Combing and drawing combination machine and process for ramie, short flax and wool fibers

Abstract

The invention relates to a combing and drawing combination machine and process for ramie, short flax and wool fibers. The combing and drawing combination machine comprises a plurality of wool type combing machines, a sliver guide table, a plurality of guide rollers and a drawing frame. The wool type combing machines are arranged side by side, and a plurality of grooves are formed in the surfaces of strip outlet roller pairs of the wool type combing machines; the sliver guide table is arranged in front of the wool type combing machines; the plurality of guide rollers correspond to the plurality of wool type combing machines and are rotationally mounted among the metal guide strip rollers; the drawing frame is arranged on one side of the sliver guide table and comprises a rear roller pair, a middle roller, a pressure roller and a front roller pair, the rear roller pair comprises a rear roller and a rear leather roller, a rear jaw is formed between the rear roller and the rear leather roller, the front roller pair comprises a front roller and a front leather roller, and a front jaw is formed between the front roller and the front leather roller; the combing slivers output by the multiple wool type combing machines are directly combined and drafted through the drawing frame to form the output slivers to be output, the number of follow-up drawing channels can be reduced, the technological process can be effectively shortened, and meanwhile the quality of the output slivers can be guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of textile machinery, and in particular relates to a combing and drawing machine and a process for ramie, flax and wool fibers. Background Art

[0002] Nowadays, the automation and continuity of spinning are widely concerned. In cotton spinning, the cleaning and combing, coarse and fine connection, fine winding and coarse and fine winding technologies have played a positive role in reducing labor and improving equipment production efficiency and product quality. In recent years, the combing parallel technology has also begun to attract people's attention. The combing of cotton spinning has long been combined with drawing. The cotton combing machine is actually a combination of 8 combing machines (combing units) and a drawing and drafting device. That is, there are 8 combing units on the cotton combing machine. The combed strips output by each unit are combined on the guide table and then drawn by the drawing machine before output. Therefore, in the cotton spinning system, cotton only needs one drawing after combing to enter the roving process.

[0003] The average fiber length of ramie, flax and wool fibers is about 70-120 mm. Combing and drawing need to be processed separately by wool-type combing machines and drawing (gill combing) machines, and each wool-type combing machine has only one combing unit and can only output one combed sliver. Therefore, after combing, 4-5 drawing processes are usually used for drawing and drafting, which has a long process flow and low production efficiency. At present, there is still a lack of a combing and drawing combined machine for ramie, flax and wool fibers. If the combed slivers output by multiple wool-type combing machines can be directly combined and drawn, the combing and drawing combined technology of ramie, flax and wool fibers can be realized, which can effectively shorten the process flow, improve production efficiency and reduce labor costs.

[0004] Ramie, flax and wool fibers are coarse and rigid, and the cohesion between fibers is poor, especially after combing, the fibers are straightened, causing the cohesion to further decrease. The combed slivers output by the wool combing machine are very easy to break. If multiple combing machines are directly combined with the drawing frame, during the transportation process, it is easy to have to stop the machine to connect the slivers because one of the combed slivers is broken, resulting in a decrease in the production efficiency of the entire machine. In addition, the drawing frame used for ramie, flax and wool fibers is usually a needle combing machine. The combing box mechanism of the needle combing machine is complex and large, and the vibration is also large. If it is directly combined with the combing machine, it is easy to cause large vibration of the machine, affecting the quality of the combed sliver, and then affecting the quality of the output sliver. In addition, the needle plate is easy to damage the fiber when piercing the fiber layer, causing the fiber to be entangled, further affecting the quality of the output sliver. Summary of the invention

[0005] The main purpose of the present invention is to propose a combing and drawing machine and process for ramie, flax and wool fibers, which can effectively solve the problems in the background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A combing and drawing machine for ramie, flax and wool fibers, comprising

[0008] A plurality of wool-type combing machines are arranged side by side, and the surfaces of the delivery roller pairs of the wool-type combing machines are provided with a plurality of grooves;

