EP1725702A1 - Dispositif de filage par fusion et de refroidissement - Google Patents

Dispositif de filage par fusion et de refroidissement

Info

Publication number
EP1725702A1
EP1725702A1 EP05715675A EP05715675A EP1725702A1 EP 1725702 A1 EP1725702 A1 EP 1725702A1 EP 05715675 A EP05715675 A EP 05715675A EP 05715675 A EP05715675 A EP 05715675A EP 1725702 A1 EP1725702 A1 EP 1725702A1
Authority
EP
European Patent Office
Prior art keywords
cooling
screen cylinder
blowing
cooling air
opening
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.)
Granted
Application number
EP05715675A
Other languages
German (de)
English (en)
Other versions
EP1725702B1 (fr
Inventor
Markus Reichwein
Ulrich Enders
Roland Nitschke
Klaus Schäfer
Peter Senge
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 Textile GmbH and Co KG
Original Assignee
Saurer GmbH and Co KG
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 Saurer GmbH and Co KG filed Critical Saurer GmbH and Co KG
Publication of EP1725702A1 publication Critical patent/EP1725702A1/fr
Application granted granted Critical
Publication of EP1725702B1 publication Critical patent/EP1725702B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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

Definitions

  • the invention relates to a device for melt spinning and cooling a plurality of synthetic filaments according to the preamble of claim 1.
  • a large number of fine filament strands are extruded from a plastic melt through a spinneret.
  • the spinnerets have a plurality of nozzle bores in a specific arrangement and distribution on their undersides.
  • the freshly spun filament strands are cooled for the purpose of solidification.
  • a large number of the filament strands usually the filament strands extruded through the spinneret as a whole, are combined to form a multifilament thread, which is wound into a bobbin after further treatments at the end of the production process.
  • very fine threads or thicker threads can be produced.
  • the total titer of the thread results from the number of individual filament strands and the filament titer.
  • the quality of the thread is determined by the interaction of the filament properties. It is therefore known that in order to produce a high-quality yarn, each individual filament strand within the filament bundle must be treated as equally as possible in order to obtain the same structures and cross sections.
  • the formation of the filament strands is largely determined immediately after the extrusion by the cooling. It is known, for example, that the so-called cross-flow blowing, in which a cooling air flow oriented transversely to the thread running direction of the filament strands is generated and penetrates the filament bundle, is only suitable for filament strands with a spin titer of above 1 dpf (dtex per filament). With finer filament strands, on the one hand a higher filament density is achieved within the filament bundle, which leads to a leads to uneven penetration of the cooling air flow, and on the other hand causes a large deflection of the filament bundle caused by the cross-flow blowing, which lead to inadmissible titre fluctuations in the filament strands.
  • filaments with a spin titer of ⁇ ldpf are preferably cooled with radial blowing after extrusion.
  • radial blowing a cooling air flow which is generated uniformly from inside to outside or from outside to inside over the entire circumference of the radial bundle is used to cool the filaments.
  • cross-flow blowing is advantageously also suitable for cooling several filament bundles running in parallel.
  • a device is known from US Pat. No. 3,067,458 in which a screen cylinder for guiding the freshly extruded filament strands is provided directly below a spinneret in a cooling shaft.
  • the sieve cylinder has a gas-permeable jacket.
  • a U-shaped baffle is arranged at a distance from the gas-permeable jacket and has an opening on one side of the screen cylinder. The opening is connected to a cooling flow generator, through which a cooling air flow is blown into the opening transversely to the screen cylinder.
  • the filament strands enter the cooling shaft, in which a cross-directional cooling air flow is generated for further cooling of the filament strands.
  • the filament strands are gently cooled immediately after extrusion, so that the outer layers of the filament strands are pre-consolidated before the final cooling takes place through the transverse cooling air flow.
