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EP0330671A1 - Insulating board containing natural fibres, process and device for its production. - Google Patents

Insulating board containing natural fibres, process and device for its production.

Info

Publication number
EP0330671A1
EP0330671A1 EP87907930A EP87907930A EP0330671A1 EP 0330671 A1 EP0330671 A1 EP 0330671A1 EP 87907930 A EP87907930 A EP 87907930A EP 87907930 A EP87907930 A EP 87907930A EP 0330671 A1 EP0330671 A1 EP 0330671A1
Authority
EP
European Patent Office
Prior art keywords
paper
glue
mixture
fibers
air
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
EP87907930A
Other languages
German (de)
French (fr)
Other versions
EP0330671B1 (en
Inventor
Uwe Welteke
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT87907930T priority Critical patent/ATE84588T1/en
Publication of EP0330671A1 publication Critical patent/EP0330671A1/en
Application granted granted Critical
Publication of EP0330671B1 publication Critical patent/EP0330671B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
    • E04C2/16—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of fibres, chips, vegetable stems, or the like
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31971—Of carbohydrate
    • Y10T428/31993—Of paper

Definitions

  • the present invention consists in a thermal insulation board made of ground paper in a mixture with natural fibers such as jute or the like.
  • a thermal insulation board is e.g. described in the unpublished German patent application P 35 45 00.
  • thermal insulation boards have at most an insignificant amount of synthetic chemicals, they are therefore particularly environmentally friendly and meet modern building biological requirements.
  • the present invention therefore has the task of improving such thermal insulation boards, in particular to increase their mechanical strength, to incorporate the fibers in a more durable manner and to create a method and an apparatus therefor, with the aid of which such plates can be produced.
  • the thermal insulation board according to the invention is obtained from a mixture of shredded flakes with an edge length of 1 to 5 mm and with decay-inhibiting additives, such as preferably borates, pretreated newspaper or the like, paper free of surface coatings or fillers and natural fibers, preferably an edge length of five up to one hundred and glues and / or reaction aids, preferably of vegetable origin. It has surprisingly been found through tests that the edge length and the quality of the end product
  • the form of the paper used has a decisive influence.
  • the nature of the natural fibers to be used is largely uncritical with regard to their nature, in particular jute, sisal, cotton, coconut, flax, those made from recycling or waste material from spinning mills or processed material made from straw or wood or animal hair, such as preferably wool, preferably one Length from 5 to 100 mm.
  • Balsam resins such as Kolophoniu starch or lignin glue, rubber or also road cement, gypsum aluminum sulfate and water glass are preferably used as glues and reaction aids.
  • the plates can be produced in such a way that the substances are mixed and loosened, placed in a mold, compressed to the desired density and treated with hot air and / or superheated steam and dried.
  • the lignin components contained in the paper are activated and used as binders.
  • a particularly effective method according to the invention consists in first premixing paper flakes and fibers, blowing the mixture into a mixing vessel and glue or glue and reaction helix, optionally in the form of an aqueous solution, in countercurrent thereafter, loosening the mixture, in a free case into one Formation station brings and compressed and then treated with hot air or hot air and steam and dried.
  • the glues and optionally reaction aids can be injected in powder form, in melted form or as an aqueous solution into the flock and fiber stream and essentially settle on the surfaces of the particles.
  • the desired alignment of the fibers and the interlocking or filing of the fibers and flakes is achieved by compacting to plate form, which improve the bond and reduce the need for glue.
  • the compacted mass is then treated with hot air or hot air and steam, causing the glue components to flow and then set.
  • the loosening and separation of the components before they are introduced into the mold is of major importance. It is therefore further proposed to collect (continuously) the mixture of components produced by countercurrent in a container provided with a loosening mixing element, to discharge it into a chute with the aid of a lock, preferably a cellular wheel lock, and to mix the mixture there again and to loosen up.
  • a lock preferably a cellular wheel lock
  • the "setting" of the plates takes place under mechanical pressure, passing hot steam or hot air or both, depending on the moisture present and required for the activation of the glues used, through the pressed material under excess pressure and then drying, which e.g. can be done by passing dry air, which can also be sucked through to generate a negative pressure and to accelerate evaporation.
  • the process can be varied during filling such that different mixtures are produced in separate mixing devices and these are successively layered on top of one another and then pressed.
  • the outer layer can have higher proportions of glue and paper in order to make them smoother or to cover them with the aid of the glue, or, depending on the application, can also contain longer or shorter fiber proportions.
  • it is proposed to put the material trickling out of the chute onto a (perforated) conveyor belt, to which a perforated belt (top belt) running at the top is assigned the plate thickness is reduced and runs into the hot steam and / or hot air supply and the drying station.
  • the product to be compacted also be guided laterally, for example by its own belts.
  • the device according to the invention consists of a cyclone with an upper tangential feed of the fiber / flake mixture and opposite counter-current input of the glue components.
