EP0065582B1 - 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
EP0065582B1
EP0065582B1 EP81103987A EP81103987A EP0065582B1 EP 0065582 B1 EP0065582 B1 EP 0065582B1 EP 81103987 A EP81103987 A EP 81103987A EP 81103987 A EP81103987 A EP 81103987A EP 0065582 B1 EP0065582 B1 EP 0065582B1
Authority
EP
European Patent Office
Prior art keywords
press
press plate
plate
frame
pistons
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
EP81103987A
Other languages
German (de)
English (en)
Other versions
EP0065582A1 (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 DE8181103987T priority Critical patent/DE3170376D1/de
Priority to EP81103987A priority patent/EP0065582B1/fr
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 chipboard press with spaced frames, through which an upper press plate and a lower press plate extend, the lower press plate being mounted on a plurality of hydraulically operated pistons, which are arranged on the lower transverse webs of the frame, and wherein one heating plate each is arranged on the upper and on the lower press plate.
  • a press for exerting surface pressure in which 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 whose distance is continuously reduced, 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.
  • jacking means are absolutely necessary in this continuous press, which, as roller chains, loop around the upper and lower heated, movable press plate (DE-PS 2 242 399).
  • roller chains With such presses, it is inevitable that the roller chains leave indentations on the chipboard to be pressed and, in addition, considerable effort is required to keep the thickness of the press gap constant, since the constant keeping is done by a hydraulic control. Even a design of roller chains, according to DE-AS 2 545 624, 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.
  • the hot plate press consisting of a movable and a fixed press beam, between which one or more pairs of heatable and coolable press plates are arranged, with cylinder piston arrangements receiving on the long sides of the press beams Press stands are provided from 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 connected to the same hydraulic circuit as the hydraulically effective cross sections are coordinated that a load-dependent deflection of the press plates is avoided, could not be a simple manageable control of the required press plate distance for the production of a Chipboard made of a chip fleece with a practically constant thickness due to the hydraulic control of both press plates.
  • a central multi-piston press with mechanical adjustment has become known from CH-A-182 778, the disclosure of which was used to form the preamble of the present invention.
  • This central multi-piston press with mechanical adjustment is used for gluing veneer or shut-off goods and therefore requires that the upper and lower parts of the press bend in order to achieve secure gluing of the veneer from the inside to the outside. However, as stated above, such a thing would lead to rejects.
  • the present invention is based on the object of proposing a press, whereby the guarantee is given that mutually influencing errors are avoided by hydraulic control of the press plates and a chipboard of constant thickness is produced.
  • This object is achieved in that the upper press plate is suspended from the frame by means of hydraulic cylinders and that between it and the upper crossbar of the respective frame, a support structure is provided which is adapted to the respective plate thickness to be produced, and which is supported by the cylinders mentioned against the upper crosspieces of the frame is pressed, the support structure extending across the width of the upper press plate.
  • the support structure consist of a plurality of honeycombs provided with plane-parallel end faces.
  • a light design 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, namely wedges, step wedges, threaded spindles, racks.
  • the group of honeycombs, wedges and step wedges each have flat, parallel end surfaces 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 positively connected to the frame and the spar by means of the small number of hydraulic pistons by clamping or the press plate connected.
  • the small number of hydraulically operated pistons creates the specific distance between the frame and the pressed plate and then fixes and locks this distance by moving the threaded spindles in nuts or the racks on pinions.
  • the invention thus enables the pressing of a particle board fleece into particle boards, with a discontinuously operating press in a lightweight construction, which is preferably designed 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 of the amount of press oil to be kept is achieved.
  • the press pistons holding the upper heatable press plate are first extended to their maximum stroke provided for this case.
  • the upper heatable press plate thus lies on the chip fleece with a certain pre-pressure.
  • the chip fleece is pressed further with practically light pressure in a honeycomb structure 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.
  • 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 attached to attachment points 4, 5 of the frame 1. It is completely 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 a pair of upper pistons 2, 3 is arranged on every fifth frame.
  • the frames 1 are evenly aligned on an inner side 7 on which a support structure 8 can be placed, over the entire length of the frame press and also over its width, for example by planing.
  • the upper pistons 2, 3, which represent the small number of hydraulically actuated pistons, are first fed via an oil reservoir 12, press oil via lines 13, 14.
  • the heatable upper press plate 6 moves into a position shown in dashed lines with its underside 15.
  • 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 maintained as the zero position for the subsequent final pressing.
  • a displacement 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 heatable 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 in such a way that, depending on the desired pressure profile, a parallel position of the lower, heated press plate 11, to the upper, heated press plate Press plate 6, is observed.
  • a column press is shown from a press, which consists of several column presses arranged one behind the other, in which the same components as in Fig. 1 are given the same numbering.
  • a support structure 8 is inserted between the upper fixed yoke 31 and the spar 18 and the final pressing process of the lower plurality of hydraulically actuated pistons 9 - of which approximately 500 are available with a press plate size of 2500-8000 millimeters - against the underside 15 of the locked heatable upper press plate.
  • 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)

