CA1055267A - Apparatus for applying steam to a tow - Google Patents
Apparatus for applying steam to a towInfo
- Publication number
- CA1055267A CA1055267A CA253,306A CA253306A CA1055267A CA 1055267 A CA1055267 A CA 1055267A CA 253306 A CA253306 A CA 253306A CA 1055267 A CA1055267 A CA 1055267A
- Authority
- CA
- Canada
- Prior art keywords
- tow
- steam
- conduits
- slits
- housing
- 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
Links
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B5/00—Forcing liquids, gases or vapours through textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing impregnating
- D06B5/02—Forcing liquids, gases or vapours through textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing impregnating through moving materials of indefinite length
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
- D02J1/222—Stretching in a gaseous atmosphere or in a fluid bed
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
- D02J1/225—Mechanical characteristics of stretching apparatus
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
- D06C7/02—Setting
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Nonwoven Fabrics (AREA)
Abstract
APPARATUS FOR APPLYING STEAM TO A TOW
ABSTRACT OF THE DISCLOSURE
An apparatus for applying steam to a tow of filaments wherein a housing having an opening for the passage of the tow therethrough is provided with a plurality of steam conduits positioned in the housing and extending across the path of the tow. Each conduit is provided with a slit for directing steam through the tow at an angle of 30° to 75° to the path of the tow, with the slits in the conduits being so positioned that steam from some of the conduits flows countercurrent to the tow and steam from the other conduits flows concurrent with the tow. Preferably, the conduits are mounted in pairs with the tow passing therebetween and with the slit in one conduit of each pair being positioned to direct steam in a direction countercurrent to the direction of tow movement and the slit in the other conduit of the pair being positioned to direct steam in a direction concurrent to the direction of tow movement.
ABSTRACT OF THE DISCLOSURE
An apparatus for applying steam to a tow of filaments wherein a housing having an opening for the passage of the tow therethrough is provided with a plurality of steam conduits positioned in the housing and extending across the path of the tow. Each conduit is provided with a slit for directing steam through the tow at an angle of 30° to 75° to the path of the tow, with the slits in the conduits being so positioned that steam from some of the conduits flows countercurrent to the tow and steam from the other conduits flows concurrent with the tow. Preferably, the conduits are mounted in pairs with the tow passing therebetween and with the slit in one conduit of each pair being positioned to direct steam in a direction countercurrent to the direction of tow movement and the slit in the other conduit of the pair being positioned to direct steam in a direction concurrent to the direction of tow movement.
Description
C-14-53-0203 ~o55Z67 APPARATUS FOR APPLYING STEAM TO A TOW
Background Of The Invention a. Field of the Invention This invention relates to apparatus for applying steam to tow.
b. Description of the Prior Art The treatment of tows of filaments with steam for various reaso~s is known. For example, it is known to apply steam to tows of certain fila-ments for the purposes of heating and wetting the filaments so that the 10 filaments can be stretched, annealed or crimped. One method of apply-ing steam to a tow is to run the tow through a chamber containing steam, - the tow passing into and out of the chamber through openings at the ends - of the chamber. The disadvantage of this process is that penetration of the tow by the steam is not always sufficient to thoroughly heat all of the 15 filaments in the tow, especially where the tow contains many filaments - or is run at high speed.
Another method of treating the tow with steam is to advance the tow through a chamber and forward steam through the chamber either concurrent or countercurrent to the tow, as in U.S.P. 2,661,618. This 20 method suffers from the likelihood that steam penetration to the center of a very large tow will not be good, leaving the filaments at the center of the tow at a temperature below the te~nperature at which the tow treatment operation should be carried out.
Summary Of The Invention An apparatus for treating a tow of filaments with steam wherein a housing having a passageway extending therethrough for movement of the tow through the housing is provided with a plurality of steam conduits mounted in the housing and extending across the tow path. The steam conduits are provided with slits for directing steam through the tow at an angle of 30~ to 75 relative to the tow path, preferably at an angle of 40 to 50- . The slits in some ~f the steam conduits are positioned to direct the steam through the tow in a direction countercurrent to tow movement and the slits in the remaining steam conduits are positioned to direct steam through the tow in a direction concurrent with the tow movement. In a pre-ferred embodiment, the ste~un conduits are positioned in pairs on opposite sides of the tow with one of the conduits of each pair having the slit therein positioned to direct steam in a direction countercurrent to tow movement and the other conduit of the pair having the slit therein positioned to direct steam concurrent with tow movement.
