EP1335819A1 - Tremie doseuse pour la production de panneaux de particules orientees - Google Patents

Tremie doseuse pour la production de panneaux de particules orientees

Info

Publication number
EP1335819A1
EP1335819A1 EP01976308A EP01976308A EP1335819A1 EP 1335819 A1 EP1335819 A1 EP 1335819A1 EP 01976308 A EP01976308 A EP 01976308A EP 01976308 A EP01976308 A EP 01976308A EP 1335819 A1 EP1335819 A1 EP 1335819A1
Authority
EP
European Patent Office
Prior art keywords
bunker
conveyor
dosing
belt
vertical
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.)
Granted
Application number
EP01976308A
Other languages
German (de)
English (en)
Other versions
EP1335819B1 (fr
Inventor
Matthias Graf
Lutz Wolf
Günter NATUS
Karl Heinz KÖHLER
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.)
Dieffenbacher GmbH and Co KG
Original Assignee
Dieffenbacher Schenck Panel GmbH
Dieffenbacher 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 Dieffenbacher Schenck Panel GmbH, Dieffenbacher GmbH and Co KG filed Critical Dieffenbacher Schenck Panel GmbH
Publication of EP1335819A1 publication Critical patent/EP1335819A1/fr
Application granted granted Critical
Publication of EP1335819B1 publication Critical patent/EP1335819B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B27N3/10—Moulding of mats
    • B27N3/14—Distributing or orienting the particles or fibres
    • B27N3/143—Orienting the particles or fibres
    • 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
    • B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres

