EP0126865B1 - Vorrichtung zum Aufbringen einer Flächenpressung auf fortschreitende Werkstücke - Google Patents

Vorrichtung zum Aufbringen einer Flächenpressung auf fortschreitende Werkstücke Download PDF

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Publication number
EP0126865B1
EP0126865B1 EP84102413A EP84102413A EP0126865B1 EP 0126865 B1 EP0126865 B1 EP 0126865B1 EP 84102413 A EP84102413 A EP 84102413A EP 84102413 A EP84102413 A EP 84102413A EP 0126865 B1 EP0126865 B1 EP 0126865B1
Authority
EP
European Patent Office
Prior art keywords
pressure
diaphragm
sealing strip
pressure plate
groove
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
Application number
EP84102413A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0126865A1 (de
Inventor
Werner Dr. Pankoke
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 AT84102413T priority Critical patent/ATE27119T1/de
Publication of EP0126865A1 publication Critical patent/EP0126865A1/de
Application granted granted Critical
Publication of EP0126865B1 publication Critical patent/EP0126865B1/de
Expired 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00—Seal for a joint or juncture
    • Y10S277/906—Seal for article of indefinite length, e.g. strip, sheet

Definitions

  • the invention relates to a device for applying surface pressure to progressive workpieces, such as wood-based panels or the like, in which at least one circumferential press belt can be pressed onto the workpiece by a pressure medium which seals into an adjoining the press belt and is sealed by means of a circumferential sealing strip Pressure chamber can be introduced, the press belt is arranged to slide along the sealing strip and the pressure chamber on the side opposite the press belt is delimited by a pressure plate, the sealing strip being assigned a second pressure chamber delimited by the pressure plate and a sealing part.
  • a device of this type is known (DE-OS 29 53078), in which a friction connection is provided between the sealing part of the second pressure chamber and the side faces of the groove of the pressure plate in which the sealing part is arranged.
  • the edges of the sealing part are pressed against the assigned groove surfaces by means of a leaf spring, which can tire.
  • Added to this is the abrasion that occurs on the sealing part due to the movements relative to the pressure plate.
  • the sealing part is not connected to a holding strip that supports the sealing strips that are supported on the press belt, but is only supported on this holding strip. Both in the area between the holding strip and the sealing part delimiting the second pressure chamber and between this sealing part and the associated surfaces of the pressure plate, pressure medium losses occur, which in the known device are taken up by channels provided in the pressure plate.
  • the invention has for its object to design a device of the type mentioned so that pressure medium losses in the region of the second pressure chamber are avoided.
  • the sealing part is designed as a strip-shaped membrane, the membrane edges are fixed to the pressure plate by screws and the sealing strip is fastened to the strip-shaped membrane by means of a socket or directly. Due to the strip-shaped membrane and its clamping on the edge, no pressure medium losses occur in the area of the second pressure chamber, so that there is a pressure plate construction that is free of discharge channels for any leakage quantities and thus simple.
  • the device shown has a lower frame 10 and an upper frame 11, in each of which endless press belts 12 are installed.
  • the press belts 12 are tensioned on deflection rollers 13 and can be driven by them. They are arranged with respect to one another with a gap which corresponds to the width of a workpiece 14 to be machined. While the press belts 12 carry out a horizontal movement with their surfaces touching the workpiece 14, the workpiece 14 is drawn into the device, specifically into the gap that exists between the surfaces, and is pressurized there by the surfaces of the press belts 12. When the workpiece 14 passes through the device, it is processed so that it leaves the gap between the press belts 12 at the outlet from the device as a finished workpiece.
  • foils 15, which run off supply rolls 16, are pressed onto the top and bottom of the workpiece 14.
  • Such a pressing process can take place at room temperature; but it can also simultaneously provide the application of high temperatures to the workpiece 14 in the machining area.
  • the upper frame 11 can be pressed against the lower frame 10 as a whole or, after a rough adjustment of the distance between the upper frame 11 and the lower frame 10, the required pressure can be exerted by means of the air pressure prevailing in pressure chambers 17 which are each arranged on the back of the press belt 12 with respect to the workpiece 14, that is to say on the surface of the press belt 12 which is not in contact with the workpiece 14.
  • guide slides 18 are provided for the rough adjustment, which are fixedly arranged on the lower frame 10 and on which the upper frame 11 can be displaced in the vertical direction.
  • Hydraulic cylinders 19 provide for the displacement.
  • the pressure chambers 17 are delimited by pressure plates 20, which are guided relative to the frames 10 and 11 and whose movement is caused by hydraulic cylinders 21.
  • the pressure plate 20 has on its surface facing the press belt a circumferential groove 22 for fastening a sealing strip 23. In the installed state, this sealing strip 23 rests the press belt 12, which slides along the seal during operation.
  • the pressure chamber 17 is thus formed by the surface of the pressure plate 20, by the surface of the press belt 12 facing away from the workpiece 14 and by the circumferential sealing strip 23.
