WO2021088150A1

WO2021088150A1 - Core spun yarn homogenizing device and method

Info

Publication number: WO2021088150A1
Application number: PCT/CN2019/120671
Authority: WO
Inventors: 孙玉钗; 俞金键; 程中浩; 王春花; 张光宇
Original assignee: 江苏华佳丝绸股份有限公司
Priority date: 2019-11-06
Filing date: 2019-11-25
Publication date: 2021-05-14
Also published as: CN110644100A

Abstract

A core spun yarn homogenizing device and method. The device comprises a yarn unwinding assembly, a first roller (3), a second roller (4), a third roller (5), and a yarn winding assembly that are sequentially connected. The method comprises: using the first roller (3) to perform yarn unwinding on a core spun yarn to be adjusted, and then pulling the core spun yarn; stretching the yarn by means of the second roller (4); and after retracting the yarn by means of the third roller (5), winding the yarn to obtain an adjusted core spun yarn.

Description

Core-spun yarn leveling device and method

This disclosure claims the priority of a Chinese patent application filed with the Chinese Patent Office with an application number of 201911078227.7 on November 6, 2019, and the entire content of the above application is incorporated into this disclosure by reference.

Technical field

This application belongs to the technical field of yarn spinning, for example, it relates to a core-spun yarn leveling device and method.

Background technique

Core-spun yarn is also called composite yarn or covered yarn. It is a composite yarn composed of two or more kinds of fibers. The yarn wrapped inside is called the core material, and it is wrapped on the outside. The yarn of the core material is called the outer yarn. Among them, the first core-spun yarns were short fibers and short-fiber core-spun yarns developed with cotton fiber as the sheath and polyester spun yarn as the core. However, there are many types of core-spun yarns, which can be divided into low elasticity according to the elasticity of the core-spun yarns. Elastic core-spun yarn and high-elastic core-spun yarn. The former refers to the use of less elastic fibers in the inner core material, and the resulting final product has less elasticity. The latter refers to the use of high elastic fibers in the inner core material. , The outer fiber is generally low-elastic fiber, which is compatible with the high elasticity of the inner core fiber, and the final product formed has a large elasticity.

For core-spun yarns with low-elastic outer yarns covered with high-elastic inner core yarns, due to the large difference in elasticity of the inner and outer layers of yarns, when the inner core high-elastic yarns shrink after yarn formation, the length of the outer covering yarns will be caused. Excessive and uneven tangled loops are formed on the surface of the core-spun yarn, which makes the yarn appearance quality problem, but there is no better solution at present. CN 204959160U discloses a new type of spandex yarn covering device, which includes a drive shaft, a first feeding wheel, a yarn core, a second feeding wheel, a reel, a first roller, a conveyor belt, a second roller, a second guide coil, Spandex, rotating disc, tangent belt, tension adjustment wheel, adjustment shaft, spindle and first guide coil. In this device, the roller draws the reel to control the draft ratio of the yarn core spandex, control the traction coefficient to be consistent, and improve the product quality. The device is mainly to improve and adjust the covering yarn preparation process, and does not involve the adjustment of surface loops or knots formed after shrinking.

CN 205775052U discloses a controllable core yarn tension device, which includes a body, a connecting rod, a core yarn tube, a tensioner, a tension arm, a rubber pad, an iron sheet, a core yarn hole, an electromagnetic chuck, a pressure sensor, a controller, and a guide. Silk wheel, front roller, middle roller, rear roller, bell mouth, core-spun yarn drum; the device controls the tension of the core yarn through a tensioner, and automatically adjusts it according to changes in working conditions, but does not involve the difference in elasticity of the core-spun yarn The state of the core yarn and the outer yarn changes when the tension changes.

To sum up, there is no way to adjust the surface condition of the core-spun yarn after it is formed in the related art. Regarding the adjustment of the appearance state of the core-spun yarn composed of high-elastic core yarn and low-elastic outer yarn, it is necessary to seek New solution.

Summary of the invention

The present application provides a core-spun yarn leveling device and method. The device re-stretches and shrinks the core-spun yarn after forming the yarn, especially for the core-spun yarn composed of high-elastic core yarn and low-elastic outer yarn. The surface condition is adjusted so that the protrusions or knots formed on the surface of the outer yarn due to the difference in elasticity of the inner core yarn and the outer yarn can be uniformly distributed, and the quality and appearance of the core yarn are fully improved.

This application adopts the following technical solutions:

The present application provides a core-spun yarn leveling device, which includes a yarn unwinding assembly, a first roller, a second roller, a third roller, and a yarn winding assembly that are sequentially connected.

