EP0224009A1 - Panel having a core of mineral fibres, and method and apparatus for manufacturing said panel - Google Patents

Panel having a core of mineral fibres, and method and apparatus for manufacturing said panel Download PDF

Info

Publication number
EP0224009A1
EP0224009A1 EP86114343A EP86114343A EP0224009A1 EP 0224009 A1 EP0224009 A1 EP 0224009A1 EP 86114343 A EP86114343 A EP 86114343A EP 86114343 A EP86114343 A EP 86114343A EP 0224009 A1 EP0224009 A1 EP 0224009A1
Authority
EP
European Patent Office
Prior art keywords
plate
cover layer
core
layer
decor
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.)
Withdrawn
Application number
EP86114343A
Other languages
German (de)
French (fr)
Inventor
Reinhard Kalbskopf
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.)
Armstrong World Industries Inc
Original Assignee
Armstrong World Industries Inc
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 Armstrong World Industries Inc filed Critical Armstrong World Industries Inc
Publication of EP0224009A1 publication Critical patent/EP0224009A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
    • E04C2/24—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products laminated and composed of materials covered by two or more of groups E04C2/12, E04C2/16, E04C2/20
    • E04C2/246—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products laminated and composed of materials covered by two or more of groups E04C2/12, E04C2/16, E04C2/20 combinations of materials fully covered by E04C2/16 and E04C2/20
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/12—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein one or more rollers exert pressure on the material
    • B28B3/123—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein one or more rollers exert pressure on the material on material in moulds or on moulding surfaces moving continuously underneath or between the rollers, e.g. on an endless belt
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
    • E04C2/16—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of fibres, chips, vegetable stems, or the like
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/32—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material
    • E04C2/326—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material with corrugations, incisions or reliefs in more than one direction of the element

Definitions

  • the present invention relates to a plate whose core contains mineral fibers and whose surface has a three-dimensional decor. a method for producing such a plate and a device for carrying out this method.
  • the core of a typical known mineral fiber plate of the type mentioned contains about 50-70% by weight of mineral fibers. such as. Rock or slag wool. 10 - 20% of a mineral filler. for example lon and / or pearlite, and 5-15% of a binder such as starch and / or PVA copolymer.
  • a mineral filler for example lon and / or pearlite
  • a binder such as starch and / or PVA copolymer.
  • Such raw panels are often worked on. to give the surface a look that allows the use of the finished panels to form suspended ceilings in living, working or exhibition spaces.
  • the raw panels are usually also provided with a layer of paint.
  • the panel surface is additionally designed with a perforation or fissuration. which represent the decor at the same time.
  • the plate can be decorated by embossing the upper be given flat.
  • embossing the upper be given flat For this, a three-dimensional structure is given to the surface of a raw plate that is still damp or re-moistened under the pressure of an embossing cylinder. which is fixed by quickly drying the plate.
  • the embossing cylinder is usually heated so that the top sheet of the raw plate is already pre-dried or at least heated in a drying oven.
  • the disadvantage of this method is inherent. that it cannot be used to produce sharply defined, three-dimensional patterns or decors on mineral fiber boards.
  • Mineral fibers have a high modulus of elasticity and because of this modulus of elasticity, the mineral fibers cannot be plastically deformed. At the transitions between the surface of the plate and the side wall of a depression there are not only middle parts but also end parts of the fibers mentioned. the structures. At which the radius of curvature of the passage between the plate surface and the side wall of one of the recesses of the pattern is greater than 2 mm, the length of the end parts of the fibers is still so large that the thermoplastic binder, usually strong, can still hold these fiber ends sufficiently so that these retain the embossed shape and do not emerge from the surface of the side wall.
  • the surface appears rough at such curvatures, especially after the application of a layer of paint. This color layer cannot cover the protruding fiber end sections.
  • the recesses in the decor become flatter than would correspond to the height of the three-dimensional pattern on the embossing roller.
  • the object of the present invention is. to specify a cover plate made of fiber material, in which those sections of their decor are sharp. which have a small radius of curvature.
  • the invention further relates to a method for producing said plate and a device for carrying out this method, which are subordinate to claim 1 Main claims are defined.
  • the plate core 1 shows a detail from the core 1 of a mineral fiber plate. in which a deep-acting imprint has been achieved in the usual way.
  • the plate core 1 can contain 50-70% by weight of mineral fibers, for example rock or slag wool, 10-20% of a mineral filler, for example clay and / or pearlite, and 5-15% of a binder, for example starch and / or PVA copolymer.
  • a weakly concentrated, aqueous slurry is produced from the raw materials mentioned, which has a solids content of about 2-5%. This slurry is strongly concentrated on a fourdrinier (Fourdrinier plant) with simultaneous leaf formation.
  • the moist felt containing about 50% by weight of water is further dewatered or dried in an oven and a structure is formed with a density of 0.2 to 0.4 g / cm 3. which represents the plate core or the raw plate 1 mentioned below.
  • the surface of the raw plate 1 is flat.
  • an embossing agent such as an embossing roller
  • a three-dimensional pattern can be achieved in the surface of such a plate 1, which is shown in FIGS. 1 to 3.
  • Fig. 1 is a left curvature at the U ebergangsstelle shown between the surface 2 of the plate 1 and the core of the rare wall 3, one of the decoration-forming and formed in the plate core 1, recesses 4.
  • the radius R1 of the curvature of this transition point is greater than 2 mm.
  • the side wall 3 of the recess 4 is relatively smooth in such cases.
  • a transition point with a radius of curvature R2 of approximately 0.5 mm is shown.
  • the end portions 5 of individual fibers are shown schematically. which are in the area of mentioned transition. The end portions 5 of these fibers protrude from the side wall 3 of the recess 4 and protrude into the free space of the recess 4. If color is applied to such fiber end sections 5, then these fiber parts 5 are only more clearly visible.
  • the entire surface of the plate core 1 which has the three-dimensional pattern is provided with a cover layer 6.
  • the material for forming this cover layer 6 is free of mineral fibers and it also contains, among other things, a binder.
  • the material of the cover layer 6 also contains minerals which serve as lubricants and which are effective in embossing the decor. These minerals can be selected from the group of so-called layered silicates, which include mica and kaolin.
  • the thickness D of the cover layer 6 is substantially smaller than the depth T of the depressions 4 of the decoration. It can also be seen from FIG. 3 that not only the surface 2 of the raw plate 1 and the bottom of the depressions 4 therein, but also the side walls 3 of the depressions 4 are covered with the cover layer 6, wherein
  • a device which can be used to produce the plate mentioned.
  • This device contains a conveyor 10, in which the direction of movement of the frums thereof is indicated with the aid of arrows. On the left, this conveyor 10 is loaded with the cores 1 for the present plate.
  • a device 11 for preparing a coating material. which is used to form the cover layer 6.
  • This mass is passed from the device 11 to application rollers 12 and 13. The distance between these rollers 12 and 13 determines the thickness of the covering layer 6 to be applied.
  • the coating composition is transferred to the plate core 1.
  • the raw plate 1 then passes under an embossing roller 14, with the aid of which the decor is produced on the plate.
  • the mass of the coating 6 contains clay minerals, in particular layered silicates, finely ground calcium carbonate and / or other fillers, such as e.g. Perlite, as well as aids such as Emulsifiers and plastisizers.
  • the coating composition contains no fibers.
  • the coating composition 6 advantageously consists of a finely dispersed aqueous slurry with a solids content of 40-60% by weight.
  • high plasticity kaolin makes 30-40% and calcium carbonate 0-20%, with about 50% of the grains of calcium carbonate being less than 10 my.
  • 1-5% by weight of binder is added in the form of starch paste or PVA copolymer.
  • An emulsifier is added as an aid, namely about 1-5 g of hexametaphosphate per liter of slurry.
  • the concentration of the slurry of solids Because when applying the slurry, a certain amount of water from this slurry has to penetrate into the plate surface in order to soften the layer of the plate material and thereby make it deformable for subsequent embossing. On the other hand, the stated amount of water that penetrates the surface of the board must not exceed a certain limit, for example of 0.1 L / m2.
  • the capillarity of the porous mineral fiber raw plate 1 causes one Dehydration from the applied slurry, which is all the greater. the drier the raw board 1 is.
  • the coating station 11, 12, 13 (FIG. 4) and the subsequent embossing roller 14, which is located above the conveyor belt 10.
  • the size of this distance E is chosen so that the liquid contained in the cover layer mass, e.g. Water can penetrate into the surface area of the plate core 1 in order to soften the material therein.
  • the decor is embossed into the plate 1 with the aid of the roller 14.
  • a heating element 15 can advantageously be assigned to the embossing roller 14, which heats up that section of the embossing roller 14 which will come into contact with the cover layer 6.
  • a convection oven 16 then follows the embossing roller 14, in which the coated plates 1 are dried. Under certain circumstances, the embossing roller 14 can be preceded by a heating source 17 for preheating the raw plates 1.
  • the covering layer 6 is pressed into the depth of the plate 1 by the protruding parts of the embossing roller 14 together with the plate fibers underneath, as is shown in detail in FIG. 2. Not only the middle parts but also the end parts of those plate fibers are deepened by the flanks of the projections on the embossing cylinder 14. d jerks. which are located in the area of the respective recess edge. Since the embossing cylinder 14 is hot, the binder binds relatively quickly in the material of the cover layer 6, in any case while this material is still under the embossing roller 14. As a result, the shape of the area of the cover layer 6 lying under the stamping roller 14 is fixed. However, this also fixes the shape of those sections of the plate fibers which are located under the projections of the embossing roller 14.
  • the fiber sections mentioned are incorporated or quasi "frozen" in the hardened material of the cover layer 6.
  • these fiber sections can be central portions of the fibers or end portions thereof.
  • the central parts of fibers can be removed after relieving them, i.e. after they leave the area of the prover roller 14, do not spring back. so that not only convex but also concave edges of the decor can be sharp.
  • the Side walls 3 of the depressions 4 are covered with the cover layer 6, under the surface of which the deformed end portions of the fibers are held. Since the side walls 3 of the depressions 4 are very steep, particularly with small radii R of the decor, it is not easily achieved that the mineral layer 6 located on the initially flat surface of the raw plate 1 also forms a coherent layer after the embossing process . So that the initially flat cover layer 6 does not tear off in the area of the convex recessed edges during the stamping process, the material of the cover layer b contains the layer silicates already mentioned. which in the area of the protruding edges of the depressions 4 act approximately as a lubricant. Because they work.
  • the other particles of the top layer material slide under the intermediate layer of the layered silicate particles during the embossing process and can thus be evenly distributed over the side walls 3 of the depressions 4 before the binder sets in the top layer 6 and the top layer 6 thereby hard and dimensionally stable becomes.
  • the layer 6 thus coherently covers not only the surface 2 of the plate core 1 but also the side walls 3 and the bottom 7 of the depressions 4.
  • the embossing means 14 can be shown in FIG. 2 as practically straight, because the width of this cutout is made the pre roller 14 is very small compared to the diameter thereof.
  • the embossed decor becomes all the more precise - smaller radii of the convex edges thereof - the drier the top coat 6 is before it gets under the embossing roller 14.
  • This coat of paint 6 must of course not be dust-dry.
  • the embossing thus takes place in a semi-dry layer 6, from which the moisture has been removed by capillary forces in the top flake layer of the plate 1.
  • the cover layer b deforms plastically and pasty thanks to the lubricant additive mentioned, so that no cracks can occur in this layer 6.
  • the concentration of the slurried top coat 6 must be so great that in the gradient of the forces - capillary force of the dry plate and retention capacity of the coat 6 - just as much water has penetrated the plate as is necessary to soften it in the area of the decor depth reach and, on the other hand, as little water as possible remains in the top coat. It is therefore not a question of an equilibrium in the structure of the top layer 6 and plate 1 and therefore the time period between the application of the top layer suspension and the contact with the embossing roller 14 is of crucial importance.
  • the temperature of the embossing roller 14 can also be changed here and the speed of the conveyor 10 can be used to control the manufacturing process.
  • the temperature of the embossing cylinder 14 should significantly exceed the temperature of 100 degrees C.
  • the process for producing the labeled plate is characterized, among other things, by this. that on the surface of the respective plates Ernes K 1, the material of the covering layer 6 is applied in the form of a slurry and that the covering layer 6 provided with this surface 2 of the green sheet 1 by embossing with the desired decoration is provided.
  • the moisture of the slurry is so chosen that most of the liquid from the slurry passes into the material of the plate core 1, the rest of the liquid, which the cover layer 6 retains until being embossed, not exceeding 20%.
  • the unevenness of the surface of the plate core 1 can be eliminated, for example by grinding, in order to be able to apply a layer of the same thickness everywhere. If necessary, the surface can also be treated so that it has the same absorbency everywhere. This is achieved, for example, by scraping off an upper layer of the raw plate 1. Because the crust forming the surface of the raw plate 1 has a higher fine fraction and it is therefore condensed. Specific density differences create areas of the plate surface with more or less good absorption capacity. The ground raw board does not have such differences in absorbency and can therefore be coated evenly.
  • the raw panels fed to the facility can still be damp or already dry from dust.
  • the surface of the same has to be moistened, but only as much. that the liquid penetrates practically only as deep into the plate core 1 as is to be embossed in it. Only then is the surface of the plate core 1 provided with the cover layer 6.
  • the degree of moistening of such a plate can be controlled by the concentration of the slurry to be applied or / and by spraying the plate with water.
  • the surface temperature of the embossing cylinder 14 must be selected such that sufficient thermal energy is available to at least partially dry both the mineral cover layer 6 and the layer of the plate mass immediately below it from residual moisture or water that has penetrated because of the binding of the binder . This process must be carried out sufficiently quickly so that the escaping water vapor between the roller surface 14 and the mineral Layer 6 can form a steam cushion, which prevents the cover layer 6 from caking on the roller 14 and thereby prevents the decoration from being destroyed when the embossing cylinder 14 rolls off.
  • the mineral layer 6 and an approximately 2 mm deep zone of the plate surface are dried. This drying causes the hardening of the binder in the cover layer 6 and thus fixes both the shape of the embossed three-dimensional decor and the shape of the fiber ends which these fiber ends were given during the embossing process.
  • the residual water content of the plate core 1 is removed in the hot air drying oven 16 by this moisture escaping from the plate through the cover layer b.
  • the components of the cover layer 6 must therefore always be selected such that the hardened cover layer 6 is also porous.
  • the heat exchange between the embossing cylinder 14 and the still moist cover layer 6 would be too small to be able to heat sufficient water in the cover layer 6 to the boiling point during the contact time available with the embossing cylinder 14. If an increase in the throughput speed were necessary, the moist layer 6 would have to be preheated by the aforementioned heating source 17, which is designed as an infrared radiator, a hot air source or the like can before the layer gets under the embossing cylinder 14.
  • reaction time E causes the starch paste that binds the fibers to dissolve, which then penetrates to the surface of the plate under the pressure of the moste roller and causes discoloration there.
  • the mass 6 intended for coating the raw plate 1 consists of a finely dispersed aqueous slurry with a solids content of 50% by weight.
  • high plasticity makes kaolin 35% and calcium carbonate 12%, with about 50% of the grains of calcium carbonate being smaller than 10 m.
  • 3% by weight of binder is added in the form of starch paste.
  • An emulsifier is added as an aid, namely about 3 g of hexametaphosphate per liter of slurry.
  • This mass is applied to the raw plate 1 by means of the rollers 12 and 13 during a single pass under them.
  • the amount of slurry applied to the raw slabs 1 is selected so that 150-250 g is distributed over 1 m2.
  • the amount of 200 g proved to be particularly advantageous.
  • the reaction time required for the mutual interaction between the material of the raw plate 1 and the material of the slurry 6 is generally 10 seconds. During this period, the slurry loses about 50% by weight of its water content, which in the raw plate under the influence of gravitation and capillary forces penetrates. First of all, this causes the outer layer 6 to be physically predried. In the raw plate 1, the water which has penetrated causes the starch binder to soften.
  • the plate core 1 pretreated in this way passes through the stamping station 14, 15 at a speed which is at least 12 m / min.
  • the moisture that is inside the plate escapes.
  • the three-dimensional pattern on the embossing roller 14 can also have sections which should form edges in the plate decor with a radius between 0.3 to 2 mm. Such edges can be easily reached using the described method.

