EP2480388A1 - Procédé de production de panneaux de fibres de type carton en fibres de bois - Google Patents

Procédé de production de panneaux de fibres de type carton en fibres de bois

Info

Publication number
EP2480388A1
EP2480388A1 EP10763160A EP10763160A EP2480388A1 EP 2480388 A1 EP2480388 A1 EP 2480388A1 EP 10763160 A EP10763160 A EP 10763160A EP 10763160 A EP10763160 A EP 10763160A EP 2480388 A1 EP2480388 A1 EP 2480388A1
Authority
EP
European Patent Office
Prior art keywords
fibers
produced
glued
fiber
binder
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.)
Withdrawn
Application number
EP10763160A
Other languages
German (de)
English (en)
Inventor
Michael SCHÖLER
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.)
Siempelkamp Maschinen und Anlagenbau GmbH and Co KG
Original Assignee
Siempelkamp Maschinen und Anlagenbau 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 Siempelkamp Maschinen und Anlagenbau GmbH and Co KG filed Critical Siempelkamp Maschinen und Anlagenbau GmbH and Co KG
Publication of EP2480388A1 publication Critical patent/EP2480388A1/fr
Withdrawn legal-status Critical Current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
    • B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from 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
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent
    • 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 for the production of cardboard-like fiberboard or fiberboard strands of wood fibers.
  • MDF panels medium density fiber
  • wood fibers are produced from lignocellulosic material (i.e., from wood or wood particles) and these wood fibers are glued with a binder, e.g. B. by way of blow-line gluing.
  • a fiber mat is produced from the glued wood fibers on a spreading belt conveyor. This fiber mat is optionally precompressed and then in a continuously operating press, z. B. a double belt press using pressure and heat to a wood-based panel or a wood-based panel strand pressed.
  • cardboard z. B. for the packaging industry.
  • the production of cardboard or cardboard essentially corresponds to the production of paper. From wood cellulosic material or pulp is first obtained, which is mixed with a considerable proportion of water and additives to a pulp.
  • the conventional production of cardboard thus requires a high water use. This is associated with high costs and incidentally also disadvantageous from an environmental point of view.
  • the invention has for its object to provide a method by which can be created in a simple and cost-effective manner versatile high-quality fiberboard.
  • the invention teaches a method for producing cardboard-like fiberboard or fiberboard strands of wood fibers, - wherein wood fibers are glued with a binder, wherein from the glued with the binder wood fibers by means of a Siebstreukopfes a fiber mat is produced on a scatter belt conveyor, wherein the Siebstreukopf a Siebêt- surface and a plurality of distribution elements above the Siebêt setup, and wherein preferably on the opposite side of the Siebêt procedure Siebband makeupers at least one suction device is arranged, - wherein the fiber mat produced in this way in a continuous press using pressure and heat is pressed at a temperature of 120 ° C to 220 ° C and a pressure of 15 bar to 50 bar to a fiberboard or to a fiberboard strand with a thickness of up to 3 mm.
  • binder z As synthetic resins, preferably urea resins, melamine resins, phenolic resins are used. Alternatively, isocyanates can be used. Consequently, it is possible to resort to the resins known for wood-based panel production. Alternatively, however, can be used on known from the paper industry sizing, z. B. ready-to-use Harzleimdispersionen such.
  • alkyl ketene dimer dispersions (AKD) or alkenyl succinic anhydride (ASA) polymer sizing of styrene acrylic acid or styrene maleic acid and polyurethane dispersions or starch or dextrin or polyamines or acrylates.
  • the invention is based on the recognition that can be produced in the manner described thin wood-based panels, namely wood fiber panels made of wood fibers, whose properties correspond to those of cardboard or cardboard materials or at least come very close.
  • the fiberboards produced in the context of the invention can consequently be used as packaging material, such as cardboard.
  • the advantage here is the fact that can be dispensed with in the course of production on the use of considerable amounts of water.
  • Siebstreuters are generally known, for. Example from WO 03/053642 A1.
  • Such Siebstreukopf has a plurality of spaced at a predetermined distance above the sieve bottom surface distribution elements, for. B. stirring elements.
  • the scattering head has z. B. a plurality of in the conveying direction or running direction of the scatter band conveyor successively arranged rows each having a plurality of transversely to the conveying direction or running direction of the scatter band conveyor arranged stirring elements.
