JP4092001B2 - Spinning machine, method for producing spun twisted yarn, and spun twisted yarn produced thereby - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a spinning machine, particularly a ring spinning machine, provided with a multistage draft unit, and a suction device provided with a porous region extending over the circumferential surface on the outlet roller pair of the multistage draft unit, The suction drum belongs, and this suction drum is arranged along a predetermined traveling section extending between a draft unit facing outlet roller and a twist lock facing roller that forms a twist lock gap together with the suction drum. Forming a guide surface for both strand parts of the fiber strands split there or two fiber strands fed side by side, already having the final draft, but still twisted It relates to a type in which no fiber strands form a converging stage that is condensed or bundled into a single tight fiber strand. Furthermore, the present invention relates to a method for producing a spun twisted yarn and a spun twisted yarn.
[0002]
[Prior art]
In a known spinning machine of this type (German Patent 19500036), each tight fiber strand formed on the suction drum is spun into individual single yarns after passing through the twist lock gap. It is. When it is desired to manufacture a twisted yarn, a plurality of yarns manufactured by this method are used as a single twisted yarn.
[0003]
Behind the exit roller of the draft unit consisting of a solid cylinder, two fiber slivers are bundled together into one, using a spindle and a hanging bell that can rotate almost freely, into a twisted fiber yarn Processing is also already known (EP-A-0444486). However, the properties of the fiber yarn produced by this method are not satisfactory.
[0004]
Furthermore, it is known to divide the fiber sliver into two sliver parts on the suction roller provided at the outlet of the multi-stage draft unit (Austrian Patent 398086). In this case, however, the two sliver parts continue to be bundled together before reaching the twist lock gap, so that the finally spun yarn is formed from a single fiber strand as in the prior art. Yes.
[0005]
[Problems to be solved by the invention]
It is therefore an object of the present invention to improve a spinning machine of the type mentioned at the outset, in particular a ring spinning machine and a method of the type mentioned at the outset, so that significantly improved spun yarns can be produced. It is to be.
[0006]
[Means for Solving the Problems]
The object of the present invention has been solved by the features described in claims 1 and 11.
[0007]
【The invention's effect】
The idea of the present invention is that not only two fiber strands supplied from, for example, a roving bobbin, but also two fiber strands that are compacted on a suction device, in particular a suction drum, especially behind the twist lock gap Together, they are twisted together in a twisted yarn form. In this case, a predetermined sufficient spinning twist is imparted to each close fiber strand.
[0008]
By tightening the fiber sliver, the strength of the sliver is significantly increased and the fuzz that hinders it is reduced. In this case, a small amount of twist is sufficient, which increases the production efficiency. In the weaving industry, such spun and twisted yarns can be used as warp yarns to avoid gluing. In the braiding industry, paraffin coating can be dispensed with.
[0009]
It is particularly advantageous if the distance from the twist lock gap to the junction of the two tight fiber strands is 5 to 15 mm, in particular about 10 mm. It is desirable that the side distance between the two close fiber strands in the twist lock gap is 5 to 10 mm, particularly 7 mm.
[0010]
After the twist lock gap, it is advantageous to provide a device for breaking the other tight fiber strand when one tight fiber strand breaks, as is known, for example, from the document EP 0 444 086 A1. It is.
[0011]
Further, the spinning machine according to the present invention or the method according to the present invention is advantageous in that cotton can be processed for the first time by the method of spun twist yarn.
[0012]
The spinning and twisting according to the present invention eliminates subsequent twisting, doubling, etc., and as a whole, remarkably economical production is guaranteed.
[0013]
Mechanically, the present invention can be implemented by equipping the creel with twice as many roving bobbins. In the case of an existing spinning machine, every other spindle can be omitted.
[0014]
Of particular importance in the present invention is that the two tight fiber strands are guided separately until they reach the twist lock gap, and only after passing through the twist lock gap in the direction of the spinning unit, these fiber strands twist into the twisted yarn. Is to be.
[0015]
Claim 16 also claims protection for the spinning yarns produced by the spinning machine according to the invention and the method according to the invention.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
In the following, embodiments of the present invention will be described in detail with reference to the drawings.
