includes a roller shaft 1, which is a solid cylindrical structure. A hollow roller set is sleeved on the solid roller shaft 1. The roller set includes 12 identical roller sleeves 4. The roller shaft 1 and the roller sleeve 4 are made of the same material. A transmission connection outer groove is arranged on the outer side of the middle part of the roller shaft 1 at each roller sleeve 4 position, so that the roller shaft 1 is divided into 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 of the diameter of the normal roller shaft 2, and the length of the recessed roller shaft 3 is 1 / 3 of the length of the normal roller shaft 2. A transmission connection inner groove is arranged on the inner side surface of the middle part of the roller sleeve 4, so that the roller sleeve 4 is divided into 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 1.2 times, the length of the concave roller sleeve 6 is equal to the length of the normal roller sleeve 5, the roller sleeve 4 is sleeved on the roller shaft 1, and the normal roller sleeve 5 and the normal roller shaft 2 are kept smoothly close, so that the concave roller sleeve 6 and the concave roller shaft 3 are kept facing each other, and a magnetically controllable transmission connecting member is arranged in the area between the concave roller sleeve 6 and the concave roller shaft 3, and the magnetically controllable transmission connecting member includes a first transmission connecting member 7 and a second transmission connecting member 8 with the same structure, and the connecting line between the first transmission connecting member 7 and the second transmission connecting member 8 drives the transverse direction of the concave roller shaft 31 The center of the cross section, the first transmission connecting member 7 and the second transmission connecting member 8 include a telescopic rod 9, a telescopic spring 10 and an electromagnet 11, the telescopic rod 9 is a freely retractable structure, one end of the telescopic rod 9 is fixedly connected to the inner side of the concave roller shaft 3, and an electromagnet 11 is arranged on the other end of the telescopic rod 9. The electromagnet 11 is an arc-shaped structure, and the electromagnet 11 is controlled by an electromagnetic switch. Each electromagnetic switch is connected to the programmable logic controller for communication. A telescopic spring 10 is sleeved on the telescopic rod 9, and the two ends of the telescopic spring 10 are respectively connected to the inner side of the concave roller sleeve 6 and the electromagnet 1 1 is fixedly connected between them, a holding plate is arranged at the rear part of the rear roller pair directly opposite to the middle part of each roller sleeve 4, the holding plate includes a holding bottom film, the rear side edge and the front side edge of the holding bottom film are both straight lines, the left side edge of the holding bottom film is an arc convex to the right, and the right side edge is an arc convex to the left, a left gathering piece is fixedly connected to the left side edge of the holding bottom film, a right gathering piece is fixedly connected to the right side edge, an extension piece is fixedly connected to the front side edge of the holding bottom film, and the extension piece extends into the jaws between the rear lower roller and the rear upper rubber roller, the roller shaft 1 is driven by a motor, and the electromagnetic switch includes a switch There are two states: on and off. When the electromagnetic switch is in the off state, the electromagnet 11 loses its magnetism. Without external force, the telescopic spring 10 is in a naturally extended state and a certain distance is maintained between the electromagnet 11 and the concave roller shaft 3. The corresponding roller sleeve 4 is in a sliding connection with the roller shaft 1. At this time, the rotation of the roller shaft 1 cannot drive the roller sleeve 4 to rotate. When the electromagnetic switch is in the on state, the electromagnet 11 has magnetism and is adsorbed on the concave roller shaft 3. The transmission connection between the roller sleeve 4 and the roller shaft 1 is that the rotation of the roller shaft 1 drives the roller sleeve 4 to rotate synchronously.

[0028] The rubber roller selected for feeding includes a rubber roller shaft, which is a solid cylindrical structure. A hollow rubber roller set is sleeved on the solid rubber roller shaft. The rubber roller set includes 12 completely identical rubber roller sets. The rubber roller shaft is made of iron, and the rubber roller sets are made of rubber. Each rubber roller set is connected to the rubber roller shaft through its own bearing, and each rubber roller set can rotate freely along the rubber roller shaft. When in use, 6 white combed cotton strips and 6 colored combed cotton strips are arranged at intervals and pressed and fed between each roller set 4 and the corresponding rubber roller set, so that the roller set 4 is divided into a white cotton strip feeding roller set 4 and a colored cotton strip feeding roller set 4, including the production of colorful cotton strips with fixed color distribution and the production of colorful cotton strips with random color distribution.

