A low-torque spinning device

Abstract

The present invention discloses a low-torque spinning device, belonging to the technical field of textile engineering. It includes a device body assembled on a flyer tube. The device body is divided into a false-twist area and a connecting part. The connecting part is assembled on the flyer tube. The connecting part is arranged as a hollow or solid cylindrical structure, and the false-twist area is arranged as a solid spherical or frustum structure. A plurality of convex strips are evenly arranged on the outer side of the false-twist area. By adopting the low-torque spinning device with the above structure, the friction between the convex strips arranged on the outer side of the false-twist area and the yarn during the rotation of the device achieves the effect of false twisting, thereby enhancing the strength of the yarn near the triangle area, reducing breakage, and improving the situation that too many breakages occur in the triangle area during low-torque spinning and spinning cannot be carried out. The structure of this device is simple and easy to use. Assembling this device on the flyer tube and using the rotation of the flyer tube to drive the rotation of this device, no other transmission device is required, saving energy.

Description

Technical Field

[0001] The present invention relates to the technical field of textile engineering, and particularly to a low-torque spinning device. Background Art

[0002] The torsional deformation of knitted fabrics is a common problem in single-sided plain knitted fabrics. It not only affects the beauty of fabrics and garments, but also reduces the cutting utilization rate of knitted fabrics. Research at home and abroad shows that the torsional deformation of knitted fabrics is mainly caused by the residual torque of the yarn. In order to improve the torsional deformation of knitted fabrics and reduce the residual torque of the yarn, the currently commonly used method is low-torque spinning technology, that is, using various false-twist devices to change the arrangement of fibers inside the yarn, so that the yarn can be smoothly spun under lower twist and torque conditions, and finally low-twist yarn is obtained. Specifically, there are the following methods: (1) By using the rotation of the roller, the yarn rolls tangentially due to the frictional driving force, so that the yarn strip obtains corresponding false twist, and finally the torque of the yarn is reduced. Although this method is simple and easy to implement, the effect of reducing twist is not significant enough, and there are problems such as a decrease in torsional stress and a corresponding decrease in the strength of the yarn strip; (2) Using a single belt drive to make the yarn strip rotate and obtain false twist. This method can reduce the yarn twist coefficient by 22% - 35%, but it is necessary to require that the joint of the belt is smooth and has high joint strength. If the joint is poor, it will damage the machine parts and the belt, and as the linear density of the yarn decreases, the breakage rate of the yarn increases rapidly; (3) Install a false-twist device with two upper and lower belts between the front roller and the yarn guide of a traditional ring spinning frame to false-twist the yarn. This device uses two false-twist points, and the false-twist efficiency is significantly higher than that of a single-belt false-twist device with only one false-twist point, and the production efficiency is high. However, due to the use of two upper and lower belts, it is inconvenient for yarn splicing and doffing, and the power consumption of the device is large.

[0003] In view of the above defects of the prior art, the present invention provides a low-torque spinning device that can be installed on a bobbin. Summary of the Invention

[0004] The purpose of the present invention is to provide a low-torque spinning device, which uses the friction between the convex strips arranged outside the false-twist area when the device rotates and the yarn to achieve the effect of false twist, thereby enhancing the strength of the yarn near the triangle area, reducing breakage, and improving the situation where too many breakages occur in the triangle area during low-torque spinning and spinning cannot be carried out. The structure of this device is simple and easy to use. Assembling this device on the bobbin and using the rotation of the bobbin to drive the rotation of this device, no other transmission devices are required, saving energy.

[0005] To achieve the above object, the present invention provides a low-torque spinning device, including a device body assembled on a flyer bobbin. The device body is divided into a false-twist area and a connecting part. The connecting part is assembled on the flyer bobbin. The connecting part is provided as a hollow or solid cylindrical structure. The false-twist area is provided as a solid spherical or frustum structure. A plurality of ridges are evenly arranged on the outer side of the false-twist area.

[0006] Preferably, when the false-twist area is a spherical structure, the maximum diameter is 12 - 22 mm.

[0007] Preferably, when the false-twist area is a frustum structure, the top diameter is 10 - 14 mm, the bottom diameter is 16 - 22 mm, the vertical height is 4 - 10 mm, and the angle between the side of the false-twist area and the horizontal plane is 30 - 60°.

[0008] Preferably, the outer diameter of the connecting part is 6 - 12 mm, and the cylindrical height of the connecting part is 10 - 40 mm.

[0009] Preferably, the shape of the ridge is rhombic or arc-shaped, the number is 4 - 12, the height of the ridge perpendicular to the outer wall of the false-twist area is 0.25 - 2 mm, the length of the ridge parallel to the outer wall of the false-twist area is 1 - 5 mm, the vertical distance between the top of the ridge and the top of the false-twist area is 1 - 9 mm, and the width of the ridge is 0.5 - 2.5 mm.

