EP1629143B1 - Düsenkern für eine vorrichtung zur erzeugung von schlingengarn sowie verfahren zur herstellung eines düsenkernes - Google Patents

Düsenkern für eine vorrichtung zur erzeugung von schlingengarn sowie verfahren zur herstellung eines düsenkernes Download PDF

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Publication number
EP1629143B1
EP1629143B1 EP04724963A EP04724963A EP1629143B1 EP 1629143 B1 EP1629143 B1 EP 1629143B1 EP 04724963 A EP04724963 A EP 04724963A EP 04724963 A EP04724963 A EP 04724963A EP 1629143 B1 EP1629143 B1 EP 1629143B1
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EP
European Patent Office
Prior art keywords
nozzle core
yarn
nozzle
ceramic
core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04724963A
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German (de)
English (en)
French (fr)
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EP1629143A1 (de
Inventor
Gotthilf Bertsch
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Heberlein AG
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Oerlikon Heberlein Temco Wattwil AG
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/16—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/08—Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/16—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam
    • D02G1/161—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam yarn crimping air jets

Definitions

  • the invention relates to a method for producing a ceramic nozzle core as part of a Vosch for the production of loop yarn and a nozzle core for a device for the production of loop yarn.
  • the term “texturing” is partly understood to mean the refinement of spun filament bundles or the corresponding continuous yarns with the aim of giving the yarn a textile character.
  • the term “texturing” is understood to mean the production of a large number of loops on individual filaments or the production of loop yarn.
  • An older solution for texturing is in the EP 0 088 254 described.
  • the continuous filament yarn is fed to the yarn guide channel at the entrance end of a texturing nozzle and texturized at a trumpet-shaped exit end by the impact forces of a supersonic flow.
  • the yarn guide channel is cylindrical with a constant cross section. The entry is slightly rounded for easy insertion of the untreated yarn.
  • a guide body At the trumpet-shaped outlet end is a guide body, which takes place between the trumpet shape and the guide body looping.
  • the yarn is supplied to the texturing nozzle with a great deal of tradition.
  • the tradition is needed for loop formation on each individual filament, resulting in a titer increase at the exit end.
  • the EP 0 088 254 was based on a device for texturing at least one, consisting of a plurality of filaments continuous yarn.
  • the nozzle includes a Garn arrangementskanal and at least one in the radial direction in the channel opening feed for the pressure medium.
  • the generic nozzle had an outwardly flared outlet opening of the channel and a in the Outlet opening projecting, with the same an annular gap forming spherical or hemispherical guide body. It has been recognized that with textured yarns, maintaining yarn properties during and after the finishing process is an important criterion for the utility of such yarns. Further, the blending of two or more yarns and the individual filaments of the textured yarns is also essential for achieving a uniform appearance of the goods. Stability is used as a concept of quality.
  • the instability indicates what percentage of permanent strain is caused by the applied load.
  • EP 0 088 254 It was the object to provide an improved device of the type described, with which an optimal texturing effect can be achieved, which ensures a high stability of the yarn and a high degree of mixing of the individual filaments.
  • the optimum outer diameter of the convexly curved outlet opening of the channel should be at least equal to 4 times the diameter of the channel and at least 0.5 times the diameter of the spherical or hemispherical guide body ( 5).
  • odutechnischs Méen in a range of 100 to over 600 m / min. found.
  • the notifying party succeeded in successfully marketing appropriate nozzles over a period of more than 15 years.
  • the texturing quality is at least equal to or better than the texturing quality at lower production speed with a supersonic channel designed for the lower Mach range at a higher production speed.
  • the texturing process is at air velocities in the front of over Mach 2, so z.Bsp. Mach 2.5 to Mach 5, so intense that almost all snares are recorded and integrated into the yarn, even at highest yarn throughfeed speeds.
  • the generation of an air velocity in the high Mach Scheme within the acceleration channel causes the texturing to collapse up to the highest speeds no longer.