  • the mixture rotates peripherally and reaches the bottom of the cyclone where it is collected and monitored by a level indicator. Filter bags are provided on the top for dust removal.
  • Rotating comb tine shafts are arranged in the collecting area, underneath there is a rotary valve which doses the material to another mixing element, whereby it can be used if necessary. Below the latter mixing element there is a chute and below this the filling station, and stripping shafts can be provided at the outlet.
  • the cyclone 1 has two mutually directed, approximately tangential material inputs, the feed 2 for the premix of paper flakes and natural fibers.
  • This premix contains the essential substances, ie in addition to the fibers and paper flock, for example also the putrefactive substances which can be added to the paper during grinding.
  • the pressure nozzle 3 With the help of the pressure nozzle 3, the lei is blown into the rotating mixture in powder form or as a melt or in aqueous solution.
  • the " storage container 4 with mixer 5 and the dosing container 6 with screw discharge 7 are used to produce the glue.
  • the screw discharge is followed by a pressure sprayer 8, which opens into the pressure nozzle 3.
  • the material is preferably fed in at low air, for which purpose Devices exist.
  • the excess pressure generated by the material input in the interior of the cyclone 1 serves at the same time for dedusting by the filter bags 9 at the top of the cyclone 1.
  • the cyclone is equipped with a fill level control 11, which throttles the material supply before being overloaded.
  • Mixing elements in the form of comb tine shafts 10 are arranged on the bottom of the cyclone 1, which homogenize the material and prevent premature setting of the glue by constant movement.
  • a lock preferably a pin wheel lock 12, which doses the material into the chute 13.
  • Evaporation 14 can be provided below the cellular wheel sluice, which serves to pre-swell and stretch the fibers.
  • This chute 13 is preferably designed to expand downward in order to prevent caking of glue components when the addition is dissolved or melted.
  • a fill level control 15 and underneath it the molding station, which is designed here as a plurality of molding boxes 16 open at the top. The material flows into these boxes 16 in a completely loosened state.
  • the boxes 16 are slidably mounted. After a box has been filled, it arrives at a press 17, which compresses the loose bed to the desired density.
  • the press consists in a simple manner of a perforated sheet, just like the molded boxes, which is adapted to the dimensions of the boxes and which is placed on the filling and pressed down.
  • the perforated sheet can remain on the box until it is removed from the mold, but it is also possible to apply separate perforated sheets in the subsequent stages for holding down and setting. This creates the desired orientation and entanglement of the fibers, which mechanically strengthens the bond.
  • scraper shafts 18 can be arranged, which ensure a uniform degree of filling.
  • the device should therefore preferably be started up and kept in operation continuously.
  • the temperature and moisture treatment stages follow the press 17. First, hot air and hot steam can be blown in to activate the glue and the activatable lignin components 19.
  • compressed air 20 can be blown in for drying and then in a further stage 21 either further drying air can be supplied, the exhaust air of which can be used for pre-drying in 20, or it can also be dried to residual building physics with the help of vacuum in 21.
  • the mold boxes are circulated after removal from the mold.
  • the degree of filling can be regulated via the scraper shafts 18 if they are height-adjustable.
  • the temperature and humidity control is preferably carried out as follows:
  • a mixture of hot air and superheated steam is driven in through the openings in the perforated plate below, the temperature and mixing ratio of which can be regulated.
  • the gas mixture is fed into the mold until the material is heated to just below the boiling point of the liquid it contains.
  • the moisture must be sufficient to enable the setting and reaction specifications, including the reactivation of the glues contained in the paper
  • the renewed evaporation of the moisture is brought about by throttling the supply of hot air from the base element and, if necessary, by additional heating, and the resulting vapor / air mixture is sucked off through the drying plate body into the suction cover - negative pressure.
  • the drying process of the plates does not take so long until the moisture also passes from the inside of the plate through the salts and fiber materials to the outside. diffused, but is carried out of the plate much faster by the air flow, which also brings evaporation energy with it.
  • Another part of the evaporation energy is contributed by controlling the pressure in the closed form.
  • a moisture residue that slightly exceeds the building moisture (approx. 10% weight moisture) can remain in the plate. As soon as the moisture has dropped so far, the plate can be dried and switched off and packed.
  • Treatment of the moist plate with hot air can be used if the post-curing of certain adhesives, e.g. Effect lignin glue.
  • the energy management of the gas central system can be optimized by minimizing heat losses through thermal insulation of the temperature-conducting pipes and surfaces and good seals, as well as recovering heat from the post-drying of the plates, the heat of condensation from the moist drying exhaust air and the superheated steam-hot air excess from steaming.
