Yarn Processing System Cotton Spinning Yarn Processing System
According to the different cotton spinning technologies, cotton yarns are divided into three types: carded cotton yarns, combed cotton yarns and waste spinning cotton yarns.
The production process of carded cotton yarn: Open cotton→Carding→Drawing→Drawing→Rubber→Spinning→Post processing.
The production process of combed cotton yarns: open cleaning, carding, combing preparation, combing, paralleling, paralleling, roving, spinning, post processing.
Waste spinning cotton is the process of open cotton, roller carding, and spun yarn, using cotton waste and cotton as raw material. The following focuses on the introduction of carded cotton yarns and combed cotton yarns to the role of various processes in the cotton spinning process.
Open cotton
Open-clear cotton is the first tool of cotton spinning. The raw materials fed are either raw cotton or chemical fiber, and they are all compacted into packages. Raw cotton and magazines contain chemical fiber.
1. The role of open cleaning process
1 Open: Loosen tightly in the cotton bales to loosen as small a bundle as possible, but be careful not to damage the fibres as much as possible.
2 Excluding impurities: Effectively remove all kinds of impurities and defects in the raw cotton, and as few as possible spinnable fibers.
3 Mixing: According to the composition of cotton, various kinds of raw cotton with different properties are mixed fully and carefully.
4 evenly into a roll: make a certain size, uniform lap for the carding process.
If a carding couple is used, it is not made into a lap, but fed to the carding machine in the form of a uniform stream of cotton.
2. The role of single machine in opening and cleaning cotton combined unit
The above-mentioned effect is achieved through a series of single-machine open-cleaning coal-joint units. These stand-alone machines can be divided into five categories according to their main roles:
1 Grab cotton machinery: Initial opening and mixing through the grasping of raw materials.
2 Mixing machine: mainly by mixing, with the role of gargle and removal of impurities.
3 Open the cotton machine: Use high-speed rotary beaters to hit the cotton block to achieve efficient opening and cleaning.
4 to the cotton machinery: close to the coiler, to feed the role of uniform.
5 Cleaning Machine: Also known as a rolling machine, the raw materials are carefully opened and removed, and then a uniform lap is made.
3. Common open cleaning process
1 Commonly used spinning and weaving process: FA002 disc type picking machine × 2 sets (or FA006 type reciprocating picker × 1 set) → A006BS automatic mixer → FA022 multi-bin mixer → FA104 six rollers Opener → FA106 Porcupine Type Opener → FA106 Porcupine Type Cotton Opener → A062 Electric Blender → (A092AST Double Cotton Box Feeder → FA141 Single Player Winder) × 2
2 Commonly used spinning and chemical fiber opener cleaning process: FA002 disc type cotton grabber × 2 sets (or FA006 type reciprocating bale grabber × 1 set) → A006CS automatic blender → FA106A comb needle roller opener → A062 Electrical distribution equipment → (A092AST double cotton box feeder → FA141 single player winder) × 2
Second carding
Among the laps (or loose cotton) supplied during the open-cleaning process, the fibers are mostly in the form of loose cotton and cotton, and contain 40% to 50% of impurities, most of which are smaller fibers or have strong adhesion. Impurities and neps. In order to prepare for the drafting of the draw, roving, and spun yarn processes, the fiber bundle must be completely disintegrated into single fibers. Colleagues asked to continue to remove small impurities in the residual cotton bundles. With the release and removal of impurities, the fibers of the blended cotton ingredients should also be thoroughly blended, and finally the slivers should be made.
The role of the carding process is:
1 Combing: Comb and block or bunched fibers are combed into monofilament using the serrations and card clothing on the carding machine.
2 Excluding miscellaneous: Based on re-sparing, the remaining small magazines are clearly visible.
3 Homogenous mixing: The single fibers are fully mixed and the output product is uniform in thickness by the ability to suck and release fibers by the needles of the carding machine.
4 into a strip: made of a certain size and quality requirements of the sliver (commonly known as sliver), regularly placed in the sliver tube for the next procedure to use.
