Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
  • D01H1/11—Spinning by false-twisting
  • D01H1/115—Spinning by false-twisting using pneumatic means
• • 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 component for an air jet spinning device, in particular a
• Spindle tip comprising a yarn withdrawal channel having an inlet opening for withdrawing a thread from a vortex chamber of the air jet spinning device.
• a component of this type is known from DE 103 33 411 A1 prior art.
• the component in which the inlet opening for removing a thread from the vortex chamber of the air jet spinning device is contained is referred to in DE 103 33 41 1 A1 as a spindle tip.
• the spindle tip is arranged on a spindle-like component which contains a continuation of the thread withdrawal channel.
• the spindle tip includes an injection channel for returning a thread end during a piecing process. For piecing the air jet spinning device after a yarn break a yarn end of a finished yarn is fed back against the withdrawal direction of the thread through the air jet spinning device and brought into the range of a drafting system.
• When returning the thread end of the injection channel is connected to a compressed air source. The air from the injection channel flows into the thread withdrawal channel and generates there an air flow against the withdrawal direction of the thread.
• the invention is based on the object, an improved component for a
• the component has at least one connected to the yarn withdrawal channel exhaust port for discharging air from the yarn withdrawal channel during a piecing process.
• the component according to the invention can be formed by an insertable into the air jet spinning device spindle-shaped component.
• the spindle tip is the component according to the present invention.
• Thread withdrawal channel flows, targeted to be discharged from the thread withdrawal channel.
• the exhaust opening advantageously opens into the vortex chamber or in an exhaust duct surrounding the spindle tip.
• An exhaust air opening has the advantage that not all of the air has to be removed from the yarn withdrawal channel through the inlet opening of the yarn withdrawal channel.
• the Beerverwirbelungen in the thread withdrawal channel can be reduced, so that the return of a thread end when piecing can be performed much more reliable. Confusion or snagging of the thread end in the thread withdrawal channel is avoided.
• the component includes an injection channel for returning a thread end against the withdrawal direction during a piecing process, wherein the connectable to a compressed air source injection channel is connected with an orifice to the thread withdrawal channel and is directed against the inlet opening of the thread withdrawal channel. It is advantageous that an exhaust air opening between the inlet opening of the yarn withdrawal channel and the mouth of the injection channel is connected to the thread withdrawal channel.
• the thread withdrawal channel seen in the withdrawal direction of the thread during the spinning process - a cross-sectional widening.
• Cross-sectional widening is advantageously arranged at a small distance-downstream of the thread-from the inlet opening of the thread withdrawal channel.
• the distance is preferably about 2 to 3 millimeters.
• Particularly advantageous is the cross-sectional widening disposed between the inlet opening of the thread withdrawal channel and the mouth of the injection channel.
• the distance from the inlet opening of the thread withdrawal channel to the mouth of the injection channel is advantageously less than 20 mm, and may in particular be in the range of 3 to 5 mm.
• At least one exhaust air opening is then arranged between two cross-sectional widenings.
• a series connection of several cross-sectional widenings and exhaust openings causes a particularly good
• an exhaust air opening extends substantially perpendicular to the yarn withdrawal channel.
• a perpendicular to the yarn withdrawal channel extending exhaust port can be very easily produced.
• FIG. 2 shows a further enlarged representation of a variant of a component according to the invention for an air jet spinning device.
• the air jet spinning device 1 shown in FIG. 1 is used to produce a spun yarn 2 from a staple fiber strand 3.
• the air jet spinning device 1 is preceded by a drafting device 4.
• the staple fiber staple 3 is fed in drafting 4 in the direction of delay A and withdrawn as spun yarn 2 in the yarn withdrawal direction B and forwarded to a winding device, not shown.
• the only partially shown drafting 4 is preferably a 4-cylinder drafting system and thus contains a total of four pairs of rollers, each one
• the air jet spinning device 1 is fed to the fiber ribbon 7 via a fiber feed channel 8. It follows a so-called vortex chamber 9, in which the fiber ribbon the
• Blowing compressed air through compressed air nozzles 11 which open tangentially into the vortex chamber 9 produces a rotating vortex flow.
• the compressed air is supplied in the air jet spinning device 1 during operation via a compressed air channel 12. From the compressed air channel 12, the compressed air passes first into a surrounding the vortex chamber 9 annular channel 13, to which said compressed-air nozzles 11 are connected directly.
• the emerging from the compressed air nozzles 1 1 compressed air is discharged through an exhaust duct 14.
• the exhaust duct 14 is arranged in an annular manner around a spindle-shaped component 15.
• the spindle-shaped component 15 contains the thread withdrawal channel 10.
• the spindle-shaped component 15 is stationary during operation.
• an edge of a fiber guide surface 16 is arranged as a swirl barrier, which is slightly eccentric to the yarn withdrawal channel 10 in the region of the latter
• Inlet opening 17 is arranged.
• the inlet opening 17 of the thread withdrawal channel 10 is arranged at a conically tapering end of the spindle-shaped component 15.
• the tapered end is referred to as a spinning tip or spindle tip 18.
• the fibers to be spun on the one hand in the air jet spinning device 1, the fibers to be spun on the one hand in
