CA1325088C - Method and apparatus for cooling molten filaments in spinning apparatus - Google Patents
Method and apparatus for cooling molten filaments in spinning apparatusInfo
- Publication number
- CA1325088C CA1325088C CA000594757A CA594757A CA1325088C CA 1325088 C CA1325088 C CA 1325088C CA 000594757 A CA000594757 A CA 000594757A CA 594757 A CA594757 A CA 594757A CA 1325088 C CA1325088 C CA 1325088C
- Authority
- CA
- Canada
- Prior art keywords
- cooling
- coollng
- cooling air
- molten filaments
- upstream
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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
- 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
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
METHOD AND APPARATUS FOR COOLING MOLTEN
FILAMENTS IN SPINNING APPARATUS
ABSTRACT OF THE DISCLOSURE
A method for cooling molten filaments in a spinning apparatus where a plurality of molten filaments extruded from a die are cooled by cooling air blown out from a cooling apparatus and are taken up with a draft, wherein the temperature and/or volume of the cooling air blown from the cooling apparatus is controlled so that the cooling is performed stronger, in stages or continuously, from upstream to downstream.
FILAMENTS IN SPINNING APPARATUS
ABSTRACT OF THE DISCLOSURE
A method for cooling molten filaments in a spinning apparatus where a plurality of molten filaments extruded from a die are cooled by cooling air blown out from a cooling apparatus and are taken up with a draft, wherein the temperature and/or volume of the cooling air blown from the cooling apparatus is controlled so that the cooling is performed stronger, in stages or continuously, from upstream to downstream.
Description
1 3250~8 ::
METHOD AND APPARATUS FOR COOLING MOLTEN
FILAMENTS IN SPINNING APPARATUS
BACKGROUND OF THE INVENTION
1. Field of the Inventlon The present lnventlon relates to a method for -~
coollng a plurallty of molten fllaments comprlsed of a thermoplastlc resln extruded from dle and to an apparatus for ;
carrylng out the method.
METHOD AND APPARATUS FOR COOLING MOLTEN
FILAMENTS IN SPINNING APPARATUS
BACKGROUND OF THE INVENTION
1. Field of the Inventlon The present lnventlon relates to a method for -~
coollng a plurallty of molten fllaments comprlsed of a thermoplastlc resln extruded from dle and to an apparatus for ;
carrylng out the method.
2. Descriptlon of the Related Art In t~e cooling of molten filaments, if the temperature of the coollng alr 1~ lowered or the alr flow rate ls lncreased so as to rapldly cool the fllaments, only the surface of ~ -the fllaments wlll be cooled and solldlfled. If a draft ls applled to the fllaments ln that state, the fllaments wlll melt --and break or the elastlclty, tenslle strength, and other physlcal propertles of the yarn wlll be lowered. Conversely, lf the - ~-fllaments are gradually cooled, the fllaments tend to adhere to each other and, further, the coollng zone must be made longer, and thus the slze of the apparatus 18 necessarlly lncreased.
Even lf the spinnlng speed ls lncreased or changed, lf the coollng ls carrled out wlthout changlng the length of the coollng zone, a rapld coollng becomes necessary, and thus the --problems dlscussed above wlll arise.
SUMMAR~ OF THE INVENTION
Accordlngly, an ob~ect of the present lnventlon 18 to obvlate the above-mentloned problems, caused by a too rapld or gradual coollng of the fllaments. -Other ob~ects and advantages of the present inventlon ~ ,' A :~
1 3250~8 wlll be apparent from the followlng descrlptlon.
In accordance wlth the present lnventlon, there ls provlded a method of coollng molten fllaments ln a splnnlng apparatus, where a plurallty of molten fllaments extruded from a dle are cooled by coollng alr blown out from a coollng apparatus and are taken up wlth a draft, comprlslng controlllng the temperature of the coollng alr blown from the coollng apparatus so that the coollng effect 18 made weaker ln the upstream (top) reglon and stronger ln the downstream ~bottom) reglon, ln stages or contlnuously.
In accordance wlth the present lnventlon, there ls also provlded a coollng apparatus ln a splnnlng apparatus where a plurallty of molten fllaments extruded from B dle are cooled by coollng alr blown from a coollng apparatus and are taken up wlth a draft, and whereln a plurallty of coollng apparatuses with dlfferent temperatures or temperatures and volume~ of the coollng alr are connected ~o that the coollng ls performed stronger ln the downstream stages.
