EP0003684B1 - Radio-frequency textile drying method and apparatus - Google Patents
Radio-frequency textile drying method and apparatus Download PDFInfo
- Publication number
- EP0003684B1 EP0003684B1 EP19790300204 EP79300204A EP0003684B1 EP 0003684 B1 EP0003684 B1 EP 0003684B1 EP 19790300204 EP19790300204 EP 19790300204 EP 79300204 A EP79300204 A EP 79300204A EP 0003684 B1 EP0003684 B1 EP 0003684B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- turntable
- supports
- radio frequency
- casing
- frequency energy
- 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
- 239000004753 textile Substances 0.000 title claims description 11
- 238000001035 drying Methods 0.000 title claims description 10
- 239000000463 material Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 9
- 230000002301 combined effect Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 240000002129 Malva sylvestris Species 0.000 description 1
- 235000006770 Malva sylvestris Nutrition 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 235000013351 cheese Nutrition 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
- F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
- F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy
Definitions
- This invention relates to a method and apparatus for drying textile material by exposure to radio-frequency energy and which can also be used for causing dye fixation simultaneously with drying.
- the vacuum source applies a reduced pressure within the hollow supports which are perforated, and surmounted by a sealing belt and moisture in the form of vapour is removed from the hanks or bobbins through the hollow supports.
- the preferred radio frequency to be applied to the electrodes and the intended duration of operation of the described apparatus to achieve adequate drying and heating is not however specified yet is vitally important for effective operation and for the avoidance of damage to the treated textile material.
- the object of the present invention is to provide a more effective and reliable method of treatment by use of apparatus which is simplified and different in construction and operation compared with that of the prior art and does not require sealing means.
- a method of drying textile material comprises mounting the material on upright supports which are spaced around a substantially horizontal turntable between plates for creating a radio-frequency energy field in the vicinity of said supports, and thereafter rotating the turntable, whilst exposing the material on the supports to radio frequency energy and evacuating water vapour from the material by application of vacuum thereto characterised in that said material is simultaneously exposed to vacuum and radio frequency energy, that suction is applied to the exterior of the textile material by creating reduced pressure in a casing which encloses the plates and supports on the turntable and that first water and then water vapour driven from the material is evacuated from the casing by a vacuum pump during a treatment period of between 5 and 15 minutes at a radio frequency of 27.12 MHZ.
- the apparatus according to the invention is characterised by a casing which encloses the supports on the turntable and the said means and by a vacuum pump having at least one inlet reaching to the bottom of the casing for successively evacuating water and water vapour from the casing and the packages on the supports, under the combined effect of vacuum and radio frequency energy simultaneously applied externally to material on the supports during a treatment period of between 5 and 15 minutes at a radio frequency of 27.12 MHZ.
- the unit comprises a casing 1 of rectangular shape formed on four sides with access openings covered by removable panels 2.
- the casing 1 has a superstructure 3, also of rectangular shape, with access openings on two opposite sides covered by removable panels 4.
- the superstructure 3 contains for example a 45 KW. 27.12 MHz dielectric generator (not shown).
- the casing 1 mainly contains a rotary motor- driven turntable 5 which carries, around its periphery, a plurality of vertical electrically insulated locating spindles 6 for receiving packages-e.g. cones, cheeses or muffs-of yarn.
- the casing has a rectangular opening 7 in its front side through which an operator can place and withdraw packages on and from the spindles 6.
- a rotary turntable with 24 spindles 6 is shown and this can be driven by its motor at an infinitely variable speed to enable the unit to handle between 50 and 500 packages per hour as may be required for a particular treatment and type of textile material or fibre.
- To one side of the opening 7 is a control panel 8 which incorporates all the Radio frequency generator and turntable operating controls (not shown).
- Two exhaust pipes 11 emerge from the top of the casing 1 and are connected to a vacuum pump (not shown).
- a stationary 'live' cylindrical electrode 9 coupled to the radio frequency generator, whilst concentrically outside the turntable 5 there is disposed a stationary 'earth' cylindrical electrode 10.