On the carding machine, the lap is unwound into a cotton layer, and the cotton layer is combed several times between the cotton feeding roller, the licker-in roller, the licker-in and the carding board, the cylinder and the cover plate, and the needle surface of the cylinder and the doffer. The surface of the resurfacing condenses into a cotton net. The stripping device and the bell mouth are bundled into strips. The rods are regularly placed in the cans for use in the next process. In this process, the nodules and cover flowers are used. Remove impurities.
Three combing
Cotton spinning is divided into two types: carded spinning system and combed spinning system. The difference between the latter and the former is that the combing process is added between carding and drawing. The reason for the increase in the combing process is that there are many short piles and knots in the carding strips, and the fiber's straightness and degree of separation are also poor. These defects will affect the quality of the yarns. Therefore, the requirements for spinning quality are higher. For yarns, a combed spinning system must be used.
Compared with the same special number of carded yarns, the combed yarns of the combing process can increase the yarn strength by 10% to 20%, and the number of neat particles can be reduced by 50% to 60%, and the yarn is dried. Uniform, better luster. Therefore, the combed yarns have the characteristics of high strength, less knotty, uniform dryness, and good gloss. Therefore, the fabrics with higher quality requirements, such as smooth and thin high-grade shirts, and fine, fine poplins, are all made of combed yarns. In addition, some special yarns such as tire cords, high-speed sewing threads, process embroidery threads, etc., are also used in order to improve the yarn quality. When there spun cotton blended yarn, cotton fibers and subject combed sliver combing process is made, and then polyester strip and the strip more steps to increase the noil, increased raw material costs, and therefore, if the step of using combing All aspects should be considered from the aspects of improving yarn quality, saving cotton, and reducing costs.
1. The role of the combing process
1 Excluding short fiber: Increase the length and uniformity of the fiber to improve the yarn dryness, reduce yarn hairiness, and improve yarn strength.
2 Suppression of nep impurities: Under general process conditions, the combing process can eliminate approximately 50% to 60% of the impurities in the raw bar and 10% to 20% of the neps (most of which are large neps), thereby improving The appearance quality of the yarn.
3 Straight parallel fibers: Improve the parallelism of the fibers, increase the dryness and strength of the yarn, and improve the gloss of the yarn.
4 even into a strip: made of uniform thin combed sliver, combed cotton sliver weight is low, about 1.5% ~ 2%.
2. The composition of the combing process
The combing process consists of combing preparation and combing machine.
(1) Combing preparation: The arrangement of the fibers in the carding sliver is confusing, and most of the fibers are in a hooked state. If such a sliver is directly used for combing by a combing machine, the fibers are easily broken or the fiber can be made to fall. cotton. In addition, the combed sliver must be subjected to a preparatory process before being fed into combing to produce a good-quality small roll suitable for processing by a combing machine.
The role of the combing preparation project is:
1 Improve the parallelism of the fibers to reduce the damage to the fibers of the comber, reduce the content of long fibers in the cotton, and save cotton.
2 It is made into a small volume with accurate quantification, tight winding, clear gradation, and uniform longitudinal and transverse direction of the cotton layer. It is used by the combing machine.
The process flow for combing preparation is generally the draw frame used in the spinning system, while the other three machines are special equipment for the combing preparation process.
The combing preparation uses three kinds of technological processes: pre-drawing machine, bar-winding machine, bar-winding machine, winding machine, pre-drawing machine, bar-winding-winding combiner. The first kind of technological process is simple in structure, easy to manage and maintain, and has a small footprint, which is commonly used in China.
(b) Combing: Combing is the process of using a comber. The comber periodically cuts the cotton layer, combs the fiber ends, and then joins the cotton webs one after the other to form a continuous output of the combed sliver.
Four bars
Although the sliver produced by the carding machine has a preliminary morphology of the yarn, the long-segment irregularity is large, and most of the fibers are in a hooked or curled state. Therefore, the sliver must be further processed through the doubling process. To improve the quality of slivers.
The main role of the drawing process is:
1 Paralleling: 6 to 8 roots were fed into the draw frame in parallel so that the thickness of each sliver was overlapped by chance and the unevenness of the long sliver was improved.