[0009] A sliver guide table, arranged in front of the plurality of wool-type combing machines, and composed of a plurality of rotating metal sliver guide rollers;

[0010] A plurality of guide rollers, corresponding to the plurality of wool-type combing machines, are installed between the metal guide rollers and are rotatable;

[0011] The drawing frame is arranged on one side of the guide frame, and includes a rear roller pair, a middle roller, a pressure roller and a front roller pair arranged in sequence along the drafting path. The rear roller pair includes a rear roller and a rear leather roller, and a rear nip is formed therebetween. The front roller pair includes a front roller and a front leather roller, and a front nip is formed therebetween. The middle roller and the pressure roller rotate the yarn by rotation, and make the yarn form a curved drafting path.

[0012] Preferably, the further away from the guide roller of the drawing frame, the farther away from the corresponding wool-type combing machine.

[0013] Preferably, the guide roller is a rotatable double-bearing roller.

[0014] A combing and drawing process for ramie, flax and wool fibers, using any of the above-mentioned combing and drawing machines, comprising the following steps:

[0015] S1: a plurality of the wool-type combing machines output combed slivers through a pair of sliver delivery rollers;

[0016] S2: a plurality of combed slivers are respectively combined on the sliver guide table after passing through corresponding guide rollers, and are fed into the drawing frame;

[0017] S3: In the drawing frame, the combed sliver is held by the rear jaw, and then, after being drawn in a curve by the middle roller and the pressure roller, it is held by the front jaw and output as an output sliver.

[0018] Preferably, the diameter of the strip-feeding roller is 50 mm, the groove angle of the groove is 45°, the depth is 3-5 mm, the pitch width is unequal, and the tooth top width is 2 mm.

[0019] Preferably, the interval between the metal guide rollers is 50-100 mm, and the drafting multiple between the metal guide rollers and the back roller is 0.98-1.03.

[0020] Preferably, the total drafting multiple of the drawing frame is 4-16 times, the drafting multiple of the middle roller and the rear roller is 1-1.6 times, the drafting multiple of the front roller and the middle roller is 4-10 times, the center distance between the rear roller and the front roller is 250-320 mm, the center distance between the rear roller and the middle roller is 100-150 mm, the center distance between the middle roller and the pressure roller is 50-100 mm, the upper surface of the middle roller is 10 mm higher than the upper surface of the rear roller, and the lower surface of the pressure roller is flush with the upper surface of the front roller.

[0021] Preferably, the fiber strips fed into the wool combing machine have a basis weight of 6-15g / m, 18-26 fiber strips are fed, the effective output length of the wool combing machine is 25-32mm, the feeding length is 5-12mm, and the output combed strips have a basis weight of 6-15g / m.

[0022] The present invention provides a combing and drawing machine and process for ramie, flax and wool fibers, which has the following beneficial effects:

[0023] 1. Firstly, the surfaces of the sliver delivery rollers of the present invention are provided with a plurality of grooves, through which the combed sliver can be wrinkled to form curls, thereby increasing the cohesion of the fibers in the combed sliver and reducing the breakage of the combed sliver; secondly, the guide roller can rotate flexibly, and it rotates along with the conveyance of the combed sliver, thereby effectively reducing the breakage of the combed sliver caused by friction between the combed sliver and the guide roller; finally, the present invention uses a plurality of rotating metal guide rollers as guide tables for actively conveying the combed sliver, and compared with the transmission belt, it can effectively avoid the deterioration of the dryness of the combed sliver and even the breakage of the combed sliver caused by friction static electricity.

[0024] 2. The drawing frame of the present invention performs curve drafting through the middle roller and the pressure roller, has a simple structure, can form an additional friction force boundary, effectively control the floating fibers, is beneficial to improve the uniformity of the strips, and will not cause damage to the fibers. It can also rotate smoothly, effectively eliminate the vibration of the machine, and ensure the quality of the output strips.

