Interlacing nozzle for the production of yarns with knots and method for interlacing yarns

Abstract

The invention relates to an interlacing nozzle (100) for the production of knotted yarns, interlaced yarn, of DTY or plain yarns with knots. The interlacing nozzle (100) comprises a yarn channel (1) with an air twist chamber (2). The air twist chamber (2) includes an injection port (4) for introducing air into the air twist chamber (2). A channel axis (M) extends in a yarn guiding direction (F). The yarn channel (1) comprises a channel width (21) transverse to the channel axis (M). The air twist chamber (2) comprises a chamber length (29) in the yarn guiding direction (F) and a chamber extension (28) transverse to this length. The chamber length (29) is at least 180% of the chamber extension (28), preferably at least 200% of the chamber extension (28), and preferably the chamber length (29) is at least 1.5 mm longer than the chamber extension (28).

1 - 17 . (canceled) 
     
     
         18 . An interlacing nozzle for the production of knotted yarns, interlaced yarn, DTY or plain yarns with knots, comprising a yarn channel with an air twist chamber, wherein
 the air twist chamber has an injection opening for introducing air into the air twist chamber,   a channel axis extends in a yarn guiding direction,   the yarn channel has a channel width transverse to the channel axis and   the air twist chamber has a chamber length in the yarn guiding direction and a chamber extension transverse to the chamber length, the chamber extension having a chamber extension length, and wherein   the chamber length is at least 180% of the chamber extension length.   
     
     
         19 . The interlacing nozzle according to  claim 18 , wherein the chamber extension length is 15%-45% of the channel width. 
     
     
         20 . The interlacing nozzle according to  claim 18 , wherein the chamber length is at most 350% of the channel width. 
     
     
         21 . The interlacing nozzle according to  claim 18 , wherein the air twist chamber comprises chamber walls which comprise at least one rounded wall segment. 
     
     
         22 . The interlacing nozzle according to  claim 21 , wherein the chamber walls comprise straight wall segments. 
     
     
         23 . The interlacing nozzle according to  claim 18 , wherein the chamber wall expands from a channel wall as viewed in the yarn guiding direction at an angle of no more than 5° with respect to the yarn guiding direction and the channel wall. 
     
     
         24 . The interlacing nozzle according to  claim 18 , wherein the air twist chamber comprises a first chamber region and a second chamber region, wherein the first chamber region is arranged first in yarn guiding direction and the second chamber region immediately follows the first chamber region in yarn guiding direction, wherein at the transition from the first chamber region to the second chamber region the chamber has a constriction so that the chamber expansion in the first and second chamber regions is greater than the chamber expansion at the transition. 
     
     
         25 . An interlacing nozzle for the production of knotted yarns, interlaced yarn, of DTY or plain yarns with knots comprising a yarn channel with an air twist chamber, wherein
 the air twist chamber has an injection opening for introducing air into the air twist chamber   and wherein a channel axis extends in a yarn guiding direction, wherein   the injection opening has a cross-section with at least one round section and at least one air guiding section, wherein the air guiding section is straight or has a radius of curvature which is at least 10 times larger than the radius of curvature of the round section.   
     
     
         26 . The interlacing nozzle according to  claim 25 , wherein the air guide section is arranged at an angle to the channel axis. 
     
     
         27 . The interlacing nozzle according to  claim 25 , wherein the injection opening comprises exactly four air guiding sections in cross-section, which are arranged in a substantially diamond shape, so that a first corner of the diamond shape points in yarn guiding direction and a second corner points in the opposite direction to the yarn guiding direction, and a third and a fourth corner are arranged pointing away in a common plane perpendicular to the first line of symmetry. 
     
     
         28 . The interlacing nozzle according to  claim 27 , wherein the corners of the diamond shape are rounded. 
     
     
         29 . The interlacing nozzle according to  claim 25 , wherein the injection opening comprises a cross-section with an opening length in yarn guiding direction and an opening width transverse to the opening length, wherein the opening length and the opening width are different. 
     
     
         30 . The interlacing nozzle according to  claim 27 , wherein the opening length is smaller than the opening width. 
     
     
         31 . The interlacing nozzle according to  claim 27 , wherein the opening width is smaller than the opening length. 
     
     
         32 . An interlacing nozzle for the production of knotted yarns, interlaced yarn, of DTY or plain yarns with knots comprising a yarn channel with an air twist chamber, wherein
 the air twist chamber has an injection opening for the introduction of air into the air twist chamber,   a channel axis extends in a yarn guiding direction and the yarn channel has a channel width transverse to the channel axis,   the air twist chamber has a chamber length in the yarn guiding direction and a chamber extension transverse to said length, wherein   the air twist chamber and/or the injection opening is designed and arranged in the yarn channel in such a way that air introduced through the injection opening is guided in a vector which, inside the air twist chamber, has more transverse components transverse to the channel axis than axial components along the channel axis and, outside the air twist chamber, has more axial components than transverse components.   
     
     
         33 . The interlacing nozzle according to  claim 32 , wherein the transverse components comprise more radial components than tangential components. 
     
     
         34 . The interlacing nozzle of  claim 32 , wherein the transverse components comprise more tangential components than radial components. 
     
     
         35 . A method for interlacing yarn, wherein the yarn is guided along a channel axis of a yarn channel of an interlacing nozzle and the introduced air is guided inside an air twist chamber in a vector, wherein the vector inside the air twist chamber comprises more transverse components transverse to the channel axis than axial components along the channel axis and outside the air twist chamber comprises more axial components than transverse components. 
     
     
         36 . The interlacing nozzle according to  claim 18 , wherein the chamber length is at least 1.5 mm longer than the chamber extension length. 
     
     
         37 . The interlacing nozzle according to  claim 18 , wherein the chamber extension length is at most 5 mm wider than the channel width. 
     
     
         38 . The interlacing nozzle according to  claim 21 , wherein the rounded wall segment has a radius between 0.3 mm and 6 mm. 
     
     
         39 . The interlacing nozzle according to  claim 25 , wherein the interlacing nozzle comprises a yarn channel with an air twist chamber, wherein
 the air twist chamber has an injection opening for introducing air into the air twist chamber,   a channel axis extends in a yarn guiding direction,   the yarn channel has a channel width transverse to the channel axis and   the air twist chamber has a chamber length in the yarn guiding direction and a chamber extension transverse to the chamber length, the chamber extension having a chamber extension length, and wherein   the chamber length is at least 180% of the chamber extension length.   
     
     
         40 . The interlacing nozzle according to  claim 32 , wherein the interlacing nozzle comprises a yarn channel with an air twist chamber, wherein
 the air twist chamber has an injection opening for introducing air into the air twist chamber,   a channel axis extends in a yarn guiding direction,   the yarn channel has a channel width transverse to the channel axis and   the air twist chamber has a chamber length in the yarn guiding direction and a chamber extension transverse to the chamber length, the chamber extension having a chamber extension length, and wherein   the chamber length is at least 180% of the chamber extension length.