EP1858681B1 - Procede de production de plaques de platre revetues - Google Patents

Procede de production de plaques de platre revetues Download PDF

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Publication number
EP1858681B1
EP1858681B1 EP06725118.1A EP06725118A EP1858681B1 EP 1858681 B1 EP1858681 B1 EP 1858681B1 EP 06725118 A EP06725118 A EP 06725118A EP 1858681 B1 EP1858681 B1 EP 1858681B1
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EP
European Patent Office
Prior art keywords
coating
plasterboard
process according
drying
spraying
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.)
Active
Application number
EP06725118.1A
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German (de)
English (en)
Other versions
EP1858681A2 (fr
Inventor
Jürgen MARTIN
Gosbert Grebner
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.)
Knauf Gips KG
Original Assignee
Knauf Gips KG
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 Knauf Gips KG filed Critical Knauf Gips KG
Priority to PL06725118T priority Critical patent/PL1858681T3/pl
Priority to EP06725118.1A priority patent/EP1858681B1/fr
Publication of EP1858681A2 publication Critical patent/EP1858681A2/fr
Application granted granted Critical
Publication of EP1858681B1 publication Critical patent/EP1858681B1/fr
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Classifications

    • 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
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
    • B28B19/0092—Machines or methods for applying the material to surfaces to form a permanent layer thereon to webs, sheets or the like, e.g. of paper, cardboard
    • 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
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/04—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers
    • 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
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening

