Production method of blended slub yarn

Abstract

The invention discloses a production method of blended slub yarn. The production method is characterized by comprising the steps of raw material preparation, simple blowing-carding, uniform drawing and optional slub roving, ring roving, slub spinning and ring spinning. Dacron and viscose are selected as raw materials and mixed by cotton bales; the simple blowing-carding unit is sequentially subjected to disc bale plucking, mixed cotton opening, porcupine cotton opening, automatic cotton supplying and cotton carding to obtain polyester-viscose mixed slivers; two processes are adopted for uniform drawing, so that the sliver quality is optimized; the production method has the beneficial effects that the blended slub yarn with the rich fancy effect can be produced, the fiber mixing uniformity and the yarn quality stability are improved, the production cost is reduced, and the requirements of the market for the high-quality and diversified blended slub yarn are met.

Description

Technical Field

[0001] This invention relates to the field of textile technology, and specifically to a method for producing blended slub yarn. Background Technology

[0002] Slub yarn, a type of fancy yarn with irregular slub-like thickness, possesses a unique structure that endows fabrics with distinctive appearance and performance, making it highly popular in the market. In today's textile industry, consumer demands for fabrics and apparel are increasingly diversified, pursuing not only aesthetics but also comfort, functionality, and other performance aspects. Blended slub yarn can combine the characteristics of different fibers to meet these diverse needs. However, existing blended slub yarn production methods still have some problems in practical operation. For example, some production methods have complex processes, leading to high production costs; some methods have poor control over fiber blending uniformity, affecting the stability of yarn quality; and some methods are overly dependent on equipment during production, where even minor differences or malfunctions can have a significant impact on yarn quality. Therefore, developing a blended slub yarn production method that is simple in process, cost-controllable, and can guarantee yarn quality is of significant practical importance. Summary of the Invention

[0003] The purpose of this invention is to provide a method for producing blended slub yarn, which improves the uniformity of fiber mixing and reduces production costs by optimizing the production process, while ensuring that the yarn has good quality and a unique slub style, so as to meet the market demand for high-quality and diversified blended slub yarn.

[0004] To solve the above problems, the technical solution of the present invention is: a method for producing blended slub yarn, characterized by comprising the following steps: Raw material preparation: Polyester fiber and viscose fiber are selected, a single label is used, and the mixing ratio is controlled by cotton bale mixing method; Simplified cleaning and combing process: The cotton is sequentially processed through disc picking, mixed opening, porcupine opening, automatic cotton feeding and combing processes to obtain polyester-viscose blended strips; Uniform drawing: A two-stage drawing process is adopted. The first stage produces eight polyester-viscose mixed strips into semi-cooked polyester-viscose mixed strips, and the second stage produces eight semi-cooked polyester-viscose mixed strips into fully cooked polyester-viscose mixed strips. The total draw ratio of both drawing stages is greater than the total number of strips fed in. Slub roving process: The polyester-viscose blend sliver is fed into a roving frame with a slub device, and the parameters of slub length, slub spacing, and slub thickness are set to produce polyester-viscose slub roving; Ring spinning process: The polyester-viscose slub roving is fed into a regular ring spinning machine, and the draft ratio, twist parameters and ambient temperature and humidity are set to produce blended slub yarn.

[0005] Furthermore, in the preparation of the raw materials, the polyester fiber has a strength of 4.5 cNdtex and an elastic recovery rate of 85%, the viscose fiber has a moisture absorption of 13%, and the mixing ratio of polyester to viscose is 60:40.

[0006] Furthermore, in the disc cotton-grabbing process, the cotton-grabbing trolley rotates at a speed of 1.2 rpm, the cotton-grabbing beater rotates at a speed of 900 rpm, the blade extends 3 mm beyond the rib, and the beater descends 3 mm intermittently.

[0007] Furthermore, in the cotton mixing process, the corner nail curtain runs at a speed of 8 mm / min, the cotton leveling roller rotates at a speed of 300 rpm, and the dust bar spacing is 8 mm.

[0008] Furthermore, in the porcupine cotton-opening process, the porcupine beater rotates at 800 rpm and the dust bar spacing is 10 mm.

[0009] Furthermore, in the automatic cotton feeding process, the pressure of the intermittent air compression mechanism is 0.3 MPa, the intermittent time is 5 s, the forward cotton feeding speed of the cotton box is 6 mm / min, and the cotton storage capacity of the lower cotton box is 20 kg.

[0010] Furthermore, in the carding process, the licker-in speed is 800 rpm, the distance between the licker-in and the feed plate is 0.3 mm, the distance between the licker-in and the cylinder is 0.18 mm, and the distance between the cylinder and the flat plate is 0.2 mm.

