CN114540999B - Equal-spacing double-channel ring spinning device with single drafting zone - Google Patents

Abstract

The invention belongs to the technical field of ring spinning, and relates to an equal-space-distance double-channel ring spinning device with a single drafting zone. According to the invention, two channels of back rollers, two channels of back upper sizing rollers, two channels of upper pins and two channels of lower pins are designed, and the double-yarn guide pressure bars and the improved compact spinning device are configured, so that two independent single drafting zones with equal spacing are obtained, and the independent drafting and the online variable drafting of the double rovings are realized. The positions of a middle roller and a rear roller of a traditional compact spinning frame can be used as the two-channel rear roller and looper ring driving shaft, the roller seat of a drafting device of the original spinning frame is not required to be replaced, the original middle roller can be replaced by a two-channel rear roller, the original rear roller can be replaced by the looper ring driving shaft, and a two-channel lower pin, a two-channel rear upper rubber roller, a two-channel lower pin, an upper leather collar and a lower leather collar and the like are replaced. The change of the output quantity of the two rovings is realized by adjusting the drafting times of the two drafting channels on line, and the two-component color-changing yarn is spun. Flexible and changeable, and strong applicability.

Description

A dual-channel ring spinning device with equal intervals and single drafting zone

technical field

The invention belongs to the technical field of ring spinning, and relates to a ring spinning device with equal intervals and double channels in a single draft zone.

Background technique

The multi-roving feeding of ring spinning was first marked by the siro spinning technology. The purpose of the siro spinning technology is to gather and twist two bundles of fibers at a certain distance to form a yarn, so as to obtain less hairiness, high strength, and strand effect High-quality yarn, the method is to feed two rovings of the same specification at a larger distance between the ring spinning rear rollers, the two rovings pass through the same drafting area, and then output at the front roller nip at the same time, converge and twist into yarn.

On the basis of feeding multiple raw materials, it is hoped to realize the independent drafting of each raw material. Japanese Patent Publication No. 2000-110035 (application date: April 18, 2000) discloses a coaxial 3-DOF rear roller structure, the middle bushing is driven by the roller shaft, and the bushings on both sides are respectively connected by gears Drive, and apply this structure to the drafting mechanism of the roving frame, and realize the independent drafting of the rear area of the three raw materials; the "equal linear density ring spinning section color yarn forming method" disclosed in the Chinese invention patent (ZL201010616326.9) "And device" designs the drafting tooth surface part of the back roller of the spinning frame into two juxtaposed independent parts, one part is fixed on the back roller shaft, and the other part is looped on the back roller shaft, driven independently by a transmission shaft. The two rovings are respectively fed to two rear rollers arranged side by side, realizing two-channel independent drafting in the rear area of the spinning frame. However, the drafting mechanism of the spinning frame is in the form of double drafting zones, and the rear zone is drafted by simple rollers. In order to effectively control the fibers in the roving during the drafting process, the drafting ratio in the rear zone of the spinning frame is relatively small, generally 1.1 to 1.3, On the basis of sharing the main drafting area, the adjustment range of the total drafting multiple of the two rovings is relatively limited to realize the independent drafting of the two channels in the rear area, and the independent drafting of the two drafting channels cannot be fully realized.

Chinese invention patent ZL201580016832.5 discloses a "drafting device and its control method for a spinning machine". The device divides the upper and lower aprons of the drafting device into left and right parts. Across the middle top roller and the middle roller, driven by the rear roller and the rear top roller, forming two independent drafting channels on the left and right, one drafting channel is formed by the middle roller and the front roller, and the other drafting channel is formed by the rear roller Formed with front rollers, this enables independent drafting of the two rovings. However, since one of the drafting passages is formed by the rear roller and the front roller, and is affected by the middle roller, the distance between the rear roller and the front roller cannot be effectively reduced. The distance between the front and rear gripping points of this drafting passage It is much larger than the other drafting channel. For short-fiber spinning, the distance between the front and rear gripping points in the drafting zone must match the length of the fiber, so that the fiber speed change points during the drafting process are consistent and stable, and uniform drafting is obtained. Therefore, although the two drafting passages with unequal intervals in this patent have realized the independent drafting of the two drafting passages, one of the drafting passages with a large interval cannot achieve the desired drafting effect.