[0029] For the production of colorful cotton strips with fixed color distribution, the required number of colored combed cotton strips and the required number of white combed cotton strips are selected according to the needs, and the total number of colored combed cotton strips and white combed cotton strips is 6, and then the electromagnetic switch of the magnetically controllable transmission connecting piece of the white cotton strip feeding roller sleeve 4 which is consistent with the required number of white combed cotton strips to be fed is randomly selected and is in the open state, thereby realizing the feeding of the corresponding number of white combed cotton strips, and at the same time, the magnetically controllable transmission connecting piece of the colored cotton strip feeding roller sleeve 4 which is consistent with the required number of colored combed cotton strips to be fed is randomly selected and ... The electromagnetic switch of the component is in the on state, thereby realizing the feeding of the corresponding number of colored combed cotton slivers. The fed white combed cotton slivers and colored combed cotton slivers are supported by the corresponding supporting plates and enter the drafting system. They are stretched and thinned by the drafting system and then recombined to obtain colorful cotton slivers with fixed color distribution. When the white combed cotton slivers or the colored combed cotton slivers are changed from the feeding state to the feeding stop state, the continuously rotating rear lower roller and the rear upper rubber roller break the cotton slivers at the jaws, and the broken cotton slivers continue to be supported by the supporting film and the extension film, so as to prepare for the next selection of feeding of the cotton slivers.

[0030] At the same time, in order to improve the dryness of the colorful cotton strips obtained, while keeping the number of white combed cotton strips fed unchanged, the electromagnetic switch of the magnetically controllable transmission connecting piece of the white cotton strip feeding roller sleeve 4 that is consistent with the required number of white combed cotton strips fed is randomly reselected after a certain interval and is in the open state; while keeping the number of colored combed cotton strips fed unchanged, the electromagnetic switch of the magnetically controllable transmission connecting piece of the colored cotton strip feeding roller sleeve 4 that is consistent with the required number of colored combed cotton strips fed is randomly reselected after a certain interval and is in the open state, thereby achieving random changes in the number of fed colored combed cotton strips and white combed cotton strips while keeping the color distribution of the colorful cotton strips unchanged, thereby achieving a more random combination of coarse and fine details in the fed colored combed cotton strips and white combed cotton strips, and then improving the dryness uniformity of the colorful cotton strips obtained.

[0031] For the production of colorful cotton strips with random color distribution, the required number of colored combed cotton strips and the required number of white combed cotton strips are randomly selected, and the total number of colored combed cotton strips and white combed cotton strips is 6. Then, the electromagnetic switch of the magnetically controllable transmission connecting piece of the white cotton strip feeding roller sleeve 4 which is consistent with the required number of white combed cotton strips to be fed is randomly selected and is in the open state, thereby realizing the feeding of the corresponding number of white combed cotton strips. At the same time, the electromagnetic switch of the magnetically controllable transmission connecting piece of the colored cotton strip feeding roller sleeve 4 which is consistent with the required number of colored combed cotton strips to be fed is randomly selected and is in the open state, thereby realizing the feeding of the corresponding number of colored combed cotton strips. The fed white combed cotton strips and colored combed cotton strips are stretched and thinned by the stretching system together. The colorful cotton strips with random color distribution are obtained by re-merging, and then the required number of colored combed cotton strips and the required number of white combed cotton strips are randomly reselected after a certain interval, and the total number of colored combed cotton strips and white combed cotton strips is 6, and then the electromagnetic switch of the magnetically controllable transmission connecting part of the white cotton strip feeding roller sleeve 4 that is consistent with the required number of white combed cotton strips to be fed is randomly selected and is in the open state, and the electromagnetic switch of the magnetically controllable transmission connecting part of the colored cotton strip feeding roller sleeve 4 that is consistent with the required number of colored combed cotton strips to be fed is randomly selected and is in the open state, thereby realizing random changes in the numbers of colored combed cotton strips and white combed cotton strips fed, thereby realizing random changes in the color distribution effect of the obtained colorful cotton strips.

[0032] The fifth step: finishing and drawing: the colorful cotton strips obtained in the fourth step are subjected to two finishing and drawing to obtain colorful cotton mature strips with improved strip uniformity. The first finishing and drawing is carried out by using a drawing frame. The first finishing and drawing adopts 6 colorful cotton strips to be fed together. The 6 colorful cotton strips fed are stretched and thinned by the drawing frame and then gathered to obtain colorful cotton semi-mature strips with improved strip uniformity. The second finishing and drawing is carried out by using a drawing frame. The second finishing and drawing adopts 6 colorful cotton semi-mature strips to be fed together. The 6 colorful cotton semi-mature strips fed are stretched and thinned by the drawing frame and then combined to obtain colorful cotton mature strips with improved strip uniformity. The finishing and drawing process adopts the process principles of "appropriate spacing, stable holding, strong control, uniform stretching, smooth stretching, multiple merging, heavy pressure, light quantity, large spacing, low speed and anti-winding".