[0011] Furthermore, in the uniform drawing process, the total draft ratio of the first drawing pass is 8.5 times, the roller speed is 300 mm / min, and the flare diameter is 4 mm; the total draft ratio of the second drawing pass is 8 times.

[0012] Furthermore, in the slub roving process, the roving length is 50-60mm, the roving pitch is 300-350mm, the roving thickness is 200%-220%, the roving machine draft ratio is 4.8-5 times, and the twist is 3.5-3.8 twists / m.

[0013] Furthermore, in the ring spinning process, the spinning machine spindle speed is 12000 rpm, the draft ratio is 30, the twist is 80 twists / m, the ambient temperature is 25°C, and the humidity is 65%.

[0014] The advantages of this invention compared to existing technologies are: (1) This invention produces blended slub yarn with rich fancy effects by mixing viscose fiber and polyester fiber in cotton-bundled manner and combining them through various processes, such as different combinations of slub roving and ring spinning, ring spinning roving and slub yarn or slub roving and slub yarn, to meet the market demand for diversified yarns.

[0015] (2) The precise cotton bale mixing method is adopted in the raw material preparation stage, and the fine cotton grabbing, multiple opening and mixing methods are used in the cleaning and combing process to ensure the uniform mixing of polyester fiber and viscose fiber throughout the production process, thereby improving the stability of yarn quality and reducing quality problems caused by uneven fiber mixing.

[0016] (3) The adoption of a simplified combing and cleaning unit reduces the need for manual operation, thereby lowering labor costs and the occurrence of dangerous situations. At the same time, by optimizing the production process, unnecessary procedures and equipment investment are reduced, further reducing production costs and improving the company's economic benefits. Detailed Implementation

[0017] The specific embodiments of the present invention will be further described below with reference to examples. Identical components are indicated by the same reference numerals.

[0018] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to directions in the embodiments, while the terms “inner” and “outer” refer to directions toward or away from the geometric center of a specific component, respectively.

[0019] To make the content of this invention easier to understand, the technical solutions in the embodiments of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Example 1

[0020] Raw material preparation Polyester fibers with a strength of 4.5 cNdtex and an elastic recovery rate of 85% are selected, along with viscose fibers with a moisture absorption of 13% and good color fastness. The blend is based on a polyester:viscose ratio of 60:40, using stable, single-label raw materials to ensure sufficient raw material reserves to meet production needs.

[0021] Simple combing couplet Disc-type cotton grabbing: Polyester bales and viscose bales are placed on the disc of a disc-type cotton grabbing machine in a specific ratio. The rotation speed of the cotton grabbing trolley is set to 1.2 rpm, the speed of the cotton grabbing beater is set to 900 rpm, the distance the blade extends beyond the ribs is 3 mm, and the intermittent descent distance of the beater is 3 mm. During the cotton grabbing process, the cotton grabbing trolley makes full contact with the fiber bales, achieving fine cotton grabbing and uniform mixing. Blending and opening: The corner nailing curtain inside the blending and opening machine runs at 8 mm / min, horizontally laying and vertically picking up the flat fiber layer. Under the interaction of the corner nailing curtain and the pressing curtain, the fibers are fully opened. The speed of the leveling roller is set to 300 rpm, and the dust bar spacing is adjusted to 8 mm to effectively remove impurities and short fibers. Porcupine cotton opener: The porcupine beater speed is set to 800 rpm, and the dust bar spacing is 10 mm. The fibers are fully opened and impurities are removed in the porcupine cotton opener. Impurities are discharged through the impurity conveying curtain, and short fibers are discharged through the cotton outlet. Automatic cotton feeding: An intermittent air compression mechanism is used, with pneumatic control parameters set to pressure 0.3 MPa and intermittent time 5 seconds. The forward feeding speed of the cotton box is 6 mm / min, and the degree of gentle opening is achieved by adjusting the pressure and speed of relevant components to ensure minimal fiber damage. The cotton storage capacity of the lower cotton box is maintained at 20 kg to ensure the uniformity of the output cotton. Carding: The licker-in speed is 800 rpm, the distance between the licker-in and the feed plate is 0.3 mm, the distance between the licker-in and the cylinder is 0.18 mm, and the distance between the cylinder and the flats is 0.2 mm. Through the coordinated action of these components, fiber carding and impurity removal are completed, resulting in a high-quality polyester / viscose blend sliver.

[0022] Uniformly drawn strips First drawing: Eight polyester-viscose blended strips are fed into the drawing frame, with a total draft ratio of 8.5. The drawing frame roller speed is 300 mm / min, and the bell diameter is 4 mm to ensure initial uniform mixing of the strips; The second drawing process involves feeding in 8 semi-cooked polyester-viscose mixed strands, with the total draw ratio adjusted to 8. Roller speed and other parameters are fine-tuned according to actual conditions to produce a fully cooked polyester-viscose mixed strand.