  • the whole filament composite is guided evenly and directly into the impact front zone within clear outer channel boundaries.
  • the yarn is pulled in by the accelerating air jet over the corresponding path, further opened and transferred to the directly subsequent texturing zone.
  • the blown air jet is then passed to the acceleration channel without deflection through a discontinuous and strongly expanding section.
  • One or more yarn threads with the same or different overfeed can be introduced and with a production speed of 400 to over 1200 m / min. textured.
  • the compressed air jet in the supersonic channel is accelerated to 2.0 to 6 Mach, preferably to 2.5 to 4 Mach. The best results are achieved when the exit end of the yarn channel is limited by a baffle.
  • the textured yarn is discharged approximately at right angles to the Garnkanalachse through a gap.
  • the total theoretically effective expansion angle of the supersonic channel should be from the smallest to the largest diameter above 10 °, but below 40 °, preferably within 15 ° to 30 °. According to the currently available roughness values, an upper limit angle (total angle) of 35 ° to 36 ° has resulted with respect to the production of sera.
  • a conical acceleration channel the compressed air is accelerated substantially steadily.
  • the nozzle channel section directly in front of the supersonic channel is preferably made approximately cylindrical, with the delivery component being blown into the cylindrical section in the direction of the acceleration channel.
  • the pull-in force on the yarn is increased with the length of the acceleration channel.
  • the nozzle extension or the increase of the Mach number gives the intensity of the texturing.
  • the acceleration channel should have at least a cross-sectional widening range of 1: 2.0, preferably 1: 2.5 or greater. It is further proposed that the length of the acceleration channel is 3 to 15 times, preferably 4 to 12 times larger than the diameter of the yarn channel at the beginning of the acceleration channel.
  • the acceleration channel can be designed to be continuously widened in whole or in part, have conical sections and / or have a slightly spherical shape. However, the acceleration channel can also be formed finely graduated and have different acceleration zones, with at least one zone with high acceleration and at least one zone with small acceleration of the compressed air jet. If the aforementioned boundary conditions were observed for the acceleration channel, then the said variations of the acceleration channel proved to be nearly equivalent or at least equivalent.
  • the yarn channel subsequently has a strongly convex yarn channel mouth, preferably a trumpet shape widened by more than 40 °, following the supersonic channel, the transition from the supersonic channel into the yarn channel mouth preferably being discontinuous.
  • a baffle especially the pressure conditions in the texturing can be positively influenced and kept stable.
  • a further preferred embodiment of the texturing nozzle is characterized in that it has a continuous yarn channel with a central cylindrical portion into which the air supply opens.
  • the new invention has now been based on the object, on the one hand to ensure all identified advantages of the nozzle cores described and on the other hand to develop new production processes, which allows a low-cost production of the nozzle cores.
  • the inventive method is characterized in that the ceramic nozzle core is formed with approximately constant wall thickness and reduced in size is made on the central functions of the Garn allianceskanals with air injection and yarn outlet for the loop formation and in the molding process.
  • a particularly advantageous embodiment is characterized in that the ceramic nozzle core is injected in a high-precision process.
  • the nozzle core according to the invention is characterized in that it is designed as a ceramic nozzle core with an approximately constant wall thickness and reduced in size to the central functions of the yarn treatment channel with air injection and yarn outlet for loop formation and can be produced in the molding process.
  • the new invention has freed itself from the literal compulsion to design the ceramic nozzle core as a removable core. Rather, the design is consistently aligned with the inner central functions.
  • the whole shape can now be determined according to casting requirements and e.g. be formed by a bipartite miniaturized ceramic nozzle core with outer nozzle ceramic jacket. Only the outer jacket, the dimensions of the nozzle cores of the prior art will be given, which also takes over the function of the removable core.
  • the new invention allows a number of particularly advantageous embodiments, for which reference is made to the claims 4 to 10.
