Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
  • D01H4/02—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by a fluid, e.g. air vortex

Definitions

• the invention relates to a method and device for spinning of yarn from staple fibers with air vortex, which finds application in textile industry and especially for obtaining of yarn.
• a method and device l ⁇ l for spinning of yarn from staple fibers which are delivered by couple of rollers, go through a special formed transporting chamber, which ends with a feeding needle, is twisted by a rotating vortex and is drafted through a opening of the immobile spindle of the twisting chamber as a continuous yarn.
• the main part of the fiber band receives a twist, and the other one which consists of loose ends of fibers, does not receive twists.
• the created loose ends of fibers are twisted strongly before entering the central entrance of the immobile spindle.
• the creating of loose ends of fibers is achieved with the limitation of the twists close to the zone of the feeding of the fiber band as for the purpose a spiral trajectory of the fiber band is ensured.
• the disadvantage of the method consists in this, that the twisting air vortex of the tangential grooves in the outlet chamber for twisting, creates strong centrifugal forces on the loose ends of fibers and the fibers which have left with their back end the zone of delivering come out of the yarn as waste.
• Another essential disadvantage is the joint movement in the inlet chamber of all fibers collected in band, which makes difficult the formation of more loose ends of fibers.
• This device is sensitive to the impurities located in the fiber band. These impurities violate the stability of the air vortex which worsens the quality of the yarn or they obstruct the small central opening of the spindle and cause interruption of the spinning process. The spinning speed is high, and the cleaning takes a lot of time.
• Task of the invention is to be created a method for spinning of yarn with air vortex from staple fibers, where the feeding fibers on the feeding perforated drafting cylinder are formed and move as two connected groups of core fibers and of wrapping fibers, which are twisted by two separate air vortexes, which rotate in opposite directions , which makes the method less sensitive to impurities and to be created high number of loose ends of fibers and their loose state to be preserved until their entering in the twisting chamber, where a strong structure of the yarn is formed during high spinning speed.
• the task is solved with method for spinning of yarn with air vortex of fiber band, which is delivered by couple of rollers, goes through a transporting chamber, is twisted by air vortex and is drafted through an opening of the twisting chamber as continuous yarn, as between the line of delivering of the fibers and the receiving opening for the yarn, the main part of the fiber band receives a twist, and the other one, which consists of loose ends of fibers, does not receive twists.
• the feeding fibers on the feeding perforated drafting cylinder are formed and move as two connected groups of core fibers and wrapping fibers, which are twisted by two separate air vortexes , which rotate in opposite directions, as after the line of drafting the fibers are fed to the inlet chamber, where the fibers go through different zones of congestion in such a way, that right from the entrance, the twisting of the core fibers by the twisting vortex of the twisting chamber is controlled, and the loose back ends of fibers are subjected to forces of stretching by the effect of the vacuum in the outlet cylinder, after which they are twisted around the forming yarn under the effect of the rotating of the air vortex in the twisting chamber.
• a process of spinning with twisting by only the twisting vortex of the main twisting chamber, without functioning of the twisting vortex of the additional twisting chamber can be realized.
• the trajectory and congestion of the core fibers and the wrapping fibers are controlled by the zones of vacuum on the feeding perforated drafting cylinder, and after the line of drafting the trajectory and congestion of the core fibers are controlled by the twisting forces of the twisting vortex, which is formed of two independent vortexes in the twisting chamber, and the loose ends of fibers are controlled by the forces of the vacuum of the outlet drafting cylinder, and are consolidated by the centrifugal forces of twisting of the twisting vortex of the twisting chamber.
• the trajectory and congestion of the core fibers and the forces of drafting and wrapping of the loose ends on the outlet drafting cylinder as well as the size of the twisting vortexes in the two spinning chambers can be changed, regardless of one another, and the inlet fiber band can be composed of different types of fibers.
• the device for realization of the method consists of transporting chamber for forming of loose ends of fibers, placed near drafting couple of rollers and twisting chamber, connected with tangential grooves for feeding of compressed air and central opening for taking out of the finished yarn.
