EP0066556B1 - Procédé et dispositif pour presser une feuille mince sur une plaque - Google Patents

Procédé et dispositif pour presser une feuille mince sur une plaque Download PDF

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Publication number
EP0066556B1
EP0066556B1 EP82830139A EP82830139A EP0066556B1 EP 0066556 B1 EP0066556 B1 EP 0066556B1 EP 82830139 A EP82830139 A EP 82830139A EP 82830139 A EP82830139 A EP 82830139A EP 0066556 B1 EP0066556 B1 EP 0066556B1
Authority
EP
European Patent Office
Prior art keywords
vacuum
chamber
pressure
pressing plate
press
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
EP82830139A
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German (de)
English (en)
Other versions
EP0066556A3 (en
EP0066556A2 (fr
Inventor
Valerio Savorgnan
Dino Mio
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT82830139T priority Critical patent/ATE18647T1/de
Publication of EP0066556A2 publication Critical patent/EP0066556A2/fr
Publication of EP0066556A3 publication Critical patent/EP0066556A3/en
Application granted granted Critical
Publication of EP0066556B1 publication Critical patent/EP0066556B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
    • B27D1/083—Presses specially designed for making the manufacture of shaped plywood articles
    • 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
    • B30B5/02—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 a flexible element, e.g. diaphragm, urged by fluid pressure

Definitions

  • the invention relates to a process and relative equipment for veneering through a veneer press thin layers on curve and/or flat surfaces, particularly for production of panels, as for instance the panels for small doors used in furniture production.
  • the equipment could be more particularly applied to the planes of the usual presses for furniture panel production or be the main characteristic of a specific press for non-flat surfaces.
  • a further object of the present invention is a press provided with such equipment or system fit to realize the process constituent the characteristic form of the present invention.
  • the purpose of the present invention is the realization of a new process of veneering or glueing thin layers on panels with variously shaped surface allowing the utilization also with flat surface and furthermore allows the glueing, besides on the larger external surface of the panel, also on the perimetric surfaces and this using low-cost equipments and with a very efficient, profitable process.
  • the invention solves the problem utilizing a veneering method under the effects of the pressure and/or vacuum obtained on a rubber sheet with the pneumatic action of compressed air on one side and the vacuum caused by a vacuum pump on the other side.
  • the intervention times of the pressures through the available temperatures and used materials are regulated by a preferably automatic cycle previously set.
  • Standard equipment according to the invention is more particularly constituted by:
  • This embodiment is to be applied in a press system as above-stated to carry out the pressing of a panel whose surface has to be covered, after being smeared with glue, with a thin covering, like a valuable wood layer or veneer and pressed between the lower pressing plate and the upper pressing plate of the press with the overhanging interposition of said rubber sheet in co-operation with the action of two opposed chambers, an upper one "A” and a lower one "B" respectively, in which through a vacuum action in the upper chamber to suck back and heat the rubber sheet, pressing and vacuum action in the lower chamber or pressure in the upper chamber, the recoil down of the rubber sheet is allowed to make it adhere perfectly to the shape of the panel to cover, shaping in the same way under pressure the veneer, which under said pressure action of the rubber sheet and of the heat will glue on the covered panel surface.
  • Said airtight frame “1" has the shape of a top and bottom opened box supplied with at least one piping 4 for the connection of the inner chamber “A” with the outside for the passage of a fluid which can be put in or taken from the chamber “A” under pressure or depression with suitable means of pressure and vacuum formation (not represented).
