A spinning method and spinning device for reciprocating cross motion twisting to control fiber arrangement structure

Abstract

The present invention provides a spinning method and a spinning device for reciprocating crosswise twisting to control the fiber arrangement structure. The spinning device includes a front roller, a twisting roller, a fixed bracket, and a reciprocating threaded shaft rod. The twisting roller is connected to the front roller through an idler gear. Two twisting leather rollers are symmetrically arranged above the twisting roller, and a central hole is provided inside each of the two twisting leather rollers, and a guiding block is fixed in each of the two central holes. One end of the fixed bracket is stuck on the leather roller shaft rod, and the other end is fixed in the middle of the reciprocating threaded shaft rod. Reciprocating threads are provided at both ends of the reciprocating threaded shaft rod, and the two guiding blocks can be movably embedded in the two reciprocating threads respectively. The beneficial effects of the present invention are as follows: By providing reciprocating threads at both ends of the reciprocating threaded shaft rod and enabling the guiding blocks to be slidably embedded in the reciprocating threads, while the twisting leather rollers are rotating, the guiding blocks will move along the reciprocating threads, so that the twisting leather rollers make a reciprocating crosswise movement on the twisting roller, thereby applying twisting to the surface of the yarn.

Description

Technical Field

[0001] The present invention relates to the technical field of textile processing, and particularly to a spinning method and a spinning device for reciprocating cross motion twisting and controlling fiber arrangement structure. Background Art

[0002] Twisting is a necessary means for fiber yarn formation. Before twisting, fibers first agglomerate into a fiber sliver. After twisting, the outer fibers of the sliver are extruded inward to generate a centripetal pressure, so that the sliver obtains frictional force along the fiber length direction, forming a yarn with certain properties for processing and weaving.

[0003] Ring spinning technology is widely used due to its strong adaptability to raw materials and wide range of produced varieties, but it also has drawbacks such as many yarn hairiness, long production process, difficult quality control, and low efficiency. In the traditional ring spinning twisting process, the twist is generated by the movement of the traveler. After the twist is generated, it is transmitted from bottom to top to the twisting point. During the twisting process, the fibers at the front roller nip rotate around the axis of the sliver, causing the width of the sliver to gradually decrease, and the two sides fold to form a twisting triangle area. In the twisting triangle area, the width and cross-section of the sliver change, gradually forming an approximately cylindrical yarn from a flat shape, and finally forming a yarn available for weaving. At the same time, since the hairiness formed during twisting is the product of the contradiction between the torque and bending moment acting on the fiber and the anti-torsion moment and anti-bending moment of the fiber, therefore, making the sliver twist and form is a key process in the yarn forming process.

[0004] In response to these problems, the compact spinning technology has developed rapidly in recent years, and has remarkable effects in aspects such as improving yarn strength and reducing hairiness, but it has led to new problems such as tight yarn, hard hand feeling of the made fabric, and high production energy consumption. The compact spinning process uses the agglomeration effect of the negative pressure device to reduce the width of the sliver, eliminating the original spinning twisting triangle area, so that all fibers are tightly agglomerated into the twisting yarn body. Although it reduces yarn hairiness and improves yarn strength to a certain extent, the air-jet compact spinning process still has problems such as complicated operation, high energy consumption, and high production cost.

[0005] The self-twist spinning process is a spinning method in which a pair of reciprocating and rotating rollers are arranged between two holding points. The sliver is rubbed by this pair of rollers, so that two fiber slivers form a ply yarn twisted together. Although its spinning tension is small, the yarn is soft, the shrinkage rate is small, the production efficiency is high, and the process flow can be shortened, the self-twist spinning process has not been widely used because the production equipment of the self-twist spinning process is complex to process, the cost is high, and the strength of the spun yarn is low.