- the size and spacing of the electrodes 9 and 10 and the size of the turntable 5 may need to be changed depending upon the textile material which is to be treated and whether drying is or is not required to cause dyesetting and the apparatus is adapted to enable this to be done.
- Fig. 2 there are shown alternative positions 9' and 10' for the inner and outer concentric cylindrical electrodes respectively when the unit is to be used for dye-setting and drying, a larger diameter turntable 5' being then also necessary.
- the packages placed on the spindles 6 may contain for example up to 5 kilograms of yarn sliver or tow and may carry at least their own weight of water (5 kgs).
- the method of treatment after the packages have been placed and the turntable starts to rotate is for the vacuum pump and the radio frequency generator to be simultaneously operated. This first removes liquid water mechanically and then removes water vapour which is driven from the yarn by the radio frequency field within a period of 5 to 15 minutes depending upon the size of the packages. Yarn may be dried to ambient Regain consistent with normal conditioning i.e. 15% for wool, 4% for nylon and acrylic and 1% for polyester. Without the radio frequency energy the vacuum pump will remove very little water.
- the method is effective because as the water in the textile material is heated by the radio frequency energy, a positive pressure is produced within the fibre and this expels mechanically retained liquid water as a first step, followed by water vapour as the temperature within each package rises towards 100°C.
- the liquid water temperature is between 15°C and 30°C and the vacuum pump only ensures that the water which is driven off is removed to a suitable container or drain.
- This method can equally well be applied to fibres in most forms provided they are restrained from moving with the air or vapour flow.
- beams (rolls) cloth or beams of yarn as well as packages and loose stock.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- Molecular Biology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Fiber Materials (AREA)
Description
- This invention relates to a method and apparatus for drying textile material by exposure to radio-frequency energy and which can also be used for causing dye fixation simultaneously with drying.
- In French Patent Specification 2299443 there has been proposed apparatus for the drying and heat treatment of hanks or bobbins of textile threads which comprises a continuously drivable transporter on which hollow supports for the hanks or bobbins are mounted, and at least one pair of electrodes disposed on either side of the path of the hanks or bobbins and connected to a high frequency generator. The hollow supports are rotatably mounted on the transporter and means are provided for rotating the supports. A housing is disposed under the transporter and connected to fluid circulation means for example a vacuum source. In that specification there is specifically described an embodiment of such apparatus wherein the transporter comprises a rotating plate and the electrodes are cylindrical and coaxial with the rotation axis of the plate. The vacuum source applies a reduced pressure within the hollow supports which are perforated, and surmounted by a sealing belt and moisture in the form of vapour is removed from the hanks or bobbins through the hollow supports. The preferred radio frequency to be applied to the electrodes and the intended duration of operation of the described apparatus to achieve adequate drying and heating is not however specified yet is vitally important for effective operation and for the avoidance of damage to the treated textile material.
- The object of the present invention is to provide a more effective and reliable method of treatment by use of apparatus which is simplified and different in construction and operation compared with that of the prior art and does not require sealing means.
- In accordance with the invention a method of drying textile material comprises mounting the material on upright supports which are spaced around a substantially horizontal turntable between plates for creating a radio-frequency energy field in the vicinity of said supports, and thereafter rotating the turntable, whilst exposing the material on the supports to radio frequency energy and evacuating water vapour from the material by application of vacuum thereto characterised in that said material is simultaneously exposed to vacuum and radio frequency energy, that suction is applied to the exterior of the textile material by creating reduced pressure in a casing which encloses the plates and supports on the turntable and that first water and then water vapour driven from the material is evacuated from the casing by a vacuum pump during a treatment period of between 5 and 15 minutes at a radio frequency of 27.12 MHZ.