• the surface of the outlet cylinder is perforated and under it in the diaphragm are formed zone for feeding of the core fibers, zone for feeding of the wrapping fibers and in the end joint zone for binding of the wrapping fibers to the core fibers and after the line of drafting a zone for drafting of the loose ends of fibers is formed, and the spinning chamber is composed of two twisting chambers, one main and one additional twisting chamber, as in the additional twisting chamber the inlet chamber is put in, after which the main twisting chamber is placed.
• a bush is mounted, in such a way that it forms with the body air spaces, and the chamber is with inlet opening with radius smaller than the radius of the outlet opening and in it tangential openings are drilled which are at different angles towards the axis of the chamber, as the first angle is smaller than the second one and in the spaces compressed air is fed through different openings.
• the diaphragm placed in the interior of the perforated drafting cylinder are formed sloping zone for congestion of the core fibers with small width, parallel zone for movement of the wrapping fibers and joint zone for binding of the two groups of fibers, which is formed to be narrowed up to exact width, which continues also after the line of drafting at an angle.
• the inlet chamber is moved on distance from the axis of feeding of the fiber band and is formed at an angle towards the central axis, ends with flat vertical section placed on axlistance from the inner surface of the inlet opening of the twisting chamber, which is smaller than the radius of the twisting chamber and on distance from the beginning of the twisting chamber.
• the advantages of the suggested method for spinning of yarn with air vortex from staple fibers according to the invention consist in this, that the movement of the feeding fibers on the feeding perforated drafting cylinder is controlled, as the movement is done in the beginning through two zones of congestion of the core fibers and of parallel movement of the wrapping fibers and subsequent binding of the two groups of fibers in one and after that they are fed to the spinning chambers, where they are twisted by two independent vortexes with different direction of rotating, the number of the loose ends of fibers increases and in result of which a strong structure of the yarn is formed during high spinning speed.
• the advantages of the device are, that on the surface of the perforated outlet cylinder are formed zone for control of the feeding of the core fibers, zone for feeding of the wrapping fibers and in the end a joint zone for binding of the wrapping fibers to the core fibers and following zone for drafting of the loose ends of fibers, and the spinning chambers are two in which tangential grooves are formed for forming of two independent vortexes in the main chamber and tangential grooves for 'forming of vortex in the second chamber for twisting in opposite direction of the wrapping fibers.
• Figure 1 is a principle scheme of the method
• the fiber band is delivered by couple of rollers, goes through transporting chamber, is twisted by air vortex and is pulled through an opening of the twisting chamber as continuous yarn, as between the line of delivering of the fibers and the receiving opening for the yarn, the main part of the fiber band receives a twist, and the other one which consists of loose ends of fibers does not receive twists.
• the feeding fibers 2 on the feeding perforated drafting cylinder 16 are formed and move as two joined groups of core fibers 3 and of wrapping fibers 4 which are twisted by two separate air vortexes 5 and 6, which rotate in opposite directions, as after the line of drafting 0-0 the fibers are fed to the inlet chamber 1, where the fibers go through different zones of congestion in such a way, that right from the entrance, the twisting of the core fibers 3 by the twisting vortex 5 of the twisting chamber 7 is controlled, and the loose back ends of fibers 4 are subjected to forces of stretching by the effect of the vacuum in the outlet cylinder 16, after which they are twisted around the forming yarn 8 under the effect of the rotation of the air vortex 6 in the twisting chamber 9.
• a process of spinning with twisting by only the twisting vortex 5 of the chamber 7, without functioning of the twisting vortex 6 of the twisting chamber 9 can be realized.
• the trajectory and congestion of the core fibers 3 and of the wrapping fibers 4 are controlled by the zones of the vacuum on the feeding perforated drafting cylinder 16, and after the line of drafting 0-0 the trajectory and congestion of the core fibers 3 are controlled by the twisting forces of the twisting vortex 5, which is formed of two independent vortexes 5' and 5" in the twisting chamber 7, and the loose ends of fibers 4 are controlled by the forces of the vacuum of the outlet drafting cylinder 16 and are congested by the centrifugal forces of twisting of the twisting vortex 6 of the twisting chamber 9.