  • a slight improvement in the production of fine filament strands could be achieved, however an uneven flow to the filament strands was found within the screen cylinder, which led to fluctuations in titre in the filaments.
  • the invention is characterized in that a cooling air flow flowing transversely to the running direction of the filaments is advantageously brought to the screen cylinder in such a way that the cooling air enters essentially uniformly on the circumference of the screen cylinder.
  • the flow divider arranged in the blow opening prevents direct, direct blowing on the screen cylinder.
  • the cooling air flow is essentially blown into the space between the jacket of the screen cylinder and the guide plate, so that a flow around the screen cylinder is generated. This results in an even distribution of the cooling air over the entire jacket of the screen cylinder, so that the cooling air can enter the screen cylinder evenly through the gas-permeable jacket and hit the filaments.
  • the distribution of the cooling air can take place either through a flow divider or through several interacting flow dividers.
  • the flow divider can advantageously be formed by a plurality of arranged guide plates, which are preferably formed from two individual plates arranged at an angle to one another, are held in the middle of the blowing opening and extend essentially over the length of the screen cylinder. This creates a gentle division of the cooling air flow entering the blowing opening without significant turbulence formation.
  • the guide plates could be designed to be adjustable relative to one another in order to change the flow angle.
  • different inlet cross sections can be formed between the guide plate ends and the guide plate, which in particular influences the flow velocity in the space between the jacket of the screen cylinder and the guide plate.
  • the flow divider preferably has a passage opening in the center, through which part of the cooling air is passed directly to the screen cylinder.
  • a further partial air flow can thus be generated, which enables a further improvement in the uniformity of the cooling air distribution.
  • the passage opening can also be formed by several separate openings or by a perforated plate structure.
  • the device according to the invention can be used for various processes for cooling filament strands.
  • Methods are known in which the further cooling of the filament strands is carried out by a transverse cooling air flow or by a cooling air flow guided in the thread running direction.
  • the development of the invention is particularly advantageous to use, in which the screen cylinder is connected on the outlet side to the cooling shaft, which cooling shaft has a lower thread outlet at a distance from the screen cylinder having.
  • the development of the invention is preferred in which the screen cylinder is connected on the outlet side to a cooling tube which has a funnel-shaped inlet for narrowing the free flow cross section having. This enables special guidance and cooling of the filament strands to be achieved, which leads to higher production speeds and production outputs.
  • the cooling flow generator is preferably formed by a pressure chamber and a fan connected to the pressure chamber.
  • the pressure chamber can be connected directly to the blow opening or indirectly via a blow wall, which advantageously extends over the entire length of the cooling shaft and blows a transverse cooling air flow into the cooling shaft and the blowing opening.
  • a sealing device is advantageously provided on the inlet side of the screen cylinder, through which the screen cylinder is sealingly connected to a nozzle carrier of the spinneret.
  • the screen cylinders assigned to the spinnerets are advantageously held together with the guide plates on a carrier in the cooling shaft.
  • the carrier is preferably connected to the cooling shaft in a height-adjustable or exchangeable manner, so that the screen cylinders can be removed from the nozzle carrier of the spinnerets in a simple manner for the purpose of maintenance work on the spinnerets.
  • the carrier can optionally be equipped with additional cooling tubes which are each connected to the outlet sides of the screen cylinder. Different methods for cooling the filament strands of a device can thus be used.
