CN113235176A - Drafting roller and spinning assembly for spinning - Google Patents
Drafting roller and spinning assembly for spinning Download PDFInfo
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- CN113235176A CN113235176A CN202110566277.0A CN202110566277A CN113235176A CN 113235176 A CN113235176 A CN 113235176A CN 202110566277 A CN202110566277 A CN 202110566277A CN 113235176 A CN113235176 A CN 113235176A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
- D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
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- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
The invention discloses a drafting roller for spinning and a spinning assembly, wherein the drafting roller for spinning comprises a plurality of arc-shaped end surface rotating blades which are distributed at intervals along the circumferential direction of the drafting roller; the arc end surfaces of the arc end surface rotating blades jointly form the outer side of the circumferential surface of the drawing roller. The peripheral surface of the drafting roller contacted with the tows is formed by the arc-shaped end surfaces of the arc-shaped end surface rotating blades together, so that the tows are actually contacted with the arc-shaped end surfaces of the arc-shaped end surface rotating blades, the drafting roller can greatly reduce the adhesive force of the drafting roller on the floating filaments, the monofilaments or the broken filaments by regulating and controlling the number and the area of contact points or lines between the tows and the roller while realizing the drafting effect on the tows, and the entrainment effect of the tows on the broken filaments, the floating filaments and the broken filaments is highlighted, so that the adhesion phenomenon of the broken filaments and the broken filaments to the roller is eliminated.
Description
Technical Field
The invention belongs to the technical field of spinning equipment, and particularly relates to a drafting roller for spinning and a spinning assembly.
Background
Draft rollers are common devices used in fiber preparation and spinning processes and play a very important role in the fiber forming process. In the wet spinning process and the fine denier yarn drafting process, the drafting rollers often encounter the problem of the winding of broken filaments, and in order to solve the problem and maintain stable production operation, various channels and methods are adopted in the industry for coping with the problem.
One method for solving the problem of the winding of the broken filaments of the drafting roller in the prior art is as follows: from the production process management perspective, the number of broken filaments and uneven filaments in the filament bundle is reduced or the cohesion of the filament bundle is increased by improving the uniformity of raw materials, improving the production control precision or using oil agents and the like, so that the adhesion and winding of broken filaments to the roller surface are reduced. The disadvantages of this method are: this method is very costly to implement, but has little effect.
Another method for solving the problem of the winding of the broken filaments of the drawing roller in the prior art is as follows: enterprises can obtain the relative stability of the production process and the product quality by reducing the drafting multiplying power and increasing the fiber number. The disadvantages of this method are: the fiber performance in terms of fineness and mechanics is sacrificed.
Another method for solving the problem of the winding of the broken filaments of the drawing roller in the prior art is as follows: the adhesion and winding of broken filaments to the roller surface are reduced by improving the smoothness, hardness and abrasion resistance of the drawing roller from the viewpoint of the drawing roller. The disadvantages of this method are: the cost of manufacture, operation and maintenance is high, the improvement effect is limited, and the requirements of further improving the fiber performance and spinning finer fibers cannot be met.
In a word, the prior art has no obvious and direct solution to the problem of the winding of the broken filaments of the drafting roller, which greatly hinders the development and application of the industry in the fields of high mechanical property, fine denier and superfine denier fiber products and limits the upgrading and updating of conventional products and the development and application of differentiated and high-performance products.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a drafting roller for spinning to eliminate the adhesion phenomenon of broken filaments and broken filaments to the drafting roller.
Another object of the present invention is to provide a spinning assembly comprising the above drawing roller for spinning.
In order to solve the technical problems, the invention adopts the technical scheme that:
a drafting roller for spinning comprises a plurality of arc-shaped end surface rotating blades which are distributed at intervals along the circumferential direction of the drafting roller;
the arc end surfaces of the arc end surface rotating blades jointly form the outer side of the circumferential surface of the drawing roller.
Furthermore, the structural parameters of the arc-shaped end surface rotating blades comprise end surface radian, end surface arc chord length, rotating blade end distance and rotating blade number, and various structural parameters of the arc-shaped end surface rotating blades correspond to the arrangement rule and the spinning requirement of the arc-shaped end surface rotating blades.
