EP0901894B1 - Verfahren und Presse zum Verpressen, insbes. kontinuierlichen Verpressen - Google Patents

Verfahren und Presse zum Verpressen, insbes. kontinuierlichen Verpressen Download PDF

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Publication number
EP0901894B1
EP0901894B1 EP98117029A EP98117029A EP0901894B1 EP 0901894 B1 EP0901894 B1 EP 0901894B1 EP 98117029 A EP98117029 A EP 98117029A EP 98117029 A EP98117029 A EP 98117029A EP 0901894 B1 EP0901894 B1 EP 0901894B1
Authority
EP
European Patent Office
Prior art keywords
press
input
mat
setting
contour
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
EP98117029A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0901894A2 (de
EP0901894A3 (de
Inventor
Horst Weiss
Lothar Dipl.-Ing. Sebastian
Klaus Dipl.-Ing. Schürmann
Werner Gawlitta
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.)
Siempelkamp Maschinen und Anlagenbau GmbH and Co KG
Original Assignee
Siempelkamp Maschinen und Anlagenbau GmbH and Co 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27217743&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0901894(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19740325A external-priority patent/DE19740325C5/de
Priority claimed from DE19829742A external-priority patent/DE19829742C1/de
Priority claimed from DE19829741A external-priority patent/DE19829741C1/de
Application filed by Siempelkamp Maschinen und Anlagenbau GmbH and Co KG filed Critical Siempelkamp Maschinen und Anlagenbau GmbH and Co KG
Priority to EP03020741A priority Critical patent/EP1371466B1/de
Publication of EP0901894A2 publication Critical patent/EP0901894A2/de
Publication of EP0901894A3 publication Critical patent/EP0901894A3/de
Application granted granted Critical
Publication of EP0901894B1 publication Critical patent/EP0901894B1/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
    • 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
    • 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

