EP1762644B1 - Process and apparatus for the meltspinning of filament yarns - Google Patents
Process and apparatus for the meltspinning of filament yarns Download PDFInfo
- Publication number
- EP1762644B1 EP1762644B1 EP06018300A EP06018300A EP1762644B1 EP 1762644 B1 EP1762644 B1 EP 1762644B1 EP 06018300 A EP06018300 A EP 06018300A EP 06018300 A EP06018300 A EP 06018300A EP 1762644 B1 EP1762644 B1 EP 1762644B1
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- European Patent Office
- Prior art keywords
- air
- section
- fall tube
- permeable
- shaft
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- 238000007664 blowing Methods 0.000 abstract description 7
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Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
- D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
Definitions
- the invention relates to a melt spinning process for producing filament yarns, in particular in the form of synthetic yarns having coarser titers (> 500 dtex) such as so-called BCF (Bulked Continuous Filament) for use in the form of carpet yarn, T & I (technical and industrial) yarns and tire cord.
- BCF Binary Continuous Filament
- the invention also provides innovations in the corresponding devices and devices for the production.
- BlasSWchte also called Blashunt or Anblashunt
- thread trap tubes also called just downpipe or chute or spin shaft or shaft shaft
- the invention is particularly intended for use in a plant where the cooling air is added to the filaments in a cross-flow cooling zone below the spinneret - see Fourné, page 348.
- the preferred solution comprises a rectangular cross-air blower shaft - see Fourné, page 352.
- Such solutions provide for the supply of conditioned air into the blower shaft. This step involves considerable costs. It is therefore important that the designed cooling effect is not distorted by uncontrollable air currents in the system.
- the object of the invention is to achieve a sufficiently vortex-free air flow without backflow through the targeted management of air flows and compliance with certain pressure gradients throughout the blow duct / downpipe system, so that the yarn formation is at least not significantly affected by these factors.
- the filament bundles run in pairs through the downpipe usually to about 0.3 to 1 m below the downpipe end, where they ever merged into a closed thread become.
- the individual threads have a lateral distance of about 30 to 100 mm from each other.
- air is added to the process in large quantities to cool the extruded filaments. This takes place in the blow shaft (i, Fig. 1 ).
- the amount of air depends essentially on the mass to be cooled - the throughput [kg / h]. Other parameters that affect the amount of air are the spun polymer, the filament titer and the spinning speed.
- a drop tube with a rectangular cross-section has an inlet with the width H. If the outlet has the same width H, the distance of the outermost filaments L (left and right) to the corresponding side wall S from top to bottom is constantly larger. This creates in the vicinity of the side walls S ratios, which favor return flows R. Whether such backflow R arise in a particular case, depends on the operating conditions, eg. B. from the take-off speed of the filament bundles and / or from the amount of air supplied. For predetermined flow conditions it will be possible to have such backflows R by baffles W to prevent. The use of such baffles W is possible because the filament bundles (in the FIG.
- the inlet width into the drafting system r ( Fig. 1 ) is therefore narrower than the outlet width of the spinnerets. (Not shown).
- the guide walls W would ideally be viewed from the front than ever to make a curve (without kink), which follow the optimal flow lines between the inlet width H and the narrow outlet width h.
- these optimal ratios could only be achieved for a predetermined set of operating conditions, while in practice a downer has to operate with different sets of operating parameters.
- this tube can be used flexibly enough for the intended operating range.
- the blower shaft / downpipe system according to FIG. 1 is again schematically in the FIG. 2 shown.
- today's blast chutes are 10 ( FIG. 2 ) for the cross-flow cooling usually rectangular in cross-section.
- the front wall which is in the FIG. 2 is viewed directly, is usually equipped with service doors, which release the access to the interior of the blower shaft when opening. These doors are usually "porous" (air permeable) to allow some pressure or flow equalization between the interior of the blow duct 10 and the environment.
- the back wall, which is in the FIG. 2 is not apparent, is permeable to the ingress of cooling air into the cooling space below the spinnerets (in Fig. 2 not shown, see Fourné, pages 348 and 352, respectively).
- the downpipe 12 adjoins, which usually has an upper part 14 with a constant cross-section and a lower part 16 with a taper.
- the taper is formed by converging ("tapered") sidewalls 18, 20 with the back and front walls in approximately parallel (vertical) planes.
- all walls of the downpipe are impermeable to air currents in order to shield the "air budget" within the pipe from interfering influences from the environment. In practice, however, it is often impossible to avoid smaller openings in the structure, which unwanted air currents enable. Ambient air can also enter between the blow duct 10 and the downpipe 12.
- the threads 22, 24 run from the spinnerets in a straight line (seen from the front) down to the first thread guide (not shown) in the inlet part of the drafting system (r, FIG. 1 ). As already explained, they are subjected to a Querblas Kunststoffkühlung in the blower shaft 10.
- the down in the downpipe 12 Filamentbündel 22, 24 (dashed lines drawn center lines) each entrain a large amount of air from the blow shaft 10 with it - see Fourné, page 184 to 192, in particular page 191.
- By the convergent (“conical") Shape of the lower part 16 of the downpipe is the cross section at the lower end 5 to 10 times smaller than at the upper end.
- the cross-sectional profile from top to bottom preferably has no extensions, because the risk of boundary layer separation in the case of a cross-sectional widening is much higher than in the case of a taper.
- the high air velocity at the lower end of the downpipe 12, which is generated at least in part as a side effect of the cross-sectional tapering, can also occur during the spin finish application in the inlet part of the drafting system (r, Fig. 1 ) have a disruptive effect.
- FIG. 3 shows an improved arrangement for the blow duct 10 and the downpipe 12A.
- the drop tube 12A is formed conically over its entire length, that the side walls 26, 28 converge down and taper the flow cross-section downwards. The distance of the outermost filaments to the side walls 26, 28 of the downpipe 12A is thus more or less constant. Vortex formation and backflow are inhibited over the entire length of the drop tube 12A.
- This arrangement of the downpipe 12A has been used in the "Pathfinder" BCF system of Maschinenfabrik Rieter AG, but with relatively short downpipe lengths of approx. 2.5m. However, this tube length is not suitable / sufficient for all applications.
- the cross section at the lower end of the downpipe can be made smaller. However, this again leads to an increase in the exit velocity of the air at the lower end of the drop tube 12A and does not solve the problem with it.
- a significant improvement can be achieved by making at least one wall of the downpipe over part of its length permeable to air. From the air-permeable wall elements flows from a part of the downwardly flowing air.
- the main air flow in the downpipe is largely adapted by this measure the downwardly decreasing cross-section.