In a further embodlment, the lnventlon resldes ln a coollng apparatus ln a splnnlng apparatus where a plurallty of molten fllaments extruded from a dle are cooled by coollng alr blown from a coollng apparatus and are taken up wlth a draft, whereln there ls provlded a heater ln the flow path of the cooling alr wlth the pltch sf the heatlng wlres ls made closer upstream 80 as to gradually lncrease t~e amount of heat generated.
In a stlll further embodlment, the lnventlon resldes in a coollng apparatus ln a splnnlng apparatus where a plurallty of molten fllaments extruded from a dle are cooled by coollng alr ~ ~.
:, i .. : . . . . . . . ~ - . : . -: 1 325088 2a 70065-21 blown from a coollng apparatus and are taken up wlth a draft, whereln the flow path of the coollng alr ls formed so as to be gradually narrower ln the upstream dlrectlon or ls formed so as to ~ -gradually lncrease the pressure loss.
BRIEF DESCRIPTION OF THE DRAWINGS
~':
:`.;
'"'' :
-'.'' ' . ' . , .. ~,. .-, ,, . :..... . . . .: , .. . . .. , ',. ~ ' '':: ' . . ' : -. ' . ' ~ :' ' : .. , : . ~: : . ' . .
The present invention will be better understood from the description set forth below with reference to the accompanying drawings, in which:
Figure 1 is a schematic view of a spinning apparatus provided with a cooling apparatus according to a first embodiment of the present invention;
Fig. 2 is a schematic view of a spinning apparatus provided with another cooling apparatus; and Fig. 3 i5 a schematic view of a conventional 1~ spinning apparatus.
DESCRIPTION OF THE PREFERRED ENBODIMENTS
According to the present invention, the above-mentioned problems can be solved by controlling the temperature and/or volume of the cooling air 90 that the cooling is performed stronger, in stages or ~ -continuously, from upstream to downstream of the filament flow.
The easiest way to change the cooling in stages and the easiest in terms of control is to divide the cooling zone into several sections, a cooling apparatus is provided for each section, and the cooling by the apparatus is made stronger in the downstream direction.
To change the cooling continuously, it is possible to adopt, for example, a method of arranging a heater in the flow path of the cooling air, and the pitch of the heating wires is made closer in the upstream direction so as to gradually increase the amount of heat generated, whereby the cooling air is warmed by contact with the heater and then blown or a method of forming the flow path of the cooling air is gradually narrowed in the upstream direction or the pressure loss is gradually increased to gradually reduce the amount of air upstream of the filament flow.
Further, when changing the spinning speed is changed, the degree of strength of the cooling can be changed.
Although the temperature and volume of air for -~
-- : :. .- . . ., - :: ....... . - .: , .
..
coollng largely depend upon the materlals to be extruded, the temperature of the molten fllaments, and the extruslon rate, the temperature of the coollng alr ls preferably -20C to 140C, more preferably 0 to 100C, and the volume of the coollng alr to be blown ls preferably 2 to 40 m3/kg, more preferably 5 to 25 m3/kg. ;-The materlals to be extruded lnclude, for example, polyethylene, polypropylene and other thermoplastlc reslns.
The molten fllaments extruded from the die are cooled weakly at the upstream portlon of the coollng zone and strongly at the downstream portlon thereof. When the coollng ls weak, the temperature dlfference of the fllament surface and lnterlor is made small and the draft ls applled ln that state to ensure that, -a unlform draft ls applled, whereby the elastlclty, tenslle strength, and other physlcal propertle~ of the fllaments are lmproved, and meltlng and breaklng occur wlth dlfflculty.
Further, at the downstream slde where the fllaments are taken up, a strong coollng ls performed for solldlflcatlon, so adheslon between fllaments occurs wlth dlfflculty. Thus, lt ls posslble to make the coollng zone shorter than wlth gradual coollng of the whole.
If the splnnlng speed ls lncreased, lt ls posslble to avold rapld coollng by lncreaslng the ratlo of the weak coollng ln the coollng zone. Note that when the splnning speed ls reduced, there ls no problem lf the ratlos of the strength of the coollng are varled.
