WO2002000422A1 - Presse a double bande - Google Patents

Presse a double bande Download PDF

Info

Publication number
WO2002000422A1
WO2002000422A1 PCT/EP2001/005980 EP0105980W WO0200422A1 WO 2002000422 A1 WO2002000422 A1 WO 2002000422A1 EP 0105980 W EP0105980 W EP 0105980W WO 0200422 A1 WO0200422 A1 WO 0200422A1
Authority
WO
WIPO (PCT)
Prior art keywords
press
roller
double belt
belts
support
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.)
Ceased
Application number
PCT/EP2001/005980
Other languages
German (de)
English (en)
Inventor
Bernd Heimes
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.)
Valmet Technologies Oy
Original Assignee
Metso Paper Oy
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 Metso Paper Oy filed Critical Metso Paper Oy
Priority to AU63940/01A priority Critical patent/AU6394001A/en
Publication of WO2002000422A1 publication Critical patent/WO2002000422A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/24—Moulding or pressing characterised by using continuously acting presses having endless belts or chains moved within the compression zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
    • B30B15/281—Arrangements for preventing distortion of, or damage to, presses or parts thereof overload limiting devices
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
    • B29K2711/14—Wood, e.g. woodboard or fibreboard

Definitions

  • the invention relates to a double belt press of the type corresponding to the preamble of claim 1.
  • Such double belt presses are known from DE 21 57 746 C3.
  • the inlet-side deflection rollers of the press belts are not at the same height, as seen in the direction of the plate strand. However, this is the case with the double belt presses of DE 37 25 383 C1 and DE 39 18 755 C2.
  • the generic double belt presses are mostly used for the production of chipboard and similar boards from various wood-like raw materials. It can be, for example, MDF boards, actual wood chipboard, boards pressed from straw of different provenance, OSB boards, LVL boards and the like.
  • the small-sized starting material for all of these plates is sprinkled onto the horizontal lower press belt (as in DE 21 57 746 C3) or a feed belt upstream of it (as in DE 37 25 383 C1 or DE 39 18 755 C2) and, if necessary, after a Pre-compression is fed to the actual press inlet, where there is vigorous further compression in the thickness ratio of 1: 4 to 1: 7 to the final thickness of the plate strand that forms.
  • the invention has for its object to avoid such destruction on the double belt press.
  • the actual press infeed i.e. At the beginning of the press section, the upstream roll experiences a certain load, which is monitored by the sensor device. If there is an over-scatter with the scatter or the mat or the stack of the starting material, i.e. a thickening of the starting material, the load on the roll rises above a certain predetermined threshold value, whereupon an alarm is triggered, for example the press is stopped immediately, so that the thickening does not get into the inlet of the press section and into it itself and there the can cause said destruction.
  • roll for the feed belt upstream of the inlet mouth is intended to include various alternatives.
  • the roller is nothing more than a front deflection roller of a press belt, in particular the upper press belt in a horizontal press.
  • the deflection roller takes part in the compaction and is not only exposed to the horizontal tensile forces of the press belt, but also to the vertical compaction forces, which increase sharply when approaching over-scattering and trigger the alarm via the
  • Trigger sensor device
  • support rollers are provided which can be adjusted against the free section of the press belt between the front deflection roller (in particular the upper one) and the inlet of the press section and whose contact forces can be detected.
  • the detection of these contact forces can be carried out in various ways known per se, for example by means of various force or pressure sensors or by means of strain gauges which are attached to the supports of the "roller" and which allow a conclusion to be drawn about the forces.
  • the preferred embodiment of the "alarm” consists in stopping the drive of the press belts according to claim 5.
  • rapid ventilation of at least the entrance area of the double belt press is also conceivable, but this is much more difficult to implement than stopping the double belt press.
  • 1 and 2 show partial side views of the inlet area of the double belt press.
  • the double belt press 100 of FIG. 1 comprises an upper press belt 1 and a lower press belt 2, which are horizontal in the mutually facing strands
  • the press belts 1, 2 each run endlessly over pairs of deflection rollers, one of which also takes over the drive and of which only the deflection rollers 4, 5 located in the inlet area are shown in the drawing, which in the exemplary embodiments lie in a vertical plane E. and a kind Form roll gap 20.