• the trajectory and the congestion of the core fibers 3 and the forces of drafting and wrapping of the loose ends 4 on the outlet drafting cylinder 16 as well as the size of the twisting vortexes 5 and 6 in the two spinning chambers 7 and 9 can be changed regardless of one another, and the inlet fiber band 2 can be composed of different kinds of fibers.
• the device for realization of the method consists of transporting chamber for forming of loose ends of fibers, placed near drafting couple of rollers and twisting chamber, connected with tangential grooves for feeding of compressed air and central opening for taking out of the finished yarn.
• the surface of the outlet cylinder 16 is perforated and under it in the diaphragm 21 are formed zone c for feeding of the core fibers 3, zone d for feeding of the wrapping fibers 4 and in the end a joint zone b for binding of the wrapping fibers 4 to the core fibers 3 and after the line of drafting O-O zone b' is formed for drafting of the loose ends of fibers 4, and the spinning chamber is composed of two spinning chambers 7 and 9, as in spinning chamber 9 the inlet chamber 1 is put in, after which the spinning chamber 7 is placed.
• a bush 10 is mounted, in such a way that it forms with the body 7 air spaces 1 1 and 1 ⁇ , and the bush 10 is with inlet opening with radius r and outlet opening with bigger radius R and in it tangential openings 12 and 12' are drilled which are at different angles ⁇ and ⁇ ' towards the axis of the chamber 7, as the first angle is smaller than the second one, and in the air spaces 1 1 and 11 ' compressed air is fed through different openings 13 and 13'.
• sloping zone for congestion of the core fibers 3 with small width, parallel zone for movement of the wrapping fibers d and joint zone b for binding of the two groups of fibers, which is formed to be narrowed up to exact width b', which continues also after the line of drafting 0-0 at an angle ⁇ .
• the inlet chamber 1 is moved on distances a and b from the axis of feeding 0-0 of the fiber band 2 and is formed at an angle a towards the central axis o-o, ends with flat vertical section placed on a distance p from the inner surface of the inlet opening of the twisting chamber 7, which is smaller than the radius of the twisting chamber r and on distance x from the beginning of the twisting chamber 7.
• the device for spinning of yarn with air vortex from staple fibers acts the following way.
• the movement of the feeding fibers 2 on the feeding perforated drafting cylinder 16 is done in the beginning through two zones 21 of congestion of the core fibers 3 and of parallel movement of the wrapping fibers 4 and subsequent binding of the two groups of fibers in one and after that they are fed to the inlet chamber 1 , where they go through different zones of congestion in such a way, that right from the entrance, the twisting of the core fibers 3 by the twisting vortex 5 of the twisting chamber 7 is controlled, and the loose back ends of fibers 4 are subjected to forces of stretching by the effect of the vacuum in the outlet cylinder 16, after which they are subjected to forces of drafting and wrapping around the forming yarn 8 under the effect of the rotation of the air vortex 6 in the twisting chamber 9.
• the core fibers 3 are congested in the sloping zone for congestion with small width, and the wrapping fibers 4 move in parallel zone of the wrapping fibers d and are bound to the core fibers 3 in the joint zone b which is formed to be narrowed up to exact width b', and continues also after the line of drafting 0-0 with width b' and at an angle ⁇ .
• the trajectory and the force of congestion of the fiber band in the inlet chamber 1 can be changed.
• the inlet chamber 1 through the distances a and b and angle a is adjusted in such a way towards the axis of feeding 0-0 so that the core fibers 3 are congested at the entrance of the chamber 1 by the twisting vortex 5, and the flat vertical section at the exit of the chamber 1 is placed on distance p from the inner surface of the twisting chamber 5 , which is smaller than its radius r at the entrance, so that it congests the fibers 3, but to also let through enough twists for congestion of the fibers 3 up to the line 0-0.
• the radius r at the entrance of the twisting chamber 7 is smaller than the radius R at the exit with which the twisting chamber of the vortex 5 is formed, and through the openings 13 and 13' can be regulated the pressure of the air vortexes 5 and 5' and from here also the parameters of the vortex 5.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Spinning Or Twisting Of Yarns (AREA)
• Preliminary Treatment Of Fibers (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=49221714

Family Applications (1)

Country Status (3)

Cited By (3)

Citations (4)

• 2012
  • 2012-03-19 BG BG10111170A patent/BG111170A/bg unknown
  • 2012-12-14 WO PCT/BG2012/000032 patent/WO2013138875A1/en active Application Filing
  • 2012-12-14 IN IN1813MUN2014 patent/IN2014MN01813A/en unknown

Patent Citations (4)

Also Published As

Similar Documents

Legal Events