[0017]
As shown in FIGS. 1 and 2, two flyer slivers 11 are connected via a deflecting element 28 from two roving bobbins 12 arranged in a machine frame (not shown). They are introduced parallel to each other into a three-cylinder (three-bottom roller) draft unit 13 having a front draft zone 23 and a main draft zone 24 having 37, 37 ′. A pair of rollers 29, 29 'located at the end of the front draft zone 23 and at the start of the main draft zone 24 are provided with belts 30, 30' (shown only schematically) in a known manner. Reaches the retraction gap of the outlet roller pair 25, 26, that is, the tightening gap 14.
[0018]
The lower roller of the pair of outlet rollers is formed as a perforated suction drum 25 with a rotational axis 36 having a significantly larger diameter than the other rollers, said suction drum 25 facing the draft unit. Together with the outlet roller 26, the final clamping gap 14 of the draft unit 13 is formed.
[0019]
The fiber strand guided through the draft unit 13 is guided to the twist lock counter roller 27 around the part of the peripheral surface of the suction drum 25 along the curved traveling section 15 following the tightening gap 14. Is done. The twist lock opposing roller 27 forms a twist lock gap 16 for the fiber strand together with the suction drum 25.
[0020]
As shown in FIGS. 1 and 2, the perforated region 35 of the suction drum 25 extends over the entire circumference of the suction drum 25, but taking into account the traverse motion that may possibly be imparted to the fiber strands 22, 22 '. If so, it extends only over a sufficient axial width. This ensures that both fiber strands 22, 22 ′ are always in contact with the porous region 35 between the clamping gap 14 and the twist lock gap 16.
[0021]
Inside the suction drum 25, there is provided a shield 32 bent concentrically with the suction drum 25. The shield 32 is appropriately interrupted in the region of the traveling section 15, and the inner chamber of the shield 32 is provided. 1 is arranged so that an air flow from the radially outer side to the inner side is formed through the porous region 35 of the suction drum 25 in the direction indicated by the arrow 34 in FIG.
[0022]
Subsequent to the twist lock gap 16, the two tight fiber strands that have run from the twist lock gap 16 and are tightened to a width smaller than 1.5 mm are bundled and twisted to form a spun yarn 39. Is formed. The spun yarn 39 is continuously guided to a typical ring spinning unit 17. The ring spinning unit 17 is provided with a ring rail 18, a ring 19, a traveler 20, a spindle 21, and a spindle rail 38 common to all the spindles. The spindle 21 has two tight fibers. One spun twisted yarn twisted from the strand is supplied.
[0023]
The total draft in the draft unit 13 is preferably 80 to 100 times, in which case the draft in the front draft zone 23 is within the general range of 1.1 to 1.3 times. Not too much.
[0024]
As shown in FIG. 2, the through hole in the shield 32 defines two suction zones 33 and 33 ′ that are spaced apart in the axial direction, and these suction zones 33 and 33 ′ In general, they extend in the circumferential direction of the suction drum 25 or the fiber sliver transport direction 31 and converge with each other in the direction toward the ring spinning unit 17.
[0025]
In the case of the embodiment shown in FIG. 2, one end of the suction zones 33 and 33 ′ adjacent in the axial direction is between the suction drum 25 and the draft unit facing outlet roller 26 when viewed in the fiber sliver transport direction 31. Is located just behind the clamping gap 14 on the outlet side of the. At this location, the flyer sliver 11 enters the suction zones 33 and 33 '. In this region, the suction zones 33, 33 'have the largest axial spacing. Then, both suction zones 33, 33 'extend in a direction that converges mirror-symmetrically with respect to a central axis extending between the two suction zones in the circumferential direction, and in the circumferential direction of the suction drum at the end section. Slots of constant width or extending slightly parallel to each other are formed.
[0026]
In the case of the embodiment shown in FIG. 2, the convergence of the suction zones 33, 33 ′ starts from a peripheral surface location 42 (FIG. 2) that coincides with the clamping gap 14 of the suction drum 25, whereas FIG. In the case of the embodiment shown in FIG. 2, the corresponding peripheral surface portion 42 ′ is located at a clear circumferential interval from the tightening gap 14 when viewed in the fiber strand conveying direction 31. In the case of the embodiment shown in FIG. 3, this means that only one flyer sliver 11 is fed to the multistage draft unit 13, and after passing through the clamping gap 14, first from a single fiber strand, the suction zone This is necessary because two separate fiber strands 22, 22 'must be formed by spreading 33, 33' away from each other in a manner known per se. The formation of two separate fiber strands 22, 22 'is aided by a blast tube 40, which is also shown in FIG.
