EP0344192B1 - Verfahren und anlage zur herstellung von holzspanplatten und ähnlichen plattenwerkstoffen - Google Patents

Verfahren und anlage zur herstellung von holzspanplatten und ähnlichen plattenwerkstoffen Download PDF

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Publication number
EP0344192B1
EP0344192B1 EP88901546A EP88901546A EP0344192B1 EP 0344192 B1 EP0344192 B1 EP 0344192B1 EP 88901546 A EP88901546 A EP 88901546A EP 88901546 A EP88901546 A EP 88901546A EP 0344192 B1 EP0344192 B1 EP 0344192B1
Authority
EP
European Patent Office
Prior art keywords
fill
edge
particles
belt
heat
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
EP88901546A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0344192A1 (de
Inventor
Karl-Heinz Ahrweiler
Bernd Heimes
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.)
Eduard Kuesters Maschinenfabrik GmbH and Co KG
Original Assignee
Eduard Kuesters Maschinenfabrik GmbH and Co 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 Eduard Kuesters Maschinenfabrik GmbH and Co KG filed Critical Eduard Kuesters Maschinenfabrik GmbH and Co KG
Priority to AT88901546T priority Critical patent/ATE69762T1/de
Publication of EP0344192A1 publication Critical patent/EP0344192A1/de
Application granted granted Critical
Publication of EP0344192B1 publication Critical patent/EP0344192B1/de
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
    • B27N3/24—Moulding or pressing characterised by using continuously acting presses having endless belts or chains moved within the compression zone
    • 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
    • B27N3/10—Moulding of mats
    • B27N3/14—Distributing or orienting the particles or fibres