[0033] Step 6: Roving: The colorful cotton sliver obtained in the fifth step is stretched and fined by the drafting system of the roving frame and twisted and wound by the twisting system to obtain colorful cotton roving with certain strength. A wing roving frame is selected. The roving process adopts the process design principle of "light weight, large gauge, heavy pressure, large twist, small tension, medium axial and radial winding density, small elongation, small rear zone drafting, small jaws, and moderate collector diameter". The fed colorful cotton sliver is stretched in the drafting system of the roving frame. During the stretching process, the fibers in the colorful cotton sliver slip against each other, and during the slipping process, Due to the elasticity of the fibers, random transfer of the fibers occurs, thereby achieving random mixing of white cotton fibers and colored cotton fibers in the random transfer, thereby further achieving uniform mixing of the two, and then achieving a more uniform color distribution of the colorful cotton roving. The colorful cotton slivers obtained by the drafting system are twisted by the twisting system of the roving machine to obtain colorful cotton roving with a certain strength. During the twisting process, the fibers in the colorful cotton slivers undergo mutual transfer to achieve random mixing of white cotton fibers and colored cotton fibers again, thereby improving the uniformity of the color distribution of the colorful cotton roving.

[0034] Step 7: Spinning: The two colorful cotton rovings obtained in the sixth step are stretched and fined by the drafting system of the spinning frame and twisted and wound by the twisting system to obtain colorful cotton spun yarn with a certain strength. A ring spinning frame is selected, and the spinning process adopts the process design principle of "large gauge, medium twist, heavy pressure, medium elastic medium hard rubber roller, medium speed, small back zone drafting, small jaws, and appropriate temperature and humidity". The fed colorful cotton roving is stretched in the drafting system of the spinning frame. During the stretching process, the fibers in the colorful cotton roving slip against each other, and during the slipping process, due to the elasticity of the fibers Random transfer of fibers occurs, thereby achieving random mixing of white cotton fibers and colored cotton fibers in the random transfer, thereby further achieving uniform mixing of the two, and then achieving a more uniform color distribution of the colorful cotton yarn obtained. The colorful cotton slivers obtained by the drafting system are twisted by the twisting system of the spinning machine to obtain colorful cotton yarn with a certain strength. During the twisting process, the fibers in the colorful cotton slivers undergo mutual transfer to achieve random mixing of white cotton fibers and colored cotton fibers again, thereby improving the uniformity of the color distribution of the colorful cotton yarn obtained.

[0035] Taking the preparation of multi-colored yarn with a linear density of 9.7tex 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 plucker → AMP3000 metal Mars probe → TF50 heavy object separator → FA051 condenser + FA103B double axial flow cotton opener → JWF1026 multi-bin cotton mixer → JWF1124C cotton cleaner → FA151 dust remover → TF2202A cotton distribution tee → JWF1171 cotton feeding box → JWF1204B carding machine + TF2513 coiler → JWF1312 pre-drawing machine → E32 strip and roll combined machine → E65 combing machine

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

[0045] Mixing: Modified JWF1312 drawing frame (mixed drawing frame) → JWF1312 drawing frame → JWF1312 drawing frame → THC2015 roving frame → TH598 spinning frame

[0046] (3) Design of key process parameters

[0047] Blowing and carding:

[0048] Design of process parameters of cotton plucking machine

[0049]

[0050] Design of process parameters of cotton opener

[0051]

[0052] Carding process design table

[0053]

[0054] Combing:

[0055] Combing process design table

[0056]

[0057]

[0058] Drawing:

[0059] In the mixed drawing process, the production of colorful cotton slivers with fixed color distribution and the production of colorful cotton slivers with random color distribution are respectively carried out. For the production of colorful cotton slivers with fixed color distribution, the required number of colored combed cotton slivers and the required number of white combed cotton slivers are selected to be 3 respectively, and the interval time is set to 5s; for the production of colorful cotton slivers with random color distribution, within one cycle, the number of required colored combed cotton slivers is increased from 0 to 6, and the corresponding number of required white combed cotton slivers is reduced from 6 to 0, and the interval time of each change is set to 4s. The specific process design is as follows:

[0060] Drawing process design table

[0061]

[0062]

[0063] Roving:

[0064]

[0065] Fine yarn:

[0066]

[0067] (4) Yarn quality

[0068] At the same time, the selected white cotton fiber was used to process 9.7tex pure cotton combed yarn, and the quality was compared with the colorful yarn processed by this patent. The test results are as follows:

[0069] Yarn evenness test

[0070]

[0071]

[0072] Yarn strength test

[0073]

[0074] It is easy to see from the test results that: since this patent uses colored cotton fibers with lower strength, the strength and strength CV of the multi-colored yarn of this patent are lower than those of white cotton yarn, but the yarn evenness CV, as well as yarn defects including thin sections, thick sections, cotton knots, etc. are equivalent to those of white cotton yarn. This is because this patent uses a selective feeding roller pair to achieve precise selective feeding of colored cotton strips and white cotton strips, thereby achieving the production of multi-colored yarn with excellent spinning effect.

