EP1470272A2 - Procede de refroidissement de filaments file a chaud et dispositif de filature par fusion - Google Patents

Procede de refroidissement de filaments file a chaud et dispositif de filature par fusion

Info

Publication number
EP1470272A2
EP1470272A2 EP03734686A EP03734686A EP1470272A2 EP 1470272 A2 EP1470272 A2 EP 1470272A2 EP 03734686 A EP03734686 A EP 03734686A EP 03734686 A EP03734686 A EP 03734686A EP 1470272 A2 EP1470272 A2 EP 1470272A2
Authority
EP
European Patent Office
Prior art keywords
steam
cooling
steam generator
switched
filaments
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
EP03734686A
Other languages
German (de)
English (en)
Other versions
EP1470272B1 (fr
Inventor
Stefan Vogel
Jörg BOLDT
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 EP1470272A2 publication Critical patent/EP1470272A2/fr
Application granted granted Critical
Publication of EP1470272B1 publication Critical patent/EP1470272B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

Definitions

  • the invention relates to a method for cooling melt-spun filaments according to the preamble of claim 1 and a device for melt spinning a plurality of strand-like filaments according to the preamble of claim 8.
  • melt spinning a large number of strand-like filaments are extruded from a polymer melt through a large number of nozzle bores in a spinneret by means of a spinning device.
  • the freshly spun filament strands are cooled after exiting the spinning device in order to be combined as a thread or bundle of threads.
  • the cooling takes place by means of a cooling device which has a cooling shaft through which the filaments pass.
  • the cooling shaft is connected to a coolant source, which supplies a conditioned cooling air to the cooling shaft.
  • the cooling air is given a certain moisture content by the conditioning in order to obtain an intensive cooling of the filaments.
  • Such a method and device are known for example from EP 0046 571 A2.
  • the moisture content of the conditioned cooling air should have a constant humidity setpoint over time. However, this can only be ensured if there are no interruptions or faults in the conditioning of the cooling air, which can hardly be avoided in the known device by using a conditioning system.
  • the object is achieved by a method with the features of claim 1 and by a device with the features of claim 8.
  • the invention provides that the wet steam required for conditioning the cooling air is generated by a plurality of steam generators which are connected in parallel to the coolant source. This enables uniform and improved conditioning to be achieved. In addition, there is greater flexibility in the provision of steam.
  • the required amount of steam as well as the number of steam generators can be coordinated with one another in such a way that a minimum steam quantity is not undercut even when the steam generator is in partial operation.
  • the development of the invention according to claim 2 and claim 8 is particularly advantageous.
  • at least one of the steam generators is switched to an idle state during the conditioning of the cooling air.
  • the amount of steam required for conditioning is generated by the steam generators that are kept in the operating state.
  • the steam generator which is in the idle state can now be serviced or cleaned without influencing the amount of steam generated.
  • the switchover of the steam generators is carried out according to a predetermined sequence.
  • the steam generators are connected to a control device, which ensure that each of the steam generators is put into an idle state one after the other.
  • the steam generators can successively go through a rest phase for maintenance and cleaning without significant fluctuations in the generation of the required amount of steam.
  • the change to switch over the steam generator can advantageously be determined by a cycle time which results, for example, from the cleaning or maintenance cycle of the steam generator. This ensures that the amount of steam emitted by each steam generator is generated with high constancy during the operating state of the respective steam generator.
  • the method variant according to claim 7 is particularly advantageous for ensuring a constant amount of steam.
  • the steam generator when one of the steam generators is switched from the idle state to the operating state, the steam generator is run through a pre-run state in order, for example, in a warm-up phase to obtain the operating state required Approach steam generation. Only after the preliminary state has ended is the next steam generator in the sequence switched from the operating state to the idle state.
  • Fig. 1 shows schematically a device according to the invention for melt spinning a plurality of strand-like filaments
  • Fig. 2 shows schematically a circuit diagram for switching the steam generator shown in Fig. 1
  • the device 1 shows an exemplary embodiment of a device according to the invention for melt spinning a large number of strand-like filaments.
  • the device has a spinning device 1 and a cooling device 2 arranged directly underneath the spinning device 1.
  • the spinning device 1 contains a melt feed 3, which is connected, for example, to a melt source (not shown here), for example an extruder or a pump.
  • the melt feed 3 leads to a spinning head 4.
  • On the underside of the spinning head 4, one or more nozzle packs 5 are arranged, which contain a multiplicity of nozzle bores in order to extrude a multiplicity of strand-shaped filaments 6.
  • a cooling shaft 7 of the cooling device 2 is arranged below the nozzle packet 5 and surrounds the emerging filaments 6.
