Device for improving the quality of compact-spun yarns

Abstract

This invention discloses a device for improving the quality of compact spun yarn, comprising a pressure spring, a pressure assembly, a guide roller, a first roller, and a drafting assembly. One end of the pressure spring is connected to the top of the pressure assembly, and the other end is connected to the top of the guide roller, for applying vertically downward pressure to the guide roller. The first roller and the guide roller are arranged vertically and rotate simultaneously, and the contact point between the first roller and the guide roller when they rotate simultaneously is used to guide the yarn to the drafting assembly. The drafting assembly is connected to the pressure assembly and is used to draft the yarn. This device for improving the quality of compact spun yarn can be improved on an existing cradle without the need for reprocessing a new cradle, reducing costs. Furthermore, because the pressure spring applies a predetermined pressure to the guide roller, the yarn runs smoothly, and yarn vibration is reduced, thereby significantly improving the quality of the resulting yarn.

Description

Technical Field

[0001] This invention discloses a device for improving the quality of compact spun yarn, belonging to the field of cotton textile technology. Background Technology

[0002] Compact Siro spinning is a spinning method that combines Siro spinning and compact spinning techniques on traditional ring spinning. Its spinning principle involves feeding two rovings with a certain distance between them onto a spinning frame. After drafting, two single yarn slivers are output by the front roller and enter the pneumatic gathering zone. The two slivers converge at the convergence point and are further twisted into yarn, which is then wound onto a yarn bobbin to become a compact Siro yarn with a ply-like structure. Compact Siro spinning combines the advantages of compact and Siro spinning. This yarn is not only compact with a smooth appearance, low hairiness, and high strength, but also possesses the characteristics of AB yarn, as well as excellent anti-pilling, anti-friction, and anti-abrasion properties.

[0003] The drafting device on a spinning machine is commonly known as a rocker arm. Its main structure includes a base, a rocker arm, and a handle. The rocker arm and handle are hinged to the base, with one end of the handle fixed to one end of the rocker arm. A pressure assembly is mounted on the lower side of the rocker arm, and a fixed seat is mounted on the lower end of the pressure assembly. The pressure assembly is usually spring-loaded, and the rocker arm is a spring-loaded rocker arm. During operation, the base is fixedly mounted on the main shaft of the spinning machine, and the corresponding rollers are fixed to the fixed seats. Then, the handle and rocker arm are pressed down, and under the action of the pressure assembly, each roller is pressed tightly against its corresponding roller with a certain pressure. The yarn is located between the roller and the roller, thus drafting the yarn.

[0004] In the existing technology of the tension spinning machine cradle, when the handle and rocker arm are pressed down, the pressure components cause each roller to press against its corresponding roller with a certain pressure. However, because the pressure on the guide roller in the front zone does not reach the intended pressure, the yarn vibrates greatly during operation, resulting in yarn evenness and cotton particle alarm yarn. This makes the vibration of the tension spinning sliver obvious during operation, which seriously affects the yarn quality. Summary of the Invention

[0005] The purpose of this application is to provide a device for improving the quality of compact spinning yarn, in order to solve the technical problem in the prior art where the pressure on the guide roller in the front area of ​​the cradle of the compact spinning machine does not reach the intended pressure, resulting in large vibrations of the yarn during operation, leading to alarms for yarn evenness and cotton particles, and causing obvious vibrations of the compact spinning yarn during operation, which seriously affects the quality of the yarn.

[0006] The present invention provides an apparatus for improving the quality of compact spun yarn, comprising a pressure spring, a pressure assembly, a guide roller, a first roller, and a drafting assembly;

[0007] One end of the pressure spring is connected to the top of the pressure assembly, and the other end is connected to the top of the guide roller, for applying a vertically downward pressure to the guide roller;

[0008] The first roller and the guide roller are arranged vertically and rotate simultaneously. The contact point between the first roller and the guide roller when they rotate simultaneously is used to guide the yarn to the drafting assembly.

[0009] The drafting assembly is connected to the pressure assembly and is used to draft the yarn.

[0010] Preferably, the drawing assembly includes a plurality of drawing units arranged in parallel;

[0011] Each drafting unit includes a second roller and a drafting skin roller;

[0012] The stretching roller is connected to the pressure assembly;

[0013] The second roller and the drafting roller are arranged vertically and rotate simultaneously. The point where the second roller and the drafting roller rotate simultaneously is used to draft the yarn.