[0027]
Two separate fiber strands 22, 22 'are spaced apart from each other in a clear axial direction, and at least such that bridging between the fiber strands 22, 22' is at least sufficiently avoided. After being formed, both suction zones 33, 33 'start to converge with each other in the fiber strand transport direction 31, starting from the peripheral surface location 42', as in the embodiment of FIG. However, in this case, since the peripheral area available for convergence is short, the convergence angle must be increased or the overall convergence is reduced compared to the embodiment of FIG. However, it is also possible to increase the diameter of the suction drum 25 and thus the length of the travel section 15.
[0028]
Also in the case of the embodiment shown in FIG. 3, the two dense fiber strands formed on the suction drum 25 are bundled together after passing through the twist lock gap 16 and are spun and twisted yarn 39. Twisted.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing a first embodiment of the spinning machine of the present invention.
FIG. 2 is a schematic front view of the spinning machine of FIG. 1;
FIG. 3 is a schematic side view showing a second embodiment of the spinning machine of the present invention.
[Explanation of symbols]
11 Flyer Sliver, 12 Coarse Bobbin, 13 Draft Unit, 14 Tightening Gap, 15 Traveling Section, 16 Twist Lock Gap, 17 Ring Spinning Unit, 18 Ring Rail, 19 Ring, 20 Traveler, 21 Spindle, 22, 22 'Fiber Strand , 23 front draft zone, 24 main draft zone, 25 suction drum, 26 draft unit facing outlet roller, 27 twist lock facing roller, 28 turning element, 29, 29 'roller pair, 30, 30' belt, 31 fiber strand conveyance Direction, 32 shield, 33,33 ′ suction zone, 34 suction air, 35 porous region, 36 rotation axis, 37,37 ′ supply roller pair, 38 spindle rail, 39 spun yarn, 40 spray tube, 42,42 ′ Surface area

Claims (20)

There is provided at least one multi-stage draft unit (13) to which fiber strands are fed from one or two roving bobbins (12) or one or two sliver sliverkens, and a pair of outlet rollers of the multi-stage draft unit (25, 26) is provided with a close suction device (25) having a porous region (35) extending over the peripheral surface, and the suction device (25) is provided with a draft unit facing outlet roller ( 26) and the two sliver parts supplied in parallel with each other along the circumferential surface of the traveling section (15) located between the twist lock gap (16) A guide surface with a converging stage is formed, in which a sliding plane that already has a final draft but is only partially or not twisted. But it is adapted to be or focusing is fused to close the fiber strand (22, 22 '),
Along the traveling section (15) moved along with the fiber strands, it extends in the circumferential direction, with an axial spacing, just inside the porous region (35) of the densified suction device (25) in the radial direction And two densified suction zones (33, 33 ') defined in the shield (32) by the notches converging with each other towards the spinning unit,
Each of the suction zones is adapted to guide one fiber strand (22, 22 ') away from the other fiber strand (22, 22') by a lateral distance in the circumferential direction,
Both tight fiber strands (22, 22 ') are guided separately from each other in front of the twist lock gap (16) and only guided together after the twist lock gap (16) in the direction of the spinning unit (17). , characterized in that it is adapted to impart a twist spinning into one connected the two fiber strands simultaneously with twisted together to result in yarn-like spinning unit, a ring spinning machine.   2. The ring spinning machine according to claim 1, wherein the compaction suction device is a suction drum (25).   The ring spinning machine according to claim 1 or 2, wherein the spinning machine is a ring spinning machine, and the spinning unit is a ring spinning unit.   The travel section (15) extends between the counter draft unit outlet roller (26) and the twist lock counter roller (27) which forms a twist lock gap (16) together with the suction drum (25). 3. The ring spinning machine according to claim 2, wherein both fiber strands (22, 22 ') run out of the twist lock gap.   The multistage draft unit (13) is fed with two separate sliver or roving yarns (11) and the suction zone (33, 33 ') starts from the outlet clamping gap (14) of the multistage draft unit (13) and the fibers The ring spinning machine according to any one of claims 1 to 4, wherein the ring spinning machines are converged with each other in the sliver conveyance direction (31).   