EP1319484A1 - Verfahren und Anlage zum Beschichten von Paneeloberflächen mit Melaminharz- oder Phenolharz-Papier - Google Patents

Verfahren und Anlage zum Beschichten von Paneeloberflächen mit Melaminharz- oder Phenolharz-Papier Download PDF

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Publication number
EP1319484A1
EP1319484A1 EP02027041A EP02027041A EP1319484A1 EP 1319484 A1 EP1319484 A1 EP 1319484A1 EP 02027041 A EP02027041 A EP 02027041A EP 02027041 A EP02027041 A EP 02027041A EP 1319484 A1 EP1319484 A1 EP 1319484A1
Authority
EP
European Patent Office
Prior art keywords
pack
plates
cooled
press
temperature
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Withdrawn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
EP02027041A
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English (en)
French (fr)
Inventor
Giorgio Pagnoni
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.)
PAGNONI IMPIANTI SpA
Original Assignee
PAGNONI IMPIANTI SpA
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 PAGNONI IMPIANTI SpA filed Critical PAGNONI IMPIANTI SpA
Publication of EP1319484A1 publication Critical patent/EP1319484A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
    • B27N7/005—Coating boards, e.g. with a finishing or decorating layer

Definitions

  • the present invention relates to a method and a plant for facing wood-based panel surfaces (chipboards, MDF, multilayered sheets) with melaminic or phenolic paper sheets.
  • the plants for facing panel surfaces with melaminic or phenolic paper sheets generally consist of hot-plate presses between which the paper/panel/paper sandwich is tightened and simultaneously submitted to the action exerted by pressure and temperature, so as to fluidise the resins (of the thermosetting type) and polymerise them on reaching of a given temperature (on the order of 150-180°C).
  • Cooling unevennesses create stresses inside the panel that, on subsequent unpiling, cause deformation of the panel itself.
  • cooling devices of the so-called book-shaped or star-shaped type, depending on their construction
  • These cooling devices can also contemplate an exposure to a forced air stream to improve yield, but in this case there is the risk that the air stream may preferably only impinge on some regions of the panels thereby just causing those deformations that are wished to be avoided.
  • Parquet is usually made up of strips of solid and valuable wood which is therefore very expensive.
  • the "artificial or false parquet" is obtained from high-density MDF or chipboard panels surface-faced with paper sheets reproducing the pattern of the true parquet strips.
  • the necessary hardness and resistance to abrasion In order to give the surface of the faced panels the necessary hardness and resistance to abrasion however, not only one paper sheet but a pack of 2-3 paper sheets are superposed on the panel, the uppermost paper sheet being transparent (to show the sheet under it carrying the wood pattern) and charged with particular and very strong resins.
  • floor panels as they are relatively thin (6-8 mm), are more subjected to deformation and their surfaces are faced with different types of paper sheets on the two faces (since the lower face is never in sight) and therefore, surface stresses are asymmetric.
  • These panels due to their final use, must not be absolutely subjected to deformation over time, i.e. after installation of same with the final user, because this fact would cause a very serious damage to the producer's image.
  • a method for quick facing surfaces of wood-based panels with melaminic or phenolic paper sheets, comprising the steps of pressing a pack formed of one wood-based panel and one or more of said paper sheets to a first pressure by a press heated to a first preset temperature and then causing passage of the pack through a contact-cooling unit comprising faced plates that are cooled to a second preset temperature and can be closed towards each other to come into contact with the opposite faces of the pack after the latter comes out of the hot press, the first temperature being included between 150 and 210°C, the second temperature being included between 20 and 60°C, and the first pressure being in the range of 20 to 40 kg/cm 2 .
  • a plant has been conceived for quick facing surfaces of wood-based panels with melaminic or phenolic resins, comprising a press heated to a first preset temperature for hot-pressing, and a sequential contact-cooling unit, the press being operated for hot pressing to a first pressure of a pack formed of a wood-based panel and one or more of said paper sheets, the cooling unit comprising superposed faced plates that are cooled to a second preset temperature and can be closed towards each other to come into contact with the opposite faces of the pack after the pack comes out of the hot press, the cooling unit comprising suction means for the fumes given off from the pack disposed between the cooled plates, at least before closure of said cooled plates.
  • Fig. 1 diagrammatically shown in Fig. 1 is a plant (generally identified by 10) for quick facing surfaces of wood-based panels with melaminic or phenolic paper sheets.
  • the plant comprises a heated press 10 (essentially of known type and therefore not further described or shown) and a contact-cooling unit 12 sequentially disposed after the press.
  • a conveyor 13 placed between the press and cooling unit is a conveyor 13 for transfer of packs 14 formed of the wood panels 15 and the associated facing sheets (disposed on one or both faces of the panel).
  • the press is heated to a first preset temperature for hot pressing to a first pressure of a pack placed thereon.
  • the cooling unit 12 comprises superposed faced plates 17, 18 that are cooled to a second preset temperature by an appropriate fluid circulating therein.
  • the plates can be closed towards each other by actuators 19 for coming into contact with the opposite faces of the pack after the pack comes out of the hot press.
  • the press temperature must be included between 150 and 210°C and the pressing pressure must be included between 20 and 40 kg/cm 2 .
  • the temperature in the cooling unit must be included between 20 and 60°C. It was found advantageous for the cooling plates to be pushed onto the pack surfaces to a pressure in the range of 1 to 2 kg/cm 2 .
  • the heated press is advantageously maintained closed on the pack for a period of time of 10 to 40 seconds, whereas the cooled plates are maintained closed on the pack for a period of time of 5 to 35 seconds.
  • the surface temperature of the panels immediately after they come out of the press is therefore approximately 100-150°C and the temperature conveniently reached on the panel surface before piling up of said panels is less than 50-70°C.
  • the cooling unit 12 comprises means 20 for suction of the fumes emitted from the pack disposed between the cooled plates.
  • This suction means is operated at least before closure of the cooled plates, to remove possible fumes before they may condense due to cooling of the pack. It was found in fact that condensate causes deformation and unacceptable spots on the finished product.
  • the suction means is disposed around at least part of the periphery of the upper cooled plate and comprises a pipeline 21 disposed along the edge of the upper plate and provided with a plurality of holes 22 for forced suction.
  • suction means it was also found advantageous for the suction means to be maintained in operation after closure of the cooled plates too, so as to capture the residual fumes that may be emitted from the edge of the pack submitted to cooling.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Laminated Bodies (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
EP02027041A 2001-12-11 2002-12-03 Verfahren und Anlage zum Beschichten von Paneeloberflächen mit Melaminharz- oder Phenolharz-Papier Withdrawn EP1319484A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20012603 2001-12-11
ITMI20012603 ITMI20012603A1 (it) 2001-12-11 2001-12-11 Metodo e impianto per la nobilitazione di superfici di pannelli con carte melaminiche o fenoliche

