EP0394655B1 - Verfahren und Vorrichtung zum Beheizen des Pressbandes einer Presse - Google Patents

Verfahren und Vorrichtung zum Beheizen des Pressbandes einer Presse Download PDF

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Publication number
EP0394655B1
EP0394655B1 EP90104713A EP90104713A EP0394655B1 EP 0394655 B1 EP0394655 B1 EP 0394655B1 EP 90104713 A EP90104713 A EP 90104713A EP 90104713 A EP90104713 A EP 90104713A EP 0394655 B1 EP0394655 B1 EP 0394655B1
Authority
EP
European Patent Office
Prior art keywords
pressure
pressure medium
pressure chamber
press
pressing belt
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 - Lifetime
Application number
EP90104713A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0394655A1 (de
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.)
Theodor Hymmen KG
Original Assignee
Theodor Hymmen KG
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 Theodor Hymmen KG filed Critical Theodor Hymmen KG
Priority to AT90104713T priority Critical patent/ATE90910T1/de
Publication of EP0394655A1 publication Critical patent/EP0394655A1/de
Application granted granted Critical
Publication of EP0394655B1 publication Critical patent/EP0394655B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
    • B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/062—Press plates
    • B30B15/064—Press plates with heating or cooling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
    • B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
    • B30B5/06—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band
    • B30B5/062—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band urged by directly-acting fluid pressure