A single sliver (11) is fed to the multi-stage draft unit (13) and the suction zone (33, 33 ') is connected to two separate tight fiber strands (22, 22) after the outlet clamping gap (14). ′) Is first widened away from each other to form a fiber sliver conveying direction (31) from a peripheral surface location (42 ′) where two separate fiber strands (22, 22 ′) are provided. The ring spinning machine according to any one of claims 1 to 5, wherein the ring spinning machines are converged with each other.   A spray tube (40) placed in front of the peripheral surface location (42 ') as viewed in the fiber sliver transport direction (31) is to assist in the formation of two separate fiber slivers (22, 22'). The ring spinning machine according to claim 6, wherein   The suction zone (33, 33 ') is formed as a slit extending at least in the circumferential direction of the suction drum (25) and parallel to each other at its end region located in the fiber sliver transport direction (31). The ring spinning machine according to any one of items 1 to 7.   The suction zone (33, 33 ') is formed as a slot of constant width extending in the circumferential direction of the suction drum (25) and parallel to each other at its end section located in the fiber sliver transport direction (31). The ring spinning machine according to claim 8.   The ring spinning machine according to any one of claims 1 to 9, wherein the suction zone (33, 33 ') is narrowed like a hopper in the fiber sliver conveying direction (31) from the starting end.   Both suction zones (33, 33 ') narrow in a hopper shape in the fiber sliver conveying direction (31) from the start end until the slot-shaped end region starts, and both suction zones converge toward each other. The ring spinning machine according to claim 10.   The suction zone (33, 33 ') is formed mirror-symmetrically about an axis extending in the circumferential direction of the suction drum (25) extending between the suction zones. The ring spinning machine according to claim 1.   13. A ring spinning machine according to claim 1, wherein the sliver is compacted into tight fiber strands (22, 22 ') having a width smaller than 1.5 mm. There is provided at least one multi-stage draft unit (13) to which fiber strands are fed from one or two roving bobbins (12) or one or two sliver sliverkens, and a pair of outlet rollers of the multi-stage draft unit (25, 26) is provided with a close suction device (25) having a porous region (35) extending over the peripheral surface, and the suction device (25) is provided with a draft unit facing outlet roller ( 26) and the two sliver parts fed in parallel with each other, either along the running section (15) located between the twist lock gap (16), or the two sliver parts of the sliver divided here, A guide surface is formed which forms a converging stage, in which a sliver that already has a final draft but is only partially or not twisted is tight. It is adapted to be, or focusing is fused to the fiber strand (22, 22 '),
Along the traveling section (15) moved along with the fiber strands, it extends in the circumferential direction, with an axial spacing, just inside the porous region (35) of the densified suction device (25) in the radial direction And two densified suction zones (33, 33 ') defined in the shield (32) by the notches converging with each other towards the spinning unit,
Each of the suction zones guides one fiber strand (22, 22 ') circumferentially away from the other fiber strand (22, 22') by a lateral distance;
Both tight fiber strands (22, 22 ') are guided separately from each other in front of the twist lock gap (16) and only guided together after the twist lock gap (16) in the direction of the spinning unit (17). a method for producing spun twisted yarn in a ring spinning machine of the type adapted to impart twist spun simultaneously the two fiber strand when twisted together to result in yarn-like connected spinning unit (17).   15. A method according to claim 14, wherein a suction drum (25) is used as the compacting suction device.   The method according to claim 14 or 15, wherein the spinning machine is a ring spinning machine and the spinning unit is a ring spinning unit (17).   The travel section (15) extends between a draft unit counter exit roller (26) and a twist lock counter roller (27) forming a twist lock gap (16) with the suction drum (25). 15. The method according to 15.   16. Method according to claim 15, wherein the suction zones (33, 33 ') each have a lateral boundary partially deviating from the circumferential direction of the suction drum (25). 19. A method according to any one of claims 14 to 18 , wherein the sliver is compacted into tight fiber strands (22, 22 ') having a width of less than 1.5 mm. A spun yarn produced by the method according to any one of claims 14 to 19 by using the spinning machine according to any one of claims 1 to 14.

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