[0025] 3. The present invention directly combines and stretches the combed strips output by multiple wool-type combing machines through a drawing frame to form output strips for output, which can reduce the number of subsequent drawing passes, effectively shorten the process flow, improve production efficiency, reduce labor costs, and at the same time ensure the quality of the output strips. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a plan view of the combing and drawing machine of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the drawing frame of the present invention;

[0028] Figure 3 It is a schematic structural diagram of a single sliver delivery roller of the present invention.

[0029] In the figure: 1. wool-type combing machine; 11. pair of delivery rollers; 12. groove; 2. guide sliver table; 21. metal guide sliver roller; 3. guide roller; 4. drawing frame; 41. rear roller; 42. rear leather roller; 43. front roller; 44. front leather roller; 45. middle roller; 46. pressure roller; 5. combed sliver; 6. delivery sliver. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0031] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Reference Figure 1-3 , a combing and drawing machine for ramie, flax and wool fibers, comprising

[0035] A plurality of wool-type combing machines 1 are arranged side by side, and the surfaces of the delivery roller pairs 11 of the wool-type combing machines 1 are provided with a plurality of grooves 12;

[0036] The guide bar platform 2 is arranged below the plurality of wool type combing machines 1 and is composed of a plurality of rotating metal guide bar rollers 21;

[0037] A plurality of guide rollers 3, corresponding to the plurality of wool-type combing machines 1, are installed between the metal guide rollers 21 and are rotatable;

[0038] The drawing frame 4 is arranged on one side of the guide table 2, and the drawing frame 4 includes a rear roller pair, a middle roller 45, a pressure roller 46 and a front roller pair arranged in sequence along the drafting path. The rear roller pair includes a rear roller 41 and a rear leather roller 42, and a rear nip is formed therebetween. The front roller pair includes a front roller 43 and a front leather roller 44, and a front nip is formed therebetween. The middle roller and the pressure roller rotate the yarn by rotation, and make the yarn form a curved drafting path to strengthen the control of the fiber movement during drafting and improve the unevenness of the yarn after drafting.

[0039] In a specific embodiment, the farther away from the guide roller 3 of the drawing frame 4, the farther it is from the corresponding wool-type combing machine 1, ensuring that the conveying paths of several combed strips 5 do not interfere with each other, so that they can be combined on the guide table 2.

[0040] In a specific embodiment, the guide roller 3 is a rotatable double-bearing roller.

[0041] The present invention also provides a combing and drawing process for ramie, flax and wool fibers, using the above-mentioned combing and drawing machine, comprising the following steps:

[0042] S1: The wool-type combing machines 1 output combed slivers 5 through the sliver delivery roller pair 11;

[0043] S2: a plurality of combed slivers 5 are respectively combined on the sliver guide table 2 after passing through corresponding guide rollers 3, and are fed into the drawing frame 4;

[0044] S3: In the drawing frame 4, the combed strip 5 is held by the rear jaw, and then, after being drawn in a curve by the middle roller 45 and the pressure roller 46, it is held by the front jaw and formed into an output strip 6 for output.

[0045] In a specific embodiment, the diameter of the strip roller is 50 mm, the groove angle of the groove 12 is 45°, the depth is 3-5 mm, the pitch is of unequal width, and the tooth top width is 2 mm.

[0046] In a specific embodiment, the spacing of the metal guide rollers 21 is 50-100 mm, which is smaller than the average length of the fiber to prevent the fiber strips from falling and causing breakage. The stretching multiple between the metal guide rollers 21 and the rear roller 41 is 0.98-1.03 to avoid accidental stretching.

[0047] In a specific embodiment, the total drafting multiple of the drawing frame 4 is 4-16 times, the drafting multiple of the middle roller 45 and the rear roller 41 is 1-1.6 times, the drafting multiple of the front roller 43 and the middle roller 45 is 4-10 times, the center distance between the rear roller 41 and the front roller 43 is 250-320 mm, the center distance between the rear roller 41 and the middle roller 45 is 100-150 mm, the center distance between the middle roller 45 and the pressure roller 46 is 50-100 mm, the upper surface of the middle roller 45 is 10 mm higher than the upper surface of the rear roller 41, and the lower surface of the pressure roller 46 is flush with the upper surface of the front roller 43.