  • the stirring elements each have at least one agitating blade with a predetermined stirring width, which can be rotated about an axis which is approximately perpendicular to the sieve bottom surface. It may be expedient if the stirring elements of a row rotate in the same direction and / or if the stirring elements of respectively adjacent rows rotate in the opposite direction.
  • each suction box is particularly advantageously arranged on the side of the scatter band conveyor which is opposite the sieve bottom surface. It can also be provided several suction boxes, namely z. B. a plurality of in the strip running direction successively arranged suction boxes, the each extending substantially transverse to the direction of tape travel. The individual suction boxes can be connected to one or more suction lines in order to adjust the suction of the individual suction boxes.
  • the scattering head can end a transversely to the conveying direction or strip running direction extending discharge device, for. B. have a discharge screw or a suction device for coarse material and / or excess material, which can be supplied to the bunker again.
  • pre-shredded wood or lignocellulosic material is preferably softened by boiling and then disrupted by grinding into fibers in a comminuting device. It may be appropriate to subject the pre-shredded material before the cooking process of preheating.
  • the pre-shredded material can be fed by means of a plug screw against back pressure in the downstream digester.
  • the plug screw can be at a speed of only about 15 to 20, z. B. 19 U / min operated.
  • the said backpressure in the plug screw can be used for dewatering the product.
  • the back pressure can be about 6 to 8 bar, z. B. 7 bar adjustable.
  • a feed screw can be used to transport the softened in the digester material in the grinding zone.
  • This feed screw can with a number of revolutions of about 500 to 700, z. B. 600 U / min operated.
  • a refiner can be used, which is operated at speeds of 1500 to 3600. In the refiner, an internal pressure of about 6 to 7 bar, z. B. be maintained at 6.8 bar.
  • the gluing can z. B. in a so-called. "Blowline” done.
  • the binder is applied to the emerging from the crushing device due to the expanding steam fibers, z. B. sprayed.
  • the fibers are thus removed with the aid of the grinding process in the comminuting direction (Refiner) resulting expanding steam pneumatically promoted by the "Blowline” while applying the binder, z. B. sprayed.
  • the gluing of the fibers can alternatively take place in the course of (further) pneumatic transport. So the gluing z. B. in a delivery line, in which the fibers are conveyed pneumatically.
  • a gluing device it is possible to glue the fibers in a chute, as described, for example, in DE 10 2006 058 625 B3, DE 10 2006 058 626 B3 or DE 10 2006 058 627 B3.
  • the fibers are fed pneumatically in a fiber feed line to a vertically arranged chute.
  • a gluing device is arranged with a plurality of spray nozzles surrounding the fiber stream for spraying the fibers emerging from a fiber outlet tube and entering the chute with glue drops.
  • the chute is arranged downstream of a collecting device for collecting and discharging the glued fibers. This collecting device has z.
  • the gluing can also take place in a continuously operating mixer which has at least one mixing chamber and one or more mixing tools attached to a rotating mixer shaft, the mixing tools mixing the fibers with the binder and conveying them in a conveying direction through the mixer or the mixing chamber.
  • a continuously operating mixer which has at least one mixing chamber and one or more mixing tools attached to a rotating mixer shaft, the mixing tools mixing the fibers with the binder and conveying them in a conveying direction through the mixer or the mixing chamber.
  • Such mixers are also referred to as gluing mixers.
  • the mixing chamber is usually cylindrical as a drum trained, but this drum does not rotate, but is usually fixed.
  • the mixing chamber has at least one loading opening for the fibers and at least one discharge opening for the fiber-binder mixture and a plurality of binder feed openings, for. B. binder feed tubes for the supply of the binder.
  • the binder supply can be done via the mixing tools or via projecting into the interior of the mixing chamber feed tubes.
  • Such mixers are known in principle. In principle, however, other gluing devices can also be used within the scope of the invention. In any case, it is expedient to produce glued fibers with a residual moisture of 5% to 20%, preferably 6% to 18%. If the fibers in the course of Beieimens have a higher residual moisture, the fibers are dried to this residual moisture.