Claims (2)

1. Presse pour panneaux de particules comportant des châssis (1) disposés à distance les uns des autres, à travers lesquels s'étendent un plateau de serrage supérieur (18) et un plateau de serrage inférieur (11), le plateau de serrage infé rieur étant placé sur une pluralité de pistons (9) actionnés hydrauliquement, qui sont disposés sur les traverses inférieures du châssis (1) et un plateau chauffant respectif étant disposé tant au contact du plateau de serrage supérieur que du plateau de serrage inférieur, caractérisée en ce que le plateau de serrage supérieur (18) est suspendu sur le châssis (1) au moyen de cylindres hydrauliques (2, 3), et en ce qu'entre celui-ci et la traverse supérieure du châssis (1) respectif se trouve une structure de soutien adaptée à l'épaisseur de panneau à produire dans chaque cas. qui est appuyée par les cylindres (2, 3) précités contre les traverses supérieures du châssis (1). la structure de soutien s'étendant sur la largeur du plateau de serrage supérieur (18).
2 Presse selon la revendication 1, caractérisée en ce que la structure de soutien (8) pouvant être fixee avec concordance de forme comprend une pluralité de nids d'abeilles à surfaces terminales planes parallèles.
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
DE8181103987T DE3170376D1 (en) 1981-05-23 1981-05-23 Particle board press provided with frames spaced from each other
EP81103987A EP0065582B1 (fr) 1981-05-23 1981-05-23 Presse pour panneau de copeaux avec des cadres disposés à distance les uns des autres
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 EP0065582A1 (fr) 1982-12-01
EP0065582B1 true 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)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4457072A (en) * 1982-04-07 1984-07-03 Mts Systems Corporation Crosshead and bolster spacing control for servo controlled press
EP0800902B1 (fr) * 1996-04-11 2002-03-06 Dieffenbacher Schenck Panel GmbH Procédé pour fabriquer en continu d'un mât pour panneaux en bois ou en matériau similaire
KR101304149B1 (ko) * 2010-09-27 2013-09-05 (주)엘지하우시스 3차원 패턴 형성용 성형 몰드 및 이를 이용한 가전제품 외장재 제조 방법
CA2930102C (fr) * 2015-05-15 2019-09-24 Usnr/Kockums Cancar Company Presse modulaire
ES2986631T3 (es) * 2019-02-01 2024-11-12 Louisiana Pacific Corp Proceso para fabricar y acabar revestimientos de madera de ingeniería mejorados

Family Cites Families (8)

* 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.
US3096545A (en) * 1960-07-20 1963-07-09 Rowland Products Inc Resilient spacer for press-finishing of plastic sheet
FR1548751A (fr) * 1967-03-09 1968-12-06
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

Also Published As

Publication number Publication date
EP0065582A1 (fr) 1982-12-01
FI820640A0 (fi) 1982-02-25
FI73913C (fi) 1987-12-10
DE3170376D1 (en) 1985-06-13
FI73913B (fi) 1987-08-31
US4504207A (en) 1985-03-12

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