Contents of the invention

The technical problem to be solved by the present invention is to provide a ring spinning device with equal intervals and double channels in a single drafting zone, in particular to a spinning method for ring spinning with two rovings independently drafted and spun into a color-changing yarn. The invention adopts the design of the rear roller and the rear top rubber roller with two coaxial independent rotation degrees, the dual-channel upper pin with the rear pressure bar, the dual-channel lower pin, the air flow guide sheet of the concentrated spinning and the negative pressure suction of the dual-channel compact spinning. Air ducts, forming two ring spinning devices with single drafting zone equidistant independent drafting channels. Realize the spinning of two-component color-changing yarn on the ring spinning frame, and realize the design of the device with the total number of spindles (6 spindles or 8 spindles for a single roller), which can be retrofitted on the ordinary ring compact spinning frame at low cost and conveniently.

Technical scheme of the present invention is as follows:

A double-channel ring spinning device with equal intervals in a single draft zone, including double bell mouths, double-channel rear rollers, dual-channel rear top rollers, front rollers, front top rollers, compact spinning negative pressure tubes, compact Spinning output rollers, compact spinning output rollers, yarn guide hooks, steel rings and travellers; the double bell mouths are fixed above the bell mouth fixed crossbars, and the front yarn guide pressure rod and the rear yarn guide pressure rod pass through the double channel upper pins One end is fixed and is located behind the double bell mouth. The dual-channel rear rollers and the dual-channel rear top rubber rollers constitute the drafting channel. The stretching channel is located behind the dual-channel rear rollers and the dual-channel rear upper rubber rollers; the compact spinning negative pressure tube is located behind the front rollers to gather and merge the two bundles of fiber strands; the compact spinning output rollers and compact spinning output rollers are located in the front Behind the roller and the front top rubber roller, the yarn is grasped and output, and then twisted into yarn, which is wound onto the bobbin through the yarn guide hook and traveler.

The roving A and the roving B are respectively fed into the holes of the double horns fixed on the cross bar, and then pass through the upper side of the rear yarn guide pressure bar and the lower side of the front yarn guide pressure bar, and then are respectively fed into the two rear rollers. Two independent drafting channels pass through the drafting area and are drawn out at the nip of the front roller, and enter the negative pressure airflow area of the compact spinning, where the two fiber bundles with relatively large distances shrink laterally under the action of the airflow and converge into a single fiber bundle, and then are gathered The spinning output roller and the compact spinning output rubber roller hold and output.

The purpose of the preceding yarn guiding pressure bar and the rear yarn guiding pressure bar is to pretension the roving fed into the drafting zone. The drafting device of the traditional ring spinning frame is divided into two drafting areas, the front drafting area is the apron drafting area, and the rear drafting area is the simple roller drafting area. In spinning practice, the front drafting area is responsible for The main drafting ratio of the roving, and the drafting ratio of the post-drafting zone is relatively small. Although the drafting ratio of the roving in the post-drafting zone is small, it has a certain pre-drawing effect on the roving, and the roving has a twist, and the spinning principle of the roving makes the twist distribution on the roving poor, and the pre-drawing in the rear area can tension the roving, and under the action of the twist torque, the twist on the roving can be redistributed, which is conducive to improving the twist distribution of the roving. Therefore, directly canceling the rear drafting zone will reduce the drafting quality of the roving; in addition, the apron drafting zone is used as the main drafting zone, and the shape and compactness of the roving fed into the drafting zone will also affect the drafting quality. The slightly drafted roving in the rear area is tensioned, and fed into the drafting area of the apron in a tighter form can maintain the cohesion between the fibers. When the single fiber changes from a slow fiber to a fast fiber during the drafting process, it can be affected. The effective frictional cohesion of the slow-speed fiber has a significant effect on stabilizing the speed-changing point of the fiber. Combining with the above theory, the present invention cancels the rear drafting area, and adds two yarn guide pressure rods after the two-channel drafting area, so that the roving between the bell mouth and the holding point of the rear roller can be bypassed in a curved form. The front and rear two guide pressure rods, while the roving is held and advanced by the rear roller, the tension of the roving will cause the roving to produce radial force on the front and rear two guide pressure rods, and the radial force will in turn Increase the friction between the roving and the guide pressure rod, so that the roving between the holding point of the back roller and the guide pressure rod can obtain a larger tension, and play a role in tensioning the roving, so as to realize the twist redistribution of the roving and The structure of the rovings fed into the drafting zone is compact, thereby ensuring the drafting quality of the rovings in the single drafting zone in the equidistant double-channel ring spinning device of the present invention.

