EP0822041A2 - Procédé et machine pour fabriquer des profils façonnées en contreplaqués incurvés, notamment pour revêtir des tuyaux et similaires - Google Patents

Procédé et machine pour fabriquer des profils façonnées en contreplaqués incurvés, notamment pour revêtir des tuyaux et similaires Download PDF

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Publication number
EP0822041A2
EP0822041A2 EP97202351A EP97202351A EP0822041A2 EP 0822041 A2 EP0822041 A2 EP 0822041A2 EP 97202351 A EP97202351 A EP 97202351A EP 97202351 A EP97202351 A EP 97202351A EP 0822041 A2 EP0822041 A2 EP 0822041A2
Authority
EP
European Patent Office
Prior art keywords
press
sheets
shaped
counterpress
bending
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.)
Ceased
Application number
EP97202351A
Other languages
German (de)
English (en)
Other versions
EP0822041A3 (fr
Inventor
Benigno De Zanet
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.)
Xiloform SpA
Original Assignee
Xiloform 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 Xiloform SpA filed Critical Xiloform SpA
Publication of EP0822041A2 publication Critical patent/EP0822041A2/fr
Publication of EP0822041A3 publication Critical patent/EP0822041A3/fr
Ceased 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
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
    • B27D1/083—Presses specially designed for making the manufacture of shaped plywood articles

Definitions

  • the present invention relates to a process and a machine for manufacturing shaped profiles in curved plywood, particularly but not exclusively for covering pipes and alike.
  • the traditional process of manufacturing of shaped profiles in curved plywood provides for the overlay of several flat wooden sheets with interposed adhesive, that are caused to adhere to each other of a heated press which compresses said sheets one against the other, also determining their bending in function of the shape of the press itself.
  • object of the present invention has been to provide a process and a machine specifically fit for manufacturing shaped profiles of considerable length in curved plywood.
  • a process for manufacturing shaped profiles in curved plywood comprising overlay of several flat wooden sheets with interposed adhesive and application of pressure over said overlaid sheets by means of a shaped press at high temperature for the mutual adhesion of the sheets themselves and their bending up to the desired shape, characterized in that said press is operated against a counterpress shaped in substantially complementary way which causes the lateral block of the flat overlaid sheets before the application of a final sheet bending pressure.
  • a machine comprising a heated press shaped in function of the final desired appearance of the profile to be manufactured and means for providing a pressure engagement between said press and a plurality of wooden overlaid sheets with interposed adhesive to determine the adhesion of the sheets themselves and their bending up to a desired shape, characterized in that it comprises a counterpress shaped in substantially complementary way to cause the lateral block of the overlaid sheets before the application of a final sheet bending pressure.
  • the wooden overlaid sheets get an initial bending at fairly reduced pressure, and then, after their lateral block caused by the shape not precisely complementary of the counterpress, a final bending at high pressure which lets the wooden sheets reach the desired bending.
  • Fig. 1 a plurality of wooden flat sheets 1 are schematically shown in perspective view, among which a layer of adhesive 2 working at high temperature is interposed.
  • the set of Fig.1 is inserted in a machine as the one in Fig. 2, comprising a wedge shaped press 3, heated at high temperature, and a counterpress 4 with adjacent flexible sheets 5, equipped with a cavity 6 shaped in substantially complementary way with respect to that of press 3, but with an angle width slightly inferior to that of the press itself.
  • a flexible metallic plate 7 which is usually kept in horizontal position, as in Fig.2, by a vertical shaft 8 stressed by an elastic reaction member 9.
  • the initial descent of press 3 determines, at fairly reduced pressure, the adhesive melting adhesion and the progressive bending of the wooden sheets 1 and of the metallic plate 7 (Fig.3) until, because of the wider angle of press 3 in comparison with cavity 6 of counterpress 4, the lateral edges of the wooden sheets 1 and of the metallic plate 7 are blocked between press 3 and counterpress 4.
  • Bending of the profile can naturally be modified by varying the front shape of press 3. Also it is possible to obtain a profile curved in asymmetrical way, by overlaying in that case to plate 7 a lateral thickness able to compensate for the absence ,over that side, of the flat sheets 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Laminated Bodies (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
EP97202351A 1996-07-31 1997-07-25 Procédé et machine pour fabriquer des profils façonnées en contreplaqués incurvés, notamment pour revêtir des tuyaux et similaires Ceased EP0822041A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT96MI001645A IT1283378B1 (it) 1996-07-31 1996-07-31 Procedimento e macchina per la fabbricazione di profili in legno compensato curvato, particolarmente per la copertura di tubazioni e
ITMI961645 1996-07-31