Furthermore, the radian of the end surface of the arc-shaped end surface rotating blade is less than or equal to 300 degrees.
Furthermore, the distance between the rotating vanes of the two adjacent arc end surfaces is less than or equal to the radius of the drawing roller.
Furthermore, the arc center axis direction of the arc end surface rotating vane is parallel to the roll shaft, and the arc end surface rotating vanes are symmetrically or uniformly distributed around the roll shaft.
Furthermore, a cross angle is formed between the arc central axis direction of the arc end face rotating blades and the roll shaft direction of the drafting roll, the cross angle is not more than 45 degrees, and the arc end face rotating blades are symmetrically or uniformly distributed around the roll shaft.
Further, the arc-shaped end surface rotating blade comprises a body and a coating coated outside the body;
the body is made of metal, ceramic or composite material;
the coating is made of a composite functional material.
Further, the drawing roller for spinning is used for the wet spinning process or the dry-wet spinning process of regenerated cellulose fibers, alginate fibers and chitosan fibers.
Furthermore, the drafting roller for spinning is used for drafting process of fine denier yarns and ultra-fine denier yarns of regenerated cellulose fibers, chinlon, polyester yarns, polypropylene fibers, polyethylene fibers and the like.
Further, the drawing roll for spinning is used alone, in combination of a plurality of drawing rolls, or in combination with other drawing rolls.
A spinning pack comprising a drawing roller for spinning as described above.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
the peripheral surface of the drafting roller contacted with the tows is formed by the arc-shaped end surfaces of the arc-shaped end surface rotating blades together, so that the tows are actually contacted with the arc-shaped end surfaces of the arc-shaped end surface rotating blades, the drafting roller can greatly reduce the adhesive force of the drafting roller on the floating filaments, the monofilaments or the broken filaments by regulating and controlling the number and the area of contact points or lines between the tows and the roller while realizing the drafting effect on the tows, and the entrainment effect of the tows on the broken filaments, the floating filaments and the broken filaments is highlighted, so that the adhesion phenomenon of the broken filaments and the broken filaments to the roller is eliminated. The phenomenon that the broken filaments are wound around the roller can be eliminated, the production stability is improved, and the labor is reduced; the process drafting multiplying power can be improved as much as possible, so that the higher drafting level which cannot be achieved due to a small amount of broken filaments can be achieved, and the mechanical properties of the fibers and the tows can be obviously improved.
The drafting roller has the advantages of being more embodied in the fine denier and superfine denier fiber drawing and refining process, because the fiber is more easily influenced by the adhesion force, the friction force, the micro filament scraping and the filament hanging concave-convex part on the surface of the drafting roller along with the further refining of the fiber, the filament is broken and wound, and the subsequent filament breaking and winding are obviously increased by the slightly broken filament and winding roller, so that the production is unstable and even interrupted. The drafting roller adopting the design scheme can highlight the integrity and the driving performance of large and small tows, remarkably weaken the functions of sticking, scraping and hanging the tows of the roller, and even is not easy to wind the roller under the condition of broken tows, so the drafting roller is more suitable for stable production of fine denier and superfine denier fibers and tows, and is easy to further reduce the titer and improve the comprehensive mechanical property.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic structural diagram of a drafting roller provided by some embodiments of the present invention, D is a distance between adjacent curved end surface rotating vanes, and D is a diameter of the roller.
Fig. 2 is a schematic cross-sectional structure diagram of a drawing roller according to some embodiments of the present invention.
Fig. 3 and 4 show the drafting rollers of the cambered end surface rotating vane with a smaller arc length and the drafting rollers of the cambered end surface rotating vane with a larger arc length in the embodiment of the invention.
FIGS. 5, 6 and 7 are schematic cross-sectional views of the cambered end surface rotating vane provided by the invention with different cambered end surface arc radii, different cambered end surface radians and different cambered end surface arc chord lengths; wherein A is the radian of the arc end face, B is the angle of the circle center of the arc end face corresponding to the center of the roller, and C is the arc chord length of the arc end face.
Fig. 8 is a front view of the structure of fig. 3.
FIG. 9 is a schematic view of a spin pack assembly provided by the present invention.
Fig. 10 is a schematic structural diagram of a drawing roller for spinning according to still other embodiments of the present invention.