Abstract

The panel has a core (1) containing mineral fibres bound with one another. The surface of this core (1) is provided with a three-dimensional decoration. Both the walls (3, 7) of the recesses (4) forming the decoration and the portions of the surface (2) of the panel core which are located between these are equipped with a covering layer (6), the thickness (D) of this covering layer (6) being smaller than the depth (T) of the recesses (4). The covering layer (6) contains at least one of the laminated silicates, such as, for example, kaolin and/or mica, in finely distributed form. The use of the covering layer mentioned makes it possible to emboss three-dimensional structures in the panel surface which in the plane perpendicular to the panel plane have radii of curvature substantially smaller than 2 mm, and these can even be smaller than 0.5 mm. <IMAGE>

Description

Die vorliegende Erfindung oetrifft eine Platte, deren Kern Mineralfasern enthält und deren Oberfläche einen dreidimensionaien Dekor aufweist. ein verfahren zur Herstellung einer solchen Platte sowie eine Einrichtung zur Durchführung dieses verfahrens.The present invention relates to a plate whose core contains mineral fibers and whose surface has a three-dimensional decor. a method for producing such a plate and a device for carrying out this method.

Der Kern einer typischen bekannten Mineraliaserplatte der genannten Art enthält etwa 50 - 70 Gew Mineralfasern. wie z.B. Stein- oder Schlackenwolle. 10 - 20 % eines mineralischen Füllstoffes. beispielsweise lon und/oder Perlit, und 5 - 15 % eines Bindemittels, wie z.B StärKe und/oder PVA-Copolymer. Solche Rohplatten werden oft weiterbedrbeitet. um der Oberfläche derselben ein Aussehen zu verleihen, welches die Verwendung der fertigen Platten zur Bildung abgehängter Decken in Wohn-, Arbeits- oder Ausstellungsräumen erlaubt. Die Rohplatten werden in der Regel auch mit einer Farbschicht versehen. Zur Verbesserunq der akustischen Dämmung wird die Plattenoberfläche zusätzlich mit einer Perforation oder Fissuration ausgeführt. welche gleicnzeitig den Dekor darstellen.The core of a typical known mineral fiber plate of the type mentioned contains about 50-70% by weight of mineral fibers. such as. Rock or slag wool. 10 - 20% of a mineral filler. for example lon and / or pearlite, and 5-15% of a binder such as starch and / or PVA copolymer. Such raw panels are often worked on. to give the surface a look that allows the use of the finished panels to form suspended ceilings in living, working or exhibition spaces. The raw panels are usually also provided with a layer of paint. In order to improve the acoustic insulation, the panel surface is additionally designed with a perforation or fissuration. which represent the decor at the same time.

