EP0539808B1 - Dispositif de frisage à boîte de bourrage pour filaments synthétiques - Google Patents

Dispositif de frisage à boîte de bourrage pour filaments synthétiques Download PDF

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Publication number
EP0539808B1
EP0539808B1 EP92117693A EP92117693A EP0539808B1 EP 0539808 B1 EP0539808 B1 EP 0539808B1 EP 92117693 A EP92117693 A EP 92117693A EP 92117693 A EP92117693 A EP 92117693A EP 0539808 B1 EP0539808 B1 EP 0539808B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
flow
duct
section
cross
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
EP92117693A
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German (de)
English (en)
Other versions
EP0539808A1 (fr
Inventor
Winfried Wübken
Klaus Burkhardt
Klaus Gerhards
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oerlikon Barmag AG
Original Assignee
Barmag AG
Barmag Barmer Maschinenfabrik AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Barmag AG, Barmag Barmer Maschinenfabrik AG filed Critical Barmag AG
Publication of EP0539808A1 publication Critical patent/EP0539808A1/fr
Application granted granted Critical
Publication of EP0539808B1 publication Critical patent/EP0539808B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes
    • D02G1/122—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes introducing the filaments in the stuffer box by means of a fluid jet

Definitions

  • the invention relates to an apparatus for upsetting synthetic filament threads according to the preamble of patent claim 1.
  • This device is known from EP-189099-B.
  • the flow channel downstream of a nozzle needle, in which the filament threads are guided together with the outflowing pressure medium, is formed with a cylindrical, in particular circular-cylindrical cross section and with a constant diameter over its length.
  • the known texturing nozzle has proven itself particularly in machines for carrying out a continuous spin-stretch texturing method and is used for the crimping of synthetic filament threads made of polyester, in particular polyethylene terephthalate, PA6, PA6.6 or PP at stretching speeds behind the spinning stage from 1800 to 3000 m / min applied industrially with great success. At this speed, however, a limit to the production speed is reached because the thread tension on the bundle of filaments conveyed by the nozzle decreases and any thread entanglement leads to a winder formation on the draw godets and to uncertainties in the production process.
  • the object of the invention is therefore the device for Compression crimp according to the preamble of claim 1 structurally to improve in such a way that the specified technical upper limit for a safe exercise of compression crimping is shifted further upwards according to the known, continuous spin-stretch texturing method and that at a further increased thread speed there is still sufficient tensile force is exerted by the nozzle on the running thread. It should be taken into account that the high quality already achieved with regard to thread crimping, consistency and dissolvability of the thread plug is maintained and the pressure medium consumption and pressure is as low and economical as possible.
  • the flow channel advantageously has a length of more than 30 and preferably more than 40 times the channel cross section at its narrowest point.
  • the advantage of a very small opening angle of the flow channel according to claim 4 is that with a very narrow flow channel cross section and the wall friction that is necessarily to be taken into account, the supersonic speed is maintained even with a large overall length of the flow channel without flow breaks. This means that it is possible to advantageously avoid the occurrence of a surge in the flow. The impulse and energy transfer to the filament threads takes place with a particularly high efficiency.
  • Claim 6 specifies a preferred embodiment of the flow channel.
  • Claim 7 specifies a further dimensioning rule, the result of which is a limited consumption of the pressure medium, which is particularly economical for the achievable thread speed.
  • the thread inlet channel of the high-speed nozzle is particularly advantageously formed in a nozzle needle according to claim 8. This has the advantage of a better and easier adjustment of the blowing channel to adjust the thread tension.
  • the advantage of the constructive design of the nozzle downstream of the flow channel according to claim 9 is that the nozzle is simple to set up and maintain, in particular it can be cleaned of thread remnants.