  • the cooling shaft has a replaceable blow wall on the side facing the blow openings, which is connected to the pressure chamber.
  • the blowing wall can be exchanged for a cassette wall which has a cooling air opening in the area of the blowing opening and which is directly connected to the pressure chamber.
  • the device according to the invention can thus be used optionally for different cooling processes.
  • FIGS. 5 and 6 schematically show further exemplary embodiments of the device according to the invention for cooling several filament bundles
  • FIG. 1 to 3 show a first exemplary embodiment of the device according to the invention for cooling a filament bundle in several views.
  • 1 shows the exemplary embodiment in a longitudinal sectional view, in FIG. 2 in a cross-sectional view and in FIG. 3 in a partial view of the blowing opening.
  • the exemplary embodiment consists of a spinning device 1 and a cooling device 2.
  • the spinning device 1 has a spinning nozzle 3 which is held in a heatable nozzle holder 4.
  • the top of the spinneret 3 is connected to a melt line 5.
  • the melt line 5 leads to a spinning pump, which is not shown here.
  • the cooling device 2 is arranged below the spinning device 1.
  • the cooling device 2 has a cuboid cooling shaft 6.
  • a Dracldeammer 7 is formed, which is connected to a blower 9.
  • the pressure chamber 7 is connected to the cooling shaft 6 by a blowing wall 8.
  • the blowing wall 8 is designed to be gas-permeable, so that a cooling medium introduced into the pressure chamber 7 through the fan 9 is preferred.
  • wise cooling air flows through the blowing wall 8 transversely to the running direction of the filaments 16 in the cooling shaft 6.
  • a screen cylinder 10 with a gas-permeable jacket 19 is held immediately below the nozzle carrier 4.
  • the jacket 19 could be formed from a perforated plate, a sintered metal or a wire mesh.
  • a U-shaped baffle 11 is arranged at a distance from the jacket 19 of the screen cylinder 10.
  • the free legs of the guide plate 11 point in the direction of the blow wall 8 and form a blow opening 25 between them.
  • the screen cylinder 10 is partially enclosed by the guide plate 11, a semi-annular space 20 being formed between the screen cylinder 10 and the guide plate 11.
  • a current divider 12 is arranged between the free legs of the guide plate 11.
  • the current divider 12 is formed by two guide plates 13.1 and 13.2 arranged at an angle to one another.
  • the guide plates 13.1 and 13.2 extend over the entire height of the screen cylinder 10 and thus over the entire height of the guide plate 11.
  • the blower opening 25 is divided into a total of three partial openings by the flow divider 12. Between the free legs of the guide plate 11 and the free longitudinal sides of the guide plates 13.1 and 13.2 there are partial blow openings through which the cooling air flow passes directly into the intermediate space 20. Another partial blow opening is formed through the central passage opening 26 in the flow divider 12. Thus, through the flow divider 12 arranged in the blow opening 25, the cooling air flow entering the blow opening 25 is divided and guided into three partial air flows.
  • the screen cylinder 10, the guide plate 11 and the flow divider 12 are attached and held together on a carrier 15.
  • the carrier 15 is connected to the walls of the cooling shaft 6 via holding devices (not shown).
  • the carrier 15 is held on the underside of the nozzle carrier 4. Between the nozzle carrier 4 and the carrier 15, a sealing device 14 is provided on the upper side of the screen cylinder 10, by means of which an essentially pressure-tight connection of the screen cylinder 10 to the spinneret 3 is possible.
  • the screen cylinder 10 has a diameter that is preferably the same size or larger than the diameter of the spinneret 3.
  • a thread outlet 17 is formed in the lower region of the cooling shaft 6.
  • a thread guide 18 is associated with the thread outlet 17 and preferably cooperates with a preparation device (not shown here).
  • a preparation device not shown here.
  • the blowing wall 8 could preferably be designed as a closed wall in the lower region of the cooling shaft 6.
  • a polymer melt is fed to the spinneret 3 by a spinning pump, not shown here.