The dual-channel rear roller includes a rear roller shaft, a looper gear ring, a bearing, a fixed gear ring and a metal key, the rear roller shaft fixes the radially limited fixed gear ring through the metal key, and the looper gear ring passes through the bearing looper. On the rear roller shaft, there is a transmission gear on one side of the looper gear ring, and the diameter of the working surface of the fixed gear ring is the same as that of the looper gear ring. A row of fixed gear rings and a row of looper gear rings form a working unit. The fixed gear ring Driven directly by the rear roller shaft, the looper ring is connected to the synchronous belt by the transmission gear, and then the synchronous belt is driven by an independent transmission shaft, which realizes the independent control of the speed of two adjacent gear ring working surfaces in one working unit , the left and right positions of the multiple looper gear rings on the single-section double-channel rear roller are consistent with the left and right positions of the fixed gear ring to ensure the consistency of the left and right channels. The two sides of the single-section double-channel rear roller are threaded guide posts and threaded guide holes. The structure is convenient for the axial connection transmission of the multi-section roller, and the roller shaft is fixed on the roller seat through the roller bearing.

The double-channel rear roller cooperates with the corresponding dual-channel rear upper rubber roller. The dual-channel rear upper rubber roller includes two rows of rubber roller sleeves A and rubber roller sleeves B with independent rotation degrees of freedom. The two rows of rubber roller sleeves are fixed on the On the cot shaft, interference fit is adopted, the outer diameters of cot A and cot B are the same, and the two rows of cots are in contact with the fixed gear ring and the loose gear ring of the double-channel rear roller respectively, through the double-channel The rear roller is driven to realize passive rotation, and the surface linear speed of the two rows of rubber roller sleeves matches the surface linear speed of the fixed gear ring and the looper gear ring of the double-channel rear roller.

The dual-channel rear roller and the dual-channel rear upper rubber roller form two holding jaws with independent rotational degrees of freedom. The two holding jaws form a drafting zone with the front roller respectively, and the dual-channel rear roller and the double-channel The channel lower pins wear two equal-length lower aprons at the same time, the lower aprons are lower apron A and lower apron B respectively, and the double-channel rear upper rubber roller and the dual-channel upper pin wear two equal-length upper aprons at the same time. The upper aprons are respectively the upper apron A and the upper apron B, forming two equidistant apron drafting areas with independent draft multiples.

The double-channel upper pin has a symmetrical structure on the center line, forming two left and right working units, taking the left working unit as an example:

The upper pin elastic nipper B and the upper pin elastic nipper A are sequentially fixed on the left side of the main body bracket of the upper pin, and the left limiter of the apron and the right limiter of the apron are respectively fixed on the upper pin elastic nipper A and the upper pin elastic nipper B Above, there is a circular protruding spacer fixing buckle in the middle of the front part of the upper pin main body bracket.

The double-channel lower pin has a centerline symmetrical structure, taking the left working unit as an example: it includes the lower pin channel A and the lower pin channel B, and there is a spacer between the lower pin channel A and the lower pin channel B;

The double-channel upper pin and the double-channel lower pin respectively limit the horizontal position of the upper and lower sets of left and right aprons, so that the left and right aprons can maintain a stable lateral position during operation, ensuring that the roving is pulled Stretch out.

The dual-channel negative pressure accumulation groove on the compact spinning negative pressure tube is Y-shaped, and the two bundles of fibers output by the jaws of the front roller enter the front end of the Y-shaped negative pressure accumulation groove respectively. The trough runs and gathers a single fiber bundle in the bottom area of the Y-shaped negative pressure trough, which is output by the gripping output roller and the output rubber roller of the condensing spinning, and then twisted into yarn.

Above the dual-channel negative pressure accumulation groove, there is an accumulation spinning negative pressure airflow guide piece, the top of which is closed, and there are open channels with a height of 1-2 mm and a width of 6-8 mm on the left and right sides, and the front and rear ends are fiber strands passing through. position, the transverse width of the fiber sliver inlet near the front roller is larger, and the transverse width of the fiber sliver outlet near the compact spinning output roller is smaller. The pressure is sufficient to meet the horizontal convergence of two fiber strands with relatively large spacing, so as to realize the smooth progress of the spinning process.