Description ~f The Drawings Figure 1 is a fragmentary perspective view of a portion of the apparatus of this invention showing the relationship of the various parts of the apparatus.
Figure 2 is a longitudinal cross-sectional view of the apparatus showing the positioning of the steam tubes above and below the tow path and the positioning of the slits in the steam tubes.
Figure 3 is an enlarged cross-sectional view showing in more detail the arrangement of the various parts of the apparatus relative to
Background Of The Invention a. Field of the Invention This invention relates to apparatus for applying steam to tow.
b. Description of the Prior Art The treatment of tows of filaments with steam for various reaso~s is known. For example, it is known to apply steam to tows of certain fila-ments for the purposes of heating and wetting the filaments so that the 10 filaments can be stretched, annealed or crimped. One method of apply-ing steam to a tow is to run the tow through a chamber containing steam, - the tow passing into and out of the chamber through openings at the ends - of the chamber. The disadvantage of this process is that penetration of the tow by the steam is not always sufficient to thoroughly heat all of the 15 filaments in the tow, especially where the tow contains many filaments - or is run at high speed.
Another method of treating the tow with steam is to advance the tow through a chamber and forward steam through the chamber either concurrent or countercurrent to the tow, as in U.S.P. 2,661,618. This 20 method suffers from the likelihood that steam penetration to the center of a very large tow will not be good, leaving the filaments at the center of the tow at a temperature below the te~nperature at which the tow treatment operation should be carried out.
Summary Of The Invention An apparatus for treating a tow of filaments with steam wherein a housing having a passageway extending therethrough for movement of the tow through the housing is provided with a plurality of steam conduits mounted in the housing and extending across the tow path. The steam conduits are provided with slits for directing steam through the tow at an angle of 30~ to 75 relative to the tow path, preferably at an angle of 40 to 50- . The slits in some ~f the steam conduits are positioned to direct the steam through the tow in a direction countercurrent to tow movement and the slits in the remaining steam conduits are positioned to direct steam through the tow in a direction concurrent with the tow movement. In a pre-ferred embodiment, the ste~un conduits are positioned in pairs on opposite sides of the tow with one of the conduits of each pair having the slit therein positioned to direct steam in a direction countercurrent to tow movement and the other conduit of the pair having the slit therein positioned to direct steam concurrent with tow movement.
Description ~f The Drawings Figure 1 is a fragmentary perspective view of a portion of the apparatus of this invention showing the relationship of the various parts of the apparatus.
Figure 2 is a longitudinal cross-sectional view of the apparatus showing the positioning of the steam tubes above and below the tow path and the positioning of the slits in the steam tubes.
Figure 3 is an enlarged cross-sectional view showing in more detail the arrangement of the various parts of the apparatus relative to
2 5 each other.
lQ55267 Detailed Descri ption Of The Invention Referring now in detail to the drawings there is shown a tow steamer 10 made up of an upper channel 11 and a lower channel 12 S positioned in a facing relationship as shown in the drawings. Plates 13 and 14 welded in the channels 11 and 12 cooperate with the channels to form an upper steam chamber 18 and a lower steam chamber 19, respectively. Steam is admitted to the upper chamber 18 through an inlet line 20 and exhausted through line 20' ~Figure 2) while steam is admitted to the lower chamber 19 through an inlet 21-and exhausted through an outlet line 21 ' (Figure 2). The purpose of the steam chambers 18 and 19 is to assist in maintaining the space between the channels 11 and 12 at an elevated temperature.
An upper plate 24 welded to the upper channel 11 serves as the upper wall of a tow passageway 25 between the channels 11 and 12. A
lower plate 27 serves as the lower wall surface of the tow passageway through the apparatus. The plate 27 is held by screws 28 (Figure 3) to elongated bars 29 welded to the legs of the lower channel 12.
Figure 3 best shows the positioning of the plates 24 and 27 and the tow passageway 25 therebetween. Spacers 30 ~Figure 2) welded to the plate 13 and attached to the plate 24 by screws 31 assist in holding the plate 24 in position. The lower plate 27 is in a like manner secured to spacers welded to the plate 14.
