EP0562280B1 - Corp d'obturation latérale pour une presse continue à doubles bandes - Google Patents

Corp d'obturation latérale pour une presse continue à doubles bandes Download PDF

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Publication number
EP0562280B1
EP0562280B1 EP93102611A EP93102611A EP0562280B1 EP 0562280 B1 EP0562280 B1 EP 0562280B1 EP 93102611 A EP93102611 A EP 93102611A EP 93102611 A EP93102611 A EP 93102611A EP 0562280 B1 EP0562280 B1 EP 0562280B1
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EP
European Patent Office
Prior art keywords
press
lateral limiting
limiting bodies
bodies
channels
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
EP93102611A
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German (de)
English (en)
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EP0562280A1 (fr
Inventor
Kurt Held
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
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Publication of EP0562280A1 publication Critical patent/EP0562280A1/fr
Application granted granted Critical
Publication of EP0562280B1 publication Critical patent/EP0562280B1/fr
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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
    • B27D3/00—Veneer presses; Press plates; Plywood presses
    • B27D3/04—Veneer presses; Press plates; Plywood presses with endless arrangement of moving press plates, belts, or the like
    • 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

Definitions

  • the invention relates to side delimitation bodies of a continuously operating press according to the preamble of patent claim 1.
  • the invention relates to side delimitation bodies for the lateral sealing of the press zone formed by the runs of a double belt press.
  • the pressed material For the production of decorative laminate, chipboard, fiberboard, plywood, electrical laminate, etc., the pressed material must be exposed to high pressure and high temperature so that the resin is fully cured and the products have the required quality.
  • two endless steel belts which transfer the pressure and the amount of heat required to harden the resin to the material to be pressed and simultaneously pull it through the press, are each guided over a drive and deflection drum so that a pressing space is located between the opposite belt runs , the so-called reaction zone, is formed.
  • the pressure is usually transmitted mechanically by rollers rolling on the press belts or hydraulically by means of spaces which are sealed to the outside and filled with fluid pressure media.
  • the reaction zone formed from the two opposing press belts or multi-layer belt packages is closed at the top and bottom by the press belt or the multi-layer belt package, towards the front in the direction of travel of the material to be pressed by hardened resin and towards the rear by unmelted resin.
  • it is open on the sides, which allows excess resin to escape here.
  • the laminate hardens in the edge area without pressure and the required thickness tolerance cannot be achieved here, so that this so-called press edge must be cut off after the laminate has been finished.
  • the reaction zone is also sealed on the side.
  • a press in which a lateral seal is formed such that the opposing surfaces of the press belts are provided at their edges opposite one another with grooves into which a wire is inserted, the diameter of which is approximately as large as the sum of twice the depth of the groove and the distance between the two press belts. Carrying the wire along the side edges of the press belts results in a reaction zone which is closed on all sides.
  • Resin which comes into the immediate vicinity of the side delimitation body, is cooled by the coolable side delimitation body, as a result of which it solidifies.
  • This solidified part of the resin acts as a seal against the resin lying further away from the side delimitation bodies.
  • the seal formed in this way also withstands higher pressures, since resin, which still flows through any remaining leaks due to the high pressure to the side delimitation body, is solidified by its low temperature and thus these leaks are also sealed.
  • the side delimitation body designed according to the invention provides a lateral sealing of the pressing zone formed by the runs, which is characterized by good tightness even at high pressures.
  • the side delimitation bodies according to the invention can advantageously also be used in a press arrangement in which the mutually opposite surfaces of the press belts are provided on their edges opposite one another with grooves in which a wire is inserted, the diameter of which is approximately as large as the sum of twice the depth of the groove and the distance between the two press belts.
  • Such an arrangement combines two seals of different principles in such a way that an excellent overall seal results.
  • the cooling of the side delimitation bodies is achieved in a very simple manner.
  • the design of the side delimitation body from layered sheets allows very simple production. By using silver or nickel solder to solder the channel walls, clean, resistant solder seams are achieved.
  • a series connection of the channels of several side boundary bodies allows the side boundary bodies to be supplied with coolant in a simple manner.
  • the channels of the side delimitation body can advantageously be connected in parallel.
  • the continuously operating press shown in Fig. 1 contains two multi-layer belt packs (2) and (17) which run over deflection rollers (1).
