Feeding roller and rotor spinning machine

Abstract

The utility model discloses a feeding roller and a rotor spinning machine, and relates to the technical field of spinning. A plurality of bead groups are fixedly arranged on the outer side wall of the roller shaft, the bead groups are circumferentially and uniformly distributed around the axis of the roller shaft, and a spacing is formed between every two adjacent bead groups; the bead group comprises at least one first bead, and the first bead extends along the axis of the roller shaft; and in the circumferential direction of the roller shaft, the circumferential length of the interval is consistent with the circumferential length of one rib group. And finally, the nub effect of the prepared hemp-feeling yarn is better.

Description

Technical Field

[0001] The utility model relates to the technical field of textiles, in particular to a feeding roller and a rotor spinning machine. Background Art

[0002] Flax fiber possesses rapid moisture absorption and release, and its ability to permeate moisture rapidly. Therefore, linen products effectively regulate the thermal and moisture balance between the human body and the environment, rapidly draining both vaporous and liquid perspiration from the fabric, maintaining a constant temperature and humidity balance. This ensures excellent wearability and comfort. Linen products possess unique characteristics in terms of luster, drape, and texture. The irregular, mixed polygonal cross-section of flax fibers creates diffuse reflectivity in both yarn and fabric, resulting in a softer hue. The fabric appears rugged and bold, with thick sections ranging from 3 to 15 cm in length and 1.6 to 2.3 times the thickness of the yarn. This creates a natural, elegant drape, a natural texture, a soft hue, and a crisp, elegant appearance. However, due to the complex wet-spinning process, minimal automation, high labor intensity, and poor workshop conditions, degumming and bleaching can be environmentally polluting. Furthermore, the limited supply of raw flax raw materials makes flax long-spun products very expensive, significantly limiting large-scale wet-spinning production and failing to fully meet consumer demand.

[0003] Using common cotton raw materials and the fast, high-yield rotor spinning process, attempts are being made to produce fabrics with a rougher, more defined surface and a feel similar to wet-spun linen. Due to the spinning mechanism of rotor-spun yarn, fabrics made from this yarn have a stiffer feel, approaching the crisp, dry feel of wet-spun linen. However, due to the limitations of rotor spinning, the rougher sections are generally longer than 30 cm, resulting in a rougher, lower-quality appearance. Visually, the fabric lacks the delicate, natural feel of wet-spun linen, resulting in a less pronounced numbness.

[0004] Therefore, it is particularly important to improve existing equipment and optimize the thick section effect of pure cotton yarn fabrics through rotor spinning technology so that their appearance and style are closer to linen wet-spun fabrics. Utility Model Content

[0005] The purpose of the utility model is to provide a feeding roller and a rotor spinning machine to solve the problems existing in the above-mentioned prior art and make the thick places of the prepared hemp-feeling yarn have better effect.

[0006] To achieve the above purpose, the present invention provides the following solutions:

[0007] The utility model provides a feeding roller, comprising a roller shaft; a plurality of ridge groups are fixedly arranged on the outer side wall of the roller shaft, each of the ridge groups is evenly distributed circumferentially around the axis of the roller shaft, and there is a spacing between two adjacent ridge groups; the ridge group includes at least one first ridge, and the first ridge extends along the axis of the roller shaft; in the circumferential direction of the roller shaft, the circumferential length of the spacing is consistent with the circumferential length of one of the ridge groups.

[0008] The utility model also provides a rotor spinning machine, comprising the feeding roller as described above.

[0009] Compared with the prior art, the utility model has achieved the following technical effects:

[0010] The feeding roller provided by the utility model intentionally changes the friction force on the cotton sliver by arranging a spacing arrangement mode with a spacing interval equal to the length of the ridge group on the roller shaft, so that the cotton sliver is fed unevenly, which helps to locally accumulate the fibers, thereby achieving a spinning effect with short and dense bamboo nodes, enhancing the bamboo node effect formed by air-jet spinning, and making the thick node effect of the obtained hemp-feeling yarn better.