2 Drafting: The length of the sliver shall be attenuated, and the lengthy drawing of the sliver shall be achieved through the mutual slipping of the fibers in the sliver. During the fiber slip, the fiber in the hooked or curled state will be obtained. Stretching in parallel, the small cotton bundle will be separated into single fibers, thereby improving the internal structure of the sliver. This is a further drafting of the subsequent process, and finally creates the conditions for spinning even and uniform yarns. The draft multiple can be adjusted, and the drafting process is the most convenient. Therefore, adjusting the draw draft in time can effectively control the thickness of the final yarn to ensure that the spun yarn meets the requirements.
3 Mixing: Through the combination of the draw frame, the fibers in various slivers can be fully mixed, and the fiber components in the sliver cross-section can be evenly distributed.
4 into a strip: The sliver made from the draw frame is regularly placed inside the sliver tube for easy handling and storage for use in the next process.
The draw frame consists of three parts: feed, draft, and bar.
Five rovings
The drawing of the sliver from the draw frame directly to the spun yarn requires approximately 150 times more draft. However, the drafting capacity of the ring spinning machine does not meet this requirement. Therefore, roving is required between the drawing process and the spinning process. The process takes on part of the drafting burden in spinning.
The role of the roving process is:
1 Stretching: Pull the sliver to 5 to 10 times the length and make the fiber straight and parallel.
2 Twist: Since the number of fiber strands in the sliver cross section after drafting by the roving frame is small and the parallelism is good, the strength is low. Therefore, it is necessary to add a certain twist to increase the strength of the roving to avoid winding and unwinding. Unexpectedly stretch and prepare for spinning draft.
3 Winding and forming: The twisted roving is set on a bobbin and made into a package of a certain shape and size for storage, handling and adaptation to feeding on the spinning frame.
Roving machine is divided into feeding, drafting, twisting, winding, forming five parts. The slivers are drawn from the cans, fed into the drafting device and drawn to the specified linear density, output from the front rollers, twisted into the rovings by the flyers, and directed to the bobbins. For each revolution of the flyer, a stencil is added to the sliver. The bobbin is driven by the lifting dragons and tendons, and due to the rotation speed difference between the rotor and the bobbin, the bobbin is wound on the bobbin again. The lifting ribs move up and down with the bobbin, thus achieving the axial winding of the roving on the bobbin.
Six yarns
The spinning process is the last step in spinning production. It spins rovings into spun yarns with a certain linear density and meets the national quality standards for twisting, weaving or knitting.
The role of the spinning process is:
1 Drafting: The fed rovings are evenly attenuated to the required linear density of the spun yarn.
2 Twisting: The length of the skeined skein, plus the appropriate twist, is that the spun yarn has certain physical, mechanical properties such as strength, gloss, elasticity, and feel.
3 Winding: The spun yarn is wound on the bobbin according to certain requirements for transportation, storage and subsequent processing.
Seven post-processing
The processing after the spinning process is collectively referred to as post-processing, and generally includes the processes of winding, doubling, twisting, skeining, wrapping, and the like, and the finished product is package yarn or skein yarn.
1. Winding process
The bobbin sent from the spinning process is unwound and connected on the bobbin winder. After the clearing tension device is removed, the magazine and nep attached to the yarn surface are removed, and the yarn is wound under a certain tension to meet the specification requirements. In order to facilitate unwinding at a later stage in the process.
2. Yarn process
Two or more single yarns (up to no more than five) are combined in a rewinding machine. After clearing the yarn tension device, the knots on the yarn are removed and the yarn is evenly wound to improve the yarn. Machine efficiency and strand quality.
3. Squall line process
The plied yarns on the bobbin and the bobbin are then twisted with appropriate twists to produce strands that meet the requirements of different applications. The bobbins are then wound into packages of a certain shape, and the bobbins are fed into a bobbin. The twist line can increase the evenness and strength of the bar, increase the elasticity and wear resistance, and improve the gloss and feel.
4. Shaving and packing
Shaving is to shake the yarn to a certain weight or a certain length of skein yarn on a reeling machine so that it can be easily bleached or dyed. In the package, the skein yarn is twisted into small packages by piers, and then the package is formed into a middle package or a large package. The packaging volume must meet the regulations for long-distance transportation and storage.