Definitions

  • the invention relates to a method for pressing Pressed goods mats for pressed goods boards in the course of production of chipboard, fiberboard and other wood-based panels in a continuous press with an inlet side cantilevered highly flexible inlet plates, which form an inlet mouth, being on the upper / or lower Inlet plate for setting an inlet contour of the inlet mouth arranged in a given distribution and against Press upper part and / or lower press part supported cylinder-piston arrangements are articulated via a hydraulic system with a connected control device be operated.
  • German patent application 197 40 325 A method of the type described at the outset is generally described in German patent application 197 40 325.
  • the setting of the input contour of the input aperture by means of a device is also the subject of German Patent Specification 44 33 641 and the German O ffenlegungsschrift 195 18 879th
  • a press with press plates that immediately or indirectly with the interposition of a spar are connected to working cylinder piston assemblies that in turn are supported on the press frame.
  • the invention has for its object a method of in the manner described at the beginning, that taking into account as optimally as possible Run-in conditions for a mat to be pressed damage in various operating conditions Inlet mouth, for example, due to impermissibly high Pressure build-up can be reliably avoided.
  • a particularly suitable device for carrying out can be specified.
  • the invention teaches in one Generic method that the inlet contour in Dependence on at least the respective Press material properties, the respective mat height, the respective scattering density of the pressed material, possibly one Prepress setting and the one to be generated Plate thickness preselected and by means of at least one Deformation of the upper / lower inlet plate and plate deformation measuring device connected to the control device controlled or regulated and is monitored.
  • several plate strain gauges are used used, it being in this regard by at least in a given distribution on the one hand on the upper and / or lower inlet plate arranged plate deformation sensors, e.g. B. strain gauges, and between the upper and lower inlet plates effective nip displacement sensor can act.
  • the setting and monitoring of The inlet contour of the inlet mouth is usually made continuously during the operation of the press. From the Deformation of the inlet mouth or the set one The inlet contour of the inlet mouth can be made from this resulting pressures in the to be pressed Determine or estimate the material to be pressed. In doing so regularly the deformation of the intake mouth and the resulting resulting pressures in the to be pressed Pressed mats for admissibility and / or plausibility checked in the control device. Only after Be released by the control device corresponding control signals to the cylinder-piston arrangements to adjust the inlet contour of the Enema mouth transmitted.
  • this is the inlet mouth in individual Areas or sections are subdivided for this purpose the press pressure resulting from the inlet contour is calculated. Provided this pressure to allow deformation of the material to be pressed or the pressed material mats corresponds and also Damage to the intake mouth caused by the material to be pressed adjusting back pressure are not to be feared approval by the control device.
  • This Release causes the cylinder-piston assemblies to be a undertake appropriate deformation of the mouth. Of course, in the event that a reliable Deformation is already set, no adjustment of the Cylinder-piston arrangements carried out.
  • the intake contour of the intake mouth is regularly during operation of the press continuously by means of the Deformation measuring device detected and together with the presses in the material to be pressed Admissibility and / or plausibility checked. For the Case that these values are outside a definable Admissible range, this is already done addressed pressure-free switching of the cylinder-piston arrangements or a corresponding correction or Setting the inlet contour of the mouth.
  • As part of the invention is finally, preferably the entire press area, so the mouth and the itself adjoining heated press plates, too monitor. Of course you can Inlet plates heated in the area of the inlet mouth be executed.
  • the invention also relates to a press Claim 11.
  • Advantageous embodiments of this Press are described in claims 12 to 20.
  • the advantages achieved by the invention are in essential to see that on the one hand optimal Running-in conditions for the mats to be pressed taking into account various operating conditions, especially with regard to a changing structure of the Allow the pressed material mat to set, on the other hand damage the mouth like the one following it Press plates can be reliably avoided.
  • optimal Running-in conditions are such within the scope of the invention Understand prerequisites that are reaching high (Time) gradients for the path, the speed and / or allow acceleration of the mat to be pressed. In other words, it should be as possible in the area of the mouth optimal values for the compression with regard to the path and Changes in speed (per unit of time) and thus of acceleration can be achieved.
  • Deformation of the pressed material mat in the course of running in can be estimated either externally with a mat of deformation material or as it were internally with you Deformation model to be worked.
  • This deformation model takes into account the initial parameters of the mat, such as B. spreading weight, dumping height as possibly pre-compression.
  • B. spreading weight, dumping height as possibly pre-compression.
  • the moisture content of the Pressed chips are taken into account.
  • FE calculations finite element calculations
