CN106801275B - A kind of rove backtwisting spun yarn, which increases, twists spinning apparatus and Yarn spinning method - Google Patents

Abstract

The present invention provides a roving untwisting spun yarn twist increasing spinning device and spinning method, comprising a drafting mechanism and a winding mechanism, a yarn guiding device is arranged between the two, and between the drafting mechanism and the yarn guiding device A twist device is installed, and the upper side belt of the device is in contact with the roving passed through the roving feeding bell mouth to form a roving untwisting working surface, which can realize the untwisting effect on the roving before drafting, thereby reducing the roving in the drafting process. Twisting redistribution phenomenon in the middle, the lower side band is in contact with the fiber strands output by the front roller drafting pair after drafting, forming a pre-twisting degree, which plays a role in enhancing the pre-twisting of the fiber strands before twisting , thereby reducing the twisting triangular area between the front roller nip and the twisting point of the sliver, and improving the overall quality of the yarn.

Description

A kind of roving untwisting spun yarn twist increasing spinning device and spinning method

technical field

The invention relates to the field of spinning new technology, in particular to a roving untwisting and spun yarn increasing twist spinning device and spinning method.

Background technique

Ring spinning, which has a long history, is still the most important spun yarn production method at present. In this way, the fed fiber strips with a certain twist are drawn and slender, and finally twisted into the required spun yarn. However, the main problems of ring spinning are: due to the existence of the twisting triangle, on the one hand, the head and tail ends of the side fibers will not be easily wrapped into the yarn sliver to form hairiness; on the other hand, due to the tension between the side fibers and the center fiber The difference is large, and it is not easy to break at the same time when stretching, resulting in the inability to make full use of the strength of each single fiber and reduce the strength of the single yarn.

In order to solve this problem, researchers in the textile industry have done a lot of research on the twisting triangle of ring spinning, and have achieved a series of fruitful results in theoretical research and engineering practice. Among them, in the research of optimizing and improving the twisting triangle of ring spinning, especially reducing or even eliminating the twisting triangle, the method of enhancing twist transfer has become an important technical means.

However, the existing technical methods generally have low efficiency, uneven twist and strong uneven yarn; the use process is more complicated, which increases the maintenance and maintenance process and is prone to many problems such as large-area brake heads, which makes many existing The method cannot be promoted in large-scale industrialization. In addition, during the drafting process of the roving, due to the twist problem of the roving itself, the redistribution of the twist is easy to occur during the drafting process, which affects the quality of the yarn.

Aiming at this, the present invention provides a roving detwisting spun yarn twist-increasing spinning device and spinning method, by adding a single-wrapping twist device, the roving before being fed into the drafting area can be detwisted and the roving after drafting can be detwisted. The obtained fiber strands are subjected to enhanced twisting before twisting, thereby greatly improving the overall quality of the yarn.

Contents of the invention

The technical problem to be solved by the present invention is to provide a roving detwisting spun yarn twist-enhancing spinning device and a spinning method, so as to realize detwisting of the roving before being fed into the drafting area, and detwisting of the fiber strands obtained after drafting. The enhanced twist before twisting can greatly improve the comprehensive quality of yarn.