- the air velocity in the downpipe thus does not rise to the lower end or only insignificantly.
- a very slightly accelerated downward flow may be advantageous, since experience has shown that slightly accelerated flows are less prone to vortex formation.
- the side openings in the downcomer may be attached to one or more sides over part or the entire length of the downcomer. They can also be designed completely around the circumference.
- the arrangement according to the invention nevertheless differs from the DE-A-10323532 in that the cross section of the new downpipe tapers downwards.
- FIGS. 4 A and B together show a first embodiment for the lateral discharge of the air from the downcomer 12B, wherein the shape of the tube 12B, in particular the side walls 26 and 28, respectively, has remained unchanged with respect to the tube 12A.
- the rear wall 30 ( Fig. 4B ) of the drop tube 12B - ie, the downcomer wall on the same side as the blast chute wall with the openings for the blast air inlet into the blast chute 10 - is provided in the lower portion 32, adjacent to the air or thread outlet 34, with openings.
- These openings are designed as side air outlets, ie the Rear wall 30 has now been made permeable to air. This preferably takes place in that the section 32 of the rear wall 30 is formed by a perforated plate.
- the lateral openings could also be formed, for example, by a sieve. The openings should definitely prevent unwanted leakage of the threads from the drop tube 12B during piecing.
- the sum of the flow-free surfaces generated by the openings in relation to the total area of the perforated section 32 of the rear wall 30 determines the so-called "porosity" of this wall section 32.
- porosity determines the flow resistance to lateral flows in this section.
- This resistance should be selected such that there is a slight overpressure (eg in the range of 0.1 to 3 Pascal, preferably in the range of 0.1 to 1 Pascal) at all points in the vicinity of the walls of the downpipe 12B with respect to the environment , This can be ensured that no ambient air penetrates into the downpipe 12B, wherein the cross-sectional taper also does not lead to an intolerable increase in the speed of the remaining air.
- a slight overpressure eg in the range of 0.1 to 3 Pascal, preferably in the range of 0.1 to 1 Pascal
- the porosity of the or a perforated section 32 is conveniently in the range 5 to 50% and preferably in the range 20 to 40%.
- the total length of the perforated walls is preferably not more than 50% of the total length of the walls of the drop tube 12B.
- Figures 5 and 6 show further embodiments for the formation of the downpipe 12C ( Fig. 5 ) or 12D ( Fig. 6 ), wherein in both embodiments a respective porous section 32 of the respective rear wall 30 (FIG. Fig. 5 ) or 30A ( Fig. 6 ) is provided.
- the drop tube 12 C may be formed of an upper part 36 and a lower part 38.
- the side walls 26A, 28A are configured to converge in the upper part 36 at a first cone angle, and in the lower part 38 at a second cone angle.
- the "kink" between adjacent parts can therefore, in comparison to the arrangement according to the FIG. 2 , which reduces the risk of boundary layer separation at these sites.
- the lower part 38 comprises the porous portion 32 of the back wall 30, with the back wall 30 and the front wall 40 still standing in respective vertical planes.
- the side walls 26A, 28A are opposite to the embodiment according to FIGS FIG. 5 remained unchanged.
- the rear wall 30A and front wall 40A now also converge in the lower part 38 of the drop tube 12D in order to narrow the cross section of the drop tube 12D at the outlet 34A in the lower part 38 even further. Thereby, the risk of backflow and vortex formation in "dead corners" near the lower air outlet 34A can be further reduced.
- the shape of the drop tube 12F is the shape of the drop tube 12B (FIG. Fig. 4 ), in particular in that the walls 26, 28 also converge downwards over the entire length of the drop tube 12F.
- the front wall and rear wall 30B are also arranged in respective vertical planes in this case.
- a plurality (in this case, three) perforated sections 42, 44, 46 ( FIG. 7B ) is provided in the rear wall 308. This allows for further improvement of the flow conditions within the downcomer 12F by adjusting the lengths or porosity of the respective sections 42, 44, 46 to the flow conditions within the tube 12F.
- the airflow exiting laterally from the drop tube 12F may be regulated as a whole or divided into partial flows by suitable means D1, D2, D3.
- the appropriate means D1, D2, D3 include z. B: flaps D1, D2, D3, fans V etc.
- the laterally exiting air streams in a closed exhaust system 50 Fig. 7B
- throttle valves D1, D2 and D3 are dosed.
- the air is sucked off by a fan V.
- the whole device is thus less sensitive to pressure fluctuations in the vicinity of the downpipe 12F. Such disturbing pressure fluctuations can be in a building z. B. arise through the opening and closing of doors.
- the pressure and velocity course in the drop tube 12F can be easily optimized.
- the flow should be formed as stationary as possible and vortex-free. It is not just about the optimization of the flow, it is also boundary conditions such as the air velocity at the exit of the filaments at the lower end of the downpipe, the pressure curve in the whole system and to include the handling.
- FIG. 9 shows schematically in FIG. 9 shown where the reference numeral 10 again designates the blow duct and the downpipe has an upper part 52 and a lower part 54.
- the flow cross-section in the upper part 52 is substantially constant over its length and approximately equal to the flow cross-section at the transition from the blowing shaft 10.
- the flow cross section in the lower part 54 tapers down substantially equal to the previously known solutions, in connection with the FIGS. 1 and 2 were declared.
- the length L 1 of the upper part 52 is preferably not more than 10% of the total length of the drop tube.
- the service door in the front wall of the blower shaft 10 can be designed with a relatively low porosity in order to minimize the incoming and outgoing air quantity at this point.
- the doors of today conventional blast chutes 10 are normally designed with a porosity in the range 50%, d. H. Approximately 50% of the total area of the doors is released for the inflow and outflow of air.
- a blower shaft 10 for use with a downer according to this invention preferably has service doors with a porosity not greater than 20% and typically in the range 4 to 8%.
- the free flow openings are preferably distributed over the entire surface of the service doors.
- FIG. 10 shows with solid lines a version that in principle the execution according to the FIG. 4 is the same, wherein the blow shaft 10 in the FIG. 10 is shown without shading.
- dashed lines has been suggested that the side walls S of the downpipe 12 could be continued upward in the blow duct 10.
- the blow duct 10 is partially tapered down and the downpipe 12 joins it without discontinuities in the cross-sectional profile.
- the distance between the outermost filaments and the nearest wall S can therefore be kept exactly constant in this embodiment both partially in the blow duct 10 and in the downpipe 12.
- the "flow kink" which normally appears at the wall transition between the blow duct 10 and the downpipe 12 can be avoided.
- a downcomer 12 preferably has a length from the blow duct 10 to the air outlet 34 at the lower end of at least 2.5 m, preferably 3 to 5 m.