  • the proportion of the binder based on the total weight of the glued fibers is preferably 1% to 12%.
  • fiberboard with a thickness of 0.1 mm to 3 mm, z. B. 0.1 mm to 1, 5 mm produced.
  • the basis weight of the fibreboards preferably produced is about 0.1 kg / m 2 to 3 kg / m 2 , preferably 0.1 kg / m 2 to 1, 5 kg / m 2 .
  • the scattering with the spreading head it is possible by means of the scattering with the spreading head to influence the mechanical properties, such as tensile strength or bending rigidity, in a targeted manner.
  • the mechanical properties of the fiberboard such as tensile strength or bending stiffness in the longitudinal and transverse directions provide substantially identical.
  • the pressed plates consequently have the same tensile strength and / or bending stiffness in the longitudinal direction and in the transverse direction.
  • the mechanical properties such as tensile strength and / or bending stiffness in the longitudinal and transverse direction by targeted influencing of the scattering, preferably in a ratio of up to 2: 1, particularly preferably up to 1.5: 1.
  • the plates consequently have a higher tensile strength and bending stiffness in the longitudinal direction than in the transverse direction.
  • the invention relates to a packaging carton made of one or more fibreboards, prepared by the described method.
  • the use of the fibreboards produced in the context of the invention as packaging material for the production of packaging carton constructions is consequently of particular importance in the context of the invention.
  • the fiberboards produced according to the invention can be excellently punched, folded, folded and folded so that packaging cartonages can be produced in a simple and cost-effective manner from the fibreboards, which are essentially produced from wood fibers.
  • the properties of these packaging cartons are comparable to conventional cardboard based cartons.
  • FIG. 1 In a schematic representation of the invention
  • Fig. 2 shows a preferably usable scattering head for generating
  • FIG. 3 a detail of a plan view of the object according to FIG. 2.
  • FIG. 1 schematically shows a method and / or a plant for the production according to the invention of thin fiberboards, which-like cardboard-can be used for packaging purposes.
  • crushed material namely lignocellulosic material or a wood material 21 is fed by means of a metering and feeding device 22 to a digester 23, in which the material 21 is softened.
  • the softened material in a crushing device, for. B. a refiner 24 crushed.
  • a steam outlet 28 which leads either to the atmosphere or to an aftertreatment device.
  • the cyclone 27 is sealed down by a rotary valve 29, which allows a metered Faseraustrag.
  • a gas stream produced by a hot gas generator 30 then transports the discharged from the rotary valve 29 fibers to a dry fiber cyclone 32, wherein the fibers are dried on their transport path 31 to a predetermined residual moisture, depending on the binder used between z. B. 6% and 18% may be.
  • a plurality of dry fiber cyclones 32 whose vapor outlet is indicated by the arrow 33. Basically, the vapors can be discharged into the environment.
  • the dry fiber cyclone 32 is also closed at the bottom by a rotary valve 34, via which the dry fibers are fed to a dry fiber bunker 35. From the dry fiber bunker 35, the fibers pass through a dissolving device 36 to a spreader 37.
  • the spreader 37 generates with support of a Suction device 38 on a rotating scattering belt 39, a fiber mat or a fiber fleece M. This fiber fleece M can optionally be precompressed by a supercharger 40.
  • the mat M then runs in a continuous press 41 and there, using pressure and heat, the fiber mat is pressed into a fiberboard or fiberboard strand.
  • the fiber mat is pressed into a fiberboard or fiberboard strand.
  • the material produced in this way can preferably be used as packaging material, much like cardboard.
  • the dosing unit 3 consists essentially of a dosing belt 4 and a plurality of metering and / or opening rollers 5.
  • the bunker or distributor belt 6 is supplied to the bunker or the metering and / or opening rollers 5 via a bunker belt or distributor belt 6, which essentially dissolve spreading material compactions.
  • a bunker filling is indicated schematically in Fig. 1 above the metering belt.
  • the discharge quantity of the dosing belt bunker or the dosing unit can be varied essentially by lowering or increasing the speed of the dosing belt 4.
  • the spreading material is scattered onto a spreading head adjoining the dosing unit 3 at the end and arranged above the scatter band conveyor 1 (or 39) and consequently onto the spreading machine 7.