  • the strands of the press belts 1, 2 which delimit them are supported from the outside - seen perpendicular to their plane - by flat heating plates 6, 7, which in turn are deposited on a support structure (not shown) against the forces occurring.
  • rotating roller chains are provided, which are also not shown.
  • an inlet mouth 3 ' is formed, in which the heating plates 6, 7 gap somewhat.
  • Heating plate 6 'curved slightly upwards.
  • a bed 9 of small-sized starting material such as wood shavings or wood fibers is applied, which is compressed in the inlet area in the manner indicated in the drawing to a fifth or a sixth of its initial thickness.
  • the two deflecting rollers 4, 5 already take over a substantial part of the compression, which is then continued in the inlet mouth 3 '.
  • the bed 9 then runs into the actual pressing section 3, where the final calibration and curing of the starting material
  • the bed 9 may have so-called over-scattering, ie thickening of the bed occurring in certain local areas of the surface, in which more material is present and which is therefore more difficult to the extent given by the spacing of the forming strips 1, 2 perpendicular to their surface in the pressing section 3 are to be pressed together.
  • over-scattering ie thickening of the bed occurring in certain local areas of the surface, in which more material is present and which is therefore more difficult to the extent given by the spacing of the forming strips 1, 2 perpendicular to their surface in the pressing section 3 are to be pressed together.
  • the increase in force that occurs when the bed 9 is compressed to the predetermined thickness can damage the shaped belts 1, 2, the roller chains supporting them in the pressing section 3, the heating plates 6, 7 and the deflecting drums 4, 5, which, too get the drive of the press belts 1, 2.
  • the forces occurring are monitored in the entrance area of the press.
  • the press belts 1, 2 run essentially freely, ie without external support, and are accordingly exposed to the forces of the bed 9.
  • 2 support rollers 16, 17 are arranged under the press belt, opposite which support rollers 18, 19, which act from the outside on the upper press belt 1, are located at the same point, as seen in the running direction of the strand 10.
  • the support rollers 16, 18 and 17, 19 each form a type of roll gap between them, in which the material of the bed 9 is additionally compressed between the deflection rollers 4, 5 and the inlet mouth 3 '.
  • the compression takes place by means of hydraulic piston / cylinder units 20, 20, which experience a certain pressure when the double belt press 200 runs normally. If over-scattering occurs, the back pressure of the bed 9 larger and a higher hydraulic pressure is required to hold the support rollers 18, 19 in the same place. This pressure increase is detected by pressure transducers 21, 21 and fed back via lines 11, 12 as an electrical signal to the force measuring device 13, which is connected via a line 14 to the control device 15, which triggers the emergency stop if necessary.
  • the deflection rollers 4, 5 are also vertically one above the other in the double belt press 200, although this would not be necessary here.
  • the deflecting roller 5 could therefore also be located further to the left, and the filling could be applied immediately to the press belt 2, which extends further to the left.
  • the forces in the gap 20 between the deflection rollers 4, 5 are used for control and the deflection rollers 4, 5 must therefore be arranged one above the other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Press Drives And Press Lines (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne une presse à double bande (200) destinée à la fabrication de panneaux de particules et similaires, ladite presse comportant une sécurité permettant de limiter la quantité de matériau en vrac (9) introduite dans la section de pressage (3) et donc d'éviter des dommages causés par des pics de pression dans ladite section de pressage. Dans le cas de rouleaux d'appui superposés (4, 5), ladite sécurité peut comporter sur le côté d'entrée de la presse à double bande (200), un moyen de détection des forces exercées entre les rouleaux de déviation superposés (4, 5). Il est également possible de disposer des rouleaux d'appui hydrauliques supplémentaires (18, 19) s'appuyant hydrauliquement, entre les rouleaux de déviation (4, 5) ne devant plus être superposés, et l'orifice d'entrée (3'), et de faire intervenir la pression dans l'appui hydraulique pour déconnecter l'entraînement des bandes de presse (1, 2).
PCT/EP2001/005980 2000-06-28 2001-05-25 Presse a double bande Ceased WO2002000422A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU63940/01A AU6394001A (en) 2000-06-28 2001-05-25 Double-band press

