EP1581681A1 - Method and machine with rotating drum for the washing or dyeing treatment of textile articles - Google Patents
Method and machine with rotating drum for the washing or dyeing treatment of textile articlesInfo
- Publication number
- EP1581681A1 EP1581681A1 EP03786215A EP03786215A EP1581681A1 EP 1581681 A1 EP1581681 A1 EP 1581681A1 EP 03786215 A EP03786215 A EP 03786215A EP 03786215 A EP03786215 A EP 03786215A EP 1581681 A1 EP1581681 A1 EP 1581681A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drum
- treatment
- bath
- textile articles
- machine
- 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
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
- D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
- D06B3/30—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of articles, e.g. stockings
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
- D06F35/005—Methods for washing, rinsing or spin-drying
- D06F35/006—Methods for washing, rinsing or spin-drying for washing or rinsing only
Definitions
- the invention relates to a method for the washing or dyeing treatment of textile articles and to a machine with rotating drum for implementing this method.
- washing or dyeing treatment of textile articles is normally performed using rotating-drum machines.
- These machines essentially consist of a frame which supports a tank inside which a drum is rotated by suitable drive means, said drum receiving the textile articles to undergo the washing or dyeing treatment .
- the rotating drum has a plurality of through-holes through which the treatment bath contained in the tank flows .
- the rotating drum usually has inwardly directed longitudinal vanes which keep the textile articles in movement while the drum rotates.
- the washing or dyeing of the garments is performed during rotation of the drum by the action of the longitudinal vanes which lift the textile articles above the treatment bath and release them once they reach the top part of the rotating drum so that they fall by means of gravity into the treatment bath.
- the rotating-drum washing or dyeing machines of the known type mentioned above have the drawback that the mechanical action exerted on the textile articles by the impact against the bath during falling causes wear of the garments, in some cases to an unacceptable degree.
- a further drawback consists in the fact that, in order to perform effective treatment of the articles, it is necessary to adopt during operation bath ratios (understood as meaning the ratio between the weight of the textile articles and the weight of the treatment bath) which are fairly high, i.e. of about 1:10 to 1:30.
- Applicant of the present invention which performs the dyeing or washing treatment by immersing the textile articles in the bath while they are kept in contact with the side surface of the rotating drum by the centrifugal force and spraying them with the treatment bath when they emerge again from the bath during rotation of the drum.
- the treatment is performed by combining the spraying action with immersion of the garments in the treatment bath, while the garments remain constantly in contact with the rotating drum. This method eliminates falling of the garments into the bath, with the advantage of reducing considerably the degree of wear to which they are subject.
- the high speed of rotation of the drum which is decidedly greater than that used in the known art, increases the frequency of immersion and extraction of the garments into/from the bath per unit of time, improving the quality of the treatment.
- a first drawback consists in the fact that the bath which is sprayed encounters a varied resistance in the zones of the articles making contact with the side surface of the rotating drum where there are no holes and the zones of the articles positioned opposite the holes in the side surface of the rotating drum. In fact in the first case there is a greater tendency to retain the bath and this results in a non-uniform finish of the garment at the end of treatment.
- Another drawback consists in the fact that the presence of ducts for conveying and recirculating the bath to the spraying devices results in use of part of the overall dyeing bath, a larger quantity of which must therefore be used compared to that strictly necessary.
- a further drawback which may be encountered in the solution contained in the patent No. VI96A000142 is that of not defining in a sufficiently precise manner the peripheral speed of the rotating drum.
- the sole reference to the speed is that regarding the speed of rotation, which is considered to be slightly lower than the centrifuging speed which is used for wringing.
- the present invention proposes overcoming the abovementioned drawbacks .
- the main object of the present invention is to provide a method for washing or dyeing textile articles in a machine with rotating drum which is able to achieve a better quality of the finished product compared to the methods of the known art.
- Another object is that the method according to the invention should be able to achieve a further reduction in the values of the bath ratios compared to those of the known art .
- a further object is to reduce the cost of manufacturing rotating-drum machines .
- the treatment cycle envisages reversals in the direction of rotation of the drum with a pause between one rotation and the next during which the textile articles adhering to the drum and situated above the bath fall as a result of gravity into the said bath.
- the rotation of the drum is performed always in the same direction, with periodic variations from a maximum value to a minimum value of the speed of rotation of the drum, while keeping the garments always in contact with the side surface of the drum for the whole of the treatment time.
- the method according to the invention allows the washing or dyeing treatment of the textile articles to be performed more efficiently, employing bath ratios even lower than those required by machines which envisage spraying of the bath.
- the method according to the invention allows a reduction in the wear to which the garments are subject during treatment, improving the quality of the final product.