Definitions

  • the invention relates to a method of the type corresponding to the preamble of claim 1 and a corresponding system, as are known from DE-C-23 55 797.
  • the form tapes had no thermal contact with the support structure or the one from the edge DE-C- 23 55 797 known construction the heat from the support structure to the form-transferring, the entire width rolling rollers more, so that the temperature of the shape of the tapes dropped significantly towards the edge.
  • the marginal areas contracted lengthways and, as the wide central area of the forming tapes was at working temperature, considerable thermal stresses developed.
  • Such thermal stresses became critical in the area of the deflecting drums because the thermal stresses there were superimposed on the stresses caused by the considerable longitudinal tension of the forming tapes and the stresses due to their deflection due to the stretching of the outer fiber.
  • the invention has for its object to design a generic method and such a system so that on a double belt press of a predetermined nominal working width, the webs resulting in a smaller width can also be run.
  • the drop in temperature at the edge of the form belts which would otherwise have been caused by the system missing in the smaller working widths and the associated poorer heat transfer into the form bands, is avoided by the fact that the system is now artificially manufactured there. As a result, heat from the support structure is also transferred to the forming belts in the peripheral zone, so that the temperature drop does not occur or can in any case be limited to a harmless level.
  • the system pressure does not have to be be exactly the same as the system pressure in the middle part of the width corresponding to the fill, although this would of course be preferable to create ideally equal conditions. However, it is also sufficient if the system pressure is only so high that the temperature can be kept at a value which limits the thermal stresses to an acceptable level.
  • the arrangement of the forming tapes on the support structure under pressure, which ensures heat transfer, is produced in the invention with simple means, namely using the particles which are available in any case. Because of the character of these particles, this pressure is automatically adapted to the compression properties of the bed in the central region.
  • the particles for the edge fill should be free of binders, because they would otherwise also harden and the hardened edge parts of the formed plate would have to be discarded, which is just as uneconomical as producing a wider plate from the outset and using a wide edge strip to reduce it to the desired smaller one To be trimmed.
  • the particles for the edge fill can be taken from the supply for the main fill according to claim 2.
  • the moisture content is of crucial importance for the amount of heat that is extracted from the forming belt, because the liquid contained in the particles, mostly water, evaporates and the necessary for it Amount of heat must be applied. So if the temperature of the edge zone of the forming tapes is to be kept high, it is advisable to ensure that as little heat as possible is lost for the evaporation of water in this area, ie the particles here, including the binder, have a lower moisture content than that Particles of the main bed.
  • the procedure according to claim 4 is recommended, according to which the particles of the edge fill are returned to the supply which also feeds the main fill, so that at least some of the particles of the edge fill are processed into a plate after a single pass and essentially for the Edge fill always new particles are used.
  • a double belt press for the production of chipboard, fiberboard and other plate-shaped materials is shown, which consist of particles bound by means of a binder that cures under pressure and heat. It comprises an upper forming belt 1 made of sheet steel of about 1 to 1.5 mm in thickness and a similar lower forming belt 2. Between the forming belts 1, 2, a web 4 is pressed out of a bed 4 'in a pressing section 3, which is made of a pourable material exists that results in one of the aforementioned materials after pressing.
  • the upper forming belt 1 runs around rollers or drums 5,6 arranged transversely to the web 4, of which the drum 6 can be pivoted in a fixed stand 7, the drum 5 in a support 8 on the floor about an axis running transversely to the web 4 Stand 9 is mounted.
  • the stand 9 is moved via the hydraulic cylinder 10 and the forming belt 1 is stretched in this way.
  • the forming belt 2 runs over drums 11, 12 arranged transversely to the web 4, of which the drum 11 is mounted in a fixed stand 13, the drum 12 in a stand 14 movable on rails is.
  • the stand 14 can be moved in the longitudinal direction of the web by hydraulic cylinders 15 and the forming belt 2 can be tensioned in this way.
  • the form belts are driven by the drums.
  • the form strips 1,2 run in the sense indicated by the arrows 16 through the device, so that the bed 4 'applied to the right side according to FIG. 1 by means not shown is drawn into the pressing section 3.
  • the outgoing compressed web 4 is removed in the left area of the forming belt 2 according to FIG. 1 by suitable devices, not shown.
  • an upper support structure 17 is provided in the inner region of the forming belt 1, which cooperates with a lower supporting structure 18 provided in the inner region of the lower forming belt 2.
  • the support structures 17, 18 support the areas of the shaping tapes 1, 2 facing the web 4 against the web and press them flatly against one another with great force.
  • the support structures 17, 18 each consist of individual supports 19, 20, which are arranged opposite one another above and below the form belts 1, 2 and the web 4 (FIG. 2). Each pair of supports 19, 20 is clamped by lateral spindles 21 (FIG. 3), so that individual pressure members which are self-contained are formed.
  • Strong plates 26, 27 are located between the carriers 19, 20 and the shaping bands 1, 2, which transmit the force exerted by the individual carriers 19, 20 evenly to the shaping bands 1, 2 and contain the channels 40 (FIG. 4). in which heating elements are arranged or through which a heating medium is passed.
  • Roller chains 30 are arranged between the mutually facing sides of the plates 26, 27 and the shaping belts 1, 2, on which the shaping belts 1, 2 roll relative to the plates 26, 27 and which run endlessly in a vertical longitudinal plane around the plates 26, 27.
  • the rollers of the roller chains 30 transmit both the pressure and the heat of the plates 26, 27 to the shaping belts 1, 2 and thus the web 4 that forms.
  • roller chains 30 can either in the actual pressing area, i.e. between the carriers 19, 20 and the plates 26, 27 can be returned, as is indicated in FIG. 2 for the plate 26 and in FIG. 4.
  • This embodiment has the advantage that the roller chains 30 maintain their temperature substantially constant during circulation.
  • the plates 26, 27 are made up of a heating and support plate 43 and a separate return plate 44 with return grooves 42 for the roller chains 30. It is a partial cross section through an edge region located above the web 4 according to FIG. 2.
  • the plates 43 have the heating channels 40, which are connected to one another at the ends via pipe elbows 45 to form a closed conduit, and smooth running surfaces 41, which form the common rolling surfaces for the roller chains 30 arranged next to one another, which can be seen in FIG. 4.
  • roller chains 30 roll between them and the facing running surfaces 41 of the plates 43. Adjacent roller chains 30 lie directly opposite one another with their outer end faces.
  • the right edge 31 of the bed and the plate web 4 according to FIG. 4 lies approximately at the level of the right edge of the roller chains 30.
  • a bed 33 of wood shavings or other suitable particles is then applied in the usual way to the forming belt 2, the width 38 of which is less than the nominal working width 34 and is characterized by the position of the edge 32 in FIG. 4.
  • These wood chips or other particles are provided with binders, which is to be indicated in the drop area 39 in FIG. 2 and in FIGS. 4 to 6 by the dotted lines.
  • edge beds 36 are sprinkled in the two edge zones 35 of the pressing section 3 which are not covered by the bed 33 and which extend outward from the edge 32 of the main bed 33 to the edge 31 of the pressing area and provide a counterpressure there. which holds the forming tapes 1, 2 in the edge zones 35 in a comparable manner against the roller chains 30, as is the case in the area of the main bed 33.
  • the material of the edge fill 36 is the same as that of the main fill 33. It is taken from the common supply 50 (FIG. 6) of unglued chips via conveyor sections 51, from which the material for the main fill 33 is also drawn off via the conveyor section 52. However, binder is added to the material for the main bed 33 before it is sprinkled in the conveyor section 52 from the binder supply 53. After passing through the press section 3, the main bed 33 is bound to the plate web 4, while the material of the edge beds 36, which contains no binder, is still loose and spreadable. This material can therefore, after leaving the press section 3, be returned to the supply 50 via the return conveyor sections 54 and be mixed with the main amount there. It therefore takes part in the production of the plate web 4 and does not circulate endlessly as a separate quantity only to form the edge beds 36.
  • the moisture content of the particles for the edge beds 36 can be adjusted, for example to a lower value, by moisture regulating devices 55 connected to the conveyor sections 51 independently of the moisture content of the particles for the main bed 33, so that at the edge not so much heat for the pure evaporation of existing moisture is lost and the desired temperature increase at the edge is easier to achieve.
EP88901546A 1987-02-17 1988-02-11 Verfahren und anlage zur herstellung von holzspanplatten und ähnlichen plattenwerkstoffen Expired - Lifetime EP0344192B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88901546T ATE69762T1 (de) 1987-02-17 1988-02-11 Verfahren und anlage zur herstellung von holzspanplatten und aehnlichen plattenwerkstoffen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3704940 1987-02-17
DE19873704940 DE3704940A1 (de) 1987-02-17 1987-02-17 Verfahren und anlage zur herstellung von holzspanplatten und aehnlichen plattenwerkstoffen