  • a flexible and elastic rubber sheet "G” is stretched, which, under the depression action through suction of the air contained in chamber “A” can be deformed as represented in Figure 2 coming elastically in perfect contact and adhesion with the surface of the upper plate 2 of the press.
  • the lower plate of the press which for this purpose can move up and down for the pressing operation 6, is supplied with a piping 7 reentering the inner perimeter of chamber "A” defined by the perimetric frame 1 and furthermore on the movable lower plate 6 there is a support "D” fit to support the panel to be pressed "P” whose upper and lateral external surface has to be covered through the glueing of a wood layer of flexible type "T" as represented in Figure 2.
  • the piping 7 of the lower plate 6 will obviously be connected to the well known means of operating of a pump to realize a depression in the lower chamber "B" which takes place after the pressing operation of Figure 5 between the flexible rubber sheet "G” and the lower plate 6 to get a vacuum action starting from a position as representated in Figure 5 to shape, through the depression action, the rubber sheet "G” as represented in Figure 6; and this with the operating of the depression means which preferably is also suitable for operating in the piping 4 of the upper plate 2 alternatively as follows: operating of the vacuum in the upper chamber "A", pressing, operating of the depression in the lower chamber "B” by vacuum action in the outlet 7 of the lower plate 6 with free atmospheric pressure on the upper chamber "A” or under pressure by means of the inlet realizing with such an operation the glueing under the temperature and pressure action as represented in Figure 6.
  • the upper plate of the press 2 will be brought to a temperature of 95-120°C and in the same way the lower plate of the press will be brought at the same or about at the same temperature, more or less according to the specific requirements.
  • a further system to acclerate the glueing will be carried out through the utilization of inlet of preheated air in such a way to accelerate the glueing and polymerisation system.
  • valves arranged and programmed on purpose with the cycle will reverse the flow of the fluids in the chambers "A” and "B" starting the very step of the glueing of the remaining surfaces which, as already mentioned at the beginning, takes place for the combined action of the pneumatic pressure in the upper chamber “A” and the pneumatic depression in the lower chamber “B” and the mechanical pressure in the upper flat part of the piece.
  • the rubber sheet "G" preheated by contact with the hot parts of the press, lying on the curve surfaces of the piece will carry heat and give this heat to the glueing surfaces of the same piece through the respective wood layer of covering.
  • the compressed and preheated air in the upper chamber "A” will contribute to give heat by the rubber sheet to the curve parts that cannot receive heat from the heated upper plate 2, thus reducing to a minimum the drying and hardening times of the same glue.
  • the pressure of the compressed air will be regulated in accordance to the shape of the pieces and their number; anyhow, the value cannot exceed that of the setting of the highest pressure valve installed on the bag whose values will be calculated on the basis of the mechanical resistances offered by the frame.
  • the automatically piloted electro-valves (not represented but of a well known type) will obviously intervene after a predetermined time reversing the flow of the fluids in the chambers "A" and "B" of the frame and thus setting the rubber sheet in the starting position as said in the condition preceding the pressing, so starting another preheating step of the rubber sheet which will last all the necessary time for discharging the glued pieces and smearing and introducing the new ones.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Laminated Bodies (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Paper (AREA)
  • Catalysts (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Claims (9)