For more information, please pay attention to China bubu.com
The production process of carded cotton yarn: Open cotton→Carding→Drawing→Drawing→Rubber→Spinning→Post processing.
The production process of combed cotton yarns: open cleaning, carding, combing preparation, combing, paralleling, paralleling, roving, spinning, post processing.
Waste spinning cotton is the process of open cotton, roller carding, and spun yarn, using cotton waste and cotton as raw material. The following focuses on the introduction of carded cotton yarns and combed cotton yarns to the role of various processes in the cotton spinning process.
Open cotton
Open-clear cotton is the first tool of cotton spinning. The raw materials fed are either raw cotton or chemical fiber, and they are all compacted into packages. Raw cotton and magazines contain chemical fiber.
1. The role of open cleaning process
1 Open: Loosen tightly in the cotton bales to loosen as small a bundle as possible, but be careful not to damage the fibres as much as possible.
2 Excluding impurities: Effectively remove all kinds of impurities and defects in the raw cotton, and as few as possible spinnable fibers.
3 Mixing: According to the composition of cotton, various kinds of raw cotton with different properties are mixed fully and carefully.
4 evenly into a roll: make a certain size, uniform lap for the carding process.
If a carding couple is used, it is not made into a lap, but fed to the carding machine in the form of a uniform stream of cotton.
2. The role of single machine in opening and cleaning cotton combined unit
The above-mentioned effect is achieved through a series of single-machine open-cleaning coal-joint units. These stand-alone machines can be divided into five categories according to their main roles:
1 Grab cotton machinery: Initial opening and mixing through the grasping of raw materials.
2 Mixing machine: mainly by mixing, with the role of gargle and removal of impurities.
3 Open the cotton machine: Use high-speed rotary beaters to hit the cotton block to achieve efficient opening and cleaning.
4 to the cotton machinery: close to the coiler, to feed the role of uniform.
5 Cleaning Machine: Also known as a rolling machine, the raw materials are carefully opened and removed, and then a uniform lap is made.
3. Common open cleaning process
1 Commonly used spinning and weaving process: FA002 disc type picking machine × 2 sets (or FA006 type reciprocating picker × 1 set) → A006BS automatic mixer → FA022 multi-bin mixer → FA104 six rollers Opener → FA106 Porcupine Type Opener → FA106 Porcupine Type Cotton Opener → A062 Electric Blender → (A092AST Double Cotton Box Feeder → FA141 Single Player Winder) × 2
2 Commonly used spinning and chemical fiber opener cleaning process: FA002 disc type cotton grabber × 2 sets (or FA006 type reciprocating bale grabber × 1 set) → A006CS automatic blender → FA106A comb needle roller opener → A062 Electrical distribution equipment → (A092AST double cotton box feeder → FA141 single player winder) × 2
Second carding
Among the laps (or loose cotton) supplied during the open-cleaning process, the fibers are mostly in the form of loose cotton and cotton, and contain 40% to 50% of impurities, most of which are smaller fibers or have strong adhesion. Impurities and neps. In order to prepare for the drafting of the draw, roving, and spun yarn processes, the fiber bundle must be completely disintegrated into single fibers. Colleagues asked to continue to remove small impurities in the residual cotton bundles. With the release and removal of impurities, the fibers of the blended cotton ingredients should also be thoroughly blended, and finally the slivers should be made.
The role of the carding process is:
1 Combing: Comb and block or bunched fibers are combed into monofilament using the serrations and card clothing on the carding machine.
2 Excluding miscellaneous: Based on re-sparing, the remaining small magazines are clearly visible.
3 Homogenous mixing: The single fibers are fully mixed and the output product is uniform in thickness by the ability to suck and release fibers by the needles of the carding machine.
4 into a strip: made of a certain size and quality requirements of the sliver (commonly known as sliver), regularly placed in the sliver tube for the next procedure to use.