  • a particularly advantageous embodiment is characterized in that the Garn advocacyskanal has at least one cylindrical portion and an extension portion, wherein the injection within the cylindrical portion, preferably approximately in the central region of the longitudinal side of the ceramic nozzle core, is arranged.
  • the extension section may be according to EP 0 088 254 be completely trumpet-shaped or according to EP 0 880 611 have a conical and a trumpet-shaped section.
  • the yarn channel has a central, preferably cylindrical portion, which is transferred in the transport direction without jumping in the conical enlargement, wherein the compressed air is injected with a sufficient distance to the conically expanded supersonic channel in the cylindrical portion.
  • the compressed air is blown over three circumferentially offset by 120 ° holes in the yarn channel. It is crucial in any case that the yarn opening intensified by blowing the compressed air into the yarn channel, but a knot formation is avoided in the yarn.
  • the opening of the yarn on the one hand and the texturing of the yarn on the other hand must be optimized for each. In order to optimize the two totally different functions, they have to be carried out spatially separated, but in quick succession, such that the opening follows immediately the texturing, or that the termination of the yarn opening process passes directly into the texturing. All central texturing functions for the production of a loop yarn can now be realized within a miniaturized ceramic nozzle core.
  • the new ceramic nozzle core may be part of a device which has a ball-shaped impact body which can be lowered into the extension section, wherein the trumpet-shaped section has a radius which is in relation to the diameter of the impact body.
  • the impact body having the trumpet-shaped portion an annular gap, wherein the outer diameter of the convexly curved outlet opening of the channel is at least equal to 4 times the diameter of the channel and at least equal to 0.5 times the diameter of the ball or hemispherical conductor body.
  • the nozzle core is formed in two parts and has an outer nozzle body, in which the ceramic nozzle core is used, wherein the outer nozzle body is made in plastic.
  • the outer plastic body now has the function of a removable body in the previous understanding with the required mounting dimensions and fasteners.
  • the plastic body also has a protective function for the ceramic nozzle core.
  • a clamping point is arranged between the outer nozzle body and the ceramic nozzle core for fastening the ceramic nozzle core in the outer nozzle body.
  • an annular compressed-air channel is arranged between the ceramic nozzle core and the nozzle body in the region of the cylindrical section, via which the air injection takes place by means of the injection bores.
  • the annular Compressed air channel has in each of the two end regions of the cylindrical portion a sealing point for sealing the compressed air.
  • the nozzle core is designed as a quick-change element within the device, so that it can be quickly installed and removed together with the ceramic nozzle core from the device.
  • the nozzle core can be formed in two parts, with an inner ceramic nozzle core and an outer nozzle body, both parts are a device with rotary drive and the nozzle body with the built-ceramic core is driven.
  • the ceramic nozzle core and the outer nozzle body in the assembled state at the Garnaustrittsende form an approximately flat surface.
  • shape and thickness variations should be compensated with the design of the nozzle body.
  • the structural requirements with regard to assembly and installation in a machine can be intercepted in this way via the outer nozzle body.
  • the ceramic nozzle core can be optimally designed with respect to the production of ceramic blanks.
  • the nozzle body is produced as a plastic injection-molded part and formed in the outer dimensions as a removable part with respect to corresponding solutions of the prior art.
  • the new invention is based on the type of texturing nozzles on the radial principle.
  • the blown air is guided in the radial direction of the supply point in a cylindrical portion of the yarn channel immediately in an axial direction at an approximately constant speed up to the acceleration channel.
  • EP 0 880 611 can be textured with the new solution one or more yarn threads with a variety of traditions.
  • the texturing 1 has a yarn channel 4 with a cylindrical portion 2, which also corresponds to the narrowest cross-section 3 with a diameter d at the same time. From the narrowest cross section 3 of the yarn channel 4 passes without jump in cross section in an acceleration channel 11 and is then expanded in a trumpet shape, the trumpet shape can be defined with a radius R. Due to the adjusting supersonic flow, a corresponding shock front diameter DA E can be determined. Due to the impact front diameter DA E , the detachment or tear-off point A 1 , A 2 , A 3 or A 4 can be determined relatively accurately. For the effect of the shock front is on the EP 0 880 611 directed.