  • the melt is filtered in the spinneret 3 and extruded on the underside through a large number of nozzle bores to form a large number of filament strands 16.
  • the spin titer is preferably in the range from 0.2 dpf to 1 dpf.
  • a cooling air stream is blown into the cooling shaft 6 from the pressure chamber 7 via the blowing wall 8. In the upper area of the cooling shaft 6, part of the cooling air directly enters the blowing opening 25.
  • the flow divider 12 arranged in the blowing opening 25 divides the incoming cooling air flow into a total of three individual partial air flows and in some cases directly onto the jacket 19 of the Sieve cylinder 10 and for the most part in the space 20 between the jacket 19 and the guide plate 11.
  • the jacket 19 of the screen cylinder 10 is preferably formed from a wire mesh, so that a uniform entry and penetration of the cooling air flow can take place on the jacket 19 of the screen cylinder 10.
  • the cooling air entering the sieve cylinder 10 penetrates the filament bundle and leads to pre-cooling of the filament strands 16.
  • the filament strands 16 reach the free space of the cooling shaft 6 by means of a godet (not shown here).
  • the filament strands 16 pass directly through the cooling air stream flowing out from the blowing wall 8 transversely to the direction of the thread running.
  • the device according to the invention is therefore particularly suitable for cooling a large number of fine filament strands.
  • FIG. 4 shows a further exemplary embodiment of the device according to the invention in a longitudinal sectional view. To explain this, the components with the same function have been given identical reference symbols.
  • the spinning device 1 is identical to the previous exemplary embodiment, so that reference is made to the preceding description.
  • the cooling device consists of a cooling shaft 6, in which a screen cylinder 10 is held directly on the underside of the nozzle carrier 4.
  • the Siebzy- Linder 10 has a gas-permeable jacket 19, preferably made of a wire mesh or a sieve.
  • a guide plate 11 and a flow divider 12 are assigned to the screen cylinder 10.
  • the structure of the screen cylinder 10, the guide plate 11 and the flow divider 12 is identical to the previous exemplary embodiment, so that reference is made to the preceding description at this point.
  • the blow opening 25 formed by the guide plate 11 is connected directly to a pressure chamber 7 via a cooling air opening 23.
  • the pressure chamber 7 is connected to a blower 9.
  • a cooling tube 21 is connected to the outlet side of the screen cylinder 10.
  • the cooling tube 21 has a funnel-shaped inlet 22 which is connected directly to the screen cylinder 10 within the cooling shaft 6.
  • the cooling tube 21 has a thread outlet 17 which is located outside the cooling shaft 6.
  • a thread guide 18 is assigned to the thread outlet 17.
  • a sealing device 14 is arranged between the nozzle carrier 4 of the spinning device 1 and the sieve cylinder 10, the carrier 15 of the sieve cylinder 10 being held directly on the nozzle carrier 4.
  • the sealing device 14 prevents the influence of external air from the cooling shaft 6 for cooling the filament strands.
  • the fiisch-extruded filament strands 16 are first cooled in the screen cylinder 10.
  • a cross-directional cooling air flow is blown through the cooling air opening 23 into the blowing opening 25.
  • the flow divider 12 divides the cooling air flow for uniformity, so that the cooling air enters over the entire jacket 19 of the screen cylinder 10.
  • the filament strands 16 are first precooled in the screen cylinder 10.
  • the filament strands 16 are then combined with the cooling air into the cooling pipe 21 connected on the outlet side of the screen cylinder 10.
  • the cooling of the filament strands 16 is continued in the cooling tube 21, the cooling air flow preferably being accelerated in the upper region of the cooling tube 21. Processes of this type are distinguished in particular by increased production outputs and production speeds in the production of synthetic fibers.
  • FIG. 5 shows an exemplary embodiment of the device according to the invention, by means of which a total of six threads can be spun and cooled simultaneously.