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10031551.8 2000-06-28
DE2000131551 DE10031551C2 (de) 2000-06-28 2000-06-28 Doppelbandpresse

Publications (1)

Publication Number Publication Date
WO2002000422A1 true WO2002000422A1 (fr) 2002-01-03

Family

ID=7647125

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/005980 Ceased WO2002000422A1 (fr) 2000-06-28 2001-05-25 Presse a double bande

Country Status (3)

Country Link
AU (1) AU6394001A (fr)
DE (1) DE10031551C2 (fr)
WO (1) WO2002000422A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005049880B4 (de) * 2005-10-17 2017-06-08 Dieffenbacher GmbH Maschinen- und Anlagenbau Verfahren zum Schutz der Maschinenelemente einer kontinuierlich arbeitenden Presse und kontunierlich arbeitende Presse zur Durchführung des Verfahrens

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10253657A1 (de) * 2002-11-16 2004-05-27 Maschinenfabrik J. Dieffenbacher Gmbh & Co Sicherheitseinrichtung für eine kontinuierlich arbeitende Presse

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3907473A (en) * 1972-04-07 1975-09-23 Baehre & Greten Continuous presses
US4029456A (en) * 1974-10-31 1977-06-14 Eduard Kusters Maschinenfabrik Rapid load-relieve device for continuous press
US5042372A (en) * 1989-06-08 1991-08-27 Maschinenfabrik J. Dieffenbacher Gmbh & Co. Continuously working press
DE19810553A1 (de) * 1998-03-11 1999-09-16 Dieffenbacher Gmbh Maschf Sicherheitseinrichtung für kontinuierlich arbeitende Pressen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2157746C3 (de) * 1971-11-22 1978-10-05 Eduard Kuesters, Maschinenfabrik, 4150 Krefeld Presse zur Ausübung einer Flächenpressung
DE2211724B2 (de) * 1972-03-10 1976-12-02 Bison-Werke Bahre und Greten GmbH & CoKG, 3257 Springe Rollentaster zum messen und zur abgabe von steuerungsimpulsen an eine nachgeordnete steuerungseinrichtung einer kontinuierlich arbeitenden maschine zur herstellung von span- und/oder faserplatten konstanter dicke
DE3725383C1 (de) * 1987-07-31 1988-12-01 Siempelkamp Gmbh & Co Anlage fuer das Heisspressen von Pressgutmatten bei der Herstellung von Spanplatten,Faserplatten u.dgl.
DE3918755C2 (de) * 1989-06-08 1998-08-27 Dieffenbacher Gmbh Maschf Kontinuierlich arbeitende Presse
DE19829741C1 (de) * 1998-07-03 1999-08-26 Siempelkamp Gmbh & Co Verfahren und Presse zum Verpressen, insbesondere kontinuierlichen Verpressen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3907473A (en) * 1972-04-07 1975-09-23 Baehre & Greten Continuous presses
US4029456A (en) * 1974-10-31 1977-06-14 Eduard Kusters Maschinenfabrik Rapid load-relieve device for continuous press
US5042372A (en) * 1989-06-08 1991-08-27 Maschinenfabrik J. Dieffenbacher Gmbh & Co. Continuously working press
DE19810553A1 (de) * 1998-03-11 1999-09-16 Dieffenbacher Gmbh Maschf Sicherheitseinrichtung für kontinuierlich arbeitende Pressen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005049880B4 (de) * 2005-10-17 2017-06-08 Dieffenbacher GmbH Maschinen- und Anlagenbau Verfahren zum Schutz der Maschinenelemente einer kontinuierlich arbeitenden Presse und kontunierlich arbeitende Presse zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
DE10031551C2 (de) 2003-03-27
DE10031551A1 (de) 2002-01-17
AU6394001A (en) 2002-01-08

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