  • a pressure medium can be introduced into the pressure chamber 17 through the pressure plate 20 via openings.
  • the sealing strip 23 is held in the groove 22 by a socket 24, which likewise has a circumferential groove which is open to the press belt 12 and into which the sealing strip 23, which is rectangular in cross section, is inserted.
  • the socket 24 is arranged to be displaceable perpendicular to the press belt 12 within the groove 22, while the sealing strip 23 is stuck within the socket 24.
  • the width of the socket 24 is made smaller than the width of the groove 22, so that a distance 25 remains between the groove 22 and the socket 24. 2 of the drawing, the distance 25 on both sides is approximately the same size, for example.
  • a rubber-elastic seal in the form of a membrane 26 is arranged on the surface of the holder 24 located most inside the groove 22, parallel to the press belt 12, and is held clamped with its two longitudinal edges on the groove wall (pressure plate 20) and in this way the Seals the interior of the groove 22 from the atmosphere.
  • the elastic membrane 26 is releasably attached to the edge in the pressure plate 20 by means of screws 27.
  • screws 27 On both sides of the socket 24, forming the distances 25, there are one or more retaining strips 28 within the pressure plate 20, the inner surface of which presses the membrane against the edge of a corresponding surface of the pressure plate 20 under the pressure of the tightened screws 27.
  • the pressure medium hose 30 (e.g. made of rubber or plastic) runs parallel to it (replaceable after loosening the screws 29) lying on the inner surface of the holder 24 and offers the holder 24 a flexible abutment on the one hand and a controllable pressure as a pressure device on the other hand, the pressure medium hose 30 to one or more pressure medium connections 31 in the pressure plate 20 or the like. can be connected and subjected to variable pressure.
  • the pressure medium hose 30 forms a pressure chamber.
  • This pressure medium hose 30 can be round; but it can also - as shown in FIG. 2 - be flat on the one hand and curved on the other hand in order to exert the widest possible pressure on the membrane 26 and the frame 24.
  • FIG. 2 Such an embodiment with a pressure medium hose (membrane) (FIG. 2) shows various advantages. Escape of the sealing pressure in the direction of the pressure plate is reliably avoided.
  • the sealing groove 25, 40 between the socket 24, 37, 42 and the groove wall can be manufactured with greater tolerance.
  • the shear forces that propagate onto the frame through the rotating press belt can be introduced directly into the support structure at any point of the frame via the membrane according to the invention.
  • a pressure medium hose (according to FIG. 2), to arrange a rigid, continuous strip on the inside of the membrane, which is preferably connected to the socket e.g. can be rigidly connected by screws.
  • the seal pressure is introduced into the groove 22 and the entire seal, i.e. the rigid bar and socket with seal pressed together on the surrounding press belt.
  • the pressure medium acting from the pressure medium line, e.g. 31 is supplied directly to the respective membrane 32-36, which holds the socket with seal (FIGS. 4 and 5) or the seal (without socket) directly (FIGS. 6 to 8) in a different manner in each case.
  • the continuous membrane 32 to 36 forms a complete seal for the pressure chamber it forms with respect to the pressure plate 20, so that no pressure medium loss occurs even at higher pressure in the pressure chamber.
  • the socket 37 on the underside of the membrane 32 is e.g. fastened by means of a screw 38 and the laterally clamped edges of this membrane 32 held firmly but releasably by means of screws 39 in the multi-part pressure plate 20.
  • the socket 37 has sufficient play in the groove 40, but without tilting, so that the sealing strip 41 on the underside can freely adapt to any unevenness of the press belt 12.
  • the membrane 33 is fastened on the underside of the holder 42, so that the sealing strip 43 passes through the membrane 33.
  • neither a socket nor an integrated pressure space is provided.
  • the membrane 34 is detachably fastened by means of screws 44 on the underside of the pressure plate 20 and holds the flat sealing strip 45 in an incorporated groove 46 of the membrane 34.
  • the same configuration is also shown in the embodiment according to FIG. 7, in which the membrane 35 is by means of a incorporated rib 47 encompasses the sealing strip 48 over a wide area and thus holds it firmly against canting.
  • FIG. 8 discloses an essentially U-shaped membrane 36, the leg of which is clamped in a groove of the pressure plate 20 with a cross screw 49.
  • the sealing strip 50 sticks to the underside (outside) of the membrane 36, the edge strips of which are braced by means of side strips 51 which are held by the aforementioned screw 49, many of which are incorporated at a distance over the length of the membrane 36.
  • the pressure chamber for the vertical movement of the sealing strip 23 on the press belt is formed by the surfaces of the pressure plate 20 and the membranes 32-36 which are directed towards each other.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Saccharide Compounds (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Coating Apparatus (AREA)
EP84102413A 1983-03-24 1984-03-07 Vorrichtung zum Aufbringen einer Flächenpressung auf fortschreitende Werkstücke Expired EP0126865B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84102413T ATE27119T1 (de) 1983-03-24 1984-03-07 Vorrichtung zum aufbringen einer flaechenpressung auf fortschreitende werkstuecke.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833310700 DE3310700A1 (de) 1983-03-24 1983-03-24 Vorrichtung zum aufbringen einer flaechenpressung auf fortschreitende werkstuecke
DE3310700 1983-03-24