In order to achieve the above object, the present invention relates to a roving untwisting spun yarn twisting device, comprising a drafting mechanism and a winding mechanism, the drafting mechanism includes a rear roller drafting pair, a middle roller drafting pair, a front roller The drafting pair, the rear roller drafting pair includes the rear bottom roller and the rear top rubber roller, the middle roller drafting pair includes the middle bottom roller and the middle upper rubber roller, and the front roller drafting pair includes the front bottom roller and the rear top rubber roller. The front upper rubber roller is provided with a roving feeding bell mouth above the drafting pair of rear rollers. The winding mechanism includes a bobbin, and the bobbin is embedded and installed on the spindle, and the spindle is driven by a motor through the spindle belt. Driven to rotate, there is a fixed steel ring around the outer side of the bobbin, the steel ring surrounds the middle and lower part of the bobbin, the ring is a ring structure, the inner circumference of the steel ring and the outer side of the bobbin A certain distance is kept between the circumferences, the steel ring is fixed on the ring plate, and the ring plate is fixed on both sides of the spinning frame, a slideway is arranged on the steel ring, and a There is a traveler, the traveler is a ring structure, the traveler rides in the slideway of the steel ring, the traveler can rotate at a high speed along the slideway of the steel ring, and the front roller drafting pair and A yarn guiding device is arranged between the bobbins, and the yarn guiding device is circular, and the yarn guiding device is fixed on the carriage surface of the spinning machine. The three centers are concentric, and a twist device is respectively arranged between the roving feeding bell mouth and the yarn guide device on the left and right sides of the spinning frame, and the twist device is a ring-shaped belt structure, and the twist The device bypasses the first pulley fixed on the upper right side of the spinning locomotive table, the second pulley fixed on the left upper side of the spinning locomotive table, the third pulley fixed on the left middle side of the spinning locomotive table, and the third pulley fixed on the left lower side of the spinning locomotive table. Four pulleys, the fifth pulley fixed on the lower right side of the spinning locomotive table, the sixth pulley fixed on the right middle side of the spinning locomotive table, and finally wrap around to the first pulley fixed on the upper right side of the spinning locomotive table to realize a round-around structure , the upper side belt between the first pulley and the second pulley is located between the roving feeding bell mouth and the rear roller drafting pair, and the roving comes out from the roving feeding bell mouth and contacts the outer side of the upper side belt of the twist device to form On the roving untwisting working surface, the lower side belt between the fourth pulley and the fifth pulley is located between the front roller drafting pair and the yarn guide device, the fiber strands output by the front roller drafting pair and the lower side belt of the twist device The outer sides are in contact to form a pre-twist working surface. The twist device is driven by the auxiliary motor to rotate clockwise or counterclockwise around the left and right sides of the spinning frame, thereby driving the upper side of the twist device to clockwise or counterclockwise. Clockwise rotation, the lower side belt rotates counterclockwise or clockwise, the upper side belt of the twist device rotates on the roving untwisting working surface to produce rolling friction with the contacting roving, thereby driving the fibers in the roving to surround the central fiber of the roving to produce and The rotation of the upper side belt in the opposite direction, which in turn produces an untwisting twist effect on the roving, which is opposite to the twisting direction of the roving itself, at the end of the roving between the roving feeding bell and the drafting pair of back rollers Gripped by the rear roller drafting pair, the roving located on the untwisting twist working surface is untwisted under the action of the untwisting twist, and then realizes the untwisting process before the roving is fed into the drafting area; the lower side belt of the twist device During the rotation process, the pre-twisted working surface produces rolling friction with the contacting fiber strands, which drives the fibers in the strands to rotate around the central fiber of the strands in the opposite direction to the rotation direction of the lower side belt, and then produces pre-twisted strands. Function, the direction of the pre-twist is the same as that of the final yarn twist, and the twist direction of the roving itself is the same as the twist direction of the final yarn.