In this application, the device is to reprocess the core-spun yarn after the yarn is wound. After unwinding, the core-spun yarn is re-stretched and contracted by a roller, and the high-elastic yarn of the inner layer and the outer layer are used to re-stretch and shrink the core-spun yarn. When the low elastic yarn shrinks, the shrinkage of the inner and outer yarns is the same, so that the yarn bulges or knots formed on the surface of the yarn due to the surplus of the outer yarn length are uniformly distributed, which fully improves the quality and appearance of the yarn; The device has simple structure, simple operation and good adjustment effect.

The yarn unwinding assembly sequentially includes a yarn tube to be adjusted and a first yarn guide ring.

The center lines of the yarn tube to be adjusted and the first yarn guide ring are located on the same vertical line, so that the yarn is guided out in the best posture.

The distance between the upper end of the bobbin to be adjusted and the first yarn guide ring is between 1.5 times the maximum diameter of the upper end of the bobbin to be adjusted and 2 times the maximum diameter of the lower end of the bobbin to be adjusted. The lower end diameter is larger than the maximum upper end diameter, so 2 times the maximum lower end diameter of the yarn tube to be adjusted is greater than 1.5 times the maximum upper end diameter, such as 1.5 times, 1.8 times, 2 times the maximum upper end diameter of the yarn tube, and the largest lower end diameter of the yarn tube 1.5 times, 1.8 times, or 2 times, etc., but not limited to the listed values, and other unlisted values within this range of values are also applicable.

In this application, the setting of the distance between the yarn tube and the first yarn guide ring is to be adjusted to ensure that the balloon formed when the yarn is drawn out is in good condition, so that the unwound yarn passes through the upper part of the yarn tube and when it is unwound from the yarn tube There is no additional friction with the surface of the bobbin, preventing the uneven tension state caused by the additional friction with the surface of the bobbin during the unwinding process of the yarn; this is because the high-elastic core-spun yarn is sensitive to force and suffers The uneven external force will produce uneven deformation and affect the adjustment effect of the yarn state.

The first roller, the second roller and the third roller independently include a top roller and a bottom roller.

The bottom roller is actively driven, and the top roller is passively driven.

In this application, the rollers are all arranged in groups, one active transmission and one passive transmission, and the latter is driven to rotate by the friction on the surface of the former.

The linear velocity of the second roller is greater than the linear velocity of the first roller and the third roller, and the linear velocity of the first roller and the third roller are the same.

In this application, the first roller determines the speed at which the core-spun yarn is drawn through the setting of the linear speed; then, the linear speed of the second roller is set to be greater than the linear speed of the first roller, so that the yarn is further subjected to the process of passing through the second roller. A greater degree of stretching, that is, both the inner core yarn and the outer covering yarn are fully stretched, and the linear speed of the second roller should be determined according to the stretching degree of the outer yarn of the core yarn to make the outer yarn Full extension of the thread is the standard for determining the speed; the linear speed of the third roller is set to be the same as that of the first roller, so that after the third roller, the core-spun yarn is reduced to the initial stretched state. After the speed is reduced, the core-spun yarn relaxes and the inner layer The high-elastic yarn and the low-elastic yarn of the outer layer shrink at the same time, but due to the same shrinkage state of the yarn during the adjustment process, there is no uneven shrinkage between different yarn segments due to the different friction states on the surface of the bobbin in the normal state The problem, the protrusions or knots on the yarn surface can be evenly distributed, improving the appearance of the core-spun yarn.

The yarn winding assembly sequentially includes a second yarn guide ring and an adjusted yarn drum.

In this application, the positional relationship between the second yarn guide ring and the adjusted bobbin is determined according to the manner in which the adjusted yarn is wound on the bobbin. When the adjusted yarn adopts the winding method of the bobbin rotating , The center lines of the adjusted yarn drum and the second yarn guide ring are located on the same vertical line to ensure that the package condition of the adjusted yarn drum is good; when the adjusted yarn adopts the second yarn guide to rotate around the yarn drum In the method, the center lines of the adjusted yarn tube and the second yarn guide ring are not on the same vertical line.

The distance between the upper end of the adjusted bobbin and the second yarn guide ring is more than 2 times the maximum diameter of the upper end of the adjusted bobbin, such as 2 times, 2.5 times, 3 times, 3.5 times, or 4 times, but not limited to For the listed values, other unlisted values within the range of values are also applicable.