[0006] Meanwhile, compared with other new spinning methods, self-twist spinning eliminates the roving and winding processes in the technological process, achieving a short technological process for spinning. At the same time, it has advantages such as large package and fewer workers, so it has been studied by people. The twisting roller twisting mechanism was first applied to the self-twist spinning machine by another Australian scholar GW. Walls (QW.Wmls). By using two planetary gear mechanisms to drive two connecting rods to two self-twist rollers respectively, reciprocating motion is achieved under the support of the air shaft. The earliest company to produce self-twist spinning machines was the Australian Repco company, and the machine name was Repco. Therefore, some people call self-twist spinning Repco spinning. The most representative model of the self-twist spinning machines produced by this company is Repco 891. Later, they transferred all the production and sales rights of the self-twist spinning machines to the Platt-Saco Lowell Corporation. The latter designated the models of the self-twist spinning machines they produced as MKI and MK2 (equivalent to Repco 891). After that, the British Macart company integrated pre-drafting, main drafting, self-twisting, bulking, doubling, and winding into one, and integrated the self-twist spinning machine into the S300 spinning system, which is mainly used for processing acrylic bulk yarn. In 2006, Macart transferred the production rights to Tianjin Hongda Textile Machinery Co., Ltd. in China. The products produced by the foreign self-twist spinning method are mainly worsted wool and woolen acrylic bulk yarns, and are mostly used for knitting, and can also be used to process coarse wool to weave carpets. The self-twist spinning technology was introduced into China in the early 1970s. The Shanghai Textile Research Institute and the Shanghai No. 5 Woolen Mill first applied it to worsted wool spinning. At that time, the self-twist spinning machines were manufactured in China, and the machine types were similar to Repco. The twisting roller bearings used two-way ball bearings. In addition, due to the poor balance of the planetary gear train and the use of chain drives in many places, the spinning speed was relatively low, generally less than 150 meters per minute. Later, in Beijing, Shanghai, Tianjin, Liaoning, Guangxi, Jiangsu and other places, in addition to continuing to expand the application in worsted wool spinning, the self-twist spinning technology was also developed to medium-length chemical fibers, acrylic bulk yarns, ramie, and vinylon and other fields. Since the self-twist spinning machine has a relatively simple structure, textile factories in many regions manufactured self-twist spinning machines by themselves, and there were also 4-5 textile machinery factories trial-producing self-twist spinning machines, so the machine types were relatively complicated. During this period, the domestic self-twist spinning technology also created some projects with national characteristics, among which the main ones were: self-twist spinning of medium-length chemical fibers with extra-large draft; acrylic bulk drafting-cutting-re-twist spinning with an extremely short technological process; miniaturization of the double self-twist spinning machine with a straight yarn path up and down; diversification of self-twist spinning raw materials and product varieties represented by colored medium-length chemical fibers, etc.

[0007] However, there are serious problems in self-twist spinning that restrict its development. That is, self-twisting will form a twistless zone, the yarn strength will deteriorate severely, and the yarn quality is difficult to guarantee. At the same time, it is only applicable to long fibers, and it is difficult to apply to short fibers with the largest consumption area. Summary of the Invention

[0008] In view of the deficiencies of the prior art, the present invention provides a spinning method and a spinning device for reciprocating cross motion twisting to control the fiber arrangement structure, which can effectively improve the quality of the yarn and increase the yarn strength.

[0009] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0010] A spinning method for reciprocating cross motion twisting to control the fiber arrangement structure, the spinning method comprising the following steps:

[0011] S1. After the roving is drafted by the drafting mechanism, the yarn is output from the front nip formed by the front roller and the front apron roller.

[0012] S2. When the yarn passes through the meshing line formed by the twisting apron roller and the twisting roller, the twisting apron roller transversely moves to push the yarn to flip and twist and finish the yarn.

[0013] S3. The yarn after being twisted in the above step S2 is wound on the spindle through the yarn guide hook and the traveler under the traction of the yarn tension.

[0014] Further, in the above step S2, during the twisting and flipping process of the yarn driven by the transverse movement of the twisting apron roller, when the twisting apron roller moves transversely to the left, the twisting apron roller applies a Z-direction twist to the yarn, and when the twisting apron roller moves transversely to the right, the twisting apron roller applies an S-direction twist to the yarn.

[0015] Meanwhile, the present invention also provides a spinning device for implementing the spinning method for reciprocating cross motion twisting to control the fiber arrangement structure. The spinning device includes a front roller, a twisting roller, a fixed bracket, and a reciprocating threaded shaft. Two front apron rollers are symmetrically arranged above the front roller. The twisting roller is located in front of the front roller and is connected to the front roller through an idler gear. Two twisting apron rollers are symmetrically arranged above the twisting roller. Both of the two twisting apron rollers are located in front of the two front apron rollers, and a central hole is provided inside each of the two twisting apron rollers, and a guide block is fixed in each of the two central holes. One end of the fixed bracket is provided with a C-shaped card slot, and the C-shaped card slot is stuck on the apron roller shaft of the two front apron rollers. The other end of the fixed bracket is fixed in the middle of the reciprocating threaded shaft. Reciprocating threads are provided at both the left and right ends of the reciprocating threaded shaft. The two guide blocks are respectively movably embedded in the two reciprocating threads, and the two guide blocks respectively control the two twisting apron rollers to perform reciprocating cross motion in the corresponding reciprocating threads while rotating. The transverse movement and friction twisting between the two twisting apron rollers and the twisting roller are respectively used to finish the fiber structure of the yarn.