Definitions

  • the invention relates to a method for heating the driven press belt of a continuously operating press, in which the press pressure exerted by a gas-filled pressure chamber on the working belt of the press belt, the gaseous pressure medium in the effective zone between the pressure plate heated inside and the press belt rear side in one through the pressure plate guided short circuit is moved turbulently and workpieces are conveyed along the pressure chamber from an inlet end to an outlet end by means of the press belt.
  • a method of this type is known (EP 0 295 427 A1) in which the pressure is limited by a fluid in a circumferentially sealed pressure chamber which is delimited on one side by a pressure plate and on the other side by the press belt of a press, in particular a double belt press Print medium is generated and this print medium is positively movable.
  • the pressure medium is moved in the active zone at flow speeds of 2 to 50 m / sec, preferably 20 to 40 m / sec in the case of gaseous pressure media.
  • the extent of the heat transfer capacity of the pressure medium can be controlled by varying the flow rate and / or the operating pressure.
  • the heat transfer capacity of the pressure medium is increased by a higher flow rate and / or by an increased operating pressure.
  • the invention is based on the object of designing a method of the type mentioned at the outset and a device for this method in such a way that the amount of heat which can be transferred in a pressure chamber (a pressure pad) of a press, in particular a double belt press, is increased with rapidly moving fluid pressure media, that a high amount of heat can be transferred even in the lower pressure ranges.
  • This object is achieved in that steam is added to the gaseous pressure medium before entering the pressure chamber, the steam-air mixture is applied to the back of the press belt in the pressure chamber and a droplet condensation is generated with the evaporation heat released, so that the liquid droplets are swirled by the turbulent flow and evaporated again due to the existing heating before the pressure medium emerges from the pressure chamber and are absorbed by the pressure medium.
  • the partial amount of steam that is mixed with the gaseous pressure medium is adjustable.
  • the press belt preferably made of steel, which is cooled in the inlet area of the pressure chamber by the not yet heated product, acts as a condenser in the area of the pressure chamber near the inlet of the pressure medium, while the product, which is heated by the heat of condensation released, also releases heat to the press belt again that the heated press belt acts before the air flow emerges from the pressure chamber as an evaporator for the water droplets that have deposited on the back of the press belt.
  • the air flow used as pressure medium can be saturated with water vapor before entering the pressure chamber.
  • FIGS. 1 to 3 of the drawings Embodiments of devices for carrying out the method according to the invention are shown in FIGS. 1 to 3 of the drawings and are described below.
  • Fig. 1 shows a continuously operating press 1, which is equipped with a preferably made of steel endless press belt 2, which is guided over deflection rollers, not shown, and driven by the deflection rollers.
  • the press belt moves in the direction of arrow 3.
  • workpieces 4 for example material webs, are processed and continuously moved by means of the driven press belt 2 along a pressure chamber 5, which passes through the back of the working belt of the press belt, through a pressure plate 6 and through itself on the work strand supporting sealing strips 7 is limited, these sealing strips being fixed in a groove in the pressure plate 6.
  • the printing plate 6 is heated and has heating means integrated in the printing plate.
  • the pressure in the pressure chamber 5 is generated by a pressure medium which is moved turbulently in the pressure chamber and is guided in a circuit.
  • a U-shaped channel 8 is provided, which in the exemplary embodiment shown extends partially outside the pressure plate 6.
  • the channel 8 has a conveying device 9 for the circulation of the pressure medium, which can be designed as a fan.
  • an evaporator 10 is provided in the duct, which is arranged on the suction side of the fan in the exemplary embodiment shown.
  • Air is used as the pressure medium, and 10 water vapor is added by means of the evaporator.
  • the pressure chamber 5 is designed in the form of a gap in the region of the active zone between the underside of the pressure plate 6 and the opposite rear side of the press belt.
  • the gap thickness is the same over the entire length of the pressure chamber.
  • the water vapor-air mixture is introduced into the pressure chamber 5 through the vertically extending channel line 11 and flows out of the pressure chamber 5 through the channel line 12.
  • the pressure chamber can have at least two zones of different gap thickness in the running direction of the press belt.
  • the entry of the Water vapor-air mixture adjacent zone of the pressure chamber could be provided with a gap thickness that is smaller than that in the outlet area. This would result in an increased flow velocity and thus a more intensive heat transfer from the heated pressure plate to the press belt in the inlet area, in which area the amount of heat that is applied to the press belt and thus to the workpiece is suddenly increased by the water vapor condensing on the back of the press belt.
  • FIG. 2 shows an embodiment in which the conveying device 9 for the pressure medium and the evaporator 10 are integrated in the pressure plate 13.
  • the line strands 14, 15, 16 and 17 form the ring line for the pressure medium, to which a bypass line 18 is arranged, in which the evaporator 10 is provided.
  • the amount of the pressure medium passed through the evaporator 10 and thus the partial amount of the liquid vapor / water vapor can be set via fittings 19, 20.
  • the evaporator 10 is arranged in a feed line 21 for the gaseous pressure medium.
  • the ring lines according to FIGS. 1 and 2 are also equipped with a feed line for the gaseous pressure medium, which, however, is not shown in these figures. This supply line can also be used to compensate for leaks that occur during the pressure medium circuit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Press Drives And Press Lines (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Drying Of Solid Materials (AREA)
  • Forging (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Paper (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
EP90104713A 1989-04-25 1990-03-13 Verfahren und Vorrichtung zum Beheizen des Pressbandes einer Presse Expired - Lifetime EP0394655B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90104713T ATE90910T1 (de) 1989-04-25 1990-03-13 Verfahren und vorrichtung zum beheizen des pressbandes einer presse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3913555A DE3913555A1 (de) 1989-04-25 1989-04-25 Verfahren und vorrichtung zum beheizen des pressbandes einer presse
DE3913555 1989-04-25

Publications (2)

Publication Number Publication Date
EP0394655A1 EP0394655A1 (de) 1990-10-31
EP0394655B1 true EP0394655B1 (de) 1993-06-23

Family

ID=6379392

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104713A Expired - Lifetime EP0394655B1 (de) 1989-04-25 1990-03-13 Verfahren und Vorrichtung zum Beheizen des Pressbandes einer Presse

Country Status (13)