• the drafting unit 4 is first stopped and the supply of the staple fiber strand 3 is interrupted.
• the unwinding device not shown, is turned off. Before restarting the spinning process, it may be necessary to free the vortex chamber 9 of fiber residues hanging there.
• the spindle-shaped member 15 is for this purpose along the yarn withdrawal channel 10 in
• a main body 19 of the air jet spinning device 1 has a cylindrical receptacle 20, in which the spindle-shaped component 15 is movably inserted with a cylindrical sliding surface 21.
• the main body 20, two magnets 22 are arranged.
• the spindle-shaped component 15 has a bearing surface 23, which cooperates with the magnet 22, of a magnetic material.
• the magnets 22 hold the spindle-shaped component 15 in its operating position.
• the spindle-shaped component 15 can be moved counter to the magnetic force in the yarn withdrawal direction B along the cylindrical sliding surface 21. The movement of the
• Spindle-shaped member 15 may be manually by an operator or by a along the Air-powered spinning machine mobile maintenance cars done automatically. To move the spindle-shaped component 15, an indicated actuating element 24 may be provided. In the spindle-shaped component 15 an opening into the thread withdrawal channel 10 injection channel 29 is provided. Furthermore, a compressed air connection 30 is present on the spindle-shaped component 15, which can be acted on temporarily to supply the injection channel 29 with compressed air. The injection channel is needed during a piecing process. The injection channel 29 is connected to a mouth 28 to the thread withdrawal channel 10. The injection channel 29 is directed against the inlet opening 17 of the thread withdrawal channel, so that the compressed air flowing through the injection channel 29 in the thread withdrawal channel 10 generates a directed against the yarn withdrawal direction B air flow.
• the illustrated spindle-shaped component 15 preferably consists of at least two components.
• a first component of the spindle-shaped component 15 includes the cylindrical sliding surface 21, a part of the thread withdrawal channel 10 and the compressed air port 30.
• the spindle tip 18 is designed as a separate component and forms a second component of the spindle-shaped component 15.
• a third component of the spindle-shaped component 15 is a Steel ring 33 is provided, which contains the magnetic bearing surface 23.
• the spindle tip 18 includes a portion of the thread withdrawal channel 10, its inlet opening 17 and a portion of the injection channel 29 and its mouth 28.
• the spindle tip 18 is over
• the spindle tip 18 has on its outer contour a double cone, which has a small cone angle and subsequently a large cone angle in the region of the inlet opening 17 of the thread withdrawal channel 10.
• a wear-resistant insert 37 can be inserted into the spindle-shaped component 15.
• Anspinnvorganges exhaust openings 25 are provided.
• the exhaust openings 25 are connected between the inlet opening 17 of the thread withdrawal channel 10 and the mouth 28 of the injection channel 29 to the thread withdrawal channel 10.
• the exhaust openings 25 open into the swirl chamber 9 and in the exhaust duct 14.
• the exhaust ports 25 are advantageously as holes in
• the exhaust openings 25 run perpendicular to the yarn withdrawal channel 10. There are several exhaust ports 25 are arranged uniformly on the circumference of the yarn withdrawal channel. During a piecing process, the compressed air injected through the injection channel 29 can partially escape through the exhaust air openings 25 from the yarn withdrawal channel 10 for returning a yarn end. This is particularly advantageous when the thread withdrawal channel 10 - seen in the withdrawal direction B of the thread 2 - has a cross-sectional widening 26. The cross-sectional widening is arranged between the inlet opening 17 of the thread withdrawal channel 10 and the mouth 28 of the injection channel 29. The exhaust openings 25 are arranged between the cross-sectional widening 26 and the mouth 28.
• the exhaust air openings 25 cause a portion of the injected through the injection channel 29 air is discharged from the thread withdrawal channel 10 before reaching the cross-sectional widening 26. The remaining part of the air passing through the cross-sectional widening 26 and through the
• Inlet opening 17 flows, has only a few air turbulences, so that the thread end can be reliably fed back through the inlet opening 17. It is particularly advantageous if the thread end is returned by the yarn withdrawal channel 10 when returning against the withdrawal direction B at a defined speed.
• the speed of the thread end should advantageously be present at the latest when the thread end reaches the region of the mouth 28 and the cross-sectional widening 26. It may be advantageous that the return speed of the thread end is lowered when this range is reached. Returning the thread end through the area of
• Cross-sectional widening 26 preferably takes place at constant speed.
• Cross-sectional extensions 26 and 26 ' has. In this case, further exhaust openings 25 'between two cross-sectional extensions 26, 26' are arranged, as can be seen in the illustration of Figure 2.
• FIG. 2 shows only the area of the spindle tip 18 between the mouth 28 of FIG.

Landscapes

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

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=42989380

Family Applications (1)

Country Status (7)

Cited By (6)

Families Citing this family (9)

Citations (3)

Family Cites Families (14)

• 2009
  • 2009-07-17 DE DE102009034206A patent/DE102009034206A1/de not_active Withdrawn
• 2010
  • 2010-06-23 EP EP10731714A patent/EP2454402A1/de not_active Withdrawn
  • 2010-06-23 IN IN530DEN2012 patent/IN2012DN00530A/en unknown
  • 2010-06-23 CN CN2010800318620A patent/CN102471951A/zh active Pending
  • 2010-06-23 JP JP2012519906A patent/JP2012533691A/ja active Pending
  • 2010-06-23 US US13/383,911 patent/US20120192541A1/en not_active Abandoned
  • 2010-06-23 WO PCT/EP2010/003829 patent/WO2011006580A1/de active Application Filing

Patent Citations (3)

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