Publications (2)

Publication Number Publication Date
EP0344192A1 EP0344192A1 (de) 1989-12-06
EP0344192B1 true EP0344192B1 (de) 1991-11-27

Family

ID=6321140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88901546A Expired - Lifetime EP0344192B1 (de) 1987-02-17 1988-02-11 Verfahren und anlage zur herstellung von holzspanplatten und ähnlichen plattenwerkstoffen

Country Status (20)

Country Link
US (1) US5085812A (da)
EP (1) EP0344192B1 (da)
JP (1) JPH02502528A (da)
CN (1) CN1007604B (da)
AT (1) ATE69762T1 (da)
AU (1) AU605557B2 (da)
BR (1) BR8807362A (da)
CA (1) CA1305649C (da)
CS (1) CS277002B6 (da)
DD (1) DD271488A5 (da)
DE (2) DE3704940A1 (da)
DK (1) DK166570B1 (da)
ES (1) ES2006568A6 (da)
FI (1) FI87058C (da)
HU (1) HU202142B (da)
IN (1) IN170812B (da)
NO (1) NO169476C (da)
PL (1) PL159227B1 (da)
WO (1) WO1988006082A1 (da)
YU (2) YU30588A (da)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3904982C1 (da) * 1989-02-18 1990-02-01 Eduard Kuesters, Maschinenfabrik, Gmbh & Co Kg, 4150 Krefeld, De
DE4105615C1 (da) * 1991-02-22 1992-03-26 Eduard Kuesters Maschinenfabrik Gmbh & Co Kg, 4150 Krefeld, De
US5269982A (en) * 1992-02-12 1993-12-14 Brotz Gregory R Process for manufacturing a shaped product
IL106460A (en) * 1993-07-23 1997-09-30 Palboard Ltd Method of recycling plastic materials
DE19622279A1 (de) * 1996-06-03 1997-12-04 Dieffenbacher Gmbh Maschf Verfahren zur Herstellung von Spanplatten
ATA142496A (de) * 1996-08-07 2000-10-15 Danubia Petrochem Polymere Vorrichtung zum erhitzen von faserverstärkten thermoplasten mittels wärmekontakt
EP0857566A3 (de) * 1997-02-07 1999-02-03 Kvaerner Panel Systems GmbH Maschinen- und Anlagenbau Kontinuierlich arbeitende Presse
DE19749849B4 (de) * 1997-11-11 2005-02-03 Kvaerner Panel Systems Gmbh Maschinen- Und Anlagenbau Verfahren und Anlage zur Herstellung von einseitig oberflächenstrukturierten, plattenförmigen Verbundwerkstoffen
US6588772B2 (en) 2000-12-28 2003-07-08 The Burton Corporation Sintered sheet plastic material and gliding board base material
CN102390074B (zh) * 2011-10-21 2013-09-18 成都彩虹环保科技有限公司 纤维板成型装置
DE102014016867B3 (de) * 2014-11-14 2015-09-17 Siempelkamp Maschinen- Und Anlagenbau Gmbh Vorrichtung und Verfahren zur Behandlung von streufähigem Gut