  • the multi-layer belt packs consist of individual press belts (2a, 2b, 2c) and (17a, 17b, 17c), the stretched length of which is determined in such a way that they can absorb the tensioning and circumferential forces necessary for the feed evenly.
  • the mechanical or hydraulic pressure is exerted by pressure plates (4) and (7) via rolling elements (5) or fluid pressure medium (6) on belt runs (3) of the multi-layer belt packs (2) and (17).
  • the press frame which absorbs the reaction forces emanating from the pressure-generating hydraulic cylinders (8) or from the fluid pressure medium (6) in the cavities (9), is omitted.
  • the multilayer tape packs (2) and (17) are, as known, by clamping means (15), for. B. hydraulic cylinder, tensioned and driven by the guide drums (1).
  • Fig. 2 shows a greatly enlarged reaction zone formed by the strands (3) consisting of the multi-layer belt packs (2, 17).
  • This reaction zone is sealed off to the side by side delimitation bodies (12), which are partly located between the bands (2) and (17).
  • An existing gap (13) between the side delimitation bodies (12) and the press belts (2) and (17) is very small, so that very little resin can escape from the press zone even with uncooled side delimitation bodies.
  • the side delimitation bodies (12) have a channel (19) at their end directed towards the material to be pressed (14). A coolant flows through this channel (19), so that resin located in the immediate vicinity (16) of a side delimitation body (12) solidifies. This solidification acts as a seal against inflowing, thin resin.
  • the gap (13) between the side boundary body (12) and the press belts (2) and (17) is also cooled by the coolant in the channel (19), so that resin, which should get into this gap (13), also solidified and thus additionally seals the pressing zone.
  • Fig. 3 shows a further embodiment of the present invention in a double belt press, in which the opposite surfaces of the press belts (2) and (17) are provided at their edges opposite one another with grooves (13a) into which a wire (18) is inserted is.
  • the reaction zone shown in greatly enlarged form, which is formed by the strands (3) consisting of the multilayer belt packs (2) and (17), is sealed off to the side by the wire (18) carried along.
  • the wire (18) which is pulled through the press at the same speed as the material to be pressed (14), is inserted into two grooves (13a), the press belt (2a) of the upper multilayer facing the material to be pressed (14) -Band package and (17a) of the lower multilayer tape package are incorporated.
  • a small cavity (16a) remains between the wire (18) and the material to be pressed (14a), into which excess resin that emerges from the material to be pressed (14) passes.
  • the wire (18) is supported laterally by the side delimitation bodies (12), which thus act as a sealing wire support bracket. Since the side boundary bodies (12) are kept at a temperature which is below the melting point of the resin by the coolant flowing through the channels (19), there is a temperature gradient between the wire (18) and the side boundary bodies (12). Heat is thus extracted from the wire (18) by heat conduction and convection through the side delimitation body (12). This heat removal leads to the resin in the area (16a) and possibly in the area (13a) solidifying. This solidification of the resin considerably improves the seal already achieved by the wire (18), so that the combination of this wire seal, which is known per se, with a side delimitation body (12) according to the invention ensures very good lateral sealing of the pressing zone.
  • the side delimitation bodies (12) are not placed outside the press belts as shown in FIG. 3, but in such a way that they similar to that shown in Fig. 2, between the press belts (2) and (17), a further improvement in the lateral sealing of the press zone is achieved.
  • Fig. 4 shows a side boundary body (12) according to the invention in plan view and Fig. 5 shows a section of this side boundary body (12) along the line A-B.
  • the side boundary body (12) has an upper cover (20), a lower cover (21) and an intermediate middle layer (22).
  • the middle layer (22) is shaped such that it is broken through in accordance with the contour of the channel (19). If the layers are placed on top of one another, a body is obtained in which the channel (19) is formed.
  • the middle layer (22) is soldered to the upper (20) and lower (21) layers along the edges of the channel (19). Silver or nickel solder is expediently used as the solder. However, the middle layer (22) can also be soldered to the upper (20) and lower (21) layers over its entire surface. It is only important that the channel (19) is formed after the three layers have been joined together.
  • Connection blocks (23) are provided for supplying the channel (19) with a coolant.
  • the connection blocks (23) are designed in such a way that they connect the channel (19) to the surroundings via bores in the upper cover (20).
  • the upper cover (20), the lower cover (21) and the middle layer (22) have bores (24) which serve to center the three layers.
  • the side delimitation bodies (12) have recesses (25a) and (25b) which are adapted to the press construction. The adjustment takes place in such a way that the side delimitation body (12) firmly wraps around parts of the press and is thus fastened to it. Through this attachment shear forces, which arise in the press frame due to friction of the wire moving with the press belts or the press belts themselves or the solidified resin with the side delimitation bodies (12), are passed into the press frame.