The present invention also relates to a roving detwisting and spun yarn twist-increasing spinning method. During spinning, the auxiliary motor drives the twist device to rotate clockwise or counterclockwise around the left and right sides of the spinning machine, thereby driving the twist device. The upper side belt rotates clockwise or counterclockwise, and the lower side belt rotates counterclockwise or clockwise. After the roving passes through the roving bell mouth, it is fed to the rear roller drafting pair through the untwisting twist working surface. At this time, it is located on the untwisting twist working surface. The roving is untwisted under the action of untwisting twist, and the untwisted roving passes through the rear drafting zone composed of the rear roller drafting pair and the middle roller drafting pair, the middle roller drafting pair and the front roller drafting pair. After the drafting action in the front drafting area, the drafted fiber strands with weak twist are obtained. The drafted fiber strands pass through the pre-twisted working surface and pass through the center of the yarn guide device and the traveler in turn. Finally, it is wound on the bobbin, the main motor drives the spindle to rotate through the spindle belt, and then drives the bobbin to rotate, and then drives the traveler to rotate along the slideway of the steel ring through the bypassed fiber whiskers, due to the flexible structure of the fiber whiskers , so that the rotation speed of the traveler is lower than the rotation speed of the bobbin, and the difference between the rotation speed of the traveler and the bobbin has an effect on the original twist of the fiber strands. During the yarn device, due to the friction between the yarn guide device and the fiber strands, it prevents the upward transmission of the original twist and reduces the transmission efficiency of the original twist. At the same time, the contact point between the yarn guide device and the fiber strands forms a barrier. Twist point, then when the original twist is transmitted to the lower side band of the twist device, the twist device drives the fiber strands on the pre-twist working surface to rotate around the center fiber of the strands in the opposite direction to the rotation direction of the lower side band, thereby generating The role of the pre-twist, the direction of the pre-twist is the same as the direction of the original twist, the end of the fiber strands located between the yarn guide device and the front roller draft pair is held by the front roller draft pair, located in the pre-twist working The strands on the surface are twisted under the joint action of the pre-twist and the original twist, and the combination of the pre-twist and the original twist continues to pass upwards, so that the drawn fiber strands are drawn by the front roller. After the mouth thread is output, it directly rotates around the respective central fibers under the combined action of the original twist and pre-twisted degree, so that they are twisted and merged into a spun yarn. Twisting triangular areas are formed in between, and the twisting triangular areas are greatly reduced or even disappear due to the enhanced effect of pre-twist on the transmission of original twist, thereby improving the yarn quality.

The present invention realizes the untwisting of the roving before being fed into the drafting area and the enhanced twisting before twisting of the fiber strands obtained after drafting by installing a single-wrapping twist device, thereby greatly improving the comprehensive quality of the yarn.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the spinning device of the present invention;