  • Another advantage lies in the annular slot flow formed between the truncated cone of the nozzle needle and the nozzle body, which has a radial component and which the filament threads after the thread inlet channel and the Blow duct tightly encloses on all sides.
  • a nozzle according to claim 10 in conjunction with claim 1 or 9 is formed in that the nozzle needle containing the thread inlet channel is sealingly inserted into the nozzle body by means of a sealing thread and possibly with the interposition of spacers (for example DE-U 80 22 113, DE-U 77 23 587).
  • spacers for example DE-U 80 22 113, DE-U 77 23 587.
  • the opening angle on the nozzle body and / or the cone of the nozzle needle according to claims 11 to 13 in conjunction with the axial adjustability of the nozzle needle according to claim 10 can be achieved that the narrowest point of the flow channel is axially displaced and the pressure conditions at the beginning of Flow channel can be adjusted so that the blowing nozzle sucks the filament threads at the inlet of the thread inlet channel, or that the blowing nozzle blows out small amounts of the pressure medium through the thread inlet channel.
  • the nozzle it is advantageously designed such that it can be switched over by the axial adjustment of the nozzle needle from the suction mode when the filament threads are put into an operating state with the nozzle easily blowing out pressure medium at the thread inlet channel.
  • the filament threads can simply be inserted into the blow nozzle, which is particularly necessary when starting up the texturing device and after a thread break on the stretching godets, after changing the spinneret, etc. and greatly reducing the handling times.
  • a compression crimping device is shown in longitudinal section, which essentially corresponds to the device known from EP-189099-B (Fig. 17 and Fig. 19). It consists of the nozzle body 1 with an insert body 3 containing the flow channel 2, as well as the inlet-side nozzle needle 4 and the stuffer box 5 flanged on the outlet side of the nozzle body 1 and take-off roller 6 for the thread plug 7 formed in the stuffer box 5 (FIG. 2).
  • the nozzle needle 4 contains the central thread inlet channel 8 and the pressure medium supply. It is screwed into the insert body 3 in an axially adjustable manner with a fine thread 9 and is sealed by cover 10 against pressure medium losses.
  • the pressure medium supply for example heated compressed air, water vapor, preferably superheated water vapor at a pressure of about 7 to 12 bar, takes place through distribution channel 11 in the nozzle body 1.
  • the distribution channel 11 with the blowing channels 15 is via axial channels 12, annular groove 13 in the cover 10 and radial bores 14 connected, which open at the downstream end of the nozzle needle 4 in the common flow channel 2 for the pressure medium and the filament threads.
  • the flow channel 2 consists of a first section 2.1, with the length L 1 which tapers in the flow direction up to a narrowest cross section 2.2 and then widens conically in a second section 2.3 with a length L 2, with a very small opening angle alpha (Fig. 4), which is preferably less than 2.0 °.
  • the stuffer box 5 is flanged to the nozzle body 1 with a flange 35 and screws 16. On the inlet side, it initially has a section with a conical channel widening 17 from the cross section of the flow channel 2 into the circular cylindrical or slightly conical cross section of the stuffer box 5.
  • the cone angle beta of the channel widening 17 is preferably approximately 10 °.
  • An area follows in the direction of flow, which is permeable in the radial direction so that the pressure medium can be separated from the filament threads in the stuffer box 5.
  • This area consists of closely arranged ribs 18 which are formed by the incisions 19 in the stuffer box wall 20 and which are so closely adjacent that parts of the thread plug 7 formed do not get caught on the ribs 18.
  • the outlet-side end of the stuffer box 5 is circular-cylindrical or slightly conical to form a thread plug 7 with a circular cross section.
  • a semicircular profiled, continuously adjustable take-off roller 6 which interacts with a second roller, not shown.
  • the device Over the entire length of the device, it has a threading slot 21 which can be opened and closed during operation by means (not shown here) for inserting the filament threads so that individual filaments are not blown out of the slot 21.
  • a threading slot 21 which can be opened and closed during operation by means (not shown here) for inserting the filament threads so that individual filaments are not blown out of the slot 21.