Ein Dekor kann der Platte unter anderem durch Prägung der Oberflache gegeben werden. Hierfür wird der Oberfläche einer noch feuchten oder wieder befeuchteten Rohplatte unter dem Druck eines Prägezylinders eine dreidimensionale Struktur gegeben. welche durch rasches Trocknen der Platte fixiert wird. Hierfür wird der Prägezylinder meist erhitzt, sodass die Oberflacne der Rohplatte bereits vorgetrocknet oder zumindest erwärmt in einen Trockenofen gelangt. Diesem Verfahren haftet der Nachteil an. dass sich damit keine scharf begrenzten, dreidimensionalen Muster bzw. Dekore auf Mineralfaserplatten herstellen lassen.The plate can be decorated by embossing the upper be given flat. For this, a three-dimensional structure is given to the surface of a raw plate that is still damp or re-moistened under the pressure of an embossing cylinder. which is fixed by quickly drying the plate. For this purpose, the embossing cylinder is usually heated so that the top sheet of the raw plate is already pre-dried or at least heated in a drying oven. The disadvantage of this method is inherent. that it cannot be used to produce sharply defined, three-dimensional patterns or decors on mineral fiber boards.

Mineralfasern haben ja einen hohen Elastizitatsmodul und wegen dieses Elastizitätsmoduls lassen sich die Mineralfasern nicht plastisch verformen. An den Uebergangen zwischen der Oberfläche der Platte und der Seitenwand einer Vertiefung in dieser befinden sich nicht nur mittlere Partien sondern auch Endpartien der qenannten Fasern. dei Strukturen. bei welchen der Krümmungsradius des Uebarganges zwischen der Plattenoberflache und der Seitenwand einer der Vertiefungen des Musters grösser ist als 2 mm, ist die Länge der Endpartien der Fasern noch so gross, dass der thermoplastische Binder, üblicherweise Starke, diese Faserenden noch ausreichend festhalten kann, sodass diese die aufgeprägte Form behalten und aus der Oberfläche der Seitenwand nicht austreten. Bei kleineren Krümmungsradien der genannten Uebergangsstellen bietet sich für das Bindemittel in der Platte jedoch nicht genügend Angriffsfläche an den Fasern. sodass sich jene Fasern nach Druckentlastung wieder strecken. deren kurze Endpartien in dem einen kleinen Radius aufweisenden Uebergangsbereich der jeweiligen Vertiefung liegen.Mineral fibers have a high modulus of elasticity and because of this modulus of elasticity, the mineral fibers cannot be plastically deformed. At the transitions between the surface of the plate and the side wall of a depression there are not only middle parts but also end parts of the fibers mentioned. the structures. At which the radius of curvature of the passage between the plate surface and the side wall of one of the recesses of the pattern is greater than 2 mm, the length of the end parts of the fibers is still so large that the thermoplastic binder, usually strong, can still hold these fiber ends sufficiently so that these retain the embossed shape and do not emerge from the surface of the side wall. With smaller radii of curvature of the transition points mentioned, however, there is not enough contact surface on the fibers for the binder in the plate. so that those fibers stretch again after pressure relief. the short end parts of which lie in the transition area of the respective depression which has a small radius.

Wegen der in den Freiraum der Vertiefung hervorstehenden faserabschnitte erscheint die Oberfläche an solchen Krümmungen, vor allem nach dem Auftragen einer Farbschicht, rauh. Denn diese Farbschicnt kann die abstehenden Faserendabschnitte nicht aodecken. Ausserdem werden die Vertiefungen des Dekors wegen der Grösse des genannten Elastizitatsmoduls flacher als dies der Höhe des dreidimensionalen Musters an der Prägewalze entsprechen würden.Because of the fiber sections protruding into the free space of the depression, the surface appears rough at such curvatures, especially after the application of a layer of paint. This color layer cannot cover the protruding fiber end sections. In addition, because of the size of the elastic module mentioned, the recesses in the decor become flatter than would correspond to the height of the three-dimensional pattern on the embossing roller.

Die Aufgabe der vorliegenden Erfindung ist. eine Deckplatte aus Fasermaterial anzugeben, bei der auch jene Abschnitte ihres Dekors scharf sind. welche einen Kleinen Krümmungsradius aufweisen.The object of the present invention is. to specify a cover plate made of fiber material, in which those sections of their decor are sharp. which have a small radius of curvature.

Diese Aufgabe wird bei der eingangs genannten Platte erfindungsgemäss so gelöst, wie dies im kennzeichnenden Teil des Anspruchs 1 definiert ist.This object is achieved according to the invention in the aforementioned plate as defined in the characterizing part of claim 1.

Die Erfindung betrifft ferner ein Verfahren zur Herstellung der genannten Platte sowie eine Einrichtung zur Durchführung dieses Verfahrens, wobei diese in den dem Anspruch 1 untergeordneten Hauptansprücnen definiert sind.The invention further relates to a method for producing said plate and a device for carrying out this method, which are subordinate to claim 1 Main claims are defined.

Nachstehend werden Ausführungsbeispiele der vorliegenden Erfindung anhand der beiliegenden Zeichnungen näher erläutert. Es zeigt:

  • Fig. 1 einen Ausschnitt aus einer Mineralfaserplatte, bei der die tiefe Prägung in herkömmlicher Weise erreicht worden ist,
  • Fig. 2 einen Ausschnitt aus einer Mineralfaserplatte, bei der die tiefgehende Prägung in erfindungsgemässer Weise mit Hilfe einer Prägewalze gebildet wird.
  • Fig. 3 einen Ausschnitt aus einer fertigen Platte, die in der aus Fig. 2 ersichtlichen Weise hergestellt worden ist und
  • Fiq. 4 schematisch eine Einrichtung zur Durchführung des vorliegenden Verfahrens.
Exemplary embodiments of the present invention are explained in more detail below with reference to the accompanying drawings. It shows:
  • 1 shows a section of a mineral fiber board, in which deep embossing has been achieved in a conventional manner,
  • Fig. 2 shows a section of a mineral fiber board, in which the deep embossing is formed in the manner according to the invention with the aid of an embossing roller.
  • Fig. 3 shows a section of a finished plate, which has been produced in the manner shown in Fig. 2 and
  • Fiq. 4 schematically shows a device for carrying out the present method.

In Fig. 1 ist ein Ausschnitt aus dem Kern 1 einer Mineralfaserplatte dargestellt. bei dem eine tiefwirkende Prägung in der bisher üblichen Weise erreicnt worden ist. Der Plattenkern 1 kann 50 - 70 Gew % Mineralfasern, z.B. Stein- oder Schlackenwolle, 10 - 20 % eines mineralischen Füllstoffes, z.B. Ton und/oder Perlit, und 5 - 15 % eines Bindemittels, z.B. Stärke und/oder PVA-Copolymer enthalten. Zur Herstellung solcher Plattenkerne 1 bzw. Rohplatten wird aus den genannten Rohstoffen eine schwach konzentrierte, wässrige Aufschlämmung hergestellt, die etwa 2 - 5 % Feststoffgehalt aufweist. Diese Aufschlämmung wird auf einem Langsieb (Fourdrinier-Anlage) unter gleichzeitiger Blattbildung stark aufkonzentriert. Der etwa 50 Gew % Wasser enthaltende, feuchte Filz wird in einem Ofen weiter entwässert bzw. getrocknet und es entsteht ein Gebilde mit einer Dichte von 0,2 bis 0.4 g/cm3. welches den Plattenkern bzw. die im nachstehenden genannte Rohplatte 1 darstellt. Nach Verlassen des Ofens ist die Oberfläche der Rohplatte 1 plan. Mit Hilfe eines Prägemittels. wie z.B. einer Prägewalze, kann man ein dreidimensionales Muster in der Oberfläche einer solchen Platte 1 erreichen, das in Fig. 1 bis 3 dargestellt ist. Falls erforderlich, so wird die Oberflächenschicht der Rohplatte. in die geprägt werden soll. aufgeweicht. Denn die Oberflacne einer trockenen Rohplatte ist spröde und es konnten keine Muster mit zusammenhängenden Kanten gebildet werden.1 shows a detail from the core 1 of a mineral fiber plate. in which a deep-acting imprint has been achieved in the usual way. The plate core 1 can contain 50-70% by weight of mineral fibers, for example rock or slag wool, 10-20% of a mineral filler, for example clay and / or pearlite, and 5-15% of a binder, for example starch and / or PVA copolymer. To produce such plate cores 1 or raw plates, a weakly concentrated, aqueous slurry is produced from the raw materials mentioned, which has a solids content of about 2-5%. This slurry is strongly concentrated on a fourdrinier (Fourdrinier plant) with simultaneous leaf formation. The moist felt containing about 50% by weight of water is further dewatered or dried in an oven and a structure is formed with a density of 0.2 to 0.4 g / cm 3. which represents the plate core or the raw plate 1 mentioned below. After leaving the furnace, the surface of the raw plate 1 is flat. With the help of an embossing agent. such as an embossing roller, a three-dimensional pattern can be achieved in the surface of such a plate 1, which is shown in FIGS. 1 to 3. If necessary, the surface layer of the raw board. in which to be minted. softened. Because the top surface of a dry raw panel is brittle and no patterns with contiguous edges could be formed.