  • the vaporization mixture can also be obtained by reheating the moist drying exhaust air (containing steam) and thus the moisture can be circulated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Paper (AREA)
  • Inorganic Insulating Materials (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)

Abstract

(A) A novel heat insulating board consists of a mixt. of (i) paper (e.g. newspaper) which is free of surface coatings and fillers, has been comminuted to flakes of 1-5mm edge length and has been pretreated with anti-rot additives (pref. borates); (ii) natural fibres pref. of 5-100 mm length, and (iii) glues and/or reaction promoters, pref. of vegetable origin. (B) Prodn. of the board comprises pre-mixing the paper flakes and fibres, blowing the mixt. into a mixer vessel, introducing glue and opt. reaction promoter (opt. in the form of an aq. soln.) in countercurrent to the mixt., loosening the mixt. dropping the mixt. into a moulding station, compacting, treating with hot air and opt. steam, and drying. (C) Appts. for carrying out the process is also claimed.

Description

Naturfasern enthaltende Wärmedämmplatte sowie Verfahren und Vorrichtung für ihre Herstellung Thermal insulation board containing natural fibers and method and device for their production
Die vorliegende Erfindung besteht in einer Wärmedämmplatte aus vermahlenem Papier in einer Mischung mit Naturfasern wie Jute oder dergleichen. Eine derartige Wärmedämmplatte ist z.B. in d nicht vorveröffentlichten Deutschen Patentanmeldung P 35 45 00 beschrieben.The present invention consists in a thermal insulation board made of ground paper in a mixture with natural fibers such as jute or the like. Such a thermal insulation board is e.g. described in the unpublished German patent application P 35 45 00.
Derartige Wärmedämmplatten weisen höchstens unwesentliche Ante an synthetischen Chemikalien auf, sie sind daher besonders umweltfreundlich und erfüllen moderne baubiologische Erforder¬ nisse.Such thermal insulation boards have at most an insignificant amount of synthetic chemicals, they are therefore particularly environmentally friendly and meet modern building biological requirements.
Ein wesentliches Problem bei der Herstellung sind die bisher nicht vermeidbaren Inhomogenitäten im Endprodukt, die einmal d mechanische Festigkeit beeinträchtigen, zum anderen aber auch eine Auflösung des Verbundes bei Lagerung und Transport bewirk Die vorliegende Erfindung hat sich daher die Aufgabe gestellt, derartige Wärmedämmplatten zu verbessern, insbesondere ihre mechanische Festigkeit zu Erhöhen, die Fasern haltbarer einzubinden und ein Verfahren sowie eine Vorrichtung hierfür z schaffen, mit deren Hilfe derartige Platten herstellbar sind.A major problem in the manufacture are the previously unavoidable inhomogeneities in the end product, which on the one hand impair the mechanical strength and on the other hand also cause the bond to dissolve during storage and transport. The present invention therefore has the task of improving such thermal insulation boards, in particular to increase their mechanical strength, to incorporate the fibers in a more durable manner and to create a method and an apparatus therefor, with the aid of which such plates can be produced.
Die erfindungsgemäße Wärmedämmplatte wird erhalten aus einer Mischung aus auf Flocken von 1 bis 5 mm Kantenlänge zerkleiner und mit fäulnishemmenden Zusätzen, wie vorzugsweise Boraten, vorbehandeltem Zeitungs- oder ähnlichem, von Oberflächenbe¬ schichtungen oder Füllstoffen freiem Papier sowie natürlichen Fasern, vorzugsweise einer Kantenlänge von fünf bis einhundert und Leimen und/oder Reaktionshelfern, vorzugsweise pflanzliche Ursprungs. Es hat sich durch Versuche überraschenderweise herausgestellt, daß auf- die Qualität des Endproduktes die Kantenlänge und dieThe thermal insulation board according to the invention is obtained from a mixture of shredded flakes with an edge length of 1 to 5 mm and with decay-inhibiting additives, such as preferably borates, pretreated newspaper or the like, paper free of surface coatings or fillers and natural fibers, preferably an edge length of five up to one hundred and glues and / or reaction aids, preferably of vegetable origin. It has surprisingly been found through tests that the edge length and the quality of the end product
Form des verwendeten Papiers entscheidenden Einfluß ausübt.The form of the paper used has a decisive influence.
Bei einer Zerkleinerung des Papiers auf eine Flocken- oder Plättchenform der obengenannten Kantenlängen entstehen Produkte, die an ihren Kanten eine Vielzahl von Härchen aufweisen, die si beim Verdichten mit den Naturfasern besonders gut verkrallen un aus denen durch Einwirkung von Wärme und Feuchtigkeit der Ligninbestandteil zur Verklebung mit den Naturfasern besonders gut aktivierbar ist. Dabei stören die z.B. in oder auf Glanzdruckpapieren vorhandenen Füllstoffe und Oberflächenbe¬ schichtungen, so daß die verwendeten Papiersorten frei davon se müssen. Besonders gut hat sich Zeitungspapier (auch in bedruckt Form) bewährt, z.B Qualität "E 12" im Rohstoffhandel.When the paper is shredded to a flake or platelet shape of the abovementioned edge lengths, products are formed which have a large number of hairs on their edges, which claw particularly well when compacted with the natural fibers and from which the lignin constituent is used for gluing by the action of heat and moisture can be activated particularly well with the natural fibers. The e.g. Fillers and surface coatings present in or on glossy printing papers, so that the paper types used must be free of them. Newsprint (also in printed form) has proven particularly good, e.g. quality "E 12" in raw materials trading.