  • the invention further relates to a continuous press for pressing pressed material mats to form pressed material plates, with a press lower part and upper press part, in the press lower part and upper press part endlessly rotating steel press belts, wherein at least one press plate is arranged in each case in the lower press part and in the upper press part, the steel press belts are supported on the press plates with the interposition of rolling elements, wherein a plurality of cylinder piston arrangements, in particular differential cylinders, are connected in a predetermined distribution to the upper and / or lower press plate to form a pressure system, each with one or more displacement transducers, and are supported against the upper press part and / or lower press part, in order to adjust the press plates.
  • a hydraulic system with a control or regulating device and a computer being connected to the cylinder piston arrangements.
  • the invention is based on the further object continuous press of the above To create embodiment, which is always optimal conditions for the mats to be pressed let adjust and the settings of the press plates and / or inlet plates on their admissibility without constructive effort can be checked.
  • the invention solves this problem with a generic one continuous press in that the computer with the Displacement transducers and / or the relevant pressure system as Monitoring computer communicates, which is dependent from the respective press plate setting or -endposition resulting from the press plate distance and / or Press plate pressure resulting tensions on plausibility and possible overload of the concerned Press plate (s) and (only) the permissible if permitted releases selected press plate setting or end position.
  • the invention provides that the computer with the transducers and / or the pressure system concerned as Monitoring computer communicates, which is dependent of the set inlet contour from the inlet plate distance and / or inlet plate pressure resulting tensions on plausibility and possible Checks overload of the inlet plate (s) concerned and (only) if permitted, the set inlet contour releases.
  • a system which is initially for each press plate and / or inlet plate certain standard settings in a database for the knows individual plate types. Will a variation of Press plate setting and / or inlet contour desired, an operator can adjust this press plate and / or adjust the inlet contour.
  • resulting deformations of the press plates and / or inlet plates to the machine control of the Press released according to the invention will Permissibility of the desired positions with the help of the monitoring computer and checked a suitable program.
  • this review does not only include those to be expected Deformation of the press plates and / or inlet plates one, but it will also be the one from the pressing press mats to be expected included to assess admissibility.
  • Press plate setting and / or inlet contour are the Control values for the individual cylinder piston arrangements Approved.
  • the data of the displacement transducer will be read back continuously and continuously on admissibility checked. So a condition can be recognized immediately which to damage the press plates and / or Leads plates. In such a case Depressurization and emergency exit.
  • Permissibility of the inlet contour setting the corresponding Pass on setpoints to the downstream press plates There is also the possibility in the case of Permissibility of the inlet contour setting the corresponding Pass on setpoints to the downstream press plates. Consequently, the concept according to the invention can be the entry monitoring on the entire press and consequently also transfer their press plates.
  • the invention further provides that the monitoring computer with permissible pressure plate setting and / or setting the inlet contour a limit for the press plate setting and / or the inlet contour depending on the respective mat height, the respective mat material (Span, MDF, OSB) and / or the selected final plate thickness determined. So far one can correct impermissible setting and a permissible one Attitude of the respective operator in Cause dependence on various parameters. The also applies to the driving style of the press. In this There is also the possibility that the Monitoring computer if the setting of the Press plates and / or the inlet contour a limit for the mat height and / or the mat material and / or the Final plate thickness while maintaining the selected press plate setting and / or the set inlet contour determined.
  • the Monitoring computer with impermissible pressure plate setting and / or setting the inlet contour also a limit value for mat speed and mat acceleration while maintaining the pressure plate setting and / or Determine the set inlet contour.
  • a limit value for the mat height and / or the mat material detected In this case inevitably also a limit value for the mat height and / or the mat material detected.
  • a continuous press 1 is shown in FIGS. 1 to 3 for pressing pressed material mats 2 into pressed material plates in In the course of the production of chipboard, fiberboard and other wood-based panels.
  • This press 1 has a press lower part 3 and a press upper part 4, namely in the lower press part 3 and upper press part 4 endlessly circulating steel press belts 5 and with a Inlet jaw E.
  • a heatable press plate 6, 7 is arranged, of which the upper press plate according to the embodiment 6 against the lower press plate 7 for setting a Press gap S is adjustable. Press plates 6, 7 cantilevered, highly flexible, heatable inlet plates 8, 9 under Formation of the inlet mouth E.
  • the steel sheet press belts 5 are on the press plates 6, 7 and the inlet plates 8, 9 with the interposition of Rolling elements 10 or roller rods supported. Further finds a device 11 for adjusting the inlet mouth E and a device 12 for adjusting the inlet contour of the inlet mouth E.
  • the device 12 for adjusting the Inlet contour of the inlet mouth E has a plurality of double-acting cylinder-piston arrangements, in Embodiment differential cylinders 13 on.
  • the Differential cylinders 13 are in a predetermined distribution and according to the embodiment on the one hand on the upper Inlet plate 8 and / or on the lower inlet plate 9 hinged. On the other hand, the differential cylinders are 13 against the upper press part 4 and / or the lower press part 3 supported.
  • the differential cylinders 13 are not one Hydraulic system shown and a control device 17 connected.
  • a plate deformation measuring device 14 scanning optical sensor, e.g. B. a video camera, or to provide a light source / detector device.