  • Fig. 2 shows a modified upsetting chamber in the open state.
  • the longitudinally divided nozzle needle 4 is fastened here to the nozzle body 1 by screws 36.
  • the pressure medium supplied through radial channel 22 on the nozzle body 1 in the direction of arrow 23 flows through a conical annular slot channel 24 into the flow channel 2 and there meets the filament threads fed through the thread inlet channel 8, which are compressed in the stuffer box 5 to the thread plug 7 and transported away by the take-off roller 6 and roller 6.1 become.
  • the crimping device shown is divided into two halves 1.1 and 1.2 for cleaning or threading the filament threads in the longitudinal direction and one half 1.2 is moved to close in the direction of arrow 25, centering cams 26 on one nozzle half 1.2 in associated center holes 27 of the other nozzle half 1.1 intervene and operate locking means, not shown.
  • a pressure chamber 28 with pressure medium in direction 30 By acting on a pressure chamber 28 with pressure medium in direction 30, the two nozzle halves 1.1, 1.2 are pressed together, sealed in the longitudinal direction and a radial outflow of the working medium is prevented.
  • Fig. 3 shows the cross section of the compression chamber in the area of the pressure medium supply 22 and the annular chamber 29, which opens into the annular slot channel 24 on the outer circumference of the nozzle needle 4.
  • the flow channel 2 in the insert body 3 of the nozzle body 1 of the stuffer box crimping device is shown enlarged.
  • a first section 2.1 it tapers in the form of a nozzle, to a point 2.2 at which the channel has its narrowest cross section and the flow reaches the speed of sound.
  • the nozzle needle 4 projects axially into the first section 2.1 inside. It is axially adjustable in the direction of arrow 34.
  • the filament threads are fed through the central channel 8 and the pressure medium is supplied through the conically tapering annular slot 24 formed between the nozzle needle 4 and insert body 3. Downstream of the narrowest point 2.2 there is an increase in the flow cross section of the flow channel 2 in section 2.3.
  • the size of the widening angle alpha is fundamentally also dependent on the quality of the mechanical processing of the channel wall and is produced with the poorer processing quality of the flow channel 2 with the larger cone angles alpha.
  • the length L2 of the flow channel section 2.3 is dimensioned depending on the diameter of the flow channel 2 at the point of the narrowest cross section 2.2.
  • the length of the section with the smaller opening angle is preferably more than 8 times as long as the length of the first section with the larger opening angle.
  • the last section of the flow channel is the channel widening 17 with a significantly larger cone angle beta, beta being approximately 5 to 15 °. This section is flowed through by subsonic flow after the occurrence of small compression surges.
  • the length L D of this section results from the diameter of the flow channel 2.3, at its end, the cone angle beta and the intended diameter of the stuffer box 5.
  • FIGS. 5 and 6 show the flow channel 2 in the region of the mouth of the axially adjustable nozzle needle 4.
  • the conical annular slot channel 24 is formed in the nozzle body 1 with a cone angle rho. It merges at point 31 into the section 2.1 of the flow channel 2 which tapers in the shape of a nozzle and which has the narrowest flow cross section at point 2.2.
  • the nozzle needle 4 is formed with a cone angle gamma which differs from the cone angle rho in the nozzle body 1 and is smaller than this. As a result, the nozzle needle 4 can be displaced axially into the flow channel by the length s beyond the point 31.
  • a narrowest cross section of the annular slot channel 24 can thus be placed in front of the downstream end of the nozzle needle 4 at the point 31. This influences whether and in what quantities pressure medium emerges upstream through the thread inlet channel 8 of the nozzle needle 4.
  • the nozzle needle 4 is designed in a modification of the situation in FIG. 5 in such a way that the surface is formed from two conical surfaces, the upstream one of which has an opening angle gamma and the downstream one of which Has opening angle epsilon.
  • the annular slot channel 24 and the pressure conditions in the annular slot channel 24 and in the thread inlet channel 8 can also be influenced such that the blowing nozzle does not blow backwards.