The upper channel and its associated structure is pivotally attached to the lower channel by means of a pivot pin 34 (Figure 3) so that the upper channel 11 can be swung away from the lower channel for the lacing up of a tow of filaments 35. The legs of the upper channel 11 engage seals 36 secured to the bars 29 to seal the apparatus S against steam leakage along the sides thereof. A lockdown mechanism 39 of a conventional type (Figure 3) is provided for holding the upper ` channel 11 against the seals 36. A lever 40 attached to the upper channel 11 is provided for manually swinging the upper channel 11 away from the lower channel 12, with a counterweight 41 secured to 10 the upper channel 11 being provided for holding the upper channel 11 in a raised or open position.
The plates 24 and 27 are provided with rectangular openings 43 and 44, respectively, through which steam is admitted to contact the tow 35 passing through the apparatus. Associated with the open-ings 43 and 44 are steam tubes or conduits 46 and 47, respectively, which extend across the tow path and are provided with slits 48 and 49, respectively, for directing narrow jets of steam to and through the tow 35. Figure 2 best illustrates the positioning of the slits in the tubes 46 and 47. The slits are so positioned that the steam jets 20 engage the tow at an angle of 30 to 75 to the line of tow travel,with an angle of 40 to 50~ being preferred.
ln the preferred embodiment the steam tubes 46 and 47 are positioned in pairs with the tubes of each pair being aligned verti-cally so that one of the tubes is above the tow and the other is below.
25 The slit in one of the tubes of each pair is positioned to direct steam lQ552~;'7 in a direction concurrent to the direction of tow movement while the slit in the other conduit or tube of the pair is positioned to direct steam in a direction countercurrent to the tow move-ment. This insures that the steam flow from one tube will not interfere with and diminish the velocity of the stea~ flow from the other tube of the pair. It will be noted from Fi~ure 2 that the slits in the steam tubes at each end of the apparatus are so positioned that steam from these slits is directed toward the middle of the apparatus. In other words, the slits in the tubes at the upstream end of the apparatus are positioned to direct steam in a direction concurrent with tow movement while the sl~ts in the tubes at the exit end of the apparatus are positioned to direct steam in a direction countercurrent to tow movement.
Brackets 5Q at each end of the apparatus are provided with vertical puide pins 51 which serve to control the width of the tow and prevent the snacgin~ of filaments in the tow on the side walls of the apparatus.
In operation, tow is advanced through the apparatus and steam from a source 55 connected to tubes 46 and 47 is applied to the tow throu~h the slits in the tubes 46 and 47 as described above.
By applying steam to the tow in this manner virtually all of the steam condenses in the tow and thereby gives up its latent heat of vaporization to the filaments in the tow. Because of this, end seals on the apparatus to prevent steam leakage from the ends of the apparatus are unnecessary and very little steam escapes throu~h the open ends of the tow passageway 25. Penetration of the tow by the steam is most effective when the slits are positinned so that the steam passes through the tow at an an~le of 40 to 50 to the tow path.
C,14-53-0203 EXAMPLE
Wet-spun acrylic filaments collected intn a tow of 480,000 filaments averagin~ 3 denier per filament and at ambient temperature were heated to a hi~her temperature of the order of 8Q to 100C. by passa~e throu~h apparatus as illustrated in ~igures 1 to 3 of the drawin~ at the rate of 91.4 meters per minute, The overall outside dimensions of the apparatus were len~th 2.44 meters; width 22,8 centimeters and thickness 13.3 centimeters. The dimensions of the tow passa~eway 25 were len~th 2.44 meters; width 20 centimeters and hei~ht 2.54 centimeters.
The apparatus contained 24 steam conduits 46 and 47 discharging steam at a total rate of 524 kilograms per hour throu~h slits 48 and 49, said slits bein~ 21.9 centimeters lono and 0.08 centimeters wide. The tow emer~ing at the exit end of the passa~eway 25 was hot enouqh to be fed directly into a stuffer box crimper wherein a permanent crimp was imparted to the filaments,
lQ55267 Detailed Descri ption Of The Invention Referring now in detail to the drawings there is shown a tow steamer 10 made up of an upper channel 11 and a lower channel 12 S positioned in a facing relationship as shown in the drawings. Plates 13 and 14 welded in the channels 11 and 12 cooperate with the channels to form an upper steam chamber 18 and a lower steam chamber 19, respectively. Steam is admitted to the upper chamber 18 through an inlet line 20 and exhausted through line 20' ~Figure 2) while steam is admitted to the lower chamber 19 through an inlet 21-and exhausted through an outlet line 21 ' (Figure 2). The purpose of the steam chambers 18 and 19 is to assist in maintaining the space between the channels 11 and 12 at an elevated temperature.