[0048] In a specific embodiment, the fiber strips fed into the wool-type combing machine 1 have a basis weight of 6-15 g / m, 18-26 fiber strips are fed, the effective output length of the wool-type combing machine 1 is 25-32 mm, the feeding length is 5-12 mm, and the output combed strips 5 have a basis weight of 6-15 g / m.

[0049] On the one hand, ramie, flax and wool fibers are coarse and rigid, and the cohesion between the fibers is poor, especially after combing, the fibers are combed straight, resulting in a further reduction in the cohesion. The combed strips 5 output by the wool-type combing machine 1 are very easy to break. In order to solve the problem of easy breakage of the combed strips 5, the present invention is designed as follows: First, the surface of the strip output roller pair 11 of the present invention is provided with a plurality of grooves 12, and the grooves 12 can wrinkle the combed strips 5 to form curls, thereby increasing the cohesion of the fibers in the combed strips 5, thereby reducing the breakage of the combed strips 5; secondly, the guide roller 3 can rotate flexibly, and it rotates with the transportation of the combed strips 5, which can effectively reduce the breakage caused by friction between the combed strips 5 and the guide roller 3; finally, the present invention uses a plurality of rotating metal guide rollers 21 as a guide table 2 for actively conveying the combed strips 5. Compared with the transmission belt, it can effectively avoid the deterioration of the combed strips 5 and even the breakage of the combed strips 5 caused by friction static electricity.

[0050] On the other hand, the drawing frame 4 used for ramie, flax and wool fibers is usually a needle combing machine. The combing box mechanism of the needle combing machine is complex and large, and the vibration is also large. If it is directly combined with a combing machine, it is easy to cause large vibrations of the machine, affecting the quality of the combed strip 5, and then affecting the quality of the output strip 6. In addition, the needle plate is easy to damage the fibers when piercing the fiber layer, causing fiber entanglement, further affecting the quality of the output strip 6. In order to solve the quality problem of the output strip 6, the drawing frame 4 of the present invention performs curved stretching through the middle roller 45 and the pressure roller 46. It has a simple structure and can form an additional friction force boundary to effectively control the floating fibers, which is beneficial to improving the uniformity of the strip. It will not cause damage to the fibers and can rotate smoothly, effectively eliminating the vibration of the machine and ensuring the quality of the output strip 6.

[0051] The present invention provides a combing and drawing machine for ramie, flax and wool fibers, which directly combines and stretches the combed strips 5 output by multiple wool-type combing machines 1 through a drawing frame 4 to form output strips 6 for output, thereby reducing the number of subsequent drawing passes, effectively shortening the process flow, improving production efficiency, reducing labor costs, and at the same time ensuring the quality of the output strips 6.

[0052] Example 1

[0053] A combing and drawing machine for ramie, flax and wool fibers, wherein eight wool-type combing machines 1 are connected to one drawing frame 4 to form a combing and drawing machine for spinning ramie strips. The average length of ramie fiber is 100 mm. The flax strips fed into the wool-type combing machine are 8 g / m in weight, and 22 flax strips are fed. The effective output length of the wool-type combing machine is 30 mm, the feeding length is 8 mm, and the combed strips 5 output by each wool-type combing machine are 10 g / m in weight. The groove angle of the strip delivery roller is 45°, the groove 12 is 4 mm deep, the pitch is unequal in width, the tooth top width is 2 mm, and the roller diameter is 50 mm. The interval between adjacent metal guide rollers 21 is 80 mm, and the drafting multiple between the metal guide roller 21 and the rear roller 41 of the drawing frame 4 is 1.02. The drafting parameters of the drawing frame 4 are as follows: the total drafting multiple is 8.0 times, the drafting multiple of the middle roller 45 and the back roller 41 is 1.2 times; the drafting multiple of the front roller 43 and the middle roller 45 is 6.7 times; the center distance between the back roller 41 and the front roller 43 is 275mm, the center distance between the back roller 41 and the middle roller 45 is 120mm, and the center distance between the middle roller 45 and the pressure roller 46 is 80mm. The upper surface of the middle roller 45 is 10mm higher than the upper surface of the back roller 41, and the lower surface of the pressure roller 46 is flush with the upper surface of the front roller 43. The final output ramie strips of the combing and drawing machine are 10g / m3 in weight and 3.15% in unevenness.