Im Ausschnitt gemäss Fig. 1 ist links eine Krümmung an der Uebergangsstelle zwischen der Oberfläche 2 des Plattenkernes 1 und der Seltenwand 3 einer der den Dekor bildenden und im Plattenkern 1 ausgebildeten Vertiefungen 4 gezeigt. Der Radius R1 der Krümmung dieser Uebergangsstelle ist grösser als 2 mm. Die Seitenwand 3 der Vertiefung 4 ist in solchen Fällen verhältnismässig glatt. Rechts in Fig. 1 ist dagegen eine Uebergangsstelle mit einem Krümmungsradius R2 von etwa 0.5 mm dargestellt. Bei dieser Uebergangsstelle sind die Endpartien 5 einzelner Fasern schematisch dargestellt. die sich im Bereich des genannten Ueberganges befinden. Die Endpartien 5 dieser Fasern stehen von der Seitenwand 3 der Vertiefung 4 ab und ragen in den Freiraum der Vertiefung 4 hinein. Wenn auf solche Faserendabschnitte 5 Farbe aufgetragen wird, dann werden diese Fasernteile 5 nur noch deutlicher ersichtlich.In detail according to Fig. 1 is a left curvature at the U ebergangsstelle shown between the surface 2 of the plate 1 and the core of the rare wall 3, one of the decoration-forming and formed in the plate core 1, recesses 4. The radius R1 of the curvature of this transition point is greater than 2 mm. The side wall 3 of the recess 4 is relatively smooth in such cases. In contrast, on the right in FIG. 1, a transition point with a radius of curvature R2 of approximately 0.5 mm is shown. At this transition point, the end portions 5 of individual fibers are shown schematically. which are in the area of mentioned transition. The end portions 5 of these fibers protrude from the side wall 3 of the recess 4 and protrude into the free space of the recess 4. If color is applied to such fiber end sections 5, then these fiber parts 5 are only more clearly visible.

Um zu verhindern, dass die genannten Faserenden 5 aus den Seitenwänden 3 der Vertiefungen 4 austreten, ist die gesamte Oberflache des das dreidimensionale Muster ausfweisenden Plattenkernes 1 mit einer Deckschicht 6 versehen. Das Material zur Bildung dieser Deckschicht 6 ist frei von Mineralfasern und es enthalt unter anderem auch ein Bindmittel. Neben diesem bindemittel enthält das Material der Deckschicht 6 auch Mineralien, welche als Gleitmittel dienen und welche beim Prägen des Dekors wirksam sind. Diese Mineralien können aus der Gruppe der sogenannten Schichtsilikate ausgewählt werden, zu der Glimmer und Kaolin gehören.In order to prevent the said fiber ends 5 from emerging from the side walls 3 of the depressions 4, the entire surface of the plate core 1 which has the three-dimensional pattern is provided with a cover layer 6. The material for forming this cover layer 6 is free of mineral fibers and it also contains, among other things, a binder. In addition to this binder, the material of the cover layer 6 also contains minerals which serve as lubricants and which are effective in embossing the decor. These minerals can be selected from the group of so-called layered silicates, which include mica and kaolin.

in Fig. 3 ist ein Ausschnitt aus der fertigen Platte dargestellt. Hieraus ist vor allem ersichtlich, dass die Dicke D der Deckschicht 6 wesentlich kleiner ist als die Tiefe T der Vertiefungen 4 des Dekors. Ausserdem ist aus Fig. 3 ersichtlich, dass nicht nur die Oberfläche 2 der Rohplatte 1 und der Boden der Vertiefungen 4 in dieser, sondern auch die Seitenwände 3 der Vertiefungen 4 mit der Deckschicht 6 überzogen sind, wobei3 shows a section of the finished plate. From this it can be seen above all that the thickness D of the cover layer 6 is substantially smaller than the depth T of the depressions 4 of the decoration. It can also be seen from FIG. 3 that not only the surface 2 of the raw plate 1 and the bottom of the depressions 4 therein, but also the side walls 3 of the depressions 4 are covered with the cover layer 6, wherein

die Schicht 6 aus der so verformten Oberfläche der Platte zusamenhängend ist. Aus Fig. 3 ist schliesslich ersichtlich, dass auch im Bereich des rechts liegenden Ueberganges zwischen der Plattenoberfläche 2 und der Seitenwand 3 einer der Vertiefungen 4 keine abstehenden Faserenden vorhanden sind. Dieser Uebergang weist ja einen sehr kleinen Radius R2 auf. wie dies im Zusammenhang mit Fig. 1 erläutert worden ist.the layer 6 is coherent from the thus deformed surface of the plate. Finally, it can be seen from FIG. 3 that there are no protruding fiber ends in the area of the right-hand transition between the plate surface 2 and the side wall 3 of one of the depressions 4. This transition has a very small radius R2. as has been explained in connection with FIG. 1.

In Fig. 4 ist eine Einrichtung dargestellt, die zur Herstellung der genannten Platte verwendet werden kann. Diese Einrichtung enthält einen Förderer 10, bei welchem die Bewegungsrichtung der frums desselben mit hilfe von Pfeilen angedeutet ist. Links wird dieser Förderer 10 mit den Kernen 1 für die vorliegende Platte beschickt. Im Bereich der Anfangspartie des Förderers 10 befindet sich eine Vorrichtung 11 zur Zubereitung einer Beschichtungsmasse. welche zur Bildung der Deckschicht 6 verwendet wird. Diese Masse wird von der Vorrichtung 11 zu Auftragrollen 12 und 13 geleitet. Der Abstand dieser Rollen 12 und 13 voneinander bestimmt die Dicke der aufzutragenden Deckschicht 6. Mittels der tiefer liegenden Rolle 13, die auf dem Plattenkern 1 abrollen kann, wird die 8eschichtungsmasse auf den Plattenkern 1 übertragen. Die Rohplatte 1 gelangt dann unter eine Prägewalze 14, mit deren Hilfe der Dekor auf der Platte hergestellt wird.In Fig. 4, a device is shown which can be used to produce the plate mentioned. This device contains a conveyor 10, in which the direction of movement of the frums thereof is indicated with the aid of arrows. On the left, this conveyor 10 is loaded with the cores 1 for the present plate. In the area of the starting part of the conveyor 10 there is a device 11 for preparing a coating material. which is used to form the cover layer 6. This mass is passed from the device 11 to application rollers 12 and 13. The distance between these rollers 12 and 13 determines the thickness of the covering layer 6 to be applied. By means of the underlying roller 13, which can roll on the plate core 1, the coating composition is transferred to the plate core 1. The raw plate 1 then passes under an embossing roller 14, with the aid of which the decor is produced on the plate.

Als wesentliche Bestandteile enthält die Masse der Beschichtung 6 neben einem Bindemittel Tonmineralien, insbesondere Schichtsilikate, feingemahlenes Kalziumkarbonat und/oder andere Füllstoffe, wie z.B. Perlit, sowie Hilfsmittel, wie z.B. Emulgatoren und Plastisiser. Die Beschichtungsmasse enthält keine Fasern.In addition to a binder, the mass of the coating 6 contains clay minerals, in particular layered silicates, finely ground calcium carbonate and / or other fillers, such as e.g. Perlite, as well as aids such as Emulsifiers and plastisizers. The coating composition contains no fibers.

Die Beschichtungsmasse 6 besteht vorteilhaft aus einer feindispersen wässrigen Aufschlammung mit 40-60 Gew % Feststoffanteil. Davon machen hohe Plastizität aufweisendes Kaolin 30-40 % und Kalziumkarbonat 0-20 %, wobei etwa 50 % der Körner von Kalziumkarbonat Kleiner als 10 my sind. Daneben wird 1-5 Gew % Bindemittel in Form von Stärkekleister oder PVA-Copolymer beigegeben. Als Hilfsmittel wird ein Emulgator zugesetzt, und zwar etwa 1-5 g Hexametaphosphat pro Liter Aufschlämmung.The coating composition 6 advantageously consists of a finely dispersed aqueous slurry with a solids content of 40-60% by weight. Of this, high plasticity kaolin makes 30-40% and calcium carbonate 0-20%, with about 50% of the grains of calcium carbonate being less than 10 my. In addition, 1-5% by weight of binder is added in the form of starch paste or PVA copolymer. An emulsifier is added as an aid, namely about 1-5 g of hexametaphosphate per liter of slurry.