[0011] The utility model also provides a rotor spinning machine, which can achieve the spinning effect of short bamboo by adopting feeding rollers arranged with interval spacing and circumference of rib groups, so that the thick section effect of the obtained hemp yarn is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 A schematic diagram of the surface structure of the feed roller provided by the utility model;

[0014] Figure 2 This is a schematic diagram of the surface structure of a traditional feeding roller;

[0015] Figure 3 This is a schematic diagram of the partial structure of the feed roller provided by the utility model on the rotor spinning machine.

[0016] In the picture:

[0017] 10-feed roller; 11-roller shaft; 12-rib group; 13-first rib; 14-interval spacing;

[0018] 20- lower feeding bell mouth;

[0019] 30- upper feeding bell mouth;

[0020] 40- cotton feeding support plate;

[0021] 50-Combing roller. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] The utility model aims to provide a feeding roller and a rotor spinning machine to solve the problems existing in the prior art and make the thick places of the prepared hemp yarn better.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0025] Example 1

[0026] This embodiment provides a feeding roller 10, such as Figures 1 to 3 As shown, it is mainly but not limited to being used in producing linen yarn from cotton fibers using a rotor spinning machine, and includes a roller shaft 11; a plurality of ridge groups 12 are fixedly provided on the outer wall of the roller shaft 11, and each ridge group 12 is evenly distributed circumferentially around the axis of the roller shaft 11, and there is an interval 14 between two adjacent ridge groups 12; the ridge group 12 includes at least one first ridge 13, and the first ridge 13 extends along the axis of the roller shaft 11; in the circumferential direction of the roller shaft 11, the circumferential length of the interval 14 is consistent with the circumferential length of one ridge group 12.

[0027] By arranging an interval 14 on the roller shaft 11 with the same length as the ridge group 12, the friction force on the cotton strip is deliberately changed, so that the cotton strip is fed unevenly, which helps to locally accumulate the fibers, thereby achieving a spinning effect with short and dense bamboo nodes, enhancing the bamboo node effect formed by air-spinning, and making the thick node effect of the produced hemp yarn better.

[0028] Example 2

[0029] This embodiment provides a rotor spinning machine, including the feed roller 10 as in the first embodiment.

[0030] By adopting the feed roller 10 with the spacing 14 and the circumference of the ridge group 12 being equal, the spinning effect of the short bamboo can be achieved, so that the thick section effect of the obtained hemp yarn is better.

[0031] Specifically, such as Figure 3 As shown, it is a modification carried out on a rotor spinning machine of model Autocoro 9. The modified part involved is the feeding roller 10. The cotton sliver passes through the lower feeding bell mouth 20 and enters the upper feeding bell mouth 30. Then, it is clamped between the feeding roller 10 and the cotton feeding support plate 40. The cotton sliver is fed into the combing roller 50 by the feeding roller 10. The surface of the feeding roller 10 adopts the relevant structural setting of Example 1, which deliberately causes unevenness when the cotton sliver is fed, so as to achieve a spinning effect with short and dense bamboo nodes.

[0032] Example 3

[0033] This embodiment provides a method for producing linen yarn, using cotton fiber as raw material. The process flow includes: cotton blending process - cotton cleaning process - carding process - drawing process - air-spinning process - baling process:

[0034] ① Cotton blending process:

[0035] Among the optional schemes of this embodiment, it is more preferred that in the cotton blending process, compared with the normal cotton blending requirement of fiber length between 26mm-30mm, this scheme uses short fibers with a length of 20mm and long fibers with a length of 32mm, and the ratio of short fibers to long fibers is 70:30.

[0036] Due to the effect of aggregation of fibers of different lengths in the spinning and drafting process, long fibers will be held and moved first during the fiber drafting and slipping process, and short fibers cannot be effectively held. They slide by overcoming the friction between fibers, so they will continue to aggregate to form coarse and fine sections of cotton strips. Therefore, in order to overcome the problem of long bamboo section length in air-spinning itself, when preparing cotton strips, the slip characteristics of fibers of different lengths can be utilized to reasonably specify the cotton long and short fiber matching scheme. Fibers with a length of 20 mm and 32 mm are used in a ratio of 70:30. The speed change characteristics of short fibers during the drafting process are utilized to achieve the purpose of relative aggregation of short fibers, so that the length and coarseness of the coarse sections are more in line with the products of wet-spinning of flax.