Definitions

  • the present invention relates to a process for producing coated plasterboard.
  • gypsum boards Construction boards based on gypsum, hereinafter referred to as gypsum boards, are used in dry construction for the production of floors, walls and ceilings.
  • the corresponding plates are manufactured industrially.
  • stucco In gypsum plasterboard, stucco is typically mixed with water and various additives into a slurry and then poured onto a board web. Then a second board web is placed so that the plaster is enclosed before the setting of the two board webs. The strand is then passed over a binding band. During the time required for this, the stucco in the plate core binds to calcium sulfate dihydrate. The hardened strand is separated into plates by a suitable cutting device. This is followed by a drying process in which the excess water is removed.
  • cardboard it is also possible to use alternative products for cladding, such as glass fiber webs or textile nonwovens.
  • gypsum fiberboards which are typically made from gypsum and cellulosic fibers.
  • stucco and cellulose fibers are intimately mixed. Water is added to this mixture, which is sufficient for setting the stucco plaster. This so-called green plate is then pressed under pressure. After setting on the Abbindestrange and singling the plates are dried.
  • Corresponding gypsum fiber boards are characterized in particular by their high mechanical strength.
  • the joints between the plates are usually filled, the resulting walls or ceilings primed and painted or papered. Paint or wallpapering is used as a decoration designated. Often before primers or wallpaper changes are applied.
  • the edges of the plates are usually pre-primed manually.
  • EP 1 076 137 A2 relates to a lining paper, which receives a decorative surface design by printing and is then used to produce a plasterboard.
  • US 2003/0113572 describes a specific coating composition for a gypsum board containing a binder, soy protein and two or more Pigments. Although it is generally described in this document that the coating can take place before or after the stayer dryer and thus discloses the features of the preamble of claim 1, it is preferred that the coating composition is applied before the stayer dryer. Investigations of the mass described there have shown that it has drying times of well over 10 minutes and only dries well when used in front of the floor dryer.
  • WO 99/10151 relates to a material for the production of inorganic phosphate-based materials. It is described there on page 7 that a corresponding method for plasterboard is not applicable.
  • the present invention has the object to develop a method by which the disadvantages of the prior art can be overcome.
  • a coating in the sense of this application comprises both the application of primers and of means for decoration, such as colors.
  • Gypsum boards are dried in a continuous production process and, after passing through the drying station, trimmed, stacked and packed and / or provided with a strapping as transport security. Unstacking already stacked plates to further process them is generally a cumbersome process that would reduce the production capacity of such equipment.
  • the step of coating the gypsum boards is included in the manufacturing process and immediately follows the drying process.
  • the still warm plate is sprayed with a coating agent.
  • the residual heat of the plate surprisingly accelerates the drying of the coating agent so much that the coating agent is dried sufficiently until the step of stacking the gypsum boards to prevent sticking of the stacked plates together.
  • the step of forming the gypsum board includes the steps necessary to make the gypsum board until it enters the dryer. Herein may be included steps relating to setting or singulation.
  • the gypsum board takes place between the drying of the gypsum board and the coating no stacking or transfer to another workstation, but the drying is followed directly by the coating. Subsequently, the gypsum board is stacked with other plates to form a plasterboard stack.
  • the inventive method is suitable for both plasterboard and gypsum fiber boards.
  • the spray areas can overlap.
  • several plates are made in parallel and run together from the drying device at the same time. These are then coated simultaneously by a correspondingly larger number of spray nozzles.
  • Particularly suitable spray nozzles are wide jet spray nozzles.
  • airless spray systems Drucksprühsysteme
  • the nozzles do not spray on the plate surface at 90 °, but slightly obliquely on the plate surface, the nozzles being arranged to spray with or against the transport direction of the plates.
  • the angle between the spray direction of the nozzles and the disk surface is 20 to 80 °, more preferably 30 to 60 °.
  • Typical distances are in the range of 10 to 60 cm, more preferably in the range of 20 to 40 cm.
  • the coating composition preferably has a water content in order to avoid emissions due to evaporating solvents, etc.
  • Preferred water contents are at least 30% by weight, more preferably at least 40% by weight and even more preferred water contents are at least 80% by weight or at least 95% by weight, in particular in primers.
  • an application of coating material in an amount of 20 to 100 g / m 2 (based on the dry weight of the coating agent).
  • the coating step there is only a short period of time between the end of the drying step and the stacking of the gypsum boards, which includes the coating step according to the invention.
  • the said time is the time after which the coated side of the produced coated gypsum board makes contact with another surface, typically by depositing another gypsum board on it during stacking.
  • the applicable coating compositions are diverse. It can be used e.g. water-repellent coating agents, water-barrier coating agents, wallpaper replacement primer, paints, impregnating agents, anti-slipping agents, liquid films and / or strength-increasing agents.
  • gypsum board has a Cobb value of about 100 to 200 g / m 2 for a two-hour exposure according to ASTM C473-87a. Further preferred values are in the range of 130 to 160 g / m 2 . Since the gypsum core is already dried at the time of coating, it is irrelevant whether the coating used hampers the water leaving the surface. It is therefore also possible to use monomers for the coating, which subsequently polymerize. Even agents that solidify the surface, such as one-component resins, can be used.
  • a further drying step is provided to accelerate the drying.
  • a drying by infrared radiation, hot air or the like can be used.
  • the plates thus obtained can - as in the usual way - be further processed, for example by punching, bending, slitting or trimming.
  • This subsequent processing step may also be integrated into the manufacturing process and performed prior to stacking the gypsum boards. However, it is also possible to spend the plates after stacking to another station and to do there further steps. Of course, it is also possible to integrate part of the post-processing into the production process and to carry out further post-processing later. Typical post-processing steps serve for the production of chamfer edges, step seam edges, etc.
  • the gypsum boards are coated on at least one edge.
  • coating composition is applied to this edge region.
  • the joint strength is increased.
  • Corresponding processing can be connected directly to the processing of the edge by means of bundler or milling devices.
  • a treatment step may follow, in which edges of the stacked Plaster boards are coated by spraying with a coating material, in particular by a primer. Also, this can increase the edge strength.
  • the gypsum boards are advantageously used together with a putty compound to joint the joints formed between the boards, which has an identical color as the coating, so that even after grouting the boards a uniform appearance of the walls is achieved.
  • the coating is synchronized with the transport of the plates, i.
  • the spraying is interrupted as soon as one plate leaves the spraying area and resets when the next plate reaches the spraying device.
  • a deflection device is preferably provided.
  • deflecting the conveying element is arranged or deflected in the coating area at a distance from the gypsum board.
  • This has the advantage that the risk of contamination of the conveying elements or of the conveyor belt is considerably reduced.
  • the device is preferably further developed as described above with reference to the method according to the invention.
  • a drying device 10 which is a multi-tray dryer in the illustrated embodiment, a plurality of gypsum boards 12 are arranged.
  • a conveyor 14 which is adjustable in height, for example via a hydraulic 16 in the direction of an arrow 18, the gypsum boards 12 are removed from the drying device 10 and transported via a second conveyor 20 to a stacking device, not shown, are stacked by the plasterboard 12, for example, on pallets.
  • a coating device 22 is provided in the region of the pivotable conveyor 14.
  • the coating device 22 has spray nozzles 26 arranged transversely to a transport direction 24. With the aid of the spray nozzles 26, the gypsum boards 12 are coated while being transported by the conveyor 14 in the conveying direction 24.
  • a plurality of drying devices can be arranged next to one another, so that a plurality of gypsum boards can be transported side by side at the same time by the conveying device 14 and coated simultaneously by correspondingly provided spray nozzles.
  • the coating device 22 is in the first preferred embodiment ( FIG. 1 ) pivotable together with the conveying device 14, so that the distance between the spray nozzles 26 and the gypsum plates 12, regardless of the position of the conveyor 14 remains constant.
  • the coating device 22 is not provided in the region of the pivotable conveyor 14, but in the region of the adjoining conveyor 20. This has the advantage that a pivoting of the coating device together with the conveyor 14 is not required.
  • a deflection device 28 (FIG. FIG. 3 ) be provided in the area of the coating device 22 .
  • the deflection direction has four deflection rollers 30, so that a conveying element 32, such as a conveying path, has a distance to the plasterboard 12 in a coating region 34.
  • a receiving device 36 For collecting excess coating material is preferably between the gypsum board 12 and the conveying element 32nd in the coating area 34, a receiving device 36, such as a tub provided.
  • a gypsum board was conventionally made on a line where a gypsum slurry is continuously applied to a board web and covered with a second board web. After the setting of the gypsum core, the plates are separated and transferred to a floor dryer. After drying, a coating was carried out with a device according to FIG. 2 , in which two wide-jet nozzles were used.
  • the coating agent used was a water-based paint containing inorganic pigments, binders, emulsifiers and other stabilizers and stabilizers. The order was 65 g / m 2 . Due to the residual heat of the plates, the coating composition dried within 20 seconds so far that the coated plates could be stacked directly on one another with a conventional device.
  • Example 2 The procedure was as in Example 1, but after removal from the dryer and the coating two adjacent edges of the gypsum boards were chamfered and then stacked the plates.
  • the gypsum board stack was subjected to a further coating step at a further station where the edges were coated.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Panels For Use In Building Construction (AREA)