On the carding machine, the lap is unwound into a cotton layer, and the cotton layer is combed several times between the cotton feeding roller, the licker-in roller, the licker-in and the carding board, the cylinder and the cover plate, and the needle surface of the cylinder and the doffer. The surface of the resurfacing condenses into a cotton net. The stripping device and the bell mouth are bundled into strips. The rods are regularly placed in the cans for use in the next process. In this process, the nodules and cover flowers are used. Remove impurities.
Three combing
Cotton spinning is divided into two types: carded spinning system and combed spinning system. The difference between the latter and the former is that the combing process is added between carding and drawing. The reason for the increase in the combing process is that there are many short piles and knots in the carding strips, and the fiber's straightness and degree of separation are also poor. These defects will affect the quality of the yarns. Therefore, the requirements for spinning quality are higher. For yarns, a combed spinning system must be used.
Compared with the same special number of carded yarns, the combed yarns of the combing process can increase the yarn strength by 10% to 20%, and the number of neat particles can be reduced by 50% to 60%, and the yarn is dried. Uniform, better luster. Therefore, the combed yarns have the characteristics of high strength, less knotty, uniform dryness, and good gloss. Therefore, the fabrics with higher quality requirements, such as smooth and thin high-grade shirts, and fine, fine poplins, are all made of combed yarns. In addition, some special yarns such as tire cords, high-speed sewing threads, process embroidery threads, etc., are also used in order to improve the yarn quality. When there spun cotton blended yarn, cotton fibers and subject combed sliver combing process is made, and then polyester strip and the strip more steps to increase the noil, increased raw material costs, and therefore, if the step of using combing All aspects should be considered from the aspects of improving yarn quality, saving cotton, and reducing costs.
1. The role of the combing process
1 Excluding short fiber: Increase the length and uniformity of the fiber to improve the yarn dryness, reduce yarn hairiness, and improve yarn strength.
2 Suppression of nep impurities: Under general process conditions, the combing process can eliminate approximately 50% to 60% of the impurities in the raw bar and 10% to 20% of the neps (most of which are large neps), thereby improving The appearance quality of the yarn.
3 Straight parallel fibers: Improve the parallelism of the fibers, increase the dryness and strength of the yarn, and improve the gloss of the yarn.
4 even into a strip: made of uniform thin combed sliver, combed cotton sliver weight is low, about 1.5% ~ 2%.
2. The composition of the combing process
The combing process consists of combing preparation and combing machine.
(1) Combing preparation: The arrangement of the fibers in the carding sliver is confusing, and most of the fibers are in a hooked state. If such a sliver is directly used for combing by a combing machine, the fibers are easily broken or the fiber can be made to fall. cotton. In addition, the combed sliver must be subjected to a preparatory process before being fed into combing to produce a good-quality small roll suitable for processing by a combing machine.
The role of the combing preparation project is:
1 Improve the parallelism of the fibers to reduce the damage to the fibers of the comber, reduce the content of long fibers in the cotton, and save cotton.
2 It is made into a small volume with accurate quantification, tight winding, clear gradation, and uniform longitudinal and transverse direction of the cotton layer. It is used by the combing machine.
The process flow for combing preparation is generally the draw frame used in the spinning system, while the other three machines are special equipment for the combing preparation process.
The combing preparation uses three kinds of technological processes: pre-drawing machine, bar-winding machine, bar-winding machine, winding machine, pre-drawing machine, bar-winding-winding combiner. The first kind of technological process is simple in structure, easy to manage and maintain, and has a small footprint, which is commonly used in China.
(b) Combing: Combing is the process of using a comber. The comber periodically cuts the cotton layer, combs the fiber ends, and then joins the cotton webs one after the other to form a continuous output of the combed sliver.
Four bars
Although the sliver produced by the carding machine has a preliminary morphology of the yarn, the long-segment irregularity is large, and most of the fibers are in a hooked or curled state. Therefore, the sliver must be further processed through the doubling process. To improve the quality of slivers.
The main role of the drawing process is:
1 Paralleling: 6 to 8 roots were fed into the draw frame in parallel so that the thickness of each sliver was overlapped by chance and the unevenness of the long sliver was improved.