- the air velocity at the outlet (lower end) 34 is between 0 and 7 m / sec, preferably between 2 and 4 m / sec.
- the filament speed at the exit 34 from the downcomer 12 is normally 12 to 20 m / sec, preferably about 14 to 16 m / sec.
- the embodiments according to the figures are all designed for spinning plants, which have two threads per position, ie per downpipe.
- the invention is applicable even if more than two threads per position, for. B. up to 12 threads per position, are provided. For this reason, the drop tube is rectangular in cross section.
- partitions may be provided within the blow duct and the downcomer.
- separate downcomers are provided so that the filament bundles pass in pairs through a downspout with the bundles of a pair adjacent the side walls. The maximum possible convergence of the sidewalls is then given by the path of the outermost filaments until merger. The same considerations determine the maximum possible convergence of the back and front walls of the downpipe.
- filament bundles are preferably assigned in pairs to the drop tubes of a system, it is possible to assign several (at least two) bundle pairs to a common blow shaft.
- FIG. 11 Such an arrangement is shown schematically in FIG FIG. 11 the use of the reference numerals 10, 52, 54, 32 and 34 in the FIG. 11 the use of the same characters in the FIG. 9 equivalent.
- the design principles according to this invention allow a downpipe design that provides a largely stationary, swirl-free air flow even at different air flow rates.
- the downpipe can now be designed such that Grenz fürabitesen be prevented as far as possible.
- Useful in this connection is a blow duct / downpipe design, in which over the entire length no sudden cross-sectional changes are present.
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Abstract
Description
Die Erfindung bezieht sich auf ein Schmelzspinnverfahren zur Herstellung von Filamentgarnen, insbesondere in der Form von synthetischen Fäden mit gröberen Titern (> 500 dtex) wie sogenannte BCF (Bulked Continuous Filament) zur Verwendung in der Form von Teppichgarn, T&I (technische und industrielle) Garne und Reifencord. Die Erfindung sieht auch Neuerungen in den entsprechenden Vorrichtungen und Einrichtungen für die Herstellung vor.The invention relates to a melt spinning process for producing filament yarns, in particular in the form of synthetic yarns having coarser titers (> 500 dtex) such as so-called BCF (Bulked Continuous Filament) for use in the form of carpet yarn, T & I (technical and industrial) yarns and tire cord. The invention also provides innovations in the corresponding devices and devices for the production.
Die Herstellung und Verarbeitung von Filamentgarn mittels Schmelzspinnen ist grundsätzlich im Buch "
Die sogenannten Blasschächte (auch Blaskammer bzw. Anblaskammer genannt), mit den ihnen zugeordneten Fadenfallröhren (auch bloss Fallrohr bzw. Fallschacht bzw. Spinnschacht bzw. Fadenschacht genannt), bilden eine wichtige Einrichtungsgruppe in einer Schmelzspinnanlage - Fourne, Seiten 348 bis 368. Diese Einrichtungen werden nächfolgend näher anhand der
Aus
Aus
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- ein oberer Schachtteil mit rechteckigem Querschnitt, konstanter Breite zwischen den Schacht-Seitenwänden und in Abzugsrichtung verjüngender Tiefe zwischen Schacht-Vorder- und -Rückwand;
- ein mittlerer Schachtteil mit rechteckigem Querschnitt, sich in Abzugsrichtung verjüngender Tiefe und wahlweise verjüngender Breite; und
- ein unterer Schachtteil mit konstantem Querschnitt, welcher bis nahe an das Abzugssystem reicht, wobei
- Luft nahe dem Austritt aus dem mittleren Schachtteil abgezogen wird.
- an upper shaft portion of rectangular cross-section, constant width between the shaft side walls and in the withdrawal direction tapering depth between the shaft front and rear wall;
- a middle shaft part with rectangular cross-section, in the withdrawal direction of tapering depth and optionally tapering width; and
- a lower shaft section with a constant cross section, which extends to close to the trigger system, wherein
- Air is withdrawn near the exit from the middle shaft part.
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Diese bekannten Anordnungen sehen eine individuelle Behandlung für jeden Faden vor. Auch im Falle der
Aufgabe der Erfindung ist, durch die gezielte Führung der Luftströme und Einhaltung von bestimmten Druckverläufen im ganzen Blasschacht/fallrohr-System eine ausreichend wirbelfreie Luftströmung ohne Rückströmungen zu erreichen, so dass die Garnbildung zumindest nicht wesentlich durch diese Einflussfaktoren beeinträchtigt wird.The object of the invention is to achieve a sufficiently vortex-free air flow without backflow through the targeted management of air flows and compliance with certain pressure gradients throughout the blow duct / downpipe system, so that the yarn formation is at least not significantly affected by these factors.
Diese Aufgabe wird durch die Merkmale der unabhängigen Ansprüche erfüllt.This object is achieved by the features of the independent claims.
Ausführungsbeispiele werden nachfolgend anhand der Figuren beschrieben. Es zeigt:
- Figur 1A
- schematisch eine Ansicht einer Schmelzspinnanlage gemäss dem Stand der Technik
- Figur 1B
- eine Seitenansicht der gleichen Anlage
- Figur 2
- schematisch eine Ansicht eines Blasschacht-/Fallrohrsystems gemäss dem Stand der Technik
- Figur 3
- schematisch eine bekannte Modifikation der Anordnung gemäss
Figur 1 - Figur 4
- in der
Figur 4A eine Vorder- und in derFigur 4B eine Seitenansicht einer ersten Ausführung gemäss der vorliegenden Erfindung - Figur 5
- in der
Figur 5A eine Vorder- und in derFigur 5B eine Seitenansicht einer zweiten Ausführung gemäss der vorliegenden Erfindung - Figur 6
- in der
Figur 6A eine Vorder- und in derFigur 6B eine Seitenansicht einer dritten Ausführung gemäss der vorliegenden Erfindung - Figur 7
- in der
Figur 7A eine Vorder- und in derFigur 7B eine Seitenansicht einer vierten Ausführung gemäss der vorliegenden Erfindung - Figur 8
- ein Diagramm zur Erklärung von Strömungsverhältnisse im Fallrohr
- Figur 9
- eine schematische Darstellung einer Modifikation der Anordnung gemäss der
Figur 2 und/oder 3 Figur 10- eine schematische Darstellung einer Modifikation der Anordnung gemäss der
Figur 4 , und - Figur 11
- schematisch eine Modifikation der Anordnung gemäss der
Figur 9 .