[0014] Preferably, it also includes an aggregation component;

[0015] The agglomeration assembly includes an agglomerator, a negative pressure tube, and a mesh ring;

[0016] The collector is connected to the guide roller and the stretching roller respectively, and one end of the pressure spring is connected to the collector on the guide roller;

[0017] The mesh ring is fitted around the outside of the negative pressure tube, and the first roller is installed inside the negative pressure tube.

[0018] Preferably, the compression spring includes a connecting section, a conducting section, and a force-applying section;

[0019] One end of the connecting segment is connected to the pressurizing component, and the other end is connected to one end of the conducting segment, and the angle between the connection point of the connecting segment and the conducting segment is an obtuse angle;

[0020] The other end of the transmission section is connected to the force application section, and the force application section is connected to the collector on the guide roller.

[0021] Preferably, the force-applying section has a circular structure.

[0022] Preferably, the downward vertical pressure applied by the pressure spring to the guide roller is 10N-20N.

[0023] Preferably, the downward vertical pressure applied by the pressure spring to the guide roller is 15N.

[0024] The device for improving the quality of compact spun yarn of the present invention has the following advantages compared with the prior art:

[0025] The device for improving the quality of spun yarn of the present invention can be improved on the existing cradle without the need to reprocess a new cradle, thus reducing costs. Furthermore, by using a pressure spring to apply a predetermined pressure to the guide roller, the yarn runs smoothly and yarn vibration is reduced, thereby significantly improving the quality of the obtained yarn. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the device for improving the quality of compact spun yarn according to an embodiment of the present invention.

[0027] In the diagram: 1 is the pressure assembly; 2 is the pressure spring; 3 is the collector; 4 is the guide roller; 5 is the negative pressure tube; 6 is the mesh ring; 7 is the second roller; and 8 is the drafting roller. Detailed Implementation

[0028] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0029] This invention provides a device for improving the quality of compact spun yarn, such as... Figure 1 As shown, it includes a pressure spring 2, a pressure assembly 1, a guide roller 4, a first roller, and a drafting assembly;

[0030] One end of the pressure spring 2 is connected to the top of the pressure assembly 1, and the other end is connected to the top of the guide roller 4. It is used to apply a vertically downward pressure to the guide roller 4. The vertical pressure applied by the pressure spring 2 to the guide roller 4 is 10N-20N, preferably 15N. In this embodiment of the invention, the pressure assembly 1 is a spring pressure assembly. One end of the pressure spring 2 is set at the top of the spring in the spring pressure assembly, so that when the spring is pressed down, it drives the other end of the pressure spring 2 to apply a vertically downward pressure to the guide roller 4.

[0031] In this embodiment of the invention, the compression spring is an integral structure, including a connecting section, a conducting section, and a force-applying section; wherein the conducting section is disposed between the connecting section and the force-applying section;

[0032] One end of the connecting section is connected to the pressurizing component, and the other end is connected to one end of the conducting section;

[0033] The angle between the conductor section and the connecting section at the connection point is an obtuse angle;

[0034] The other end of the transmission section is connected to the force application section, which is a circular structure. The circular structure of the force application section allows it to have a large contact area with the guide roller 4, and the circular structure is more stable, thus ensuring uniform force application. This allows the guide roller 4 to reach the intended pressure, and the pressure is stable during operation, without pressure fluctuations due to vibration.

[0035] The compression spring in this embodiment is made of carbon steel, which has high strength and hardness, thereby ensuring the uniformity and stability of the applied force.

[0036] The first roller and the guide roller 4 are arranged vertically and rotate simultaneously. The point where the first roller and the guide roller 4 rotate simultaneously is used to guide the yarn to the drafting assembly. The drafting assembly is connected to the pressure assembly 1 and is used to draft the yarn.

[0037] The drawing assembly includes multiple drawing units arranged in parallel;

[0038] Each drafting unit includes a second roller 7 and a drafting skin roller 8;

[0039] The stretching roller 8 is connected to the pressurizing assembly 1, and the center of the traction roller 8 and the center of the guide roller 4 are on the same horizontal line.