Fig. 11 is a view of the structure of fig. 10.
In the figure, 1, a draft roller; 11. a roll shaft; 2. a circumferential surface of the draft roller; 3. rotating the blade at the arc end face, 4, rotating the blade at the arc end face; 5. and (4) carrying out silk bundle.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Aiming at the actual requirements of production, technology, product development and the like, the embodiment of the invention overcomes the defects of the prior technical scheme, provides the spinning drafting roller 1 which can realize the drafting function and simultaneously prevent the broken filaments from sticking and winding, and the drafting roller 1 has the advantages of practical and direct application, remarkable effect and low cost.
Based on the root cause of the phenomenon of wool yarn winding on the roller, the invention provides a brand-new and operable equipment solution from the equipment angle on the premise of not reducing the process performance, increasing the process links and the production operation difficulty, and greatly reduces the adhesion area and the force of wool yarns, weak yarns and uneven yarns on the roller surface by designing and regulating the form and the quantity on the contact point, the contact line and the contact surface of the interaction of the silk yarns 5 and the drawing roller 1, thereby greatly reducing or eliminating the phenomena of wool yarn sticking on the roller and winding on the roller, simultaneously maintaining the necessary interaction between the silk yarns 5 and the roller, meeting the drawing requirement and achieving the drawing purpose.
The outer side of the circumferential surface 2 of the drafting roller provided by the embodiment of the invention is formed by arranging the arc-shaped end surface rotating blades 3 at regular intervals according to a certain arrangement, namely, the arc-shaped end surfaces 4 of the arc-shaped end surface rotating blades 3 jointly form the outer side of the circumferential surface of the drafting roller 1, which is contacted with the tows 5. The structural parameters of the arc-shaped end surface rotating vane 3 comprise an end surface radian, an end surface arc chord length, a rotating vane end distance and a rotating vane number, and various structural parameters of the arc-shaped end surface rotating vane 3 are flexibly designed and customized according to the arrangement rule of the arc-shaped end surface rotating vane 3 and the actual spinning requirement. The chord length of the end face arc, the length of the rotating blades, the distance between the rotating blade ends and the number of the rotating blades are changed along with the size of the whole roller, and various structural parameters need to meet the condition of distribution on the circumference.
The radian of the end surface of the arc-shaped end surface rotating blade 3 is less than or equal to 300 degrees.
The distance between the rotating blades 3 on the two adjacent arc end surfaces is less than or equal to the radius of the drawing roller 1.
In some embodiments of the present invention, the arc central axis direction of the arc end surface rotating vane 3 is parallel to the roller shaft 11, and the arc end surface rotating vanes 3 are symmetrically or uniformly distributed around the roller shaft 11 of the drafting roller 1. In other embodiments of the present invention, the arc center axis direction of the arc end surface rotating blades 3 and the roller axis 11 direction of the drafting roller 1 have a crossing angle α, the crossing angle α is less than or equal to 45 °, and the arc end surface rotating blades 3 are symmetrically or uniformly distributed around the roller axis 11.
The arc-shaped end surface rotating blade 3 comprises a body and a coating coated outside the body. The body of the arc-shaped end surface rotating blade 3 is made of metal, stainless steel, ceramic or composite material; the coating surface of the arc-shaped end surface rotating blade 3 is made of materials with composite functions, such as quartz, rubber, alloy and the like, so that the friction performance of the tows 5 and the arc-shaped end surface 4 is regulated and controlled or the corrosion resistance of the roller body is improved.
The draft roller 1 according to the present invention may be used alone, in combination of a plurality of rollers, or in combination with other rollers.
The drafting roller 1 of the invention can be used for the wet spinning process and the dry spinning process of regenerated cellulose fiber, alginate fiber, chitosan fiber and the like.
The drafting roller 1 can be used for drafting fine denier, ultra-fine denier, high-performance fiber and other varieties and has obvious advantages.
The drawing roller 1 of the invention is different from the drawing roller 1 which is directly grooved on a round roller, and has obvious differences in appearance, structure and use, and the specific differences are as follows:
1) in appearance and structure, the outer side of the circumferential surface 2 of the drafting roller of the embodiment of the invention comprises arc-shaped bulges which are arranged at intervals, and the circular roller is a circular roller which is directly provided with a groove. The contact part between the drawing roller 1 and the filament bundle 5 of the embodiment of the present invention is the arc-shaped protrusion, the contact part is a line as a whole, and the circular roller is a strip or a surface.