[0016] Further, the reciprocating thread includes a right-handed thread groove and a left-handed thread groove. The right-handed thread groove and the left-handed thread groove have the same pitch and opposite helix directions, and the two ends of the right-handed thread groove and the two ends of the left-handed thread groove are respectively connected by a curved transition.

[0017] Further, the two twisting rollers are respectively movably connected to the two ends of the reciprocating thread shaft through the two guiding blocks. The two ends of the reciprocating thread shaft respectively penetrate through the two central holes, and the reciprocating thread shaft has a clearance fit with the two central holes.

[0018] Further, two fixing brackets are arranged side by side between the roller shaft and the reciprocating thread shaft.

[0019] Further, the two guiding blocks are both crescent-shaped, and the two guiding blocks are respectively fixed to the inner surface of the corresponding central hole through connecting rods.

[0020] The beneficial effects brought by the technical solution provided by the embodiment of the present invention are as follows: In the spinning device with a reciprocating traverse twisting control fiber arrangement structure of the present invention, by arranging the reciprocating thread at both ends of the reciprocating thread shaft and making the guiding block slidably embedded in the reciprocating thread, when the twisting roller rotates, the guiding block will move in the reciprocating thread, so that the twisting roller makes a reciprocating traverse movement on the twisting roller, thereby applying twisting to the surface of the yarn; in addition, the spinning device with a reciprocating traverse twisting control fiber arrangement structure of the present invention has the advantages of ingenious structure, low cost and convenient operation, and it can also be directly installed and used on a ring spinning frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a top view of the spinning device with a reciprocating traverse twisting control fiber arrangement structure of the present invention.

[0022] Figure 2 is Figure 1 a cross-sectional schematic view taken along line A-A in

[0023] Figure 3 is Figure 1 a schematic structural view of the reciprocating thread shaft 4 in

[0024] Figure 4 is Figure 1 an internal connection schematic view of the reciprocating thread shaft 4 and the twisting roller 7 in

[0025] In the figure: 1 - front roller, 2 - twisting roller, 3 - fixed bracket, 31 - C-shaped card slot, 4 - reciprocating threaded shaft rod, 41 - reciprocating thread, 42 - positive thread groove, 43 - reverse thread groove, 5 - idler gear, 6 - front top roller, 61 - top roller shaft rod, 7 - twisting top roller, 71 - central hole, 72 - guide block, 73 - connecting rod, 8 - yarn. Detailed implementation mode

[0026] To make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] Please refer to Figure 1 and Figure 2 , the embodiment of the present invention provides a spinning device for reciprocating crosswise twisting and controlling the fiber arrangement structure, including a front roller 1, a twisting roller 2, a fixed bracket 3 and a reciprocating threaded shaft rod 4.

[0028] Above the front roller 1, two front top rollers 6 are symmetrically arranged. The twisting roller 2 is located in front of the front roller 1 and is connected to the front roller 1 through an idler gear 5. In this embodiment, gears matching with the idler gear 5 are arranged on both the twisting roller 2 and the front roller 1. The front roller 1 is used to drive the idler gear 5 to rotate, so that the idler gear 5 drives the twisting roller 2 to rotate, and the linear speed of the twisting roller 2 is controlled to be the same as that of the front roller 1, realizing the synchronous rotation of the twisting roller 2 and the front roller 1.

[0029] Please refer to Figure 1 and Figure 4 , above the twisting roller 2, two twisting top rollers 7 are symmetrically arranged. Both of the two twisting top rollers 7 are located in front of the two front top rollers 6, and central holes 71 are arranged inside both of the two twisting top rollers 7. Both of the two central holes 71 are through holes, and a guide block 72 is fixed in each of the two central holes 71. In this embodiment, both of the two guide blocks 72 are crescent-shaped, and both of the two guide blocks 72 are fixed to the inner surface of the corresponding central hole 71 through a connecting rod 73.

[0030] One end of the fixed bracket 3 is provided with a C-shaped card slot 31. The C-shaped card slot 31 is stuck on the top roller shaft rods 61 of the two front top rollers 6. The other end of the fixed bracket 3 is fixed to the middle of the reciprocating threaded shaft rod 4. In this embodiment, the fitting state of the twisting top roller 7 and the twisting roller 2 can be adjusted by adjusting the fixing angle of the C-shaped card slot 31, so as to change the twisting force of the twisting top roller 7 on the yarn 8, so that the present invention can be applicable to various different types of yarn counts. In the present invention, in order to keep the position of the reciprocating threaded shaft rod 4 fixed without rotation, two of the fixed brackets 3 are arranged side by side between the top roller shaft rod 6 and the reciprocating threaded shaft rod 4.