  • the acceleration range of the air can also be defined by the length l 2 from the point of the narrowest cross-section 3 and the tear-off point A. Since it is a true supersonic flow, it can be calculated about the air velocity.
  • the FIG. 1 shows a conical configuration of the acceleration channel 11, which corresponds to the length l 2 .
  • the opening angle ⁇ 2 is given as 20 °.
  • the Ablössstelle A 2 is located at the end of the supersonic channel, where the yarn channel in a discontinuous, strongly conical or trumpet-shaped extension 12 merges with a ⁇ ffnunswinkel ⁇ > 40 °. Due to the geometry results in a shock front diameter D AE .
  • M B the center line of the injection bore 15 and M GK the Mlttelline the Garnkanales 4 and the intersection of M GK and M B denoted by SM.
  • Pd is the location of the narrowest cross section at the beginning of the acceleration channel 11
  • 11 is the distance from SM and Pd
  • l2 is the distance from Pd to the end of the acceleration channel (A4).
  • Löff denotes approximately the length of the yarn opening zone, Ltex approximately the length of the yarn texturing zone. The larger the angle ⁇ , the more the yarn opening zone is increased in the backward direction.
  • FIG. 2 shows a preferred embodiment of a whole nozzle core 5 in cross section.
  • the outer fitting shape is preferably adapted exactly to the nozzle cores of the prior art. This applies above all to the critical installation mass, the bore diameter B D , the total length L, the nozzle head height K H and the distance L A for the compressed air connections PP '.
  • the experiments have shown that an injection angle ⁇ greater than 48 ° is optimal.
  • the distance X of the respective compressed air holes 15 is critical with respect to the acceleration channel.
  • the nozzle core 5 has a yarn introduction cone 6 in the inlet region of the yarn, arrow 16.
  • the measure "X" ( FIG.
  • the compressed air bore 15 is preferably set back at least approximately by the size of the diameter d from the narrowest cross section 3.
  • the texturing 1 and the nozzle core 5 has a Garnein Technologykonus 6, a cylindrical central portion 7, a cone 8, which simultaneously corresponds to the acceleration channel 11, and an extended texturing 9.
  • the texturing becomes transverse to the flow bounded by a trumpet 12, which may also be designed as an open conical funnel.
  • the FIG. 2 shows in multiple enlargement compared to the actual size of a two-part nozzle core 5, consisting of a ceramic nozzle core 24 and an outer nozzle core jacket 25 with a baffle or impact body 10.
  • the new nozzle core 5 can be designed as a replacement core for a nozzle core of the prior art.
  • the dimensions B d , E L as installation length, L A + K H and K H are therefore preferably not only the same, but also produced with the same tolerances.
  • the trumpet shape in the outer exit region is preferably also produced in the same way as in the prior art, with a corresponding radius R.
  • the impact body 10 can have any shape: spherical, spherical, flat or even in the form of a dome.
  • the exact position of the impact body in the exit region is maintained by maintaining the outer mass, corresponding to a same take-off gap S p1 .
  • the texturing 18 is limited backwards through the acceleration channel 11.
  • the texturing space can also be enlarged into the acceleration channel, depending on the height of the selected air pressure.
  • the conical cylindrical wall surface 17 as well as the wall surface 19 in the region of the acceleration channel further has the discharge point of the compressed air holes 15 in the yarn channel highest quality.
  • FIG. 3 shows a whole nozzle head 21 with a two-part nozzle core 5 and a baffle 10 which is anchored via an arm 22 adjustable in a known housing 20.
  • the compressed air is supplied from a housing chamber 27 via the compressed-air bores 15.
  • the nozzle core 5 is clamped to the housing 20 via a clamping strap 26.