Beneficial effects of the present invention:

In the present invention, by designing double-channel rear rollers, dual-channel rear upper rubber rollers, dual-channel upper pins, and dual-channel lower pins, configuring double-guiding pressure rods and a modified compact spinning device, and cooperating with an electronic control system, two equal-spaced rollers are obtained. Independent single drafting zone with single pitch to realize independent drafting and online variable drafting of double rovings. Optimize the method of spinning two-component color-changing yarn on the ring spinning frame, and realize the design of the spinning device with all spindles. Under the condition of transforming the drive of the original middle and rear rollers into electronic servo control, the two-channel rear rollers and looper gear drive shafts can be borrowed from the positions of the middle rollers and rear rollers of the traditional compact spinning frame, and there is no need to modify the original spinning The roller seat of the drafting device of the machine can be replaced. The original middle roller can be replaced by a double-channel rear roller, and the original rear roller can be replaced by a looper ring drive shaft, and the double-channel lower pin, double-channel rear upper rubber roller and double-channel rear roller can be replaced. Channel lower pins, upper and lower aprons, etc. The output of two rovings can be changed by adjusting the draft ratio of the two drafting channels online, and the two-component color-changing yarn can be spun. Flexible and changeable, strong applicability.

Description of drawings

Fig. 1 is a schematic diagram of an equidistant double-channel ring spinning device in a single drafting zone;

Fig. 2 is a schematic cross-sectional view of the drafting mechanism;

Fig. 3 is the top view of the upper part of the drafting mechanism;

Fig. 4 is the top view of the lower half of the drafting mechanism;

Fig. 5 is a dual-channel rear roller;

Figure 6 is the upper rubber roller after the double channel;

Figure 7 is a double-channel upper pin;

Figure 8 is a dual-channel lower pin;

Fig. 9 is an airflow guide piece;

Figure 10 is a two-color gradient yarn weft knitted fabric;

Figure 11 is a two-color jump yarn weft knitted fabric.

In the figure: 1 roving A; 2 roving B; 3 bell mouth A; 4 bell mouth B; Rear upper rubber roller; 10 double-channel upper pin; 11 double-channel lower pin; 12 front roller; 13 front upper rubber roller; 14 compact spinning negative pressure tube; 15 compact spinning negative pressure airflow guide piece; Compact spinning output rubber roller; 18 spun yarn; 19 guide hook; 20 steel traveler; 21 steel ring; 22 bobbin; 23 lower apron A; 24 lower apron B; 25 upper apron A; Belt; 28 drive shaft; 29 synchronous pulley; 30 grid ring; 31 double-channel negative pressure accumulation groove; 81 rear roller shaft; 82 looper gear ring; 83 fixed gear ring; ;86 metal key; 87 thread guide column; 88 thread guide hole; 89 roller bearing; 91 rubber roller cover A; 92 rubber roller cover B; 93 rubber roller shaft; 94 rubber roller bearing; Upper pin elastic nipper B; 103 distance block fixed buckle; 104 upper pin pressure spring; 105 apron left limit; 106 apron right limit; 107 upper pin main body bracket; B; 113 limit spacer; 151 fiber strip entrance foot; 152 fiber strip exit foot.

Detailed ways

The present invention will be further described below in combination with specific embodiments. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Example 1:

A ring spinning device with equal intervals and double channels in a single drafting zone, comprising double bell mouths, compact spinning output rollers 16, compact spinning output rubber rollers 17, yarn guide hooks 19, steel rings 21 and travelers 20; The above-mentioned double bell mouth is fixed on the top of the bell mouth fixed cross bar 5, and the front yarn guide pressure bar 7 and the rear yarn guide pressure bar 6 are fixed by one end of the upper pin 10 of the double channel, and are positioned at the rear of the double bell mouth, and the double channel rear roller 8 and The double-channel rear top rubber roller 9 constitutes the drafting channel and is located at the rear ends of the front yarn guide pressure bar 7 and the rear yarn guide pressure bar 6, and the front roller 12 and the front top rubber roller 13 constitute the drafting channel, which is located at the dual-channel rear roller 8 and the double-channel Behind the rear top rubber roller 9; the compact spinning output roller 16 and the compact spinning output rubber roller 17 are located behind the front roller 12 and the front top rubber roller 13, to realize the gripping and output of the yarn, and then twist it into yarn, and pass the yarn guide Hook 19 and traveler 20 are wound onto tube 22 .