  • the cooling shaft 7 is connected via an air duct 8 to the outlet of a cooling fluid source 9.
  • the cooling fluid source 9 is supplied with fresh air via an air inlet 10 arranged opposite the air supply 8.
  • the cooling fluid source 9 is coupled to a plurality of steam generators 121, 122 and 123.
  • each of the steam generators 121, 121, 122 and 123 each connected in parallel to the cooling fluid source 9 through the separate steam line 111, 112 and 113.
  • the steam generators 121, 122 and 123 can be controlled via a control line 14 by a control device 13.
  • a conditioned cooling air is introduced into the cooling shaft 7 via the air supply 8 through the cooling fluid source 9.
  • the cooling fluid source 9 is supplied with fresh air on the one hand via the air inlet 10 and, on the other hand, the steam generated by the steam generators 121 and 122, for example 111 and 112, via at least two steam lines.
  • the fresh air is mixed with the wet steam and blown into the air supply 8 as conditioned cooling air, for example by a fan.
  • the steam generators 121, 122 or 123 can be designed, for example, as cylinders filled with water, in which the water is heated by means of electrical energy, for example directly through a power line in the water or according to the so-called immersion heater principle.
  • minerals accumulate in the remaining cylinder water over the course of the operating time. Mineral enrichment has a disruptive effect on steam generation. If the max. permissible mineral content, the steam generator can even be damaged. A cleaning process is required after a certain operating time of the steam generator. Here, the mineral content is reduced by the so-called cutting off. When the water is removed, it is drained from the steam generator and refilled with fresh water.
  • the steam generator 123 is switched from an operating state to a dysentery state by the control device 13, for example.
  • the cooling fluid source 9 is only supplied with wet steam by the steam generators 121 and 122 for conditioning the cooling air.
  • the control device 13 switches each of the steam generators 121, 122 or 123 from an operating state to the idle state and vice versa in a certain order.
  • 2 shows a circuit diagram for the steam generators 121, 122 and 123.
  • the horizontal line represents a time axis.
  • the steam generators 121, 122 and 123 can optionally be switched to an operating state B, a pre-running state V or an idle state R.
  • a respective desired amount of steam is generated by the respective steam generator and supplied to the cooling fluid source 9.
  • a preheating phase takes place after a water change in the respective steam generator in order to heat the steam generator to the required steam temperature.
  • the pre-run condition is always maintained after the idle state has ended before the steam generator is restarted.
  • the steam generator goes through the cleaning phase in which it can be switched off for maintenance. If one now starts on the time axis at the time to, the steam generation in order to provide the amount of wet steam for conditioning the cooling air is generated by the steam generators 121 and 123.
  • the steam generator 122 is switched to the idle state R and is ready for cleaning or maintenance.
  • the idle state R of the steam generator 122 has ended.
  • the steam generator 122 is switched to the pre-heating state V for preheating.
  • time t 2 there follows a switchover in such a way that the steam generator 122 is switched from the preliminary state V to the operating state B and at the same time the steam generator 121 from the operating state B to the idle state R.
  • the steam generator 121 goes through the idle state R and after Reaching the point in time t 3 the pre-run state V.
  • the required amount of steam is generated by the steam generators 122 and 123 for conditioning the cooling air.
  • the next switchover takes place, the steam generator 121 being switched back to the operating state B and the steam generator 123 being in the rest state R.
  • the cycle time T for switching the steam generator results from the equation:
  • the cycle time is constant in the exemplary embodiment shown in FIG. 2, so that a renewed switchover of the steam generator is initiated after each cycle time has elapsed.
  • the cycle time for switching the steam generator could be derived from a maximum operating time of a steam generator, after which cleaning of the steam generator is required.
  • the operating time of the steam generator according to the exemplary embodiment according to FIG. 2 would total twice the cycle time T.
  • a sensor 15 is provided in FIG. 1 at the outlet of the cooling fluid source 9, which is connected via a signal line 16 to the control device 13.
  • the moisture content of the conditioned cooling air can be detected by the sensor 15, for example.
  • the signaled measured value of the moisture content is subjected to an actual-target comparison and, depending on the difference, a switchover of the steam generator is initiated.
  • This process variant is particularly advantageous in order to achieve a high level of consistency in the conditioning of the cooling air. A high level of uniformity is achieved when the filaments cool, which results in very good constancy of the physical properties of the spun filaments.
  • the device according to the invention shown in FIG. 1 is only one exemplary embodiment.
  • the cooling fluid source could be connected to at least two steam generators or else to four, five or even more steam generators for conditioning the cooling air.

