US3734669A - Apparatus for continuous manufacture of chipboard - Google Patents

Apparatus for continuous manufacture of chipboard Download PDF

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Publication number
US3734669A
US3734669A US00192373A US3734669DA US3734669A US 3734669 A US3734669 A US 3734669A US 00192373 A US00192373 A US 00192373A US 3734669D A US3734669D A US 3734669DA US 3734669 A US3734669 A US 3734669A
Authority
US
United States
Prior art keywords
band
gas
pressing roller
duct
housing
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.)
Expired - Lifetime
Application number
US00192373A
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English (en)
Inventor
H Ettel
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.)
Mende Wilhelm and Co
Original Assignee
Mende Wilhelm and Co
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 Mende Wilhelm and Co filed Critical Mende Wilhelm and Co
Application granted granted Critical
Publication of US3734669A publication Critical patent/US3734669A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/26—Moulding or pressing characterised by using continuously acting presses having a heated press drum and an endless belt to compress the material between belt and drum

Definitions

  • the heating means comprises a sheet metal housing surrounding the portion of the belt which runs against the drum, an oil heater for discharging hot air and exhaust gas into said housing and a recirculating duct for carrying the discharged gases back to the point where the fresh gases enter the housing.
  • the sheet metal housing may be of a configuration to direct the gases flowing through the housing into a tortuous path to promote heat transfer.
  • the invention relates to an arrangement for the continuous manufacture of chipboards, comprising an endless band made of steel, on to which is scattered a layer of wood chips to which binders are added, the said band being under tension and running continuously over a pressing roller and wrapping partially around the latter.
  • the invention has for its object to provide an arrangement for the continuous manufacture of chipboards, with which the heat is supplied from outside towards the band and thus to the layer of wood chips in an economical and simple manner.
  • the object forming the basis of the invention is achieved by the band, in the region in which it wraps around the pressing roller, forming at least partially a part of an air duct through which hot air is flowing.
  • the hot air in the air stream can be simply supplied with the exhaust gas of a burner, more especially an oil burner. Heat can be cheaply produced by such a burner without the more involved method of electric current, which is expensive. Since the exhaust gas of the burner can be fed directly into the air duct, heat exchanges are also superfluous, which would be necessary if the hot air were heated by steam, for example, by heat exchange.
  • the heat transfer between the hot gases and the steel strip is relatively poor, but it can be substantially improved by high flow velocities and by additional guiding plates or plates producing a turbulent flow.
  • the air duct prefferably be arranged to provide a circulation in the region of the wrapping position of the band, so that the discharging air and exhaust gas is recirculated into the entry side.
  • a burner more especially an oil burner
  • This excess pressure valve is most expediently arranged at a position in the circulation where the temperature is lowest. This position is usually just upstream of the connecting point for the burner, that is to say, downstream of the outlet point at the end of the wrapping of the band. It is obvious that all exposed parts of the duct are heat-insulated. The manufacture of the duct or the duct sections is possible in a quite simply manner from comparatively thin sheet metal, because the pressures being set up are low. The heat insulation also does not present any difficulties.
  • chips 2 mixed with a binder are scattered on a band 3, which travels continuously in the direction of an arrow 4 over a table 5.
  • a uniform layer or bed 6 of chips is formed.
  • the band 3 travels with the bed 6 around a guide roller 8 on to a pressing roller 7 and wraps around the latter as far as a guide roller 9.
  • the band is held under tension by means which are not shown.
  • it is pressed by pressure rollers 10, l1, l2 and 13 against the pressing roller 7 in the wrapping region of the latter.
  • the band 3 is covered by a metal sheet 14, so that an air duct 15 is formed between the band 3 and the metal sheet 14.
  • the inlet and the outlet of the air duct 15 are connected to one another by a hollow pipe 16, to provide for recirculating the gases.
  • a fan 17 provides for a sufficiently high flow velocity, which guarantees a sufficient heat transfer between the band 3 and the gas.
  • the plate 14 and duct 16 are insulated by heating insulating means 17 and 18. The heat insulation 18 is only partly shown.
  • guide plates 19, 20 and 21 Arranged on the metal sheet 14 are guide plates 19, 20 and 21 which project into the interstices between the pressure rollers 10-11, 11-12 and 12-13 and direct the hot air and gas into these interstices towards the band 3.
  • a burner 22 Connected to the duck 16 upstream of the fan 17 is a burner 22, which delivers heat into the circulating system by means of its exhaust gas. Excess pressure in the circulating system is avoided by an excess pressure valve 23, through which the excess gases are vented.
  • Apparatus for the continuous manufacture of chipboards comprising an endless band consisting of steel,
  • Apparatus according to claim 1 characterized in that the pressing roller, in the region in which the band wraps around it, is covered with spaced gas-directing plates, both on the circumference and also laterally, so that the gas duct is formed between these air-directing plates and the steel band.
  • Apparatus according to claim 2 characterized in that gas-directing plates are disposed to direct the gas.