- Figure 1A
- schematically a view of a melt spinning plant according to the prior art
- FIG. 1B
- a side view of the same plant
- FIG. 2
- schematically a view of a blowgap / downpipe system according to the prior art
- FIG. 3
- schematically a known modification of the arrangement according to
FIG. 1 - FIG. 4
- in the
FIG. 4A a front and in theFIG. 4B a side view of a first embodiment according to the present invention - FIG. 5
- in the
FIG. 5A a front and in theFIG. 5B a side view of a second embodiment according to the present invention - FIG. 6
- in the
FIG. 6A a front and in theFIG. 6B a side view of a third embodiment according to the present invention - FIG. 7
- in the
FIG. 7A a front and in theFIG. 7B a side view of a fourth embodiment according to the present invention - FIG. 8
- a diagram for explaining flow conditions in the downpipe
- FIG. 9
- a schematic representation of a modification of the arrangement according to the
FIG. 2 and / or 3 - FIG. 10
- a schematic representation of a modification of the arrangement according to the
FIG. 4 , and - FIG. 11
- schematically a modification of the arrangement according to the
FIG. 9 ,
Die
- a - Spinnbalken mit Düsenblöcke (nicht gezeigt)
- c - Spinnpumpen
- d - Spinnpumpenantriebe
- f -Spinnextruder
- i - Blasschacht
- k - Fallrohr
- n2 - Schnellspulköpfe (Revolverspulautomat)
- r - Streckwerk mit Heissstreckgaletten
- w - Diphylverdampfer und Diphyl-Leitung
- y - klimatisierte Zuluft.
- a - Spinning beam with nozzle blocks (not shown)
- c - spinning pumps
- d - spinning pump drives
- f Spider extruder
- i - Blowing shaft
- k - downpipe
- n2 - quick-winding heads (revolver-winder)
- r - drafting system with hot stretch godets
- w - Diphyl evaporator and Diphyl line
- y - conditioned air supply.
Die Filamentbündel laufen paarweise durch das Fallrohr meistens bis etwa 0,3 bis 1 m unterhalb des Fallrohrendes, wo sie je zu einem geschlossenen Faden zusammengeführt werden. Die einzelnen Fäden haben dort einen seitlichen Abstand von etwa 30 bis 100 mm voneinander. Bei der Herstellung von Garnen mit gröberen Titern, wie BCF- und technischen Garnen, sowie Reifencord, wird zur Abkühlung der extrudierten Filamente Luft in grossen Mengen dem Prozess beigegeben. Dies erfolgt im Blasschacht (i,
Durch die generelle Weiterentwicklung, insbesondere des BCF-Herstellprozesses, sind mittlerweile bedeutend höhere Prozessgeschwindigkeiten möglich als bisher. Dadurch wird auch der maximale Massendurchsatz von BCF- Maschinen wesentlich gesteigert. Dadurch ist es auch notwendig, die Kühlluftmenge erheblich zu steigern.
Hierbei kann beobachtet werden, dass die herkömmlichen Fallschächte (Fallrohre) nur ungenügend geeignet sind, grosse Luftmengen zu transportieren, ohne die mit durch den Fallschacht geleitete Filamente negativ zu beeinflussen. Die Filamente werden hauptsächlich durch Erscheinungen instationärer Strömungen, wie Rückströmungen, Strömungsablösungen, Verwirbelungen und Strömungsverwindungen, negativ beeinflusst. Hierdurch entstehen unerwünschte Bewegungen der Filamente die im Extremfall eine unzulässige Berührung von Filamenten im Blasschacht, die direkt oder im weiteren Verlauf des Prozesses zu Filamentbrüchen führen können.Due to the general further development, in particular of the BCF production process, significantly higher process speeds are now possible than before. This also significantly increases the maximum mass throughput of BCF machines. This also makes it necessary to increase the amount of cooling air considerably.
Here it can be observed that the conventional downpipes (downpipes) are only insufficiently suitable for transporting large amounts of air without adversely affecting the filaments guided through the chute. The filaments are adversely affected mainly by the appearance of unsteady flows, such as backflow, flow separation, turbulence and flow distortions. This results in unwanted movements of the filaments which in extreme cases an impermissible contact of filaments in the blow duct, which can lead to filament breaks directly or later in the process.
Diese Aussagen können näher anhand des Diagramms in der
Das Blasschacht-/Fallrohrsystem gemäss der
An der Unterseite des Blasschachts 10 schliesst das Fallrohr 12 an, das in der Regel einen oberen Teil 14 mit einem konstanten Querschnitt und einen unteren Teil 16 mit einer Verjüngung aufweist. Die Verjüngung ist durch konvergierende ("konisch zutaufende") Seitenwände 18, 20 gebildet, wobei die hinteren und vorderen Wände in ungefähr parallelen (senkrechten) Ebenen stehen. Prinzipiell sind alle Wände des Fallrohrs gegenüber Luftströmungen undurchlässig, um den "Lufthaushalt" innerhalb des Rohrs von störenden Einflüssen aus der Umgebung abzuschirmen. In der Praxis ist es aber oft unmöglich, kleinere Öffnungen in der Struktur zu vermeiden, welche ungewollte Luftströmungen ermöglichen. Umgebungsluft kann auch zwischen dem Blasschacht 10 und dem Fallrohr 12 eintreten.At the bottom of the blowing
Die Fäden 22, 24 laufen von den Spinndüsen in gerader Linie (von vorne gesehen) nach unten auf den ersten Fadenführer (nicht gezeigt) im Einlaufteil des Streckwerkes (r,
Beim Austritt aus den Spinndüsen (nicht gezeigt) sind die einzelnen Filamente eines Fadens 22, 24 über eine grössere Fläche gleichmässig verteilt (in
Im weiteren entstehen seitlich im oberen Teil 14 des Fallrohres 12 Wirbel. Diese Wirbel bewirken Rückströmungen der Luft und damit eine Verstärkung der Turbulenzen. Die Wirbel sind zudem örtlich und zeitlich nicht stabil und bewegen sich mit den Fäden 22, 24 nach unten. Im oberen Teil 14 bilden sich dann ständig wieder neue Wirbel aus. Auch dieser Effekt führt zu einer starken Unruhe bei den durch das Fallrohr 12 laufenden Fäden 22, 24. Durch den unruhigen Lauf können sich die Filamente gegenseitig berühren. Im oberen Teil des Blasschachtes 10 sind die Filamente noch weich und klebrig, wenn sie sich dort berühren kleben sie zusammen. Das führt in den nachfolgenden Prozessstufen zu Laufstörungen oder Fadenbrüchen.In addition arise laterally in the
Die im Blasschacht 10 in horizontaler Richtung zugeführte Kühlluft wird aber auch im Falle der
Um die nach unten geförderte Luftmenge zu begrenzen, kann der Querschnitt am unteren Ende des Fallrohres kleiner gewählt werden. Das führt aber wieder zu einer Steigerung der Austrittsgeschwindigkeit der Luft am unteren Ende des Fallrohres 12A und löst das Problem damit nicht.In order to limit the amount of air conveyed down, the cross section at the lower end of the downpipe can be made smaller. However, this again leads to an increase in the exit velocity of the air at the lower end of the drop tube 12A and does not solve the problem with it.
