Device and method for treating filament yarn and fancy knotted, migrated, and false-twist yarn

Abstract

The invention relates to a device for treating filament yarn by means of air nozzles comprising at least two injector/cover plates that can be clamped together, and at least one air supply channel. Said injector/cover plates form a yarn treatment chamber in the assembled state. According to the invention, the yarn treatment chamber is formed between the injector/cover plates that can be clamped together, in the longitudinal direction of the plates, and the air nozzle is embodied as an open nozzle comprising a threading slit and an individual air supply channel for the yarn channel in the injector/cover plates. The invention has two decisive advantages. The shape of the injector/cover plates is limited to the inherent core functions, namely a yarn channel formed in the plates, the threading slit, and the individual air supply channel for the yarn channel in the plate. The miniaturisation of the injector/cover plates significantly simplifies the production problems.

1 . Device for the treatment of filament yarn by means of a nozzle having a yarn channel which is developed as open and divided nozzle with threading slit and a channel to supply medium into the yarn channel, characterized in that the nozzle is formed by injector/cover plates which have a respective nozzle- and a respective cover plate side, can be assembled on an element that supplies medium, and forms a yarn channel between two adjacent injector/cover plates. 
   
   
       2 . Device in accordance with  claim 1 , characterized in that there are at least two plates with formed yarn channel profiles which form a yarn channel in assembled condition. 
   
   
       3 . Device in accordance with  claim 1 , characterized in that each plate has at least one cross hole for the supply of medium on the nozzle plate side for individual air injection into the yarn channel. 
   
   
       4 . Device in accordance with  claim 1 , characterized in that there are at least two plates, and each plate has a channel for the supply of medium, which can be activated individually through corresponding connection openings of the element for the supply of medium. 
   
   
       5 . Device in accordance with  claim 1 , characterized in that the injector/cover plates are formed as ceramic plates or have at least in the area of the yarn channel profile an appropriate highly ear-and-tear resistant surface area coating. 
   
   
       6 . Device in accordance with  claim 1 , characterized in that each of the at least two plates of a nozzle is formed identically at least with respect to the yarn channel profiles and each has a yarn channel profile on the nozzle plate side and the cover plate side, which form a yarn channel in assembled condition. 
   
   
       7 . Device in accordance with  claim 1 , characterized in that the injector/cover plates have in the threading area relative to the air delivery area a reduced thickness around the threading slit, and in the air supply area on both sides a planar sealing surface area. 
   
   
       8 . Device in accordance with  claim 1 , characterized in that the individual supply channel for the medium is guided approximately centered into the yarn channel and on both sides, perpendicular to the planar sealing surface area, at least two through openings are arranged for a precise positioning of the yarn channel profiles. 
   
   
       9 . Device in accordance with  claim 8 , characterized in that the through openings are not equal to safeguard against incorrect installation. 
   
   
       10 . Device in accordance with  claim 1 , characterized in that each of the plates has lateral adjusting notches, preferably in the area of the planar sealing surfaces, to tightly press all plates on the element for the supply of the medium. 
   
   
       11 . Device in accordance with  claim 1 , characterized in that it has two injector/cover plates and is developed as a single nozzle for a yarn path. 
   
   
       12 . Device in accordance with  claim 1 , characterized in that it is developed as dual- or multiple nozzle for two or more parallel yarn paths, with a respective additional injector/cover plate relative to the number of yarn paths. 
   
   
       13 . Device in accordance with  claim 3 , characterized in that the cross hole for the supply of the medium runs into the yarn channel approximately centered perpendicularly or with a slight conveyance effect and that the device is developed as a swirl nozzle. 
   
   
       14 . Device in accordance with  claim 13 , characterized in that the production of fine knotted yarn with a high regularity of the knots takes place in a continuous yarn treatment channel as well as a blast air supply channel, with the blast air supply channel being directed to the longitudinal center axis of the yarn treatment channel, and in the area of the orifice of the blast air supply channel, a blast air channel divergence is formed in the yarn treatment channel to form an air twist chamber for two opposite stationary twist flows. 
   
   
       15 . Device in accordance with  claim 3 , characterized in that the cross hole(s) for the supply of the medium run(s) tangentially into the yarn channel and the device is developed as detorque nozzle. 
   