  • the scattering head 7, which is provided in Fig. 1 by the reference numeral 37, according to the invention as Siebstreukopf 7 with a sieve bottom surface 8 is formed in a plurality of at a predetermined distance above the sieve bottom surface 8 arranged stirring elements 9 with predetermined stirring width B.
  • the stirring elements 9 are arranged in a housing 10, whose housing underside forms the sieve bottom surface 8 or on the underside of which the sieve bottom surface 8 is arranged. According to FIG.
  • the scattering head 7 has a plurality of rows 1 1 arranged one behind the other in the conveying direction F, each having a plurality of stirring elements 9 arranged transversely to the conveying direction F.
  • the conveying direction F is meant the running direction of the scatter band conveyor 1, ie the strip running direction, which corresponds essentially to the running direction of the dosing belt 4.
  • the individual agitating elements 9 each have at least one agitating blade 13 with a predetermined stirring width B which is rotatable about an axis 12 arranged approximately perpendicular to the sieve bottom surface 8.
  • the stirring blades are z. B. each one-piece and rod-shaped with rectangular or square cross-section.
  • These stirring vanes 13 rotate in a common plane which extends substantially parallel to the sieve bottom surface 8, directly above the sieve bottom surface 8.
  • the stirring vanes 13 may be designed as double vanes with an overall blade length corresponding to the stirring width B.
  • the stirring elements 9 rotate in a row 1 1 in the operation of the system in the same direction.
  • the stirring elements 9 each rotate adjacent rows 1 1 in the operation of the system in the opposite direction.
  • the distance A of two adjacent stirring elements 9 of a row 1 1 corresponds approximately to the stirring width B of the stirring elements, wherein with the distance A of these stirring elements 9, the distance between the axes 12 is meant.
  • At least one suction box 15 is arranged on the side opposite the sieve bottom surface of the scatter belt conveyor 1, that is below the scatter belt conveyor 1, which generates an air flow directed from the sieve bottom surface 8 onto the scatter belt conveyor 1 and thus sucks the spreading material onto the scatter belt conveyor or the sieve belt.
  • this is indicated by the reference numeral 38. It is possible to provide a uniform suction box whose length and width corresponds approximately to the length and width of the scattering head.
  • Fig. 2 a preferred embodiment with a plurality of suction boxes 15 is shown, which extend substantially transversely to the strip running direction.
  • One or more suction lines can be connected to the individual suction boxes 15, wherein the suction effect of the individual suction lines or suction boxes, z. B. is adjustable via throttle. This makes it possible to adjust the suction effect of the suction boxes of the entire suction assembly over the length and / or across the width and adapt to the requirements.
  • each two adjacent stirring elements 9 in a row 1 1 and in the edge regions of the scattering head separating or side walls 17 may be arranged, which extend from row to row over substantially the entire length of the scattering head 7 and substantially in Form conveying direction extending conveying channels 18.
  • the partitions 17 are adapted in shape to the shape and position of the stirring elements 9, so that form quasi-like or serpentine conveying channels 18 because of the staggered row arrangement in the plan view. Consequently, the spreading material is wavy transported in the individual conveying channels 18 in plan view, so that there is a particularly homogeneous spreading material distribution, both in the conveying direction F and across the Conveying direction F comes. Furthermore, it is indicated in some regions in FIG. 3 that covering segments 20 are connected to the partitions 17 in the region of the stirring surface interspaces 19, which substantially cover or fill the stirring surface interspaces 19.
  • the scattering head 7 has at its end a discharge device 16 extending transversely to the conveying direction F or running direction of the scattering belt conveyor 1 for residual chips or coarse material and excess material.
  • This discharge device is merely indicated and formed in the embodiment as a discharge screw 16.
  • the preferred scattering head is particularly well suited to influence the mechanical properties of the plates targeted, z. B. adjust the mechanical properties in longitudinal and transverse directions the same or different.
  • blow-line gluing illustrated in FIG. 1, it is possible within the scope of the invention to provide gluing during the pneumatic fiber transport, for B. in a transport line or a chute gluing. It is also possible to glue the fibers in a mixer with mixing chamber and mixer shaft and mixing tools.