Claims (14)

  1. Dispositif de frisage à refoulement de fils continus synthétiques
    avec une tuyère alimentée par un milieu échauffé, à l'état gazeux ou à l'état de vapeur, et avec un bac à refoulememt (5) y lié,
    - les fils continus étant amenés par un canal d'entrée du fil (8)
    - et le milieu étant amené par au moins un canal de soufflage (15, 24) qui, lui, est réalisé, de préférence, en forme d'une fente annulaire (24) sur la surface latérale d'un cône de révolution droit,
    - les fils continus étant transportés ensuite, à travers d'un canal d'écoulement (2) dans lequel les fils continus sont conduits en même temps que le milieu,
    dans un bac à refoulement (5) beaucoup élargi dans la section transversale par rapport au canal d'écoulement (2),
    - le milieu étant ensuite évacué du bac à refoulement (5) par ces ouvertures d'écoulement radiales (19)
    - et les fils continus étant refoulés jusqu'à former un bouchon de fils (7) mobile dans le bac à refoulement (5),
    caractérisé en ce que
    - la section transversale du canal d'écoulement (2) décroit continuellement - vu dans la direction de l'écoulement - jusqu'à une section transversale des plus étroites (2.2), où l'on atteint la vitesse du son dans le milieu,
    pour accroître ensuite de façon continuelle jusqu'à arriver au bac à refoulement (5), de préférence avec un angle d'ouverture constant (alpha), ou pour accroître de façon discontinue dans au moins deux étapes.
  2. Dispositif selon la revendication 1,
    caractérisé en ce que
    - le canal d'écoulement (2) est lié avec le bac à refoulement (5) par un segment présentant un élargissement du canal (17) avec un angle de cône (bêta) de moins de 20°, le bac à refoulement (5) étant élargi, de préférence, de façon cylindrique ou de façon faiblement conique.
  3. Dispositf selon la revendication 1 ou 2,
    caractérisé en ce que
    - la longueur du canal d'écoulement (2) se monte à une quantité trente fois plus grande, de préférence à une quantité quarante fois plus grande, que le diamètre du canal d'écoulement (2) à la section transversale la plus étroite (2.2).
  4. Dispositif selon les revendications 1 à 3,
    caractérisé en ce que
    - l'angle d'ouverture (alpha) du canal d'écoulement (2.3), en aval de la section transversale la plus étroite du canal d'écoulement (2.2), fait moins de 3°, de préférence entre 1° et 2°.
  5. Dispositif selon au moins une des revendications 1 à 4,
    caractérisé en ce que
    - le canal d'écoulement (2.3) est - en aval de la section transversale la plus étroite (2.2) - élargi plus fort dans un premier état et moins fort dans un deuxième état, de manière à obtenir que la vitesse d'écoulement dans le premier état est accélérée de préférence à 1,4 mach et reste essentiellememt constante dans le deuxième état.
  6. Dispositif selon la revendication 5,
    caractérisé en ce que
    - le deuxième état est au moins cinq fois plus long, de préférence huit fois plus long, que le premier état.
  7. Dispositif selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que
    - le diamètre du canal d'écoulement (2) fait moins de 3 mm à l'endroit le plus étroit (2.2).
  8. Dispositif selon l'une quelconque des revendications 1 à 7,
    caractérisé en ce que
    - le canal d'entrée du fil (8), à l'extrémité d'amont, supérieure du corps de tuyère (1), est réalisé en forme d'un pointeau (4),
    - le canal de soufflage (15, 24) contourne en anneau le pointeau (4),
    - le canal de soufflage débouche, à l'extrémité d'aval, inférieure du pointeau (4), de façon coaxiale par rapport au canal d'entrée du fil (8).
  9. Dispositif selon l'une quelconque des revendications 1 à 8,
    caractérisé en ce que
    - le pointeau (4), à l'extrémité d'aval, inférieure du canal d'entrée du fil (8), est réalisé en forme d'un tronc de cône droit avec une pointe imaginaire en direction du circuit du fil, le tronc de cône pouvant être implanté dans un creux du corps de tuyère (1) de manière à l'étancher, tout en épargnant une fente annulaire (24) pour le milieu qui s'échappe.
  10. Dispositif selon la revendication 9,
    caractérisé en ce que
    - que le pointeau (4) dans le corps de tuyère (1) peut être ajusté axialement, dans le but de pouvoir modifier la fente annulaire (24).
  11. Dispositif selon les revendications 9 et 10,
    caractérisé en ce que
    - l'angle d'ouverture (rho) du creux en cône du corps de tuyère (1) est plus grand que l'angle d'ouverture (gamma) du pointeau (4).
  12. Dispositif selon les revendications 9 à 11,
    caractérisé en ce que
    - la surface latérale du tronc de cône du pointeau (4) consiste en deux surfaces coniques avec deux angles de cône différents (gamma, epsilon), le plus grand des deux angles de cône (epsilon) suivant le plus petit (gamma) des angles - vu en direction de l'écoulement.
  13. Dispositif selon la revendication 9,
    caractérisé en ce que
    - le canal d'écoulement (2.1) s'effilant jusqu'à la section transversale la plus étroite (2.2) est directement lié au creux du corps de tuyère (1) ayant, lui, une conicité différente par rapport au canal d'écoulement (2.1),
    - le pointeau (4) est inséré dans le creux du corps de tuyère (1) axialement de manière à obtenir que sort extrémité d'amont, supérieure s'enfonce axialement dans le canal d'écoulement (2) et
    - la section transversale la plus étroite d'écoulement se fait entre le pointeau (4) et le corps de tuyère (1) dans la région d'aval, inférieure de la fente annulaire.
  14. Dispositif selon l'une quelconque des revendicatios 1 à 13,
    caractérisé en ce que
    - le corps de tuyère (1), le pointeau (4), le cartel d'écoulement (2) et le bac à refoulement (5) sont divisés en longueur de manière à obtenir qu'on les peut, pour cela, ouvrir ou fermer pour étaler le fil.
EP92117693A 1991-10-26 1992-10-16 Dispositif de frisage à boîte de bourrage pour filaments synthétiques Expired - Lifetime EP0539808B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4135383 1991-10-26
DE4135383 1991-10-26

Publications (2)

Publication Number Publication Date
EP0539808A1 EP0539808A1 (fr) 1993-05-05
EP0539808B1 true EP0539808B1 (fr) 1995-01-11

Family

ID=6443498

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92117693A Expired - Lifetime EP0539808B1 (fr) 1991-10-26 1992-10-16 Dispositif de frisage à boîte de bourrage pour filaments synthétiques

Country Status (5)

