US3679790A - Method of finishing boards of vegetable material - Google Patents

Method of finishing boards of vegetable material Download PDF

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Publication number
US3679790A
US3679790A US48864A US3679790DA US3679790A US 3679790 A US3679790 A US 3679790A US 48864 A US48864 A US 48864A US 3679790D A US3679790D A US 3679790DA US 3679790 A US3679790 A US 3679790A
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US
United States
Prior art keywords
board
boards
rollers
sliding movement
fiber
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Expired - Lifetime
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US48864A
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English (en)
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Alf Adolf Alfsen
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Individual
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Individual
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    • 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

Definitions

  • ABSTRACT [30] Forelgn Apphcanon Pnomy Data A method and an apparatus for finishing boards of vegetable Dec. 12, 1966 Sweden ..17032/66 material including the production of a sliding movement over at least one surface of the board.
  • Specific apparatus elements [52] US. Cl ..264/280, 264/ 1 19, 425/324, are provided to effect the sliding movement including rotative 425/335, 425/363 and non-rotative structures.
  • the method includes high tem- [51] Int. Cl.
  • the board may be treated after drying and upon both sides thereof simultaneously.
  • this invention relates to the finishing of 5 boards of vegetable fiber material and to an apparatus suited for carrying out the said method.
  • One main object of the present invention is to provide a method of treating fiber boards so that they get excellent properties in one or several of the respects set out above while at the same time eliminating the drawbacks inherent to the known methods.
  • Another object of the invention is to provide a method of finishing fiber boards which can be performed rapidly without being dependent of specific admixtures.
  • the fiber boards are advanced between two surfaces under high temperature and at high pressure with a speed differing from that of at least one of the surfaces so as to create a sliding movement between said surface and said board.
  • reference numeral 10 denotes a heat insulated housing in which a number of pairs of rollers or cylinders are mounted, such as in the illustrated embodiment three pairs denoted by, respectively, 12, I4; 16, 18; 20, 22.
  • the rollers are made of metal, such as steel cast, and preferably all of them have polished cylindrical surfaces.
  • the rollers l6, l8 and suitably also the other rollers are provided with internal devices for the heating thereof to a high temperature, such as 250 to 500 C.
  • the heating may be effected by electrically or by means of hot oil or some other suitable heating medium.
  • Fiber boards 24 are introduced into the chamber 25 encased by the housing through a gap space 26 and are discharged from the chamber through another gap space 28, sealing means 30 and 32, respectively, being disposed for closing the gap space on both sides of the board, if desired. Said boards may before their introduction into the chamber be sprayed on one or both sides with water, oil, synthetic resins etc. supplied to nozzles 34 by pipes 36.
  • the collaborating pairs of rollers are actuated by means (not shown) in such a manner as to cause the rollers to be pressed against the board 24 on both sides thereof with a high pressure.
  • This pressure calculated per centimeter in the axial direction of the rollers, the so-called linear pressure, can amount to 50 to 200 kgs or even more. That is, the linear pressure is based on the amount of weight imposed on each centimeter of length along the roller axis.
  • One or several pairs of rollers preferably the two outer ones 12, 14 and 20, 22, respectively, convey the board through the chamber 24 with a predetermined speed while exerting pressure on said board. These pairs of rollers preferably also transfer heat to the board.
  • One or several pairs of rollers, in the illustrated embodiment the intermediate pair l6, 18, has another peripheral speed than the speed of advance of the wood fiber boards 24.
  • This peripheral speed may thus be higher or lower than that of the other pairs of rollers, but is effective in the same direction.
  • This causes the rollers l6, 18 to slide or skid on the boards whereby a kind of ironing effect is obtained, which in conjugation with the high pressure and the high temperature imparts to the boards the desired surface treatment so that they get good capability of becoming painted due to closing the pores in their surfaces and simultaneous elimination of the phenomenon of fiber erection. It is also possible to compress finally dried boards so that they become thinner and thus obtain higher density and mechanical strength, if desired in combination with improved capacity of becoming painted.
  • the chamber 25 can be provided with an outlet 38 in which a valve 40 for control of the temperature in the chamber is provided.
  • the surface treatment of the fiber boards 24 passing through the chamber 25 in subsequent rows may be effected on one or both sides of the board.
  • only one of the rollers 16, 18 must have another relative speed than the speed of advance of the boards.
  • the wire marking existing on one of their surfaces can be ground off beforehand.
  • the manufacture of boards of this last-mentioned type has been possible only by applying the wet-dry process or the dry process.
  • the boards treated according to the invention may be hardboard, semi-hardboard and porous board.
  • rollers effecting the surface treatment such as in the embodiment shown one of the rollers l6, 18 or both of them, may also be non-rotative or rotate in a direction opposite to the direction of advance of the boards, in which case the effect on the surfaces of the boards becomes particularly great.
  • the number of roller pairs serving as conveyors for the .boards 24 is preferably greater than the number of roller pairs creating sliding friction, especially if all have cylindric surfaces finished to the same degree.
  • the members producing the relative movement must not necessarily be rollers or cylinders but can also be constituted of sliding blocks, in particular in case they are non-rotative, or of endless bands.
  • the invention includes also the treatment of wood particle boards and the like.
  • a method for finishing the surface of rigid boards of vegetable fiber material comprising the steps of:
  • said sliding movement being produced by maintaining the rotating speed of at least one pressure roller at a different rate than the speed of the advancing board.
  • a method as defined in claim 1 wherein said sliding movement is produced by passing the advancing board between at least one pair of rollers that are rotating at a relative speed less than the advancing speed of the board.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
US48864A 1966-12-12 1970-06-12 Method of finishing boards of vegetable material Expired - Lifetime US3679790A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE17032/66A SE333238B (sv) 1966-12-12 1966-12-12 Saett och anordning foer att efterbehandla plattor av vegetabiliskt material