[0075] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. A method for producing multi-colored yarn, comprising: subjecting white raw cotton fibers to a combing and carding process to obtain white combed cotton strips, subjecting colored cotton fibers to opening, cleaning and carding to obtain colored combed cotton strips, subjecting white combed cotton strips and colored combed cotton strips to respective combing preparations and combing to obtain white combed cotton strips and colored combed cotton strips, and subjecting six white combed cotton strips and six colored combed cotton strips to mixed and drawn strips to obtain multi-colored cotton strips, wherein a selective feeding roller pair is provided at the rear of the drafting rear roller of the mixed and drawn strips, wherein the selective feeding roller pair comprises a selective feeding lower roller and a selective feeding upper rubber roller, wherein the selective feeding lower roller comprises a solid roller shaft, and 12 roller sleeves are sequentially sleeved on the roller shaft, and each roller sleeve is respectively controlled by a magnetic The transmission connecting piece is connected to the roller shaft, and the roller shaft is driven by a motor. The selective feeding rubber roller includes a solid rubber roller shaft, and 12 rubber roller sleeves are sequentially sleeved on the rubber roller shaft, and each rubber roller sleeve is connected to the rubber roller shaft through a bearing. Six white combed cotton strips and six colored combed cotton strips are arranged at intervals and pressed and fed between each roller sleeve and the corresponding rubber roller sleeve. The selective feeding of white combed cotton strips and colored combed cotton strips is realized by disconnecting and closing the magnetically controllable transmission connecting piece, so as to obtain colorful cotton strips with controllable color effects. The obtained colorful cotton strips are then subjected to two drawing processes to obtain colorful cotton cooked strips with improved strip uniformity, and then the required colorful yarns are obtained through coarse yarn and fine yarn. The invention is characterized in that: A transmission connection outer 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 normal roller shafts on the left and right sides and a recessed roller shaft in the middle, the diameter of the recessed roller shaft is 1 / 2 of the diameter of the normal roller shaft, and the length of the recessed roller shaft is 1 / 3 of the length of the normal roller shaft. A transmission connection inner groove is provided on the inner side surface of the middle part of the roller sleeve, so that the roller sleeve is divided into normal roller sleeves 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 sleeved on the roller shaft, and the normal roller sleeve and the normal roller shaft are kept smoothly close, and the recessed roller sleeve and the recessed roller shaft are kept facing each other, and a magnetically controllable transmission connecting member is provided in the area between the recessed roller sleeve and the recessed roller shaft, and the magnetically controllable transmission connecting member includes a first transmission connecting member and a second transmission connecting member with the same structure, The first transmission connecting member and the second transmission connecting member include a telescopic rod, a telescopic spring and an electromagnet. The telescopic rod is a freely retractable structure. One end of the telescopic rod is fixedly connected to the inner side surface of the recessed roller shaft. An electromagnet is arranged on the other end of the telescopic rod and is controlled by an electromagnetic switch. A telescopic spring is sleeved on the telescopic rod. The two ends of the telescopic spring are respectively fixedly connected to the inner side surface of the recessed roller sleeve and the electromagnet. A supporting plate is arranged at the rear of the rear roller pair opposite to the middle part of each roller sleeve. The supporting plate includes a supporting film. The rear side and the front side of the supporting film are both straight lines. The left side of the supporting film is an arc convex to the right, and the right side is an arc convex to the left. A left gathering plate is fixedly connected to the left side of the supporting film, a right gathering plate is fixedly connected to the right side, and an extension plate is fixedly connected to the front side of the supporting film. The extension plate extends into the jaws between the rear lower roller and the rear upper rubber roller.

2. The method for producing multi-colored yarn according to claim 1, characterized in that: The electromagnet is an arc-shaped structure.

3. The method for producing multi-colored 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 multi-colored yarn according to claim 1, characterized in that: The line connecting the first transmission connector and the second transmission connector transmits the center of the cross section of the recessed roller shaft.