[0010] Therefore, the present invention adopts a low-torque spinning device with the above structure. By using the friction between the ridges arranged on the outer wall during the rotation of the device and the yarn to achieve the effect of false-twisting, the strength of the yarn near the triangle area is enhanced, the number of broken ends is reduced, and the situation where too many broken ends in the triangle area during low-torque spinning makes spinning impossible is improved. Moreover, the structure of this device is simple and easy to use. It can be fixed on the flyer bobbin through the connecting part, and the rotation of the flyer bobbin drives the rotation of this device, without the need to set up other transmission devices separately, saving energy.

[0011] Next, through the drawings and embodiments, the technical solutions of the present invention will be further described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of Embodiment 1 of a low-torque spinning device of the present invention;

[0013] Figure 2 is a schematic structural diagram of Embodiment 2 of a low-torque spinning device of the present invention;

[0014] Figure 3 is a schematic structural diagram of Embodiment 3 of a low-torque spinning device of the present invention;

[0015] Figure 4Front view of an embodiment of a low-torque spinning device of the present invention assembled on a spinning frame;

[0016] Figure 5 Left view of an embodiment of a low-torque spinning device of the present invention assembled on a spinning frame;

[0017] Reference numerals:

[0018] 1, false-twist area; 2, rib; 3, connecting part; 4, bobbin; 5, yarn guide hook; 6, front roller; 7, yarn strand. Detailed implementation manners

[0019] The technical solutions of the present invention will be further described below with reference to the drawings and embodiments.

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0021] As Figures 1 - 3 shown, the present invention provides a low-torque spinning device, including a device body assembled on a bobbin. The outer diameter value parameter of the connecting part of the device body is determined by the top port diameter of the bobbin 4. The device body is divided into a false-twist area 1 and a connecting part 3. The connecting part 3 is set as a hollow or solid cylindrical structure. The outer diameter of the cylinder of the connecting part 3 is the same as the top port diameter of the bobbin 4, which is 9 - 11 mm, and the cylinder height of the connecting part 3 is 10 - 40 mm.

[0022] The false-twist area 1 is set as a solid sphere or frustum structure. When the false-twist area 1 is a sphere structure, the maximum diameter of the false-twist area 1 is 12 - 22 mm. A plurality of ribs 2 are evenly arranged on the outer side of the false-twist area 1. The number of ribs 2 is 4 - 12. The shape of the rib 2 is rhombic or arc-shaped. The height of the rib 2 perpendicular to the outer wall of the false-twist area 1 is 0.25 - 2 mm. The length of the rib 2 parallel to the outer wall of the false-twist area 1 is 1 - 5 mm. The vertical distance between the top of the rib 2 and the top of the false-twist area 1 is 1 - 5 mm. The width of the rib 2 is 0.5 - 2.5 mm.

[0023] As Figure 1 shown, in order to avoid excessive friction between the yarn strand 7 and the surface of the device body when passing through the device body and increasing the number of broken ends, the outer edge of the false-twist area 1 and the surface of the rib 2 are both set as smooth rounded corners. At the same time, the false-twist efficiency can be controlled by changing parameters such as the shape, size, and height of the rib 2. If a yarn with a very low twist is to be spun, measures such as appropriately increasing the height of the rib 2 and reducing the size of the rounded corner can be taken to improve the false-twist efficiency.

[0024] As Figures 4 - 5 shown, in order to ensure that the sliver 7 can closely adhere to the rib 2 outside the false-twist area 1, it is necessary to determine the diameter of the false-twist area 1, ensure that the size of the rib is within an appropriate range, and at the same time, the position of the rib 2, the surface morphology of the rib 2, etc. will all affect the adhesion of the sliver 7 to the rib 2. As Figure 4 shown, after the sliver 7 is output from the front roller 6 nip and passes through the yarn guide hook 5 to reach the device body, in order to ensure that the sliver 7 can closely adhere to the rib surface and the device and the yarn guide hook will not collide during the entire spinning process of the roving, it is necessary to analyze the shape and size of the top of the balloon, make the maximum diameter of the false-twist area slightly larger than the diameter of the formed balloon, and ensure that the top of the device will not contact the yarn guide hook when the dragon tendon rises to the highest position. In addition, if the false-twist area is set as a frustum of a cone, its angle needs to be determined according to the shape of the top of the balloon to ensure that the balloon can adhere to the side surface of the frustum of a cone. Regarding the shape of the false-twist area, it can be determined according to the specific twist of the spun yarn. If the twist of the spun yarn is small, it can be designed as a frustum of a cone to increase the contact range between the sliver 7 and the false-twist area 1 and improve the false-twist efficiency. If the spun twist is larger, using a sphere can ensure smooth contact between the sliver 7 and the false-twist area 1 and make the spinning process more stable.