Besonderes Augenmerk muss der Konzentration der Aufschlämmunq an Feststoffen gelten. Denn beim Auftragen der Aufschlammung muss eine gewisse Menge Wasser aus dieser Aufschlämmung in die Plattenoberfläche eindringen, um die Schicht des Plattenmaterials aufzuweichen und dadurch für eine nachfolgende Prägung verformbar zu machen. Auf der anderen Seite darf die genannte Menge Wasser, die in die Plattenoberfläche eindringt, eine bestimmte Grenze, z.B. von 0,1 L/m2, nicht überschreiten. Die Kapilaritat der porösen Mineralfaser-Rohplatte 1 bewirkt einen Wasserentzug bei der aufgetragenen Aufschlammung, der um so grösser ist. je trockener die Rohplatte 1 ist.Particular attention must be paid to the concentration of the slurry of solids. Because when applying the slurry, a certain amount of water from this slurry has to penetrate into the plate surface in order to soften the layer of the plate material and thereby make it deformable for subsequent embossing. On the other hand, the stated amount of water that penetrates the surface of the board must not exceed a certain limit, for example of 0.1 L / m2. The capillarity of the porous mineral fiber raw plate 1 causes one Dehydration from the applied slurry, which is all the greater. the drier the raw board 1 is.

Zwischen der Beschichtungsstation 11, 12, 13 (Fig. 4) und der darauf folgenden Prägewalze 14, welche sich oberhalb des Förderbandes 10 befindet, ist eine bestimmte Entfernung E vorhanden. Die Grösse dieser Entfernung E ist so gewählt, dass die in der Deckschichtmasse enthaltene Flüssigkeit, z.B. Wasser, in den Oberflächenbereich des Plattenkernes 1 eindringen kann, um das Material in diesem dereich aufzuweichen. Am Ende der genannten Strecke E wird der Dekor mit Hilfe der Walze 14 in die Platte 1 eingeprägt. Vorteilhaft kann der Pragewalze 14 ein Heizkörper 15 zugeordnet sein, welcher jenen Abschnitt der Prägewalze 14 erwärmt, der mit der Deckschicht 6 in Berührung kommen wird. Auf die Prägewalze 14 folgt dann ein Umluftofen 16, in dem die beschichtete Platten 1 getrocknet werden. Unter Umständen kann der Prägewalze 14 eine Heizquelle 17 zum Vorwärmen der Rohplatten 1 vorgeschaltet sein.There is a certain distance E between the coating station 11, 12, 13 (FIG. 4) and the subsequent embossing roller 14, which is located above the conveyor belt 10. The size of this distance E is chosen so that the liquid contained in the cover layer mass, e.g. Water can penetrate into the surface area of the plate core 1 in order to soften the material therein. At the end of the distance E mentioned, the decor is embossed into the plate 1 with the aid of the roller 14. A heating element 15 can advantageously be assigned to the embossing roller 14, which heats up that section of the embossing roller 14 which will come into contact with the cover layer 6. A convection oven 16 then follows the embossing roller 14, in which the coated plates 1 are dried. Under certain circumstances, the embossing roller 14 can be preceded by a heating source 17 for preheating the raw plates 1.

Die Deckschicht 6 wird durch die vorspringenden Teile der Prägewalze 14 samt den darunter liegenden Plattenfasern in die Tiefe der Platte 1 eingedrückt, wie dies in Fig. 2 ausschnittweise gezeigt ist. Hierbei werden nicht nur die mittleren Partien sondern auch die Endpartien jener Plattenfasern durch die Flanken der Vorsprünge am Prägezylinder 14 in die Tiefe ge- druckt. die sich im Bereich der jeweiligen Vertiefungskante befinden. Da der Pragezylinder 14 heiss ist, bindet das Bindemittel im Material der Deckschicht 6 verhältnismässig schnell ab, auf jeden Fall während sich dieses Material noch unter der Pragewalze 14 befindet. Dadurch ist die Form des unter der Pragewalze 14 liegenden Bereiches der Deckschicht 6 fixiert. Dadurch ist jedoch auch die Form jener Abschnitte der Plattenfasern fixiert, die sich unter den Vorsprüngen der Praägewalze 14 befinden.The covering layer 6 is pressed into the depth of the plate 1 by the protruding parts of the embossing roller 14 together with the plate fibers underneath, as is shown in detail in FIG. 2. Not only the middle parts but also the end parts of those plate fibers are deepened by the flanks of the projections on the embossing cylinder 14. d jerks. which are located in the area of the respective recess edge. Since the embossing cylinder 14 is hot, the binder binds relatively quickly in the material of the cover layer 6, in any case while this material is still under the embossing roller 14. As a result, the shape of the area of the cover layer 6 lying under the stamping roller 14 is fixed. However, this also fixes the shape of those sections of the plate fibers which are located under the projections of the embossing roller 14.

Man Kann sich vorstellen, dass die genannten Faserabscnnitte im ernarteten Material der DecKschicht 6 eingebunden oder quasi "eingefroren" sind. Diese Faserabschnitte konnen, wie gesagt, mittiere Partien der Fasern oder EndDartien derselben sein. Die mittieren Partien von Fasern können nach der Entlastung derselben, d.h. nachdem sie den Bereich der Pragewalze 14 verlassen naben, nicht mehr zuruckfedern. so dass nicht nur konvexe sondern auch konkave Kanten des Dekors scharf sein können. Zugleich gibt es im Bereich der konvexen Kanten des Dekors keine abstenenden Faserenden mehr. Dies deswegen, weil das Bindemittel. das sich im Material der erhärteten Deckschicht 6 befindet, die durch den Pragezylinder 14 verformten Endpartien der Fasern unter der Oberfläche der Deckschicht 6 hält.It can be imagined that the fiber sections mentioned are incorporated or quasi "frozen" in the hardened material of the cover layer 6. As said, these fiber sections can be central portions of the fibers or end portions thereof. The central parts of fibers can be removed after relieving them, i.e. after they leave the area of the prover roller 14, do not spring back. so that not only convex but also concave edges of the decor can be sharp. At the same time, there are no more fiber ends at the convex edges of the decor. This is because the binder. which is in the material of the hardened cover layer 6, which holds end portions of the fibers deformed by the embossing cylinder 14 below the surface of the cover layer 6.

Um diesen Effekt zu erreichen, ist es notwendig, dass auch die Seitenwände 3 der Vertiefungen 4 mit der Deckschicht 6 überzogen sind, unter deren Oberfläche die verformten Endpartien der Fasern gehalten sind. Da die Seitenwände 3 der Vertiefungen 4, besonders bei kleinen Radien R des Dekors, sehr steil sind, erreicht man es nicht ohne weiteres, dass die sich auf der zunächst planen Oberfläche der Rohplatte 1 befindliche mineralische Schicht 6 auch nach dem Prägevorgang eine zusammenhängende Schicht bildet. Damit die zunächst plane Deckscnicht 6 im Bereich der konvexen vertiefungskanten während des Prägevorganges nicht abreisst, enthält das Material der Deckschicht b die bereits erwähnten Schichtsillikate. welche sich im Bereich der vorspringenden Kanten der Vertiefungen 4 etwa als ein Gleit- bzw. Schmiermittel auswirken. Denn sie bewirken. dass die übrigen Partikeln des Deckschichtmaterials unter der Zwischenlage der Schichtsillikat-Partikeln während des Pragevorganges aufeinander gleiten und sich somit auch über die stellen Seitenwände 3 der vertiefungen 4 gleicmhässig verteilen lassen, bevor das Bindemittel in der Deckschicht 6 abbindet und die Deckschicht 6 dadurch hart und formstabil wird.In order to achieve this effect, it is necessary that the Side walls 3 of the depressions 4 are covered with the cover layer 6, under the surface of which the deformed end portions of the fibers are held. Since the side walls 3 of the depressions 4 are very steep, particularly with small radii R of the decor, it is not easily achieved that the mineral layer 6 located on the initially flat surface of the raw plate 1 also forms a coherent layer after the embossing process . So that the initially flat cover layer 6 does not tear off in the area of the convex recessed edges during the stamping process, the material of the cover layer b contains the layer silicates already mentioned. which in the area of the protruding edges of the depressions 4 act approximately as a lubricant. Because they work. that the other particles of the top layer material slide under the intermediate layer of the layered silicate particles during the embossing process and can thus be evenly distributed over the side walls 3 of the depressions 4 before the binder sets in the top layer 6 and the top layer 6 thereby hard and dimensionally stable becomes.

Nach dem Prägevorgang bedeckt die Schicht 6 somit zusammenhängend nicht nur die Oberfläche 2 des Plattenkernes 1 sondern auch die Seitenwände 3 und den Boden 7 der Vertiefungen 4. Das Prägemittel 14 kann in Fig. 2 als praktisch geradlinig dargestellt sein, weil die Breite dieses Ausschnittes aus der Prägewalze 14 im Vergleich mit dem Durchmesser derselben sehr klein ist.After the embossing process, the layer 6 thus coherently covers not only the surface 2 of the plate core 1 but also the side walls 3 and the bottom 7 of the depressions 4. The embossing means 14 can be shown in FIG. 2 as practically straight, because the width of this cutout is made the pre roller 14 is very small compared to the diameter thereof.

