EP0065582A1 - Presse pour panneau de copeaux avec des cadres disposés à distance les uns des autres - Google Patents

Presse pour panneau de copeaux avec des cadres disposés à distance les uns des autres Download PDF

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Publication number
EP0065582A1
EP0065582A1 EP81103987A EP81103987A EP0065582A1 EP 0065582 A1 EP0065582 A1 EP 0065582A1 EP 81103987 A EP81103987 A EP 81103987A EP 81103987 A EP81103987 A EP 81103987A EP 0065582 A1 EP0065582 A1 EP 0065582A1
Authority
EP
European Patent Office
Prior art keywords
press
chipboard
press plate
heatable
support structure
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.)
Granted
Application number
EP81103987A
Other languages
German (de)
English (en)
Other versions
EP0065582B1 (fr
Inventor
Dieter Dr.-Ing. Arnold
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.)
Carl Schenck AG
Original Assignee
Carl Schenck AG
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 Carl Schenck AG filed Critical Carl Schenck AG
Priority to EP81103987A priority Critical patent/EP0065582B1/fr
Priority to DE8181103987T priority patent/DE3170376D1/de
Priority to FI820640A priority patent/FI73913C/fi
Priority to US06/378,280 priority patent/US4504207A/en
Publication of EP0065582A1 publication Critical patent/EP0065582A1/fr
Application granted granted Critical
Publication of EP0065582B1 publication Critical patent/EP0065582B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/32—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
    • 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
    • B27N3/20—Moulding or pressing characterised by using platen-presses