Die notwendige Zerkleinerung auf Flocken- oder Plättchenform in der notwendigen Größe gelingt besonders gut in einer Hammermühl wobei der Staubanteil im gemahlenen Produkt besonders gering se kann. Es hat sich nämlich herausgestellt, daß Staubanteile die Festigkeit der Dämmplatte herabsetzen und Materialverbrauch vermehren.The necessary comminution to flake or plate shape in the required size works particularly well in a hammer mill, with the dust content in the ground product being particularly low. It has been found that dust particles reduce the strength of the insulation board and increase material consumption.
Die zu verwendenden Naturfasern sind hinsichtlich ihrer Beschaffenheit weitgehend unkritisch, es kommen insbesonders Jute, Sisal, Baumwolle, Kokos, Flachs, solche aus Recycling- od Abfallmaterial aus Spinnereien oder aufbereitetes Material aus Stroh oder Holz oder tierische Haare, wie vorzugsweise Wolle infrage, vorzugsweise einer Länge von 5 - 100 mm. Als Leime und Reaktionshelfer werden vorzugsweise Balsamharze, wie Kolophoniu Stärke- oder Ligninkleber, Kautschuk oder auch Traßzement, Gips Aluminiumslulfat und Wasserglas eingesetzt. Die Herstellung der Platten kann dabei derart erfolgen, daß die Substanzen gemischt und aufgelockert, in eine Form gegeben, auf das gewünschte Raumgewicht verdichtet und mit Heißluft und/oder Heißdampf behandelt und getrocknet werden.The nature of the natural fibers to be used is largely uncritical with regard to their nature, in particular jute, sisal, cotton, coconut, flax, those made from recycling or waste material from spinning mills or processed material made from straw or wood or animal hair, such as preferably wool, preferably one Length from 5 to 100 mm. Balsam resins such as Kolophoniu starch or lignin glue, rubber or also road cement, gypsum aluminum sulfate and water glass are preferably used as glues and reaction aids. The plates can be produced in such a way that the substances are mixed and loosened, placed in a mold, compressed to the desired density and treated with hot air and / or superheated steam and dried.
Insbesondere werden dabei die im Papier enthaltenen Ligninbe- standteile aktiviert und als Bindemittel ausgenutzt. Ein besonders effektives Verfahren besteht erfindungsgemäß dar daß man- zunächst Papierflocken und Fasern vormischt, die Misch in ein Mischgefäß einbläst und Leim bzw. Leim und Reaktionshel ggf. in Form einer wässrigen Lösung dazu im Gegenstrom einträg danach die Mischung auflockert, in freiem Fall in eine Formsta tion einbringt und verdichtet und anschließend mit Heißluft od Heißluft und Dampf behandelt und trocknet.In particular, the lignin components contained in the paper are activated and used as binders. A particularly effective method according to the invention consists in first premixing paper flakes and fibers, blowing the mixture into a mixing vessel and glue or glue and reaction helix, optionally in the form of an aqueous solution, in countercurrent thereafter, loosening the mixture, in a free case into one Formation station brings and compressed and then treated with hot air or hot air and steam and dried.
Hierbei werden die Komponenten mit hoher Relativgeschwindigkei au einanderzu bewegt, so daß eine hohe Homogenität der Mischun gewährleistet ist. Die Leime und ggf. Reaktionshelfer können pulverförmig, in erschmolzener Form oder als wässrige Lösung i den Flocken- und Faserstrom eingedüst und setzen sich im wesentlichen auf den Oberflächen der Teilchen ab.Here, the components are moved towards each other at a high relative speed, so that a high degree of homogeneity of the mixture is ensured. The glues and optionally reaction aids can be injected in powder form, in melted form or as an aqueous solution into the flock and fiber stream and essentially settle on the surfaces of the particles.
Durch die notwendigerweise hohen Strömungsgeschwindigkeiten ko es zu einer gewissen Vorverdichtung und einer Ausrichtung der Fasern, die durch mechanisches Auflockern wieder aufgehoben werden. Das so erhaltene aufgelockerte Produkt wird anschließe in freiem Fall kontinuierlich in die Formstation gebracht und danach verdichtet. Hierdurch wird unter anderem erreicht, daß Fasern sehr gleichmäßig über den Raum verteilt in der Form lie und daß eine hohe Konstanz der Mischungsverhältnisse eingehalt werden kann.Due to the necessarily high flow velocities, there is a certain pre-compression and an alignment of the fibers, which are canceled again by mechanical loosening. The loosened product thus obtained is then continuously brought into the forming station in free fall and then compressed. In this way it is achieved, among other things, that fibers are distributed very uniformly over the space in the form and that a high constancy of the mixing ratios can be maintained.