Der geprägte Dekor wird um so präziser - kleinere Radien der konvexen Kanten desselben- je trockener der Deckanstrich 6 ist, bevor dieser unter die Prägewalze 14 gelangt. Dieser Anstrich 6 darf freilich nicht staubtrocken sein. Die Prägung erfolgt somit in eine halbtrockene Schicht 6, welcher die Feuchtigkeit durch Kapillare Kräfte in der Oberflacnenschicht der Platte 1 entzogen worden ist. Unter dem Druck der Prägewalze 14 verformt sicn die Deckschicht b dank dem genannten Gleitmittelzusatz plastisch-pastös, so dass keine Risse in dieser Schicht 6 entstehen können.The embossed decor becomes all the more precise - smaller radii of the convex edges thereof - the drier the top coat 6 is before it gets under the embossing roller 14. This coat of paint 6 must of course not be dust-dry. The embossing thus takes place in a semi-dry layer 6, from which the moisture has been removed by capillary forces in the top flake layer of the plate 1. Under the pressure of the embossing roller 14, the cover layer b deforms plastically and pasty thanks to the lubricant additive mentioned, so that no cracks can occur in this layer 6.

Die Konzentration des aufgeschlämmten Deckanstriches 6 muss so gross sein, dass im Gradienten der Kräfte - Kapillarkraft der trockenen Platte und Rückhaltevermögen des Anstriches 6 - gerade soviel Wasser in die Platte eingedrungen ist, wie nötig ist, um eine Erweichung im Bereich der Dekor-Tiefe zu erreichen und andererseits sowenig Wasser als möglich im Deckanstrich zurückbleibt. Es handelt somit nicht um ein Gleichgewicht im Gefüge Deckschicht 6 und Platte 1 und deswegen ist die Zeitspanne zwischen dem Auftrag der Deckschichtsuspension und dem Kontakt mit der Präqewalze 14 von ausschlaggenender Bedeutung. Hierbei können auch die Veranderung der Temperatur der Prägewalze 14 und der Geschwindigkeit des Förderers 10 zur Steuerung des Herstellungsprozesses ausgenützt werden. Die Temperatur des Prägezylinders 14 soll die Temperatur von 100 Grad C deutlich übersteigen.The concentration of the slurried top coat 6 must be so great that in the gradient of the forces - capillary force of the dry plate and retention capacity of the coat 6 - just as much water has penetrated the plate as is necessary to soften it in the area of the decor depth reach and, on the other hand, as little water as possible remains in the top coat. It is therefore not a question of an equilibrium in the structure of the top layer 6 and plate 1 and therefore the time period between the application of the top layer suspension and the contact with the embossing roller 14 is of crucial importance. The temperature of the embossing roller 14 can also be changed here and the speed of the conveyor 10 can be used to control the manufacturing process. The temperature of the embossing cylinder 14 should significantly exceed the temperature of 100 degrees C.

Das Verfahren zur Herstellung der beschrieoenen Platte zeichnet sich unter anderem dadurch aus. dass auf die Oberfläche des jeweiligen PlattenKernes 1 das Material der Deckschicht 6 in Form einer Aufschlämmung aufgetragen wird und dass die mit dieser Deckschicht 6 versehene Oberfläche 2 der Rohplatte 1 durch Prägung mit gewünschtem Dekor versehen wird. Die Feuchtigkeit der Aufschlämmung wird hierbei so gewänlt, dass die meiste Flüssigkeit aus der Aufschlämmung in das Material des Plattenkernes 1 übergeht, wobei der Rest der Flüssigkeit, welchen die Deckschicht 6 bis zur Prägung zurückbehält, 20% nicht übersteigt.The process for producing the labeled plate is characterized, among other things, by this. that on the surface of the respective plates Ernes K 1, the material of the covering layer 6 is applied in the form of a slurry and that the covering layer 6 provided with this surface 2 of the green sheet 1 by embossing with the desired decoration is provided. The moisture of the slurry is so chosen that most of the liquid from the slurry passes into the material of the plate core 1, the rest of the liquid, which the cover layer 6 retains until being embossed, not exceeding 20%.

Vor dem Auftragen der Deckschicht 6 können die Unebenheiten der Oberfläche des Plattenkernes 1, beispielsweise durch Schleifen, beseitigt werden, um eine überall gleich dicke Schicht auftragen zu können. Wenn erforderlich, so kann die Oberfläche auch so behandelt werden, dass sie überall diegleiche Saugfähigkeit besitzt. Dies erreicht man beispielsweise durch Abschaben einer Oberschicht der Rohplatte 1. Denn die die Oberfläche der Rohplatte 1 bildende Kruste besitzt einen höheren Feinanteil und sie ist deshalb verdichtet. Durch punktuelle Dichteunterschiede entstehen Bereiche der Plattenoberfläche mit mehr oder weniger guter Absorptionsfähigkeit. Die geschliffene Rohplatte weist solche Unterschiede in der Saugfähigkeit nicht auf und sie kann daher gleichmässig beschichtet werden.Before the top layer 6 is applied, the unevenness of the surface of the plate core 1 can be eliminated, for example by grinding, in order to be able to apply a layer of the same thickness everywhere. If necessary, the surface can also be treated so that it has the same absorbency everywhere. This is achieved, for example, by scraping off an upper layer of the raw plate 1. Because the crust forming the surface of the raw plate 1 has a higher fine fraction and it is therefore condensed. Specific density differences create areas of the plate surface with more or less good absorption capacity. The ground raw board does not have such differences in absorbency and can therefore be coated evenly.

Die der Einrichtung zugeführten Rohplatten Können noch feucht oder bereits staubtrocken sein. Bei einer bereits getrockneten Rohplatte, die mit einem Dekor versehen werden soll, muss die Uberflache derselben befeuchtet werden, aber nur so viel. dass die Flüssigkeit praktisch nur so tief in den PlattenKern 1 eindringt, wie in diesen geprägt werden soll. Erst hiernach wird die Oberflache des Plattenkernes 1 mit der Deckschicht 6 versehen. Das Mass der Befeuchtung einer solchen Platte kann durch die Konzentration der aufzutragenden Aufschlämmung oder/und durch ein Besprühen der Platte mit Wasser gesteuert werden.The raw panels fed to the facility can still be damp or already dry from dust. In the case of an already dried raw plate that is to be decorated, the surface of the same has to be moistened, but only as much. that the liquid penetrates practically only as deep into the plate core 1 as is to be embossed in it. Only then is the surface of the plate core 1 provided with the cover layer 6. The degree of moistening of such a plate can be controlled by the concentration of the slurry to be applied or / and by spraying the plate with water.

Die Oberflächentemperatur des Pragezylinders 14 muss so gewählt werden, dass ausreichend thermische Energie zur Verfügung steht, um, wegen dem Abbinden des Bindemittels, sowohl die mineralische Deckschicht 6 als auch die unmittelbar darunter liegende Schicht der Plattenmasse von Restfeuchtigkeit bzw. eingedrungenem Wasser zumindest teilweise zu trocknen. Dieser Vorgang muss ausreichend schnell erfolgen, damit der entweichende Wasserdampf zwischen der Walzenoberfläche 14 und der Mineralschicht 6 ein Dampfkissen ausbilden kann, welches ein Anbacken der Deckschicht 6 an die Walze 14 und dadurch ein Zerstören des Dekors beim Abrollen des Prägezylinders 14 verhindert.The surface temperature of the embossing cylinder 14 must be selected such that sufficient thermal energy is available to at least partially dry both the mineral cover layer 6 and the layer of the plate mass immediately below it from residual moisture or water that has penetrated because of the binding of the binder . This process must be carried out sufficiently quickly so that the escaping water vapor between the roller surface 14 and the mineral Layer 6 can form a steam cushion, which prevents the cover layer 6 from caking on the roller 14 and thereby prevents the decoration from being destroyed when the embossing cylinder 14 rolls off.

Während des Prägevorganges wird die mineralische Schicht 6 sowie eine etwa 2 mm tiefe Zone der Plattenoberfläche getrocknet. Diese Trocknung bewirkt die Erhärtung der dindemittel in der Deckschicht 6 und somit die Fixierung sowohl der Form des eingeprägten dreidimensionalen Dekors als auch der Form der Faserenden, welche diese Faserenden während des Präge Vorganges erhielten. Der Restwassergehalt des Plattenkernes 1 wird im Heisslufttrockenofen 16 entfernt, indem diese Feuchtigkeit durch die Deckschicht b aus der Platte entweicht. Die Komponenten der Deckschicht 6 müssen somit stets so gewählt werden, dass aucn die erhärtete Deckschicht 6 porös ist.During the embossing process, the mineral layer 6 and an approximately 2 mm deep zone of the plate surface are dried. This drying causes the hardening of the binder in the cover layer 6 and thus fixes both the shape of the embossed three-dimensional decor and the shape of the fiber ends which these fiber ends were given during the embossing process. The residual water content of the plate core 1 is removed in the hot air drying oven 16 by this moisture escaping from the plate through the cover layer b. The components of the cover layer 6 must therefore always be selected such that the hardened cover layer 6 is also porous.