Definitions

  • the invention relates to a dosing hopper for producing plates with oriented chips according to the preamble of patent claim 1.
  • OSB oriented structural board
  • LSL laminated strand lumber
  • the chips or wood chips (strands) used for this purpose ideally have a length-to-width ratio of 10: 1.
  • the elongated wood chips usually have lengths of 80 to 200 mm, a width of 10 to 40 mm and a thickness of 0.4 to 1 mm.
  • the wood chips are often introduced after gluing in almost conventional dosing bunkers for the production of conventional chipboard and only in the spreading head with special spreading devices are oriented on the forming tape.
  • Chipboard is known from the specialist book by Deppe / Ernst, Taschenbuch der Spanplatteentechnik, 3rd edition 1991, page 155.
  • a horizontal dosing hopper is shown there, in which the material flow is entered at the top via a screw conveyor. Distributed by a horizontal swiveling process
  • Screw conveyors continuously move the chips or chips over the entire width of the bunker.
  • a floor conveyor is provided on the bunker floor, to which the chips or wood chips are applied and which continuously conveys the entire chip layer to a discharge opening at a low feed rate.
  • a combing device is provided at the top of the bunker, by means of which a constant filling level is generated by scraping rakes.
  • discharge rollers are arranged over the entire height of the chute, which mill the chips or chips brought up through the base belt and convey them into the discharge opening to the spreading head.
  • Wood chips and another conveyor belt are provided for discharge, a uniform transverse distribution can not be achieved subsequently.
  • the invention is therefore based on the object of providing a metering bunker for producing OSB or LSL plates from which the most uniform discharge quantities can be discharged into the spreading head over the entire width.
  • the invention has the advantage that the pre-oriented transverse distribution in the dosing bunker forms a uniform supply quantity over the entire bunker width, which is available for discharge in the spreading head, which enables uniform distribution of the wood chips on a forming belt.
  • no special dissolving and leveling agents are necessary, so that evenly gentle material discharge into the spreading head can advantageously be achieved with simple conveying means.
  • the invention also has the advantage that the layered storage of the elongated wood chips in the dosing bunker and their unimpeded further transport hardly increases the proportion of fine material in the bunker, so that OSB or LSL boards with maximum strength values can be produced.
  • the invention is explained in more detail using an exemplary embodiment which is illustrated in the drawing. Show it:
  • FIG. 1 a vertical dosing hopper with a pre-orientation device and a swivel conveyor
  • FIG. 2 a horizontal dosing hopper with a pre-orientation device and a swivel conveyor.
  • a vertical metering bunker 1 with orientation rollers 7 as an orientation device and a swivel conveyor 4 with storage pockets 9 is shown schematically, which distributes the oriented elongated flat wood chips (strands) in a vertical filling space.3 evenly over the bunker width.
  • the invention proposes a metering bunker 1 with an oriented entry, so that the elongated wood chips in the metering bunker 1 are temporarily stored in ordered layers without any noteworthy density fluctuations and are therefore easily detachable and can be discharged evenly.
  • the elongated wood chips are therefore from a trough above the dosing hopper 1
  • Nes screw conveyor 5 first placed on two or more opening rollers 6, which are intended to dissolve any clumps or hooks.
  • coarse-meshed cage rollers or spiked rollers with a few elastic spikes are preferably provided, through which the loose wood chips can fall through almost without braking and without damage.
  • orientation rollers 7 are below the opening rollers 6 there are at least two orientation rollers 7, in the slots of which the elongated wood chips slide in transversely to the conveying direction.
  • the orientation rollers 7 consist of a continuous drive shaft, around which star plates are provided. The distances between the cross plates represent tapering slots that are only wide enough that the chips can only slide in transversely.
  • the orientation rollers 7 could also be arranged in the conveying direction, so that the elongated wood chips would be oriented lengthways. For longitudinal orientation, however, disk rollers can also be used, through the slots of which the elongated wood chips would be aligned in the longitudinal direction.
  • a swiveling conveyor belt 4 is arranged below the orienting rollers 7 as a swiveling conveyor, onto which the pre-oriented wood chips are fed by the orienting rollers 7.
  • the conveyor belt is provided with transverse webs 8 or transverse plates, which form conveyor pockets 9 between the individual webs 8.
  • the distances between the crosspieces 8 or cross plates are dimensioned such that the wood chips can only be inserted in their transverse orientation in the conveyor pockets 9, so that the transverse orientation on the swiveling conveyor belt 4 is maintained.
  • the conveyor belt could also be provided with longitudinal webs which only take up the wood chips in the longitudinal direction.
  • the swiveling conveyor belt 4 is pivotally and horizontally pivotable at its feed area and lowered obliquely downwards to the horizontal in the conveying direction.
  • the ejection end of the swiveling conveyor belt 4 is arranged so as to be immersed in the vertical filling space 3.
  • the swivel conveyor belt 4 is connected to a known swivel drive, not shown, which swivels the relatively narrow conveyor belt 4 of maximum 1 m width back and forth over the entire width of the bunker.
  • the bunker width corresponds approximately to the spreading width, which is usually two to four meters.
  • the transverse distribution of the elongated wood chips could also be carried out by a parallel conveyor, which is continuously moved back and forth across the bunker width parallel to the conveying direction.
  • This parallel conveyor could also be designed as a belt conveyor which would be mounted on its material feed side and its material discharge side so as to be transversely displaceable to the conveying direction.
  • Two parallel linear drives such as spindle drives could be connected to these bearing points, which continuously move the conveyor back and forth across the hopper width. Although this would be mechanically more complex, it would leave the deposit angle of the elongated wood chips unchanged over the course of the bunker width.