The roving A1 and the roving B are respectively fed into the holes of the double horns fixed on the cross bar, and then pass through the upper side of the rear yarn guide pressure bar 6 and the lower side of the front yarn guide pressure bar 7, and then feed the rear rollers respectively The two independent drafting channels pass through the drafting area and are drawn out at the nip of the front roller 12, and then enter the negative pressure airflow area of the compact spinning, and the two fiber bundles with relatively large distances shrink laterally under the action of the airflow and converge into single fiber bundles. Then it is held by the output roller 16 of the compact spinning and the rubber roller 17 of the compact spinning and outputted.

The purpose of the front yarn guide pressure bar 7 and the rear yarn guide pressure bar 6 is to pre-tension the roving fed into the drafting zone. The drafting device of the traditional ring spinning frame is divided into two drafting areas, the front drafting area is the main drafting area of the apron drafting area, and the rear drafting area is the simple roller drafting area. In spinning practice, the front drafting area is The drafting zone is responsible for the main drafting multiple of the roving, and the drafting multiple of the rear drafting zone is usually 1.1 to 1.3 times smaller. Although the drafting multiple of the roving in the rear drafting zone is smaller, it has a certain The roving has a twist, and the spinning principle of the roving makes the distribution of the twist on the roving poor, and the pre-drafting in the rear area can tension the roving, and the twist on the roving is heavy under the action of the twist torque. distribution, which is beneficial to improve the twist distribution of the roving, so the direct cancellation of the rear drafting zone will reduce the drafting quality of the roving; in addition, the apron drafting zone is used as the main drafting zone, and the shape and compactness of the roving fed into the drafting zone It also affects the drafting quality. The roving that has been slightly drafted in the rear area is tensioned, and it can be fed into the apron drafting area in a tighter form to maintain the synergy between the fibers. When the fast fiber changes to the fast fiber, it can be effectively frictioned and cooperated by the slow fiber, which has a significant effect on stabilizing the fiber speed change point. Combining the above theory, the present invention cancels the rear drafting zone, and at the same time, adds two guide pressure rods after the two-channel drafting zone, so that the roving between the bell mouth and the holding point of the rear roller can bypass the roving in a curved form. The front and rear two guide pressure rods, while the roving is held and moved forward by the rear roller, the tension of the roving will cause the roving to produce a radial force on the front and rear two guide pressure rods, and the radial force will in turn Increase the friction between the roving and the guide pressure rod, so that the roving between the holding point of the back roller and the guide pressure rod can obtain a larger tension, and play a tensioning role on the roving, so as to realize the twist redistribution of the roving and The structure of the rovings fed into the drafting zone is compact, thereby ensuring the drafting quality of the rovings in the single drafting zone in the equidistant double-channel ring spinning device of the present invention.

The dual-channel rear roller 8 is shown in Figure 5, the dual-channel rear roller 8 includes a rear roller shaft 81, a looper gear ring 82 and a metal key 86, and the rear roller shaft 81 is fixed by the metal key 86 to fix the radial limit. The gear ring 83 and the loose ring gear 82 are looped on the back roller shaft 81 through the bearing 86. The one side of the loose ring gear 82 has a transmission gear. A row of fixed gear rings 83 and a row of loose gear rings 82 form a working unit. The fixed gear rings 83 are directly driven by the rear roller shaft 81, and the loose gear rings 82 are connected to the timing belt 27 by transmission gears, and then synchronized by an independent transmission shaft. Belt 27 for transmission, which realizes the independent control of the rotational speed of two adjacent gear rings in a working unit, and the left and right positions of multiple loose gear rings 82 and fixed gear rings 83 on the single-section dual-channel rear roller 8 Consistent to ensure the consistency of the left and right channels, the two sides of the single-section double-channel rear roller 8 are respectively threaded guide posts 87 and threaded guide holes 88 structures, which are convenient for the axial connection and transmission of multi-section rollers, and the roller shafts are fixed on the Rolla sits.