Wurde man die Durchlaufgeschwindigkeit der Rohplatten 1 ernohen, so wäre der Warmeaustausch zwischen dem Prägezylinder 14 und der noch feuchten Abdeckschicht 6 zu klein, um während der zur Verfugung stehenden Kontaktzeit mit den Prägezylinder 14 ausreichend Wasser in der Deckschicht 6 bis zum Siedepunkt erhitzen zu können. Wenn eine Erhöhung der Durchlaufgeschwindigkeit nötig wäre, so müsste man die feuchte Schicht 6 durch die bereits genannte Heizquelle 17 vorwärmen, welche als ein Infrarot-Strahler, eine Heissluftquelle oder dgl. ausgeführt sein kann, bevor die SchiCht unter den Prägezylinder 14 gelangt.If the throughput speed of the raw plates 1 were increased, the heat exchange between the embossing cylinder 14 and the still moist cover layer 6 would be too small to be able to heat sufficient water in the cover layer 6 to the boiling point during the contact time available with the embossing cylinder 14. If an increase in the throughput speed were necessary, the moist layer 6 would have to be preheated by the aforementioned heating source 17, which is designed as an infrared radiator, a hot air source or the like can before the layer gets under the embossing cylinder 14.

Die Folgen von zu kurzer Reaktionszeit E sind offensicntich. namlich, ungenügende Erweichung des Fasermaterials und damit zu harte Plattenoberfläche, In die man den Dekor nicht zufriedenstellend einprägen kann. Eine zu lange Reaktionszeit bewirkt dagegen eine Auflösung des die Fasern bindenden Starkekleisters, welcher dann unter dem Druck der Pragewalze an die Plattenoberfläche dringt und dort Verfärbungen hervorruft.The consequences of too short a reaction time E are obvious. Namely, insufficient softening of the fiber material and thus too hard board surface, in which the decor cannot be impressed satisfactorily. A reaction time that is too long, on the other hand, causes the starch paste that binds the fibers to dissolve, which then penetrates to the surface of the plate under the pressure of the prague roller and causes discoloration there.

Bei herkömmlichen Prageverfahren, bei welchen die Platte nur mit Wasser vorbehandelt wird. stellt sich das Problem der Oberflacnenverfarbung nicht, da in jedem Fall ein Grund- und ein Deckanstricn aus einen nicht porosen Material auf die Ronplatte mit eingeprägten Dekor aufgebracht werden. Bei der Einhaltung der vorstehend genannten Verfahrensschritte und -parameter kann man einen besonderen okonomischen vorteil erreichen, nanlich, dass der Grundanstrich entfallen Kann. Ein weiterer Vorteil wird bei den eingesparten Energiekosten fur die TrocKnung erreicht.In conventional stamping processes, in which the plate is only pretreated with water. the problem of top surface coloring does not arise, since in any case a base and a top coat made of a non-porous material are applied to the Ron plate with embossed decor. If the above-mentioned process steps and parameters are observed, a particular economic advantage can be achieved, namely that the base coat can be omitted. A further advantage is achieved in the saved energy costs for drying.

Beispiel :

  • Eine trockene, stärkegebundene Ronplatte 1 mit einer Dichte von 0.3 g/cm3 wird nach dem bereits beschriebenen Verfahren nergestellt. Diese Rohplatte wird sodann plangeschliffen, wobei eine etwa 1 mm dicke Oberflächenschicht dabei abgetragen wird.
For example:
  • A dry, starch-bound Ron plate 1 with a density of 0.3 g / cm 3 is produced according to the method already described. This raw plate is then ground flat, one about 1 mm thick surface layer is removed.

Die zur Beschichtung der Rohplatte 1 bestimmte Masse 6 besteht aus einer feindispersen wässrigen Aufschlämmung mit 50 Gew % Feststoffanteil. Davon machen hohe Plastizität aufweisender Kaolin 35 % und Kalziumkarbonat 12 %, wobei etwa 50 % der Körner von Kalziumkarbonat kleiner als 10 mü sind. Daneben werden 3 Gew % Bindemittel in Form von Stärkekleister beigegeben. Als Hilfsmittel wird ein Emulgator zugesetzt, und zwar etwa 3 g Hexametaphosphat pro Liter Aufschlammung.The mass 6 intended for coating the raw plate 1 consists of a finely dispersed aqueous slurry with a solids content of 50% by weight. Of this, high plasticity makes kaolin 35% and calcium carbonate 12%, with about 50% of the grains of calcium carbonate being smaller than 10 m. In addition, 3% by weight of binder is added in the form of starch paste. An emulsifier is added as an aid, namely about 3 g of hexametaphosphate per liter of slurry.

Diese Masse wird mittels der Walzen 12 und 13 wahrend eines einmaligen Durchlaufs unter diesen auf die Rohplatte 1 aufaetragen. Die Menge der auf die Rohplatten 1 aufgetragenen Aufschlämmung ist so gewählt, dass 150 - 250 g über 1 m2 verteilt wird. Besonders vorteilhaft erwies sich die Menge von 200 g. Die für die gegenseitige Wechselwirkung zwischen dem Material der Rohplatte 1 und dem Material der Aufschlämmung 6 notwendige Reaktionszeit beträgt in der Regel 10 sec. Während dieser Zeitspanne verliert die Aufschlämmung etwa 50 Gew % ihres Wassergehaltes, welcher unter dem Einfluss von Gravitation und Kapilarkräften in die Rohplatte eindringt. Dies verursacht erstens eine physikalische Vortrocknung der Deckschicht 6. In der Rohplatte 1 bewirkt das eingedrungene Wasser die Erweichung des Stärkebinders.This mass is applied to the raw plate 1 by means of the rollers 12 and 13 during a single pass under them. The amount of slurry applied to the raw slabs 1 is selected so that 150-250 g is distributed over 1 m2. The amount of 200 g proved to be particularly advantageous. The reaction time required for the mutual interaction between the material of the raw plate 1 and the material of the slurry 6 is generally 10 seconds. During this period, the slurry loses about 50% by weight of its water content, which in the raw plate under the influence of gravitation and capillary forces penetrates. First of all, this causes the outer layer 6 to be physically predried. In the raw plate 1, the water which has penetrated causes the starch binder to soften.

Der so vorbehandelte Plattenkern 1 durchläuft die Prägestation 14, 15 mit einer Geschwindigkeit, die mindestens 12 m/min betragt. Im Umluftofen 16 entweicht die Feuchtigkeit, welche sich im Inneren der Platte befindet. Das dreidimensionale Muster auf der Pragewalze 14 kann aucn Abschnitte aufweisen, welche Kanten im Plattendekor mit einem Radius zwischen 0.3 bis 2 mm bilden sollen. Solche Kanten sind mit Hilfe des beschriebenen Verfahrens ohne weiteres zu erreichen.The plate core 1 pretreated in this way passes through the stamping station 14, 15 at a speed which is at least 12 m / min. In the convection oven 16, the moisture that is inside the plate escapes. The three-dimensional pattern on the embossing roller 14 can also have sections which should form edges in the plate decor with a radius between 0.3 to 2 mm. Such edges can be easily reached using the described method.

Im Gegensatz zu den herkömmlichen, heissgepragten Platten be-sitzen die Platten, welche nacn dem vorstehend bescnriebenen verfahren hergestellt wurden, eine makroskopisch homogene Oberflache, welche Prägungen von grosser Feinheit erlaubt, insbesondere mit Krümmungsradien unter 0,5 mm.In contrast to the conventional plates heissgepragten b e-sitting the plates which NaCN bescnriebenen the above process were prepared, a macroscopically homogeneous surface, which allows embossing of great fineness, in particular mm with radii of curvature less than 0.5.

Sämtliche Merkmale des vorstenend beschriebenen Gegenstandes können unter Umständen als erfindungswesentlich betrachtet werden.Under certain circumstances, all features of the object described above can be regarded as essential to the invention.

Claims (9)