Flgure 3 shows a conventlonal splnnlng apparatus for fllaments comprlsed of polyethylene, polypropylene, or other thermoplastlc reslns. In thls apparatus, a plurality of molten ;~
~ . .
t` c ~
4a 70065-21 fllaments 2 extruded from a dle 1 are cooled by coollng alr blown from a coollng apparatus 3 and then taken up with a draft. The coollng apparatus 3 comprlses a chlmney 4 connected to a dle 1 ln a manner so as to surround the molten fllaments 2 and a gas temperature ad~ustment apparatus 5 composed of coolers. The -apparatus S cools the cooling air to the deslred temperature and the coollng alr ls fed to the chlmney 4 by a fan 6 and ls blown from the lnner perlpheral surface thereof through a fllter 7.
Reference numeral 8 ls an exhaust fan. . -Ernbodlments Flgure 1 shows a flrst embodlment of two-stage coollng apparatus accordlng to the present lnventlon, havlng the same construction as that of the coollng apparatus 3 provlded ln the splnnlng apparatus as shown ln Flg. 3 except for the fllter at the bottom of the coollng apparatus 3, l.e., ls comprised of a chlmney 12 and a gas temperature ad~ustment apparatus 13 comprlsed of coolers. The said apparatus sends the cooling air, cooled to a desired low temperature by the top stage gas temperature adjustment apparatus 13, to the chimney 12 by the fan 14 and connects this to a cooling appa~
ratus 11 so that it is blown out from the inside peripheral surface. It blows out relatively high temperature cooling air from the top stage and relatively low temperature cooling air from the bottom `
stage thus slowly cooling the molten filaments 2 at the top stage and rapidly cooling them at the bottom stage.
For example, when polyethylene is used, the preferable cooling conditions are as follows:
Top stage: 30C x 8 m3/kg Bottom stage: 10C x 8 m3/kg In the above-mentioned embodiment, the temperature of the cooling air blown out from the bottom stage is made lower than that at the top stage, but it is also possiblé to change the air amounts of the fans 6 and 14 so as to increase the amount of air of the bottom stage over the top stage and fur~her possible to change both the temperature and air amount of the top and bottom `
stages.
A typical example of the cooling condition when polyethlene is used i# as follows:
Top stage: 20~ x 4 m3/kg Bottom stage: 10C x 8 m3/kg The embodiment shown in Fig. 2 is comprised in the same way as the apparatus shown in Fig. 1 outside of the fact that the fan 6 in the apparatus shown in Fig. 1 is made an exhaust fan and the cooling air of the bottom stage is exhausted from the fan 16, heated by the heater 17, then blown out from the top stage. As a ~ -result, cooling air of a relatively higher temperature -is blown out from the top stage and cooling air of a relatively lower temperature is blown out from the bottom stage.
The above-mentioned embodiment shows an example .
~, , ', ' ' , 1,, ;' 1, . ,~, . ~ , , , -` 1 325~88 where two cooling apparatuses are connected for two-stage cooling, but in another embodiment three or more cooliny apparatuses may be connected for multi-stage cooling and in still another embodiment heating wires ma~ be wound around the internal peripheral surface of the chimney and the pitch made gradually closer upstream so as to heat the cooling air and give it a temperature gradient so that the temperature gradually falls dowr~stream, whereby the cooling can be made continuously stronger downstream. Further, in another embodiment, the flow path of the cooling air can be formed to be gradually narrower upstream or formed 80 that the pressure loss gradually increases, thereby gradually decreasing the amount of the cooling air upstream.
As mentioned above, according to the method of claim 1, the cooling is made performed weaker at the upstream side and stronger at the downstream side, thereby improving the elasticity, tensile strength, and :
other physical properties of the filaments without enlarging the apparatus and further making molten brea~age difficult and preventing mutual adhesion of filaments.
According to the method of claim 2, even if the spinning speed is changed to make it faster, the ratio of the weaker portion of the cooling at the cooling zone can be increased 80 as to avoid rapid cooling or elongation of the cooling zone.
In the cooling apparatus of claim 3, a plurality of ;
cooling apparatuses are connected so as to strengthen the cooling in stages downstream. -In the cooling apparatus of claim 4, the temperature of the cooling air can be given a temperature gradient descending in the downstream direction and the cooling can be made continuously stronger downstream.
In the cooling apparatus according to claim 5, the volume of the cooling air can be gradually increased . ~ . .
: - .:.;. . .-: .:: - . . . ., . - . : .: . ~ , : .