The dual-channel rear roller 8 cooperates with the corresponding dual-channel rear upper rubber roller 9 as shown in Figure 6. The dual-channel rear upper rubber roller 9 includes two rows of rubber roller sleeves A91 and rubber roller sleeves B92 with independent rotational degrees of freedom. The rubber roller sleeves of the two rows are fixed on the rubber roller shaft 93 through the bearing 86, and both adopt interference fit. The outer diameters of the rubber roller sleeve A91 and the rubber roller sleeve B92 are the same. The ring 83 is in contact with the looper gear ring 82 and is driven by the dual-channel rear roller 8 to realize passive rotation. line speed matching.

The dual-channel rear roller 8 and the dual-channel rear upper rubber roller 9 form two gripping jaws with independent rotational degrees of freedom, and the two gripping jaws form a drafting zone with the front roller 12 respectively. The roller 8 and the double-channel lower pin 11 wear two equal-length lower aprons at the same time, the lower aprons are the lower apron A23 and the lower apron B24, and the double-channel rear roller 8 and the double-channel upper pin 10 simultaneously wear two Equal-length upper aprons, the upper aprons include the upper apron A25 and the upper apron B26, forming two equidistant apron drafting areas with independent draft multiples.

The double-channel upper pin 10 is shown in Figure 7. The double-channel upper pin 10 has a symmetrical structure on the center line, forming two left and right working units. Take the left working unit as an example:

The upper pin elastic nipper B102 and the upper pin elastic nipper A101 are sequentially fixed on the left side of the main body bracket 107 of the upper pin, and the left stop 105 of the apron and the right stop 106 of the apron are respectively fixed on the elastic nipper A101 of the upper pin and the elastic nipper A101 of the upper pin. Above the nipper B102, there is a distance block fixing buckle 103 with a circular protrusion in the middle of the front part of the upper pin body support 107.

The dual-channel lower pin 11 is shown in Figure 8. The dual-channel lower pin 11 has a centerline symmetrical structure. Taking the left working unit as an example: it includes the lower pin channel A111 and the lower pin channel B112, and the lower pin channel A111 and the lower pin channel There is a limit spacer 113 in the middle of the channel B112;

The double-channel upper pin 10 and the double-channel lower pin 11 respectively limit the horizontal position of the upper and lower groups of left and right aprons, so that the left and right aprons can maintain a stable lateral position during operation, ensuring Stability of roving draft.

The dual-channel negative pressure accumulation groove 31 on the said compact spinning negative pressure pipe 14 is Y-shaped, and the two bundles of fibers output by the jaws of the front roller 12 respectively enter the front end of the Y-shaped negative pressure accumulation groove, and under the action of the air flow, the fiber bundles Run along the gathering groove, gather into a single fiber bundle at the bottom end area of the Y-shaped negative pressure gathering groove, output through the holding of the output roller 16 and the output rubber roller of the compact spinning, and then twist into yarn.

The above-mentioned dual-channel negative pressure accumulation tank 31 is provided with an accumulation spinning negative pressure airflow guide piece 15, which is closed at the top, and there are open channels with a height of 1-2mm and a width of 6-8mm on the left and right sides, and the front and rear ends are fiber whiskers. At the position where the sliver passes, the transverse width of the fiber sliver entrance near the position of the front roller 12 is larger, and the transverse width of the fiber sliver exit near the position of the output roller 16 of the compact spinning is relatively small. The horizontal air flow velocity and pressure are high enough to meet the horizontal convergence of two fiber strands with a large distance, so as to realize the smooth progress of the spinning process.

Example 2:

Table 1 Spinning process of two-color gradient yarn

Both the white roving and the black roving have a linear density of 400tex, and the white roving and the black roving are fed according to the spinning process sequence in Table 1, and the 19.4tex two-color gradient yarn is spun, and the tex twist coefficient α _tex =360, and the spinning The spindle speed is 8000rpm, the diameter of the front roller is 27mm, the diameter of the double-channel rear roller is 27mm, and the distance between the front and rear rollers is 20mm.

The yarn is woven into a weft-knitted fabric on a 14G computerized flat knitting machine. The fabric weave is 1+1 rib, the number of needles is 262, and the average loop length is 0.56mm. Two-color gradient yarn weft-knitted fabric is shown in Figure 10.

