阅读说明：本技术 一种利用棉纺设备生产苎麻纱的方法及苎麻预处理设备 (Method for producing ramie yarn by using cotton spinning equipment and ramie pretreatment equipment ) 是由 李光凡 李仁充 李海燕 丁学兵 刘宏明 王金波 冯德红 于 2019-01-16 设计创作，主要内容包括：本发明提供了一种利用棉纺设备生产苎麻纱的方法及苎麻预处理设备,属于纺织技术领域。本方法包括如下步骤：在束状精干麻中添加占精干麻重量1～5％的乳化油、0.3～2％工业酒精,并密封养生8～24小时；梳麻分丝后进行预切断,麻纤维长度在80mm以内,对苎麻纤维进行在切断,使纤维长度在16～40mm之间,预切断过程中进行麻结的滤除；清洗苎麻纤维中的乳化油,然后对切断后的苎麻纤维进行抓泡；对苎麻纤维在棉纺设备上进行纺织加工,通过对应的预处理设备,实现苎麻的匀化分丝和切断,使其更加符合棉纺设备的要求,本发明具有能够高效的利用棉纺设备加工苎麻等优点。(The invention provides a method for producing ramie yarn by using cotton spinning equipment and ramie pretreatment equipment, belonging to the technical field of spinning. The method comprises the following steps: adding emulsified oil accounting for 1-5% of the weight of the degummed ramie and industrial alcohol accounting for 0.3-2% of the weight of the degummed ramie into the bunched degummed ramie, and sealing and preserving for 8-24 hours; pre-cutting ramie fibers after combing and splitting, wherein the length of the ramie fibers is within 80mm, the ramie fibers are cut, the length of the ramie fibers is 16-40 mm, and neps are filtered in the pre-cutting process; cleaning emulsified oil in the ramie fibers, and then carrying out foam grabbing on the cut ramie fibers; the method has the advantages that the ramie can be efficiently processed by utilizing the cotton spinning equipment, and the like.)

1. A method for producing ramie yarn by using cotton spinning equipment is characterized by comprising the following steps:

1) adding emulsified oil accounting for 1-5% of the weight of the degummed ramie and industrial alcohol accounting for 0.3-2% of the weight of the degummed ramie into the bunched degummed ramie, and sealing and preserving for 8-24 hours;

2) pre-cutting ramie fibers after combing and splitting, wherein the length of the ramie fibers is within 80mm, the ramie fibers are cut, the length of the ramie fibers is 16-40 mm, and neps are filtered in the pre-cutting process;

3) cleaning emulsified oil in the ramie fibers, and then carrying out foam grabbing on the cut ramie fibers;

4) and spinning the ramie fibers obtained in the step 3) on cotton spinning equipment.

2. In ramie pretreatment equipment, the ramie pretreatment equipment is characterized by comprising a frame (1), two ramie combing mechanisms which are symmetrically distributed on the frame (1) and comprise guide covers (2), the guide cover (2) is cylindrical with a gap, a combing roller (3) is connected in the guide cover (2) in a uniform-speed rotating way, a gap is arranged between the guide hood (2) and the ramie combing roller (3), the ramie combing mechanism also comprises a feeding device which can intermittently feed ramie bundles into the gap between the guide hood (2) and the ramie combing roller (3), the inner wall of the guide cover (2) is provided with a convex pillow (21), the surface of the carding roller (3) is provided with a plurality of groups of comb teeth (31) and a strip-shaped first cutter (32), each group of comb teeth (31) comprises a plurality of comb strips, and comb grooves are formed between adjacent comb strips; the width of the comb groove is gradually increased in the rotating direction of the ramie roller (3);

be provided with in frame (1) and be located the ramie cutting mechanism of ramie carding mechanism below, cut ramie mechanism and cut roller two (5) including rotating a plurality of connection in frame (1) and cut roller (4) and a plurality of, cut roller (4) and cut roller two (5) alternate distribution, and cut roller (4) and cut roller two (5) rotational speed the same, cut on the global of roller (4) and cut and set up a plurality of second cutters (41) and a plurality of third cutter (51) on the global of roller two (5) respectively.

3. The ramie pretreatment device according to claim 2, characterized in that the axes of the first shearing roller (4) and the second shearing roller (5) are perpendicular to the axis of the hackling roller (3).