   
       16 . Device in accordance with  claim 1 , characterized in that the plates are developed as flat plates which have on both sides planar sealing surface areas with two through holes in the area of the planar sealing surfaces, and that they can be slipped individually onto slide bars to a nozzle block by means of the through openings, that they can be precisely positioned relative to one another and vertically to the planar sealing surface areas, and that they can be clamped together into a nozzle block at the slide bars by means of screw connections. 
   
   
       17 . Device in accordance with  claim 16 , characterized in that the nozzle block has on both sides one each stable end plate to clamp the ceramic plates together. 
   
   
       18 . Device in accordance with  claim 1 , characterized in that the element for the supply of the medium has a support base on which each of the injector/cover plates of the nozzle block can be tightly fastened with adjusting notches, and that the support base or the stable end plates are color-coded. 
   
   
       19 . Device in accordance with  claim 16 , characterized in that the nozzle block can be fastened on a base for the supply of medium with integrated air supply channel to which the air supply channels to be activated can be connected. 
   
   
       20 . Device in accordance with  claim 16 , characterized in that it has a multiple nozzle with a corresponding number of plates and can be connected as a nozzle group and/or nozzle block to a nozzle holder which has a thread guide. 
   
   
       21 . Device in accordance with  claim 20 , characterized in that the clampable plates with two each end plates are fastened to the support base as a unit, with the thread guides being arranged in thread guide supports fastened at the nozzle holder and preferably being developed as a comb. 
   
   
       22 . Method for the treatment of filament yarn by means of a nozzle having a yarn channel, which is developed as a divided open nozzle with free threading slit and a channel for the supply of medium into the yarn channel, characterized in that for the treatment, the yarn is guided between two equal plates which together form a yarn channel, with the plates being sealed relative to one another and relative to the side of the supply of the medium. 
   
   
       23 . Method in accordance with  claim 22 , characterized in that for the treatment of two or a plurality of yarn paths, the number of plates corresponds to the number of yarn paths+1. 
   
   
       24 . Method in accordance with  claim 22 , characterized in that the plates are assembled into the nozzle block by slide bars and the nozzle block is braced on gaskets of an element for the supply of medium through cams. 
   
   
       25 . Method in accordance with  claim 22 , characterized in that to ensure a precise positioning of the ceramic plates relative to the yarn channel, the ceramic plates are guided on slide bars and assembled into a nozzle block, with the nozzle block being braced air-tight on a color-coded support base with common air injection. 
   
   
       26 . Method in accordance with  claim 22 , characterized in that for the supply of medium and in particular the injection of air into the yarn channel through a cross hole in a plate about longitudinally in the center of the yarn channel, crosswise or slightly sloped relative to the axis of the yarn channel, whereby the filament yarn is twisted or migrated. 
   
   
       27 . Method in accordance with  claim 22 , for the production of knotted yarn from smooth- and textured filament yarn in a continuous yarn channel of a swirl nozzle with a main boring directed centrally into the yarn channel axis for the primary air, as well as at least one auxiliary boring in a distance to the main boring for secondary air, with the primary air being delivered into the yarn channel between perpendicular and with only little conveying effect or little effect against the direction of yarn path, and the secondary air through at least one auxiliary boring, which is sloped toward the yarn channel axis and runs differently than the primary air, and supports the swirl flow. 
   
   
       28 . Method in accordance with  claim 22  for the production of fine knotted yarn with a high regularity of the knots by means of air nozzles with a yarn treatment channel as well as blast air, which is injected transversely to the yarn treatment channel, with the blast air in the direction of the yarn delivery as well as in opposite direction of the yarn delivery forming one each double swirl to generate the knots and the blast air being mixed in the entry area into the yarn treatment channel in two strong stationary twist flows undisturbed by filament bundles in an air twist chamber which is short in the longitudinal direction of the yarn channel. 
   
   
       29 . Method in accordance with  claim 22 , characterized in that the medium, in particular the air supply into the yarn channel, is guided tangentially through a cross hole into the yarn channel for the false-twisting of the filament yarn. 
   
   
       30 . Knots or migrated yarn in accordance with  claim 22 , characterized in that for the treatment, it is guided between two plates which together form a yarn channel, and that a knotted yarn or migrated yarn is generated. 
   
   
       31 . False-twisted yarn in accordance with  claim 29 , characterized in that for the treatment, it was guided and false-twisted between two equal plates which together form a yarn channel.