Definitions

  • the invention relates to a method for pressing a chip fleece into a particle board by a closing process and a pressing process of the press, and a suitable press for carrying out the method.
  • a press for exerting a surface pressure has become known.
  • several frames arranged one behind the other represent the support structure for a continuous press, and the heatable upper and lower press plates arranged in this support structure are arranged in such a way that their distance continuously decreased to a press nip corresponding to the chipboard thickness, which is controlled over a certain press length by hydraulically operated pistons to a constant thickness.
  • driving means are absolutely necessary in this continuous press, which, as roller chains, loop around the upper and lower heated, movable press plate (DE-PS 22 42 399).
  • roller chains leave indentations on the chipboard to be pressed, and it is also a considerable effort to keep the thickness of the press nip constant, since the constant is done by a hydraulic control.
  • Even a design of roller chains, according to DE-AS 25 45 624, could not prevent the indentations in the surface of the chipboard to be pressed, and also could not prevent the effort for hydraulic control in keeping the gap constant.
  • a discontinuously working hot plate press with self-compensation known from DE-AS 17 o3 296 Renden cylinder piston assemblies wherein the hot plate press consists of a movable and a fixed press spar, between which one or more pairs of heatable and coolable press plates are arranged, on the long sides of the press spars cylinder piston assemblies receiving press stands are provided, each consisting of two columns and a crosshead connecting them, and which is characterized in that compensation pistons are arranged between the fixed and the movable press spar on the one hand, and the associated press plates on the other hand, which are coordinated with each other on the same hydraulic circuit as the hydraulically effective cross sections so that a load-dependent deflection of the press plates is avoided, was also unable to provide a simple, manageable control of the press plate spacing required to produce a chipboard from a chip fleece with a practically constant thickness due to the hydraulic control of both presses effect plates.
  • the present invention has for its object to provide a pressing method and a press, whereby the guarantee is given that mutually influencing errors are avoided by hydraulic controls of the press plates and a chipboard of constant thickness is produced.
  • This object is achieved in that the closing of the press by moving one press plate against the chip fleece and the final pressing of the chipboard by moving the other press plate against the mechanically fixed and locked press plate. This method avoids the mutual coordination between the hydraulic circuits for the one and the other press plate required in the previous pressing processes.
  • This new pressing process creates a particle board with a very high thickness accuracy and by separating it into a closing process and subsequent mecha Niche fixed locking of the one press plate carrying out this process step against which the other press plate, during the pressing process, the second press step, exactly engages with the interposition of the chip fleece to be pressed.
  • Nonwovens are solidified to chipboard by the action of pressure and temperature, characterized in that the heatable a press plate is moved by a small number of hydraulically operated pistons, that a fixable form-fitting support structure can be inserted between the frame and the one heatable press plate, and that the heated other press plate is supported directly on the frame of the press via a plurality of hydraulically actuated pistons and effects the pressing process.
  • the support structure consist of a plurality of honeycombs with plane-parallel end faces.
  • a lightweight construction of the press is achieved which, when using this form-fitting support structure for the upper heatable press plate, brings practically no additional load, so that the upper heatable press plate can also be made thin without the risk of sagging.
  • the following known, height-adjustable support structure components can also be used as a positive support structure, which fixes and fixes the upper press plate, namely wedges, step wedges, threaded spindles, racks.
  • the group of honeycombs, wedges and step wedges each have flat, parallel end faces as contact surfaces, to the press frame and to the spar or to the top of the press plate, then these support structures are each form-fitting with the frame and the Spar or the press plate connected.
  • the small number of hydraulically actuated pistons makes the certain distance manufactured between the frame and the press plate and then fixed and locked this distance by moving the threaded spindles in nuts or the toothed racks on pinions.
  • the height of the form-fitting support structure can be varied depending on the lifting height of the majority of the hydraulically actuated pistons resulting from the desired chipboard thickness. This ensures that even in the production of chipboard or similar boards from different types of wood, different types of chip and different board thickness for the closing process of the press, no complex control of the small number of pistons causing the closing process is required, but only by replacing the support structures in the case of the honeycomb structure against another support structure which represents a greater or lesser fixed interlocking distance, or by changing the height of the same support structure in the case: wedges, step wedges, threaded spindle, rack.
  • the invention thus proposes a method for pressing a particle board fleece into particle board, in which a discontinuously operating press can be used in a lightweight construction, preferably as a one-day press.
  • a discontinuously operating press can be used in a lightweight construction, preferably as a one-day press.
  • the control for the plurality of hydraulic pistons is considerably simplified by the use of known displacement measuring devices which are arranged in or next to the pistons and which can measure the distance between the upper fixed heatable press plate and the lower heatable press plate without reaction; a not insignificant saving in the amount of press oil to be kept is achieved.
  • the press pistons holding the upper heatable press plate become first extended to its maximum stroke intended for this case.
  • the upper heatable press plate then lies on the chip fleece with a certain pre-pressure.
  • the chip fleece is pre-pressed with practically the same pressure and at the same time a stable, flat support surface is created for the subsequent pre-pressing process, which is carried out solely by the several pistons .
  • several frames are arranged one behind the other, the frames being aligned with one another.
  • the following percentage distribution was found to be particularly suitable: 5% small number of hydraulically operated pistons, 95% majority of hydraulically operated pistons.
  • the ratio of the lifting height between the plurality of hydraulically operated pistons and the small number of hydraulically operated pistons was 1: 2. It is understandable that the lifting height between the majority and the small number of hydraulically actuated plungers varies depending on the type of Helz, type of chip, and plate thickness.
  • a frame 1 is shown from a frame press, which consists of a plurality of frames arranged one behind the other.
  • Upper pistons 2, 3 are fastened to fastening points 4, 5 of the frame 1. It is entirely sufficient for moving a heatable upper press plate 6 if an upper piston pair 2, 3 is not arranged on each frame 1. It has proven to be particularly advantageous if an upper piston pair 2, 3 is arranged on every fifth frame.
  • the frames 1 are on an inside 7 on one.
  • Support structure 8 can be applied, aligned over the entire length of the frame press and also over its width, for example by planing.
  • the pressing process is first carried out via an oil reservoir . 12, press oil via lines 13, 14 to the upper pistons 2, 3, which represent the small number of hydraulically actuated pistons. This moves the heated upper press. enplatte 6, in a position shown in dashed lines with its underside 15. As shown in Figure 1, a certain pre-compression of a chip fleece 16 to be pressed is already achieved. Subsequently, the support structure 8, in the exemplary embodiment the honeycomb structure between the inside 7 and the top 17, of the spar 18 carrying the heatable upper press plate 6 is inserted and, by retracting the upper pistons 2, 3, the support structure 8 and the flat underside 15 of the heatable are locked and fixed upper press plate 6 reached. This position of the underside 15 is now used as the zero position for the subsequent finishing maintain pressure.
  • a path measuring device 20 is arranged on each side of the press plate top 19, the lower heatable press plate 11, which during the pressing process the distance between the top 17, the heatable lower press plate 11 and the bottom 15 of the heated upper press plate 6, constantly monitored.
  • a high-pressure hydraulic system 21 which is connected to the plurality of hydraulically actuable pistons 9 via lines 22, is acted on such that, depending on the desired pressure profile, a parallel position of the lower heatable press plate 11 to the upper heatable press plate 6, is complied with.
  • a column press is shown from a press that consists of several column presses arranged one behind the other, in which the components that are the same as FIG.
  • a high-pressure hydraulic system 20 is also connected to the plurality of hydraulically actuated pistons 9 via lines 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (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)
  • Veneer Processing And Manufacture Of Plywood (AREA)
EP81103987A 1981-05-23 1981-05-23 Presse pour panneau de copeaux avec des cadres disposés à distance les uns des autres Expired EP0065582B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP81103987A EP0065582B1 (fr) 1981-05-23 1981-05-23 Presse pour panneau de copeaux avec des cadres disposés à distance les uns des autres
DE8181103987T DE3170376D1 (en) 1981-05-23 1981-05-23 Particle board press provided with frames spaced from each other
FI820640A FI73913C (fi) 1981-05-23 1982-02-25 Spaonskivepress med pao inboerdes avstaond anordnade ramar.
US06/378,280 US4504207A (en) 1981-05-23 1982-05-14 Pressing apparatus for making particleboard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81103987A EP0065582B1 (fr) 1981-05-23 1981-05-23 Presse pour panneau de copeaux avec des cadres disposés à distance les uns des autres

