EP0401551B1 - Procédé et produit de revêtement de panneaux de coffrage - Google Patents

Procédé et produit de revêtement de panneaux de coffrage Download PDF

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Publication number
EP0401551B1
EP0401551B1 EP90109050A EP90109050A EP0401551B1 EP 0401551 B1 EP0401551 B1 EP 0401551B1 EP 90109050 A EP90109050 A EP 90109050A EP 90109050 A EP90109050 A EP 90109050A EP 0401551 B1 EP0401551 B1 EP 0401551B1
Authority
EP
European Patent Office
Prior art keywords
panels
surface layer
coating material
parts
approximately
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
EP90109050A
Other languages
German (de)
English (en)
Other versions
EP0401551A1 (fr
Inventor
Heinz Hoffmann
Alfred Fritzen
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.)
hewa bauschalungs GmbH
Original Assignee
hewa bauschalungs 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 hewa bauschalungs GmbH filed Critical hewa bauschalungs GmbH
Priority to AT90109050T priority Critical patent/ATE92569T1/de
Publication of EP0401551A1 publication Critical patent/EP0401551A1/fr
Application granted granted Critical
Publication of EP0401551B1 publication Critical patent/EP0401551B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/02—Forming boards or similar elements
    • E04G9/05—Forming boards or similar elements the form surface being of plastics
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/02—Forming boards or similar elements
    • E04G2009/023—Forming boards or similar elements with edge protection
    • E04G2009/025—Forming boards or similar elements with edge protection by a flange of the board's frame