  • press nip transducers 15 and / or deformation sensors 16 combined become.
  • the plate deformation measuring device always allows 14 the preferably computer-aided recording and Preparation of the inlet contour of the inlet mouth E, namely regardless of how this plate strain gauge 14 is constructed in detail. This succeeds ultimately in that the plate deformation measuring device 14 or according to the embodiment Press nip displacement sensor 15 in combination with the Strain gauges 16 to the control device 17 are connected. This applies according to the above Designs also for the cylinder-piston arrangements or Differential cylinder 13.
  • the control / regulating device 17 selectable inlet contours of the Inlet mouth E and monitors the inlet contour continuously while the press is operating 1.
  • An external material mat deformation measuring device is not shown to determine the through the Inlet contour of the inlet mouth E expected Preßgutmattenverformung.
  • This molding mat deformation is rather extrapolated in the control device 17, based on the initial parameters during production the mat, z. B. spreading weight, dumping height and possibly prepress pressure. From this can be expected Determine the back pressure of the mat 2.
  • the deformation of the inlet mouth E and the resulting press nips and thus the press pressures in the material to be pressed 2 are shown with the aid of an example in FIG. 2.
  • the inlet mouth E is shown enlarged, with values for the respective press nip h 0 to h 7 .
  • These press gap measured values can be determined with the help of the press gap displacement sensors 15 and / or strain gauges 16.
  • the in Fig. 2 Determine the associated gap widths specified. An original thickness of the pressed material mat 2 of 100 mm was assumed.
  • the inlet contour of the inlet mouth E is during the Operating the press 1 continuously by means of the Deformation measuring device 14 or with the help of the press nip displacement sensor 15 and / or the strain gauge 16 is detected and together with the pressures in the Pressed material mat 2 for admissibility and / or plausibility checked. If the aforementioned values outside of a The piston / cylinder arrangements 13 from the control device 17 depressurized and / or there is a corresponding Adjustment of the intake mouth E. Within the scope of the invention it, the entire press area, d. H. both the Inlet plates 8, 9 as well as the pressure plates 6, 7 and that Monitor inlet mouth E and press nip S.
  • the inlet contour of the inlet mouth E is first set, for example, depending on the mat 2 to be pressed. In other words, based on the composition and structure of the pressed material mat 2, in the simplest case a radius R is specified for the inlet mouth E (target values). This is followed by a measurement of the actual press nip, ie the determination of the values h 0 to h 7 . These, as it were, actual values are compared with the target values (see above) given by the plate thickness, scatter density, etc. and, after checking for admissibility, either changed or written into the database as new target values.
  • control device 17 In the event that permissible values are present, the control device 17 is released. The cylinder / piston assemblies 13 are controlled accordingly and the mat 2 is fed. Following this, the position of the mat to be pressed is continuously checked. This also applies to the loop running through at the beginning. If inadmissible values for the press nip or the press pressure are determined, the press 1 is depressurized.
  • the computer stands with the displacement sensors 20 and / or the relevant printing system as a monitoring computer 19 in Connection.
  • the monitoring computer 19 checks depending on of the set inlet contour from the inlet plate distance and / or inlet plate pressure resulting tensions on plausibility and possible Overloading of the inlet plate (s) 8, 9 in question
  • the monitoring computer 19 gives the permissibility in each case set inlet contour free.
  • the displacement transducers 16 always allow the computer-assisted Detection and preparation of the intake contour of the intake mouth E and are to the control device 18 connected.
  • This also applies to the exemplary embodiment for the cylinder piston arrangements or differential cylinders 13, which belong to the printing system.
  • the Control device 18 each set Inlet contours of the inlet mouth E realized checking their admissibility using the corresponding programmed monitoring computer 19. If the from the Setting the inlet contour of the inlet mouth E resulting tensions of the inlet plates 8, 9 outside of the permissible range, the cylinder piston arrangements or differential cylinder 13 depressurized connected. It is within the scope of the invention, the entire Press area, d. H. both the inlet plates 8, 9 and the press plates 6, 7 and the inlet mouth E and Press gap S to monitor.
  • this cylinder piston assembly 21 is also not a Hydraulic system shown with a control or Control device 23 and a computer 24 are provided.
  • the Computer stands with the displacement transducers 22 and / or the relevant printing system as monitoring computer 24 in Connection that depends on the particular Press plate setting or end position resulting from the Press plate spacing and / or press plate pressure resulting Tensions on plausibility and possibly overloading the concerned press plate (s) 6 or 7 and only at Permissibility of the selected press plate setting releases or end position.
  • the monitoring computer 19 for the setting of the inlet contour can also be used as Monitoring computer for press plate setting or -endposition be used so that one with a Monitoring computer 19 or 24 needs.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Press Drives And Press Lines (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Control Of Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
EP98117029A 1997-09-13 1998-09-09 Verfahren und Presse zum Verpressen, insbes. kontinuierlichen Verpressen Expired - Lifetime EP0901894B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03020741A EP1371466B1 (de) 1997-09-13 1998-09-09 Kontinuierliche Presse zum Verpressen