4. The ramie pretreatment device according to claim 2 or 3, wherein the feeding device comprises a feeding roller (61), a first clamping roller (62) and a second clamping roller (63), a rotating shaft (64) is fixed at the eccentric position of the first clamping roller (62) and the second clamping roller (63), the rotating shaft (64) is rotatably connected to the frame (1), the axes of the first clamping roller (62) and the second clamping roller (63) are respectively hinged with a clamping arm (65), one end of each clamping arm (65) is hinged with each other through a pin shaft, the other end of each clamping arm (65) is hinged with two rotating shafts (64), the feeding mechanism further comprises an air cylinder (66), the body of the air cylinder (66) is fixed on the frame (1), two pressing plates (67) which are parallel to each other are fixedly arranged on the push rod of the air cylinder (66), the two clamping arms (65) are respectively abutted against the inner side surfaces of the two pressing plates (67), the pin shaft is connected between the two pressing plates (67) in a sliding mode, and a return spring (68) in a compression state is connected between the two clamping arms (65).

5. A ramie pretreatment device according to claim 4, characterized in that a receiving hopper (7) is arranged below the first (4) or second (5) shear roll in the end position.

6. The ramie pretreatment device according to claim 4, wherein a belt wheel (81) is fixed on each of the first shearing roller (4) and the second shearing roller (5), the frame (1) is provided with a driving motor (82), and a belt (83) is arranged between an output shaft of the driving motor (82) and each belt wheel (81).

7. The ramie pretreatment device according to claim 4, wherein the convex pillows (21) are connected by a plurality of pull rods, the pull rods are slidably connected to the guide cover (2), and a compression spring (22) is connected between the pull rods and the outer wall of the guide cover (2).

Technical Field

The invention belongs to the technical field of spinning, and relates to a method for producing ramie yarns by using cotton spinning equipment and ramie pretreatment equipment.

Background

The ramie is a special product in China, the ramie spinning equipment at home and abroad falls behind, but the cotton spinning equipment is relatively advanced, the length of cotton spinning fibers is generally 16-38 mm, and the existing ramie spinning process comprises the following steps: the ramie softener-the steel wire machine-the pre-drawing frame-the combing machine-the gilling machine-the combing drawing frame-the roving frame-the fine sand machine has complex process, low efficiency and poor relative quality of ramie spinning products, and the reason is that ramie yarns have uneven and large evenness, different lengths and large length difference, and the flexibility of fibers, the elasticity of finished products, the softness and the like are difficult to guarantee.

The essence of the spinning process is to straighten and arrange the fibers in parallel and then twist them into yarn. The longer the fiber is, the more difficult the fiber is to be straightened and arranged in parallel, and the longer the fiber is, the larger the difference of the fiber length is, the greater the difficulty of spinning is, and the worse the quality of resultant yarn is, so that from the current spinning system, the short-length cotton fiber (about 30 mm) has the shortest spinning flow, the fastest the machine speed of each process is, and the highest overall technical level is; and the longer fibers (the length is generally 70-110 mm) such as hemp, wool, silk and the like have longer spinning flow and much slower production speed than cotton spinning. Although from the perspective of yarn formation, the longer the fiber, the stronger the yarn formation can be, in practice, through theoretical research and numerous spinning experiments in our earlier stage, it is confirmed that the increase in fiber length has a very limited contribution to the strength after the fiber length reaches a certain degree, and the fiber with shorter length has significantly improved properties such as uniformity after yarn formation. Generally, the average strength of the current yarn is basically satisfactory, and the user is more concerned about the uneven strength of the yarn. Therefore, the length of the ramie fiber can be shortened completely through treatment, the ramie fiber can meet the requirements of cotton spinning, then the ramie fiber is spun on cotton spinning equipment, and the development of the ramie spinning is promoted by utilizing an advanced cotton spinning platform.