[0025] Example 1

[0026] Cotton yarn with a linear density of 30 tex and a twist factor of 240 is spun on a spinning frame. As Figure 1 shown, the outer diameter of the connection part of the device body is 10 mm, the false-twist area is a sphere with a diameter of 16 mm, and the height of the cylinder of the connection part is 22 mm. The number of ribs is 8, the cross-sectional shape is triangular, the height is 1.5 mm, the length is 3 mm, the width is 1 mm, and the center of the rib is located on the largest circumference of the sphere of the false-twist area. The yarn forming performance is shown in Table 1.

[0027] Example 2

[0028] Cotton yarn with a linear density of 15 tex and a twist factor of 200 is spun on a spinning frame. As Figure 2 shown, the outer diameter of the device body is 10 mm, the false-twist area is a frustum of a cone with a vertical height of 6 mm, a top diameter of 12 mm, and a bottom diameter of 20 mm, and the height of the cylinder of the connection part is 25 mm. The number of ribs is 12, the cross-sectional shape is triangular, the height is 2 mm, the length is 4 mm, the width is 1 mm, and the vertical distance from the center of the rib to the top surface of the frustum of a cone is 3 mm. The yarn forming performance is shown in Table 1.

[0029] Example 3

[0030] Cotton yarn with a linear density of 45 tex and a twist factor of 280 is spun on a spinning frame. As Figure 3As shown, the outer diameter of the device body is 10 mm, the false-twist area is a sphere with a diameter of 15 mm, and the height of the cylinder in the connecting part is 19 mm. The number of ribs is 4, the cross-sectional shape is elliptical, the minor semi-axis is 0.8 mm, and the major semi-axis is 1.5 mm. The centers of the ribs are located on the largest circumference of the sphere in the false-twist area. The yarn-forming performance is shown in Table 1.

[0031] As can be seen from Table 1, when spinning cotton yarn with the same twist factor, compared with traditional ring spinning, the end-breakage rate and yarn twist potential are significantly reduced by using the low-torque spinning method proposed in this paper. In addition, the low-twist spinning method proposed in the present invention can spin cotton yarn with a twist factor as low as 200, while traditional ring spinning cannot form yarn smoothly. Therefore, this device can be used to produce low-torque yarn.

[0032] Table 1 Comparison between low-twist spinning and traditional ring spinning

[0033]

[0034] —Indicates that yarn cannot be formed smoothly

[0035] Therefore, a low-torque spinning device of the present invention utilizes the friction between the ribs provided on the inner wall during the rotation of the device and the yarn to achieve the effect of false twist, thereby enhancing the strength of the yarn near the triangle area, reducing end breakage, and improving the situation where too many end breakages occur in the triangle area during low-torque spinning and yarn cannot be spun; moreover, this device has a simple structure and is easy to use. It can be fixed on the flyer by the connecting part, and the rotation of the flyer drives the rotation of this device, without the need to set up other transmission devices separately, saving energy.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A low-torque spinning device, characterized in that: It includes a device body assembled on a flyer bobbin. The device body is divided into a false-twist area and a connecting part. The connecting part is assembled on the flyer bobbin. The connecting part is arranged as a hollow or solid cylindrical structure. The false-twist area is arranged as a solid spherical or frustum structure. A plurality of ribs are evenly arranged on the outer side of the false-twist area.

2. The low-torque spinning device according to claim 1, characterized in that: When the false-twist area is a spherical structure, the maximum diameter is 12 - 22 mm.

3. The low-torque spinning device according to claim 1, characterized in that: When the false-twist area is a frustum structure, the top surface diameter is 10 - 14 mm, the bottom surface diameter is 16 - 22 mm, the vertical height is 4 - 10 mm, and the angle between the side of the false-twist area and the horizontal plane is 30 - 60°.

4. The low-torque spinning device according to claim 1, characterized in that: The outer diameter of the connecting part is 6 - 12 mm, and the cylindrical height of the connecting part is 10 - 40 mm.

5. The low-torque spinning device according to claim 4, characterized in that: The shape of the rib is rhombic or arc-shaped, and the number is 4 - 12. The height of the rib perpendicular to the outer wall of the false-twist area is 0.25 - 2 mm, the length of the rib parallel to the outer wall of the false-twist area is 1 - 5 mm, the vertical distance between the top of the rib and the top of the false-twist area is 1 - 9 mm, and the width of the rib is 0.5 - 2.5 mm.

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