Eine wesentliche Verbesserung kann erzielt werden indem mindestens eine Wand des Fallrohres über einen Teil ihrer Länge luftdurchlässig gestaltet wird. Aus den luftdurchlässigen Wandelementen fliesst ein Teil der nach unten strömenden Luft ab. Der Haupt-Iuftstrom im Fallrohr wird durch diese Massnahme dem nach unten abnehmenden Querschnitt weitgehend angepasst. Die Luftgeschwindigkeit im Fallrohr steigt damit gegen das untere Ende nicht oder nur unwesentlich an. Eine ganz leicht nach unten beschleunigte Strömung kann dabei vorteilhaft sein, da erfahrungsgemäss leicht beschleunigte Strömungen weniger zur Wirbelbildung neigen. Die seitlichen Öffnungen im Fallrohr können an einer oder mehreren Seiten über einem Teil oder über die ganze Länge des Fallrohres angebracht werden. Sie können auch vollständig rundumlaufend ausgeführt sein. Die Anordnung gemäss der Erfindung unterscheidet sich trotzdem von der
Die
Die Summe der durch die Öffnungen erzeugten strömungsfreien Flächen im Verhältnis zur Gesamtfläche des perforierten Abschnitts 32 der Rückwand 30 bestimmt die sogenannte "Porosität" dieses Wandabschnitts 32. Je nach Struktur und freier Oberfläche dieser Elemente kann damit eine gezielte Dosierung des im Abschnitt 32 abgehenden Luftstromes erzielt werden. Die Porosität und die Gesamtfläche des perforierten Abschnitts bestimmen zusammen den Strömungswiderstand gegenüber lateralen Strömungen in diesem Abschnitt. Dieser Widerstand ist derart zu wählen, dass an allen Stellen in der Nähe der Wände des Fallrohrs 12B ein leichter Überdruck (z. B. im Bereich 0,1 bis 3 Pascal, vorzugsweise im Bereich 0,1 bis 1 Pascal) gegenüber der Umgebung herrscht. Damit kann abgesichert werden, dass keine Umgebungsluft in das fallrohr 12B eindringt, wobei die Querschnittsverjüngung auch nicht zu einer nicht tolerierbaren Geschwindigkeitserhöhung der verbleibenden Luft führt.The sum of the flow-free surfaces generated by the openings in relation to the total area of the
Die Porosität des bzw. eines perforierten Abschnitts 32 liegt zweckmässigerweise im Bereich 5 bis 50% und vorzugsweise im Bereich 20 bis 40%. Die Gesamtlänge der perforierten Wände beträgt vorzugsweise nicht mehr als 50% der Gesamtlänge der Wände des Fallrohrs 12B.The porosity of the or a
In der Ausführung gemäss der
Weitere Verbesserungen bei der Steuerung der verschiedenen Luftströme können durch eine Anordnung nach
Um die Anpassungsfähigkeit des Systems noch weiter zu erhöhen, kann der aus dem Fallrohr 12F seitlich austretende Luftstrom als Ganzes oder in Teilströme unterteilt mit geeigneten Mitteln D1, D2, D3 reguliert bzw. eingestellt werden. Die dafür geeigneten Mittel D1, D2, D3 umfassen z. B: Klappen D1, D2, D3, Ventilatoren V etc. In der Ausführung gemäss der
Durch diese Ausführungen ist es gelungen, ein Design oder eine Designsystematik zu entwickeln, das oder die eine Strömung im Fallschacht ermöglicht, die auch bei grösseren Luftmengen die Filamentbewegung im Fallschacht nicht negativ beeinflusst. Hierzu soll die Strömung möglichst stationär und wirbelfrei ausgebildet sein. Es geht dabei nicht allein um die Optimierung der Strömung, es sind auch Randbedingungen wie die Luftgeschwindigkeit am Austritt der Filamente am unteren Ende des Fallrohres, der Druckverlauf im ganzen System und das Handling mit einzubeziehen.Through these designs, it has been possible to develop a design or a design system that allows a flow in the chute, which does not adversely affect the filament movement in the chute even with larger amounts of air. For this purpose, the flow should be formed as stationary as possible and vortex-free. It is not just about the optimization of the flow, it is also boundary conditions such as the air velocity at the exit of the filaments at the lower end of the downpipe, the pressure curve in the whole system and to include the handling.