2) Functionally, the drafting roller 1 of the embodiment of the invention has the functions of preventing broken filaments from adhering, guiding, enhancing torque and preventing slipping at the same time, and the circular roller mainly has the guiding function.
3) This difference in structure minimizes the contact area between the draft roller 1 of the embodiment of the present invention and the tow 5 in the draft direction, and broken filaments are hard to adhere to the roller, thereby blocking the possibility of occurrence of entangling.
Example 1
Fig. 1 is a schematic cross-sectional view of a drafting roller 1 provided in an embodiment of the present invention, D is a distance between two adjacent curved end surface rotating vanes 3, D is a diameter of the roller, and may also represent a sum of lengths of the two curved end surface rotating vanes 3 in the same radial direction, that is, a radius of the roller is equal to a length of the rotating vane. Fig. 2 shows a drawing roller 1 with a plurality of curved end flaps 3.
Fig. 3 and 4 show a drawing roller 1 of the arc-shaped end surface rotating vane 3 with a smaller arc length and a drawing roller 1 of the arc-shaped end surface rotating vane 3 with a larger arc length respectively in the embodiment of the invention.
Fig. 5, fig. 6, and fig. 7 are schematic diagrams respectively showing cross-sectional dimension marks of the arc-shaped end surface rotating vane 3 according to the embodiment of the present invention, where the cross-sectional dimensions of the arc-shaped end surface rotating vane 3 are respectively the arc radius of the arc-shaped end surface 4, the arc degree of the arc-shaped end surface 4, and the arc chord length of the arc-shaped end surface 4, where a is the arc degree of the arc-shaped end surface 4, B is the angle of the center of the roller corresponding to the arc-shaped end surface 4, and C is the arc chord length of the arc-shaped end surface 4.
The structures in fig. 5, fig. 6 and fig. 7 can be taken as schematic cross-sectional views of the arc-shaped end surface rotating blade 3 of the drafting roller 1 entity provided by the embodiment of the present invention, specifically, the arc-shaped end surface rotating blade 3 with the same rotating blade length, different arc-shaped end surfaces 4 radians, and different arc-shaped end surfaces 4 arc chord lengths.
Fig. 8 shows the arc center axis direction of the arc end surface rotating vane 3 is parallel to the roller shaft 11, and the arc end surface rotating vanes 3 are symmetrically or uniformly distributed around the roller shaft 11.
Fig. 9 is a schematic view of a combination application of the drafting rollers 1 provided by the embodiment of the present invention, as shown in fig. 9, specifically, five drafting rollers 1 with the same specification are symmetrically arranged, tow 5 wound therearound is drawn forward, and the tow 5 is arranged and combined together according to the diagram to form five rollers, the tow 5 is sequentially wound around the rollers, and the five rollers actively rotate to drive the tow 5 to advance.
As shown in fig. 1 to 9, the drafting roller 1 for spinning is formed by arranging arc end surface rotating blades 3 on the outer side of the circumferential surface of the roller, and the end surface radian, the end surface arc chord length, the rotating blade end distance, the rotating blade number, the arrangement mode and the like of the arc end surface rotating blades 3 can be designed and customized according to the actual spinning requirement.
Fig. 10 is a perspective view of the arc-shaped end surface rotating vane 3, which is provided by the embodiment of the present invention, and the arc-shaped central axis direction of the arc-shaped end surface rotating vane 3 is parallel to the roller shaft 11, and the arc-shaped end surface rotating vane 3 is symmetrically or uniformly distributed around the roller shaft 11. As shown in fig. 3 and 8, the arc angle of the rotating blade 3 on the arc end face of the draft roller 1 is 180 °. The arc end surface rotating vanes 3 of the drawing roller 1 equally divide the circumferential surface 2 of the drawing roller into 12 parts, and the distance between the arc end surfaces 4 of two adjacent arc end surface rotating vanes 3 is 2 (sin 15) times the radius of the drawing roller 1.