In the present application, the adjusted yarn is wound into a yarn drum through the second yarn guide ring to form the final package; in the package process, the package can be packaged by the active rotation of the yarn drum , It can also form a package by actively rotating around the yarn drum through the second yarn guide ring.

After adjusting the setting of the distance between the yarn drum and the second yarn guide ring, it can ensure that the yarn package is in good condition and the yarn package is packaged smoothly when the yarn package is in different positions of the yarn drum, and no unreasonable external force will be generated. It causes uneven deformation of the yarn to be packaged, which affects the adjustment effect of the yarn state. During the yarn winding process, because the yarn winding speed is constant, the yarn stress is uniform, and the relative position relationship between the inner and outer layers of the yarn is consistent. It can further adjust the surface of the yarn protrusion or the even distribution of yarn knots. Consistent, can fully improve the quality and appearance of the yarn.

The application also provides a method for leveling the core-spun yarn using the above-mentioned device, which includes:

The core-spun yarn to be adjusted uses the first roller for yarn unwinding and then is pulled out, then re-stretched by the second roller, and then retracted by the third roller to wind the yarn to obtain the adjusted core-spun yarn.

The elasticity of the core material yarn in the core-spun yarn is greater than the elasticity of the outer-wrap yarn.

The material of the core yarn includes any one or a combination of at least two of polyurethane fibers, polyetherester fibers or polyolefin fibers. A typical but non-limiting example of the combination is: a combination of polyurethane fibers and polyetherester fibers , The combination of polyetherester fiber and polyolefin fiber, the combination of polyurethane fiber, polyetherester fiber and polyolefin fiber, etc.

The material of the outer covering yarn includes any one or a combination of at least two of natural fibers, synthetic fibers or man-made fibers. Typical but non-limiting examples of the combination include: a combination of natural fibers and synthetic fibers, synthetic fibers and man-made fibers The combination of natural fiber, synthetic fiber and man-made fiber, etc.

In this application, a wide range of fiber types can be selected for the wrapping yarn, but the choice should be such that its elasticity is less than that of the corresponding core yarn.

The core-spun yarn to be adjusted is guided by the first yarn guide ring, the yarn tube to be adjusted is fixed, and the first roller applies force to unwind the yarn from the yarn tube to be adjusted.

The linear velocity of the second roller is greater than the linear velocity of the first roller.

The linear speed of the second roller is 1.5-10 times the linear speed of the first roller, such as 1.5 times, 2 times, 3 times, 4 times, 5 times, 6 times, 8 times, or 10 times, etc., but not only Limited to the listed values, other unlisted values within this range of values are also applicable, and can be 2 to 5 times.

Optionally, the linear velocity of the third roller is the same as the linear velocity of the first roller.

The yarn winding is to wind the adjusted core-spun yarn onto the adjusted bobbin via the second yarn guide ring.

The yarn winding is realized by adjusting the rotation of the rear yarn drum.

The yarn winding is realized by the rotation of the yarn drum after the second yarn guide is circumnavigated and adjusted.

The device described in the present application re-stretches and shrinks the core-spun yarn after yarn formation, adjusts its surface state, makes the yarn knots or protrusions on the surface uniformly distributed, and fully improves the quality and appearance of the core-spun yarn , Especially suitable for core-spun yarn composed of high-elastic core yarn and low-elastic outer yarn;

The device described in the present application has a simple structure, simple operation, and a good effect of adjusting the appearance of the core-spun yarn.

Description of the drawings

Fig. 1 is a schematic structural diagram of a core-spun yarn leveling device provided in Example 1 of the present application.

In the figure, 1-yarn tube to be adjusted, 2-first yarn guide ring, 3-first roller, 4-second roller, 5-third roller, 6-second yarn guide ring, 7-after adjusting yarn tube .

Detailed ways

Hereinafter, the application will be further described in detail with specific embodiments in conjunction with the accompanying drawings.

The specific implementation part of the application provides a core-spun yarn leveling device and method. The device includes a yarn unwinding assembly, a first roller 3, a second roller 4, a third roller 5, and a yarn winding assembly that are sequentially connected. Pieces.

The method includes:

The core-spun yarn to be adjusted is unwound by the first roller 3 and then pulled out, then re-stretched by the second roller 4, and then retracted by the third roller 5 to wind the yarn to obtain the adjusted Of core-spun yarn.

Example 1:

This embodiment provides a core-spun yarn leveling device. The structural diagram of the device is shown in FIG. 1, and includes a yarn unwinding assembly, a first roller 3, a second roller 4, a third roller 5, and a yarn unwinding assembly connected in sequence. Yarn winding assembly.