[0040] The second roller 7 and the drafting roller 8 are arranged vertically and roll simultaneously. The joint between the second roller 7 and the drafting roller 8 when they roll simultaneously is used to draft the yarn. At the same time, the center point of the second roller 7 and the center point of the first roller are on the same horizontal line.

[0041] The apparatus for improving the quality of compact spun yarn according to embodiments of the present invention further includes a gathering component;

[0042] The agglomeration assembly includes an agglomerator 3, a negative pressure tube 5, and a mesh ring 6;

[0043] The collector 3 is connected to the guide roller 4 and the stretching roller 8 respectively, and one end of the pressure spring is connected to the collector on the guide roller;

[0044] The mesh ring 6 is fitted outside the negative pressure pipe 5, and the first roller is installed inside the negative pressure pipe 5.

[0045] The device for improving the quality of spun yarn of the present invention can be improved on the original cradle without the need to reprocess a new cradle, thus reducing costs. Furthermore, since the pressure spring 2 applies the intended pressure to the guide roller 4, the yarn runs smoothly and the yarn vibration is reduced, thereby greatly improving the quality of the obtained yarn.

[0046] The working process of the device for improving the quality of compact spun yarn according to an embodiment of the present invention is as follows:

[0047] The rotational power of the first roller in the negative pressure tube 5, after being pressurized between itself and the guide roller 4, drives the mesh ring 6 to rotate. The total pressure of the pressurizing assembly 1, 190N, is divided by the collector 3, resulting in a working pressure of 145N for the drafting roller 8 and 45N for the original working pressure of the guide roller 4. Combined with the pressure of the pressure spring 2, this brings the working pressure of the guide roller 4 to 60N. This increased working pressure of the guide roller 4 to 60N overcomes the friction between the mesh ring 6 and the negative pressure tube 5, ensuring that the mesh ring 6 rotates at a uniform speed along the small roller in the negative pressure tube 5. This results in smooth yarn operation and significantly reduced yarn vibration.

[0048] Because the pressure spring 2 has a reaction force during operation, which will affect the pressure on the drafting roller 8, the working height of the cradle must be adjusted appropriately according to the corresponding product and applied flexibly. This ensures that the grid ring 6 runs smoothly while also ensuring the smooth operation of the drafting assembly and stable quality indicators.

[0049] The existing pressure application method for the guide roller 4 has a flaw: it applies pressure via a spring in the main drafting roller 8, resulting in a relatively small torque. This spring, after experiencing elastic fatigue, significantly impacts the guide roller 4 in the aggregation zone. In the cradle's locked state (normal operating state), the spring height is essentially fixed based on the cradle's working height. This ensures stable pressure on the guide roller, effectively guaranteeing smooth operation of the mesh ring 6 and preventing sliver jitter and brief pauses in the aggregation zone.

[0050] In use, the embodiments of the present invention only require simple modifications to the original cradle of the Jinsai spinning machine. The operation is simple and the cost is low. The specific modifications are as follows: remove the pile roller frame in the front area of ​​the cradle of the Jinsai spinning machine, install the pressure spring 2 between the guide roller 4 and the pressure component 1; adjust the pressure of the guide roller 4 in the front area of ​​the cradle, and then adjust the working height of the cradle with a special front gauge (thickness of 6mm).

[0051] The method for preparing yarn using the apparatus of the present invention for improving the quality of compact spun yarn includes:

[0052] Step 1: Select raw materials, including lyocell fiber and / or viscose fiber, wherein the specification of lyocell fiber is 1.56dtex*38mm.

[0053] Step 2: The raw roving is further refined into a tubular yarn by a spinning machine, the model of which is JWF152. It is also applicable to compact spinning machines with the same type of cradle.

[0054] Step 3: The yarn from Step 2 is wound into yarn again using a winding machine, which is the finished Lyocell, viscose or Lyocell / viscose blended yarn. The winding machine model is ISPERO automatic winding machine.

[0055] Since the device of the present invention can solve the problem of yarn evenness and cotton grain alarm yarn caused by large vibration during yarn operation, the yarn prepared by it has significantly reduced yarn evenness CV, thickness and thinness, and cotton knots, and the alarm yarn is significantly reduced, thus significantly improving work efficiency and yarn quality.