Detailed ways

As shown in Figure 1, a roving untwisting spun yarn twisting device includes a drafting mechanism and a winding mechanism. The drafting mechanism includes a rear roller drafting pair 3, a middle roller drafting pair 4, and a front roller drafting pair 5. The rear roller drafting pair includes the rear bottom roller and the rear top rubber roller, the middle roller drafting pair includes the middle bottom roller and the middle upper rubber roller, and the front roller drafting pair includes the front bottom roller and the front upper rubber roller. There is a roving feeding bell mouth 2 above the drafting pair. The winding mechanism includes a bobbin 18. The bobbin is embedded and installed on the spindle. The spindle is driven to rotate by the motor through the spindle belt. There is a fixed steel collar around the outside of the bobbin. 17. The steel ring surrounds the middle and lower part of the yarn bobbin. The steel ring is a ring structure. There is a certain distance between the inner circumference of the steel ring and the outer circumference of the yarn bobbin. The steel ring is fixed on the steel ring plate, and the steel ring plate is fixed. On both sides of the spinning machine, there are slideways on the steel ring, and a traveler 16 is installed in the slideway. The traveler is a ring structure, and the traveler rides on the slideway of the steel ring. The slideway of the collar rotates at a high speed, and a yarn guide device 15 is arranged between the front roller drafting pair and the bobbin. The center of the steel ring and the center of the yarn guide device are concentric, and a twist device 6 is respectively arranged between the roving feeding bell mouth and the yarn guide device on the left and right car tables of the spinning frame, and the twist device is annular. The twist device bypasses the first pulley 9 fixed on the upper right side of the spinning locomotive table top, the second pulley 10 fixed on the left upper side of the spinning locomotive table top, the third pulley 11 fixed on the left middle side of the spinning locomotive table top, The fourth pulley 12 fixed on the lower left side of the table top of the spinning locomotive, the fifth pulley 13 fixed on the lower right side of the table top of the spinning locomotive, the sixth pulley 14 fixed on the middle right side of the table top of the spinning locomotive, and finally wrapped around and fixed on the upper right side of the table top of the spinning locomotive The first pulley 9 on the side realizes a circular structure, the upper side belt 7 between the first pulley and the second pulley is located between the roving feeding bell mouth and the rear roller drafting pair, and the roving 1 is fed into the bell mouth by the roving 2. After coming out, it contacts with the outer side of the upper side belt of the twist device to form a roving untwisting working surface. The lower side 8 belt between the fourth pulley and the fifth pulley is located between the front roller drafting pair and the yarn guide device, and is pulled by the front roller. The stretched and output fiber strands contact the outer side of the lower side belt of the twist device to form a pre-twisted working surface. The twist device 6 is driven by the auxiliary motor to rotate clockwise or counterclockwise around the left and right sides of the spinning frame. , thereby driving the upper side belt 7 of the twist device to rotate clockwise or counterclockwise, and the lower side belt 8 to rotate counterclockwise or clockwise. During the rotation process, the upper side belt 7 of the twist device 6 generates rolling friction with the roving in contact with the roving untwisting working surface , so as to drive the fibers in the roving to rotate around the center fiber of the roving in the opposite direction to the rotation direction of the upper side belt, and then produce an untwisting effect on the roving. The end of the roving between the drafting pair of the back rollers is held by the drafting pair of the back rollers 3, and the roving located on the working surface of the untwisting twist is untwisted under the action of the untwisting twist Twist, and then realize the untwisting process before the roving is fed into the drafting zone; during the rotation process of the lower side belt 8 of the twist device 6, rolling friction occurs between the pre-twist working surface and the contacting fiber strands, thereby driving the fibers in the strands to wrap around The central fiber of the sliver rotates in the opposite direction to the rotation direction of the lower side belt, and then produces a pre-twisting effect on the sliver. The direction of the pre-twisting degree is the same as the direction of the final yarn twist, and the twist of the roving itself is reversed to the final yarn. The twist direction is the same.

During spinning, the auxiliary motor drives the twist device 6 to rotate clockwise or counterclockwise around the left and right car tables of the spinning frame, thereby driving the upper side belt 7 of the twist device 6 to rotate clockwise or counterclockwise, and the lower side belt 8 to rotate counterclockwise. Clockwise or clockwise rotation, the roving 1 passes through the roving bell mouth 2 and then is fed into the rear roller drafting pair through the untwisting twist working surface, at this time, the roving located on the untwisting twist working surface is untwisted under the action of the untwisting twist Twisted, untwisted roving is drafted through the rear drafting zone consisting of rear roller drafting pair 3 and middle roller drafting pair 4, and the front drafting zone consisting of middle roller drafting pair 4 and front roller drafting pair 5 After the action, the fiber strands with weak twist are obtained after drafting. After the drafted fiber strands pass through the pre-twisted working surface, they pass through the center of the yarn guide device 15, the traveler 16, and are finally wound on the yarn On the tube 18, the main motor drives the spindle to rotate through the spindle belt, and then drives the yarn tube 18 to rotate, and then drives the traveler 16 to rotate along the slideway of the steel collar 17 through the bypassed fiber strands. Due to the flexible structure of the fiber strands, The rotational speed of the traveler 16 is lower than the rotational speed of the bobbin 18, and the rotational speed difference between the traveler and the bobbin has an effect on the original twist of the fiber strands, and the original twist is transmitted along the fiber strands from bottom to top, to the When the yarn guide device 15, due to the friction between the yarn guide device and the fiber strands, the upward transmission of the original twist is prevented, reducing the transmission efficiency of the original twist, while the contact point between the yarn guide device 15 and the fiber strands A twist blocking point is formed, and then when the original twist is transferred to the lower side band 8 of the twist device 6, the twist device 6 drives the fiber strands around the center fiber of the strands on the pre-twist working surface to rotate in the opposite direction to the rotation direction of the lower side band 8 , so that the effect of pre-twist is produced on the fiber strands, the direction of the pre-twist is the same as the direction of the original twist, and the end of the fiber strands positioned between the yarn guide device 15 and the front roller drafting pair 5 is drafted by the front roller For holding, the strands located on the pre-twist working surface are twisted under the joint action of the pre-twist and the original twist, and the pre-twist and the original twist continue to pass upward after being combined, so that the fiber strands after drafting After being output by the nip line of the front roller drafting pair 5, it directly rotates around the respective central fibers under the combined action of the original twist and the pre-twisting degree, so that they are twisted and merged into spun yarns, and the fiber strands are drawn by the front roller drafting pair Twisting triangular areas are formed between the nip line and the point where the spun yarn merges into yarns. Due to the enhanced effect of the pre-twist on the transmission of the original twist, the twisting triangular areas are greatly reduced or even disappeared, thereby improving the yarn quality.