Zusätzlich wird durch das Verdichten auf Plattenform eine gewünschte Ausrichtung der Fasern und ein Verhaken oder Verfil der Fasern und Flocken erreicht, die den Verbund verbessern un den Leimbedarf senken. Die verdichtete Masse wird anschließend mit Heißluft oder Heißluft und Dampf behandelt, wodurch die Leimbestandteile fließen und anschließend abbinden.In addition, the desired alignment of the fibers and the interlocking or filing of the fibers and flakes is achieved by compacting to plate form, which improve the bond and reduce the need for glue. The compacted mass is then treated with hot air or hot air and steam, causing the glue components to flow and then set.
Da, wie schon erwähnt, Staubanteile stören, wird vorgeschlagen, die Gegenstromdurchmischung von Flocken, Fasern und Leimbestan teilen in einem Zyklonabscheider durchzuführen, wobei die Substanzen im wesentlichen tangential zu- und Staub mittig mit Luft nach oben abgeführt werden. Die danach gesammelte und wieder mechanisch aufgelockerte Mischung kann während des freien Falles in die Formstation mit Heißdampf (oder Heißluft, falls die den Fasern innewohnende Feuchtigkeit ausreicht) behandelt werden, um die Faserbestand¬ teile zu strecken und zu quellen, da dies je nach deren Natur da erhaltene Produkt verbessern kann.Since, as already mentioned, dust components interfere, it is proposed to carry out the countercurrent mixing of flakes, fibers and glue asbestos in a cyclone separator, the substances being supplied essentially tangentially and dust being removed centrally with air upwards. The mixture then collected and loosened again mechanically can be treated with superheated steam (or hot air if the moisture inherent in the fibers is sufficient) during the free fall into the forming station in order to stretch and swell the fiber components, since this depends on their nature as product obtained can improve.
Wesentliche Bedeutung kommt der Auflockerung und Separierung der Bestandteile vor dem Einbringen in die Form zu. Es wird daher weiter vorgeschlagen, die durch Gegenstrom erzeugte Mischung der Komponenten in einem mit einem auflockernden Mischorgan versehenen Behälter (kontinuierlich) zu sammeln, mit Hilfe einer Schleuse, vorzugsweise einer Zellradschleuse, in einen Fall¬ schacht auszuschleusen und dort die Mischung erneut zu mischen und aufzulockern.The loosening and separation of the components before they are introduced into the mold is of major importance. It is therefore further proposed to collect (continuously) the mixture of components produced by countercurrent in a container provided with a loosening mixing element, to discharge it into a chute with the aid of a lock, preferably a cellular wheel lock, and to mix the mixture there again and to loosen up.
Auf diese Weise wird eine unerwünschte Klumpenbildung sicher vermieden und die Homogenität des Gefüges garantiert.In this way, undesirable lump formation is reliably avoided and the homogeneity of the structure is guaranteed.
Das "Abbinden" der Platten geschieht unter mechanischem Preßdruck, wobei man durch das gepreßte Material Heißdampf oder Heißluft oder beides, je nach der vorhandenen und der für die Aktivierung der verwendeten Leime benötigten Feuchtigkeit, unter Überdruck hindurchleitet und anschließend trocknet, was z.B. durch Hindurchleiten von Trockenluft geschehen kann, wobei diese zur Erzeugung eines Unterdrückes und zur Verdampfungsbeschleuni gung auch hindurchgesaugt werden kann.The "setting" of the plates takes place under mechanical pressure, passing hot steam or hot air or both, depending on the moisture present and required for the activation of the glues used, through the pressed material under excess pressure and then drying, which e.g. can be done by passing dry air, which can also be sucked through to generate a negative pressure and to accelerate evaporation.
Das Verfahren kann beim Füllen derart variiert werden, daß man unterschiedliche Mischungen in separaten Mischvorrichtungen herstellt und diese nacheinander aufeinander schichtet und anschließend verpreßt. So kann die Außenschicht höhere Leim- un Papieranteile aufweisen, um diese glatter zu machen oder mit Hilfe des Leimes zu kaschieren, oder je nach Anwendungsfall auc vermehrt'längere oder kürzere Faseranteile enthalten. Für eine kontinuierliche Herstellungsweise wird vorgeschlagen, das aus-dem Fallschacht rieselnde Material auf ein (gelochtes) Förderband zu geben, dem ein oben laufendes Lochband (Oberband zugeordnet ist. Letzteres besitzt einen schrägen, sich in Transportrichtung verengenden Einzugsbereich, der sich auf das gewünschte Maß der Plattenstärke absenkt und in die Heißdampf und/oder Heißluftzufuhr und die Trockenstation ausläuft.The process can be varied during filling such that different mixtures are produced in separate mixing devices and these are successively layered on top of one another and then pressed. For example, the outer layer can have higher proportions of glue and paper in order to make them smoother or to cover them with the aid of the glue, or, depending on the application, can also contain longer or shorter fiber proportions. For a continuous production method, it is proposed to put the material trickling out of the chute onto a (perforated) conveyor belt, to which a perforated belt (top belt) running at the top is assigned the plate thickness is reduced and runs into the hot steam and / or hot air supply and the drying station.