[0056] The effectiveness of the device of the present invention will be verified below with more specific embodiments.

[0057] Example 1:

[0058] Raw material selection: Lyocell fiber specifications 1.56dtex*38mm;

[0059] Adding a pressure spring: Remove the original yarn roller frame in the front area of ​​the cradle of the Tightening Spinning Machine, and install the pressure spring between the cradle body and the pressure assembly; adjust the pressure of the guide roller in the front area of ​​the cradle, and then adjust the working height of the cradle using a special front gauge (6mm thick). When the pressure of the guide roller in the front area of ​​the Tightening Spinning Machine is less than 45N, it will cause the yarn to shake left and right or pause briefly during operation. By placing a pressure spring between the cradle and the pressure assembly, making it contact the front end of the collector, the deformation of the pressure spring provides pressure, increasing the working pressure of the guide roller to 60N.

[0060] The yarn is spun and wound to obtain 16S Lyocell yarn. The spinning process parameters are as follows: mechanical draft ratio of 60 times, yarn twist of 90 twists / 10cm, and yarn twist coefficient of 350.

[0061] Example 2:

[0062] Raw material selection: Lyocell fiber specifications 1.56dtex*38mm;

[0063] Adding a pressure spring: Remove the original yarn roller frame in the front area of ​​the cradle of the Tightening Spinning Machine, and install the pressure spring between the cradle body and the pressure assembly; adjust the pressure of the guide roller in the front area of ​​the cradle, and then adjust the working height of the cradle using a special front gauge (6mm thick). When the pressure of the guide roller in the front area of ​​the Tightening Spinning Machine is less than 45N, it will cause the yarn to shake left and right or pause briefly during operation. By placing a pressure spring between the cradle and the pressure assembly, making it contact the front end of the collector, the deformation of the pressure spring provides pressure, increasing the working pressure of the guide roller to 60N.

[0064] The yarn is spun and wound to obtain 20S Lyocell yarn. The spinning process parameters are as follows: mechanical draft ratio of 65, yarn twist of 92 twists / 10cm, and yarn twist coefficient of 360.

[0065] Example 3:

[0066] Raw material selection: Lyocell fiber specifications 1.56dtex*38mm;

[0067] Adding a pressure spring: Remove the original yarn roller frame in the front area of ​​the cradle of the Tightening Spinning Machine, and install the pressure spring between the cradle body and the pressure assembly; adjust the pressure of the guide roller in the front area of ​​the cradle, and then adjust the working height of the cradle using a special front gauge (6mm thick). When the pressure of the guide roller in the front area of ​​the Tightening Spinning Machine is less than 45N, it will cause the yarn to shake left and right or pause briefly during operation. By placing a pressure spring between the cradle and the pressure assembly, making it contact the front end of the collector, the deformation of the pressure spring provides pressure, increasing the working pressure of the guide roller to 60N.

[0068] The yarn is spun and wound to obtain 21S Lyocell yarn. The spinning process parameters are as follows: mechanical draft ratio of 70 times, yarn twist of 95 twists / 10cm, and yarn twist coefficient of 370.

[0069] Example 4:

[0070] Raw material selection: Lyocell fiber specifications 1.56dtex*38mm;

[0071] Adding a pressure spring: Remove the original yarn roller frame in the front area of ​​the cradle of the Tightening Spinning Machine, and install the pressure spring between the cradle body and the pressure assembly; adjust the pressure of the guide roller in the front area of ​​the cradle, and then adjust the working height of the cradle using a special front gauge (6mm thick). When the pressure of the guide roller in the front area of ​​the Tightening Spinning Machine is less than 45N, it will cause the yarn to shake left and right or pause briefly during operation. By placing a pressure spring between the cradle and the pressure assembly, making it contact the front end of the collector, the deformation of the pressure spring provides pressure, increasing the working pressure of the guide roller to 60N.

[0072] Fine spinning and winding yield 30S Lyocell yarn. The spinning process parameters are: fine spinning mechanical draft ratio 75, yarn twist 100 twists / 10cm, and yarn twist coefficient 380.