Definitions

  • the invention relates to a method for coating formwork panels, in particular made of plywood, for concrete formwork and the materials used.
  • Formwork panels of this type are very often installed in a metal frame and together form what are known as formwork elements, which are provided with suitable connecting elements and with the aid of which form large formwork surfaces, as are required in concrete building and civil engineering.
  • the known plywood formwork panels which have a thickness between 12 and 30 mm and consist of a large number of layers of different fiber directions glued together, have a brown, smooth and often glossy surface in order to detach themselves as easily as possible from the hardened concrete. Nevertheless, concrete sticks after repeated use of the formwork panel increasingly stuck to it and cleaning the panels becomes labor-intensive. After a maximum of thirty to forty uses, these formwork panels have to be taken out of operation and often enough, refurbishing and new coating is no longer possible.
  • a metal-framed formwork panel which consists of a wire mesh which is embedded in a tough-elastic covering layer which contains, among other things, used tire rubber granulate.
  • the surface protection covering of this plate consists of a mixture of hollow glass beads and polyurethanes, which protective covering can be rolled, painted or sprayed onto the covering layer.
  • due to the tendency of the mixture to disintegrate there are considerable difficulties in practical operation.
  • the invention has for its object to increase the stability of formwork panels and to facilitate their cleaning, if necessary at all.
  • this object is achieved by a coating method which has the characterizing features of claim 1.
  • Formwork panels coated in this way although their surface is not smooth, but feels rough due to the granulate inclusions, have a significantly higher stability of eighty or more uses.
  • the surface layer adheres better to the wood, detaches better from the concrete and is much easier to clean with scraping tools.
  • Another advantage is that the surface layer is relatively tough and, in contrast to the known formwork panels, does not peel off when a nail is hammered in at the point of impact.
  • the water permeability is also significantly lower than that of known formwork panels, so that the coated panels have less tendency to swell.
  • the base layer is advantageously applied in such a way that the liquid coating material is run through a horizontal slot and thereby forms a liquid curtain through which the plates are passed in the horizontal direction.
  • the plates should be turned after the base layer has hardened and then coated on the back in the same way. In the case of the materials to be explained below, curing can be accelerated by further transporting the plates in a cabinet in which a particularly high level of air humidity is maintained.
  • the plates are preferably passed under a multiple spray head which is reciprocating in the transverse direction and on which a first spray nozzle, a blow pipe for the granulate and a second spray nozzle are arranged one after the other in the running direction of the plates.
  • a multiple spray head which is reciprocating in the transverse direction and on which a first spray nozzle, a blow pipe for the granulate and a second spray nozzle are arranged one after the other in the running direction of the plates.
  • the panels with a metal frame are to be used as so-called complete formwork elements, it is proposed that the panels be cut to size after the two-sided application of the base layer, sealed at the cut edges, in particular with the coating material of the base layer, in an associated frame with an elevated the surrounding edge and fastened to it by screws, rivets or the like used the top layer is applied.
  • a mixture for the base layer and a mixture for the cover layer.
  • These mixtures are preferably stirred together from the ingredients specified in claims 6 and 7, the quantitative ratio should at least approximately correspond to the information given there.
  • the mixtures then have a consistency which makes it possible to produce a free-falling, coherent liquid curtain for applying the base layer or to spray the likewise liquid coating material for the cover layer with nozzles under pressure.
  • a granulate is introduced into the cover layer, preferably a very fine-grained powder made of hollow aluminum silicate balls, which have an average grain size of 0.01 to 0.35 mm. This powder can be conveyed pneumatically and blown out through a suitable pipe or nozzle and thereby finely distributed.
  • FIG. 1 shows the schematic cross section above of a storage channel 1, the length of which is at least equal to the width of the formwork panels 2 to be coated.
  • the horizontally mounted channel has at the bottom a straight, narrow longitudinal slot through which the stored liquid mixture runs out as a complete liquid curtain 3.
  • a collecting channel 4 is provided at the bottom, which then receives the liquid curtain as indicated by dash-dotted lines and discharges it into a collecting container 5.
  • the formwork panels 2 are carried out one after the other on a roller conveyor with driven rollers 6 in the direction of the arrow 7, ie perpendicular to the liquid curtain 3 at a uniform speed under the storage channel 1.
  • the liquid curtain is thus deposited on the formwork panels 2 and these then pass into an encapsulated transport system in which there is a high level of humidity in order to accelerate the curing process.
  • the base layer has hardened to such an extent that the panels can be turned over and driven through the system with the underside upwards.
  • the formwork panels thus coated on both sides are now cut to size so that they fit into the usual steel frames 8 of formwork elements.
  • An example is shown in FIG. 2.
  • the frame 8 consists of a rectangular hollow profile tube which has a raised edge 9 on one side, which surrounds the formwork element all around and covers the cut edges of the formwork panel 2. Nevertheless, in order to prevent the ingress of moisture, the cut edges are sealed, for example by applying the coating material according to Table A, before the panels are inserted into the frame. Usually the edge 9 protrudes a little beyond the plate thickness.
  • the formwork panels 2 are fastened to the frame by means of countersunk screws or preferably by shooting in bolts 10.
  • FIG. 3 shows the further treatment of the assembled components. These are moved horizontally in steps in the direction of arrow 13 with a step length of 20 cm, directly abutting one another by means of a suitable conveyor device, in the example a belt conveyor 12.
  • Fig. 3 shows the frame 8 seen from the side.
  • the plates 2 are on top.
  • a carriage 14 moves back and forth over the components. He has roles 15 that in corresponding guide rails 16 run and these are fastened over the belt conveyor.
  • the carriage carries three downwardly directed nozzles 17, 18 and 19, which are supplied via two hose lines 20 and 21.
  • the nozzles are arranged in the direction of movement 13 of the formwork elements at a mutual distance of 20 cm.
  • the front and rear nozzles 17 and 19 are connected to the hose line 20 and the hose line 21 supplies the nozzle 18.
  • the nozzles 17 and 19 spray a coating material according to Table B, while from the nozzle 18 a fine dust made of hollow aluminum silicate balls average grain size of 0.01 to 0.35 mm is blown out.
  • a powder which is marketed under the label STIFF 100/0 by the company Schwarzisselder Textil-Werke Heinrich Kautzmann GmbH, 7623 Schenkenzell, has proven to be particularly suitable.
  • the movement of the carriage 14 is coordinated with the forward movement of the formwork elements so that the latter always take a step when the carriage 14 reverses its direction of movement in the side areas, preferably outside the formwork panels 2. If one considers a transverse strip area of the plates, this is first sprayed with the coating liquid by the nozzle 19, then the powder is blown onto the still liquid lower cover layer via the nozzle 18 and finally the aluminum silicate particles adhering to the lower cover layer are removed from the nozzle 17 sprayed, so that they are finally firmly embedded in the top layer. After the surface layer has hardened in the air, the formwork elements are ready and can be used.
  • the arrangement of the different layers is illustrated in the right part of FIG. 2 in an exaggerated thickness.
  • the base layers on both sides are marked with A and the cover layer only on the upper, used side is marked with B.
  • Recipes for these layers are listed in the corresponding tables A and B.
  • the top layer B has a rough surface due to the aluminum silicate inclusions, which smoothes out when rubbed with a hard object. This could be due to the fact that the hollow spheres collapse, but this does not impair the extraordinary wear resistance of the layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)

