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
  • D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
  • D06B3/10—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics
  • D06B3/18—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics combined with squeezing, e.g. in padding machines
• • 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
  • D06B17/00—Storing of textile materials in association with the treatment of the materials by liquids, gases or vapours
  • D06B17/02—Storing of textile materials in association with the treatment of the materials by liquids, gases or vapours in superimposed, i.e. stack-packed, form; J-boxes

Definitions

• the invention relates to a method of continuously rinsing a dyed endless, round-knitted or stocking-shaped length of fabric, whereby the length of fabric is continuously advanced in a circumferential direction and alternate ⁇ ly subjected to a feeding of water and removal of water during a cycle being repeated, said feeding of water being carried out by way of a spray ⁇ ing thereon and only in such an amount that the length of fabric is soaked, and whereby the length of fabric after a stay period involving an absorp- tion in the water of dye and chemicals from the fibres of the fabric is advanced to a water expelling device where the dirty water is pressed out of the length of fabric.
• the invention relates furthermore to a plant for carrying out the method.
• Plants are known for dyeing knitwear. These are known under various names, viz. Haspelkufer, Jet-dying apparatuses, Jet-kufer, and Overflow- apparatuses depending on the way in which the article is transported and impregnated.
• the rinsing is traditionally performed in two different ways, viz. either by way of
• the apparatus By the overflow rinsing the apparatus is continuously fed with pure water for a predetermined period.
• the article is kept moving. Impurities or hydrolysed dye is admixed the water and removed at an overflow.
• the water consumption is very high as the efficiency is very low especially at the end of the process where the concentrations in the fabric and the bath approach one another. Therefore this method is replaced more and more by stepwise rinsing.
• the bath is drained periodically followed by a refilling with clean water. Then the fabric is moved in the bath until an almost balanced concentration has been obtained, whereafter the bath is again drained etc. This procedure is continued until the fabric is sufficiently clean.
• This method is, however, also very water-consuming. The latter is due to the fact that the textile retains a very large amount of the liquid at the draining of the bath. In connection with pure cotton it is a question of approximately 300% of the weight of the fabric.
• the dilution per change of bath is thus 3/10 and the water con ⁇ sumption 700 I per 100 kg of fabric.
• the use of 6 rinsing baths is not uncommon.
• the resulting theoretical dilution is 0.0007 at a water con ⁇ sumption of 4,200 I per. 100 kg.
• the necessary time involved is also extensive, viz. about 20 min/per change of bath. In connection with over ⁇ flow rinsing, the water consumption is typically 50 to 100% higher, whereas the necessary time is less.
• German Offenlegungsschrift No. 29 1 1 138 discloses a method of rinsing an endless length of fabric and of the type mentioned above.
• the length of fabric has, however, a tendency to fold, and the feeding of water is only carried out by way of spraying thereon from one side while the length of fabric passes a roller.
• the object of the present invention is to provide a method, whereby the pressing out of water and the feeding of water are carried out uniformly over the entire length of fabric in such a manner that the rinsing, if desired, can be carried out relatively quickly in the same plant as the one including the dyeing of the fabric.
• the latter is obtained by the endless length of fabric being straightened so as to substantially flatly abut driving rollers by means of air blowing means blowing air inwards through the side of the stocking-shaped length of fabric.
• the length of fabric is round-knitted or stocking-shaped, it is straightened so as to substantially flatly abut driving rollers by means of air blowing means blowing air inwards through the side of the stocking- shaped length of fabric in such a manner that folds and pleats are smoothed out.
• a plant for carrying out the method according to the invention comprises a plurality of driving rollers for continuously advancing the length of fabric and defining a substantially U-shaped advancing path for the length of fabric, said U-shaped advancing path extending below the driving rollers in such a manner that the length of fabric is carried downwards from the top through one leg of the U and around along the connecting portion and upwards again along the other leg of the U, where said plant comprises a plurality of co-operating rollers for pressing water out of the length of fabric and a plurality of spraying nozzles for spraying water on said length of fabric after the expelling of water.
• This plant is according to the inven- tion preferably provided with air nozzles for abutting one side of the length of fabric and blowing in air through said side and into the interior of the length of fabric in such a manner that folds and pleats are smoothed out and it is possible to press the water out in a uniform manner during the passing of the length of fabric of the pressing out rollers.
