EP0195128B1 - Installation pour la fabrication continue de panneaux de particules sans fin et minces - Google Patents

Installation pour la fabrication continue de panneaux de particules sans fin et minces Download PDF

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Publication number
EP0195128B1
EP0195128B1 EP85116145A EP85116145A EP0195128B1 EP 0195128 B1 EP0195128 B1 EP 0195128B1 EP 85116145 A EP85116145 A EP 85116145A EP 85116145 A EP85116145 A EP 85116145A EP 0195128 B1 EP0195128 B1 EP 0195128B1
Authority
EP
European Patent Office
Prior art keywords
means according
deflecting
pressure roller
roller
band
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
EP85116145A
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German (de)
English (en)
Other versions
EP0195128A1 (fr
Inventor
Manfred Schenz
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.)
Wilhelm Mende & Co GmbH
Original Assignee
Wilhelm Mende & Co GmbH
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 Wilhelm Mende & Co GmbH filed Critical Wilhelm Mende & Co GmbH
Priority to AT85116145T priority Critical patent/ATE53182T1/de
Publication of EP0195128A1 publication Critical patent/EP0195128A1/fr
Application granted granted Critical
Publication of EP0195128B1 publication Critical patent/EP0195128B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B27N3/26—Moulding or pressing characterised by using continuously acting presses having a heated press drum and an endless belt to compress the material between belt and drum
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1741—Progressive continuous bonding press [e.g., roll couples]