Da das Material dem Transport auf einem Band einen hohen Widerstand entgegensetzt, wird vorgeschlagen, das zu verdichte Produkt auch seitlich mitlaufend, beispielsweise durch eigene Bänder zu führen.Since the material opposes high resistance to transport on a belt, it is proposed that the product to be compacted also be guided laterally, for example by its own belts.
Die erfindungsgemäße Vorrichtung besteht aus einem Zyklon mit oberer tangentialer Zuführung der Faser/Flockenmischung und et gegenüberliegender Gegenstromeingabe der Leimbestandteile. Die Mischung rotiert peripher und gelangt auf den Boden des Zyklon wo sie gesammelt und von einem Füllstandsanzeiger überwacht wi Kopfseitig sind zur Entstaubung Filtersäcke vorgesehen.The device according to the invention consists of a cyclone with an upper tangential feed of the fiber / flake mixture and opposite counter-current input of the glue components. The mixture rotates peripherally and reaches the bottom of the cyclone where it is collected and monitored by a level indicator. Filter bags are provided on the top for dust removal.
Im Sammelbereich sind rotierende Kammzinkenwellen angeordnet, darunter befinden sich eine Zellradschleuse, die das Material ein weiteres Mischorgan dosiert, wobei es gegebenenfalls bedam werden kann. Unterhalb des letzteren Mischorganes befindet sic ein Fallschacht und unter diesem die Füllstation, wobei am Ausgang Abstreifwellen vorgesehen sein können.Rotating comb tine shafts are arranged in the collecting area, underneath there is a rotary valve which doses the material to another mixing element, whereby it can be used if necessary. Below the latter mixing element there is a chute and below this the filling station, and stripping shafts can be provided at the outlet.
Anhand der beiliegenden Figur wird die vorliegende Erfindung näher erläutert.The present invention is explained in more detail with reference to the attached figure.
Der Zyklon 1 besitzt zwei gegeneinander gerichtete, etwa tangentiale Materialeinträge, die Zuführung 2 für die Vormisch aus Papierflocken und Naturfasern. Diese Vormischung enthält d wesentlichen Substanzen, d.h. neben den Fasern und Papierflock z.B. auch die fäulnishemmenden Substanz-en, die dem Papier scho beim Vermählen zugegeben werden können. Mit Hilfe der Druckdüse 3 wird in das rotierende Gemisch der Lei in Pulverform oder als Schmelze oder in wässriger Lösung eingeblasen. Zur Herstellung des Leimes dienen dabei der" Vorratsbehälter 4 mit Mischer 5, sowie der Dosierbehälter 6 mit Schneckenaustrag 7. An den Schneckenaustrag schließt sich ein Druckeinstäuber 8 an, der in die Druckdüse 3 mündet. Der Materialeintrag geschieht vorzugsweise luftarm mit hoher Geschwindigkeit, wofür geeignete Vorrichtungen bestehen.The cyclone 1 has two mutually directed, approximately tangential material inputs, the feed 2 for the premix of paper flakes and natural fibers. This premix contains the essential substances, ie in addition to the fibers and paper flock, for example also the putrefactive substances which can be added to the paper during grinding. With the help of the pressure nozzle 3, the lei is blown into the rotating mixture in powder form or as a melt or in aqueous solution. The " storage container 4 with mixer 5 and the dosing container 6 with screw discharge 7 are used to produce the glue. The screw discharge is followed by a pressure sprayer 8, which opens into the pressure nozzle 3. The material is preferably fed in at low air, for which purpose Devices exist.
Der durch den Materialeintrag im Inneren des Zyklons 1 erzeugte Überdruck dient gleichzeitig der Entstaubung durch die Filter¬ säcke 9 am Kopf des Zyklons 1.The excess pressure generated by the material input in the interior of the cyclone 1 serves at the same time for dedusting by the filter bags 9 at the top of the cyclone 1.
Der Zyklon ist mit einer Füllstandskontrolle 11 ausgerüstet, der vor Überfrachtung die Materialzufuhr drosselt. Am Boden des Zyklons 1 sind Mischorgane in Form von Kammzinkenwellen 10 angeordnet, die das Material homogenisieren und durch ständige Bewegung ein vorzeitiges Abbinden des Leimes verhindern. Unterhalb dieser Kammzinkenwellen 11 liegt eine Schleuse, vorzugsweise eine Zeilradschleuse 12, die das Material in den Fallschacht 13 eindosiert. Unterhalb der Zellradschleuse kann eine Bedampfung 14 vorgesehen sein, die einer Vorquellung und Streckung der Fasern dient.The cyclone is equipped with a fill level control 11, which throttles the material supply before being overloaded. Mixing elements in the form of comb tine shafts 10 are arranged on the bottom of the cyclone 1, which homogenize the material and prevent premature setting of the glue by constant movement. Below this comb tine shaft 11 there is a lock, preferably a pin wheel lock 12, which doses the material into the chute 13. Evaporation 14 can be provided below the cellular wheel sluice, which serves to pre-swell and stretch the fibers.