• the water spraying nozzles may particularly advantageously be arranged after the last driving roller before the length of fabric is advanced to the U-shaped advancing path therebelow with the result that water is not pressed out of the length of fabric until a suitable balancing of the concentration has entered the water, which must occur during the passage through the U-shaped advancing path.
• the plant shown in the drawing comprises a lower U-shaped, closed chan ⁇ nel 1 , the two legs of which communicate upwardly with a closed upper housing 2.
• This upper housing 2 is provided with two driving rollers 3 and 4 as well as an guide roller 5 ensuring that an endless length of fabric 6 is ensured a sufficiently long abutment over the driving rollers 3 and 4 during their movement in the direction indicated by means of an arrow 7.
• the guide roller 5 is associated with a displaceable roller 8, which by means not shown in greater detail is adapted to be manually or pneumatically or in another suitable manner pressed against said guide roller 5 during the rinsing process in such a manner that said guide roller and the displaceable roller 8 together operate as a water-expelling device designated the general reference numeral 9. At least one of the rollers forming part of the water- expelling device should be driven.
• the pressing of the displaceable roller 8 against the guide roller 5 may, if desired, be carried out by means of an adjustable force.
• a water-collecting vessel 10 is provided below the water-expelling device 9 formed by means of the guide roller 5 and the displaceable roller 8. said water-collecting vessel 10 carrying the water away through a pipe 1 1 and a valve 12.
• Water-spraying nozzles 13 and 14 are provided immediately adjacent the driving roller 4 on the side where the length of fabric 6 passes away from said driving roller 4 during its advancing movement, said water-spraying nozzles 13 and 14 being provided with water through respective pipes 15 and 16 from a pipe 17 and a valve 18 for cold water and a valve 19 for hot water. These water-spraying nozzles 13 and 14 are adapted to spray water out on their respective side of the endless length of fabric 6. The amount of water being sprayed can be adjusted by means of devices not shown in greater detail.
• a pivotally journalled so-called plaiting plate can be provided immediately after the last driving roller 4, said plate turning about an axis of rotation in a known manner and thereby allowing the length of fabric to be arranged with the shown sinuous shape while passing downwards into the U- shaped channel 1.
• the length of fabric 6 passes an air nozzle 23 being provided with air through a pipe 24 and a valve 25.
• the opening of the air nozzle 23 abuts one side of the length of fabric 6 and ensures thereby a spraying in of air into the interior of the length of fabric and consequently a smoothing out of folds and pleats.
• the length of fabric flatly abuts the succeeding rollers.
• An outlet is provided at the lowermost level of the U-shaped channel, and water optionally dripping off can be drained off through said outlet via a pipe 26 and a valve 27 with the result that no water remains in the U-- shaped channel during use of the plant.
• the plant shown can be used for dyeing endless lengths of fabric by means of suitable means not shown in greater detail for the sake of clarity.
• the rinsing process can be started. The latter is carried out by a con- tinued advancing of the length of fabric and activation of the pressing-out device 9.
• the amount of excess water is reduced to a water content in the articles of approximately 100%.
• water is allowed to be fed to the spray nozzles 13 and 14.
• the degree of change is 1 /3, and provided the oper ⁇ ation is run without a waste of water the water consumption amounts to 200 I per passage per 100 kg of article.
• the passing usually takes approxi ⁇ mately 3 min, and after passing 7 times the degree of dilution is 0.00004 and the water consumption so far is 1400 I.
• Cold or hot water can be used according to requirements by an adjustment of the valves 18 and 19.
• the displaceable roller 8 can for instance be adapted to co-operate with one of the driving rollers 3 and 4 instead of with the guide roller 5 so as to form a water-expelling device. It is also possible to increase the water-expelling effect by using a row of co-operat- ing squeezing rollers instead of using only one displaceable roller 8, where ⁇ by the length of fabric is more thoroughly processed.
• the expelling device can be adapted so as not to function during the dyeing process.
• the dye liquid pressed out can be carried through a pipe 28, a valve 29, a pump 30, and a heat exchanger 31 and back to the dye bath.
• the invention has been described in connection with a plant for contin ⁇ uously rinsing an endless length of fabric. It can, however, also be incor ⁇ porated in a plant for continuously treating long coherent lengths of fabric in plants where the length of fabric is carried by means of driving rollers from one dye bath to the next dye bath in a row of dye baths.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Treatment Of Fiber Materials (AREA)

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ID=8101667

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Cited By (1)

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Citations (6)

• 1995
  • 1995-10-04 WO PCT/DK1995/000396 patent/WO1996011296A1/en active Application Filing
  • 1995-10-04 AU AU36042/95A patent/AU3604295A/en not_active Abandoned
  • 1995-10-09 TW TW084110619A patent/TW313603B/zh active

Patent Citations (6)

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