WO2022157048A1 - Device for melt spinning and cooling a freshly extruded filament bundle - Google Patents
Device for melt spinning and cooling a freshly extruded filament bundle Download PDFInfo
- Publication number
- WO2022157048A1 WO2022157048A1 PCT/EP2022/050542 EP2022050542W WO2022157048A1 WO 2022157048 A1 WO2022157048 A1 WO 2022157048A1 EP 2022050542 W EP2022050542 W EP 2022050542W WO 2022157048 A1 WO2022157048 A1 WO 2022157048A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- air
- cooling
- filament
- cylinder
- cooling cylinder
- Prior art date
Links
- 238000000048 melt cooling Methods 0.000 title claims abstract description 18
- 238000002074 melt spinning Methods 0.000 title claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 98
- 238000009987 spinning Methods 0.000 claims abstract description 11
- 238000009826 distribution Methods 0.000 claims description 20
- 238000004378 air conditioning Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000035699 permeability Effects 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 abstract description 5
- 238000011161 development Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
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
-
- 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
- D01D4/00—Spinnerette packs; Cleaning thereof
- D01D4/02—Spinnerettes
- D01D4/025—Melt-blowing or solution-blowing dies
-
- 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 an apparatus for melt-spinning and cooling a freshly extruded filament sheet according to the preamble of claim 1.
- a generic device for melt spinning and cooling a freshly extruded filament sheet is known from DE 102020 109250 A1.
- the spinneret unit In the manufacture of synthetic filament yarns, it is known to feed a molten polymer to a spinneret assembly.
- the spinneret unit is held on the underside of a heated spinning beam, which usually carries several spinneret units next to one another as well as a melt distribution system and a spinning pump.
- the spinneret unit has several components to guide the polymer melt filtered to a nozzle plate.
- the nozzle plate has a large number of nozzle openings through which fine filament strands are extruded.
- the freshly extruded filament strands are then cooled below their solidification temperature, preferably by a stream of cooling air, in order to then be combined to form a thread.
- a cooling cylinder with an air-permeable Significant cylinder wall arranged within an air chamber.
- the cooling cylinder here has a filament inlet and a filament outlet in order to guide the freshly extruded filament sheet through.
- a hollow-cylindrical cylinder section with an airtight wall is arranged, which forms a zone below the spinneret unit, which shields the cooling air from the filaments.
- the cooling cylinder has a locking ring on the circumference and that the locking ring with a circumferential web encloses the cylinder wall over a partial length in a jacket-like manner in such a way that air passage is prevented.
- the invention is characterized in that the cooling cylinder can be used directly to create a section in which the filament strands ge are not exposed to any cooling air.
- the locking ring encloses the cylinder wall with a circumferential web over a partial length in such a way that air passage through the cylinder wall is prevented. This creates a zone inside the cooling cylinder that is created by the locking ring and in which the filament strands are not cooled.
- the development of the invention is particularly advantageous, in which the locking ring is optionally assigned to the filament inlet of the cooling cylinder or the filament outlet of the cooling cylinder.
- the locking ring is associated with the filament inlet of the cooling cylinder, a section without direct cooling is created immediately below the spinneret assembly.
- Such transition zones are also referred to in the art as a so-called shroud.
- the locking ring can advantageously be assigned to the filament outlet of the cooling cylinder.
- the length section on the cooling channel, in which the filament strands are cooled by cooling air, remains unchanged.
- the development of the invention is preferably designed in which the locking ring is designed to be adjustable on the cooling cylinder.
- the locking ring could be automatically guided into different positions via lifting cylinders.
- the peripheral web of the locking ring has a web height which reduces the permeability of the cylinder wall of the cooling cylinder by 10 to 15%. This allows length Realize cuts without cooling the filaments and length sections with cooling of the filaments in the usual range.
- the air chamber for supplying the cooling cylinder is connected to an air conditioning air generator or to a vacuum generator.
- conditioned cooling air can be directed via the cooling cylinder radially from the outside to the inside onto the filament strands, so that these flow out in the same direction as the filaments.
- cooling air is preferably sucked in via the filament outlet of the cooling cylinder and guided radially from the inside outwards into the air chamber on the cooling cylinder.
- a flow of cooling air is created counter to the running direction of the filaments, which in particular improves the cooling effect.
- the air chamber is assigned a coaxial lower air distribution chamber, in which the air chamber and the air distribution chamber are connected by a perforated plate, in which the air distribution chamber is in the Area of the filament outlet of the cooling cylinder is penetrated by a pipe socket and in which the air distribution chamber has a connection for the air conditioning air generator or a connection for the vacuum generator.
- the supply of the cooling air or the discharge of the used cooling air is routed via the air distribution chambers.