[0037] ②Blowing process:

[0038] In the optional solutions of this embodiment, it is more preferred that in the cotton cleaning process, the cotton cleaning process is sequentially through a plucker, a cotton opener, a cotton blender, a fine cotton opener, a foreign fiber machine, and a dust collector. (The traditional cotton cleaning process is plucker-cleaner-opener-blender-fine cotton opener-foreign fiber machine-dust collector. If the traditional cotton cleaning process is used, the influence of cotton dropping may cause the fiber length ratio in the cotton blend to be unbalanced, and the cotton blending effect of 70:30 may not be achieved. Therefore, the cotton cleaning process is changed to plucker-opener-blender-fine cotton opener-foreign fiber machine-dust collector.)

[0039] In the cotton cleaning process, compared with the traditional cotton cleaning process, the impurity remover between the cotton plucker and the cotton opener is removed, thereby reducing the imbalance of long and short fibers in the cotton blending process and maintaining a cotton blending effect with a long and short fiber ratio of 70:30.

[0040] ③ Carding process:

[0041] In the optional solution of this embodiment, it is more preferred to control the short fibers with SFC(W) less than 12.7 mm to 35% during the carding process. (Under normal circumstances, to ensure the quality of air-spun yarn and the uniformity of the yarn, the short fibers with SFC(W) less than 12.7 mm are controlled to 30% during the carding process.)

[0042] In the carding process, the short fibers with SFC (W) below 12.7 mm are controlled at 35%, which can make the slubs tighter and shorter. The carding noil effect is intentionally adjusted to ensure the slub effect, so that the slub effect is more in line with the coarse appearance style of linen.

[0043] ④ Drawing process:

[0044] In the optional scheme of this embodiment, it is more preferred that in the drawing process, the drawing gauge of the drawing frame is set to 50mm*53mm (that is, the front drawing gauge is 50mm, and the rear drawing gauge is 53mm; the secondary drawing gauge here is the same as the roller gauge).

[0045] The drafting gauge is adjusted from the original 40mm*48mm to 50mm*53mm, which can deliberately prepare irregular cotton strips with more coarse and fine strips in the drawing process, assist in controlling the length and pitch of bamboo spinning in the subsequent air-spinning process, and enhance the yarn-forming effect of the hemp-feeling yarn finally formed in the air-spinning process.

[0046] ⑤ Air-spinning process:

[0047] In the optional solutions of this embodiment, it is more preferred to use a rotor spinning machine as in the second embodiment in the air-spinning process.

[0048] Specifically, air-jet spun linen yarn relies on air-jet slub spinning, but is restricted by the problem of large length and pitch of the knots, making it difficult to achieve the linen yarn effect on the fabric surface.

[0049] Therefore, key adjustments are made to the feeding roller 10 of the cotton blending and rotor spinning machine:

[0050] In particular, the surface setting of the feed roller 10 as shown in the first embodiment is used to enhance the slub spinning effect, so that the conventional slub length of the air-spun yarn is more than 30 cm, and the actual slub length is measured to be 10 cm to 18 cm.

[0051] The details are as follows:

[0052]

[0053] ⑥Packaging process:

[0054] In the optional scheme of this embodiment, it is more preferred that a packaging process is further included after the air-spinning process, and the packaging process is to package the linen yarn generated in the air-spinning process.

[0055] In the air-spinning process, the hemp yarn produced by the rotor spinning machine can be packaged through the packaging process to facilitate subsequent handling and other processing.

[0056] Specifically, after the relevant adjustments and settings in the above-mentioned processes, the yarn can be spun with a length of 5 cm to 18 cm and a thickness of 1.6 to 2.1 times the thick section. The appearance style of the resulting yarn fabric is very close to the linen wet-spun fabric. Therefore, the yarn product formed is air-spun linen slub yarn, that is, linen yarn.