1. Procédé de collage par pressage d'une fine couche (T) sur une surface courbe et/ou plane, spécialement déstiné au revêtement à l'aide de fines couches en bois par collage ou placage des panneaux (P) de meubles, à l'aide d'une presse comportant une plaque de pressage supérieure chauffée (2) et une plaque de pressage inférieure chauffée (6) mobiles en position de pressage, caractérisé en ce qu'un cadre de support étanche à l'air (1) est placé entre lesdites plaques de pressage supérieure (2) et inférieure (6) de la presse et en ce que le cadre support (1) supporte une feuille flexible (G) étirée sur tout le périmètre à l'aide de moyens élastiques d'étirage (5) réalisant ainsi une chambre étanche à l'air (A) avec la plaque de pressage supérieure (2), ladite chambre (A) étant raccordée par une tuyauterie de raccordement (4) sur des dispositifs de mise en pression/vide destinés à fournir des pressions différentes dans ladite chambre (A) comparées à la pression extérieure, le plaquage étant réalisé à partir des operations suivantes:
sur la surface du panneau (P) devant être plaqué la colle est appliquée et la couche (T) est positionnée sur la surface, l'ensemble étant placé sur la plaque de pressage extérieure (6), simultanément ou avant la réalisation du vide dans la chambre (A) pour rappler la feuille flexible (G) sur la surface inférieure de la plaque de pressage supérieure préchauffée 2:
le pressage entre la plaque supérieure et la plaque inférieure respectivement (2 et 6) de la presse, chauffées à cet effet, est réalisé par pressage des pièces à coller (P et T) respectivement entre la plaque inférieure et la plaque supérieure;
le vide dans la chambre supérieure (A) est éliminé et l'air est envoyé sous pression dans la même chambre (A) pour ramener vers le bas ladite feuille flexible (G) sur tout le périmètre du panneau (P) dont la couche (T) doit être collée;
la pression est maintenue à l'état adapté au temps nécessaire à la réalisation du collage, puis la pression dans la chambre supérieure (A) est éliminée et le vide est réappliqué ramenant à nouveau ladite feuille de caoutchouc (G) en contact avec la surface inférieure de la plaque de pressage supérieure (2);
la séparation entre les plaques de pressage, respectivement supérieure (2) et inférieure (6) est effectuée et la pièce collée est retirée et le cycle recommence.
2. Procédé selon la revendication 1 caractérisé en ce que l'air de la chambre supérieure (A) sous pression est chauffée.
3. Procédé selon les revendication 1 et/ou 2, caractérisé en ce que la plaque inférieure (6) est munie d'une tuyauterie de sortie (7) ouvertre dans la zone située sous la chambre inférieure (A) afin de réaliser une liaison avec une chambre circulaire inférieure (B) et reliée par des moyens de mise sous vide pour contribuer au cours de l'opération, après pressage, de mise en pression de l'air dans la chambre supérieure (A).
4. Dispositif, applicable à une presse munie d'une plaque de pressage supérieure chauffée et d'une plaque de pressage inférieure sous la plaque de pressage supérieure, pour permettre la réalisation du procédé décrit dans les revendications précédentes, comportant au moins:
un cadre (1) métallique à la partie inférieure et ouvert à la partie supérieure muni de moyens (3) de raccordement étanches sur la surface inférieure de la plaque de pressage supérieure (2) et de moyens (5) d'étirage élastique et circulaire pour étirer une feuille (G) élastique et flexible reliée d'une manière étanche avec le bord inférieur (8) circulaire du périmètre du cadre (1) pour réaliser une chambre (A) étanche, et équipé d'au moins une tuyauterie (4) destinée au passage d'un fluide;
un dispositif de mise en pression/vide relié à ladite tuyauterie (4) pour réaliser le vide dans ladite chambre (A) ou une pression à un niveau prédéterminé et un temps préréglé;
moyens de contrôle du dispositif de mise en pression/vide permettant d'établir le vide et ainsi de rappeler la feuille (G) élastique et/ou flexible contre la plaque de pressage supérieure supportant le cadre (1) ou pour repousser ladite feuille (G) de la surface de la plaque;
5. Equipement selon la revendication précédente, caractérisé en ce que les moyens de mise en pression/sous vide sont reliés par un sac isolé, un échangeur de chaleur et une pompe à vide.
6. Dispositif selon les deux revendications précédentes, caractérisé en ce que la plaque (6) de pressage inférieure opposée est également munie d'une tuyauterie (7) reliée à la chambre inférieure (B) opposée à la chambre supérieure (A), la séparation par le mouvement élastique de ladite feuille élastique (G) et flexible, ladite tuyauterie (7) étant relié par un dispositif à vide ou au même dispositif à vide de la chambre opposée (A) afin de réaliser le vide dans l'une ou l'autre des deux chambres opposées.
7. Dispositif selon les trois revendications précédentes, caractérisé en ce que le système de commande est intégré à un ensemble électrovanne, destiné à dévier, ouvrir ou fermer le débit du fluide, dans ce cas spécifique, l'air comprimé, pour l'entrée ou le retrait des chambres opposées respectivement (A) et (B) dans laquelle les opérations sont programmées et réalisées à l'aide d'un ensemble de commandes pneumatiques électriques par un calculateur de cycles.
8. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le cadre (1) de la feuille (G) élastique et/ou flexible est fixée sur la plaque supérieure de la presse (2) et en ce que la plaque inférieure de la presse (6) est munie d'une entretoise (D) interchangeable destinée à supporter les pièces à presser et coller et en ce que le support (1) peut être relié par l'intermédiaire de moyens de raccordement pour modifier sa hauteur.
9. Presse ou installation équipée d'un dispositif selon l'une des précédentes revendications et destiné à la réalisation du procédé défini dans les revendications 1, 2, 3 à l'aide de plus d'un des équipements placés sur la plaque de pressage.
EP82830139A 1981-05-27 1982-05-24 Procédé et dispositif pour presser une feuille mince sur une plaque Expired EP0066556B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82830139T ATE18647T1 (de) 1981-05-27 1982-05-24 Verfahren und vorrichtung zum pressen einer duennen schicht an einer moebelplatte.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT83394/81A IT1146791B (it) 1981-05-27 1981-05-27 Procedimento e attrezzatura per l'incollaggio mediante pressa di sfogliati sottili su superfici curve e/o piane
IT8339481 1981-05-27