- the air distribution chamber is connected to the air chamber in the vertical direction via the perforated plate, so that no radially directed forced flow occurs in the air chamber due to the supply or discharge of cooling air.
- the device according to the invention for melt spinning and cooling a freshly extruded filament sheet is used for the production of threads and can be used for the production of threads with fine filament deniers up to Threads with thick filament deniers are used with an even cooling of the filament strands.
- FIG. 1 shows a schematic cross-sectional view of a first exemplary embodiment of the device according to the invention for melt-spinning and cooling a filament sheet
- FIG. 2 shows a schematic cross-sectional view of a further exemplary embodiment of the device according to the invention for melt-spinning and cooling a filament bundle
- FIG. 1 shows a schematic cross-sectional view of a first exemplary embodiment of the device according to the invention for melt-spinning and cooling a freshly extruded filament sheet.
- FIG. 1 only shows the essential components of the device according to the invention, which are important for explaining the invention. Since devices of this type for melt-spinning and cooling a freshly extruded filament sheet are well known, a complete representation is omitted.
- the exemplary embodiment shown in FIG. 1 has a spinneret unit 1, which carries a nozzle plate 1.1 with a large number of nozzle openings 1.2 on its underside.
- the spinneret unit 1 is held below a heated spinning beam 2 and has a melt inlet, not shown here, for receiving a polymer melt.
- a cooling cylinder 3 is arranged substantially coaxially to the nozzle plate 1.1.
- the cooling cylinder 3 has an upper filament inlet
- the cooling cylinder 3 extends with an air-permeable cylinder wall 3.3 within an air chamber 4.
- the air chamber 4 encloses the cooling cylinder 3 in the form of a jacket and is closed off from the environment with walls 4.1.
- the air distribution chamber 5 is penetrated by a pipe socket 6 which is coaxial to the cooling cylinder 3 and is directly connected to the filament outlet 3.2 of the cooling cylinder 3.
- the air distribution chamber 5 has a lateral air connection opening 8 which is coupled to an air connection 9 .
- a climate air generator 10 is connected to the air distribution chamber 5 via the air connection 9 .
- the air chamber 4 and the air distribution chamber 5 are usually designed to be adjustable in height. The upper side of the air chamber 4 is held against an underside of the spinning beam 2 below the spinneret 1 . Between the spinning beam 2 and the wall
- a locking ring 11 is assigned to the cooling cylinder 3 within the air chamber 4 .
- the locking ring 11 has a circumferential web 12 which surrounds the cooling cylinder 3 in the form of a jacket and encloses the cylinder wall 3.3 over a partial length in such a way that air passage is prevented.
- the locking ring 11 is assigned directly to the filament inlet 3.1 of the cooling cylinder 3.
- the locking ring 11 prevents air from entering the cooling cylinder 3 from the air chamber 4 with its peripheral web 12. This creates a zone directly at the filament inlet 3.1, in which no cooling air enters.
- FIG. 1 shows the device for melt spinning and cooling according to the invention in an operating situation in which a polymer melt is extruded through the spinneret unit 1 into a large number of filament strands 15 .
- the filament strands 15 are extruded through the nozzle openings 1.2 of the nozzle plate 1.1 and enter the cooling cylinder 3 via the filament inlet 3.1.
- an air-conditioning air admitted into the air chamber 4 penetrates continuously from the outside radially into the inside in order to strands 15 to cool.
- the entry of air-conditioning air into the cooling cylinder 3 is prevented by the locking ring 11 .
- a zone is thus formed directly below the spinneret 1 in which no active cooling of the filament strands 15 occurs.
- This transition zone which is also known in the art as a so-called shroud, thus enables a delayed cooling of the filament strands 15.
- a titer uniformity can be achieved.
- the locking ring 11 is adjustable. For example, if the take-off speed changes and the filament titer changes as a result, it may be necessary for the freshly extruded filaments to be cooled directly when they enter the filament inlet 3.1 of the cooling cylinder 3.
- the locking ring 11 is arranged in a lower position on the cooling cylinder 3 and assigned to the filament outlet 3.2.
- the locking ring 11 can be adjusted automatically by actuators or manually. Due to the displacement of the locking ring 11 to the filament outlet 3.2, the overall cooling section within the cooling cylinder 3 remains constant.
- the displacement of the locking ring 11 is shown in dashed lines in FIG.
- the height of the circumferential web 12 on the locking ring 11 is designed in such a way that an active cooling length of at least 85% to 90% is retained on a cooling cylinder 3 .
- a maximum of 15% of the cylinder wall 3.3 of the cooling cylinder 3 is covered by the circumferential web 12 of the locking ring 11 .