[0057] Among them, regarding other related instructions:

[0058] The method for producing hemp yarn in this embodiment is based on the corresponding adjustment settings on the basis of the production method of traditional air-spun slubby yarn (except for the adjustments mentioned above, other setting parameters are the same as the setting parameters of traditional air-spun slubby yarn), so as to achieve the production effect of hemp yarn. The means of implementation and the principle support are to control and improve the speed change law in the process of fiber drafting: during the drafting process, fibers of different lengths will show different speed change laws. This phenomenon is mainly affected by factors such as fiber length, drafting multiple, roller spacing and friction force boundary distribution. The following is an analysis of the speed change law of drafting fibers of different lengths:

[0059] 1. Speed ​​change law of long fibers

[0060] When long fibers change speed in the drafting zone, they usually exhibit the following characteristics:

[0061] ① Speed ​​changes are concentrated and close to the front jaw: Since the tail end of long fibers is more susceptible to the friction of the rear jaw during the drafting process, while the head end enters the control area of ​​the front jaw more quickly, the speed change point of long fibers is often closer to the front jaw. This speed change feature allows the long fibers to be better straightened and dispersed during the drafting process, thereby improving the uniformity of the yarn.

[0062] ② Significant guiding force: In the drafting zone, long fibers are more susceptible to the guiding force of surrounding fast fibers, thus accelerating their progress. This acceleration makes the long fibers more stable during the speed change process, reducing yarn quality problems caused by uneven speed change.

[0063] 2. Speed ​​change law of short fibers

[0064] Compared with long fibers, short fibers have different speed changes during the drawing process:

[0065] ① Dispersed speed changes and distance from the front jaw: Due to their short length, the tail end of staple fibers is less affected by the friction of the rear jaw during drafting, while the leading end is more easily controlled by the gripping force of the front jaw. Therefore, the speed change point of staple fibers is often farther from the front jaw, and the speed change process is relatively dispersed. This speed change characteristic makes staple fibers more prone to entanglement and irregular movement during drafting, thus affecting yarn uniformity and quality.

[0066] ② Obvious control force: In the drafting zone, short fibers are more susceptible to the control force of the surrounding slow fibers, thus maintaining a slower movement speed. This control force makes it more difficult for short fibers to change speed, requiring a greater drafting force to produce relative movement.

[0067] 3. Analysis of influencing factors

[0068] 1. Fiber length: Fiber length is the most direct factor affecting speed change. Due to its length advantage, long fibers are more susceptible to guiding forces during the drafting process, accelerating their speed; while short fibers are more susceptible to controlling forces, maintaining a slower speed.

[0069] ② Draft ratio: The larger the draft ratio, the more intense the relative movement between fibers and the more obvious the speed change process. However, it is also important to control the draft ratio within a reasonable range to avoid problems such as fiber breakage or excessive neps.

[0070] ③ Roller Gauge: The size of the roller gauge also affects the speed change of the fiber. When the gauge is too large, the interaction between the fibers is weakened, and the speed change process becomes smoother; when the gauge is too small, it may lead to problems such as entanglement and breakage of the fibers.

[0071] ④ Friction boundary distribution: A reasonable distribution of the friction boundary is crucial for the fiber's speed change process. By adjusting the strength and distribution of the friction boundary, the fiber's speed change point and speed can be controlled, resulting in a yarn product with more stable quality.

[0072] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A feeding roller, characterized in that: Including roller shaft; A plurality of ridge groups are fixedly provided on the outer side wall of the roller shaft, and the ridge groups are evenly distributed circumferentially around the axis of the roller shaft, and there is a spacing between two adjacent ridge groups; The ridge group includes at least one first ridge, and the first ridge extends along the axis of the roller shaft; In the circumferential direction of the roller shaft, the circumferential length of the spacing interval is consistent with the circumferential length of one ridge group.

2. A rotor spinning machine, characterized in that: Comprising the feed roller as claimed in claim 1.

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