[0073] Example 5:

[0074] Raw material selection: Lyocell and viscose fiber, specifications 1.56dtex*38mm;

[0075] Adding a pressure spring: Remove the original yarn roller frame in the front area of ​​the cradle of the Tightening Spinning Machine, and install the pressure spring between the cradle body and the pressure assembly; adjust the pressure of the guide roller in the front area of ​​the cradle, and then adjust the working height of the cradle using a special front gauge (6mm thick). When the pressure of the guide roller in the front area of ​​the Tightening Spinning Machine is less than 45N, it will cause the yarn to shake left and right or pause briefly during operation. By placing a pressure spring between the cradle and the pressure assembly, making it contact the front end of the collector, the deformation of the pressure spring provides pressure, increasing the working pressure of the guide roller to 60N.

[0076] Fine spinning and winding yield 30S Lyocell yarn. The spinning process parameters are: fine spinning mechanical draft ratio 75, yarn twist 100 twists / 10cm, and yarn twist coefficient 380.

[0077] Testing revealed that after adding a pressure spring to the front area of ​​the cradle on the compact spinning machine, the coefficient of variation (CV) of yarn dryness, fineness, thickness, neps, and single yarn strength of Lyocell and Lyocell / viscose blended yarns of different counts in Examples 1-5 were all improved, thus increasing work efficiency and yarn quality. This technology is also applicable to compact spinning machines with the same type of cradle.

[0078] Table 1 Quality parameters of Lyocell and its blended yarns and single yarns in Examples 1-5

[0079]

[0080]

[0081] As can be seen from Table 1, the yarn prepared using the compression spring has significantly reduced yarn dryness CV, thickness and thinness, and neps, and the number of alarm yarns is significantly reduced. The work efficiency and yarn quality are significantly improved, and it has strong operability.

[0082] The above description is merely a few embodiments of this application and is not intended to limit this application in any way. Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any changes or modifications made by those skilled in the art without departing from the scope of the technical solution of this application using the disclosed technical content are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A device for improving the quality of compact spun yarn, characterized in that, The pressure spring sheet, the pressure assembly, the guide leather roller, the first roller and the drafting assembly are arranged in sequence. One end of the pressure spring sheet is connected with the top end of the pressure assembly, and the other end is connected with the top end of the guide leather roller, for applying vertical downward pressure to the guide leather roller. The first roller and the guide leather roller are arranged in sequence and roll at the same time, and the joint of the first roller and the guide leather roller when rolling at the same time is used for guiding the yarn to the drafting assembly. The drafting assembly is connected with the pressure assembly, for drafting the yarn. The pressure spring sheet comprises a connecting section, a conducting section and a force applying section. One end of the connecting section is connected with the pressure assembly, and the other end is connected with one end of the conducting section, and the included angle of the connecting section and the conducting section is obtuse. The other end of the conducting section is connected with the force applying section. The drafting assembly comprises a plurality of drafting units arranged in parallel; each drafting unit comprises a second roller and a drafting leather roller. The drafting leather roller is connected with the pressure assembly; the second roller and the drafting leather roller are arranged in sequence and roll at the same time, and the joint of the second roller and the drafting leather roller when rolling at the same time is used for drafting the yarn. Further comprising a condensing assembly; the condensing assembly comprises a condenser, a negative pressure pipe and a mesh ring. The condenser is connected with the guide leather roller and the drafting leather roller respectively; one end of the pressure spring sheet is connected with the condenser on the guide leather roller. The mesh ring is sleeved outside the negative pressure pipe, and the first roller is arranged in the negative pressure pipe. The vertical downward pressure applied by the pressure spring sheet to the guide leather roller is 15N. The rotation power of the first roller in the negative pressure pipe drives the mesh ring to rotate after being pressed between the guide leather roller, and the total pressure of the pressure assembly is 190N, the working pressure of the drafting leather roller is 145N after being divided by the condenser, and the original working pressure of the guide leather roller is 45N, plus the pressure of the pressure spring sheet, so that the working pressure of the guide leather roller is 60N; the working pressure of the guide leather roller is increased to 60N, which can overcome the friction force between the mesh ring and the negative pressure pipe, ensure the mesh ring to rotate at a constant speed according to the linear speed of the first roller in the negative pressure pipe, and make the yarn run smoothly and the yarn shaking obviously improved.

2. The device for improving the quality of compact-spun yarn according to claim 1, wherein The structure of the force applying section is a circular ring.

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