Unterhalb der Zellradschleuse 12 am Kopf des Fallschachtes 13 sind wiederum Mischorgane, auch hier vorzugsweise in Form von Kammzinkenwellen 10 angeordnet, die das Material ebenfalls in ständiger Bewegung halten und zur Vereinzelung in den Fallschach 13 bringen.Below the rotary valve 12 at the head of the chute 13 are again mixing elements, also preferably in the form of comb tine shafts 10, which also keep the material in constant motion and bring it into the chess 13 for separation.
Dieser Fallschacht 13 ist vorzugsweise sich nach unten erweiter ausgebildet, um ein Anbacken von Leimbestandteilen bei gelöster oder erschmolzener Zugabe zu verhindern. Am Fuß des Fallschachte befindet sich ebenfalls eine Füllstandskontrolle 15 und darunte die Formstation, die hier als Vielzahl von oben offenen Formkästen 16 ausgebildet ist. In diese Kästen 16 rieselt das Material vollkommen aufgelockert ein. Die Kästen 16 sind verschieblich gelagert. Nach BefUllen eines Kastens gelangt dieser zu einer Presse 17, der die lockere Schüttung auf das gewünschte Raumgewicht verdichtet wird. Die Presse besteht in einfacher Weise aus eine ebenso wie die Formkästen gelochten, auf die Maße der Kästen angepaßten Blech, das auf die Füllung gelegt und niedergedrückt wird.This chute 13 is preferably designed to expand downward in order to prevent caking of glue components when the addition is dissolved or melted. At the foot of the chute there is also a fill level control 15 and underneath it the molding station, which is designed here as a plurality of molding boxes 16 open at the top. The material flows into these boxes 16 in a completely loosened state. The boxes 16 are slidably mounted. After a box has been filled, it arrives at a press 17, which compresses the loose bed to the desired density. The press consists in a simple manner of a perforated sheet, just like the molded boxes, which is adapted to the dimensions of the boxes and which is placed on the filling and pressed down.
Das gelochte Blech kann bis zum Entformen auf dem Kasten verbleiben, es ist jedoch auch möglich, in den folgenden Stufen zum Niederhalten und Abbinden eigene gelochte Bleche aufzu¬ bringen. Dabei entsteht eine gewünschte Orientierung und Verhakung der Fasern, die den Verbund mechanisch festigt.The perforated sheet can remain on the box until it is removed from the mold, but it is also possible to apply separate perforated sheets in the subsequent stages for holding down and setting. This creates the desired orientation and entanglement of the fibers, which mechanically strengthens the bond.
Am Austritt der Formkästen 16 aus dem Fallschacht 13, können Abstreifwellen 18 angeordnet sein, die für einen gleichmäßigen Füllgrad sorgen.At the exit of the molding boxes 16 from the chute 13, scraper shafts 18 can be arranged, which ensure a uniform degree of filling.
Da die Fallgeschwindigkeit der Mischungsbestandteile unterschie lich ist, kommt es bei jeder Inbetriebnahme des Fallschachtes z einer geringfügigen Entmischung durch Voreilung der schneller sinkenden Komponente.Since the falling speed of the mixture constituents is different, every time the chute is put into operation there is a slight separation due to the premature falling component.
Die Vorrichtung ist daher vorzugsweise anzufahren und kontinuie lich in Betrieb zu halten.The device should therefore preferably be started up and kept in operation continuously.
An die Presse 17 schließen sich die Temperatur- und Feuchtig- keitsbehandlungsstufen an. Zunächst kann Heißluft und Heißdampf zur Aktivierung des Leimes und der aktivierbaren Ligninbestand- teile eingeblasen werden 19.The temperature and moisture treatment stages follow the press 17. First, hot air and hot steam can be blown in to activate the glue and the activatable lignin components 19.
Danach kann Druckluft 20 zur Trocknung eingeblasen und anschlie end in einer weiteren Stufe 21 entweder-weitere Trockenluft zugeführt werden, deren Abluft in 20 zur Vortrocknung dienen kann, oder, es kann auch mit Hilfe von Vakuum in 21 auf bauphysikalische Restfeuchte getrocknet werden. Die Formkästen werden nach Entformen im Kreislauf geführt.Then compressed air 20 can be blown in for drying and then in a further stage 21 either further drying air can be supplied, the exhaust air of which can be used for pre-drying in 20, or it can also be dried to residual building physics with the help of vacuum in 21. The mold boxes are circulated after removal from the mold.