In the patent "a ramie cotton type spinning processing method and the stretch breaking equipment used by the method" (publication number: CN102181972A), a new ramie spinning method is proposed, namely, the stretch breaking ramie cotton type spinning method, the processing flow is as follows: degummed ramie → soft ramie → predawn → predrawn → sliver → lap → combing → drawing (2-3 lanes) → roving → spun yarn. According to the technology, a large jaw holding force is formed by adopting a hydraulic or pneumatic pressurizing mode through a stretch breaking device, long fibers in ramie are broken to be 30-50 mm in length through the speed difference of a front roller and a rear roller, then spinning processing is carried out on cotton spinning equipment, the universality and interchangeability of the ramie spinning device and the cotton spinning device are improved, and the development of ramie spinning is promoted by utilizing an advanced cotton spinning platform to a certain extent. However, because ramie fibers are thick, hard and high in strength, the load of stretch breaking equipment is large, the energy consumption is high, the stretch breaking efficiency is low, and because the degummed ramie has a large number of fiber clusters and fiber knots due to bending and entanglement of the fibers, the fiber clusters and the fiber knots cannot be separated and loosened through stretch breaking, and in addition, a certain proportion of overlong fibers which cannot be broken exist in the stretch-broken ramie fibers, the phenomenon causes that the ramie fibers are very difficult to process in a cotton spinning drawing frame, a roving frame and a spinning frame, the phenomenon that the drafting cannot be broken easily occurs, and the final yarn quality is seriously influenced.

In order to solve the problem, some scholars also provide a method for stretch breaking by adopting ramie combed strips (Zhonghai cotton type ramie stretch breaking spinning process research [ D ]. Shanghai: Donghua university, 2013.), and the method utilizes the existing ramie pre-spinning equipment to process the ramie to form the combed strips and then stretch breaking, thereby avoiding the phenomena of fiber groups and fiber knots in stretch breaking of the refined ramie, greatly improving the spinnability of subsequent working procedures such as drawing, roving and spinning, and the like, and improving the quality of finished yarns. However, when the combed sliver is stretch-cut, because the ramie fibers are thick, hard and high in strength, the load of stretch-cut equipment is large, the energy consumption is high, the stretch-cut efficiency is low, the yield is low, and a certain proportion of ultra-long fibers which cannot be stretch-cut exist in the stretch-cut ramie fibers, so that the subsequent spinning process, especially the roving process and the spinning process are difficult to draft, and even if the slipperiness drafting is adopted, the phenomenon of non-opening drafting sometimes occurs, so that the yarn forming process and the yarn forming quality are not satisfactory. The method has the advantages of long process flow, more labor, high energy consumption, low production efficiency and low utilization rate of raw materials.

Before stretch-breaking spinning, the spinning processing of ramie on cotton spinning equipment mainly aims at the blending of combed noil, cotton and cotton type fibers in the spinning of long ramie, and the process comprises the following steps: ramie combing noil → Kaiki → combing → drawing (2 lanes) → roving → spun yarn. However, the raw material of the process is the noil generated in the combing procedure in the ramie long ramie spinning process, and the noil, hard strips and impurities are more, the short fiber content is high, and the resultant yarn quality is not high. Therefore, in some factories, in order to improve the quality of finished yarn, degummed ramie is used for softening the ramie, then the fiber is directly cut, and then the spinning is carried out on cotton spinning equipment, and the process comprises the following steps: the method comprises the steps of ramie refined dry ramie → soft ramie → cut ramie → Kaiqing → carding → drawing (2 channel) → roving → spun yarn, but because the refined dry ramie has more fiber groups and fiber knots due to bending and entanglement of the fibers, a large amount of ultra-long fibers, ramie particles and hard slivers inevitably exist after cutting, fine processing such as combing cannot be carried out on cotton spinning equipment, subsequent spinning cannot be carried out, particularly, the roving and spun yarn process is difficult to draft due to the existence of long fibers, and only smooth drafting can be adopted, so that the method can only be used for processing rough-count and low-grade blended yarns of ramie.

Disclosure of Invention

The first objective of the present invention is to provide a method for producing ramie yarn by using cotton spinning equipment, which aims to solve the technical problem of how to improve the carding and cutting effects of ramie fibers, so that the ramie fibers can better meet the requirements of the cotton spinning equipment when being processed on the cotton spinning equipment.

