EP0284710A2 - Dispositif pour le séchage et fixage thermique de tissus et analogues au moyen de circulation d'air de température élevée à l'intérieur d'un tunnel avec une pluralité de chambres de traitement - Google Patents

Dispositif pour le séchage et fixage thermique de tissus et analogues au moyen de circulation d'air de température élevée à l'intérieur d'un tunnel avec une pluralité de chambres de traitement Download PDF

Info

Publication number
EP0284710A2
EP0284710A2 EP88100135A EP88100135A EP0284710A2 EP 0284710 A2 EP0284710 A2 EP 0284710A2 EP 88100135 A EP88100135 A EP 88100135A EP 88100135 A EP88100135 A EP 88100135A EP 0284710 A2 EP0284710 A2 EP 0284710A2
Authority
EP
European Patent Office
Prior art keywords
chambers
air
recirculation
fabric
tunnel
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.)
Withdrawn
Application number
EP88100135A
Other languages
German (de)
English (en)
Other versions
EP0284710A3 (fr
Inventor
Sergio Dr. Ing. Bertacchi
Mario P.I. Panseri
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Reggiani Macchine SpA
Original Assignee
Reggiani Macchine SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Reggiani Macchine SpA filed Critical Reggiani Macchine SpA
Publication of EP0284710A2 publication Critical patent/EP0284710A2/fr
Publication of EP0284710A3 publication Critical patent/EP0284710A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure

Definitions

  • the present invention relates to a continuous-cycle automated apparatus for the drying and heat-fixing of fabrics by means of forced circulation of high-temperature air, made to circulate by means of fans inside a curing tunnel through which the fabric is caused to continuously advance.
  • a drying and/or heat-fixing apparatus for fabrics is generally constituted by a parallelepipedal tunnel, divided into chambers or sections which are separated from one another, through which the fabric is caused to advance, horizontally, by means of chain conveyors or the like.
  • Each section is divided into two chambers by a horizontal plane, the upper one being crossed by the fabric and containing devices for the distribution of the hot air on the fabric, while the lower one forms the recirculation and preheating chamber for the air originating from the upper drying chamber.
  • Fans, placed in each upper chamber blow hot air, distributing it uniformly on the entire fabric and simultaneously aspirate, from the lower chamber, the humid air originating from the upper chamber, which, after heating, is again blown onto the fabric.
  • the apparatus Since part of the air which circulates in the chambers must be continuously renewed in order to prevent saturation, the apparatus is provided with an extraction device, normally an extraction fan, which aspirates air from the various curing chambers through a series of channels connected to said chambers.
  • an extraction device normally an extraction fan, which aspirates air from the various curing chambers through a series of channels connected to said chambers.
  • a volume of air proportional to the water vapor produced in each section should be extracted from said section of the curing tunnel, and similarly a fresh-air inflow system should be provided in each section.
  • the extraction fan must have such a size as to be able to aspirate air from the fabric entry area, but not such as to aspirate air from the adjacent fabric output slot; in practice, however, the presence of a strong depression in the output section generates leakages of cold air through the fabric output slot, and these leakages of cold air create condensations, since they are originated by a hot and saturated air current which collides with the cold air draughts.
  • the main object of the present invention is therefore to provide a fabric drying apparatus structured so as to eliminate the formation of condensations in the terminal section of the curing tunnel, and therefore such as to eliminate all the disadvantages featured by known devices, which use a single extraction fan arranged in the terminal part of the tunnel.
  • An object of the invention is to provide an apparatus of the above described type, having means for the automatic adjustment of the flow-rate of the extraction fan as a function of the evaporate, and for the conveyance of the airflow through the various chambers, thus preventing the onset of a depression in the terminal section connected to the extraction fan.
  • a further object is to provide an apparatus which is simple to produce and has a cost which is competitive with that of known apparata having a single extraction fan.
  • said apparatus comprising, according to the present invention, adjustable-aperture means for connection between the individual contiguous recirculation chambers, adapted to vary the geometry of said chambers so as to allow the individual fans to aspirate part of the recirculation air from the preceding contiguous chamber and thus create a continuous aspiration moved in countercurrent with respect to the advancement of the fabric
  • said means for connection between the recirculation chambers being related to the flow rate of the final extraction fan, which in turn is controlled by a humidity control device, while
  • said means for connection between the contiguous recirculation chambers are constituted by at least one opening or port, provided in the vertical wall which divides said recirculation chambers, with which is associated a door, openable in a wing-like or similar manner, adapted to adjust the passage aperture of the air aspirated from each preceding chamber by the fan of the following one according to the flow-rate of the final extraction fan (exhauster), said doors being connected to one another and controlled by a motor reducer or the like with intervention programmed by means of said microprocessor device.
  • the drying apparatus is of the tunnel type with sections and fabric conveyance of a known kind, whereto the inventive concepts according to the present invention are applied.
  • a tunnel 1 is constituted by a parallelepipedal hollow body, extending lengthwise, with thermally insulated outer walls and internally divided into sections or compartments 2-­2a-2b etc. by means of vertical dividing walls 3-3a-3b; each section is divided into two superimposed chambers by means of horizontal walls 4-4a-4b etc.
  • figure 2 clearly shows the two superimposed chambers which are indicated by the numerals 5-5a. Horizontal slots 6-­6a-6b-6c etc.
  • Hot air distributors 8-8a-8b etc. are arranged in each upper chamber 5a of the various sections, and are constituted by substantially trapezoidal box-like bodies, arranged mutually side by side so as to leave between one another an interspace for the circulation of hot air also on their outside; each distributor, as shown by way of example and for the sake of convenience in only one section of the tunnel, is downwardly provided with holes 9 directed towards the underlying fabric; a similar assembly of distributors with trapezoidal bodies, arranged counterposed, is arranged below the fabric, as clearly shown in the figures.
  • the lower recirculation chambers 5 are connected to the respective air inflow chambers 5a by means of an extractable filtering structure 14, and are provided with a heating device such as a burner 15; moreover, openings 16 on to the outside, adapted to allow, together with the fabric passage slot 6, the aspiration of the fresh replacement air, are provided in the first recirculation chamber (fabric entry).
  • a heating device such as a burner 15
  • openings 16 on to the outside adapted to allow, together with the fabric passage slot 6, the aspiration of the fresh replacement air, are provided in the first recirculation chamber (fabric entry).
  • an extraction fan 17 is provided at the top of the last section (2b) of the tunnel 1, and, in known embodiments, aspirates air and steam from the various sections of the tunnel by means of a series of channels, not shown.
  • the present invention allows to avoid the formation of a strong depression in the final section of the tunnel by means of an adapted variation of the internal geometry of the recirculation chambers 5.
  • the adopted solution provides the arrangement, in the vertical walls 3-3a-3b etc. which divide the recirculation chambers 5, of an opening or window 18 and, respectively 18a, 18b, provided with a wing-like openable door 19 and, respectively, 19a-19b; all the doors are connected to one another by a rod or traction element 20, which protrudes in front of the tunnel (figure 1) and is subject to alternate axial movements by means of a motor reducer 21.
  • movements of the rod 20 it is possible to vary the aperture of the openings 18-18a-18b or rather to vary the load losses that the presence of the more or less open doors can create in the recirculation chamber.
  • the overall flow rate therefore follows a path which matches the advancement of the fabric and is adjusted by varying the position of the doors 19, that is to say the geometry of the individual recirculation chambers; the path of the air is indicated by the arrows A of figure 3.
  • the variation of the position of the doors is related to the flow-rate of the extraction fan 17 which is controlled by a known humidity control system.
  • the intake of fresh air in the fabric entry region is due to the sum of the depressions created in the chambers by the individual circulation fans and not by the extraction fan alone, with the consequence that a slight pressure is created in the output region or section of the tunnel, preventing fresh air from leaking through the fabric output slot and therefore from creating condensation phenomena.
  • the function of the extraction fan 17 is only to eliminate the air and the steam which the system draws into the final section of the tunnel.
  • the above described apparatus is furthermore provided with probes 22 for detecting the temperatures in the various sections and with an actuation and control device 23, of the microprocessor type or the like, connected to the motor variator 21 and to the extraction fan and programmed so as to vary the volume of evaporate (air + steam) as a function of the evaporate.
  • the invention described above is susceptible to modifications and variations, especially in the recirculation chamber geometry variation system, for example by adopting more openings and means equivalent to doors, without thereby abandoning the scope of the protection of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Fiber Materials (AREA)
EP88100135A 1987-03-31 1988-01-08 Dispositif pour le séchage et fixage thermique de tissus et analogues au moyen de circulation d'air de température élevée à l'intérieur d'un tunnel avec une pluralité de chambres de traitement Withdrawn EP0284710A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1990787 1987-03-31
IT19907/87A IT1202721B (it) 1987-03-31 1987-03-31 Impianto per l'asciugamento e il termofissaggio di tessuti e simili mediante circolazione di aria ad alta temperatura all'interno di un tunnel a piu' camera di trattamento

Publications (2)

Publication Number Publication Date
EP0284710A2 true EP0284710A2 (fr) 1988-10-05
EP0284710A3 EP0284710A3 (fr) 1989-01-18

Family

ID=11162238

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88100135A Withdrawn EP0284710A3 (fr) 1987-03-31 1988-01-08 Dispositif pour le séchage et fixage thermique de tissus et analogues au moyen de circulation d'air de température élevée à l'intérieur d'un tunnel avec une pluralité de chambres de traitement

Country Status (2)