1. Platte, deren Kern Mineralfasern enthält und deren eine Oberfläche einen dreidimensionalen Dekor aufweist, dadurch gekennzeichnet, dass sowohl die Wände (3.7) der Vertiefungen (4), welche den Dekor bilden, als auch die zwischen diesen liegenden Abschnitte der Oberfläche (2) des Plattenkernes (1) mit einer Deckschicht (6) versehen sind und dass die Dicke (D) dieser Deckschicht (6) kleiner ist als die Tiefe (T) der Vertiefungen (4).1. plate, the core of which contains mineral fibers and one surface of which has a three-dimensional decor, characterized in that both the walls (3.7) of the depressions (4) which form the decor and the sections of the surface (2) lying between them of the plate core (1) are provided with a cover layer (6) and that the thickness (D) of this cover layer (6) is smaller than the depth (T) of the depressions ( 4 ). 2. Platte nach Anspruch 1, dadurch gekennzeichnet, dass das Material der Deckschicht (6) ein Bindemittel enthält, weiches derart ist, dass die DecKschIcht (6) formstabil und zugleich auch feuchtigkeitsdurchlässig ist und dass das Material dieser Deckschicht von MIneralfasern frei ist.2. Plate according to claim 1, characterized in that the material of the cover layer (6) contains a binder which is such that the cover layer (6) is dimensionally stable and at the same time also permeable to moisture and that the material of this cover layer is free of mineral fibers. 3. Platte nach Anspruch 2, dadurch gekennzeichnet, dass die Deckschicht (o) ferner wenigstens eines der Schichtsilikate wie z.B. Kaolin oder/und Glimmer, in fein verteilter Form enthält.3. Plate according to claim 2, characterized in that the covering layer (o) further comprises at least one of the layer silicates such as e.g. Contains kaolin and / or mica in finely divided form. 4. Platte nach Anspruch 2, dadurch gekennzeichnet, dass die Deckschicht (6) ferner Füllstoffe, wie z.B. Kalziumkarbonat und/oder Perlit sowie Bindemittel, wie z.B. Starke, enthält.4. Plate according to claim 2, characterized in that the cover layer (6) further fillers, such as calcium carbonate and / or pearlite and binders such as starch. 5. Verfahren zur Herstellung der Platte nach Anspruch 1, dadurch gekennzeichnet, dass auf die Oberfläche des Plattenkernes (1) das Material der Deckschicht (6) in Form einer Aufschlämmung aufgetragen wird und dass die mit dieser Deckschicht (6) versehene Ooerfläche der Rohplatte (1) durch Prägung mit gewünschtem Dekor versehen wird.5. A process for producing the plate according to claim 1, characterized in that the material of the cover layer (6) is applied in the form of a slurry to the surface of the plate core (1) and that the outer surface of the raw plate provided with this cover layer (6) 1) is embossed with the desired decor. 6. Verfahren nach Ansorucn 5. dadurch gekennzeichnet, dass vor dem Auftragen der DecKschicht (6) die Unebenheiten der uberflache des Plattenkernes (1). beispielsweise durcn Schleifen, beseitigt werden.6. The method according to Ansorucn 5. characterized in that before the application of the cover layer (6) the unevenness of the surface of the plate core (1). for example by grinding. 1. Verfahren nach Anspruch 5. daaurch gekennzeichnet, dass die Feuchtigkeit der Aufschlämmung so gewählt wird, dass die meiste Flussigkeit aus der Aufschiammung in das Material des Plattenkernes (1) übergeht, wobei der Rest der Flüssigkeit, welchen die Deckschicht (6) bis zur Prägung zurückbehält. 20% nicht übersteigt.1. The method according to claim 5, characterized in that the moisture of the slurry is selected so that most of the liquid passes from the slurry into the material of the plate core (1), the rest of the liquid, which the cover layer (6) to Embossing retained. Does not exceed 20%. d. Verfahren nach Anspruch 5, in dem eine bereits getrocknete Rohplatte mit einem DeKor versehen werden soll, dadurch gekennzeichnet, dass die Rohplatte (1) befeuchtet wird, und zwar nur so viel, dass die Flüssigkeit praktisch so tief in den Plattenkern (1) eindringt, wie in diesen geprägt wird, dass die Uberfläche des Plattenkernes (1) mit der Deckschicht versehen wird und dass hiernach der Dekor hergestellt wird.d. Method according to claim 5, in which an already dried raw plate is to be provided with a decor, characterized in that the raw plate (1) is moistened, and only so much that the liquid is practically so deep in the plates core (1) penetrates, as is embossed therein, that the surface of the plate core (1) is provided with the cover layer and that the decor is then produced. 9. Einrichtung zur Durchführung des Verfahrens nach Anspruch 5. dadurch gekennzeichnet, dass sie eine Vorrichtung (11;12,13) zum Auftragen der Deckschicht (6) auf den jeweiligen Plattenkern (1) aufweist, dass auf diese Vorricntung eine Vorrichtung zur dildung des Dekors in der beschichteten Rohplatte (1) folgt und dass dieser Vorrichtung (14) eine Trocknungsvorrichtung (1b) nachgescnaltet ist.9. Device for carrying out the method according to claim 5, characterized in that it has a device (11; 12, 13) for applying the cover layer (6) to the respective plate core (1), that a device for forming the Decorations in the coated raw plate (1) follow and that this device (14) is followed by a drying device (1b).
EP86114343A 1985-11-28 1986-10-16 Panel having a core of mineral fibres, and method and apparatus for manufacturing said panel Withdrawn EP0224009A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH507685A CH667685A5 (en) 1985-11-28 1985-11-28 PLATE WHOSE CORE CONTAINS MINERAL FIBERS, AND METHOD AND DEVICE FOR PRODUCING THE SAME.
CH5076/85 1985-11-28

Publications (1)

Publication Number Publication Date
EP0224009A1 true EP0224009A1 (en) 1987-06-03

Family

ID=4287540

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86114343A Withdrawn EP0224009A1 (en) 1985-11-28 1986-10-16 Panel having a core of mineral fibres, and method and apparatus for manufacturing said panel

Country Status (2)

Country Link
EP (1) EP0224009A1 (en)
CH (1) CH667685A5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1318246A1 (en) * 2001-12-10 2003-06-11 Martin Borkowski Surface finished insulating panel made of natural fibres and its method of manufacture

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB978119A (en) * 1961-08-11 1964-12-16 Owens Corning Fiberglass Corp Film-faced body and method of making same
DE2113776A1 (en) * 1970-03-23 1971-10-21 Armstrong Cork Co Acoustic ceiling or wall panels and processes and devices for their production
FR2401285A1 (en) * 1977-08-23 1979-03-23 Ishikawa Takashi ARCHITECTURAL PANEL AND ITS MANUFACTURING METHODS
DE3343017A1 (en) * 1983-11-28 1985-06-05 Rolf 8183 Rottach-Egern Egenberger Process for producing a non-combustible multi-layer composite body

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB978119A (en) * 1961-08-11 1964-12-16 Owens Corning Fiberglass Corp Film-faced body and method of making same
DE2113776A1 (en) * 1970-03-23 1971-10-21 Armstrong Cork Co Acoustic ceiling or wall panels and processes and devices for their production
FR2401285A1 (en) * 1977-08-23 1979-03-23 Ishikawa Takashi ARCHITECTURAL PANEL AND ITS MANUFACTURING METHODS
DE3343017A1 (en) * 1983-11-28 1985-06-05 Rolf 8183 Rottach-Egern Egenberger Process for producing a non-combustible multi-layer composite body

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1318246A1 (en) * 2001-12-10 2003-06-11 Martin Borkowski Surface finished insulating panel made of natural fibres and its method of manufacture

Also Published As

Publication number Publication date
CH667685A5 (en) 1988-10-31

Similar Documents

Publication Publication Date Title
DE1778924C3 (en) Method for producing a synthetic resin sheet with a surface having an embossed pattern
DE3248663C1 (en) Coated facade or roof insulation board made of mineral fibers, as well as processes for their production
DE2656473A1 (en) NON-COMBUSTIBLE AND SMOKELESS CONSTRUCTION MATERIAL AND METHOD FOR MANUFACTURING IT
DE2940512A1 (en) METHOD FOR PRODUCING AN OBJECT WITH A DECOR
DE20317527U1 (en) Laminated floorboard has a decorative overlay and color product components inserted into recesses which, together, give a variety of visual wood effects
DE2419962A1 (en) A PROCESS FOR THE PRODUCTION OF A BASE-COMPOSED TOPPING AND TOPPING BY THIS PROCESS
EP0741003B1 (en) Fire protection element with layered structure, particularly as insert for fireproof doors and semi-product for use in the element
DE1794235A1 (en) Embossing sheet and process for its manufacture
DE2753651A1 (en) COMPOSITE MATERIAL
DE1504351C3 (en) Process for the production of a composite body consisting of webs lying one on top of the other
DE102008008240B4 (en) Method for producing a building board, device for carrying out the method and floor panel
DE1471256C3 (en) Process for the production of sound-absorbing self-supporting ceiling and wall panels from a mat or a fleece made of mineral wool
EP0224009A1 (en) Panel having a core of mineral fibres, and method and apparatus for manufacturing said panel
DE2833066C2 (en) Transfer material, process for its manufacture and decorative material made therefrom
EP2847258A1 (en) Process for producing a decorated sheet and use thereof
DE2234068A1 (en) A PROCESS FOR THE PRODUCTION OF OBJECTS PROVIDED WITH PROFILED PATTERNS ON THE SURFACE, FOR EXAMPLE PANELS OR PLATES, FROM DEFORMABLE MATERIAL IN THE WAY OF ROCKING AND DEVICE TO PERFORM THE PROCESS
DE3606199A1 (en) Substrate adhesive cladding - uses an intermediate carrier with partial drying
DE60018352T2 (en) Method and device for producing ceramic articles
DE2542749A1 (en) PROCESS FOR DECORATING PRODUCTS AND PRODUCTS MANUFACTURED WITH THEM
DE2061105B2 (en) Process for the production of ceramic veneers
CH614666A5 (en) Process for embossing an artificially produced board
DE102016109794B4 (en) Method for processing an artificial stone slab
CH626314A5 (en) Ceramic veneer
AT356568B (en) METHOD FOR PRODUCING A PARTICULAR PANEL-SHAPED LIGHTWEIGHT MATERIAL
DE2421576A1 (en) PROCESS FOR MANUFACTURING PATTERNED HARD WOOD FIBER PANELS

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE FR GB IT LI NL

17P Request for examination filed

Effective date: 19871002

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ARMSTRONG WORLD INDUSTRIES, INC.

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

17Q First examination report despatched

Effective date: 19890605

18W Application withdrawn

Withdrawal date: 19890627

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KALBSKOPF, REINHARD