  • a belt scale 23 is provided in the swiveling conveyor belt 4, by means of which the conveying strength of the wood chips being conveyed is determined.
  • the transversely oriented wood chips can be deposited in a weight-metered manner over the entire width of the dox bunker 1 or the vertical filling space 3. It is envisaged that the same amount of wood chips should always be deposited over the entire width of the bunker so that the tikal filling room 3 is evenly filled.
  • a constant delivery rate (t / h) is therefore specified, at which the belt speed can be readjusted if there is a deviation from the target weight, the swiveling speed remaining constant.
  • a given delivery rate (t / h) could also be via the
  • Swivel speed can be regulated. Since the swiveling conveyor belt 4 is inclined in the conveying direction, the inclination of the conveyor belt 4 is detected by an inclination sensor in the case of the weight-metered discharge or is taken into account by calculation at a constant inclination angle. For this purpose, an evaluation device, not shown, is provided, by means of which both the belt loading and the belt speed are detected. If there is a deviation from the specified conveying strength or from the target weight, the belt speed of the conveyor belt 4 or the swiveling speed is adjusted accordingly.
  • the distance of the discharge point of the conveyor belt 4 from the deposit point in the vertical filling space 3 should not exceed a certain height distance. It is therefore provided that the swiveling conveyor belt 4 is adjustable in the conveying direction 10, so that it can plunge more or less deeply into the vertical filling space 3. This can be carried out in a simple manner with a lifting cylinder or a spindle drive. For this purpose, additional fill level sensors, not shown, are provided, which maintain a constant distance from the wood chip surface in the vertical fill chamber 3 by means of a program-controlled evaluation device.
  • the vertical filling chamber 3 consists in its filling area of an upper filling shaft 11, which consists of rigid parallel side walls 12, 25 which run across the entire width of the bunker. These are attached to the outside of the bunker wall and form a tightly enclosed one Filling space 11. Below this upper filling shaft 11 there is a vertical conveyor shaft 13, which essentially consists of two vertically arranged discharge conveyor belts 14, 15, which undergo a horizontal deflection 16, 20 in their lower area. These belts 14, 15 extend over the entire width of the bunker and, together with the end outer walls of the dosing bunker 1, form an enclosed conveyor shaft 13 which conveys the bunker contents continuously to a discharge opening 24.
  • the conveyor shaft 13 could, however, also be formed from only one discharge conveyor belt 14 and an opposite rigid side wall.
  • the two discharge belts 14, 15 are each an endless belt, which is arranged between three deflection rollers 16, 19, 20, which are arranged approximately like the end points of a right-angled triangle.
  • the two conveyor belts 14, 15 each connect to the lower point of the side walls 12, 25 of the upper filling shaft 11 and thus form its extension.
  • the two discharge belts 14, 15 are arranged so that they have different roller spacings.
  • the roller spacings are provided so that both a vertical 13 and a horizontal conveyor shaft 18 are formed between the two conveyor belts 14, 15.
  • the directed wood chips are conveyed to a discharge opening 24 in these deflected shafts 13, 18.
  • the vertical conveyor shaft 13 is designed as a clamping section in which the shaft can be narrowed downwards at least on an inner side surface. This is achieved in that the lower discharge belt 15 rests only loosely on its support rollers 17 and the shaft width is adjustable with a horizontally adjustable tensioning roller 16. Due to the narrowing of the shaft width, the layers of the oriented wood chips are clamped laterally so that they are carried along in the conveying direction by the movement of the discharge belts 14, 15 become. This also ensures that the individual
  • Layers in the lower region of the vertical conveyor shaft 13 are not significantly compressed by the fill level, so that an easily detachable bed in the vertical shaft 13 is retained.
  • the vertical conveyor shaft 13 can be closed in the deflection area with the aid of the tensioning roller 16 to such an extent that the two discharge belts 14, 15 lie slightly against one another with their inner walls. This prevents the newly filled wood chips from slipping through to the discharge opening 24. At the same time, the vertical shaft 13 is reduced to such an extent that the discharge height is only so great that an oriented depositing in the vertical conveyor shaft 13 is guaranteed.
  • the level is detected by the level sensors and transmitted to the evaluation device. This controls the tracking of the swivel conveyor belt 4 in the conveying direction 10, so that the distance to the fill level remains the same until a predetermined fill level is reached.
  • the belt tension is loosened by the adjustable tensioning roller 16 until a predetermined clamping effect is achieved.
  • the lower shaft width can be increased so that it corresponds to the shaft width of the upper filling shaft 11.
  • the material delivery rate to be filled is increased until an intended total filling height in the vertical filling chamber 3 is reached.
  • This set level is detected by the level sensors, the feed rate being regulated by the evaluation device when the set level is reached so that the bunker 1 is always filled up to the set level.
  • the level sensors can be arranged on the front of the bunker so that they also cross the level to the width of the bunker.
  • the swiveling conveyor belt 4 can also be arranged horizontally and transversely 26 to the width of the bunker and thus longitudinally to the forming belt so that a constant filling level can also be maintained transversely to the width of the bunker.
  • the lower tensioning roller 16 of the lower discharge belt 15 and the upper tensioning roller 20 of the upper discharge belt 14 deflect the vertical discharge flow into a horizontal discharge flow. This advantageously prevents the vertical material flow from slipping through to the discharge opening during discharge operation. At the same time, a loosening of the compaction effect is achieved, so that a gentle, uniform discharge into the spreading head is made possible.