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 procédé de refroidissement de filaments filetés à chaud et un dispositif de filature par fusion d'une pluralité de filaments en écheveau. A cet effet, les filaments filetés à chaud par un dispositif de filature sont refroidis dans un dispositif de refroidissement par de l'air froid conditionné. Pour conditionner l'air froid, la vapeur saturée nécessaire est produite par plusieurs générateurs de vapeur qui sont montés en parallèle avec la source d'agent réfrigérant. Cela permet d'adapter le nombre des générateurs de vapeur aux besoins en volume de vapeur de telle façon qu'au moins un générateur de vapeur puisse être déconnecté aux fins de maintenance.
EP03734686A 2002-01-29 2003-01-23 Procede de refroidissement de filaments file a chaud et dispositif de filature par fusion Expired - Lifetime EP1470272B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10203296 2002-01-29
DE10203296 2002-01-29
PCT/EP2003/000632 WO2003064736A2 (fr) 2002-01-29 2003-01-23 Procede de refroidissement de filaments filetes a chaud et dispositif de filature par fusion

Publications (2)

Publication Number Publication Date
EP1470272A2 true EP1470272A2 (fr) 2004-10-27
EP1470272B1 EP1470272B1 (fr) 2008-04-23

Family

ID=27634736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03734686A Expired - Lifetime EP1470272B1 (fr) 2002-01-29 2003-01-23 Procede de refroidissement de filaments file a chaud et dispositif de filature par fusion

Country Status (6)

Country Link
US (1) US20040238997A1 (fr)
EP (1) EP1470272B1 (fr)
JP (1) JP2005516125A (fr)
CN (1) CN1324173C (fr)
DE (1) DE50309685D1 (fr)
WO (1) WO2003064736A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1710329B1 (fr) * 2005-04-07 2009-08-19 Oerlikon Textile GmbH & Co. KG Procédé et machine de filage et de refroidissement de filaments
EP2061919B1 (fr) * 2006-11-10 2013-04-24 Oerlikon Textile GmbH & Co. KG Procédé et dispositif pour un filage à l'état fondu et un refroidissement de filaments synthétiques

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB541238A (en) * 1940-04-17 1941-11-19 Henry Dreyfus Improvements in or relating to the manufacture of artificial textile materials and the like
FR1337210A (fr) * 1960-12-20 1963-09-13 Procédé et dispositif d'humidification de l'air, à effet instantané
US3115385A (en) * 1962-09-19 1963-12-24 Du Pont Quenching process
US3908605A (en) * 1974-11-01 1975-09-30 Charles M Andersen Automatic boiler blowdown apparatus and method
US4362682A (en) * 1980-08-21 1982-12-07 Badische Corporation Chip-free staple fiber process
US4502842A (en) * 1983-02-02 1985-03-05 Colt Industries Operating Corp. Multiple compressor controller and method
CH673659A5 (fr) * 1987-03-05 1990-03-30 Inventa Ag
JPH03137209A (ja) * 1989-10-23 1991-06-11 Kanebo Ltd 合成繊維の紡糸冷却方法及び装置
JPH0670300B2 (ja) * 1990-05-31 1994-09-07 米原 隆 無電界不織布成形法
US5193491A (en) * 1991-04-01 1993-03-16 Delaware Capital Formation, Inc. Cleaning system for boiler
FR2693789B1 (fr) * 1992-07-17 1994-10-07 Trouvay & Cauvin Ets Générateur de vapeur à cloisons poreuses.
CN1082123A (zh) * 1992-08-11 1994-02-16 中国科学院山西煤炭化学研究所 湿法含氟纤维的纺丝方法
JP4335987B2 (ja) * 1998-11-04 2009-09-30 ユニチカ株式会社 ポリ乳酸系マルチフィラメントの製造方法
DE10046611A1 (de) * 1999-09-21 2001-03-29 Barmag Barmer Maschf Vorrichtung zum Abkühlen einer Filamentschar
US6298656B1 (en) * 2000-09-29 2001-10-09 Siemens Westinghouse Power Corporation Compressed air steam generator for cooling combustion turbine transition section

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03064736A2 *

Also Published As

Publication number Publication date
EP1470272B1 (fr) 2008-04-23
WO2003064736A2 (fr) 2003-08-07
CN1324173C (zh) 2007-07-04
WO2003064736A3 (fr) 2004-04-22
CN1694980A (zh) 2005-11-09
DE50309685D1 (de) 2008-06-05
US20040238997A1 (en) 2004-12-02
JP2005516125A (ja) 2005-06-02

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