Die Erfindung ist nicht auf die Ausführungen gemäss den
Es ist auch möglich, bzw. praktisch unvermeidbar, durch die Beeinflussung der Strömungsverhältnisse im Fallrohr die Strömungsverhältnisse, insbesondere den Druck, im Blasschacht 10 zu beeinflussen. Durch die geeignete Gestaltung des Fallrohres kann insbesondere ein schädlicher Unterdruck bzw. Überdruck im Blasschacht 10 vermieden werden. Um diesen Vorteil noch weiter auszubauen, kann die Bedienungstüre in der Vorderwand des Blasschachts 10 mit einer relativ geringen Porosität ausgeführt werden, um die ein- bzw. austretende Luftmenge an dieser Stelle auf ein Minimum zu begrenzen. Die Türen der heute konventionellen Blasschächte 10 sind normalerweise mit einer Porosität im Bereich 50% ausgeführt, d. h. ca. 50% der Gesamtfläche der Türen ist für das Ein- bzw. Ausströmen von Luft freigelassen. Ein Blasschacht 10 zur Verwendung mit einem Fallrohr gemäss dieser Erfindung weist vorzugsweise Bedienungstüren mit einer Porosität nicht grösser als 20% und typischerweise im Bereich 4 bis 8%. Die freien Strömungsöffnungen sind vorzugsweise über die Gesamtfläche der Bedienungstüren verteilt.It is also possible, or virtually unavoidable, to influence the flow conditions, in particular the pressure, in the
Wie schon im Zusammenhang mit der
Die
Ein Fallrohr 12 gemäss dieser Erfindung weist vorzugsweise eine Länge vom Blasschacht 10 bis zum Luftaustritt 34 am unteren Ende von mindestens 2,5 m, vorzugsweise 3 bis 5 m auf. Die Luftgeschwindigkeit am Austritt (unteren Ende) 34 liegt zwischen 0 und 7 m/sek., vorzugsweise zwischen 2 und 4 m/sek. Die Filamentgeschwindigkeit beim Austritt 34 aus dem Fallrohr 12 beträgt normalerweise 12 bis 20 m/sek., vorzugsweise ca. 14 bis 16 m/sek.A
Die Ausführungsformen gemäss den Figuren sind alle für Spinnanlagen konzipiert, die zwei Fäden pro Position, d. h. pro Fallrohr, aufweisen. Die Erfindung ist auch dann anwendbar, wenn mehr als zwei Fäden pro Position, z. B. bis zu 12 Fäden pro Position, vorgesehen sind. Aus diesem Grund ist das Fallrohr rechteckig im Querschnitt. Bei einer hohen Anzahl von Filamentbündel pro Position können Trennwände innerhalb des Blasschachts und des Fallrohrs vorgesehen werden. In der bevorzugten Lösung werden aber getrennte Fallrohre vorgesehen, so dass die Filamentbündel paarweise durch ein Fallrohr laufen, wobei die Bündel eines Paares neben den Seitenwänden angeordnet sind. Die maximal mögliche Konvergenz der Seitenwände ist dann durch den Laufweg der äussersten Filamente bis zum Zusammenschluss gegeben. Die gleichen Überlegungen bestimmen die maximal mögliche Konvergenz der Rück- und Vorderwände des Fallrohrs. Obwohl die Filamentbündel vorzugsweise paarweise den Fallröhren einer Anlage zugeordnet sind, ist es möglich mehrere (mindestens zwei) Bündelpaare einem gemeinsamen Blasschacht zuzuordnen. Eine derartige Anordnung ist schematisch in der
Die Auslegungsprinzipien gemäss dieser Erfindung ermöglichen ein Fallrohrdesign, das eine weitgehend stationäre, wirbelfreie Luftströmung auch bei unterschiedlichen Luftdurchsätzen ergibt. Das Fallrohr kann nun derart gestaltet werden, dass Grenzschichtablösungen weitestgehend verhindert werden. Zweckmässig in diesem Zusammenhang ist ein Blasschacht-/Fallrohrdesign, bei dem über die gesamte Länge keine sprungartigen Querschnittsveränderungen vorhanden sind.The design principles according to this invention allow a downpipe design that provides a largely stationary, swirl-free air flow even at different air flow rates. The downpipe can now be designed such that Grenzschichtablösungen be prevented as far as possible. Useful in this connection is a blow duct / downpipe design, in which over the entire length no sudden cross-sectional changes are present.
Die Erfindung soll nicht anhand einer bestimmten Theorie der Arbeitsweise eingeschränkt werden. Die folgenden Erklärungen werden daher nur im Sinne einer Erläuterung möglicher Zusammenhänge zwischen den konkret vorgeschlagenen Massnahmen vorgelegt. Weitere Untersuchungen werden möglicherweise belegen, dass diese theoretischen Erklärungen mindestens zum Teil geändert werden müssen:
- Die Kühlluft, die in den Blasschacht eingeführt wird, besitzt potentielle (Druck-) Energie. Gegenüber dem Raum um den Blasschacht bzw. dem Fallrohr (der "Umgebung") herrscht Überdruck. Die hohe Pumpwirkung der Filamentbündel wandelt diese potentielle Energie in kinetische Energie um. Die Luftgeschwindigkeit wird dadurch erhöht, der Druck mindert sich. Die Wirkung wird im Fallrohr gesteigert, einerseits weil sich die Filamentgeschwindigkeit durch das Verstrecken der Filamente erhöht und andererseits wegen der Verengung des Fallrohrquerschnitts. Die Gesamtwirkung kann so weit gehen, dass die Luft in einem gewissen Abschnitt des Systems, normalerweise im unteren Teil des Fallrohres aber allenfalls schon im unteren Teil des Blasschachts, gegenüber der Umgebung Unterdruck aufweist. Durch kleinere, unvermeidbare Öffnungen in der Wandstruktur vermengt sich dann Umgebungsluft mit der Kühlluft.. Dadurch wird die Luftmenge im System weiter erhöht und die Wirkung der vorhergehenden Klimatisierung der Kühlluft wird teilweise aufgehoben. Man tritt nun diesen komplexen Wechselwirkungen entgegen, indem man die Luftmenge in mindestens einem Abschnitt des Fallrohres durch Abfliessen reduziert. Dadurch kann die Erhöhung der Luftgeschwindigkeit und das Risiko eines Unterdrucks in Grenzen gehalten werden. Der Luftdruck in diesem Abschnitt muss höher sein als der Umgebungsdruck bzw. der Druck im empfangenden Behälter.
- The cooling air introduced into the blower shaft has potential (pressure) energy. Opposite the space around the blower shaft or the downpipe (the "environment") there is overpressure. The high pumping action of the filament bundles converts this potential energy into kinetic energy. The air velocity is thereby increased, the pressure decreases. The effect is increased in the drop tube, on the one hand because the filament speed increased by the stretching of the filaments and on the other hand because of the narrowing of the drop tube cross section. The overall effect can go so far that the air in a certain portion of the system, usually in the lower part of the downpipe but possibly even in the lower part of the blower, from the environment has negative pressure. By smaller, unavoidable openings in the wall structure then ambient air mixed with the cooling air .. Thus, the amount of air in the system is further increased and the effect of the previous air conditioning of the cooling air is partially canceled. One now counteracts these complex interactions by reducing the amount of air in at least one section of the downpipe by draining. This can limit the increase in air velocity and the risk of negative pressure. The air pressure in this section must be higher than the ambient pressure or the pressure in the receiving vessel.
Die Erfindung ermöglicht somit die Gestaltung eines Blasschacht-/Fallrohrsystems derart, dass die Luftströme reguliert bzw. kontrolliert zu- und weggeführt werden. Vorteilhaft in diesem Zusammenhang ist ein Fallrohrdesign mit
- einer oder mehreren (seitlichen oder rundherum wirkenden) Absaugungen über einen oder mehrere Teilbereiche des Fallrohres, und/oder
- einem Fallrohrdesign, das aus zwei oder mehreren Teilstücken mit unterschiedlichem Konuswinkel zusammengesetzt ist und/oder
- einem Fallrohrdesign, bei dem mindestens eines der Teilstücke in zwei Ebenen konisch ausgebildet ist.
- one or more (lateral or all-around) suction over one or more portions of the downpipe, and / or
- a downpipe design, which is composed of two or more sections with different cone angle and / or
- a downpipe design in which at least one of the sections is conical in two planes.