: ' ~ ' . : ' .'. ' ' ' ' ` ' ~ , :: ., ' ' .': . . . , '! . ' , ~- 1 325088 ~
downstream and thus the cooling can be made continuously stronger downstream.
:
Even lf the spinnlng speed ls lncreased or changed, lf the coollng ls carrled out wlthout changlng the length of the coollng zone, a rapld coollng becomes necessary, and thus the --problems dlscussed above wlll arise.
SUMMAR~ OF THE INVENTION
Accordlngly, an ob~ect of the present lnventlon 18 to obvlate the above-mentloned problems, caused by a too rapld or gradual coollng of the fllaments. -Other ob~ects and advantages of the present inventlon ~ ,' A :~
1 3250~8 wlll be apparent from the followlng descrlptlon.
In accordance wlth the present lnventlon, there ls provlded a method of coollng molten fllaments ln a splnnlng apparatus, where a plurallty of molten fllaments extruded from a dle are cooled by coollng alr blown out from a coollng apparatus and are taken up wlth a draft, comprlslng controlllng the temperature of the coollng alr blown from the coollng apparatus so that the coollng effect 18 made weaker ln the upstream (top) reglon and stronger ln the downstream ~bottom) reglon, ln stages or contlnuously.
In accordance wlth the present lnventlon, there ls also provlded a coollng apparatus ln a splnnlng apparatus where a plurallty of molten fllaments extruded from B dle are cooled by coollng alr blown from a coollng apparatus and are taken up wlth a draft, and whereln a plurallty of coollng apparatuses with dlfferent temperatures or temperatures and volume~ of the coollng alr are connected ~o that the coollng ls performed stronger ln the downstream stages.
In a further embodlment, the lnventlon resldes ln a coollng apparatus ln a splnnlng apparatus where a plurallty of molten fllaments extruded from a dle are cooled by coollng alr blown from a coollng apparatus and are taken up wlth a draft, whereln there ls provlded a heater ln the flow path of the cooling alr wlth the pltch sf the heatlng wlres ls made closer upstream 80 as to gradually lncrease t~e amount of heat generated.
In a stlll further embodlment, the lnventlon resldes in a coollng apparatus ln a splnnlng apparatus where a plurallty of molten fllaments extruded from a dle are cooled by coollng alr ~ ~.
:, i .. : . . . . . . . ~ - . : . -: 1 325088 2a 70065-21 blown from a coollng apparatus and are taken up wlth a draft, whereln the flow path of the coollng alr ls formed so as to be gradually narrower ln the upstream dlrectlon or ls formed so as to ~ -gradually lncrease the pressure loss.
BRIEF DESCRIPTION OF THE DRAWINGS
~':
:`.;
'"'' :
-'.'' ' . ' . , .. ~,. .-, ,, . :..... . . . .: , .. . . .. , ',. ~ ' '':: ' . . ' : -. ' . ' ~ :' ' : .. , : . ~: : . ' . .
The present invention will be better understood from the description set forth below with reference to the accompanying drawings, in which:
Figure 1 is a schematic view of a spinning apparatus provided with a cooling apparatus according to a first embodiment of the present invention;
Fig. 2 is a schematic view of a spinning apparatus provided with another cooling apparatus; and Fig. 3 i5 a schematic view of a conventional 1~ spinning apparatus.
DESCRIPTION OF THE PREFERRED ENBODIMENTS
According to the present invention, the above-mentioned problems can be solved by controlling the temperature and/or volume of the cooling air 90 that the cooling is performed stronger, in stages or ~ -continuously, from upstream to downstream of the filament flow.
The easiest way to change the cooling in stages and the easiest in terms of control is to divide the cooling zone into several sections, a cooling apparatus is provided for each section, and the cooling by the apparatus is made stronger in the downstream direction.
To change the cooling continuously, it is possible to adopt, for example, a method of arranging a heater in the flow path of the cooling air, and the pitch of the heating wires is made closer in the upstream direction so as to gradually increase the amount of heat generated, whereby the cooling air is warmed by contact with the heater and then blown or a method of forming the flow path of the cooling air is gradually narrowed in the upstream direction or the pressure loss is gradually increased to gradually reduce the amount of air upstream of the filament flow.
Further, when changing the spinning speed is changed, the degree of strength of the cooling can be changed.
Although the temperature and volume of air for -~
-- : :. .- . . ., - :: ....... . - .: , .