Publications (3)

Publication Number Publication Date
EP0066556A2 EP0066556A2 (fr) 1982-12-08
EP0066556A3 EP0066556A3 (en) 1983-08-17
EP0066556B1 true EP0066556B1 (fr) 1986-03-19

Family

ID=11321229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82830139A Expired EP0066556B1 (fr) 1981-05-27 1982-05-24 Procédé et dispositif pour presser une feuille mince sur une plaque

Country Status (6)

Country Link
EP (1) EP0066556B1 (fr)
AT (1) ATE18647T1 (fr)
BR (1) BR8204286A (fr)
DE (1) DE3269948D1 (fr)
ES (1) ES8306633A1 (fr)
IT (1) IT1146791B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2011200639B2 (en) * 2005-06-03 2012-02-02 3S Swiss Solar Systems Ag Machine for the production of sheet elements from composite material

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19812343C2 (de) * 1998-03-20 2003-11-20 Guenther Vetter Beschichtungspresse
DE102010049213B3 (de) * 2010-10-21 2011-12-29 Lsi Ludwig Schleicher Ingenium Gmbh & Co. Kg Verfahren und Vorrichtung zum Befestigen eines Bezugs an einem Fahrzeug-Bauteil
CN103042577A (zh) * 2013-01-04 2013-04-17 太仓锦阳宝船建造有限公司 一种游艇最外层木板的贴合工艺
CN104960309A (zh) * 2015-07-10 2015-10-07 苏州一瓦包装设备有限公司 瓦楞纸板生产线双面机快速压载贴合系统
FR3052379A1 (fr) * 2016-06-13 2017-12-15 Univ Bordeaux Procede d'assemblage de bois deroule en forme de tube et produits issus du dit procede
CN112428379B (zh) * 2020-11-13 2022-04-08 山东唐唐家居有限公司 一种多层模压门面板造型装置及其工艺
CN113276233B (zh) * 2021-05-14 2022-10-14 永城职业学院 一种高效的木制家具加工压胶装置
CN116160519A (zh) * 2023-01-04 2023-05-26 时欣家具南通股份有限公司 一种多层板压合设备

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH197927A (de) * 1937-06-16 1938-05-31 Hans Schmitter Verfahren und Einrichtung zum Absperren und Fournieren von geschweiften Möbelstücken.
GB494885A (en) * 1937-09-22 1938-11-03 Johann Palfi Improvements in or relating to pressing, bending or veneering wood
CH203501A (de) * 1938-03-12 1939-03-15 Horn Willy Furnierpresse.
CH239587A (de) * 1944-04-13 1945-10-31 Sueffert Buerner Fritz Presseinrichtung zum Absperren und Furnieren von Holzstücken.
CH289132A (de) * 1951-03-01 1953-02-28 Ag Ulrich Steinemann Furnierpresse.
DE1183353B (de) * 1960-10-14 1964-12-10 Us Rubber Co Vakuumtiefziehverfahren zum UEberziehen gepolsterter Werkstuecke mit einem UEberzugsstoff und Vorrichtung zu dessen Durchfuehrung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2011200639B2 (en) * 2005-06-03 2012-02-02 3S Swiss Solar Systems Ag Machine for the production of sheet elements from composite material

Also Published As

Publication number Publication date
ES513374A0 (es) 1983-06-01
IT1146791B (it) 1986-11-19
ATE18647T1 (de) 1986-04-15
ES8306633A1 (es) 1983-06-01
BR8204286A (pt) 1984-01-10
EP0066556A3 (en) 1983-08-17
IT8183394A0 (it) 1981-05-27
EP0066556A2 (fr) 1982-12-08
DE3269948D1 (en) 1986-04-24

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