Claims (12)

  1. Procédé de fabrication d'une plaque de plâtre revêtue, comprenant, dans une phase de travail, les étapes suivantes dans l'ordre suivant :
    a) formage d'une plaque de plâtre ;
    b) séchage de la plaque de plâtre dans un dispositif de séchage ;
    c) revêtement de la plaque de plâtre par pulvérisation avec un agent de revêtement à la suite du séchage ;
    d) empilage des plaques de plâtre, caractérisé en ce que,
    entre la fin du revêtement et l'empilage des panneaux de plâtre, il s'écoule une période inférieure à 60 secondes, le séchage de l'agent de revêtement s'effectuant à l'aide de la chaleur résiduelle de la plaque.
  2. Procédé selon la revendication 1, caractérisé en ce que la plaque de plâtre est une plaque de plâtre cartonné ou une plaque de fibres de plâtre.
  3. Procédé selon une des revendications 1 ou 2, caractérisé en ce que la pulvérisation s'effectue à l'aide d'une ou de plusieurs buses de pulvérisation, de préférence de buses de pulvérisation à large jet.
  4. Procédé selon une des revendications 1 à 3, caractérisé en ce que l'angle entre la direction de pulvérisation et la surface de plaque est compris entre 20 et 80°.
  5. Procédé selon une des revendications 1 à 4, caractérisé en ce que l'agent de revêtement présente une teneur en eau d'au moins 30 %-poids.
  6. Procédé selon une des revendications 1 à 5, caractérisé en ce que, entre la fin du revêtement et l'empilage des panneaux de plâtre, il s'écoule une période inférieure à 40 secondes.
  7. Procédé selon une des revendications 1 à 6, caractérisé en ce que la plaque de plâtre est ensuite soumise à un traitement complémentaire, par exemple par perçage, cintrage, rainurage ou rognage.
  8. Procédé selon au moins une des revendications 1 à 7, caractérisé en ce que l'agent de revêtement est sélectionné parmi des agents de revêtement repoussant l'eau, des agents de revêtement bloquant l'eau, une couche de fond pour changement de papier peint, des peintures, des agents d'imprégnation, des agents antidérapants, des feuilles liquides, des agents renforçant la résistance, des bactéricides et des fongicides.
  9. Procédé selon une des revendications 1 à 8, caractérisé en ce que, dans l'étape c), seule une zone partielle de la plaque de plâtre est revêtue.
  10. Procédé selon la revendication 9, caractérisé en ce que la zone partielle comprend une ou plusieurs arêtes de la plaque de plâtre.
  11. Procédé selon une des revendications 1 à 10, caractérisé en ce que la plaque de plâtre est en plus revêtue sur au moins une arête par une pulvérisation avec un agent de revêtement.
  12. Procédé selon une des revendications 1 à 11, caractérisé en ce que, après l'empilage, au moins une arête des plaques de plâtre empilées est revêtue par une pulvérisation avec un agent de revêtement.
EP06725118.1A 2005-03-17 2006-03-17 Procede de production de plaques de platre revetues Active EP1858681B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL06725118T PL1858681T3 (pl) 2005-03-17 2006-03-17 Sposób produkcji powlekanych płyt gipsowych
EP06725118.1A EP1858681B1 (fr) 2005-03-17 2006-03-17 Procede de production de plaques de platre revetues