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)

Abstract

L'invention concerne un procédé pour produire des panneaux de fibres ou une bande continue de panneaux de fibres de type carton, à base de fibres de bois, caractérisé en ce que les fibres de bois sont encollées avec un liant, un matelas de fibres de bois encollées avec le liant est formé sur un convoyeur de bande de formage au moyen d'une tête de distribution à tamis, la tête de distribution à tamis comporte une surface de fond à tamis et une pluralité d'éléments répartiteurs, un dispositif d'aspiration est placé sur la face opposée du convoyeur de bande de formage, et le matelas de fibres formé de cette manière est pressé dans une presse continue par application de pression et de chaleur, à une température de 120 °C à 220°C et à une pression de 15 bar à 50 bar, pour donner une bande de panneaux de fibres d'une épaisseur allant jusqu'à 3 mm.
EP10763160A 2009-09-23 2010-09-23 Procédé de production de panneaux de fibres de type carton en fibres de bois Withdrawn EP2480388A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910042361 DE102009042361B4 (de) 2009-09-23 2009-09-23 Verfahren zur Herstellung von kartonähnlichen Faserplatten aus Holzfasern
PCT/EP2010/064036 WO2011036200A1 (fr) 2009-09-23 2010-09-23 Procédé de production de panneaux de fibres de type carton en fibres de bois

Publications (1)

Publication Number Publication Date
EP2480388A1 true EP2480388A1 (fr) 2012-08-01

Family

ID=43416955

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10763160A Withdrawn EP2480388A1 (fr) 2009-09-23 2010-09-23 Procédé de production de panneaux de fibres de type carton en fibres de bois

Country Status (4)

Country Link
EP (1) EP2480388A1 (fr)
CN (1) CN102712100A (fr)
DE (1) DE102009042361B4 (fr)
WO (1) WO2011036200A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102016112802A1 (de) * 2016-07-12 2018-01-18 Dieffenbacher GmbH Maschinen- und Anlagenbau Streukopf und Verfahren zur Herstellung einer Schicht einer Streugutmatte aus streufähigem Material im Zuge der Herstellung von Werkstoffplatten
CN108442171A (zh) * 2018-03-22 2018-08-24 哈尔滨工业大学 一种以秸秆为原料制备的瓦楞纸芯材料及方法
SE543038C2 (en) * 2018-04-24 2020-09-29 Ikea Supply Ag Fiberboard and method of forming a fiberboard
CN108943315B (zh) * 2018-07-10 2020-12-04 徐州志远食品有限公司 一种秸秆板块生产系统
CN113400434A (zh) * 2021-06-08 2021-09-17 大连塑研塑料科技开发有限公司 一种长纤维秸秆板材的连续挤压成型设备及其制备方法
WO2023156458A2 (fr) * 2022-02-16 2023-08-24 Ikea Supply Ag Station de formage et de pré-pressage pour former un panneau de fibres à partir de fibres lignocellulosiques

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Also Published As

Publication number Publication date
WO2011036200A1 (fr) 2011-03-31
DE102009042361B4 (de) 2012-12-20
CN102712100A (zh) 2012-10-03
DE102009042361A1 (de) 2011-04-14

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