Claims (7)

  1. Procédé pour déposer plusieurs couches sur des plaques de coffrage, en particulier en contreplaqué, pour des coffrages pour béton,
    caractérisé en ce qu'une couche de base (A) constituée d'une matière de revêtement liquide est déposée sur les plaques (2) non ouvrées ou libérées pour l'essentiel d'un revêtement précédent, de manière que l'on laisse couler la matière de revêtement liquide à travers une fente horizontale et que l'on forme ainsi un rideau liquide (3), à travers lequel les plaques (2) sont guidées en direction horizontale, en ce que la couche de base (A) est ensuite durcie, et en ce qu'une couche de recouvrement (B) est alors déposée, de manière que, sur une couche de recouvrement inférieure, déposée par pulvérisation et encore liquide, un granulat dur et à grains fins est soufflé et directement après une couche de recouvrement supérieure, d'une même matière de revêtement que la couche de recouvrement inférieure, est déposée par pulvérisation, après quoi la couche de recouvrement (B) constituée des couches partielles s'écoulant les unes dans les autres et des inclusions de granulat durcit en totalité.
  2. Procédé selon la revendication 1,
    caractérisé en ce que, pour le dépôt de la couche de recouvrement, les plaques se déplacent sous une tête de pulvérisation multiple (14) qui se déplace en va-et-vient dans la direction transversale, sur laquelle sont agencés en direction d'avance (13) des plaques, les uns derrière les autres, avec un écartement identique, une première buse (17), un tuyau de soufflage pour le granulat (18), et une seconde buse (19).
  3. Procédé selon la revendication 2,
    caractérisé en ce que les plaques (2) sont transportées par pas correspondant à l'écartement entre les buses (17,19) et le tuyau de soufflage (18), et en ce qu'un pas est effectué, à chaque fois, lorsque la tête de pulvérisation multiple (14) tourne dans la zone des bords latéraux des plaques.
  4. Procédé selon la revendication 1,
    caractérisé en ce qu'à la suite du dépôt de la couche de base (A) sur les deux faces, les plaques (2) sont coupées à la bonne taille, scellées aux bords de coupe, en particulier avec la matière de revêtement de la couche de base, disposées dans un cadre métallique associé (8), comportant un bord (9) continu surélevé, et fixées à ce bord par des vis, des rivets ou analogues (10) présentant une tête conique, en ce que les joints (11) entre les plaques (2) et les bords continus (9), ainsi que les cavités créées par les têtes coniques, sont remplies au moyen d'un mastic auto-durcissant, et en ce que, sur les parties de coffrage ainsi créés, la couche de recouvrement (B) est déposée sur le côté, avec lequel ils viennent au contact du béton.
  5. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que la matière de revêtement de la couche de base est constituée d'un composé comportant environ vingt parties d'un prépolymère de polyisocyanate, de préférence en plusieurs variétés, en tant que résine synthétique, environ trois parties d'amine tertiaire liquide, en tant que durcissant, environ trente parties de xylène disponible dans le commerce, en tant que diluant, et environ quinze parties de carbure de silicium à grains fins.
  6. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que la matière de revêtement de la couche de recouvrement est constituée d'un composé comportant environ vingt parties d'un prépolymère de polyisocyanate, en tant que résine synthétique, environ 2,5 parties d'amine tertiaire liquide, en tant que durcissant, environ vingt-cinq parties de xylène disponible dans le commerce, en tant que diluant, et environ quatre parties d'un pigment, en particulier du dioxyde de titane et de la suie.
  7. Procédé selon l'une des revendications précédentes, caractérisé par des billes creuses de silicate d'aluminium à grains fins qui sont introduites dans la matière de revêtement lors de la production de celle-ci.
EP90109050A 1989-06-08 1990-05-14 Procédé et produit de revêtement de panneaux de coffrage Expired - Lifetime EP0401551B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90109050T ATE92569T1 (de) 1989-06-08 1990-05-14 Verfahren und werkstoff zur beschichtung von schalplatten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3918664A DE3918664A1 (de) 1989-06-08 1989-06-08 Verfahren und werkstoff zur beschichtung von schalplatten
DE3918664 1989-06-08