[0054] Comparative Example 1

[0055] Ramie combed strips 5 are spun on a conventional wool-type combing machine, and then a drawing (needle combing) is performed. The average length of ramie fiber is 100 mm. The ramie strips fed into the combing machine have a basis weight of 8 g / m, and 22 ramie strips are used for feeding. The effective output length of the wool-type combing machine is 30 mm, and the feeding length is 8 mm. The basis weight of the combed strips 5 output by each wool-type combing machine is 10 g / m. Eight combed strips 5 are randomly combined and fed into the needle combing machine for drafting. After drawing, the ramie strips output have a basis weight of 10 g / m, and the unevenness of the strips is 3.78%. Compared with Example 1, the unevenness of the strips output is poor. It can be seen that the combing and drawing combined machine of the present invention can achieve better quality output strips while reducing one drawing process.

[0056] Example 2

[0057] A combing and drawing machine for wool fibers such as ramie and flax, wherein four wool-type combing machines 1 are connected to one drawing frame 4 to form a combing and drawing machine for spinning flax slivers. The average length of flax slivers is 80 mm. The slivers fed into the wool-type combing machine are quantitatively 15 g / m, and 18 slivers are used for feeding. The effective output length of the wool-type combing machine is 25 mm, the feeding length is 5 mm, and the combed sliver 5 output by each wool-type combing machine is quantitatively 15 g / m. The groove angle of the sliver output roller is 45°, the groove 12 is 5 mm deep, the pitch is unequal width, the tooth top width is 2 mm, and the roller diameter is 50 mm. The interval between adjacent metal guide rollers 21 is 50 mm, and the drafting multiple between the metal guide roller 21 and the rear roller 41 of the drawing frame 4 is 0.98. The drafting parameters of the drawing frame 4 are as follows: the total drafting multiple is 4.0 times, the drafting multiple of the middle roller 45 and the back roller 41 is 1.0 times; the drafting multiple of the front roller 43 and the middle roller 45 is 4.0 times; the center distance between the back roller 41 and the front roller 43 is 250mm, the center distance between the back roller 41 and the middle roller 45 is 100mm, and the center distance between the middle roller 45 and the pressure roller 46 is 50mm. The upper surface of the middle roller 45 is 10mm higher than the upper surface of the back roller 41, and the lower surface of the pressure roller 46 is flush with the upper surface of the front roller 43. The final output of the combing and drawing machine has a flax short flax strip with a basis weight of 15g / m, a strip unevenness rate of 3.1%, and a high quality of the output strip.