The purpose of the invention can be realized by the following technical scheme: a method for producing ramie yarn by using cotton spinning equipment is characterized by comprising the following steps:

1. adding emulsified oil accounting for 1-5% of the weight of the degummed ramie and industrial alcohol accounting for 0.3-2% of the weight of the degummed ramie into the bunched degummed ramie, and sealing and preserving for 8-24 hours;

2. pre-cutting ramie fibers after combing and splitting, wherein the length of the ramie fibers is within 80mm, the ramie fibers are cut, the length of the ramie fibers is 16-40 mm, and neps are filtered in the pre-cutting process;

3. cleaning emulsified oil in the ramie fibers, and then carrying out foam grabbing on the cut ramie fibers;

4. and (4) carrying out textile processing on the ramie fibers obtained in the step (3) on cotton spinning equipment.

Specifically, the ramie fibers obtained in the step 3 sequentially pass through a plucker, an automatic cotton feeder, an A034 six-roller opener, a porcupine opener, a carding machine, a drawing frame, a lap winder, a combing machine, an RSB-D40 type drawing frame, a JWF1415 type roving frame, an F1520 type spinning frame and a No.21C bobbin winder. When the drawing frame carries out drawing, the drawing fibre number is 2 ~ 3, and is generally 6 ~ 8 during the cotton fiber drawing, reduces drawing quantity, when dealing with the fibrilia thick, also avoids the fibrilia inequality to lead to follow-up cotton spinning processing equipment can not normally process.

The second object of the present invention is to solve the above problems and to provide a ramie pretreatment apparatus, which is aimed at homogenizing the length of ramie fibers to make them suitable for processing in cotton spinning equipment.

The ramie pretreatment equipment is characterized by comprising a rack, wherein two ramie combing mechanisms are symmetrically distributed on the rack, each ramie combing mechanism comprises a guide cover, the guide cover is cylindrical and provided with a notch, a ramie combing roller is rotatably connected in the guide cover at a constant speed, a gap is formed between the guide cover and the ramie combing roller, the ramie combing mechanism also comprises a feeding device capable of intermittently feeding ramie bundles into the gap between the guide cover and the ramie combing roller, a convex pillow is arranged on the inner wall of the guide cover, a plurality of groups of comb teeth and a strip-shaped first cutter are arranged on the surface of the ramie combing roller, each group of comb teeth comprises a plurality of comb strips, and comb grooves are formed between adjacent comb strips; the width of the combing groove is gradually increased in the rotating direction of the combing roller;

be provided with in the frame and be located the ramie cutting mechanism of ramie carding mechanism below, cut ramie mechanism and cut roller two including rotating a plurality of connection in the frame and cut roller one and a plurality of, cut roller one and cut roller two and distribute between each other, and cut roller one and cut roller two rotational speeds the same, it sets up a plurality of second cutters and a plurality of third cutter respectively on the global of roller one and on the global of cutting roller two.

The feeding device stops feeding after feeding ramie bundles with a certain length into a gap between the guide cover and the ramie carding roller, the ramie bundles continuously rotate at a constant speed, the ramie bundles positioned between the guide cover and the ramie carding roller are divided, combed and straightened, after each group of comb teeth comb the ramie, the convex pillow corresponds to the first cutter to cut off the combed and divided ramie, the cut ramie enters the ramie cutting mechanism under the rotation of the ramie carding roller, and before entering the ramie cutting mechanism, the ramie continuously scrapes, straightens and divides, especially a horn-shaped comb groove and a plurality of groups of comb teeth, so that the ramie bundles can be continuously dispersed and softened, the fiber is refined, and meanwhile, the fiber is curled, so that the fiber is more similar to cotton fiber.

In the process, the ramie bundle is cut into fiber sections of about 300mm, and the fiber sections enter a ramie cutting mechanism and are cut for the second time to form fibers of about 30 mm.

In the above ramie pretreatment apparatus, the axes of the first shearing roller and the second shearing roller are perpendicular to the axis of the hackling roller.

The fibers falling out of the notch are perpendicular to the first shearing roller and the second shearing roller when falling into the first shearing roller and the second shearing roller, so that most of the fibers can be cut off by the second cutter and the third cutter on the first shearing roller and the second shearing roller at the first time.