..
coollng largely depend upon the materlals to be extruded, the temperature of the molten fllaments, and the extruslon rate, the temperature of the coollng alr ls preferably -20C to 140C, more preferably 0 to 100C, and the volume of the coollng alr to be blown ls preferably 2 to 40 m3/kg, more preferably 5 to 25 m3/kg. ;-The materlals to be extruded lnclude, for example, polyethylene, polypropylene and other thermoplastlc reslns.
The molten fllaments extruded from the die are cooled weakly at the upstream portlon of the coollng zone and strongly at the downstream portlon thereof. When the coollng ls weak, the temperature dlfference of the fllament surface and lnterlor is made small and the draft ls applled ln that state to ensure that, -a unlform draft ls applled, whereby the elastlclty, tenslle strength, and other physlcal propertle~ of the fllaments are lmproved, and meltlng and breaklng occur wlth dlfflculty.
Further, at the downstream slde where the fllaments are taken up, a strong coollng ls performed for solldlflcatlon, so adheslon between fllaments occurs wlth dlfflculty. Thus, lt ls posslble to make the coollng zone shorter than wlth gradual coollng of the whole.
If the splnnlng speed ls lncreased, lt ls posslble to avold rapld coollng by lncreaslng the ratlo of the weak coollng ln the coollng zone. Note that when the splnning speed ls reduced, there ls no problem lf the ratlos of the strength of the coollng are varled.
Flgure 3 shows a conventlonal splnnlng apparatus for fllaments comprlsed of polyethylene, polypropylene, or other thermoplastlc reslns. In thls apparatus, a plurality of molten ;~
~ . .
t` c ~
4a 70065-21 fllaments 2 extruded from a dle 1 are cooled by coollng alr blown from a coollng apparatus 3 and then taken up with a draft. The coollng apparatus 3 comprlses a chlmney 4 connected to a dle 1 ln a manner so as to surround the molten fllaments 2 and a gas temperature ad~ustment apparatus 5 composed of coolers. The -apparatus S cools the cooling air to the deslred temperature and the coollng alr ls fed to the chlmney 4 by a fan 6 and ls blown from the lnner perlpheral surface thereof through a fllter 7.
Reference numeral 8 ls an exhaust fan. . -Ernbodlments Flgure 1 shows a flrst embodlment of two-stage coollng apparatus accordlng to the present lnventlon, havlng the same construction as that of the coollng apparatus 3 provlded ln the splnnlng apparatus as shown ln Flg. 3 except for the fllter at the bottom of the coollng apparatus 3, l.e., ls comprised of a chlmney 12 and a gas temperature ad~ustment apparatus 13 comprlsed of coolers. The said apparatus sends the cooling air, cooled to a desired low temperature by the top stage gas temperature adjustment apparatus 13, to the chimney 12 by the fan 14 and connects this to a cooling appa~
ratus 11 so that it is blown out from the inside peripheral surface. It blows out relatively high temperature cooling air from the top stage and relatively low temperature cooling air from the bottom `
stage thus slowly cooling the molten filaments 2 at the top stage and rapidly cooling them at the bottom stage.
For example, when polyethylene is used, the preferable cooling conditions are as follows:
Top stage: 30C x 8 m3/kg Bottom stage: 10C x 8 m3/kg In the above-mentioned embodiment, the temperature of the cooling air blown out from the bottom stage is made lower than that at the top stage, but it is also possiblé to change the air amounts of the fans 6 and 14 so as to increase the amount of air of the bottom stage over the top stage and fur~her possible to change both the temperature and air amount of the top and bottom `
stages.
A typical example of the cooling condition when polyethlene is used i# as follows:
Top stage: 20~ x 4 m3/kg Bottom stage: 10C x 8 m3/kg The embodiment shown in Fig. 2 is comprised in the same way as the apparatus shown in Fig. 1 outside of the fact that the fan 6 in the apparatus shown in Fig. 1 is made an exhaust fan and the cooling air of the bottom stage is exhausted from the fan 16, heated by the heater 17, then blown out from the top stage. As a ~ -result, cooling air of a relatively higher temperature -is blown out from the top stage and cooling air of a relatively lower temperature is blown out from the bottom stage.
The above-mentioned embodiment shows an example .