The material of the body of the rotary blade 3 with the arc end surface of the drafting roller 1 is stainless steel. Furthermore, the outer surface of the coating of the arc-shaped end surface rotating blade 3 is made of composite functional materials, such as quartz, rubber, alloy and the like, so as to regulate and control the friction performance between the tows 5 and the solid end surface or improve the corrosion resistance of the roller body.
The draft roller 1 described in the present embodiment can be used alone, in combination of a plurality of rollers, or in combination with other rollers.
The drawing roller 1 described in this embodiment can be used in wet and dry spinning processes of regenerated cellulose fibers, alginate fibers, chitosan fibers, and the like. The filament bundle 5 and a small amount of broken filaments, endless filaments, floating filaments and the like on the filament bundle can smoothly wind around the roller, the phenomena of roller sticking and roller winding are avoided, the spinning process is stable, the drafting multiplying power does not need to be folded or adjusted back due to broken filaments of broken filaments, and the overall mechanical property of the filament bundle 5 is obviously improved.
The drafting roller 1 described in this embodiment can be used for drafting of fine denier, ultra-fine denier, high performance fiber and other varieties, such as drafting process of fine denier yarn and ultra-fine denier yarn of regenerated cellulose fiber, nylon, polyester, polypropylene, polyethylene fiber and the like, and has significant advantages. The tow 5 and a small amount of broken filaments, endless filaments, floating filaments and the like on the tow can smoothly wind around the roller, the roller sticking and winding phenomena are avoided, the spinning process is stable, the drafting multiplying power can be maximized, the broken filaments of the broken filaments do not need to be broken or adjusted back, and the overall mechanical property of the tow 5 is obviously improved.
Example 2
As shown in fig. 10 and 11, the drafting roller 1 for spinning is formed by arranging arc end surface rotating blades 3 on the outer side of the circumferential surface of the roller, and the end surface radian, the end surface arc chord length, the rotating blade end spacing, the rotating blade number, the arrangement mode and the like of the arc end surface rotating blades 3 can be designed and customized according to the actual spinning requirement.
The drafting roller 1 for spinning provided in this embodiment is different from the above embodiments in that the arc center axis direction of the arc end face 4 and the roller axis 11 direction have a crossing angle α. Fig. 10 is a perspective view of the draft roller 1, and fig. 11 is a front view of the draft roller 1. In the case where the crossing angle α is not greater than 45 ° and the arc-shaped end surface rotating blades 3 are symmetrically or uniformly distributed around the roller shaft 11, as shown in fig. 11, the arc-shaped angle of the arc-shaped end surface 4 of the arc-shaped end surface rotating blade 3 of the drafting roller 1 is 180 °, the arc-shaped end surface rotating blade 3 of the drafting roller 1 divides the circumference of the roller into 12 parts in an oblique manner, and the distance between adjacent arc-shaped end surfaces 4 is 2 × 2 (sin15 °) on the plane where the circumference of the cross section of the drafting roller 1 is located, which is the radius of the drafting roller 1. The body of the rotary blade 3 with the arc end surface of the drafting roller 1 is made of ceramic. Furthermore, the outer surface of the coating of the arc-shaped end surface rotating blade 3 is made of composite functional materials, such as quartz, rubber, alloy and the like, so as to regulate and control the friction performance between the tows 5 and the solid end surface or improve the corrosion resistance of the roller body.
The draft roller 1 described in the present embodiment can be used alone, in combination of a plurality of rollers, or in combination with other rollers.
In summary, the drafting roller 1 of the embodiment of the present invention can greatly reduce the adhesion of the drafting roller 1 to the floating filaments, the monofilaments, or the broken filaments while realizing the drafting effect on the tows 5 by adjusting and controlling the number and the area of the contact points or lines between the tows 5 and the roller, and highlight the entrainment effect of the tows 5 themselves to the broken filaments, the floating filaments, and the broken filaments, thereby eliminating the adhesion phenomenon of the broken filaments to the roller. Can eliminate the phenomenon that the broken filaments are wound on the roller, improve the production stability and reduce the labor. The process draft multiplying factor can be improved as much as possible, so that the higher draft level which cannot be achieved due to a small amount of broken filaments is achieved, and the mechanical properties of the fibers and the tows 5 are obviously improved. Can be used for stable production of fine and ultra-fine denier fibers and tows 5, and makes it easy to further reduce the denier.