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP05102105 2005-03-17
EP06725118.1A EP1858681B1 (fr) 2005-03-17 2006-03-17 Procede de production de plaques de platre revetues
PCT/EP2006/060815 WO2006097520A2 (fr) 2005-03-17 2006-03-17 Procede et dispositif de production de plaques de platre revetues

Publications (2)

Publication Number Publication Date
EP1858681A2 EP1858681A2 (fr) 2007-11-28
EP1858681B1 true EP1858681B1 (fr) 2014-05-07

Family

ID=34939002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06725118.1A Active EP1858681B1 (fr) 2005-03-17 2006-03-17 Procede de production de plaques de platre revetues

Country Status (5)

Country Link
US (1) US20090074977A1 (fr)
EP (1) EP1858681B1 (fr)
ES (1) ES2470376T3 (fr)
PL (1) PL1858681T3 (fr)
WO (1) WO2006097520A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111761702A (zh) * 2020-07-08 2020-10-13 安庆米锐智能科技有限公司 一种空心砖成型处理设备及成型处理工艺
DE102020003304A1 (de) 2020-06-02 2021-12-02 Klaus Obermeier Trocknungsvorrichtung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HUE037124T2 (hu) * 2013-06-26 2018-08-28 Knauf Gips Kg Gipszkarton lemezt elõállító berendezés és eljárás gipszkarton lemez elõállítására
JP7382723B2 (ja) * 2013-10-07 2023-11-17 クナウフ ギプス カーゲー 石膏プラスターボードを生産するための方法
EA034501B1 (ru) * 2013-10-07 2020-02-13 Кнауф Гипс Кг Способ изготовления гипсовой штукатурной плиты

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB973492A (en) * 1959-12-04 1964-10-28 Gasway Corp Method and apparatus for painting
US4988543A (en) * 1989-09-25 1991-01-29 Ecole Polytechnique Process for incorporation of a phase change material into gypsum wallboards and other aggregate construction panels
WO2006004615A1 (fr) * 2004-06-29 2006-01-12 Princeton Technology Partners, L.L.C. Procede de production d'un panneau revetu

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4572864A (en) * 1985-01-04 1986-02-25 The United States Of America As Represented By The United States Department Of Energy Composite materials for thermal energy storage
AT408346B (de) * 1997-08-22 2001-10-25 Gerhard Melcher Verfahren zur herstellung von überwiegend anorganischen schäumen auf ortsfesten anlagen und dafür benötigte anlagen
US6066201A (en) * 1998-11-09 2000-05-23 Ergon, Inc. Thixotropic wax emulsion compositions
US20020071954A1 (en) * 2000-12-08 2002-06-13 Nelson Christopher R. Cellulose gypsum based substrate with increased water resistance and strength by surface application of polymeric diphenylmethane diisocyanate
US6663979B2 (en) * 2001-12-19 2003-12-16 United States Gypsum Company Coating for gypsum board face with uniform gloss intensity

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB973492A (en) * 1959-12-04 1964-10-28 Gasway Corp Method and apparatus for painting
US4988543A (en) * 1989-09-25 1991-01-29 Ecole Polytechnique Process for incorporation of a phase change material into gypsum wallboards and other aggregate construction panels
WO2006004615A1 (fr) * 2004-06-29 2006-01-12 Princeton Technology Partners, L.L.C. Procede de production d'un panneau revetu

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020003304A1 (de) 2020-06-02 2021-12-02 Klaus Obermeier Trocknungsvorrichtung
DE102020003304B4 (de) 2020-06-02 2022-06-23 Klaus Obermeier Trocknungsvorrichtung
CN111761702A (zh) * 2020-07-08 2020-10-13 安庆米锐智能科技有限公司 一种空心砖成型处理设备及成型处理工艺

Also Published As

Publication number Publication date
WO2006097520A2 (fr) 2006-09-21
PL1858681T3 (pl) 2014-09-30
WO2006097520A3 (fr) 2007-01-18
EP1858681A2 (fr) 2007-11-28
US20090074977A1 (en) 2009-03-19
ES2470376T3 (es) 2014-06-23

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