- aa
- Spinnbalken mit Düsenblöcken (nicht gezeigt)Spinning beam with nozzle blocks (not shown)
- cc
- Spinnpumpenspinning pumps
- dd
- SpinnpumpenantriebeSpin pump drives
- ff
- SpinnextruderSpinning extruder
- ii
- Blasschachtblowing shaft
- kk
- Fallrohrdownspout
- n2n2
- Schnellspulköpfe (Revolverspulautomat)Quick-winding heads (turret winder)
- rr
- Streckwerk mit HeissstreckgalettenDrawframe with hot-draw godets
- ww
- Diphylverdampfer und Diphyl-LeitungenDiphylic evaporator and Diphyl lines
- yy
- klimatisierte Zuluftair conditioned supply air
- 1010
- Blasschachtblowing shaft
- 1212
- Fallrohrdownspout
- 12A12A
-
Fallrohr
Fig. 3 downspoutFig. 3 - 12B12B
-
Fallrohr
Fig. 4 downspoutFig. 4 - 12C12C
-
Fallrohr
Fig. 5 downspoutFig. 5 - 12D12D
-
Fallrohr
Fig. 6 downspoutFig. 6 - 12F12F
-
Fallrohr
Fig. 7 downspoutFig. 7 - 1414
-
oberer Teil des Fallrohres 12, Oberteilupper part of the
downpipe 12, upper part - 1616
-
unterer Teil des Fallrohres 12, konvergenter Unterteillower part of the
drop tube 12, convergent lower part - 1818
- SeitenwandSide wall
- 2020
- SeitenwandSide wall
- 2222
- Fadenthread
- 2424
- Fadenthread
- 2626
-
Seitenwand Fallrohr 12A und 12 F
Side wall downpipe 12A and 12F - 26A26A
-
Seitenwand Fallrohr 12C
Side wall downpipe 12C - 2828
-
Seitenwand Fallrohr 12A und 12F
Side wall downpipe 12A and 12F - 28A28A
-
Seitenwand Fallrohr 12C
Side wall downpipe 12C - 3030
-
Rückwand Fallrohr 12C
Rear wall downpipe 12C - 30A30A
- Rückwand Fallrohr 12DRear wall downpipe 12D
- 30B30B
-
Rückwand Fallrohr 12F
Rear wall downpipe 12F - 3232
-
unterer Abschnitt Fallrohr 12B, 12C, 12D, poröser (luftdurchlässiger) Abschnitt der Rückwand 30 und 30Alower portion of
12B, 12C, 12D, porous (air-permeable) portion ofdownpipe 30 and 30Arear wall - 3434
- Luft- bzw. FadenaustrittAir or thread outlet
- 34A34A
- Austritt (Luft. bzw. Faden) Fallrohr 12DOutlet (air or thread) downpipe 12D
- 3636
-
oberer Teil Fallrohr 12C und 12D
upper part downpipe 12C and 12D - 3838
-
unterer Teil Fallrohr 12C und 12D
lower part downpipe 12C and 12D - 4040
- Vorderwandfront wall
- 40A40A
- Vorderwand Fallrohr 12DFront wall downpipe 12D
- 4242
-
perforierter (poröser bzw. luftdurchlässiger) Abschnitt in Rückwand 30Bperforated (porous or air-permeable) portion in the
rear wall 30B - 4444
-
perforierter (poröser bzw. luftdurchlässiger) Abschnitt in Rückwand 30Bperforated (porous or air-permeable) portion in the
rear wall 30B - 4646
-
perforierter (poröser bzw. luftdurchlässiger) Abschnitt in Rückwand 30Bperforated (porous or air-permeable) portion in the
rear wall 30B - 5050
- Absaugsystemsuction
- 5252
-
oberer Teil Fallrohr
Fig. 9 und11 upper part downpipeFig. 9 and11 - 5454
-
unterer Teil Fallrohr
Fig. 9 und11 lower part downpipeFig. 9 and11
- D1D1
- Drosselklappethrottle
- D2D2
- Drosselklappethrottle
- D3D3
- Drosselklappethrottle
- VV
- Ventilatorfan
- SS
- SeitenwandSide wall
- HH
- EinlaufbreiteFeeding width
- LL
- Äusserste Filamente zu Seitenwand SOutermost filaments to side wall S
- RR
- Rückströmungenbackflow
- WW
- Leitwändebaffles
- hH
- Auslaufbreitespout width
- L1 L 1
-
Länge des oberen Teils 52 (
Fig. 9 und11 )Length of the upper part 52 (Fig. 9 and11 )
Claims (22)
- Fall tube (12) having a wall structure forming a first flow cross section at one end and a second flow cross section at the other end, the second cross section being smaller than the first cross section, characterized in that the cross section increases nowhere in the yarn transportation direction over the length of the fall tube and the wall structure has at least one longitudinal section which is not air permeable and also at least one air-permeable longitudinal section, the arrangement and size of the air-permeable portion being chosen such that there is a slight overpressure at all places in the vicinity of the walls of the fall tube and that the air-permeable section (32, 42, 44, 46) is provided in a wall section where the flow cross section narrows.
- Fall tube (12) according to claim 1, characterized in that the wall structure has a plurality of longitudinal sections which are not air permeable and also a plurality of air-permeable longitudinal sections.
- Fall tube (12) according to any one of the preceding claims, characterized in that the porosity of the or each air-permeable section (32, 42, 44, 46) is in the range from 5 to 50% and preferably in the range from 20 to 40%.
- Fall tube (12) according to any one of the preceding claims, characterized in that the overall length of the air-permeable walls (32, 42, 44, 46) is not more 50% of the overall length of the walls of the fall tube.
- Fall tube (12) according to any one of the preceding claims, characterized in that the flow cross section is rectangular and only one wall of the wall structure is provided with one or more air-permeable sections (32, 42, 44, 46).
- Fall tube (12) according to any one of the preceding claims, characterized in that the air-permeable, or at least one air-permeable, section (32, 42, 44, 46) is in flow connection with an aspirator (50).
- Fall tube (12) according to claim 6, characterized in that means (D1, D2, D3) are provided for influencing the flow between the wall section (42, 44, 46) and aspirating means (V).
- Fall tube (12) according to claim 6 or 7, characterized in that there are a plurality of air-permeable sections (32, 42, 44, 46) and at least two air-permeable sections (32, 42, 44, 46) are in flow connection with the aspirator (50).
- Fall tube (12) according to any one of the preceding claims, characterized in that the ends are open and the shaft cross section changes monotonously over the length of the shaft.