[0023] Slub roving process Polyester-viscose blend sliver is fed into a roving frame equipped with a slub device. The slub device is set with a segment length of 50 mm, a segment pitch of 300 mm, and a segment diameter of 200%. The roving frame has a draft ratio of 5 and a twist of 3.5 twists, producing polyester-viscose slub roving. Ring spinning process Polyester-viscose slub roving was fed into a ring spinning frame. The spinning frame was set to a spindle speed of 12,000 rpm, a draft ratio of 30, and a twist of 80 twists per meter. The yarn was spun into a blended slub yarn at 25°C and 65% humidity. Testing showed that the blended slub yarn had a strength of 3.8 cNtex, a yarn evenness (CV) of 12%, and exhibited a clear and uniform slub effect, meeting the requirements for high-quality yarn.

[0024] The present invention and its embodiments have been described above. This description is not restrictive, and the embodiments shown are only one of the embodiments of the present invention. The actual structure is not limited to this. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A method for producing blended slub yarn, characterized in that: Includes the following steps: Raw material preparation: Polyester fiber and viscose fiber are selected, a single label is used, and the mixing ratio is controlled by cotton bale mixing method; Simplified cleaning and combing process: The cotton is sequentially processed through disc picking, mixed opening, porcupine opening, automatic cotton feeding and combing processes to obtain polyester-viscose blended strips; Uniform drawing: A two-stage drawing process is adopted. The first stage produces eight polyester-viscose mixed strips into semi-cooked polyester-viscose mixed strips, and the second stage produces eight semi-cooked polyester-viscose mixed strips into fully cooked polyester-viscose mixed strips. The total draw ratio of both drawing stages is greater than the total number of strips fed in. Slub roving process: The polyester-viscose blend sliver is fed into a roving frame with a slub device, and the parameters of slub length, slub spacing, and slub thickness are set to produce polyester-viscose slub roving; Ring spinning process: The polyester-viscose slub roving is fed into a regular ring spinning machine, and the draft ratio, twist parameters and ambient temperature and humidity are set to produce blended slub yarn.

2. The method for producing a blended slub yarn according to claim 1, characterized in that: In the preparation of the raw materials, the polyester fiber has a strength of 4.5 cNdtex and an elastic recovery rate of 85%, the viscose fiber has a moisture absorption of 13%, and the mixing ratio of polyester to viscose is 60:

40.

3. The method for producing a blended slub yarn according to claim 1, characterized in that: In the disc cotton-grabbing process, the cotton-grabbing trolley rotates at a speed of 1.2 rpm, the cotton-grabbing beater rotates at a speed of 900 rpm, the blade extends 3 mm beyond the rib, and the beater descends 3 mm intermittently.

4. The method for producing a blended slub yarn according to claim 1, characterized in that: In the cotton mixing process, the corner nail curtain runs at a speed of 8 mm / min, the cotton leveling roller rotates at a speed of 300 rpm, and the dust bar spacing is 8 mm.

5. The method for producing a blended slub yarn according to claim 1, characterized in that: In the porcupine cotton-opening process, the porcupine beater rotates at 800 rpm and the dust bar spacing is 10 mm.

6. The method for producing a blended slub yarn according to claim 1, characterized in that: In the automatic cotton feeding process, the pressure of the intermittent air compression mechanism is 0.3 MPa, the intermittent time is 5 s, the forward cotton feeding speed of the cotton box is 6 mm / min, and the cotton storage capacity of the lower cotton box is 20 kg.

7. The method for producing a blended slub yarn according to claim 1, characterized in that: In the carding process, the licker-in speed is 800 rpm, the distance between the licker-in and the feed plate is 0.3 mm, the distance between the licker-in and the cylinder is 0.18 mm, and the distance between the cylinder and the flat plate is 0.2 mm.

8. The method for producing a blended slub yarn according to claim 1, characterized in that: In the uniform drawing process, the total draft ratio of the first drawing pass is 8.5 times, the roller speed is 300 mm / min, and the bell diameter is 4 mm; the total draft ratio of the second drawing pass is 8 times.

9. The method for producing a blended slub yarn according to claim 1, characterized in that: In the slub roving process, the roving length is 50-60mm, the roving pitch is 300-350mm, the roving thickness is 200%-220%, the roving machine draft ratio is 4.8-5 times, and the twist is 3.5-3.8 twists / m.

10. A method for producing blended slub yarn according to claim 1, characterized in that: In the ring spinning process, the spinning machine spindle speed is 12000 r / min, the draft ratio is 30, the twist is 80 twists / m, the ambient temperature is 25℃, and the humidity is 65%.