Example 3:

The technical problem to be solved by the present invention is to provide a ring spinning device with equal intervals and double channels in a single drafting zone, in particular to a spinning method for ring spinning with two rovings independently drafted and spun into a color-changing yarn. The invention adopts the design of the rear roller and the rear top rubber roller with two coaxial independent rotation degrees, the dual-channel upper pin with the rear pressure bar, the dual-channel lower pin, the air flow guide sheet of the concentrated spinning and the negative pressure suction of the dual-channel compact spinning. Air ducts, forming two ring spinning devices with single drafting zone equidistant independent drafting channels. Realize the spinning of two-component color-changing yarn on the ring spinning frame, and realize the design of the device with the number of spindles, which can be retrofitted on the ordinary ring compact spinning frame at low cost and conveniently.

Table 2 Spinning process of two-color jump yarn

Both the white roving and the black roving have a linear density of 400tex, and the white roving and the black roving are periodically fed alternately according to the spinning process in Table 2, and 19.4tex two-color jump yarn is spun, and the tex twist coefficient α _tex = 360, spinning spindle speed 8000rpm, front roller diameter 27mm, double channel rear roller diameter 27mm, front and rear roller spacing 20mm.

The yarn is woven into a weft-knitted fabric on a 14G computerized flat knitting machine. The fabric weave is 1+1 rib, the number of needles is 262, and the average loop length is 0.56mm. Two-color jump yarn weft-knitted fabric is shown in Figure 11.

Claims (4)