[0058] Example 3

[0059] A combing and drawing machine for wool fibers such as ramie and flax, wherein 12 wool-type combing machines 1 are connected to a drawing frame 4 to form a combing and drawing machine for spinning ramie strips. The average length of ramie fiber is 120 mm. The flax strips fed into the wool-type combing machine are 6 g / m in weight, and 26 flax strips are fed. The effective output length of the wool-type combing machine is 32 mm, the feeding length is 12 mm, and the combed strips 5 output by each wool-type combing machine are 6 g / m in weight. The groove angle of the strip output roller is 45°, the groove 12 is 3 mm deep, the pitch is unequal in width, the tooth top width is 2 mm, and the roller diameter is 50 mm. The interval between adjacent metal guide rollers 21 is 100 mm, and the drafting multiple between the metal guide roller 21 and the rear roller 41 of the drawing frame 4 is 1.03. The drafting parameters of the drawing frame 4 are as follows: the total drafting multiple is 12.0 times, the drafting multiple of the middle roller 45 and the back roller 41 is 1.3 times; the drafting multiple of the front roller 43 and the middle roller 45 is 7.5 times; the center distance between the back roller 41 and the front roller 43 is 320mm, the center distance between the back roller 41 and the middle roller 45 is 150mm, and the center distance between the middle roller 45 and the pressure roller 46 is 100mm. The upper surface of the middle roller 45 is 10mm higher than the upper surface of the back roller 41, and the lower surface of the pressure roller 46 is flush with the upper surface of the front roller 43. The final output ramie strips of the combing and drawing machine are 6g / m, the unevenness of the strips is 3.53%, and the output strips are of high quality.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A combing and drawing machine for ramie, flax and wool fibers, characterized in that: It comprises a plurality of wool-type combing machines arranged side by side, and the surfaces of the delivery rollers of the wool-type combing machines are each provided with a plurality of grooves; A sliver guide table, arranged in front of the plurality of wool-type combing machines, and composed of a plurality of rotating metal sliver guide rollers; A plurality of guide rollers, corresponding to the plurality of wool-type combing machines, are installed between the metal guide rollers and are rotatable; a drawing frame is arranged on one side of the guide frame platform, and the drawing frame includes a rear roller pair, a middle roller, a pressure roller and a front roller pair arranged in sequence along the drafting path, the rear roller pair includes a rear roller and a rear leather roller, and a rear nip is formed therebetween, the front roller pair includes a front roller and a front leather roller, and a front nip is formed therebetween, the middle roller and the pressure roller rotate the yarn by rotation, and make the yarn form a curved drafting path.

2. A combing and drawing machine for ramie, flax and wool fibers according to claim 1, characterized in that: The further away from the guide rollers of the draw frame, the greater the distance from the corresponding wool-type combing machine.

3. A combing and drawing machine for ramie, flax and wool fibers according to claim 1, characterized in that: The guide roller is a rotatable double-bearing roller.

4. A combing and drawing process for ramie, flax and wool fibers, using the combing and drawing machine according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1: a plurality of the wool-type combing machines output combed slivers through a pair of sliver delivery rollers; S2: a plurality of combed slivers are respectively combined on the sliver guide table after passing through corresponding guide rollers, and are fed into the drawing frame; S3: In the drawing frame, the combed sliver is held by the rear jaw, and then, after being drawn in a curve by the middle roller and the pressure roller, it is held by the front jaw and output as an output sliver.

5. A combing and drawing process for ramie, flax and wool fibers according to claim 4, characterized in that: The diameter of the strip-feeding roller is 50 mm, the groove angle of the groove is 45°, the depth is 3-5 mm, the pitch is of unequal width, and the tooth top width is 2 mm.

6. A combing and drawing process for ramie, flax and wool fibers according to claim 4, characterized in that: The interval between the metal guide rollers is 50-100 mm, and the drafting multiple between the metal guide rollers and the back roller is 0.98-1.

03.

7. A combing and drawing process for ramie, flax and wool fibers according to claim 4, characterized in that: The total drafting multiple of the drawing frame is 4-16 times, the drafting multiple of the middle roller and the rear roller is 1-1.6 times, the drafting multiple of the front roller and the middle roller is 4-10 times, the center distance between the rear roller and the front roller is 250-320 mm, the center distance between the rear roller and the middle roller is 100-150 mm, the center distance between the middle roller and the pressure roller is 50-100 mm, the upper surface of the middle roller is 10 mm higher than the upper surface of the rear roller, and the lower surface of the pressure roller is flush with the upper surface of the front roller.

8. A combing and drawing process for ramie, flax and wool fibers according to claim 4, characterized in that: The fiber strips fed into the wool-type combing machine have a basis weight of 6-15g / m, and 18-26 fiber strips are fed. The effective output length of the wool-type combing machine is 25-32mm, the feeding length is 5-12mm, and the output combed strips have a basis weight of 6-15g / m.

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