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE861664C (de) * 1949-04-14 1953-01-05 Siegfried Schlosser Verfahren und Vorrichtung zur Herstellung von Leichtbauplatten
US2940135A (en) * 1953-01-30 1960-06-14 Weyerhaeuser Co Suction felter apparatus and method
DE1146242B (de) * 1956-06-12 1963-03-28 Matthias Weiss Verfahren zur Herstellung von Formkoerpern durch Plastizieren von zerkleinerten lignozellulosehaltigen Stoffen
DE1149159B (de) * 1958-01-11 1963-05-22 Franziska Pohl Geb Homey Verfahren und Vorrichtung zur Herstellung von Spanplatten
US3993426A (en) * 1971-11-22 1976-11-23 Eduard Kusters Continuous press having improved anti-friction rollers
DE2243465C3 (de) * 1972-09-04 1979-11-22 Kuesters, Eduard, 4150 Krefeld Kontinuierlich arbeitende Presse
SE379679B (da) * 1973-02-20 1975-10-20 Svenska Utvecklings Ab
US4038531A (en) * 1976-05-18 1977-07-26 Weyerhaeuser Company Process control apparatus for controlling a particleboard manufacturing system
DE2819943B2 (de) * 1978-05-06 1980-07-10 Kuesters, Eduard, 4150 Krefeld Formband für eine Presse zur Ausübung einer Flächenpressung
US4213928A (en) * 1978-06-19 1980-07-22 Kockums Industri Ab Method of making structural chipboard wood beam
SE419618B (sv) * 1979-12-12 1981-08-17 Kockums Ind Ab Kontinuerligt arbetande press
US4426340A (en) * 1981-09-29 1984-01-17 United Technologies Corporation Process for fabricating ribbed electrode substrates and other articles

Also Published As

Publication number Publication date
JPH02502528A (ja) 1990-08-16
NO169476C (no) 1992-07-01
YU30588A (en) 1990-04-30
BR8807362A (pt) 1990-03-13
NO884065L (no) 1988-09-13
IN170812B (da) 1992-05-23
DK569688A (da) 1988-10-13
CN88100765A (zh) 1988-08-31
DD271488A5 (de) 1989-09-06
CS98688A3 (en) 1992-06-17
DE3704940C2 (da) 1989-01-19
CA1305649C (en) 1992-07-28
DK166570B1 (da) 1993-06-14
FI893853A0 (fi) 1989-08-16
CN1007604B (zh) 1990-04-18
ATE69762T1 (de) 1991-12-15
HUT50692A (en) 1990-03-28
ES2006568A6 (es) 1989-05-01
PL159227B1 (pl) 1992-11-30
FI87058B (fi) 1992-08-14
PL270700A1 (en) 1988-12-08
YU84189A (sh) 1993-11-16
AU605557B2 (en) 1991-01-17
WO1988006082A1 (en) 1988-08-25
CS277002B6 (en) 1992-11-18
AU1295888A (en) 1988-09-14
EP0344192A1 (de) 1989-12-06
NO169476B (no) 1992-03-23
FI87058C (fi) 1992-11-25
NO884065D0 (no) 1988-09-13
DK569688D0 (da) 1988-10-13
HU202142B (en) 1991-02-28
DE3704940A1 (de) 1988-08-25
US5085812A (en) 1992-02-04
DE3866540D1 (de) 1992-01-09

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