Definitions

  • the invention relates to a device of the type mentioned in the preamble of claim 1 for the continuous production of an endless, thin chipboard web.
  • the belt running underneath the spreading machine like the belt wrapping around the press roll, is a steel belt, but which is an endless steel belt separated from the steel belt wrapping around the press roll, that does not have to be subjected to as high tensile loads as the steel belt that wraps around the press roll and can therefore consist of steel of lower quality and is therefore cheaper.
  • the invention has for its object to avoid the disadvantages in particular of the last-mentioned known device and to create a device of the type in question, which has an even lower price, the operation of which is cheaper in terms of heat expenditure and which achieves all of this without the The quality of the finished chipboard is impaired.
  • the basic idea of the invention is, like the last-mentioned known device, to use two different belts in order to be able to adapt them to the different tasks in the area of the press roll and in the area of the spreading machine, but for the belt in the area of the material spreading machine Steel go off and instead use a flexible textile belt, which can consist of natural and / or plastic fibers and has the ability to take very small radii of curvature, so that it can run around a deflection edge that is very close to the steel belt in front of it Casserole can be arranged on the press roller so that there can be a transfer of the chip cake lying on the flexible textile belt to the steel belt.
  • the chip cake therefore only needs to cover an extremely short distance without a moving surface, so that it is fundamentally possible for the pre-pressed chip cake to travel this distance without support, so that no friction can occur and the risk of deferrals and deterioration in the quality of the finished chipboard is avoided .
  • the use of a flexible textile tape also has the advantage that a high-frequency heating device for preheating the chip cake can be used with improved effect, since the textile tape can be produced from a material which has extremely low dielectric losses. This also leads to a very even heating of the chip cake. Since the textile strip is practically not heated in the heating device for preheating the chips, and since the specific heat of the material of the textile strip is also low, the heat losses are further reduced. Overall, thermal energy savings of up to 50% result when the teaching according to the invention is used.
  • the deflecting edge is expediently formed by a wedge-shaped edge of a support table for the flexible band. This can be arched in order to improve the transfer, in particular also to be able to adapt to the curvature of the counter-pressure roller.
  • the deflection edge can have a very small radius of curvature. Despite this small radius of curvature, it is also possible to form the edge by means of a roller with a very small radius or corresponding small rollers, so that there is no friction and therefore no impairment of the flexible textile belt.
  • the flexible band is expediently inclined downward in the running direction in front of the deflection edge. This facilitates the transfer from the flexible belt to the steel belt by using gravity to facilitate the transfer.
  • the transfer from the flexible belt to the steel belt is further facilitated by a further development of the invention, in which a pre-press is arranged between the spreader and the press roller: the chip cake already has sufficient strength in the transfer area so that there is no structural damage.
  • a heating device in particular a high-frequency heating device, between the spreading machine and the pre-press also has a favorable effect. This favors the pre-pressing and the behavior and structure of the chip cake is so favored that even under difficult conditions no structural damage to the pre-pressed chip cake can occur in the transfer area.
  • the heating device for preheating the chip cake is expediently dimensioned such that the chips are heated to a temperature of about 50-60 ° C. As a result, as much heat as possible is supplied without the binder with which the chips are already being cured hardening.
  • the pre-press is dimensioned such that the chip cake entering the pre-press is compressed by no more than 50%, preferably by 10%.
  • This very low pre-compression is just enough to ensure the transfer of the pre-pressed chip cake from the textile belt to the steel belt without impairing the structure, but at the same time the formation of bonds between the chips before entry into the actual press nip between the press roll and the counter-pressure roll, with respect to which the There is a risk of permanent reopening when entering the press nip.
  • the support rail for the chip cake provided between the deflection roller or deflection rollers and the steel belt is expediently cooled and is provided with a cooling channel for this purpose.
  • means are provided for guiding a paper web onto the steel strip before it runs onto the press roll.
  • the paper web thus runs directly in front of the press nip, which is possible by dividing it into steel strips and textile strips.
  • the paper web therefore does not have to be fed in front of the spreader, which would mean a large length of the paper web in front of the press nip, via which strains can occur in the paper band, which lead to changes in the structure of the poured chip cake and thus to impaired quality of the finished chipboard.
  • chips mixed with a binder are scattered onto a textile belt 2, which is spread by the scattering machine 1 through a high-frequency heating device 3, through a pre-press 4, over a curved table 5, over its front deflecting edge 6 and is returned to the spreader via deflection rollers 7 to 11.
  • the press device for the final pressing has a press roller 12 which is partially wrapped in a steel belt 13, which is guided around a deflection roller 14, a tension roller 15, a pressure roller 16 and a counter-pressure roller 17, which presses the steel belt 13 against the pressure roller 12 and thus forms a press nip between the two.
  • the press pressure is maintained in the area after this press nip by the tension of the steel strip 13, this pressure being sufficient for the remaining setting of the binder until it leaves the press roll 12.
  • the deflecting edge 6 of the table 5 is located fairly close to the press nip between the counter-pressure roller 17 and the press roller 12 and just above the counter-pressure roller 17, so that the pre-pressed chip cake lying on the textile belt 2 runs onto the top of the steel belt 13 practically without changing the direction and further enters the press nip.
  • chips mixed with binding agent are continuously sprinkled onto the continuously circulating textile belt 2 by the spreading machine 1.
  • This chip cake formed in this way is heated in the high-frequency heating device 3 to a temperature which is harmless to the textile strip 2 and, moreover, is below the setting temperature of the binding agent. This preheating increases the compressibility of the chip cake in the subsequent pre-press 4.
  • the chip cake After leaving the pre-press 4, the chip cake has a significantly reduced thickness and already has such a strength that transfer of the pre-pressed chip cake from the textile belt 2 to the steel belt 13 in the region of the deflection edge 6 is possible without structural damage. It is of course assumed that the textile belt 2 and the steel belt 13 have essentially the same rotational speed.
  • FIG. 2 shows the right part of FIG. 1, but a spool 18 is provided, from which a paper web 19 runs over a deflection roller 20 onto the steel belt 13 close to the press nip between the press roller 12 and the counter-pressure roller 17. From the point of impact of the paper web 19 on the steel belt 13 to the press nip, the paper web 19 already lies firmly on the steel belt 13 wrapping around the counter-pressure roller 17, so that no relative movements between the two are possible. In addition, the chip cake is already pressed together in this area, so that the paper web can no longer carry out changes in length which would lead to impairment of the chip cake. The paper web 19 is therefore laminated onto the particle board web in the press nip without impairing quality.
  • a spool 21 can also be provided on the upper side, from which a second paper web 22 runs over a deflecting roller 23 onto the press roller 12 immediately before the press nip.
  • Fig. 3 shows a greatly enlarged section of Fig. 1 in the area of the press nip between the press roller 12 and the counter-pressure roller 17.
  • 5 small deflection rollers 24 are provided at the end of the table around which the textile belt 2 runs. These rollers have a diameter of approximately 6 mm and their axis is held on the front edge of the table 5 by comb-like projections which reach between the rollers.
  • a flat support rail 26 with a triangular cross section through which a cooling channel 27 extends.
  • the support surface of this support rail 26 extends approximately along the tangent to the deflection rollers 24 and the counter-pressure roller 17th