An upper plate 24 welded to the upper channel 11 serves as the upper wall of a tow passageway 25 between the channels 11 and 12. A
lower plate 27 serves as the lower wall surface of the tow passageway through the apparatus. The plate 27 is held by screws 28 (Figure 3) to elongated bars 29 welded to the legs of the lower channel 12.
Figure 3 best shows the positioning of the plates 24 and 27 and the tow passageway 25 therebetween. Spacers 30 ~Figure 2) welded to the plate 13 and attached to the plate 24 by screws 31 assist in holding the plate 24 in position. The lower plate 27 is in a like manner secured to spacers welded to the plate 14.
The upper channel and its associated structure is pivotally attached to the lower channel by means of a pivot pin 34 (Figure 3) so that the upper channel 11 can be swung away from the lower channel for the lacing up of a tow of filaments 35. The legs of the upper channel 11 engage seals 36 secured to the bars 29 to seal the apparatus S against steam leakage along the sides thereof. A lockdown mechanism 39 of a conventional type (Figure 3) is provided for holding the upper ` channel 11 against the seals 36. A lever 40 attached to the upper channel 11 is provided for manually swinging the upper channel 11 away from the lower channel 12, with a counterweight 41 secured to 10 the upper channel 11 being provided for holding the upper channel 11 in a raised or open position.
The plates 24 and 27 are provided with rectangular openings 43 and 44, respectively, through which steam is admitted to contact the tow 35 passing through the apparatus. Associated with the open-ings 43 and 44 are steam tubes or conduits 46 and 47, respectively, which extend across the tow path and are provided with slits 48 and 49, respectively, for directing narrow jets of steam to and through the tow 35. Figure 2 best illustrates the positioning of the slits in the tubes 46 and 47. The slits are so positioned that the steam jets 20 engage the tow at an angle of 30 to 75 to the line of tow travel,with an angle of 40 to 50~ being preferred.
ln the preferred embodiment the steam tubes 46 and 47 are positioned in pairs with the tubes of each pair being aligned verti-cally so that one of the tubes is above the tow and the other is below.
25 The slit in one of the tubes of each pair is positioned to direct steam lQ552~;'7 in a direction concurrent to the direction of tow movement while the slit in the other conduit or tube of the pair is positioned to direct steam in a direction countercurrent to the tow move-ment. This insures that the steam flow from one tube will not interfere with and diminish the velocity of the stea~ flow from the other tube of the pair. It will be noted from Fi~ure 2 that the slits in the steam tubes at each end of the apparatus are so positioned that steam from these slits is directed toward the middle of the apparatus. In other words, the slits in the tubes at the upstream end of the apparatus are positioned to direct steam in a direction concurrent with tow movement while the sl~ts in the tubes at the exit end of the apparatus are positioned to direct steam in a direction countercurrent to tow movement.
Brackets 5Q at each end of the apparatus are provided with vertical puide pins 51 which serve to control the width of the tow and prevent the snacgin~ of filaments in the tow on the side walls of the apparatus.
In operation, tow is advanced through the apparatus and steam from a source 55 connected to tubes 46 and 47 is applied to the tow throu~h the slits in the tubes 46 and 47 as described above.
By applying steam to the tow in this manner virtually all of the steam condenses in the tow and thereby gives up its latent heat of vaporization to the filaments in the tow. Because of this, end seals on the apparatus to prevent steam leakage from the ends of the apparatus are unnecessary and very little steam escapes throu~h the open ends of the tow passageway 25. Penetration of the tow by the steam is most effective when the slits are positinned so that the steam passes through the tow at an an~le of 40 to 50 to the tow path.