Publications (2)

Publication Number Publication Date
EP0126865A1 EP0126865A1 (de) 1984-12-05
EP0126865B1 true EP0126865B1 (de) 1987-05-13

Family

ID=6194510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84102413A Expired EP0126865B1 (de) 1983-03-24 1984-03-07 Vorrichtung zum Aufbringen einer Flächenpressung auf fortschreitende Werkstücke

Country Status (8)

Country Link
US (1) US4555988A (es)
EP (1) EP0126865B1 (es)
JP (1) JPS60901A (es)
AT (1) ATE27119T1 (es)
DE (1) DE3310700A1 (es)
ES (1) ES530859A0 (es)
FI (1) FI79668C (es)
IN (1) IN160413B (es)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3417289A1 (de) * 1984-05-10 1985-11-14 Fa. Theodor Hymmen, 4800 Bielefeld Vorrichtung zum aufbringen einer flaechenpressung auf fortschreitende werkstuecke
DE3417288A1 (de) * 1984-05-10 1985-11-14 Fa. Theodor Hymmen, 4800 Bielefeld Vorrichtung zum aufbringen einer flaechenpressung auf fortschreitende werkstuecke
DE3424599A1 (de) * 1984-07-04 1986-01-09 Fa. Theodor Hymmen, 4800 Bielefeld Vorrichtung zum aufbringen einer flaechenpressung auf fortschreitende werkstuecke
DE3436158A1 (de) * 1984-10-03 1986-04-10 Held, Kurt, 7218 Trossingen Gleitflaechendichtungen an doppelbandpressen
DE3525154A1 (de) * 1985-07-13 1987-01-22 Santrade Ltd Dichtungsanordnung fuer eine mit druckkammern ausgeruestete doppelbandpresse
AT386544B (de) * 1986-08-18 1988-09-12 Andritz Ag Maschf Maschine zum pressen und entwaessern bzw. filtrieren
AT385681B (de) * 1986-08-18 1988-05-10 Andritz Ag Maschf Druckeinrichtung fuer maschinen bzw. damit versehene maschine zum entwaessern bzw. filtrieren bzw. fuer pressgut
USRE35091E (en) * 1986-08-18 1995-11-21 Mascheninfabrik Andritz Actiengesellschaft Pressure device and seal for filter belt machines
DE3634274C1 (de) * 1986-10-08 1987-07-30 Santrade Ltd Temperaturbestaendige Dichtungsanordnung
DE3634273A1 (de) * 1986-10-08 1988-04-21 Santrade Ltd Dichtungsanordnung fuer die druckkammer einer doppelbandpresse
FI76192C (fi) * 1987-02-11 1988-09-09 Tampella Oy Ab Arrangemang foer taetning av en kammare som innehaoller tryckmedium.
JPH082350B2 (ja) * 1987-05-02 1996-01-17 コ−リン電子株式会社 脈波検出装置
DE3722157A1 (de) * 1987-07-04 1989-01-12 Hymmen Theodor Gmbh Vorrichtung zum aufbringen einer flaechenpressung auf kontinuierlich bewegte werkstoffbahnen
ATA185093A (de) * 1993-09-14 2000-06-15 Danubia Petrochem Polymere Doppelbandpresse mit hydrostatischer bandstütze
US6318727B1 (en) * 1999-11-05 2001-11-20 Kimberly-Clark Worldwide, Inc. Apparatus for maintaining a fluid seal with a moving substrate
CN102773903B (zh) * 2012-07-23 2014-05-07 青岛国森机械有限公司 一种专用于连续压制竹木集成材方料的单向折合履带
JP7058852B1 (ja) * 2021-12-28 2022-04-25 株式会社Sgic ダブルベルトプレス