  • the structure of a spinning station essentially corresponds to the exemplary embodiment from FIG. 1, so that for the description of a spinning station reference is made to the description of FIG. 1.
  • spinnerets 3 are held in rows on a nozzle carrier 4. Each of the spinnerets 3 is connected via a melt line 5 to a spinning pump 27, which is designed as a multiple pump.
  • the cooling device 2 is arranged directly below the spinning device 1 and consists of a cooling shaft 6 which extends in a cuboid shape below the nozzle carrier 4.
  • the structure of the cooling shaft 6 essentially corresponds to the exemplary embodiment according to FIG. 1, so that a transverse cooling air flow for cooling the filament strands 16 is generated by a blowing wall.
  • 5 shows the device in a view parallel to the blowing wall. provides. The plane of the drawing corresponds to the level directly between the blowing wall and the blowing opening with a view of the blowing openings.
  • a carrier 15 is held directly on the underside of the nozzle carrier 4 by holding devices, not shown here.
  • Each spinneret 3 is assigned a screen cylinder 10, a sealing device 14 being held between the spinnerets 3 and the screen cylinder 10.
  • Each of the screen cylinders 10 has a baffle 11 and a flow divider 12.
  • the structure and arrangement of the guide plates and flow dividers is designed in accordance with the exemplary embodiments shown in FIG. 1.
  • the carrier 15 is held on both ends of the cooling shaft 6 in a guide 24 in such a way that the carrier 15 can be lowered by the holding device, for example in order to be able to carry out maintenance work on the spinnerets 3.
  • the guide 24 can also be designed such that the carrier 15 is held interchangeably.
  • the carrier 15 could be inserted in the form of a cassette in the cooling shaft.
  • the filament strands 16 In order to cool the filament strands 16, they are extruded in bundles through the spinnerets 3 and then fed into the respectively assigned screen cylinders 10. After pre-cooling in the screen cylinders 10, the filament bundles are cooled together in the lower region of the cooling shaft 6 by a transverse cooling air flow.
  • the selected number of the spinnerets held in the spinning device 1 is exemplary. In this way, 6, 8, 10 or even more threads can be cooled simultaneously in a cooling shaft 6.
  • FIG. 6 shows a further exemplary embodiment of the device according to the invention for melt spinning and cooling several filament bundles.
  • the exemplary embodiment is essentially identical to the exemplary embodiment according to FIG. 5, the cooling device 2 having a location structure, as was previously described for the exemplary embodiment according to FIG. 4.
  • Each spinneret 3 is assigned a screen cylinder 10 with a cooling tube 21 connected on the outlet side.
  • the air supply for all screen cylinders 10 takes place jointly via a cooling shaft 6.
  • a guide plate 11 and a flow divider 12 are assigned to the screen cylinders, as already described above.
  • the cooling tubes 21 are designed to be height-adjustable together with the carrier 15 in order to be able to carry out maintenance work on the spinnerets 3.
  • FIG. 4 With regard to the function for cooling the filament strands, reference is made to the description of FIG. 4.
  • FIGS. 1 to 6 are exemplary in the structure and arrangement of the individual components.
  • the design of the current divider shown is also exemplary.
  • the current divider can also advantageously be formed from a guide plate, which can be improved by certain shapes.
  • the passage opening in the flow divider could also be designed through a perforated plate structure, so that there are several openings.
  • the device according to the invention is particularly suitable for cooling microfilaments with a high number of filaments. Comparative tests with conventional cross-flow blowing have shown considerable improvements in the uniformity of the filament strands produced.
  • the device according to the invention can be used for any type of fiber production, irrespective of the respective polymer type or independently of the subsequent further treatments for producing the threads. LIST OF REFERENCE NUMBERS
  • cooling device • 2 cooling device 3 spinneret 4 nozzle holder 5 melt line 6 cooling shaft 7 pressure chamber 8 blow wall 9 blower 10 screen cylinder 11 guide plate 12 flow divider 13.1, 13.2 guide plate 14 sealing device