Publications (2)

Publication Number Publication Date
EP0065582A1 true EP0065582A1 (fr) 1982-12-01
EP0065582B1 EP0065582B1 (fr) 1985-05-08

Family

ID=8187731

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81103987A Expired EP0065582B1 (fr) 1981-05-23 1981-05-23 Presse pour panneau de copeaux avec des cadres disposés à distance les uns des autres

Country Status (4)

Country Link
US (1) US4504207A (fr)
EP (1) EP0065582B1 (fr)
DE (1) DE3170376D1 (fr)
FI (1) FI73913C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105344A1 (fr) * 1982-04-07 1984-04-18 Mts System Corp Commande de l'ecartement entre l'equerre et la plateau mobile pour une presse servo-commandee.

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59608838D1 (de) * 1996-04-11 2002-04-11 Dieffenbacher Schenck Panel Verfahren zur kontinuierlichen Herstellung eines Vlieses für die Herstellung von Holzwerkstoff- oder ähnlichen Platten
KR101304149B1 (ko) * 2010-09-27 2013-09-05 (주)엘지하우시스 3차원 패턴 형성용 성형 몰드 및 이를 이용한 가전제품 외장재 제조 방법
CA3051619C (fr) * 2015-05-15 2020-05-19 Usnr/Kockums Cancar Company Presse modulaire
WO2020160552A1 (fr) * 2019-02-01 2020-08-06 Louisiana-Pacific Corporation Procédé de fabrication et de finition d'un bardage en bois d'ingénierie amélioré

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH182778A (de) * 1935-02-14 1936-02-29 Leya A G Maschbau Zentral-Vielkolbenpresse mit mechanischer Verstellung.
FR1548751A (fr) * 1967-03-09 1968-12-06
DE2312177A1 (de) * 1973-03-12 1974-09-19 Wemhoener Kg Heinrich Mehrkolbenpresse fuer die kunstharzbeschichtung grossflaechiger werkstuecke

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096545A (en) * 1960-07-20 1963-07-09 Rowland Products Inc Resilient spacer for press-finishing of plastic sheet
DE1703297A1 (de) * 1968-04-29 1972-02-17 Freudenberg Carl Fa Heizplattenpresse mit selbstkompensierenden Zylinderkolbenanordnungen
US4005967A (en) * 1974-01-14 1977-02-01 The Dow Chemical Company Scrapless forming of plastic articles
DE2545366A1 (de) * 1975-10-09 1977-04-21 Kuesters Eduard Presse zur ausuebung einer flaechenpressung
DE2545624C3 (de) * 1975-10-11 1978-07-27 Kuesters, Eduard, 4150 Krefeld Presse zur Ausübung einer Flächenpressung
US4147486A (en) * 1978-05-08 1979-04-03 The Budd Company Mechanical press for molding plastic parts

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH182778A (de) * 1935-02-14 1936-02-29 Leya A G Maschbau Zentral-Vielkolbenpresse mit mechanischer Verstellung.
FR1548751A (fr) * 1967-03-09 1968-12-06
DE2312177A1 (de) * 1973-03-12 1974-09-19 Wemhoener Kg Heinrich Mehrkolbenpresse fuer die kunstharzbeschichtung grossflaechiger werkstuecke

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105344A1 (fr) * 1982-04-07 1984-04-18 Mts System Corp Commande de l'ecartement entre l'equerre et la plateau mobile pour une presse servo-commandee.
EP0105344A4 (fr) * 1982-04-07 1984-10-29 Mts System Corp Commande de l'ecartement entre l'equerre et la plateau mobile pour une presse servo-commandee.

Also Published As

Publication number Publication date
US4504207A (en) 1985-03-12
FI73913B (fi) 1987-08-31
DE3170376D1 (en) 1985-06-13
EP0065582B1 (fr) 1985-05-08
FI73913C (fi) 1987-12-10
FI820640A0 (fi) 1982-02-25

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