  • the impact body may also have a dome shape.
  • the Figures 4a, 4b and 4c show a solution of the prior art accordingly EP 0 088 254 with a long yarn guide channel 29 through which the yarn 30 to be textured passes.
  • the Garn Entryskanal 29 is supplied by a radial compressed air bore 15 with compressed air.
  • the injection hole 15 closes with the axis of Garn exitskanales 29 an angle ⁇ of about 48 °.
  • the diameter of the injection hole 15 is 1.1 mm.
  • the yarn guide channel 29 has a diameter d 1 of 1.5 mm and has an outwardly flared, convexly curved outlet opening.
  • the convex curvature has the form of a Circular arc with a radius R of 6.5 mm, to which the end face 34 of the texturing 1 forms a tangential plane, wherein the points of contact of the curvature arc with the tangent plane lie on a circle with the diameter D.
  • the yarn 30 * emerging from the nozzle is drawn off over the edge of the outlet opening.
  • a carrier 33 is attached to the nozzle-carrying housing 20 with an axis 32 around which an arm 22 fixedly connected to the baffle 10 is pivotable. By pivoting the arm 22, the annular gap 31 can be adjusted or the guide body can be lifted for threading.
  • the smooth yarn 30 is fed via a delivery mechanism 36 of the texturing 1 and withdrawn as a textured yarn 30 * via a delivery mechanism 37.
  • FIG. 5 shows bottom left purely schematically the texturing of the prior art according to EP 0 088 254 ,
  • two main parameters are highlighted: an opening zone Oe-Z 1 and a shock front diameter DAs, starting from a diameter d, corresponding to a nozzle, as in the EP 0 088 254 is described.
  • the upper right texturing according to EP 0 880 611 shown. It is clearly recognizable that the values Oe-Z 2 and D AE are larger.
  • the yarn opening zone Oe-Z 2 begins shortly before the acceleration channel in the region of the compressed air supply P and is already significantly larger with respect to the relatively short yarn opening zone Oe-Z 1 of the solution according to EP 0 088 254 ,
  • the increase in the Mach number is one of the most important parameters for the intensification of the texturing.
  • the enlargement of the injection angle is one the most important parameter for quality of texturing, as shown with the new nozzle as the third example in the upper left corner. As an example, the injection angle is given in the range of 50 ° to 60 °.
  • the yarn opening zone Oe-Z3 is larger than in the solution top right (according to EP 0 880 611 ) and significantly larger than in the solution bottom left (according to EP 0 088 254 ).
  • the other procedural process parameters are the same for all three solutions.
  • the surprisingly positive effect in the first section of the yarn opening zone such as OZ 1 and OZ 2 or as is marked in the corresponding circle.
  • the external difference lies only in the change of the injection angle.
  • the marked increase of the thread tension starts at an angle of more than 48 ° and can only be understood with a combinatorial effect.
  • 48 ° Einblaswinkel means a threshold, especially in texturing according to EP 0 880 611 , This texture nozzle type has a sufficient power reserve, so that even a slight intensification of the yarn opening is converted into an increase in yarn quality.
  • the textured yarn runs after the second delivery plant via a quality sensor, z.Bsp. with the market name HemaQuality, called ATQ, in which the tensile force of the yarn is measured 30 * (in cN) and the deviation of the instantaneous tensile force (sigma%).
  • ATQ HemaQuality
  • the measuring signals are fed to a computer unit.
  • the appropriate quality measurement is a prerequisite for the optimal monitoring of production.
  • the values are also an indicator of yarn quality.
  • the quality determination is made more difficult in that there is no defined loop size. It is much easier to determine the deviation from the quality that the customer finds to be good.
  • the yarn structure and its deviation can be detected, evaluated and displayed by a single characteristic, the AT value, via a yarn tension sensor.
  • a yarn tension sensor detects, in particular, the thread tension force after the texturing nozzle as an analogue electrical signal. From this, the AT value is continuously calculated from the mean value and the variance of the yarn tension measured values.