2 Drafting: The length of the sliver shall be attenuated, and the lengthy drawing of the sliver shall be achieved through the mutual slipping of the fibers in the sliver. During the fiber slip, the fiber in the hooked or curled state will be obtained. Stretching in parallel, the small cotton bundle will be separated into single fibers, thereby improving the internal structure of the sliver. This is a further drafting of the subsequent process, and finally creates the conditions for spinning even and uniform yarns. The draft multiple can be adjusted, and the drafting process is the most convenient. Therefore, adjusting the draw draft in time can effectively control the thickness of the final yarn to ensure that the spun yarn meets the requirements.
3 Mixing: Through the combination of the draw frame, the fibers in various slivers can be fully mixed, and the fiber components in the sliver cross-section can be evenly distributed.
4 into a strip: The sliver made from the draw frame is regularly placed inside the sliver tube for easy handling and storage for use in the next process.
The draw frame consists of three parts: feed, draft, and bar.
Five rovings
The drawing of the sliver from the draw frame directly to the spun yarn requires approximately 150 times more draft. However, the drafting capacity of the ring spinning machine does not meet this requirement. Therefore, roving is required between the drawing process and the spinning process. The process takes on part of the drafting burden in spinning.
The role of the roving process is:
1 Stretching: Pull the sliver to 5 to 10 times the length and make the fiber straight and parallel.
2 Twist: Since the number of fiber strands in the sliver cross section after drafting by the roving frame is small and the parallelism is good, the strength is low. Therefore, it is necessary to add a certain twist to increase the strength of the roving to avoid winding and unwinding. Unexpectedly stretch and prepare for spinning draft.
3 Winding and forming: The twisted roving is set on a bobbin and made into a package of a certain shape and size for storage, handling and adaptation to feeding on the spinning frame.
Roving machine is divided into feeding, drafting, twisting, winding, forming five parts. The slivers are drawn from the cans, fed into the drafting device and drawn to the specified linear density, output from the front rollers, twisted into the rovings by the flyers, and directed to the bobbins. For each revolution of the flyer, a stencil is added to the sliver. The bobbin is driven by the lifting dragons and tendons, and due to the rotation speed difference between the rotor and the bobbin, the bobbin is wound on the bobbin again. The lifting ribs move up and down with the bobbin, thus achieving the axial winding of the roving on the bobbin.
Six yarns
The spinning process is the last step in spinning production. It spins rovings into spun yarns with a certain linear density and meets the national quality standards for twisting, weaving or knitting.
The role of the spinning process is:
1 Drafting: The fed rovings are evenly attenuated to the required linear density of the spun yarn.
2 Twisting: The length of the skeined skein, plus the appropriate twist, is that the spun yarn has certain physical, mechanical properties such as strength, gloss, elasticity, and feel.
3 Winding: The spun yarn is wound on the bobbin according to certain requirements for transportation, storage and subsequent processing.
Seven post-processing
The processing after the spinning process is collectively referred to as post-processing, and generally includes the processes of winding, doubling, twisting, skeining, wrapping, and the like, and the finished product is package yarn or skein yarn.
1. Winding process
The bobbin sent from the spinning process is unwound and connected on the bobbin winder. After the clearing tension device is removed, the magazine and nep attached to the yarn surface are removed, and the yarn is wound under a certain tension to meet the specification requirements. In order to facilitate unwinding at a later stage in the process.
2. Yarn process
Two or more single yarns (up to no more than five) are combined in a rewinding machine. After clearing the yarn tension device, the knots on the yarn are removed and the yarn is evenly wound to improve the yarn. Machine efficiency and strand quality.
3. Squall line process
The plied yarns on the bobbin and the bobbin are then twisted with appropriate twists to produce strands that meet the requirements of different applications. The bobbins are then wound into packages of a certain shape, and the bobbins are fed into a bobbin. The twist line can increase the evenness and strength of the bar, increase the elasticity and wear resistance, and improve the gloss and feel.
4. Shaving and packing
Shaving is to shake the yarn to a certain weight or a certain length of skein yarn on a reeling machine so that it can be easily bleached or dyed. In the package, the skein yarn is twisted into small packages by piers, and then the package is formed into a middle package or a large package. The packaging volume must meet the regulations for long-distance transportation and storage.
For more information, please pay attention to China bubu.com
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