Publications (1)

Publication Number Publication Date
US3679790A true US3679790A (en) 1972-07-25

Family

ID=20303160

Family Applications (1)

Application Number Title Priority Date Filing Date
US48864A Expired - Lifetime US3679790A (en) 1966-12-12 1970-06-12 Method of finishing boards of vegetable material

Country Status (5)

Country Link
US (1) US3679790A (cs)
DE (1) DE1653188A1 (cs)
FR (1) FR1547950A (cs)
NO (1) NO124220B (cs)
SE (1) SE333238B (cs)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4007076A (en) * 1974-12-30 1977-02-08 Masonite Corporation Post-press embossing of a consolidated man-made board
US4018550A (en) * 1973-10-12 1977-04-19 Helmuth Theysohn Stripping and depositing mechanism for calendered sheets
US4024014A (en) * 1975-12-15 1977-05-17 Conwed Corporation Non-combustible hardboard sheet
US4059378A (en) * 1975-09-12 1977-11-22 Sollich Ag Method and a machine for removing from their molds moldings of confectionery masses which have been formed into chocolate centers, bars or other single or continuous moldings
US5352110A (en) * 1991-03-12 1994-10-04 Takeda Chemical Industries, Ltd. Molding apparatus for molding fiber reinforced resin with plurality of roll pairs
US20100213633A1 (en) * 2009-02-20 2010-08-26 Alexander James Kidwell Apparatus and Method for Edge Sealing of Foam Boards
CN102149522B (zh) * 2008-07-10 2014-01-08 Si奥卢姆控股有限公司 用于mdf板材的边缘修整的方法
CN106827165A (zh) * 2016-12-25 2017-06-13 重庆义三木业有限公司 刨花板的冷却方法
US12420305B2 (en) * 2019-08-12 2025-09-23 Louisiana-Pacific Corp. Coating process for engineered-wood panels or components

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2379373A1 (fr) * 1977-02-07 1978-09-01 Masonite Corp Procede pour le matricage apres pressage d'un panneau artificiel solidifie
GB8729922D0 (en) * 1987-12-22 1988-02-03 Emhart Materials Uk Apparatus for controlling thickness of heat-softenable sheet material
FR2640546B1 (fr) * 1988-12-21 1991-04-12 Saint Gobain Isover Procede d'obtention d'un panneau d'isolation surface a base de fibres minerales
DE19812523A1 (de) * 1998-03-21 1999-11-18 Schenck Panel Production Syste Verfahren und Vorrichtung zur Strukturierung glatter Holzwerkstoffplatten

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2335462A (en) * 1940-07-27 1943-11-30 Armstrong Cork Co Method and apparatus for treating felt
US3021244A (en) * 1955-12-23 1962-02-13 John G Meiler Process for producing high density hardboard
US3157723A (en) * 1961-07-05 1964-11-17 Du Pont Process and apparatus for embossing sheet material
US3230287A (en) * 1962-09-27 1966-01-18 Weyerhaeuser Co Process for manufacturing moldable fibrous panels
US3518157A (en) * 1965-09-08 1970-06-30 Johns Manville Method for forming and curing fibrous materials

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2335462A (en) * 1940-07-27 1943-11-30 Armstrong Cork Co Method and apparatus for treating felt
US3021244A (en) * 1955-12-23 1962-02-13 John G Meiler Process for producing high density hardboard
US3157723A (en) * 1961-07-05 1964-11-17 Du Pont Process and apparatus for embossing sheet material
US3230287A (en) * 1962-09-27 1966-01-18 Weyerhaeuser Co Process for manufacturing moldable fibrous panels
US3518157A (en) * 1965-09-08 1970-06-30 Johns Manville Method for forming and curing fibrous materials

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018550A (en) * 1973-10-12 1977-04-19 Helmuth Theysohn Stripping and depositing mechanism for calendered sheets
US4007076A (en) * 1974-12-30 1977-02-08 Masonite Corporation Post-press embossing of a consolidated man-made board
US4059378A (en) * 1975-09-12 1977-11-22 Sollich Ag Method and a machine for removing from their molds moldings of confectionery masses which have been formed into chocolate centers, bars or other single or continuous moldings
US4024014A (en) * 1975-12-15 1977-05-17 Conwed Corporation Non-combustible hardboard sheet
US5352110A (en) * 1991-03-12 1994-10-04 Takeda Chemical Industries, Ltd. Molding apparatus for molding fiber reinforced resin with plurality of roll pairs
US5533880A (en) * 1991-03-12 1996-07-09 Takeda Chemical Industries, Ltd. Molding apparatus having a movable die and a counter roll
CN102149522B (zh) * 2008-07-10 2014-01-08 Si奥卢姆控股有限公司 用于mdf板材的边缘修整的方法
US20100213633A1 (en) * 2009-02-20 2010-08-26 Alexander James Kidwell Apparatus and Method for Edge Sealing of Foam Boards
US8333582B2 (en) * 2009-02-20 2012-12-18 Azek Building Products, Inc. Apparatus and method for edge sealing of foam boards
US10850452B2 (en) 2009-02-20 2020-12-01 Cpg International Llc Apparatus and method for edge sealing of foam boards
CN106827165A (zh) * 2016-12-25 2017-06-13 重庆义三木业有限公司 刨花板的冷却方法
US12420305B2 (en) * 2019-08-12 2025-09-23 Louisiana-Pacific Corp. Coating process for engineered-wood panels or components

Also Published As

Publication number Publication date
SE333238B (sv) 1971-03-08
NO124220B (cs) 1972-03-20
DE1653188A1 (de) 1971-11-25
FR1547950A (fr) 1968-11-29

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