- the rotating-drum machine according to the invention has a cost which is lower than that of equivalent rotating-drum machines nowadays commercially available. Said objects and advantages will be indicated more clearly during the description of preferred embodiments of the invention which are provided by way of a non- limiting example with reference to the accompanying plates of drawings in which: - Fig. 1 shows a longitudinal section through the rotating-drum machine, also forming the subject of the invention, which implements the method according to the invention;
- FIG. 2 shows a cross-section along the plane II-II of the machine shown in Fig. 1;
- Fig. 3 illustrates, in the form of a velocity/time diagram, a treatment cycle of the method according to the invention
- - Fig. 4 illustrates, in the form of a velocity/time diagram, another treatment cycle of the method according to the invention.
- the method according to the invention envisages introducing the textile articles, denoted overall by 7, into the drum 6, causing rotation of the drum 6 with the textile articles 7 inside a bath B containing in solution form washing or dyeing products for performing the treatment, and then discharging the bath B after a predetermined period of time.
- v indicates the tangential velocity of the drum
- D the angular velocity of the drum
- r the radius of the drum
- d the diameter of the drum
- a c the centrifugal acceleration of the drum
- g the acceleration of gravity
- n the abovementioned compensation ratio
- the articles are made to adhere by the centrifugal force to the internal surface of the drum with the correct compression avoiding wear of the articles against the said surface, in particular avoiding the formation of different treatment zones opposite the holes in the drum and the smooth parts .
- the said centrifugal force is able to ensure that the articles have a sufficient degree of softness or looseness or on the other hand an optimum compaction in order to allow correct penetration of the liquid cleaning or dyeing product .
- this acceleration has been designed to achieve an optimum rate of penetration of the liquid, which must not be excessively high, in order to avoid damaging the garments, creating for example the unattractive napped effect, and must not be too low, in order to avoid the liquid not penetrating correctly throughout the fibre of the articles .
- the tangential velocity of the drum 6 during the abovementioned treatment cycles for achieving optimum penetration of the product into the articles advantageously assumes values in the range of between 2.5 and 4.5 m/s.
- the abovementioned velocity taking into account the dimensions of the drums, is related to the corresponding acceleration values so as not to produce either falling of the articles, with their consequent mechanical wear, or excessive compaction, which is also responsible for damage to the articles.
- the treatment cycle C x shown in the diagram of Fig. 3, envisages a pause t p between one rotation and the next, during which the textile articles 7 adhering to the drum 6 and situated above the bath B fall owing to the force of gravity into the said bath B.
- the rotation of the drum 6 is performed, preferably, but not necessarily, in clockwise directions O and anti- clockwise directions A, which are separated by a pause t p of short duration, during which the drum 6 is at a standstill .
- a variation in the treatment cycle consists of the cycle C 2 , shown in Fig. 4, which differs from that in Fig. 3 owing to the fact that it envisages the rotation of the rotating drum 6 always in the same direction
- the machine 1 with rotating drum 1 which implements the method according to the invention and itself forms the subject of the invention comprises, in addition to the rotating drum 6 inside which the textile articles 7 are introduced, a frame 2 provided with first resilient means 4 and second resilient means 5 which support a tank
- the rotating drum 6 is housed inside the tank 3 and has a plurality of through-holes - indicated overall by 8 - formed and distributed uniformly over its side surface 9.
- the machine 1 also comprises supporting and rotating means, denoted overall by 10 and consisting of a shaft 16 fixed by means of screws 17 to the rotating drum 6 and connected to drive means, not shown in the accompanying figures, which cause rotation of the drum 6.
- the bottom 18 of the tank 3 is provided with flow-breaking means, which are denoted overall by 11 and are designed to oppose the rotational entrainment of the treatment bath B and in this way produce swirling and atomization of the treatment liquid such as to allow the latter to treat the articles by penetrating correctly into their fibres.
- the tangential velocity of the drum 6 during the treatment is in the range of between 2.5 and 4.5 m/s.
- optimum tangential velocities in the ranges of 3.0 to 4.5 m/s, 3.0 to 4.5 m/s, 2.8 to 4.5, 2.5 to 3.8 m/s, respectively, for drums 6 distinguished by diameters in the ranges of 1.7 to 1.9 m, 1.5 to 1.7 m, 1.2 to 1.5 m and 0.8 to 1.0 m have been recorded.
- the table shows below the drum values for five preferred embodiments of machines, relating to the diameter, the angular velocity, the compensation ratio and the tangential velocity which have proved to be particularly advantageous for optimum treatment of the garments, under the conditions specified above:
- the flow-breaking means 11 consist of a lowered zone 12 formed in the bottom 18 of the tank 8 and provided with an inclined base 14 converging towards a pipe 15 for discharging the bath B.