In foretell ramie pre treatment facility, material feeding unit includes blowing roller, first grip roller and second grip roller, the eccentric position department of first grip roller and second grip roller is fixed with the pivot, the pivot is rotated and is connected in the frame, the axis punishment of first grip roller and second grip roller do not articulates there is a arm lock, and the one end of two arm locks is articulated each other through a round pin axle, and the other end of two arm locks articulates two pivot respectively, and this feeding mechanism still includes a cylinder, the cylinder body of cylinder is fixed in the frame, the fixed clamp plate that is provided with two mutual parallels that is provided with on the push rod of cylinder, and two arm locks lean on respectively on the medial surface of two clamp plates, round pin axle sliding connection is between two clamp plates, is connected with a reset spring under compression state between two arm locks.

When the cylinder retracts, the reset spring bounces off the two clamping arms, so that the positions of the protruding points, far away from the axis of the rotating shaft, of the first clamping roller and the second clamping roller are mutually pressed, the fiber bundle is clamped, the fiber bundle cannot enter the guide cover, otherwise, under the restoring force of the reset spring, the positions, entering the axis of the rotating shaft, of the first clamping roller and the second clamping roller are right opposite, a gap allowing the fiber bundle to pass through is reserved between the first clamping roller and the second clamping roller, and under the rotating action of the ramie carding roller, the ramie fiber bundle can be fed.

In the above ramie pretreatment apparatus, a receiving hopper is disposed below the first shearing roller or the second shearing roller located at the end position.

Each shearing roller I and the shearing roller II form a cutting platform which is positioned below the ramie carding mechanism and can cut ramie fibers for multiple times, the ramie fibers which cannot be filtered through the gap between the shearing roller I and the shearing roller II can be carried to the meshing position of the next shearing roller I and the shearing roller II until the last shearing roller I or the shearing roller II, the ramie fibers at the position cannot be continuously cut and fall into the receiving hopper, most of the ramie fibers entering the receiving hopper are fibers with neps, and the ramie fibers cannot be filtered through the gap between the adjacent shearing roller I and the shearing roller II.

In the above ramie pretreatment apparatus, the first shearing roller and the second shearing roller are both fixed with a belt wheel, the frame is provided with a driving motor, and a belt is arranged between an output shaft of the driving motor and each belt wheel.

In the ramie pretreatment device, the convex pillows are connected through a plurality of pull rods, the pull rods are connected to the guide cover in a sliding mode, and a compression spring is connected between each pull rod and the outer wall of the guide cover.

The compression spring ensures that the first cutter and the convex pillow have good shearing strength, so that the ramie fibers are crisp in the shearing process, and the fibers are prevented from being pulled and disordered due to incomplete shearing.

As another possibility, material feeding unit includes blowing roller, first grip roller and second grip roller, the eccentric position department of first grip roller and second grip roller is fixed with the pivot, the pivot is rotated and is connected in the frame, the axis punishment of first grip roller and second grip roller do not articulates there is a arm lock, and the one end of two arm locks is articulated each other through a round pin axle, and the other end of two arm locks articulates two pivots respectively, and this feeding mechanism still includes a solenoid valve of fixing in the frame, still sliding connection has a support in the frame, two clamp plates that are parallel to each other have on the support, and two arm locks lean on respectively on the medial surface of two clamp plates, round pin axle sliding connection is between two clamp plates, is connected with a reset spring under compression state between two arm locks.

The scheme replaces the air cylinder in the previous scheme with an electromagnetic valve, the effect is similar, and besides the two schemes, the feeding mechanism can also be other mechanisms for controlling the intermittent rotation of the discharging roller.

Drawings

FIG. 1 is a schematic view of the constitution of the present pretreatment apparatus.

FIG. 2 is a sectional view of the pretreatment apparatus.

FIG. 3 is a development view of the peripheral surface of the card edge roll.

Fig. 4 is a schematic structural view of the feeding mechanism in a state of clamping the ramie bundle.

Fig. 5 is a schematic structural view of the feeding mechanism when the feeding mechanism is disengaged from clamping the ramie bundle.