Publications (1)

Publication Number Publication Date
EP1319484A1 true EP1319484A1 (de) 2003-06-18

Family

ID=11448680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02027041A Withdrawn EP1319484A1 (de) 2001-12-11 2002-12-03 Verfahren und Anlage zum Beschichten von Paneeloberflächen mit Melaminharz- oder Phenolharz-Papier

Country Status (2)

Country Link
EP (1) EP1319484A1 (de)
IT (1) ITMI20012603A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102765112A (zh) * 2011-05-04 2012-11-07 劳特公司 用于木材制品的加压装置
WO2021218255A1 (zh) * 2020-04-27 2021-11-04 南兴装备股份有限公司 一种多路供带机构
CN114351507A (zh) * 2022-01-19 2022-04-15 安徽韩华建材科技股份有限公司 一种硫氧镁板热压三聚氰胺耐磨纸工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1629405A1 (de) * 1966-04-16 1971-01-21 Werz Furnier Sperrholz Verfahren zum Beschichten von Formteilen und Platten
DE2006781B1 (de) * 1970-02-14 1971-02-11 Siempelkamp S A Vaud (Schweiz) Verfahren zum Verguten von Tragerplat ten
DE4212164A1 (de) * 1992-04-10 1993-10-21 Keller Lufttechnik Gmbh & Co Kg Verfahren zum Absaugen von beim Pressen von Spanplatten entstehenden Luftverunreinigungen und zur Reinigung des Absaugluftstroms von diesen Verunreinigungen
EP0876887A2 (de) * 1997-04-30 1998-11-11 Sunds Defibrator Industries Aktiebolag Methode zur Herstellung einer Platte
EP0978359A1 (de) * 1998-08-03 2000-02-09 Espace Production Internationale (Société Anonyme) Kühleinheit für Platten z.B. Melaminharzplatten nach einem Heisspresszyklus
EP1136636A1 (de) * 2000-03-24 2001-09-26 Kronotec Ag Holzpartikelplatte, insbesondere Schalungsplatte

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1629405A1 (de) * 1966-04-16 1971-01-21 Werz Furnier Sperrholz Verfahren zum Beschichten von Formteilen und Platten
DE2006781B1 (de) * 1970-02-14 1971-02-11 Siempelkamp S A Vaud (Schweiz) Verfahren zum Verguten von Tragerplat ten
DE4212164A1 (de) * 1992-04-10 1993-10-21 Keller Lufttechnik Gmbh & Co Kg Verfahren zum Absaugen von beim Pressen von Spanplatten entstehenden Luftverunreinigungen und zur Reinigung des Absaugluftstroms von diesen Verunreinigungen
EP0876887A2 (de) * 1997-04-30 1998-11-11 Sunds Defibrator Industries Aktiebolag Methode zur Herstellung einer Platte
EP0978359A1 (de) * 1998-08-03 2000-02-09 Espace Production Internationale (Société Anonyme) Kühleinheit für Platten z.B. Melaminharzplatten nach einem Heisspresszyklus
EP1136636A1 (de) * 2000-03-24 2001-09-26 Kronotec Ag Holzpartikelplatte, insbesondere Schalungsplatte

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102765112A (zh) * 2011-05-04 2012-11-07 劳特公司 用于木材制品的加压装置
WO2021218255A1 (zh) * 2020-04-27 2021-11-04 南兴装备股份有限公司 一种多路供带机构
CN114351507A (zh) * 2022-01-19 2022-04-15 安徽韩华建材科技股份有限公司 一种硫氧镁板热压三聚氰胺耐磨纸工艺

Also Published As

Publication number Publication date
ITMI20012603A1 (it) 2003-06-11

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