Family Cites Families (11)

* 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
DE1078083B (de) * 1951-05-28 1960-03-24 Sulzer Ag Tuer oder Deckel zum selbsttaetigen gasdichten Abschluss grossflaechiger OEffnungen, insbesondere von Koksoefen oder Kokskuehlkammern
GB1345290A (en) * 1971-12-23 1974-01-30 Dunlop Ltd Inflatable seals
US3839147A (en) * 1973-03-22 1974-10-01 Beloit Corp Fibrous web press nip structure including nonporous belts backed by fluid pressure chambers having flexible sills
DE2722197C2 (de) * 1977-05-17 1979-06-07 Kurt 7218 Trossingen Held Gleitflächendichtung an kontinuierlichen Laminiermaschinen
DE2803521A1 (de) * 1978-01-27 1979-08-02 Siempelkamp Gmbh & Co Kontinuierliche presse
DE2803523B2 (de) * 1978-01-27 1979-12-20 G. Siempelkamp Gmbh & Co, 4150 Krefeld Kontinuierlich arbeitende Presse für die Herstellung von ggf. vergüteten Spanplatten u.dgl
DE2953078C2 (de) * 1979-02-23 1983-02-03 Kurt 7218 Trossingen Held Gleitflächendichtung an einer Laminiermaschine
DE2937971A1 (de) * 1979-09-20 1981-04-02 Theodor Hymmen Kg, 4800 Bielefeld Vorrichtung zum aufbringen einer flaechenpressung auf fortschreitende werkstuecke
DE2937972A1 (de) * 1979-09-20 1981-04-02 Theodor Hymmen Kg, 4800 Bielefeld Vorrichtung zum aufbringen einer flaechenpressung auf fortschreitende werkstuecke
US4420359A (en) * 1981-08-05 1983-12-13 Goldsworthy Engineering, Inc. Apparatus for producing fiber-reinforced plastic sheet structures

Also Published As

Publication number Publication date
IN160413B (es) 1987-07-11
JPH0452762B2 (es) 1992-08-24
US4555988A (en) 1985-12-03
DE3310700C2 (es) 1993-04-22
ES8500811A1 (es) 1984-11-01
FI79668C (fi) 1990-02-12
ES530859A0 (es) 1984-11-01
JPS60901A (ja) 1985-01-07
DE3310700A1 (de) 1984-09-27
EP0126865A1 (de) 1984-12-05
FI841163A (fi) 1984-09-25
FI841163A0 (fi) 1984-03-22
ATE27119T1 (de) 1987-05-15
FI79668B (fi) 1989-10-31

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