- Further apparatus for the performance of such method comprises a substantially horizontal turntable having upright supports spaced around its periphery for supporting yarn packages, means for rotating the turntable about its vertical centre axis, and means for creating a radio frequency energy field in the vicinity of the thus supported packages while the turntable rotates. The apparatus according to the invention is characterised by a casing which encloses the supports on the turntable and the said means and by a vacuum pump having at least one inlet reaching to the bottom of the casing for successively evacuating water and water vapour from the casing and the packages on the supports, under the combined effect of vacuum and radio frequency energy simultaneously applied externally to material on the supports during a treatment period of between 5 and 15 minutes at a radio frequency of 27.12 MHZ.
- A preferred embodiment of the apparatus according to the invention, and which is designated a radio frequency drying, relaxation and setting unit, is illustrated in the accompanying drawings to which reference is hereafter made. In these drawings:-
- Fig. 1 is a front elevation of the unit;
- Fig. 2 is a side elevation of the unit;
- Fig. 3 is a plan view of the unit; and
- Fig. 4 is a perspective view of the unit.
- Referring now to the drawings, the unit comprises a
casing 1 of rectangular shape formed on four sides with access openings covered byremovable panels 2. Thecasing 1 has asuperstructure 3, also of rectangular shape, with access openings on two opposite sides covered byremovable panels 4. Thesuperstructure 3 contains for example a 45 KW. 27.12 MHz dielectric generator (not shown). - The
casing 1 mainly contains a rotary motor- driventurntable 5 which carries, around its periphery, a plurality of vertical electrically insulated locatingspindles 6 for receiving packages-e.g. cones, cheeses or muffs-of yarn. The casing has arectangular opening 7 in its front side through which an operator can place and withdraw packages on and from thespindles 6. A rotary turntable with 24spindles 6 is shown and this can be driven by its motor at an infinitely variable speed to enable the unit to handle between 50 and 500 packages per hour as may be required for a particular treatment and type of textile material or fibre. To one side of theopening 7 is acontrol panel 8 which incorporates all the Radio frequency generator and turntable operating controls (not shown). Twoexhaust pipes 11 emerge from the top of thecasing 1 and are connected to a vacuum pump (not shown). - As shown in Figs. 2 and 3 there is disposed concentrically within the turntable 5 a stationary 'live'
cylindrical electrode 9 coupled to the radio frequency generator, whilst concentrically outside theturntable 5 there is disposed a stationary 'earth'cylindrical electrode 10. - The size and spacing of the
electrodes turntable 5 may need to be changed depending upon the textile material which is to be treated and whether drying is or is not required to cause dyesetting and the apparatus is adapted to enable this to be done. In Fig. 2 there are shown alternative positions 9' and 10' for the inner and outer concentric cylindrical electrodes respectively when the unit is to be used for dye-setting and drying, a larger diameter turntable 5' being then also necessary. - The packages placed on the
spindles 6 may contain for example up to 5 kilograms of yarn sliver or tow and may carry at least their own weight of water (5 kgs). - The method of treatment after the packages have been placed and the turntable starts to rotate is for the vacuum pump and the radio frequency generator to be simultaneously operated. This first removes liquid water mechanically and then removes water vapour which is driven from the yarn by the radio frequency field within a period of 5 to 15 minutes depending upon the size of the packages. Yarn may be dried to ambient Regain consistent with normal conditioning i.e. 15% for wool, 4% for nylon and acrylic and 1% for polyester. Without the radio frequency energy the vacuum pump will remove very little water.
- The method is effective because as the water in the textile material is heated by the radio frequency energy, a positive pressure is produced within the fibre and this expels mechanically retained liquid water as a first step, followed by water vapour as the temperature within each package rises towards 100°C. The liquid water temperature is between 15°C and 30°C and the vacuum pump only ensures that the water which is driven off is removed to a suitable container or drain.
- This method can equally well be applied to fibres in most forms provided they are restrained from moving with the air or vapour flow. As examples may be quoted beams (rolls) cloth or beams of yarn as well as packages and loose stock.