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE19740325A DE19740325C5 (de) 1997-09-13 1997-09-13 Kontinuierliche Presse zum Verpressen von Preßgutmatten zu Preßgutplatten
DE19740325 1997-09-13
DE19829742 1998-07-03
DE19829742A DE19829742C1 (de) 1998-07-03 1998-07-03 Kontinuierliche Presse
DE19829741A DE19829741C1 (de) 1998-07-03 1998-07-03 Verfahren und Presse zum Verpressen, insbesondere kontinuierlichen Verpressen
DE19829741 1998-07-03

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP03020741A Division EP1371466B1 (de) 1997-09-13 1998-09-09 Kontinuierliche Presse zum Verpressen

Publications (3)

Publication Number Publication Date
EP0901894A2 EP0901894A2 (de) 1999-03-17
EP0901894A3 EP0901894A3 (de) 1999-05-12
EP0901894B1 true EP0901894B1 (de) 2004-11-24

Family

ID=27217743

Family Applications (3)

Application Number Title Priority Date Filing Date
EP03020741A Expired - Lifetime EP1371466B1 (de) 1997-09-13 1998-09-09 Kontinuierliche Presse zum Verpressen
EP98117030A Expired - Lifetime EP0909620B1 (de) 1997-09-13 1998-09-09 Kontinuierliche Presse zum Verpressen von Pressgutmatten zu Pressgutplatten
EP98117029A Expired - Lifetime EP0901894B1 (de) 1997-09-13 1998-09-09 Verfahren und Presse zum Verpressen, insbes. kontinuierlichen Verpressen

Family Applications Before (2)

Application Number Title Priority Date Filing Date
EP03020741A Expired - Lifetime EP1371466B1 (de) 1997-09-13 1998-09-09 Kontinuierliche Presse zum Verpressen
EP98117030A Expired - Lifetime EP0909620B1 (de) 1997-09-13 1998-09-09 Kontinuierliche Presse zum Verpressen von Pressgutmatten zu Pressgutplatten

Country Status (5)

Country Link
US (2) US6098532A (zh)
EP (3) EP1371466B1 (zh)
CN (2) CN1076258C (zh)
CA (2) CA2244283C (zh)
DE (2) DE59810212D1 (zh)

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EP0909620A3 (de) 1999-05-19
EP0901894A2 (de) 1999-03-17
US6142068A (en) 2000-11-07
CN1188259C (zh) 2005-02-09
DE59812293D1 (de) 2004-12-30
DE59810212D1 (de) 2003-12-24
US6098532A (en) 2000-08-08
CA2244284C (en) 2002-05-28
CA2244284A1 (en) 1999-03-13
CN1224651A (zh) 1999-08-04
EP1371466A1 (de) 2003-12-17
EP0909620B1 (de) 2003-11-19
EP0909620A2 (de) 1999-04-21
CA2244283A1 (en) 1999-03-13
CN1076258C (zh) 2001-12-19
EP0901894A3 (de) 1999-05-12
EP1371466B1 (de) 2011-06-29
CN1224650A (zh) 1999-08-04
CA2244283C (en) 2003-07-29

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