~, , ', ' ' , 1,, ;' 1, . ,~, . ~ , , , -` 1 325~88 where two cooling apparatuses are connected for two-stage cooling, but in another embodiment three or more cooliny apparatuses may be connected for multi-stage cooling and in still another embodiment heating wires ma~ be wound around the internal peripheral surface of the chimney and the pitch made gradually closer upstream so as to heat the cooling air and give it a temperature gradient so that the temperature gradually falls dowr~stream, whereby the cooling can be made continuously stronger downstream. Further, in another embodiment, the flow path of the cooling air can be formed to be gradually narrower upstream or formed 80 that the pressure loss gradually increases, thereby gradually decreasing the amount of the cooling air upstream.
As mentioned above, according to the method of claim 1, the cooling is made performed weaker at the upstream side and stronger at the downstream side, thereby improving the elasticity, tensile strength, and :
other physical properties of the filaments without enlarging the apparatus and further making molten brea~age difficult and preventing mutual adhesion of filaments.
According to the method of claim 2, even if the spinning speed is changed to make it faster, the ratio of the weaker portion of the cooling at the cooling zone can be increased 80 as to avoid rapid cooling or elongation of the cooling zone.
In the cooling apparatus of claim 3, a plurality of ;
cooling apparatuses are connected so as to strengthen the cooling in stages downstream. -In the cooling apparatus of claim 4, the temperature of the cooling air can be given a temperature gradient descending in the downstream direction and the cooling can be made continuously stronger downstream.
In the cooling apparatus according to claim 5, the volume of the cooling air can be gradually increased . ~ . .
: - .:.;. . .-: .:: - . . . ., . - . : .: . ~ , : .
: ' ~ ' . : ' .'. ' ' ' ' ` ' ~ , :: ., ' ' .': . . . , '! . ' , ~- 1 325088 ~
downstream and thus the cooling can be made continuously stronger downstream.
:
Claims (6)
1. A method of cooling molten filaments in a spinning apparatus, where a plurality of molten filaments extruded from a die are cooled by cooling air blown out from a cooling apparatus and are taken up with a draft, comprising controlling the temperature of the cooling air blown from the cooling apparatus so that the cooling effect is made weaker in the upstream (top) region and stronger in the downstream (bottom) region, in stages or continuously.
2. A method of cooling molten filaments as claimed in claim 1, which comprises changing the speed at which the filaments are spun by the spinning apparatus whereby the degree of strength of the cooling is changed.
3. A method of cooling molten filaments according to claim 1 which further comprises controlling the volume of the cooling air whereby the cooling effect is made weaker in the upstream (top) region and stronger in the downstream (bottom) region, in stages or continuously.
4. A cooling apparatus in a spinning apparatus where a plurality of molten filaments extruded from a die are cooled by cooling air blown from a cooling apparatus and are taken up with a draft, and wherein a plurality of cooling apparatuses with different temperatures or temperatures and volumes of the cooling air are connected so that the cooling is performed stronger in the downstream stages.
5. A cooling apparatus in a spinning apparatus where a plurality of molten filaments extruded from a die are cooled by cooling air blown from a cooling apparatus and are taken up with a draft, wherein there is provided a heater in the flow path of the cooling air with the pitch of the heating wires is made closer upstream so as to gradually increase the amount of heat generated.