By adopting the drafting roller 1 provided by the embodiment of the invention, the problems of production stability and feasibility can be solved, the product performance can be effectively improved, the product types can be enriched, the product application field can be enlarged, and the requirements of quality improvement, consumption reduction, differentiation and high performance of the product at present can be met.
The drafting roller 1 described in this embodiment can be used in the wet spinning drafting process and the dry spinning drafting process of regenerated cellulose fibers, alginate fibers, chitosan fibers and the like, the tow 5 and a small amount of broken filaments, endless filaments, floating filaments and the like on the tow can smoothly pass around the roller, the roller sticking and winding phenomena are avoided, the spinning process is stable, the drafting multiplying power does not need to be broken or adjusted back due to broken filaments, and the overall mechanical property of the tow 5 is remarkably improved.
The drafting roller 1 described in this embodiment can be used for drafting of fine denier, ultra-fine denier, high performance fiber and other varieties, such as drafting process of fine denier yarn and ultra-fine denier yarn of regenerated cellulose fiber, nylon, polyester, polypropylene, polyethylene fiber and the like, and has significant advantages. The tow 5 and a small amount of broken filaments, endless filaments, floating filaments and the like on the tow can smoothly wind around the roller, the roller sticking and winding phenomena are avoided, the spinning process is stable, the drafting multiplying power can be maximized, the broken filaments of the broken filaments do not need to be broken or adjusted back, and the overall mechanical property of the tow 5 is obviously improved.
The above embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention in any way, and although the present invention has been disclosed by the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications to the equivalent embodiments by using the technical contents disclosed above without departing from the technical scope of the present invention, and the embodiments in the above embodiments can be further combined or replaced, but any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.
Claims (10)
1. A drafting roller for spinning is characterized by comprising a plurality of arc-shaped end surface rotating blades which are distributed at intervals along the circumferential direction of the drafting roller;
the arc end surfaces of the arc end surface rotating blades jointly form the outer side of the circumferential surface of the drawing roller.
2. The draft roller for spinning according to claim 1,
the drafting roller structural parameters comprise the end face radian of the arc-shaped end face rotating blades, the end face arc chord length, the length of the rotating blades, the distance between every two adjacent arc-shaped end face rotating blades, the number of the rotating blades and the diameter of the roller, and the drafting roller structural parameters correspond to the arrangement rules and the spinning requirements of the arc-shaped end face rotating blades.
3. The draft roller for spinning according to claim 2, wherein an end surface radian of said arc-shaped end surface rotating blade is not more than 300 °.
4. The draft roller for spinning according to claim 2, wherein a distance between two adjacent curved end surface rotating blades is not more than a radius of the draft roller.
5. The draft roller for spinning according to any one of claims 1 to 4, wherein the arc center axis direction of said arc end surface rotating blades is parallel to the roller axis, and said arc end surface rotating blades are symmetrically or uniformly distributed around the roller axis.
6. The drawing roll for spinning according to any one of claims 1 to 4, wherein the arc center axis direction of the arc end surface rotating blades and the roll axis direction of the drawing roll have a cross angle, the cross angle is less than or equal to 45 degrees, and the arc end surface rotating blades are symmetrically or uniformly distributed around the roll axis.
7. The draft roller for spinning according to any one of claims 1 to 4, wherein said curved end surface rotating blade comprises a body and a coating layer coated outside said body;
the body is made of metal, ceramic or composite material;
the coating is made of a composite functional material.
8. The drawing roll for spinning according to any one of claims 1 to 4,
the drafting roller for spinning is used for the wet spinning process or the dry spinning process of regenerated cellulose fibers, alginate fibers and chitosan fibers, or is used for the drafting process of fine denier yarns and ultra-fine denier yarns of regenerated cellulose fibers, chinlon, polyester yarns, polypropylene fibers and polyethylene fibers.
9. The draft roller for spinning according to any one of claims 1 to 4, wherein the draft roller for spinning is used alone, in combination of a plurality of the draft rollers, or in combination with other rollers.
10. A spinning pack comprising a drawing roller for spinning according to any one of claims 1 to 9.
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