Country Link
US (1) US5094308A (fi)
EP (1) EP0394655B1 (fi)
JP (1) JPH0832377B2 (fi)
CN (1) CN1022301C (fi)
AT (1) ATE90910T1 (fi)
DE (1) DE3913555A1 (fi)
ES (1) ES2041460T3 (fi)
FI (1) FI94328C (fi)
LT (1) LT3783B (fi)
LV (1) LV11112B (fi)
RU (1) RU1829963C (fi)
UA (1) UA13389A1 (fi)
ZA (1) ZA903083B (fi)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19815863A1 (de) * 1998-04-08 1999-10-14 Peters W Maschf Druckplatten-Anordnung zum Zusammenfügen einer Mehrzahl von jeweils wenigstens eine Glattbahn und/oder wenigstens eine Wellbahn umfassenden Materialbahnen zu einer Wellpappebahn
US6908295B2 (en) * 2000-06-16 2005-06-21 Avery Dennison Corporation Process and apparatus for embossing precise microstructures and embossing tool for making same
DE10114381A1 (de) * 2001-03-23 2002-10-10 Metso Paper Inc Verfahren zur kontinuierlichen Herstellung von Holzspanplatten und ähnlichen bahnförmigen Plattenwerkstoffen und dafür geeignete Doppelbandpresse
AT520168A5 (de) * 2012-10-05 2019-01-15 Berndorf Band Gmbh Doppelbandpresse mit zumindest zwei Bändern
US10421305B2 (en) * 2015-05-21 2019-09-24 Chums, Inc. Feed-through thermal pressing system and associated components

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2135763A (en) * 1935-11-13 1938-11-08 Frederick A Nicholson Endless traveling platen fluid pressure press
US2459295A (en) * 1944-05-06 1949-01-18 Per F Skoog Apparatus for the flow manufacture of sheet material
US2437680A (en) * 1945-01-11 1948-03-16 Armstrong Cork Co Moisture control device
US2909804A (en) * 1955-09-16 1959-10-27 Perry G Means Continuous hot pressing machine for the manufacture of compressed boards
US3580795A (en) * 1966-10-05 1971-05-25 John E Eichenlaub Apparatus for welding heat sealable sheet material
DE2053351C3 (de) * 1970-10-30 1974-11-07 Wilhelm Mende & Co, 3371 Teichhuette Einrichtung zur Herstellung einer endlosen dünnen Spanplattenbahn
DE2904067A1 (de) * 1979-02-03 1980-12-18 Friz Helmut Dipl Ing Formenpresse
DE2922151A1 (de) * 1979-05-31 1980-12-11 Sandvik Conveyor Gmbh Doppelbandpresse
DE2937410A1 (de) * 1979-09-15 1981-04-02 Into Solymar Benalmadena Costa Malaga Kerttula Kontinuierlich arbeitende plattenpresse
DE3007493C2 (de) * 1980-02-28 1982-04-29 G. Siempelkamp Gmbh & Co, 4150 Krefeld Pressenplatte für heizbare Pressen
JPS62104700A (ja) * 1985-10-31 1987-05-15 Meiki Co Ltd ホットプレスの加熱制御装置
JPS62212111A (ja) * 1986-03-14 1987-09-18 Mitsubishi Rayon Eng Co Ltd 連続加圧方法
US4794855A (en) * 1986-08-05 1989-01-03 Mitsubishi Rayon Engineering Co., Ltd. Continuous press machine
DE3709958A1 (de) * 1987-03-26 1988-10-13 Santrade Ltd Doppelbandpresse
DE3719976A1 (de) * 1987-06-15 1988-12-29 Hymmen Theodor Gmbh Verfahren und vorrichtung zum aufbringen einer flaechenpressung auf pressbandgetriebene werkstuecke

Also Published As

Publication number Publication date
ES2041460T3 (es) 1993-11-16
LV11112B (en) 1996-08-20
LTIP1839A (en) 1995-08-25
LV11112A (lv) 1996-04-20
RU1829963C (ru) 1993-07-23
CN1022301C (zh) 1993-10-06
UA13389A1 (uk) 1997-02-28
US5094308A (en) 1992-03-10
JPH0832377B2 (ja) 1996-03-29
EP0394655A1 (de) 1990-10-31
CN1046702A (zh) 1990-11-07
ZA903083B (en) 1991-01-30
LT3783B (en) 1996-03-25
ATE90910T1 (de) 1993-07-15
FI94328B (fi) 1995-05-15
JPH02299799A (ja) 1990-12-12
DE3913555A1 (de) 1990-10-31
FI94328C (fi) 1995-08-25
FI902059A0 (fi) 1990-04-24
DE3913555C2 (fi) 1991-03-21

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