6. A cooling apparatus in a spinning apparatus where a plurality of molten filaments extruded from a die are cooled by cooling air blown from a cooling apparatus and are taken up with a draft, wherein the flow path of the cooling air is formed so as to be gradually narrower in the upstream direction or is formed so as to gradually increase the pressure loss.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63-70915 | 1988-03-24 | ||
| JP63070915A JP2674656B2 (en) | 1988-03-24 | 1988-03-24 | Method and apparatus for cooling molten filament in spinning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1325088C true CA1325088C (en) | 1993-12-14 |
Family
ID=13445282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000594757A Expired - Fee Related CA1325088C (en) | 1988-03-24 | 1989-03-23 | Method and apparatus for cooling molten filaments in spinning apparatus |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0334604B2 (en) |
| JP (1) | JP2674656B2 (en) |
| KR (1) | KR960006931B1 (en) |
| CN (1) | CN1022581C (en) |
| AT (1) | ATE97704T1 (en) |
| AU (1) | AU625777B2 (en) |
| CA (1) | CA1325088C (en) |
| DE (1) | DE68910857T3 (en) |
| HK (1) | HK84794A (en) |
| NZ (1) | NZ228457A (en) |
Families Citing this family (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3941824A1 (en) * | 1989-12-19 | 1991-06-27 | Corovin Gmbh | METHOD AND SPINNING DEVICE FOR PRODUCING MICROFILAMENTS |
| DE29512001U1 (en) * | 1995-07-25 | 1995-10-05 | Inventa Ag | Blow wall for cooling melt-spinnable synthetic threads |
| EP0826802B1 (en) * | 1996-08-28 | 2001-11-28 | B a r m a g AG | Process and device for spinning multifilament yarns |
| DE19821778B4 (en) * | 1998-05-14 | 2004-05-06 | Ems-Inventa Ag | Device and method for producing microfilaments of high titer uniformity from thermoplastic polymers |
| KR100574180B1 (en) * | 1998-07-23 | 2006-04-27 | 바마크 악티엔게젤샤프트 | Spinning device and method for spinning a synthetic thread |
| US6444151B1 (en) * | 1999-04-15 | 2002-09-03 | E. I. Du Pont De Nemours And Company | Apparatus and process for spinning polymeric filaments |
| JP2002309431A (en) * | 2000-06-21 | 2002-10-23 | Toray Eng Co Ltd | Spinning apparatus |
| JP2002302862A (en) * | 2001-04-06 | 2002-10-18 | Mitsui Chemicals Inc | Method of producing nonwoven fabric and apparatus therefor |
| ATE381630T1 (en) * | 2002-02-28 | 2008-01-15 | Reifenhaeuser Gmbh & Co Kg | SYSTEM FOR THE CONTINUOUS PRODUCTION OF A SPUNNOVED WEB |
| ATE527402T1 (en) * | 2002-07-05 | 2011-10-15 | Api Inst | SPINNING PROCESS |
| AU2003281697A1 (en) * | 2002-07-26 | 2004-02-16 | Kolon Industries, Inc. | A high strength low shrinkage polyester drawn yarn, and a process of preparing for the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3070839A (en) * | 1958-12-24 | 1963-01-01 | Du Pont | Controlled quenching apparatus |
| LU44675A1 (en) * | 1962-11-15 | 1963-12-23 | ||
| JPS539293A (en) * | 1976-07-14 | 1978-01-27 | Ebara Corp | Method and apparatus for regenerating activated carbon |
-
1988
- 1988-03-24 JP JP63070915A patent/JP2674656B2/en not_active Expired - Lifetime
-
1989
- 1989-03-21 EP EP89302795A patent/EP0334604B2/en not_active Expired - Lifetime
- 1989-03-21 AT AT89302795T patent/ATE97704T1/en not_active IP Right Cessation
- 1989-03-21 DE DE68910857T patent/DE68910857T3/en not_active Expired - Fee Related
- 1989-03-22 AU AU31608/89A patent/AU625777B2/en not_active Ceased
- 1989-03-22 NZ NZ228457A patent/NZ228457A/en unknown
- 1989-03-23 CN CN89101766A patent/CN1022581C/en not_active Expired - Fee Related
- 1989-03-23 CA CA000594757A patent/CA1325088C/en not_active Expired - Fee Related
- 1989-03-24 KR KR1019890003689A patent/KR960006931B1/en not_active IP Right Cessation
-
1994
- 1994-08-18 HK HK84794A patent/HK84794A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0334604B1 (en) | 1993-11-24 |
| JP2674656B2 (en) | 1997-11-12 |
| AU3160889A (en) | 1989-09-28 |
| KR960006931B1 (en) | 1996-05-25 |
| KR890014793A (en) | 1989-10-25 |
| JPH01246408A (en) | 1989-10-02 |
| EP0334604A2 (en) | 1989-09-27 |
| EP0334604A3 (en) | 1990-03-14 |
| DE68910857T3 (en) | 1997-04-10 |
| EP0334604B2 (en) | 1996-11-27 |
| HK84794A (en) | 1994-08-26 |
| AU625777B2 (en) | 1992-07-16 |
| CN1022581C (en) | 1993-10-27 |
| CN1038135A (en) | 1989-12-20 |
| DE68910857D1 (en) | 1994-01-05 |
| NZ228457A (en) | 1991-11-26 |
| ATE97704T1 (en) | 1993-12-15 |
| DE68910857T2 (en) | 1994-03-17 |
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