Claims (18)

1. Installation pour la fabrication en continu d'un panneau de particules sans fin et mince, dans laquelle une machine de diepersion de copeaux de bois mélangés à un liant est disposée au-dessus d'une partie se déplaçant horizontalement d'une bande circulant en continu et tendue, avec un rouleau compresseur chauffé contre lequel monte par sa face supérieure une bande sans fin en acier et qui est partiellement bouclé par la bande en acier, de telle manière que soit formée entre la bande en acier et le rouleau compresseur une fente de compression, avec un rouleau de contre-pression qui comprime la bande contre le rouleau compresseur dans la zone de montée de la bande en acier sur le rouleau compresseur, le diamètre du rouleau compresseur étant choisi suffisamment grand pour que la liaison entre les copeaux ne soit pas entamée lors de la courbure à plat du panneau de particules comprimé terminé, caractérisée en ce que la bande sans fin se déplaçant au-dessous de la machine de dispersion est une bande textile (2) flexible qui est guidée depuis la machine de dispersion (1) jusqu'à une arête de changement de direction (6) étroitement au-dessus de la bande en acier (13) avant son passage sur le rouleau compresseur (12), et de là en retour à la machine de dispersion (1).
2. Installation selon la revendication 1, caractérisée en ce que l'arête de changement de direction (6) es formée par une arête, comformée en coin, d'une table porte-pièce (5) pour la bande flexible (2).
3. Installation selon la revendication 1, caractérisée en ce que la table porte-pièce (5) est courbée en forme d'arc.
4. Installation selon la revendication 1, caractérisée en ce que l'arête de changement de direction (6) a un petit rayon d'arrondi.
5. Installation selon la revendication 1, caractérisée en ce que l'arête de changement de direction (6) est formée par un petit tambour de changement de direction ou de nombreux petits rouleaux de changement de direction (24) disposés les uns à côté des autres.
6. Installation selon la revendication 1, caractérisée en ce que la bande flexible (2) est courbée vers le bas avant l'arête de changement de direction (6) dans la direction de déplacement.
7. Installation selon la revendication 1, caractérisée en ce que la bande flexible (2) se déplace, avant l'arête de changememt de direction (6) dans la direction de déplacement, sensiblement tangentiellement au rouleau de contre-pression (17) avant la fente de compression entre le rouleau compresseur (12) et le rouleau de contre-pression (17).
8. Installation selon la revendication 1, caractérisée en ce qu'une presse préliminaire (4) travaillant en continu est disposée entre la machine de dispersion (1) et l'arête de changement de direction (6).
9. Installation selon la revendication 1, caractérisée en ce qu'un dispositif de chauffage pour les copeaux, en particulier un dispositif de chauffage haute-fréquence (3), es disposé entre la machine de dispersion (1) et la presse préliminaire (4).
10. Installation selon la revendication 9, caractérisée en ce que le dispositif de chauffage (3) est dimensionné de telle manière que les copeaux sont chauffés à une température d'environ 50-60°C.
11. Installation selon la revendication 8, caractérisée en ce que la presse préliminaire (4) est dimensionnée de telle manière que le gâteau de copeaux soit comprimé à pas plus de 50%, avantageusement à 10%.
12. Installation selon la revendication 5, caractérisée en ce que le diamètre du tambour de changement de direotion ou des rouleaux de changement de direction (24) est d'environ 20 mm ou moins, avantageusement de 6-10mm.
13. Installation selon la revendication 5, caractérisée en ce qu'une barre d'appui (26) est disposée entre le tambour de changement de direction ou les rouleaux de changement de direction (24) et la bande en acier (13), dont la surface d'appui supérieure s'étend essentiellement le long de la tangente commune supérieure au tambour de changement de direction ou aux rouleaux de changement de direction (24) et au rouleau de contre-pression (17).
14. Installation selon la revendication 13, caractérisée en ce que la barre d'appui (26) a une section transversale triangulaire.
15. Installation selon la revendication 13, caractérisée en ce que la barre d'appui (26) présente au moins un canal de refroidissement (27) par lequel s'écoule un milieu de refroidissement, en particulier de l'eau.
16. Installation selon la revendication 1, caractérisée en ce que sont prévus des moyens (18, 20) pour le guidage vers le haut d'une bande de papier (19) sur la bande en acier (13) avant son passage sur le rouleau compresseur (17).
17. Installation selon la revendication 16, caractérisée en ce que sont prévus des moyens (21, 23) pour la montée d'une bande de papier (22) sur le rouleau compresseur (12) avant le passage de la bande en acier (13) sur le rouleau compresseur (12).
18. Installation selon la revendication 1, caractérisée en ce que la bande flexible (2) s'étend sensiblement tangentiellement au rouleau de contre-pression (17) dans la zone se trouvant derrière l'arête de changement de direction (6) dans la direction de déplacement.
EP85116145A 1985-03-22 1985-12-18 Installation pour la fabrication continue de panneaux de particules sans fin et minces Expired - Lifetime EP0195128B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85116145T ATE53182T1 (de) 1985-03-22 1985-12-18 Einrichtung zur kontinuierlichen herstellung einer endlosen, duennen spanplattenbahn.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3510460 1985-03-22
DE3510460 1985-03-22
DE3541286 1985-11-22
DE19853541286 DE3541286A1 (de) 1985-03-22 1985-11-22 Einrichtung zur kontinuierlichen herstellung einer endlosen, duennen spanplattenbahn