Country Link
EP (1) EP0284710A3 (fr)
IT (1) IT1202721B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0413519A2 (fr) * 1989-08-17 1991-02-20 W.R. Grace & Co.-Conn. Sécheur cylindrique en zones
EP0543439A1 (fr) * 1991-11-19 1993-05-26 Stork Contiweb B.V. Sécheur avec gestion améliorée de gaz
ITFI20100054A1 (it) * 2010-03-29 2011-09-30 Unitech Textile Machinery Spa "struttura di eiezione di aria calda per forni di essiccazione di prodotti tessili"

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE504587C (de) * 1929-08-02 1930-08-06 Hermann Haas Kanal-Stufentrockner
GB1020401A (en) * 1964-04-22 1966-02-16 Hans Fleissner Process and device for drying materials
GB2043860A (en) * 1979-03-15 1980-10-08 Remonato G Remonato F Multistage Continuous Drying Apparatus, Especially for Tanned Hides
US4270283A (en) * 1979-01-10 1981-06-02 Ellis James F Air recycling apparatus for drying a textile web
FR2538887A1 (fr) * 1982-12-29 1984-07-06 Guy Frechin Sechoir polyvalent permettant la deshydratation totale ou partielle de produits notamment alimentaires
US4490924A (en) * 1982-05-28 1985-01-01 C. G. Sargent's Sons Corporation Method and apparatus for drying materials while being conveyed

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE504587C (de) * 1929-08-02 1930-08-06 Hermann Haas Kanal-Stufentrockner
GB1020401A (en) * 1964-04-22 1966-02-16 Hans Fleissner Process and device for drying materials
US4270283A (en) * 1979-01-10 1981-06-02 Ellis James F Air recycling apparatus for drying a textile web
GB2043860A (en) * 1979-03-15 1980-10-08 Remonato G Remonato F Multistage Continuous Drying Apparatus, Especially for Tanned Hides
US4490924A (en) * 1982-05-28 1985-01-01 C. G. Sargent's Sons Corporation Method and apparatus for drying materials while being conveyed
FR2538887A1 (fr) * 1982-12-29 1984-07-06 Guy Frechin Sechoir polyvalent permettant la deshydratation totale ou partielle de produits notamment alimentaires

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0413519A2 (fr) * 1989-08-17 1991-02-20 W.R. Grace & Co.-Conn. Sécheur cylindrique en zones
EP0413519A3 (en) * 1989-08-17 1992-05-20 W.R. Grace & Co.-Conn. Zoned cylindrical dryer
EP0543439A1 (fr) * 1991-11-19 1993-05-26 Stork Contiweb B.V. Sécheur avec gestion améliorée de gaz
US5507102A (en) * 1991-11-19 1996-04-16 Stork Contiweb B.V. Drier having a drying chamber with two separate gas inlets
ITFI20100054A1 (it) * 2010-03-29 2011-09-30 Unitech Textile Machinery Spa "struttura di eiezione di aria calda per forni di essiccazione di prodotti tessili"
EP2372279A1 (fr) * 2010-03-29 2011-10-05 Unitech Textile Machinery S.p.a. Structure d'injection d'air chauffé pour commander des fours pour des produits textiles

Also Published As

Publication number Publication date
IT1202721B (it) 1989-02-09
EP0284710A3 (fr) 1989-01-18
IT8719907A0 (it) 1987-03-31

Similar Documents

Publication Publication Date Title
US7316080B1 (en) Methodology and apparatus to reduce fuel consumption in conveyor dryers and ovens
US3802832A (en) Food processing apparatus for the heattreatment of food
JPH08501243A (ja) 蒸気室付き高性能調理オーブン
KR101266690B1 (ko) 강제 흡입 순환식 농산물 건조 장치
EP0127697B1 (fr) Appareillage pour purifier et faire circuler l'air chaud pour le traitement à la chaleur des étoffes textiles
US2111148A (en) Drier
US2257487A (en) Bread cooler
EP0284710A2 (fr) Dispositif pour le séchage et fixage thermique de tissus et analogues au moyen de circulation d'air de température élevée à l'intérieur d'un tunnel avec une pluralité de chambres de traitement
KR100218114B1 (ko) 대류건조 및/ 또는 고착장치
US3362081A (en) Cabinet dryer and method
US4494683A (en) Steam kiln
US4663863A (en) Dryer of the tenter type
EP0449388B1 (fr) Appareil de conditionnement adapté notamment au traitement de produits carnés
US1950942A (en) Drying apparatus
US1470306A (en) Art of and apparatus for drying materials
US2723463A (en) Electric drier
KR102154540B1 (ko) 하이브리드 냉온풍 겸용 건조장치
US2536581A (en) Heating or drying stove or cabinet
JPH02195844A (ja) 懸肉の処理方法並びにその装置
JPH06213503A (ja) 食品食肉等低温工場の空調装置
JP3645692B2 (ja) 結露防止装置
RU2199810C2 (ru) Способ сушки изделий и установка для его осуществления
GB2088426A (en) Drying wet textile fabrics
US3456359A (en) Tunnel drier for drying ceramic products
JPH0744948Y2 (ja) 穀物乾燥機

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19890719