The yarn unwinding assembly sequentially includes a bobbin to be adjusted 1 and a first yarn guide ring 2; the center lines of the bobbin to be adjusted 1 and the first yarn guide ring 2 are located on the same vertical line; The distance between the upper end of the yarn drum 1 and the first yarn guide ring 2 is twice the maximum diameter of the upper end of the yarn drum 1 to be adjusted.

The first roller 3, the second roller 4, and the third roller 3 independently include a top roller and a bottom roller; the bottom roller is actively driven, and the top roller is passively driven.

The linear velocity of the second roller 4 is greater than the linear velocity of the first roller 3 and the third roller 5, and the linear velocity of the first roller 3 and the third roller 5 are the same.

The yarn winding assembly sequentially includes a second yarn guide ring 6 and an adjusted yarn tube 7; the center lines of the adjusted yarn tube 7 and the second yarn guide ring 6 are located on the same vertical line; The distance between the upper end of the yarn drum 7 and the ring of the second yarn guide 6 is 3 times the diameter of the maximum upper end of the yarn drum 7 after adjustment.

Example 2:

This embodiment provides a core-spun yarn leveling device, which includes a yarn unwinding assembly, a first roller 3, a second roller 4, a third roller 5, and a yarn winding assembly that are sequentially connected.

The yarn unwinding assembly sequentially includes a bobbin to be adjusted 1 and a first yarn guide ring 2; the center lines of the bobbin to be adjusted 1 and the first yarn guide ring 2 are located on the same vertical line; The distance between the upper end of the yarn drum 1 and the first yarn guide ring 2 is 1.5 times the maximum diameter of the upper end of the yarn drum 1 to be adjusted.

The yarn winding assembly sequentially includes a second yarn guide ring 6 and an adjusted yarn drum 7; the adjusted yarn drum 7 is fixed, and the second yarn guide ring 6 can rotate around the adjusted yarn drum 7; The distance between the upper end of the adjusted yarn drum 7 and the ring of the second yarn guide 6 is twice the diameter of the largest upper end of the adjusted yarn drum 7.

Example 3:

The yarn unwinding assembly sequentially includes a bobbin to be adjusted 1 and a first yarn guide ring 2; the center lines of the bobbin to be adjusted 1 and the first yarn guide ring 2 are located on the same vertical line; The distance between the upper end of the yarn drum 1 and the first yarn guide ring 2 is twice the maximum lower end diameter of the yarn drum 1 to be adjusted.

The yarn winding assembly sequentially includes a second yarn guide ring 6 and an adjusted yarn tube 7; the center lines of the adjusted yarn tube 7 and the second yarn guide ring 6 are located on the same vertical line; The distance between the upper end of the yarn drum 7 and the ring of the second yarn guide 6 is 4 times the diameter of the maximum upper end of the yarn drum 7 after adjustment.

Example 4:

This embodiment provides a core-spun yarn leveling method, which is carried out in the device of embodiment 1, and includes the following steps:

(1) The core-spun yarn to be adjusted is guided by the first yarn guide ring 2, the yarn tube 1 to be adjusted is fixed, and the first roller 3 applies force to pull the yarn from the yarn tube 1 to be adjusted. After being wound and pulled out, the material of the core yarn of the core-spun yarn is polyurethane fiber, and the outer yarn is selected from fiber filaments with less elasticity than polyurethane;

(2) The yarn guided in step (1) is re-stretched by the second roller 4, and the linear speed of the second roller 4 is 3 times the linear speed of the first roller 3;

(3) The re-stretched yarn in step (2) is retracted by the third roller 5, and the linear speed of the third roller 5 is the same as the linear speed of the first roller 3, and then passes through the second yarn guide ring 6. The yarn is wound on the adjusted bobbin 7, and the yarn is wound by the rotation of the adjusted bobbin 7 to form the adjusted package core-spun yarn.

Example 5:

This embodiment provides a core-spun yarn leveling method, which is carried out in the device of embodiment 2, and includes the following steps:

(1) The core-spun yarn to be adjusted is guided by the first yarn guide ring 2, the yarn tube 1 to be adjusted is fixed, and the first roller 3 applies force to pull the yarn from the yarn tube 1 to be adjusted. After being wound and pulled out, the material of the core yarn of the core-spun yarn is polyetherester fiber, and the outer yarn is selected from staple fiber yarn with less elasticity than polyetherester;

(2) The yarn guided in step (1) is re-stretched by the second roller 4, and the linear speed of the second roller 4 is 1.5 times the linear speed of the first roller 3;

(3) The re-stretched yarn in step (2) is retracted by the third roller 5, and the linear speed of the third roller 5 is the same as the linear speed of the first roller 3, and then passes through the second yarn guide ring 6. The yarn is wound around the rotation of the adjusted bobbin 7 to form the adjusted package core yarn.