  • the vertical filling space 3 could, however, also be formed by two parallel conveyor belts which are directed towards two horizontal conveyor belts which then form the horizontal filling shaft. However, a cellular wheel sluice could also be provided below the vertical filling space 13, through which the oriented wood chips are discharged into the spreading head in the manner of the orientation rollers.
  • the horizontal discharge stream in the horizontal conveyor shaft 18 represents a jamming-free filling section which forms a horizontal supply.
  • This horizontal filling section 18 primarily serves to bring about a uniform discharge behavior. This is achieved primarily by the fact that the deflection loosens the vertical stratification so that a uniformly removable material flow is established in the horizontal shaft 18.
  • the belt speed of the two discharge belts 14, 15 can be regulated.
  • the belt speed of both discharge belts is regulated so that they have a constant discharge Ensure the carrying speed in the shafts 13, 18 so that the pre-orientation is not changed and material circulation in the shafts 13, 18 does not occur if possible.
  • a belt scale 22 is preferably provided at the belt end of the horizontal conveyor shaft 18, by means of which the discharge quantity can be regulated via the discharge belt speed.
  • a knock-off roller 21 is additionally provided, which gently combs the oriented wood chips into the outlet opening 24 to the stray chamber.
  • the vertical bunker 1 ensures careful storage and even weight-metered discharge of the elongated wood chips, so that they can develop their maximum strength in the OSB or LSL panels to be spread and are not impaired by the fine material content that has arisen.
  • the entry device 2 arranged in the vertical bunker 1 could, however, also be provided in a separate device part above the bunker housing if this is possible and advantageously feasible for constructional reasons.
  • a horizontal bunker 30 with orientation rollers 7 as an orientation device and a swivel conveyor 4 with storage pockets 9 is shown schematically, which places the flat, elongated wood chips (strands) oriented on a horizontal filling section 32 evenly over the bunker width.
  • the horizontal bunker 30 essentially consists of an entry device 31 and a horizontal filling section 32, which is formed from a bottom belt 33.
  • a screw conveyor 5 is arranged, which feeds the glued elongated wood chips (strands) from a gluing mixer.
  • This screw conveyor 5 corresponds to the screw conveyor according to FIG. 1 of the drawing, wherein the same reference numerals have been used for the similar parts in FIG. 2 of the drawing.
  • the entry device 31 essentially consists of the orientation rollers 7 and a swivel conveyor 4.
  • the elongated wood chips for the production of OSB or LSL boards are first placed on at least two opening rollers 6 and the orientation rollers 7 arranged underneath.
  • the swivel conveyor 4, which is formed from a conveyor belt provided with pockets 9, is arranged below the orientation rollers 7.
  • a parallel conveyor could also be provided.
  • the horizontal bunker 30 extends over the entire width of the spreading head, which can be up to four meters.
  • the swivel conveyor 4 on the other hand, has a maximum width of only one meter and is continuously swung horizontally back and forth over the entire width of the dosing hopper 30 and thereby distributes the wood chips introduced uniformly over the width of the bunker 30.
  • the swiveling speed is a multiple of the discharge speed, so that the oriented wood chips are layered on top of each other.
  • the swivel conveyor 4 is arranged horizontally above the filling section 32 and conveys the oriented wood chips against the discharge direction 34 to the filling section.
  • the swivel conveyor 4 can also be inclined with respect to the horizontal, so that the oriented wood chips can be deposited in the lower region of the filling section 32 in the start-up mode.
  • fill level sensors (not shown) are provided, which record the fill height on the side surfaces across the bunker width.
  • the inclination of the swivel conveyor 4 can be readjusted by means of the fill level sensors and a predetermined distance from the fill height.
  • the swivel conveyor 4 is only readjusted until one predetermined target level in the bunker 30 is reached. After reaching this predetermined desired filling level, the bottom belt 33 can be controlled so that the filling layer is conveyed to the discharge opening 41.
  • the swivel conveyor 4 can also be arranged such that it is also adjustable in the conveying direction 34.
  • a spindle drive 42 is provided, through which the swivel conveyor 4 can be displaced longitudinally in the conveying direction 34.
  • a belt scale 24 is provided near the discharge end, which detects the amount of weight of the conveyed wood chips.
  • the belt speed is regulated so that the wood chips are distributed over the width of the dosing hopper 30 with a constant flow rate (t / h), so that, with a predeterminable discharge quantity, there is a uniform filling quantity on the filling section 32 over the entire floor belt width results.
  • a program or processor-controlled evaluation device is provided, as is used in known dosing belt scales.
  • the floor band 33 consists essentially of an elongated horizontal part 35 and a shortened vertical part
  • the bottom band 33 can be tensioned to different degrees.
  • the belt can be shortened so much during start-up operation that in the storage area 40 of the wood chips the loosely resting discharge belt 33 is so inclined relative to the vertical that the wood chips are largely oriented in the storage area 40 on the outlet Carrying strap 33 can be stored. This results in an orderly storage possibility in the horizontal bunker 30 even during the start-up operation, so that a uniform filling height with oriented wood chips builds up, which is then conveyed to the discharge opening 41 by means of a predetermined discharge speed.
  • a belt scale 22 is provided in the bottom belt 33 at the discharge end, with the aid of which a provided discharge amount can be regulated via the belt speed of the bottom belt.
  • the oriented and thus uniform entry of the elongated wood chips over the entire width of the bunker enables a uniform discharge into the spreading head without an additional volume-oriented transverse distribution in the dosing bunker 30 being necessary.
  • the discharge conveying strength of the swivel conveyor 4 or of the parallel dosing device can also be regulated via the discharge belt scale 22 by means of an evaluation device.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