Publications (2)

Publication Number Publication Date
EP0822041A2 true EP0822041A2 (fr) 1998-02-04
EP0822041A3 EP0822041A3 (fr) 1999-03-24

Family

ID=11374725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97202351A Ceased EP0822041A3 (fr) 1996-07-31 1997-07-25 Procédé et machine pour fabriquer des profils façonnées en contreplaqués incurvés, notamment pour revêtir des tuyaux et similaires

Country Status (2)

Country Link
EP (1) EP0822041A3 (fr)
IT (1) IT1283378B1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002095157A1 (fr) * 2001-05-24 2002-11-28 Eurosistemi Italia S.R.L. Procede de flexion de panneaux de platre et composants ainsi obtenus
DE10124912C1 (de) * 2001-05-17 2002-12-05 Achim Moeller Verfahren zur Herstellung eines dreidimensional verformten Körpers
CN104947847A (zh) * 2015-06-15 2015-09-30 深圳赤晓建筑科技有限公司 弧形夹芯板及弧形墙体以及弧形夹芯板的生产方法
CN114425806A (zh) * 2022-01-08 2022-05-03 广东欧梵家具有限公司 一种弧形板、弧形板压弯定型模具及其压弯定型工艺

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE456958A (fr) * 1942-09-18 1944-08-31
US2418100A (en) * 1943-01-22 1947-03-25 Curved Plywood Products Co Machine for making plywood in curved shapes
DE889066C (de) * 1951-12-25 1953-09-07 Theodor Mueller & Co Vorrichtung zum Furnieren von Holzteilen, insbesondere Fuessen fuer Lampen- und andere Tische, profilierten Leisten u. dgl.
FR1358646A (fr) * 1963-03-08 1964-04-17 Procédé de fabrication de corps creux et corps creux ainsi obtenus
US3816044A (en) * 1973-02-07 1974-06-11 Foldcraft Co Automatic press
US4484609A (en) * 1983-03-18 1984-11-27 Simmons Universal Corporation Wedge die for producing bent plywood

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10124912C1 (de) * 2001-05-17 2002-12-05 Achim Moeller Verfahren zur Herstellung eines dreidimensional verformten Körpers
WO2002095157A1 (fr) * 2001-05-24 2002-11-28 Eurosistemi Italia S.R.L. Procede de flexion de panneaux de platre et composants ainsi obtenus
RU2286251C2 (ru) * 2001-05-24 2006-10-27 Эуросистеми Италия С.Р.Л. Способ изгибания гипсокартонных панелей и элементы строительных конструкций, полученные этим способом
CN104947847A (zh) * 2015-06-15 2015-09-30 深圳赤晓建筑科技有限公司 弧形夹芯板及弧形墙体以及弧形夹芯板的生产方法
CN114425806A (zh) * 2022-01-08 2022-05-03 广东欧梵家具有限公司 一种弧形板、弧形板压弯定型模具及其压弯定型工艺

Also Published As

Publication number Publication date
IT1283378B1 (it) 1998-04-17
EP0822041A3 (fr) 1999-03-24
ITMI961645A0 (fr) 1996-07-31
ITMI961645A1 (it) 1998-01-31

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