C,14-53-0203 EXAMPLE
Wet-spun acrylic filaments collected intn a tow of 480,000 filaments averagin~ 3 denier per filament and at ambient temperature were heated to a hi~her temperature of the order of 8Q to 100C. by passa~e throu~h apparatus as illustrated in ~igures 1 to 3 of the drawin~ at the rate of 91.4 meters per minute, The overall outside dimensions of the apparatus were len~th 2.44 meters; width 22,8 centimeters and thickness 13.3 centimeters. The dimensions of the tow passa~eway 25 were len~th 2.44 meters; width 20 centimeters and hei~ht 2.54 centimeters.
The apparatus contained 24 steam conduits 46 and 47 discharging steam at a total rate of 524 kilograms per hour throu~h slits 48 and 49, said slits bein~ 21.9 centimeters lono and 0.08 centimeters wide. The tow emer~ing at the exit end of the passa~eway 25 was hot enouqh to be fed directly into a stuffer box crimper wherein a permanent crimp was imparted to the filaments,
Claims
1. An apparatus for applying steam to a tow, comprising:
(a) a housing having a passageway extending therethrough for the passage of a tow;
(b) a pair of plates secured in the housing in spaced relationship for serving as opposite walls of the passageway, said plates each having therein spaced openings;
(c) a plurality of steam conduits each associated with one of the openings in said plate, each of said conduits having therein a slit positioned to direct steam onto the tow at an angle of 30° to 75° relative to the direction of travel of the tow, the slits in the conduits on one side of the tow being positioned to direct steam in a direction concurrent to tow movement and the slits in the conduits on the oppo-site side of the tow being positioned to direct steam in a direction countercurrent to tow movement; and (d) a pair of steam chambers adjacent to the conduits for maintaining the temperature within the housing at an elevated value.
(a) a housing having a passageway extending therethrough for the passage of a tow;
(b) a pair of plates secured in the housing in spaced relationship for serving as opposite walls of the passageway, said plates each having therein spaced openings;
(c) a plurality of steam conduits each associated with one of the openings in said plate, each of said conduits having therein a slit positioned to direct steam onto the tow at an angle of 30° to 75° relative to the direction of travel of the tow, the slits in the conduits on one side of the tow being positioned to direct steam in a direction concurrent to tow movement and the slits in the conduits on the oppo-site side of the tow being positioned to direct steam in a direction countercurrent to tow movement; and (d) a pair of steam chambers adjacent to the conduits for maintaining the temperature within the housing at an elevated value.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US58139675A | 1975-05-27 | 1975-05-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1055267A true CA1055267A (en) | 1979-05-29 |
Family
ID=24325044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA253,306A Expired CA1055267A (en) | 1975-05-27 | 1976-05-26 | Apparatus for applying steam to a tow |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS51143785A (en) |
| CA (1) | CA1055267A (en) |
| DE (1) | DE2623671A1 (en) |
| IL (1) | IL49253A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0725177A4 (en) * | 1994-07-07 | 1996-12-27 | Komatsu Seiren Co | Apparatus for treating cloth |
| EP0725178B2 (en) * | 1995-01-31 | 2005-04-27 | Kurt Dr. Müller | Method and device for drying and shrinking of textile fabric |
| ITMI20130821A1 (en) * | 2013-05-21 | 2013-08-20 | M A E S P A | EQUIPMENT FOR IRONING FIBERS OF ACRYLICS IN A PRESSURE STEAM ATMOSPHERE AND AN AUTOMATIC ENTRY DEVICE FOR SUCH EQUIPMENT. |
| US10837129B2 (en) | 2015-06-16 | 2020-11-17 | M.A.E. S.P.A. | Apparatus for stretching acrylic fibres tows in a pressurised steam environment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5130198B2 (en) * | 1973-10-29 | 1976-08-30 |
-
1976
- 1976-03-19 IL IL49253A patent/IL49253A/en unknown
- 1976-05-26 JP JP51061059A patent/JPS51143785A/en active Pending
- 1976-05-26 CA CA253,306A patent/CA1055267A/en not_active Expired
- 1976-05-26 DE DE19762623671 patent/DE2623671A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| IL49253A0 (en) | 1976-05-31 |
| IL49253A (en) | 1979-09-30 |
| DE2623671A1 (en) | 1976-12-02 |
| JPS51143785A (en) | 1976-12-10 |
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