- FIG. 2 is identical to the embodiment according to FIG. 1 in terms of the structure of the device parts, so that only the differences are explained here and otherwise reference is made to the above description.
- the air distribution chamber 5 is connected to a vacuum generator 14 via the air connection 9 .
- a negative pressure is thus generated within the air distribution chamber 5 by the negative pressure generator 14, which is propagated into the air chamber 4 and leads to the intake of cooling air.
- the cooling air is introduced into the cooling cylinder 3 from the outside via the pipe socket 6 and the filament outlet 3.2.
- a flow of cooling air thus occurs counter to the running direction of the filament strands 15.
- the flows of cooling air are each indicated by arrows in FIGS.
- the pressure reversal in the air chamber 5 thus generates a flow of cooling air on the cooling cylinder 3 from the inside to the outside, so that the used cooling air collects in the air chamber 4 and is discharged via the air distribution chamber 5 .
- the locking ring 11 is assigned to the filament outlet 3.2 of the cooling cylinder 3.
- the cooling air sucked in via the filament outlet 3.2 is initially guided without deflection against the running direction of the filaments.
- the transition zone formed by the peripheral web 12 in the area of the filament outlet 3.2 thus leads to an increased cooling effect on the filament strands 15.
- a higher proportion of the cooling air is routed to the filament inlet 3.1 of the cooling cylinder 3, so that the filament strands 15 already cool when they enter the cooling cylinder 3 are actively cooled.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280008861.7A CN116685726A (en) | 2021-01-20 | 2022-01-12 | Apparatus for melt spinning and cooling freshly extruded filament bundles |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021000256.3A DE102021000256A1 (en) | 2021-01-20 | 2021-01-20 | Device for melt spinning and cooling a freshly extruded filament sheet |
DE102021000256.3 | 2021-01-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022157048A1 true WO2022157048A1 (en) | 2022-07-28 |
Family
ID=80122575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/050542 WO2022157048A1 (en) | 2021-01-20 | 2022-01-12 | Device for melt spinning and cooling a freshly extruded filament bundle |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN116685726A (en) |
DE (1) | DE102021000256A1 (en) |
WO (1) | WO2022157048A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3834847A (en) * | 1970-01-16 | 1974-09-10 | Du Pont | Open cell foam device for gas distribution in filament quenching chimneys |
US4529368A (en) * | 1983-12-27 | 1985-07-16 | E. I. Du Pont De Nemours & Company | Apparatus for quenching melt-spun filaments |
WO2000044967A1 (en) * | 1999-01-29 | 2000-08-03 | E.I. Du Pont De Nemours And Company | High speed melt spinning of fluoropolymer fibers |
JP2000345424A (en) * | 1999-06-08 | 2000-12-12 | Teijin Seiki Co Ltd | Melt spinneret pack and melt-spinning device |
DE102020109250A1 (en) | 2019-04-10 | 2020-10-15 | Oerlikon Textile Gmbh & Co. Kg | Process for melt spinning and cooling a wide variety of synthetic filaments |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1012184C2 (en) | 1999-05-28 | 2000-11-30 | Stork Screens Bv | Cooling device for cooling synthetic filaments. |
DE102011117458A1 (en) | 2011-11-02 | 2013-05-02 | Oerlikon Textile Gmbh & Co. Kg | Device for melt spinning and cooling of synthetic filaments |
-
2021
- 2021-01-20 DE DE102021000256.3A patent/DE102021000256A1/en active Pending
-
2022
- 2022-01-12 CN CN202280008861.7A patent/CN116685726A/en active Pending
- 2022-01-12 WO PCT/EP2022/050542 patent/WO2022157048A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3834847A (en) * | 1970-01-16 | 1974-09-10 | Du Pont | Open cell foam device for gas distribution in filament quenching chimneys |
US4529368A (en) * | 1983-12-27 | 1985-07-16 | E. I. Du Pont De Nemours & Company | Apparatus for quenching melt-spun filaments |
WO2000044967A1 (en) * | 1999-01-29 | 2000-08-03 | E.I. Du Pont De Nemours And Company | High speed melt spinning of fluoropolymer fibers |
JP2000345424A (en) * | 1999-06-08 | 2000-12-12 | Teijin Seiki Co Ltd | Melt spinneret pack and melt-spinning device |
DE102020109250A1 (en) | 2019-04-10 | 2020-10-15 | Oerlikon Textile Gmbh & Co. Kg | Process for melt spinning and cooling a wide variety of synthetic filaments |
Also Published As
Publication number | Publication date |
---|---|
CN116685726A (en) | 2023-09-01 |
DE102021000256A1 (en) | 2022-07-21 |
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