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB570978A GB1567111A (en) | 1978-02-13 | 1978-02-13 | Radio-frequency textile drying method and apparatus |
GB570978 | 1978-02-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0003684A1 EP0003684A1 (en) | 1979-08-22 |
EP0003684B1 true EP0003684B1 (en) | 1983-05-18 |
Family
ID=9801170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19790300204 Expired EP0003684B1 (en) | 1978-02-13 | 1979-02-09 | Radio-frequency textile drying method and apparatus |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0003684B1 (en) |
DE (1) | DE2965417D1 (en) |
ES (1) | ES478089A0 (en) |
GB (1) | GB1567111A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7674300B2 (en) | 2006-12-28 | 2010-03-09 | Kimberly-Clark Worldwide, Inc. | Process for dyeing a textile web |
US7740666B2 (en) | 2006-12-28 | 2010-06-22 | Kimberly-Clark Worldwide, Inc. | Process for dyeing a textile web |
US8182552B2 (en) | 2006-12-28 | 2012-05-22 | Kimberly-Clark Worldwide, Inc. | Process for dyeing a textile web |
US8632613B2 (en) | 2007-12-27 | 2014-01-21 | Kimberly-Clark Worldwide, Inc. | Process for applying one or more treatment agents to a textile web |
US9567725B2 (en) | 2011-04-14 | 2017-02-14 | Harnischfeger Technologies, Inc. | Swing automation for rope shovel |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2056642B (en) * | 1979-08-08 | 1983-05-11 | Dawson Int | Radio frequency drying of textile material |
DE2966649D1 (en) * | 1979-12-28 | 1984-03-15 | Ichikin Kogyosha Kk | Method and apparatus for aftertreatment of textile sheet by application of microwaves |
EP0063203A1 (en) * | 1981-04-16 | 1982-10-27 | The Ichikin, Ltd. | Method and apparatus for treatment of textile sheet material by application of microwaves |
CN114622334B (en) * | 2022-04-29 | 2024-01-23 | 青岛全季服饰有限公司 | Breathable ultraviolet-proof fabric and preparation method thereof |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4045639A (en) * | 1973-01-16 | 1977-08-30 | Food Processing Systems Corporation | Continuous microwave and vacuum dryer |
AR204636A1 (en) * | 1973-09-17 | 1976-02-20 | Koppelman Edward | PROCEDURE AND A DEVICE FOR DRYING WOOD |
FR2299443A1 (en) * | 1974-10-11 | 1976-08-27 | Mhm Electronic | Yarn packages are heat treated dielectrically - by passage through high frequency field formed between electrodes |
-
1978
- 1978-02-13 GB GB570978A patent/GB1567111A/en not_active Expired
-
1979
- 1979-02-09 DE DE7979300204T patent/DE2965417D1/en not_active Expired
- 1979-02-09 EP EP19790300204 patent/EP0003684B1/en not_active Expired
- 1979-02-26 ES ES478089A patent/ES478089A0/en active Granted
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7674300B2 (en) | 2006-12-28 | 2010-03-09 | Kimberly-Clark Worldwide, Inc. | Process for dyeing a textile web |
US7740666B2 (en) | 2006-12-28 | 2010-06-22 | Kimberly-Clark Worldwide, Inc. | Process for dyeing a textile web |
US8182552B2 (en) | 2006-12-28 | 2012-05-22 | Kimberly-Clark Worldwide, Inc. | Process for dyeing a textile web |
US8632613B2 (en) | 2007-12-27 | 2014-01-21 | Kimberly-Clark Worldwide, Inc. | Process for applying one or more treatment agents to a textile web |
US9567725B2 (en) | 2011-04-14 | 2017-02-14 | Harnischfeger Technologies, Inc. | Swing automation for rope shovel |
Also Published As
Publication number | Publication date |
---|---|
ES8101152A1 (en) | 1980-12-01 |
DE2965417D1 (en) | 1983-07-07 |
EP0003684A1 (en) | 1979-08-22 |
GB1567111A (en) | 1980-05-08 |
ES478089A0 (en) | 1980-12-01 |
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