Claims (2)

1. a kind of rove backtwisting spun yarn, which increases, twists spinning apparatus, including draft mechanism and winding mechanism, after the draft mechanism includes Roller draft to, middle roller drawing-off to, front roller drawing-off pair, the rear roller drawing-off to including rear bottom roll and rear upper glue roller, The middle roller drawing-off is to including middle bottom roller and middle upper glue roller, and the front roller drawing-off is to including preceding bottom roll and preceding gluing Roller, in the rear the top of roller draft pair be provided with rove feeding horn mouth, the winding mechanism includes spool, the spool Embedded to be mounted on spindle, the spindle is driven by motor by spindle band and is rotated, and is surrounded on the outside of the spool fixed Rings, the rings are looped around the middle and lower part of spool, and the rings is circular ring structure, the inside circumference of the rings and spool Certain spacing, the rings is kept to be fixed on ring rail between outer circumference, the ring rail is fixed on the two of spinning frame Side is provided with slideway on the rings, wire loop is added in the slideway, the wire loop is circular ring structure, described Wire loop straddles in the slideway of rings, and the wire loop can be along the slideway high-speed rotation of rings, in the front roller drawing-off Feed carrier pair is provided between spool, the feed carrier is circular ring shape, and the feed carrier is fixed on the vehicle of spinning frame On table top, the axis of rotation of the spindle, the center of rings, the center three of feed carrier are concentric, it is characterized in that：In spinning frame Left side ride face and right side ride face rove feeding horn mouth and feed carrier between be respectively arranged with twist device, it is described Twist device is the banded structure of annular, and the twist device bypasses the first cunning for being fixed on spun yarn locomotive platform face upper right side successively Take turns, the second pulley that is fixed on spun yarn locomotive platform face upper left side, the third pulley for being fixed on the left side in spun yarn locomotive platform face, fixation Spun yarn locomotive platform face lower left side the 4th pulley, be fixed on spun yarn locomotive platform face lower right side the 5th pulley, be fixed on spun yarn Right mediolateral 6th pulley of locomotive table top finally unrolls to the first pulley for being fixed on spun yarn locomotive platform face upper right side, realizes one The circulating type structure in week, the upper side band between the first pulley and second pulley is located at rove feeding horn mouth and rear roller is led Stretch between, rove by rove feeding horn mouth out after be in contact on the outside of twist device upper side band, formation rove backtwisting Working face, the lower sideband between the 4th pulley and the 5th pulley is between front roller drawing-off pair and feed carrier, by preceding Roller draft forms pre- amount of twist working face to being in contact on the outside of the fiber strip and twist device lower sideband of output, described Twist device is driven by auxiliary-motor and is rotated clockwise or counterclockwise around the left side ride face of spinning frame and right side ride face, from And drive the upper side band of twist device to rotate clockwise or counterclockwise, lower sideband counterclockwise or rotate clockwise, the twirl It spends in the upper side band rotation process of device and generates rolling friction with the rove of contact on rove backtwisting working face, to which band is used force Fiber in yarn generates the rotation opposite with upper side band rotation direction around the center fiber of rove, then generates backtwisting to rove The twist acts on, and the direction of the backtwisting twist is with the direction of rove itself twist on the contrary, positioned at rove feeding horn mouth and rear sieve Dragline stretches the end of the rove between by rear roller drawing-off to holding, and the rove being located on backtwisting twist working face is twisted in backtwisting By backtwisting under the action of degree, the untwisting process before rove feeding draft area is then realized；The lower sideband of the twist device turns Rolling friction is generated with the fiber strip of contact on pre- amount of twist working face during dynamic, to drive the fiber in yarn to surround The center fiber of yarn generates the rotation opposite with lower sideband rotation direction, and then generating pre- amount of twist to yarn acts on, described The direction of pre- amount of twist and final identical at the direction of twist per unit, the reversed twist side with final resultant yarn of the twist of rove itself To identical.