- Fall tube (12) according to any one of the preceding claims, characterized in that the fall tube (12) has a rectangular cross section and at least two opposite walls converge over the entire length of the tube.
- Fall tube (12) according to claim 10, characterized in that the walls converge monotonously.
- Fall tube (12) according to claim 10, characterized in that the walls have at least two sections having different angles of convergence.
- Fall tube (12) according to any one of the preceding claims, characterized in that a quench chamber (10) adjoins at the end having the larger flow cross section.
- Fall tube (12) according to claim 13, characterized in that there are no nonmonotonous changes in the flow cross section at transition from the quench chamber (10) to the fall tube or shaft (12).
- Fall tube (12) according to claim 13 or 14, characterized in that the quench chamber (10) has operating doors having a porosity of not more than 20% and preferably in the range from 4 to 8%.
- Fall tube (12) according to claim 15, characterized in that the free flow openings are distributed over the entire area of the operating doors.
- Quench chamber (10) characterized by operating doors having a porosity of not more than 20% and preferably in the range from 4 to 8%.
- Quench chamber (10) according to claim 17, characterized in that the free flow openings are distributed over the entire area of the operating doors.
- Process for spinning a filament strand (22, 24) from a melt which, after filament formation, solidifies in a cooling shaft, cooling air being added to the filaments in a first shaft section (10), being accelerated by the filaments in the direction of movement of the filament bundle and subsequently being further conducted through a further shaft section (a fall tube) (12) together with the filament bundle to the shaft exit (34), the flow cross section gradually constricting in the direction of flow, via at least a part of the further shaft section, characterized in that air escapes from the shaft before the shaft exit (34), the exiting air rate being adjusted such that there is a slight overpressure at all places in the vicinity of the walls of the fall tube.
- Process according to claim 19, characterized in that between the first shaft section and the exit no air is added to the filaments.
- Process according to claim 19 or 20, characterized in that air exiting from the shaft is aspirated by means of a ventilator (V) and at most is returned as cooling air.
- Process according to any one of the preceding claims 19 to 20, characterized in that the air velocity at the point of exit does not exceed 7 m/sec.
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DE102005042634A DE102005042634A1 (en) | 2005-09-07 | 2005-09-07 | Method and device for producing filament yarns by melt spinning |
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KR (1) | KR20070028257A (en) |
CN (1) | CN1928168A (en) |
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CN102162146A (en) * | 2011-04-14 | 2011-08-24 | 张家港保税区炬德化纤有限公司 | Exhaust device for cooling melt yarns |
JP2014145132A (en) | 2013-01-25 | 2014-08-14 | Tmt Machinery Inc | Spinning and winding device |
CN104831378B (en) * | 2015-04-09 | 2017-05-31 | 无锡金通化纤有限公司 | The device and method of removal fiber strand silk surface low molecule attachment |
CN106400141B (en) * | 2016-11-15 | 2019-05-07 | 东华大学 | A kind of static pressure melt spinning device |
CN113774499A (en) * | 2021-05-31 | 2021-12-10 | 浙江盛元化纤有限公司 | Fiber-splitting female yarn spinning device capable of independently adjusting temperature of cooling air and fiber-splitting female yarn cooling method |
CN113758579B (en) * | 2021-09-26 | 2024-01-09 | 中国纺织科学研究院有限公司 | Method for detecting temperature of spinning assembly and spinning equipment |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL272966A (en) * | 1961-01-09 | |||
GB1034166A (en) * | 1963-11-08 | 1966-06-29 | Du Pont | Yarn-quenching apparatus |
GB1112725A (en) * | 1966-07-18 | 1968-05-08 | Du Pont | Apparatus for cooling textile filaments |
CH468482A (en) * | 1967-05-01 | 1969-02-15 | Inventa Ag | Device for preventing air turbulence in the spinning shaft |
DE4104404A1 (en) | 1990-02-22 | 1991-08-29 | Barmag Barmer Maschf | Air-cooling of filament extrusion - using interior pressure to avoid atmospheric influence on characteristics |
CA2040133A1 (en) * | 1990-05-11 | 1991-11-12 | F. Holmes Simons | Spinning process for producing high strength, high modulus, low shrinkage synthetic yarns |
DE19514866A1 (en) | 1994-05-02 | 1995-11-09 | Barmag Barmer Maschf | Improved spinning chimney for spinning synthetic multifilament yarn |
JPH10158920A (en) * | 1996-11-19 | 1998-06-16 | Toray Eng Co Ltd | Fiber-cooling device |
DE19915762A1 (en) | 1999-04-08 | 2000-10-12 | Lurgi Zimmer Ag | Cooling system for filament bundles |
DE10031106A1 (en) * | 1999-07-02 | 2001-01-04 | Barmag Barmer Maschf | Melt spinning of filaments involves controlling the rate of cooling air flow according to the air temperature rise in cooling chimney |
DE10031105A1 (en) * | 1999-07-02 | 2001-01-04 | Barmag Barmer Maschf | Melt spinning of filaments involves diverting some cooling air before yarn enters cylindrical section of spinning chimney |
DE10046611A1 (en) * | 1999-09-21 | 2001-03-29 | Barmag Barmer Maschf | Melt spun filament group cooling equipment, has an air conditioning unit in the closed coolant circuit formed by cooling shafts and coolant flow producer |
JP2004323989A (en) * | 2003-04-22 | 2004-11-18 | Toray Ind Inc | Method for spinning fibers comprising thermoplastic resin and cooling device |
DE10323532A1 (en) | 2003-05-24 | 2004-12-09 | Saurer Gmbh & Co. Kg | Melt spin unit for producing thermoplastic polymer fibres, comprises a fibre cooling unit between a spin head and a winding unit, with a blower chamber and fibre shaft |
-
2005
- 2005-09-07 DE DE102005042634A patent/DE102005042634A1/en not_active Withdrawn
-
2006
- 2006-09-01 AT AT06018300T patent/ATE510050T1/en active
- 2006-09-01 EP EP06018300A patent/EP1762644B1/en active Active
- 2006-09-06 CN CNA2006101281826A patent/CN1928168A/en active Pending
- 2006-09-07 KR KR1020060085971A patent/KR20070028257A/en not_active Application Discontinuation
- 2006-09-07 WO PCT/CH2006/000479 patent/WO2007028269A1/en active Application Filing
Also Published As
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DE102005042634A1 (en) | 2007-03-08 |
WO2007028269A1 (en) | 2007-03-15 |
KR20070028257A (en) | 2007-03-12 |
CN1928168A (en) | 2007-03-14 |
ATE510050T1 (en) | 2011-06-15 |
EP1762644A1 (en) | 2007-03-14 |
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