Publications (2)

Publication Number Publication Date
EP0195128A1 EP0195128A1 (fr) 1986-09-24
EP0195128B1 true EP0195128B1 (fr) 1990-05-30

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ID=25830632

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85116145A Expired - Lifetime EP0195128B1 (fr) 1985-03-22 1985-12-18 Installation pour la fabrication continue de panneaux de particules sans fin et minces

Country Status (11)

Country Link
US (1) US4744854A (fr)
EP (1) EP0195128B1 (fr)
JP (1) JPH0671723B2 (fr)
CN (1) CN1012048B (fr)
CA (1) CA1266607A (fr)
DE (1) DE3541286A1 (fr)
DK (1) DK162333C (fr)
ES (1) ES8704788A1 (fr)
FI (1) FI82409C (fr)
MX (1) MX165176B (fr)
SU (1) SU1505434A3 (fr)

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PT3215327T (pt) 2014-11-06 2020-09-10 Flooring Technologies Ltd Painel de derivados de madeira, em particular na forma de um material compósito de madeira e material sintético e um processo para a sua produção
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CN106003361A (zh) * 2016-07-14 2016-10-12 重庆市创农木制品包装箱有限公司 一种人造板均匀板坯成型系统
CN105946088A (zh) * 2016-07-14 2016-09-21 重庆市创农木制品包装箱有限公司 一种人造板美观板坯成型系统
CN106003360A (zh) * 2016-07-14 2016-10-12 重庆市创农木制品包装箱有限公司 一种人造板板坯成型系统

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Also Published As

Publication number Publication date
CN1012048B (zh) 1991-03-20
MX165176B (es) 1992-10-30
CN86101826A (zh) 1986-10-08
US4744854A (en) 1988-05-17
DK36086A (da) 1986-09-23
FI860021A0 (fi) 1986-01-03
DK36086D0 (da) 1986-01-24
DE3541286C2 (fr) 1993-07-08
FI82409C (fi) 1991-03-11
EP0195128A1 (fr) 1986-09-24
ES8704788A1 (es) 1987-05-01
SU1505434A3 (ru) 1989-08-30
CA1266607A (fr) 1990-03-13
JPH0671723B2 (ja) 1994-09-14
DE3541286A1 (de) 1986-09-25
FI82409B (fi) 1990-11-30
ES550840A0 (es) 1987-05-01
FI860021A (fi) 1986-09-23
DK162333C (da) 1992-03-09
DK162333B (da) 1991-10-14
JPS61220803A (ja) 1986-10-01

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