1. An equidistant dual-channel ring spinning device with a single drafting zone, comprising double bell mouths, dual-channel rear rollers (8), dual-channel rear upper rubber rollers (9), front rollers (12), front Upper rubber roller (13), compact spinning negative pressure tube (14), compact spinning output roller (16), compact spinning output rubber roller (17), yarn guide hook (19), steel ring (21) and traveler (20 ); it is characterized in that the double bell mouth is fixed above the bell mouth fixed cross bar (5), and the front yarn guide pressure bar (7) and the rear yarn guide pressure bar (6) pass through one end of the upper pin (10) of the double channel Fixed, located behind the double bell mouth, the dual-channel rear rollers (8) and the dual-channel rear top rubber rollers (9) constitute the drafting channel and are located at the rear ends of the front yarn guide pressure bar (7) and the rear yarn guide pressure bar (6) , the front roller (12) and the front top rubber roller (13) constitute the drafting channel and are located behind the dual-channel rear roller (8) and the dual-channel rear top rubber roller (9); the compact spinning negative pressure tube (14) is located at the front roller At the rear of (12), the two bundles of fiber strands are gathered and merged; the output rollers (16) and the output rubber rollers (17) of the concentrated spinning are positioned at the rear of the negative pressure tube (14) to realize the holding and output of the yarn. Then it is twisted into yarn, and is wound on the bobbin (22) by the yarn guide hook (19) and the traveler (20); The roving A (1) and the roving B (2) are respectively fed into the holes of the double horns fixed on the cross bar, and then from the upper side of the rear yarn guide pressure bar (6) and the lower side of the front yarn guide pressure bar (7). and then fed into the two independent drafting passages of the rear rollers respectively, passed through the drafting zone and output at the nip of the front roller (12), and then entered the negative pressure airflow zone of the compact spinning, where the two fiber bundles with a relatively large distance Under the action of airflow, the fibers are laterally shrunk and converged into single fiber bundles, which are then held and output by the compact spinning output roller (16) and the compact spinning output rubber roller (17); Described double channel back roller (8) comprises back roller shaft (81), looper ring gear (82), bearing (85), fixed ring gear (83) and metal key (86), back roller shaft (81) The fixed gear ring (83) fixed radial limit by metal key (86), the loose ring gear (82) is looped on the rear roller shaft (81) through the bearing (85), and the loose gear ring (82) There is a transmission gear (84) on the side, the diameter of the working surface of the fixed gear ring (83) is the same as that of the loose gear ring (82), and a row of fixed gear rings (83) and a row of loose gear rings (82) form a working unit , the fixed gear ring (83) is directly driven by the rear roller shaft (81), the loose gear ring (82) is connected to the timing belt (27) by the transmission gear (84), and then the timing belt (27) is driven by an independent transmission shaft transmission, which realizes the independent control of the speed of two adjacent gear ring working surfaces in one working unit, and the multiple loose gear rings (82) and fixed gear rings (83) on the single-section dual-channel rear roller (8) The left and right positions of the rollers are consistent to ensure the consistency of the left and right channels. The two sides of the single-section double-channel rear roller (8) are respectively threaded guide posts (87) and threaded guide holes (88) to facilitate the axial connection of multi-section rollers Transmission, the roller shaft is fixed on the roller seat by the roller bearing (89); The dual-channel rear rollers (8) cooperate with the corresponding dual-channel rear upper rubber rollers (9), and the dual-channel rear upper rubber rollers (9) include two rows of rubber roller sleeves A (91) and rubber rollers with independent rotational degrees of freedom. Sleeve B (92), two rows of rubber roller sleeves are fixed on the rubber roller shaft (93) through bearings (94), both adopt interference fit, the outer diameter of rubber roller sleeve A (91) and rubber roller sleeve B (92) The same, the two rows of rubber roller sleeves are in contact with the fixed gear ring (83) and the loose gear ring (82) of the double-channel rear roller (8) respectively, and are driven by the dual-channel rear roller (8) to realize passive rotation. The surface linear speed of the roller cover is matched with the surface linear speed of the fixed gear ring (83) and the loose gear ring (82) of the double-channel rear roller (8); The dual-channel rear roller (8) and the dual-channel rear upper rubber roller (9) form two gripping jaws with independent rotational degrees of freedom, and the two gripping jaws form a traction with the front roller (12) respectively. In the extension area, the dual-channel rear roller (8) and the dual-channel lower pin (11) simultaneously wear two equal-length lower aprons, the lower aprons are respectively the lower apron A (23) and the lower apron B (24), The double-channel rear upper rubber roller (9) and the double-channel upper pin (10) wear two equal-length upper aprons at the same time, and the upper aprons include the upper apron A (25) and the upper apron B (26), forming two independent Equally spaced apron draft zones for draft multiples. 2. The equidistant double-channel ring spinning device of a single drafting zone as claimed in claim 1, characterized in that, said double-channel upper pin (10) is a center line symmetrical structure, forming two left and right sides. Take the left working unit as an example: the upper pin elastic nipper B (102) and upper pin elastic nipper A (101) are successively fixed on the left side of the upper pin main support (107), and the left limit of the apron ( 105) and the apron right limiter (106) are respectively fixed above the upper pin elastic nipper A (101) and the upper pin elastic nipper B (102), the middle position of the front part of the upper pin main body bracket (107) There is a distance block fixing buckle (103) with circular protrusions; The double-channel lower pin (11) is a centerline symmetrical structure, taking the left working unit as an example: it includes the lower pin channel A (111) and the lower pin channel B (112), the lower pin channel A (111) and the lower pin channel There is a limit spacer (113) in the middle of channel B (112); The double-channel upper pin (10) and the double-channel lower pin (11) respectively limit the horizontal position of the upper and lower sets of left and right aprons, so that the left and right aprons can maintain a stable position during operation. The transverse position ensures the stability of the roving draft. 3. the equidistant double-passage ring spinning device of a kind of single draft zone as claimed in claim 1 or 2, is characterized in that, also comprises the negative pressure tube (14) of compact spinning, the negative pressure tube (14) of compact spinning ( 14) The double-channel negative pressure accumulation groove (31) on the top is Y-shaped, and the two bundles of fibers output by the jaws of the front roller (12) respectively enter the front end of the Y-shaped negative pressure accumulation groove. Accumulation groove operation, gathers into single fiber bundle at the bottom end area of Y-shaped negative pressure accumulation groove, through the holding output of compact spinning output roller (16) and output cot, twisted into yarn then. 4. The equidistant dual-channel ring spinning device of a single drafting zone as claimed in claim 3, characterized in that, above the dual-channel negative pressure accumulation tank (31) is provided with a negative pressure for compact spinning The airflow guide (15) is closed at the top, and there are open channels with a height of 1-2mm and a width of 6-8mm on the left and right sides. The transverse width of the entrance is relatively large, and the transverse width of the exit of the fiber sliver near the output roller (16) of the compact spinning is relatively small. The horizontal convergence of two fiber strands with relatively large spacing realizes the smooth progress of the spinning process.

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