Publications (2)

Publication Number Publication Date
EP0401551A1 EP0401551A1 (fr) 1990-12-12
EP0401551B1 true EP0401551B1 (fr) 1993-08-04

Family

ID=6382319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90109050A Expired - Lifetime EP0401551B1 (fr) 1989-06-08 1990-05-14 Procédé et produit de revêtement de panneaux de coffrage

Country Status (3)

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EP (1) EP0401551B1 (fr)
AT (1) ATE92569T1 (fr)
DE (2) DE3918664A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE469481B (sv) * 1991-06-25 1993-07-12 Leif Boerje Taraldsson Formskiva foer betonggjutform
DE4226789A1 (de) * 1992-08-13 1994-02-17 Sigri Great Lakes Carbon Gmbh Faserverstärkte Kunststoffwalze mit äußerer, verschleißfester, füllerhaltiger Kunststoffschicht
CH683547A5 (de) * 1993-01-19 1994-03-31 Otto Heinzle Segmentschalung für kreisrunde Betonmauern.
AT406685B (de) * 1995-09-25 2000-07-25 Thyssen Huennebeck Gmbh Verfahren zum beschichten von oberflächen
AT1017U1 (de) * 1995-09-25 1996-09-25 Thyssen Huennebeck Gmbh Verfahren zum beschichten von oberflächen
AT405289B (de) * 1995-09-25 1999-06-25 Thyssen Huennebeck Gmbh Verfahren zum beschichten von oberflächen
DE10029081A1 (de) * 2000-06-13 2002-01-03 Meinhard Meier Oberflächenvergütungs- und Oberflächenreparaturverfahren für Betonschaltafeln mittels Kunststoffverpackungsabfällen
EP1394338A1 (fr) * 2002-08-19 2004-03-03 Dirk Hoffmann Procédé de revêtement de panneaux, en particulier de panneaux en bois, et panneau revêtu
ITSV20030051A1 (it) * 2003-12-23 2005-06-24 Pasotti Ind Legno Struttura per la realizzazione di casseforme prefabbricate,
DE102004050564A1 (de) 2004-10-15 2006-04-27 Hünnebeck GmbH Beschichtete Schaltafel
DE102005015508B3 (de) * 2005-04-05 2007-02-08 Peri Gmbh Betonschalelement
CN102438745A (zh) * 2009-04-21 2012-05-02 阿尔比马尔欧洲有限公司 含有磷和硼的氢化处理催化剂

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3468690A (en) * 1961-08-22 1969-09-23 Us Plywood Champ Papers Inc Form boards and coatings therefor
US3650795A (en) * 1969-01-27 1972-03-21 John H Willingham Concrete form surfacing
DD154946A3 (de) * 1979-10-26 1982-05-05 Klaus Echtermeyer Nahtlose grossflaechenschalung
CH672650A5 (fr) * 1986-03-05 1989-12-15 Rolf Zollinger

Also Published As

Publication number Publication date
DE3918664A1 (de) 1990-12-20
EP0401551A1 (fr) 1990-12-12
DE59002162D1 (de) 1993-09-09
ATE92569T1 (de) 1993-08-15

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