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

L'invention concerne un dispositif de filage par fusion et de refroidissement d'une pluralité de filaments synthétiques. Ce dispositif comprend une unité de filage et une unité de refroidissement, l'unité de filage présentant au moins une filière servant à l'extrusion des filaments. Un cylindre perforé, présentant une enveloppe perméable aux gaz, est placé dans une cuve de refroidissement, sous la filière, pour refroidir les filaments venant d'être extrudés. Un déflecteur en U, entourant partiellement l'enveloppe et formant d'un côté une ouverture de soufflage, est associé au cylindre perforé. L'ouverture de soufflage communique avec un générateur de courant de refroidissement qui insuffle de l'air de refroidissement, s'écoulant transversalement au sens de déplacement des filaments, dans l'ouverture de soufflage. L'objectif de l'invention est de permettre d'obtenir une répartition, la plus homogène possible, de l'air de refroidissement à la périphérie du cylindre perforé. A cet effet, un répartiteur d'écoulement est placé dans l'ouverture de soufflage pour répartir l'air de refroidissement pénétrant dans l'ouverture de soufflage avant son arrivée sur le cylindre perforé.
EP05715675A 2004-03-16 2005-03-03 Dispositif de filage par fusion et de refroidissement Not-in-force EP1725702B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004012715 2004-03-16
PCT/EP2005/002211 WO2005095683A1 (fr) 2004-03-16 2005-03-03 Dispositif de filage par fusion et de refroidissement

Publications (2)

Publication Number Publication Date
EP1725702A1 true EP1725702A1 (fr) 2006-11-29
EP1725702B1 EP1725702B1 (fr) 2012-08-22

Family

ID=34960925

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05715675A Not-in-force EP1725702B1 (fr) 2004-03-16 2005-03-03 Dispositif de filage par fusion et de refroidissement

Country Status (4)

Country Link
EP (1) EP1725702B1 (fr)
CN (1) CN1930329B (fr)
TW (1) TW200606287A (fr)
WO (1) WO2005095683A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009024994A1 (fr) * 2007-08-17 2009-02-26 Reliance Industries Limited Fils de filaments polymères continus ayant une uniformité de fibre améliorée avec une productivité accrue
DE202008015313U1 (de) 2008-09-16 2009-04-30 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum Abkühlen mehrerer synthetischer Filamentbündel
DE102010050394A1 (de) * 2009-11-06 2011-05-12 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum Abkühlen einer Vielzahl synthetischer Fäden
CN103328700B (zh) 2011-01-22 2016-08-31 欧瑞康纺织有限及两合公司 用于冷却大量合成丝线的装置
CN102925996A (zh) * 2012-04-10 2013-02-13 南京理工大学 采用特殊滚筒的静电成形方法
CN103374762B (zh) * 2012-04-26 2016-12-21 欧瑞康纺织技术(北京)有限公司 用于熔融纺丝和冷却合成长丝的设备
CN103014887A (zh) * 2012-12-12 2013-04-03 苏州龙杰特种纤维股份有限公司 一种制备海岛纤维的涡轮式冷却装置
TWI568900B (zh) * 2014-07-15 2017-02-01 台灣玻璃工業股份有限公司 成型板及其應用之纖維製作機台
CN106868612A (zh) * 2017-03-28 2017-06-20 苏州市朗润纺织科技有限公司 纺丝冷却装置
CN108796205B (zh) * 2018-09-12 2023-08-04 珠海格力电工有限公司 一种退火线的风冷装置和退火方法

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US3067458A (en) * 1959-04-07 1962-12-11 Du Pont Melt spinning apparatus and process
US4529368A (en) * 1983-12-27 1985-07-16 E. I. Du Pont De Nemours & Company Apparatus for quenching melt-spun filaments
EP0826802B1 (fr) * 1996-08-28 2001-11-28 B a r m a g AG Procédé et dispositif de filature des fils multifilaments
JP3561101B2 (ja) * 1996-10-24 2004-09-02 帝人ファイバー株式会社 ポリエステル繊維の製造装置と製造方法

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Also Published As

Publication number Publication date
TW200606287A (en) 2006-02-16
EP1725702B1 (fr) 2012-08-22
CN1930329B (zh) 2010-05-05
WO2005095683A1 (fr) 2005-10-13
CN1930329A (zh) 2007-03-14

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