L"invention concerne une trémie doseuse qui sert à produire des panneaux de particules orientées (OSB, LSL), qui est placée au-dessus d"une tête de pulvérisation et qui contient un dispositif (7) servant à préorienter les copeaux de bois plats et allongés. La trémie doseuse selon l"invention est caractérisée en ce qu"elle comprend, sous le dispositif de préorientation (7), un convoyeur orientable ou un convoyeur parallèle qui répartit les copeaux de bois préorientés, dans leur position préorientée, de manière continue sur toute la largeur de la trémie.
EP01976308A 2000-10-12 2001-10-12 Tremie doseuse pour la production de panneaux de particules orientees Expired - Lifetime EP1335819B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10050434 2000-10-12
DE10050434A DE10050434A1 (de) 2000-10-12 2000-10-12 Dosierbunker zur Herstellung von Platten mit orientierten Spänen
PCT/EP2001/011830 WO2002030641A1 (fr) 2000-10-12 2001-10-12 Tremie doseuse pour la production de panneaux de particules orientees

Publications (2)

Publication Number Publication Date
EP1335819A1 true EP1335819A1 (fr) 2003-08-20
EP1335819B1 EP1335819B1 (fr) 2004-12-22

Family

ID=7659465

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01976308A Expired - Lifetime EP1335819B1 (fr) 2000-10-12 2001-10-12 Tremie doseuse pour la production de panneaux de particules orientees

Country Status (5)

Country Link
US (1) US20040043096A1 (fr)
EP (1) EP1335819B1 (fr)
CA (1) CA2425652A1 (fr)
DE (2) DE10050434A1 (fr)
WO (1) WO2002030641A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070144663A1 (en) * 2005-12-23 2007-06-28 Huber Engineered Woods L.L.C. Process for manufacture of oriented strand lumber products
US20070151662A1 (en) * 2005-12-23 2007-07-05 Huber Engineered Woods L.L.C. Integrated process for simultaneous manufacture of oriented strand lumber and board products
US20080116039A1 (en) * 2006-11-22 2008-05-22 Ainsworth Lumber Co., Ltd. Material regulating devices and material delivery systems having those devices
US8783438B2 (en) 2012-11-30 2014-07-22 Heb Grocery Company, L.P. Diverter arm for retail checkstand and retail checkstands and methods incorporating same
HU230408B1 (hu) * 2013-06-19 2016-04-28 Rapidsil System Kft. Rétegezett hőszigetelő elem, valamint berendezés és eljárás rétegezett hőszigetelő elem előállítására
JP6512396B2 (ja) * 2015-01-29 2019-05-15 セイコーエプソン株式会社 シート製造装置およびシート製造方法
CN113427593B (zh) * 2021-06-28 2022-11-04 寿光市鲁丽木业股份有限公司 一种刨花板铺装成型预压系统

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DE19511414A1 (de) * 1995-03-28 1996-10-02 Baehre & Greten Dosierbunker für schüttfähige Teilchen organischer und/oder anorganischer Herkunft
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DE19916447A1 (de) * 1999-04-12 2000-10-19 Dieffenbacher Schenck Panel Formstation
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Also Published As

Publication number Publication date
DE50104911D1 (de) 2005-01-27
EP1335819B1 (fr) 2004-12-22
DE10050434A1 (de) 2002-04-25
CA2425652A1 (fr) 2003-04-14
WO2002030641A1 (fr) 2002-04-18
US20040043096A1 (en) 2004-03-04

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