  • the size of the AT value depends on the structure of the yarn and is determined by the user according to his own quality requirements. If the thread tension or the variance (regularity) of the thread tension changes during production, the AT value also changes. Where the upper and lower limits are concerned, it can be determined with yarn mirrors, knit or fabric samples. They are different depending on the quality requirements.
  • the advantage of ATQ measurement that different disturbances from the process are detected simultaneously, eg. Uniformity of texturing, thread wetting, filament breaks, nozzle contamination, impact ball distance, hot pin temperature, air pressure differences, POY insertion zone, yarn pattern, etc.
  • FIG. 6a is based on the solutions according to the FIGS. 4a to 4c
  • FIG. 6b starts from the solution according to FIGS. 1, 2 and 3 out.
  • the corresponding parts of the two figures are designated by the same reference numerals.
  • the two Figures 6a and 6b show, for example, the size proportions of the individual areas for the core functions.
  • FIG. 6a clearly shows that the cylindrical portion (cylinder A) is about twice as long as the extension portion (EA).
  • Three radial injection holes 15 are set back by a distance ö.A, the opening portion, opposite to the extension portion (EA), and are located in the central portion of the cylindrical portion, as indicated in accordance with the blowing portion (ins. A.).
  • the diameter D and the radius R are of great importance.
  • the cylindrical portion has a diameter Gd.
  • Another special feature of the solution according to FIG. 6a is the angle ⁇ , which has an angle of about 48 ° in the transport direction of the yarn according to arrow 16.
  • An insertion cone EK is only as long as required for threading, but is only very short.
  • the diameter Bd is dimmed in accordance with the prior art.
  • a comparison of FIGS. 4a and Fig. 6a clearly shows that the cylindrical section (cylinder A) of the new solution is less than half as long, relative to the solution of the prior art FIG. 4a , This is an important feature in the concrete embodiment of a ceramic nozzle core according to the invention.
  • the length of Garn enclosureskanales is designed unnecessarily long.
  • the yarn guide channel GA was in the prior art according to the thickness dimension of the housing 20, as shown in FIG. 4b is clearly visible.
  • FIG. 6b shows against the FIG. 6a two special features.
  • the solution according to FIG. 6b has a first conical section (Kon A.) and a trumpet-shaped texturing section TA * instead of a trumpet-shaped section EA, corresponding to the solution of FIG EP-PS 0 880 611 ,
  • a comparison of Figures 6a and 6b shows that the cylindrical portion (cyl. A *) in the FIG. 6b is formed shortened, according to the specifications X1 and X2.
  • the opening section öA * at the FIG. 6b enlarged trained.
  • the conical section is preferably formed with an opening angle ⁇ of 12 ° to 40 °.
  • the second special feature lies in the arrangement of the radial injection bore 15, with an angle ⁇ of preferably 50 ° to 70 °, which increases the stability of the texturing to a very high level and allows best texturing qualities.
  • the FIG. 7 shows a further particularly advantageous embodiment, which of the EP-PS 1 022 366 emanates.
  • Practice shows that air-jet texturing nozzles for the production of loop yarn must be cleaned in relatively short time intervals.
  • the EP-PS 1 022 366 now proposes to set the nozzle core continuously or alternately in rotation. This made it possible to extend the cleaning interval massively.
  • the FIG. 7 shows how the new invention can be used in a rotating driven nozzle core. It is proposed to use a two-part nozzle core, approximately according to FIG. 2 ,
  • the FIG. 7 shows as an example the simultaneous joining and texturing of two yarns, a yarn A and a yarn B, which in each case via a yarn guide 40, respectively. 41 are guided in the yarn introduction cone 6.
  • the nozzle core consisting of a ceramic nozzle core 24 and an outer nozzle core jacket 25 is arranged in a rotatably mounted rotary sleeve 42 which is mounted in the drive housing 44 via ball bearings 43.