Claims (8)

  1. Pièce d'obturation latérale pour une presse continue à double bande, comportant une bande de presse (2, 17), supérieure (2) et inférieure (17), passant respectivement sur une paire de tambours de renvoi (1) et, entre les brins de cette presse, en regard, on comprime une nappe de matière (14), par exemple des produits laminés, électrolaminés, des minces plaques d'aggloméré ou de fibres, du contreplaqué ou analogue, sous l'action de la pression, la pression étant transmise mécaniquement par des rouleaux sur lesquels roulent les bandes de presse, ou de manière hydraulique par des chambres remplies de fluide sous pression et fermées vis-à-vis de l'extérieur, pour agir sur les bandes de presse, les pièces d'obturation latérale étant placées entre les brins en regard des bandes de presse (2, 17) pour assurer l'étanchéité latérale de la zone de compression formée par les brins, caractérisée en ce que les pièces d'obturation latérale (12) sont réalisées de manière à pouvoir être refroidies.
  2. Presse selon la revendication 1, caractérisée en ce que les pièces d'obturation latérale (12) sont montées fixes.
  3. Presse selon la revendication 1 ou 2, caractérisée en ce que les surfaces en regard des bandes de presse (2a, 17a) comportent dans leur bord des rainures (13a) en regard recevant un câble (18) qui s'appuie latéralement sur les pièces d'obturation latérale (12).
  4. Presse selon l'une des revendications 1 à 3, caractérisée en ce que les pièces d'obturation latérale (12) comportent des canaux (19) parcourus par un fluide de refroidissement.
  5. Presse selon la revendication 4, caractérisée en ce que les pièces d'obturation latérale (12) sont réalisées en tôles revêtues (20, 21, 22) pour former les canaux (19).
  6. Presse selon la revendication 4 ou 5, caractérisée en ce que les parois des canaux (19) sont soudées par de la soudure à l'argent ou au nickel.
  7. Presse selon l'une des revendications 4 à 6, caractérisé en ce que de chaque côté de la zone de compression il y a plusieurs organes d'obturation latérale (12) dont les canaux (19) sont branchés en série pour assurer l'alimentation en fluide de refroidissement.
  8. Presse selon l'une des revendications 4 à 6, caractérisée en ce que de chaque côté de la zone de compression il y a plusieurs organes d'obturation latérale (12) dont les canaux (19) sont branchés en parallèle pour assurer l'alimentation en fluide de refroidissement.
EP93102611A 1992-06-12 1993-02-19 Corp d'obturation latérale pour une presse continue à doubles bandes Expired - Lifetime EP0562280B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4219226 1992-06-12
DE4219226A DE4219226C2 (de) 1992-06-12 1992-06-12 Kontinuierlich arbeitende Doppelbandpresse mit Seitenabgrenzungskörpern

Publications (2)

Publication Number Publication Date
EP0562280A1 EP0562280A1 (fr) 1993-09-29
EP0562280B1 true EP0562280B1 (fr) 1995-11-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP93102611A Expired - Lifetime EP0562280B1 (fr) 1992-06-12 1993-02-19 Corp d'obturation latérale pour une presse continue à doubles bandes

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EP (1) EP0562280B1 (fr)
AT (1) ATE130797T1 (fr)
DE (3) DE4219226C2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT403355B (de) 1994-11-07 1998-01-26 Danubia Petrochem Polymere Vorrichtung zur herstellung von faserverstärktem, thermoplastischen material
DE4442320A1 (de) * 1994-11-29 1996-05-30 Danubia Petrochem Deutschland Verfahren zur Herstellung von faserverstärktem, thermoplastischen Material und Vorrichtung zur Durchführung des Verfahrens
DE29622385U1 (de) * 1996-12-24 1997-04-30 Berndorf Band Ges M B H Doppelbandpresse, sowie endloses Band für eine Doppelbandpresse
PL3392029T3 (pl) 2017-04-21 2022-04-25 Held Technologie Gmbh Podajnik do dwutaśmowej prasy, układ dwutaśmowej prasy i sposób użytkowania
DE102018118212B3 (de) * 2018-07-27 2020-01-30 Held Technologie Gmbh Gleitflächendichtung für eine kontinuierlich arbeitende Doppelbandpresse und Doppelbandpresse
DE102019120273B4 (de) 2019-07-26 2023-04-27 Held Technologie Gmbh Verfahren zur Herstellung eines verbindungsnahtfreien, umfangsgeschlossenen Ringbandes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2923036A1 (de) * 1979-06-07 1980-12-11 Sandvik Conveyor Gmbh Doppelbandpresse mit zwei umlaufenden endlosen stahlbaendern o.dgl.
US4456498A (en) * 1982-08-10 1984-06-26 Macmillan Bloedel Limited Microwave applicator for continuous press
DE3347877C2 (de) * 1983-04-28 1985-11-14 Held, Kurt, 7218 Trossingen Seitenabdichtung des Preßraumes einer Doppelbandpresse
DE4002214A1 (de) * 1990-01-26 1991-08-01 Wilfried Ensinger Verfahren und vorrichtung zur endlosen herstellung von platten aus einer warmen, plastischen kunststoff-formmasse

Also Published As

Publication number Publication date
ATE130797T1 (de) 1995-12-15
DE4219226C2 (de) 1994-10-27
DE59301031D1 (de) 1996-01-11
EP0562280A1 (fr) 1993-09-29
DE4219226A1 (de) 1993-06-03
DE9302412U1 (fr) 1993-05-13

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