Landscapes

  • 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)
  • Press Drives And Press Lines (AREA)
US00192373A 1970-10-30 1971-10-26 Apparatus for continuous manufacture of chipboard Expired - Lifetime US3734669A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2053351A DE2053351C3 (de) 1970-10-30 1970-10-30 Einrichtung zur Herstellung einer endlosen dünnen Spanplattenbahn

Publications (1)

Publication Number Publication Date
US3734669A true US3734669A (en) 1973-05-22

Family

ID=5786648

Family Applications (1)

Application Number Title Priority Date Filing Date
US00192373A Expired - Lifetime US3734669A (en) 1970-10-30 1971-10-26 Apparatus for continuous manufacture of chipboard

Country Status (15)

Country Link
US (1) US3734669A (fr)
AT (1) AT309787B (fr)
BE (1) BE774597A (fr)
BR (1) BR7107286D0 (fr)
CA (1) CA924227A (fr)
CH (1) CH524450A (fr)
CS (1) CS153596B2 (fr)
DE (1) DE2053351C3 (fr)
ES (1) ES396889A1 (fr)
FR (1) FR2111438A5 (fr)
NL (1) NL7114762A (fr)
NO (1) NO129445B (fr)
RO (1) RO77052A (fr)
SE (1) SE366248B (fr)
SU (1) SU388394A3 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3832115A (en) * 1971-05-29 1974-08-27 Mende & Co W Apparatus for compressing chipboards
US3915612A (en) * 1973-02-22 1975-10-28 Berstorff Gmbh Masch Hermann Apparatus for the continuous manufacture of pressed panels for loose materials
US4946635A (en) * 1985-10-30 1990-08-07 Wilheim Mende Gmbh & Co. Method for the continuous production of chip, fiber-and similar boards
US5094308A (en) * 1989-04-25 1992-03-10 Firma Theodor Hymmen Method and device for heating pressure belt of a press
US5558016A (en) * 1987-06-15 1996-09-24 Firma Theodor Hymmen Arrangement for applying a surface pressure to workpieces driven by a pressing band
US5711972A (en) * 1994-05-13 1998-01-27 Sunds Defibrator Industries Ab Device for board manufacture
WO2014195445A1 (fr) * 2013-06-07 2014-12-11 Dieffenbacher GmbH Maschinen- und Anlagenbau Presse pour la fabrication de panneaux et procédé de fonctionnement d'une telle presse

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1953704A (en) * 1930-06-02 1934-04-03 Erdmann Konrad Apparatus for manufacturing porous bodies from fibrous materials
US2526318A (en) * 1948-02-10 1950-10-17 Us Rubber Co Sheet finishing apparatus
US2812542A (en) * 1955-08-04 1957-11-12 American Biltrite Rubber Co Method and apparatus for relieving vulcanized belting of internal stresses
US2991824A (en) * 1957-08-29 1961-07-11 Celotex Corp Recessed end gypsum board and process of manufacture
US3039137A (en) * 1958-02-10 1962-06-19 American Biltrite Rubber Co Apparatus for forming plastic sheets
US3096227A (en) * 1958-06-04 1963-07-02 Gerrit Jan Van Elten Apparatus for producing fibrous building boards
US3241182A (en) * 1963-04-23 1966-03-22 Kessler Milton Apparatus for the production of heavily embossed, thick plastic mats
US3400196A (en) * 1964-06-30 1968-09-03 Union Carbide Corp Method for the permanent compression of a sheet of flexible polyurethane foam

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1953704A (en) * 1930-06-02 1934-04-03 Erdmann Konrad Apparatus for manufacturing porous bodies from fibrous materials
US2526318A (en) * 1948-02-10 1950-10-17 Us Rubber Co Sheet finishing apparatus
US2812542A (en) * 1955-08-04 1957-11-12 American Biltrite Rubber Co Method and apparatus for relieving vulcanized belting of internal stresses
US2991824A (en) * 1957-08-29 1961-07-11 Celotex Corp Recessed end gypsum board and process of manufacture
US3039137A (en) * 1958-02-10 1962-06-19 American Biltrite Rubber Co Apparatus for forming plastic sheets
US3096227A (en) * 1958-06-04 1963-07-02 Gerrit Jan Van Elten Apparatus for producing fibrous building boards
US3241182A (en) * 1963-04-23 1966-03-22 Kessler Milton Apparatus for the production of heavily embossed, thick plastic mats
US3400196A (en) * 1964-06-30 1968-09-03 Union Carbide Corp Method for the permanent compression of a sheet of flexible polyurethane foam

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3832115A (en) * 1971-05-29 1974-08-27 Mende & Co W Apparatus for compressing chipboards
US3915612A (en) * 1973-02-22 1975-10-28 Berstorff Gmbh Masch Hermann Apparatus for the continuous manufacture of pressed panels for loose materials
US4946635A (en) * 1985-10-30 1990-08-07 Wilheim Mende Gmbh & Co. Method for the continuous production of chip, fiber-and similar boards
US5558016A (en) * 1987-06-15 1996-09-24 Firma Theodor Hymmen Arrangement for applying a surface pressure to workpieces driven by a pressing band
US5713271A (en) * 1987-06-15 1998-02-03 Firma Theodor Hymmen Method of and arrangement for applying a surface pressure to workpieces driven by a pressing band
US5094308A (en) * 1989-04-25 1992-03-10 Firma Theodor Hymmen Method and device for heating pressure belt of a press
US5711972A (en) * 1994-05-13 1998-01-27 Sunds Defibrator Industries Ab Device for board manufacture
WO2014195445A1 (fr) * 2013-06-07 2014-12-11 Dieffenbacher GmbH Maschinen- und Anlagenbau Presse pour la fabrication de panneaux et procédé de fonctionnement d'une telle presse

Also Published As

Publication number Publication date
ES396889A1 (es) 1974-06-16
CA924227A (en) 1973-04-10
NO129445B (fr) 1974-04-16
FR2111438A5 (fr) 1972-06-02
BR7107286D0 (pt) 1973-05-17
CS153596B2 (fr) 1974-02-25
DE2053351B2 (de) 1974-04-04
BE774597A (fr) 1972-02-14
CH524450A (de) 1972-06-30
DE2053351A1 (de) 1972-05-10
SU388394A3 (fr) 1973-06-22
AT309787B (de) 1973-09-10
DE2053351C3 (de) 1974-11-07
NL7114762A (fr) 1972-05-03
RO77052A (fr) 1983-04-29
SE366248B (fr) 1974-04-22

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