5. The method for producing multi-colored 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 multi-colored yarn according to claim 1, characterized in that: The roller shaft is driven by a motor, and the electromagnetic switch includes two states, open and closed. When the electromagnetic switch is in the closed state, the electromagnet loses its magnetism, and the telescopic spring is in a natural extension state without external force, and a certain distance is maintained between the electromagnet and the recessed roller shaft, correspondingly, the sliding connection between the roller sleeve and the roller shaft, at this time, the rotation of the roller shaft cannot drive the roller sleeve to rotate, and when the electromagnetic switch is in the open state, the electromagnet has magnetism, and the electromagnet is adsorbed on the recessed roller shaft, and the transmission connection between the roller sleeve and the roller shaft is established, and at this time, the rotation of the roller shaft drives the roller sleeve to rotate synchronously.

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

8. The method for producing multi-colored yarn according to claim 7, characterized in that: For the production of colorful cotton slivers with fixed color distribution, the required number of colored combed cotton slivers and the required number of white combed cotton slivers are selected according to the needs, and the total number of colored combed cotton slivers and white combed cotton slivers is 6, and then the electromagnetic switch of the magnetically controllable transmission connecting piece of the white cotton sliver feeding roller sleeve that is consistent with the required number of white combed cotton slivers to be fed is randomly selected and is in the open state, thereby realizing the feeding of the corresponding number of white combed cotton slivers, and at the same time, the electromagnetic switch of the magnetically controllable transmission connecting piece of the colored cotton sliver feeding roller sleeve that is consistent with the required number of colored combed cotton slivers to be fed is randomly selected. The magnetic switch is in the on state, thereby realizing the feeding of a corresponding number of colored combed cotton strips. The fed white combed cotton strips and colored combed cotton strips are supported by the corresponding supporting plates and enter the drafting system. They are stretched and thinned by the drafting system and then recombined to obtain colorful cotton strips with fixed color distribution. When the white combed cotton strips or the colored combed cotton strips are changed from the feeding state to the feeding stop state, the continuously rotating rear lower roller and the rear upper rubber roller break the cotton strips at the jaws, and the broken cotton strips continue to be supported by the supporting bottom film and the extension film, so as to prepare for the next selection and feeding of the cotton strips. In order to improve the dryness of the colorful cotton strips produced, while keeping the number of white combed cotton strips fed unchanged, the electromagnetic switch of the magnetically controllable transmission connecting piece of the roller sleeve for feeding white cotton strips that are consistent with the required number of white combed cotton strips to be fed is randomly reselected after a certain interval and is in an open state; while keeping the number of colored combed cotton strips fed unchanged, the electromagnetic switch of the magnetically controllable transmission connecting piece of the roller sleeve for feeding colored cotton strips that are consistent with the required number of colored combed cotton strips to be fed is randomly reselected after a certain interval and is in an open state; while keeping the color distribution of the colorful cotton strips produced unchanged, random changes are achieved while the number of fed colored combed cotton strips and white combed cotton strips remains unchanged, thereby achieving a more random combination of coarse and fine details in the fed colored combed cotton strips and white combed cotton strips.

9. The method for producing multi-colored yarn according to claim 8, characterized in that: For the production of colorful cotton strips with random color distribution, the required number of colored combed cotton strips and the required number of white combed cotton strips are randomly selected, and the total number of colored combed cotton strips and white combed cotton strips is 6. Then, the electromagnetic switch of the magnetically controllable transmission connecting piece of the white cotton strip feeding roller sleeve that is consistent with the required number of white combed cotton strips to be fed is randomly selected and is in the open state, so as to realize the feeding of the corresponding number of white combed cotton strips. At the same time, the electromagnetic switch of the magnetically controllable transmission connecting piece of the colored cotton strip feeding roller sleeve that is consistent with the required number of colored combed cotton strips to be fed is randomly selected and is in the open state, so as to realize the feeding of the corresponding number of colored combed cotton strips. The fed white combed cotton strips and colored combed cotton strips are stretched and thinned by the stretching system and then re-combined. The method is to obtain colorful cotton strips with random color distribution, and then randomly reselect the required number of colored combed cotton strips and the required number of white combed cotton strips after a certain interval, and the total number of colored combed cotton strips and white combed cotton strips is 6. Then, white cotton strips consistent with the required number of white combed cotton strips to be fed are randomly selected and fed into the roller sleeve, and the electromagnetic switch of the magnetically controllable transmission connecting part is in the on state. Colored cotton strips consistent with the required number of colored combed cotton strips to be fed are randomly selected and fed into the roller sleeve, and the electromagnetic switch of the magnetically controllable transmission connecting part is in the on state, so as to realize random changes in the numbers of colored combed cotton strips and white combed cotton strips fed, and realize random changes in the color distribution effect of the obtained colorful cotton strips.

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