- the rotating drum 6 has, preferably but not necessarily, three inwardly projecting longitudinal vanes, each denoted by 13 , for moving the textile articles 7.
- the treatment is started by causing rotation of the rotating drum 6 in accordance with any one of the cycles C x , C 2 or another cycle chosen by the user.
- the rotating drum 6 would tend to cause rotation of the bath B, this being opposed instead by the lowered zone 12 which stops it, producing atomization of the bath B which advantageously assists treatment of the textile articles 7 when they are in the position extracted from the bath B .
- the longitudinal vanes 13 allow easier movement of the textile articles 7, in particular during raising of the latter from the bath B.
- the washing or dyeing treatment may be performed with bath ratios which are lower than those of machines of the known type and for treatment of the same quantities of product. Moreover, it also possible to achieve the object of improving the final quality of the textile articles, in terms of more uniform distribution of treatment and lesser wear. On the basis of that stated above it can be understood therefore that the method according to the invention and the machine which implements it achieve the objects and obtain the advantages listed above.
- the treatment cycles may be varied according to the user's requirements, while the machine may undergo modifications aimed at improving the treatment of the products or simplifying its construction.
- the lowered zone formed on the bottom of the tank could have any form and dimensions different from those shown in the figures below.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITVI20020272 | 2002-12-18 | ||
IT000272A ITVI20020272A1 (en) | 2002-12-18 | 2002-12-18 | METHOD AND MACHINE WITH ROTATING BASKET FOR THE TREATMENT OF WASHING OR DYEING OF TEXTILE MANUFACTURES. |
PCT/IT2003/000832 WO2004055252A1 (en) | 2002-12-18 | 2003-12-18 | Method and machine with rotating drum for the washing or dyeing treatment of textile articles |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1581681A1 true EP1581681A1 (en) | 2005-10-05 |
EP1581681B1 EP1581681B1 (en) | 2006-02-01 |
EP1581681B8 EP1581681B8 (en) | 2006-08-23 |
Family
ID=32587920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03786215A Expired - Lifetime EP1581681B8 (en) | 2002-12-18 | 2003-12-18 | Method and machine with rotating drum for the dyeing treatment of textile articles |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1581681B8 (en) |
AT (1) | ATE317030T1 (en) |
AU (1) | AU2003295212A1 (en) |
DE (1) | DE60303458D1 (en) |
IT (1) | ITVI20020272A1 (en) |
WO (1) | WO2004055252A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2935515B1 (en) | 2012-12-19 | 2020-04-15 | Ticona LLC | Liquid crystalline composition having a dark black color |
WO2015094486A1 (en) | 2013-12-19 | 2015-06-25 | Ticona Llc | Liquid crystalline composition having a pearly luster |
CN110820199B (en) * | 2019-11-26 | 2022-02-01 | 安徽翰联色纺股份有限公司 | Textile cleaning device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3805803C2 (en) * | 1987-08-25 | 1998-12-24 | Bosch Siemens Hausgeraete | Method for wetting items of laundry placed in the laundry drum |
IT1230903B (en) * | 1989-06-23 | 1991-11-08 | Pierino Vellati | PROCEDURE AND MACHINE FOR WASHING AND / OR DRYING OF TEXTILE MANUFACTURES. |
DE4310595A1 (en) * | 1993-03-31 | 1994-10-06 | Bosch Siemens Hausgeraete | Washing machine with a reversing laundry drum |
JP3642635B2 (en) * | 1996-07-08 | 2005-04-27 | 旭電化工業株式会社 | Thermoplastic resin film |
JP3311684B2 (en) * | 1998-08-05 | 2002-08-05 | 三洋電機株式会社 | Drum type washer and dryer |
-
2002
- 2002-12-18 IT IT000272A patent/ITVI20020272A1/en unknown
-
2003
- 2003-12-18 AT AT03786215T patent/ATE317030T1/en not_active IP Right Cessation
- 2003-12-18 AU AU2003295212A patent/AU2003295212A1/en not_active Abandoned
- 2003-12-18 EP EP03786215A patent/EP1581681B8/en not_active Expired - Lifetime
- 2003-12-18 WO PCT/IT2003/000832 patent/WO2004055252A1/en not_active Application Discontinuation
- 2003-12-18 DE DE60303458T patent/DE60303458D1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO2004055252A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2004055252A1 (en) | 2004-07-01 |
AU2003295212A1 (en) | 2004-07-09 |
ATE317030T1 (en) | 2006-02-15 |
EP1581681B1 (en) | 2006-02-01 |
DE60303458D1 (en) | 2006-04-13 |
ITVI20020272A1 (en) | 2004-06-19 |
EP1581681B8 (en) | 2006-08-23 |
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