In the figure, 1, a frame; 2. a guide housing; 21. a convex pillow; 22. a compression spring; 3. carding rollers; 31. comb teeth; 32. a first cutter; 4. a first shearing roller; 41. a second cutter; 5. a second shearing roller; 51. a third cutter; 61. a discharge roller; 62. a first nip roller; 63. a second nip roller; 64. a rotating shaft; 65. clamping arms; 66. a cylinder; 67. pressing a plate; 68. a return spring; 7. a receiving hopper; 81. a pulley; 82. a drive motor; 83. a belt.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

A method of producing ramie yarn using cotton spinning equipment, comprising the steps of:

1, adding emulsified oil accounting for 1-5% of the weight of the degummed ramie and 0.3-2% of industrial alcohol into the bunched degummed ramie, and sealing and preserving for 8-24 hours;

2, pre-cutting ramie fibers after combing and splitting, wherein the length of the ramie fibers is within 80mm, the ramie fibers are cut off, the length of the ramie fibers is 16-40 mm, and neps are filtered in the pre-cutting process;

3, cleaning the emulsified oil in the ramie fibers, and then carrying out foam grabbing on the cut ramie fibers;

4, spinning the ramie fibers obtained in the step 3 on cotton spinning equipment.

Specifically, the ramie fibers obtained in the step 3 sequentially pass through a plucker, an automatic cotton feeder, an A034 six-roller opener, a porcupine opener, a carding machine, a drawing frame, a lap winder, a combing machine, an RSB-D40 type drawing frame, a JWF1415 type roving frame, an F1520 type spinning frame and a No.21C bobbin winder. When the drawing frame carries out drawing, the drawing fibre number is 2 ~ 3, and is generally 6 ~ 8 during the cotton fiber drawing, reduces drawing quantity, when dealing with the fibrilia thick, also avoids the fibrilia inequality to lead to follow-up cotton spinning processing equipment can not normally process.

As shown in fig. 1, 2 and 3, the device comprises a frame 1, two ramie combing mechanisms symmetrically distributed on the frame 1, wherein each ramie combing mechanism comprises a guide cover 2, the guide cover 2 is cylindrical with a gap, a ramie combing roller 3 is rotatably connected in the guide cover 2 at a constant speed, a gap is formed between the guide cover 2 and the ramie combing roller 3, the ramie combing mechanism further comprises a feeding device capable of intermittently feeding ramie bundles into the gap between the guide cover 2 and the ramie combing roller 3, a convex pillow 21 is arranged on the inner wall of the guide cover 2, a plurality of groups of comb teeth 31 and a strip-shaped first cutter 32 are arranged on the surface of the ramie combing roller 3, each group of comb teeth 31 comprises a plurality of comb strips, and comb grooves are formed between adjacent comb strips; the width of the combing groove is gradually increased in the rotating direction of the combing roller 3;

be provided with the eager numb mechanism that is located numb mechanism below in frame 1, cut numb mechanism including rotate a plurality of on frame 1 and cut roller 4 and a plurality of and cut roller two 5, cut roller 4 and cut roller two 5 alternate distribution, and cut roller 4 and cut roller two 5 rotational speeds the same, cut and set up a plurality of second cutters 41 and a plurality of third cutter 51 respectively on roller 4 global and on shearing roller two 5 global.

The feeding device stops feeding after feeding ramie bundles with a certain length into a gap between the guide cover 2 and the ramie roller 3, the ramie roller 3 continuously rotates at a constant speed, the ramie bundles positioned between the guide cover 2 and the ramie roller 3 are divided, combed and straightened, after each group of comb teeth 31 combs the ramie, the convex pillow 21 corresponds to the first cutter 32 to cut off the combed and divided ramie, the cut ramie enters the ramie cutting mechanism under the rotation of the ramie roller 3, and before entering the ramie cutting mechanism, the ramie continuously scrapes, straightens and divides the ramie, particularly the trumpet-shaped comb groove and the plurality of groups of comb teeth 31 can continuously disperse and soften the ramie bundles, thin the fiber and simultaneously curl the fiber, so that the fiber is more similar to cotton fiber.

In the process, the ramie bundle is cut into fiber sections of about 300mm, and the fiber sections enter a ramie cutting mechanism and are cut for the second time to form fibers of about 30 mm.

The axes of the first shearing roller 4 and the second shearing roller 5 are vertical to the axis of the hackling roller 3. The fibers falling out of the gaps are perpendicular to the first shearing roller 4 and the second shearing roller 5 when falling into the first shearing roller 4 and the second shearing roller 5, so that most of the fibers can be cut off by the second cutting knife 41 and the third cutting knife 51 on the first shearing roller 4 and the second shearing roller 5 at the first time.