[0031] Please refer to Figure 3 and Figure 4 , both left and right ends of the reciprocating threaded shaft rod 4 are provided with reciprocating threads 41, the reciprocating threads 41 include a positive thread groove 42 and a reverse thread groove 43, the positive thread groove 42 and the reverse thread groove 43 have the same pitch and opposite helix directions, and both ends of the positive thread groove 42 and both ends of the reverse thread groove 43 are respectively connected by a curved transition, so that the positive thread groove 42 and the reverse thread groove 43 are connected into a continuous thread channel. The two guide blocks 72 are respectively movably embedded on the two reciprocating threads 41, so that the two twisting rollers 2 are respectively movably connected to the reciprocating threaded shaft rod 4 through the two guide blocks 72. At the same time, both ends of the reciprocating threaded shaft rod 4 respectively penetrate through the two central holes 71, and the reciprocating threaded shaft rod 4 and the two central holes 71 are in clearance fit.

[0032] In the present invention, after the yarn 8 enters the meshing line of the twisting roller 7 and the twisting roller 2, the twisting roller 7 and the twisting roller 2 maintain the same linear speed as the front roller 1, so no drafting is generated. Only the reciprocating transverse movement of the twisting roller 7 relative to the twisting roller 2 combs the yarn 8. The process of the twisting roller 7 combing the yarn 8 is as follows: when the guide block 72 slides in the positive thread groove 42, the guide block 72 is pushed by the side of the positive thread groove 42 and moves axially to the left along the reciprocating threaded shaft rod 4. The spun yarn 8 is turned to the left during the friction twisting process of the twisting roller 7 closely adhering to the left movement of the twisting roller 2, and forms a "Z twist" false twist in the direction of the yarn guide hook; similarly, when the guide block 72 slides in the reverse thread groove 43, the guide block 72 is pushed by the side of the reverse thread groove 43 and moves axially to the right along the reciprocating threaded shaft rod 4. The spun yarn 8 is turned to the right during the friction twisting process of the twisting roller 7 closely adhering to the left movement of the twisting roller 2, and at the same time forms an "S twist" false twist in the direction of the yarn guide hook. The formation of the "Z twist" or "S twist" false twist can effectively control the shape of the spinning triangle area and improve the fiber transfer efficiency; in addition, the twisting of the yarn 8 under the transverse movement of the twisting roller 7 forces the exposed fibers of the yarn 8 to be re-twisted into the main body of the yarn 8, that is, the fiber twisting and agglomeration of the yarn 8, reduces the generation of fiber hairiness, and improves the strength of the yarn 8.

[0033] Please refer to Figures 1-4 , the embodiment of the present invention also provides a spinning process of a spinning device with a reciprocating transverse movement twisting control fiber arrangement structure, including the following steps:

[0034] S1. After the roving is drafted by a drafting mechanism (not shown in the drawings), the yarn 8 is output from the front nip formed by the front roller 1 and the front roller 6;

[0035] S2. Adjust the installation angle of the fixed bracket 3 so that the twisting roller 7 presses tightly against the twisting spindle 2. The front roller 1 drives the twisting spindle 2 to rotate through the intermediate gear 5. Thus, the twisting spindle 2 drives the twisting roller 7 to rotate at the same linear speed. At the same time, the guide block 72 drives the twisting roller 7 to move horizontally back and forth under the push of the reciprocating thread 41. When the yarn 8 passes through the meshing line where the twisting roller 7 and the twisting spindle 2 are combined, the horizontal movement of the twisting roller 7 pushes the yarn 8 to flip and twist and finish the yarn 8. Specifically, during the twisting and flipping process of the yarn 8 driven by the horizontal movement of the twisting roller 7, when the twisting roller 7 moves horizontally to the left, the twisting roller 7 applies a Z-direction twist to the yarn 8. When the twisting roller 7 moves horizontally to the right, the twisting roller 7 applies an S-direction twist to the yarn 8;

[0036] S3. The yarn 8 passing through the meshing line where the twisting roller 7 and the twisting spindle 2 are combined is wound around the spindle under the traction of the yarn tension through the yarn guide hook and the traveler.