Country Link
US (1) US5579566A (fr)
EP (1) EP0539808B1 (fr)
CN (1) CN1026136C (fr)
DE (1) DE59201194D1 (fr)
RU (1) RU2052550C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6141843A (en) * 1998-08-27 2000-11-07 Barmag Ag Apparatus and method for stuffer box crimping a synthetic yarn
WO2021104959A1 (fr) 2019-11-29 2021-06-03 Oerlikon Textile Gmbh & Co. Kg Appareil de sertissage d'un fil multifilament

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EP0761855A1 (fr) * 1995-08-23 1997-03-12 Maschinenfabrik Rieter Ag Procédé et dispositif pour le frisage à boîte de bourrage
DE19605675C5 (de) * 1996-02-15 2010-06-17 Oerlikon Heberlein Temco Wattwil Ag Verfahren zum aerodynamischen Texturieren sowie Texturierdüse
TW538153B (en) 1998-03-03 2003-06-21 Heberlein Fibertechnology Inc Process for air-jet texturing of frill yarn and yarn-finishing device and the application thereof
GB9917069D0 (en) * 1999-07-22 1999-09-22 Fibreguide Ltd Yarn treatment jet
US6543106B1 (en) 1999-10-25 2003-04-08 Celanese Acetate, Llc Apparatus, method and system for air opening of textile tow and opened textile tow web produced thereby
US6253431B1 (en) 1999-10-25 2001-07-03 Celanese Acetate Llc Air opening jet apparatus
AU2001254657A1 (en) 2000-03-01 2001-09-12 Barmag Ag Method and device for stuffer crimping
AU2002305174A1 (en) * 2001-04-13 2002-10-28 Johns Hopkins University School Of Medicine Methods and compositions for identifying disease genes using nonsense-mediated decay inhibition
US7534379B2 (en) * 2004-06-25 2009-05-19 Celanese Acetate Llc Process of making cellulose acetate tow
ITMI20081112A1 (it) * 2007-08-02 2009-02-03 Oerlikon Textile Gmbh & Co Kg Dispositivo per arricciare filoni di fibre sintetiche
CN102828294B (zh) * 2011-06-16 2015-04-15 南通醋酸纤维有限公司 填塞箱卷曲机耐磨夹板装置
US8623248B2 (en) 2011-11-16 2014-01-07 Celanese Acetate Llc Methods for producing nonwoven materials from continuous tow bands
DE102013003408A1 (de) 2013-02-28 2014-08-28 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum pneumatischen Fördern und Führen eines multifilen Fadens
DE102014002318A1 (de) * 2014-02-19 2015-08-20 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum Kräuseln multifiler Fäden
CN104451993B (zh) * 2014-11-20 2017-01-25 苏州金纬化纤工程技术有限公司 膨化变形长丝喷嘴系统
SI3337920T1 (sl) * 2015-06-30 2019-11-29 Heberlein Ag Oblikovani del za jedro šobe, stiskalna naprava za jedro šobe za stiskanje, razširitveni komplet, blokirna naprava in nastavitveni element, vključno z njihovim postopkom
CN107829176B (zh) * 2017-11-17 2019-12-03 武汉纺织大学 一种用于纱线超光洁处理的瓣合式装置的应用

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EP0189099B1 (fr) * 1985-01-19 1989-01-11 B a r m a g AG Tuyère pour la texturation d'un fil

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CN1006910B (zh) * 1985-07-20 1990-02-21 巴马格·巴默机器制造股份公司 用于丝变形的喷嘴
BE905590A (fr) * 1985-10-19 1987-02-02 Barmag Barmer Maschf Procede d'insertion d'un fil dans une filiere de texturisation.
DE3627513C2 (de) * 1986-08-13 1996-09-19 Barmag Barmer Maschf Düse zum Texturieren eines laufenden Fadens
WO1989001539A1 (fr) * 1987-08-15 1989-02-23 Deutsche Institute für Textil- und Faserforschung Dispositif de torsion de fils

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0189099B1 (fr) * 1985-01-19 1989-01-11 B a r m a g AG Tuyère pour la texturation d'un fil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6141843A (en) * 1998-08-27 2000-11-07 Barmag Ag Apparatus and method for stuffer box crimping a synthetic yarn
WO2021104959A1 (fr) 2019-11-29 2021-06-03 Oerlikon Textile Gmbh & Co. Kg Appareil de sertissage d'un fil multifilament

Also Published As

Publication number Publication date
RU2052550C1 (ru) 1996-01-20
US5579566A (en) 1996-12-03
CN1074960A (zh) 1993-08-04
EP0539808A1 (fr) 1993-05-05
DE59201194D1 (de) 1995-02-23
CN1026136C (zh) 1994-10-05

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