As shown in fig. 2, 4 and 5, the feeding device includes a discharging roller 61, a first clamping roller 62 and a second clamping roller 63, a rotating shaft 64 is fixed at an eccentric position of the first clamping roller 62 and the second clamping roller 63, the rotating shaft 64 is rotatably connected to the rack 1, a clamping arm 65 is respectively hinged at an axis of the first clamping roller 62 and the axis of the second clamping roller 63, one end of each of the two clamping arms 65 is hinged to each other through a pin, the other end of each of the two clamping arms 65 is hinged to each of the two rotating shafts 64, the feeding mechanism further includes an air cylinder 66, a cylinder body of the air cylinder 66 is fixed to the rack 1, two pressing plates 67 parallel to each other are fixedly arranged on a push rod of the air cylinder 66, the two clamping arms 65 respectively abut against inner side surfaces of the two pressing plates 67, the pin is slidably connected between the two pressing plates 67, and a return spring 68 in a compressed.

When the first clamping roller 62 and the second clamping roller 63 can retract in the cylinder 66, the reset spring 68 springs open the two clamping arms 65, so that the protruding point positions of the first clamping roller 62 and the second clamping roller 63, which are far away from the axis of the rotating shaft 64, are mutually pressed to clamp the fiber bundle, the fiber bundle cannot enter the guide cover 2, otherwise, under the restoring force of the reset spring 68, the positions of the first clamping roller 62 and the second clamping roller 63, which enter the axis of the rotating shaft 64, are just opposite, a gap allowing the fiber bundle to pass through is reserved between the first clamping roller 62 and the second clamping roller 63, and under the rotating action of the combing roller 3, the ramie fiber bundle can be fed.

A receiving hopper 7 is arranged below the first shearing roller 4 or the second shearing roller 5 at the tail end position. Each shearing roller I4 and the shearing roller II 5 form a cutting platform which is positioned below the ramie carding mechanism and can cut ramie fibers for multiple times, the ramie fibers which cannot be filtered through the gap between the shearing roller I4 and the shearing roller II 5 can be carried to the meshing position of the next shearing roller I4 and the shearing roller II 5 until the last shearing roller I4 or the shearing roller II 5, the ramie fibers at the position cannot be cut continuously and fall into the receiving hopper 7, most of the ramie fibers entering the receiving hopper 7 are fibers with neps, and the ramie fibers cannot be filtered through the gap between the adjacent shearing roller I4 and the shearing roller II 5.

A belt wheel 81 is fixed on each of the first shearing roller 4 and the second shearing roller 5, a driving motor 82 is arranged on the frame 1, and a belt 83 is arranged between an output shaft of the driving motor 82 and each belt wheel 81.

The convex pillow 21 is connected with the guide cover 2 through a plurality of pull rods which are connected with the guide cover 2 in a sliding way, and a compression spring 22 is connected between the pull rods and the outer wall of the guide cover 2. The compression spring 22 ensures that the first cutter 32 and the convex pillow 21 have good shearing strength, so that the ramie fibers are crisp in the shearing process, and the fibers are prevented from being pulled and disordered due to incomplete shearing.

As another possibility, the feeding device includes a discharging roller 61, a first clamping roller 62 and a second clamping roller 63, a rotating shaft 64 is fixed at an eccentric position of the first clamping roller 62 and the second clamping roller 63, the rotating shaft 64 is rotatably connected to the frame 1, a clamping arm 65 is respectively hinged at an axis of the first clamping roller 62 and the axis of the second clamping roller 63, one end of each of the two clamping arms 65 is hinged to each other through a pin, the other end of each of the two clamping arms 65 is hinged to each of the two rotating shafts 64, the feeding mechanism further includes an electromagnetic valve fixed to the frame 1, the frame 1 is further slidably connected with a support, the support is provided with two pressing plates 67 parallel to each other, the two clamping arms 65 respectively abut against inner side surfaces of the two pressing plates 67, the pin is slidably connected between the two pressing plates 67, and a return spring 68 in a compressed state is connected between the two. This solution uses an electromagnetic valve instead of the air cylinder 66 in the previous solution, and the effect is similar, and besides these two solutions, the feeding mechanism may also be other mechanisms for controlling the intermittent rotation of the discharging roller 61.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.