[0037] The following are specific embodiments of spinning using a traditional ring spinning frame and the spinning device of the present invention respectively:

[0038] In this embodiment, a 19.7 tex siro spinning yarn is spun using a traditional ring spinning frame and the spinning device of the present invention respectively for a comparative experiment. During the spinning process, the traditional ring spinning frame adopts the traditional spinning process, and the spinning device of the present invention adopts the spinning process of the present invention. And during the spinning process, the raw materials and some spinning process parameters used by the traditional ring spinning frame and the spinning device of the present invention are the same. And the main properties of the yarn samples of each yarn count are tested. The main property test results of each yarn sample are shown in Table 1:

[0039] Table 1 Main properties of the yarns spun using a traditional ring spinning frame and the spinning device of the present invention

[0040]

[0041]

[0042] As can be seen from Table 1, for the yarn spun using the spinning device of the present invention, its hairiness value decreases significantly; and compared with the yarn spun using the traditional ring spinning frame, the breaking strength and breaking elongation of the yarn spun using the spinning device of the present invention increase significantly, while the evenness performance can basically remain unchanged, and the ply structure of the spun 19.7 tex siro spinning yarn is more obvious, the new yarn style is more prominent, the twist distribution law is more uniform, the weak twist area decreases, and the yarn weak joints decrease.

[0043] In this text, the orientation terms such as front, rear, upper, and lower are defined based on the positions of the components in the drawings and their relative positions to each other, solely for the clarity and convenience of expressing the technical solution. It should be understood that the use of these orientation terms should not limit the scope of protection claimed in this application.

[0044] Without conflict, the embodiments described in this text and the features in the embodiments may be combined with each other.

[0045] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A spinning device for reciprocating traverse twisting to control the fiber arrangement structure, which is used to realize the spinning method of reciprocating traverse twisting to control the fiber arrangement structure. The spinning method comprises the following steps: S1. After the roving is drafted by the drafting mechanism, the yarn is output from the front nip formed by the front roller and the front top roller; S2. When the yarn passes through the meshing line formed by the twisting top roller and the twisting roller, the reciprocating traverse of the twisting top roller pushes the yarn to flip and twist and finish the yarn; S3. The yarn after being twisted in the above step S2 is wound on the spindle through the yarn guide hook and the traveler under the traction of the yarn tension; In the above step S2, during the twisting and flipping process of the yarn driven by the reciprocating traverse of the twisting top roller, when the twisting top roller moves leftward, the twisting top roller applies Z-direction twist to the yarn, and when the twisting top roller moves rightward, the twisting top roller applies S-direction twist to the yarn. It is characterized in that the spinning device comprises a front roller, a twisting roller, a fixed bracket and a reciprocating threaded shaft. Two front top rollers are symmetrically arranged above the front roller. The twisting roller is located in front of the front roller and is connected to the front roller through an intermediate gear. Two twisting top rollers are symmetrically arranged above the twisting roller. Both of the two twisting top rollers are located in front of the two front top rollers, and a central hole is arranged inside each of the two twisting top rollers, and a guide block is fixed in each of the two central holes. One end of the fixed bracket is provided with a C-shaped clamping groove, and the C-shaped clamping groove is clamped on the top roller shaft of the two front top rollers. The other end of the fixed bracket is fixed in the middle of the reciprocating threaded shaft. Reciprocating threads are arranged at both the left and right ends of the reciprocating threaded shaft. The two guide blocks are respectively movably embedded in the two reciprocating threads, and the two guide blocks respectively control the two twisting top rollers to perform reciprocating traverse movements in the corresponding reciprocating threads while rotating. The transverse movement friction twisting between the two twisting top rollers and the twisting roller is respectively used to finish the fiber structure of the yarn.

2. The spinning device for reciprocating traverse twisting to control the fiber arrangement structure according to claim 1, characterized in that: The reciprocating thread comprises a positive thread groove and a reverse thread groove. The positive thread groove and the reverse thread groove have the same pitch and opposite helix directions, and the two ends of the positive thread groove and the two ends of the reverse thread groove are respectively connected by curve transitions.

3. The spinning device for reciprocating traverse twisting to control the fiber arrangement structure according to claim 1, characterized in that: The two twisting rollers are respectively movably connected to the two ends of the reciprocating threaded shaft through the two guide blocks. The two ends of the reciprocating threaded shaft respectively penetrate through the two central holes, and the reciprocating threaded shaft and the two central holes are in clearance fit.

4. The spinning device for reciprocating traverse twisting to control the fiber arrangement structure according to claim 1, characterized in that: Two fixed brackets are arranged side by side between the top roller shaft and the reciprocating threaded shaft.

5. The spinning device for reciprocating traverse twisting to control the fiber arrangement structure according to claim 1, characterized in that: Both of the two guide blocks are crescent-shaped, and both of the two guide blocks are fixed to the inner surface of the corresponding central hole through a connecting rod.

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