Example 6:

This embodiment provides a core-spun yarn leveling method, which is carried out in the device of embodiment 3, and includes the following steps:

(1) The core-spun yarn to be adjusted is guided by the first yarn guide ring 2, the yarn tube 1 to be adjusted is fixed, and the first roller 3 applies force to pull the yarn from the yarn tube 1 to be adjusted. After being wound and pulled out, the core yarn of the core-spun yarn is made of polyolefin fiber, and the outer covering yarn is selected from filaments with less elasticity than polyolefin;

(2) The yarn guided in step (1) is re-stretched by the second roller 4, and the linear speed of the second roller 4 is 8 times the linear speed of the first roller 3;

In the above-mentioned embodiment, the core-spun yarn is unwound, re-stretched, contracted and wound by using the core-spun yarn leveling device, and the ratio of the linear speeds between different rollers is set to realize the inner layer The retraction state of the high-elastic yarn and the low-elastic yarn of the outer layer is consistent, so that the knots or protrusions on the surface of the yarn are evenly distributed, and the appearance and quality of the core-spun yarn are improved.

Claims

A core-spun yarn leveling device includes: a yarn unwinding assembly, a first roller, a second roller, a third roller, and a yarn winding assembly that are sequentially connected.
The core-spun yarn leveling device according to claim 1, wherein the yarn unwinding assembly includes a bobbin to be adjusted and a first yarn guide ring in sequence;

The center line of the yarn tube to be adjusted and the first yarn guide ring are located on the same vertical line;

The distance between the upper end of the yarn tube to be adjusted and the first yarn guide ring is between 1.5 times the maximum upper end diameter of the yarn tube to be adjusted and 2 times the maximum lower end diameter of the yarn tube to be adjusted.
The core-spun yarn leveling device according to claim 1 or 2, wherein the first roller, the second roller and the third roller independently comprise an upper roller and a lower roller;

The bottom roller is actively driven, and the top roller is passively driven.
The core-spun yarn leveling device according to any one of claims 1-3, wherein the linear velocity of the second roller is greater than the linear velocity of the first roller and the third roller, and the linear velocity of the first roller and the third roller The line speed is the same.
The core-spun yarn leveling device according to any one of claims 1 to 4, wherein the yarn winding assembly includes a second yarn guide ring and an adjusted yarn drum in sequence;

The distance between the upper end of the adjusted yarn tube and the second yarn guide ring is more than 2 times the maximum diameter of the upper end of the adjusted yarn tube.
A method for adjusting the core-spun yarn evenly by using the device of any one of claims 1-5, comprising:

The core-spun yarn to be adjusted uses the first roller for yarn unwinding and then is pulled out, then re-stretched by the second roller, and then retracted by the third roller to wind the yarn to obtain the adjusted core-spun yarn.
The method for leveling the core-spun yarn according to claim 6, wherein the elasticity of the core material yarn in the core-spun yarn is greater than that of the outer covering yarn;

The material of the core yarn includes any one or a combination of at least two of polyurethane fiber, polyetherester fiber or polyolefin fiber;

The material of the outer covering yarn includes any one or a combination of at least two of natural fibers, synthetic fibers or man-made fibers.
The core-spun yarn leveling method according to claim 6 or 7, wherein the core-spun yarn to be adjusted is guided by the first yarn guide ring, and the yarn tube to be adjusted is fixed and passes through the first roller Apply force to unwind the yarn from the bobbin to be adjusted.
The method for leveling the core-spun yarn according to any one of claims 6-8, wherein the linear velocity of the second roller is greater than the linear velocity of the first roller;

The linear velocity of the second roller is 1.5-10 times the linear velocity of the first roller;

The linear velocity of the third roller is the same as the linear velocity of the first roller.
The method for leveling the core-spun yarn according to claim 9, wherein the linear speed of the second roller is 2 to 5 times the linear speed of the first roller.
The method for leveling the core-spun yarn according to any one of claims 6-10, wherein the yarn winding is to wind the adjusted core-spun yarn onto the adjusted bobbin via the second yarn guide ring;

The yarn winding is realized by adjusting the rotation of the yarn drum;

The yarn winding is realized by the rotation of the yarn drum after the second yarn guide is circumnavigated and adjusted.