2. a kind of based on a kind of rove backtwisting spun yarn increasing twirl spinning of rove backtwisting spun yarn increasing twirl spinning apparatus described in claim 1 Yarn method, it is characterized in that：When spinning, auxiliary-motor drives twist device ring suitable around the left side ride face of spinning frame and right side ride face Hour hands rotate counterclockwise, and to drive the upper side band of twist device to rotate clockwise or counterclockwise, lower sideband is counterclockwise Or rotate clockwise, rove feeds rear roller drawing-off pair after across rove horn mouth through backtwisting twist working face, at this time position In the rove on backtwisting twist working face by backtwisting under the action of the backtwisting twist, the rove after backtwisting is via rear roller drawing-off pair The drawing-off of the front draft zone of composition is made in the first break draft area of composition, middle roller drawing-off pair and front roller drawing-off with middle roller drawing-off With rear output, obtain the fiber strip with weak twist after drawing-off, the fiber strip after drawing-off after pre- amount of twist working face according to Secondary to be finally wound on spool across the center of feed carrier, wire loop, main motor drives spindle rotation by spindle band, then Drive spool rotation, then by around fiber strip drive wire loop along rings slideway rotate, due to fiber strip Flexible structure so that the velocity of rotation of wire loop is less than the velocity of rotation of spool, and the speed discrepancy of wire loop and spool is to fiber Yarn generates the effect of the original twist, which is transmitted from bottom to top along fiber strip, is transmitted to feed carrier When, due to the rubbing action between feed carrier and fiber strip, interception is played to being communicated up for the original twist, is reduced The transmission efficiency of the original twist, while the contact point of feed carrier and fiber strip forms a resistance twist point, then when original twirl When degree is transmitted to the lower sideband of twist device, twist device drives fiber strip to surround yarn center on pre- amount of twist working face Fiber generates the rotation opposite with lower sideband rotation direction, to generate the effect of pre- amount of twist, pre- amount of twist to fiber strip Direction it is identical as the direction of the original twist, the end of the fiber strip between feed carrier and front roller drawing-off pair is preceding To holding, the yarn on pre- amount of twist working face is added roller draft under the collective effect of pre- amount of twist and the original twist It twists, continues to be communicated up after pre- amount of twist and the merging of the original twist, so that the fiber strip after drawing-off is led by front roller Stretch to jaw line output after directly under the comprehensive function of the original twist and pre- amount of twist around respective center fiber rotate, To which respectively twisting merges into spun yarn, fiber strip is formed between front roller drawing-off converges jaw line to spun yarn yarn forming point to be added Trigonum is twisted, since pre- amount of twist is to the humidification of original yarn twist unevenness, is even disappeared to which twist triangle zone substantially reduces, So as to improve yarn quality.