  • the compressed air is supplied via a compressed air chamber 45 and a compressed air connection 46, wherein a plurality of seals 47 prevents escape of compressed air.
  • a worm wheel 48 is held in the drive housing 44 via a collar 49 and a cover 50.
  • the drive takes place via a drive shaft 51, a Studentstriebsrad 52 and a worm wheel 48th
  • FIG. 8 shows in a 3D representation of a two-part nozzle core, according to the FIG. 6a and the Figures 3 and 7 ,
  • the FIG. 8 shows the assembly of a ceramic nozzle core 24 with an outer nozzle core shell 25.
  • the ceramic nozzle core 24, as in the FIG. 8 is indicated, are inserted into the nozzle core casing 24 by hand, with the last insertion movement a snap-like locking 60 of the ceramic nozzle core 24 is held exactly in position.
  • a flat surface 34 forms accordingly FIG. 2
  • a cylindrical compressed air chamber 61 is formed, which is closed to the outside by seals 62, so that the compressed air can flow only through the radial injection holes 15 in the yarn channel 4.
  • the example according to FIG. 8 shows very clearly another, very important feature of the new solution, namely the requirement of approximately constant wall thickness of the ceramic nozzle core 24, wherein at three points, WSt1, WSt2, WSt3 each with a dimension arrow, the wall thickness is displayed.
  • the outer nozzle core casing 25 with the dimension darts D1, D2, D3. Since the outer nozzle core can be made eg in plastic, even large variations in thickness have no harmful effect.
  • the inner ceramic nozzle core can be produced optimally in accordance with the requirements for the production of ceramic blanks by the pressing method, in particular by injection molding.
  • FIG. 9 illustrates on average the solution according to FIG. 6a and 8th .
  • FIG. 10 shows on average the FIGS. 6b and 8th ,
  • the ceramic nozzle core 24 is installed in the outer nozzle core casing 25.
  • the ceramic nozzle core 24 directly into a housing 20 approximately as FIG. 4b to be built in.
  • the housing 20 must have fitting openings corresponding to the miniaturized ceramic nozzle core 24.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Nozzles (AREA)
EP04724963A 2003-05-27 2004-04-01 Düsenkern für eine vorrichtung zur erzeugung von schlingengarn sowie verfahren zur herstellung eines düsenkernes Expired - Lifetime EP1629143B1 (de)

Applications Claiming Priority (2)

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CH9462003 2003-05-27
PCT/CH2004/000202 WO2004106605A1 (de) 2003-05-27 2004-04-01 Düsenkern für eine vorrichtung zur erzeugung von schlingengarn sowie verfahren zur herstellung eines düsenkernes

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EP1629143A1 EP1629143A1 (de) 2006-03-01
EP1629143B1 true EP1629143B1 (de) 2012-06-06

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US (1) US7752723B2 (zh)
EP (1) EP1629143B1 (zh)
JP (1) JP4372788B2 (zh)
KR (1) KR100746387B1 (zh)
CN (1) CN1795297B (zh)
BR (1) BRPI0408161B1 (zh)
RU (1) RU2316623C2 (zh)
TW (1) TWI317768B (zh)
WO (1) WO2004106605A1 (zh)

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BRPI0408161A (pt) 2006-03-21
RU2316623C2 (ru) 2008-02-10
US20070107410A1 (en) 2007-05-17
KR20060014427A (ko) 2006-02-15
CN1795297B (zh) 2013-03-27
RU2005140653A (ru) 2006-05-10
US7752723B2 (en) 2010-07-13
BRPI0408161B1 (pt) 2014-04-22
JP4372788B2 (ja) 2009-11-25
KR100746387B1 (ko) 2007-08-03
EP1629143A1 (de) 2006-03-01
WO2004106605A1 (de) 2004-12-09
JP2007501342A (ja) 2007-01-25
CN1795297A (zh) 2006-06-28
TW200516182A (en) 2005-05-16

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