Über die Abstreifwellen 18 kann der Füllgrad geregelt werden, wenn diese höhenverstellbar ausgebildet sind.The degree of filling can be regulated via the scraper shafts 18 if they are height-adjustable.
Die Temperatur- und Feuchtigkeitssteuerung geschieht vorzugsweis olgendermaßen:The temperature and humidity control is preferably carried out as follows:
Durch die Öffnungen des untenliegenden Lochbleches wird ein Gemisch aus Heißluft und Heißdampf eingetrieben, dessen Temperatur und Mischungsverhältnis regelbar ist.A mixture of hot air and superheated steam is driven in through the openings in the perforated plate below, the temperature and mixing ratio of which can be regulated.
Sobald das einströmende Gasgemisch die Luft aus dem durch den Deckel leicht verdichteten Plattenrohmaterial verdrängt ist, wir durch Drosselung des Absaugventils ein Überdruck erzeugt, der di anschließende Befeuchtung des Flocken-Faser-Leim-Gemisches fördert.As soon as the inflowing gas mixture displaces the air from the plate raw material, which is slightly compressed by the cover, an excess pressure is generated by throttling the suction valve, which promotes the subsequent moistening of the flake-fiber-glue mixture.
Das Gasgemisch wird der Form so lange zugeführt, bis eine Aufheizung des Materials auf knapp unter dem Siedepunkt der enthaltenden Flüssigkeit erreicht ist. Die Feuchtigkeit muß ausreichen, um die Abbinde- und Reaktionsvorgabe einschließlich der Reaktivierung der im Papier enthaltenen Leime zu ermöglichenThe gas mixture is fed into the mold until the material is heated to just below the boiling point of the liquid it contains. The moisture must be sufficient to enable the setting and reaction specifications, including the reactivation of the glues contained in the paper
Sobald diese Feuchte im Material erreicht ist (vorzugsweise im niedrigen Bereich zwischen 10 und 25 Gewichts-% Wasseraufnahme), wird die Zufuhr des Dampf-Luft-Gemisches beendet, der Überdruck entspannt und aus dem Saugdeckel ein Unterdruck erzeugt.As soon as this moisture in the material is reached (preferably in the low range between 10 and 25% by weight of water absorption), the supply of the steam-air mixture is stopped, the excess pressure is released and a negative pressure is generated from the suction cover.
Die erneute Verdampfung der Feuchtigkeit wird durch gedrosselte Zufuhr von Heißluft aus dem Bodenelement und gegebenenfalls durc zusätzliche Beheizung herbeigeführt und- as entstehende Dampf- Luft-Gemisch durch den trocknenden Plattenkörper in den Saugdeckel abgesaugt - Unterdruck.The renewed evaporation of the moisture is brought about by throttling the supply of hot air from the base element and, if necessary, by additional heating, and the resulting vapor / air mixture is sucked off through the drying plate body into the suction cover - negative pressure.
Durch diesen Vorgang benötigt der Trockenprozeß der Platten nich so lange, bis die Feuchte auch aus den -inneren Bereichen der Platte durch die Salze und Fasermaterialien nach außen hindurch- diffundiert ist, sondern wird durch den Luftstrom, der gleich tig Verdampfungsenergie mitbringt, wesentlich schneller aus d Platte herausgetragen.As a result of this process, the drying process of the plates does not take so long until the moisture also passes from the inside of the plate through the salts and fiber materials to the outside. diffused, but is carried out of the plate much faster by the air flow, which also brings evaporation energy with it.
Ein weiterer Teil der Verdampfungsenergie wird durch die Steuerung des Druckes in der geschlossenen Form beigetragen.Another part of the evaporation energy is contributed by controlling the pressure in the closed form.
Ein die baupraktische Feuchte (von ca. 10 % Gewicht Feuchte) geringfügig übersteigender Feuchterest kann in der Platte verbleiben. Sobald die Feuchte soweit abgesunken ist, kann di Platte nachtrocknen und ausgeschalt und verpackt werden.A moisture residue that slightly exceeds the building moisture (approx. 10% weight moisture) can remain in the plate. As soon as the moisture has dropped so far, the plate can be dried and switched off and packed.
Erwünschte Aufkaschierung mit feuchte- oder windschützenden Baupapieren können jetzt vorgenommen werden.Desired lamination with moisture or wind-protecting construction papers can now be carried out.
Die Behandlung der feuchten Platte mit Heißluft kann gegebene falls die Nachhärtung bestimmter Kleber, z.B. Ligninkleber bewirken.Treatment of the moist plate with hot air can be used if the post-curing of certain adhesives, e.g. Effect lignin glue.
Die Energiewirtschaft der Gasamtanlage kann durch Minimierung Wärmeverlusten durch Wärmedämmung der temperaturführenden Leitungen und Oberflächen und gute Abdichtungen, sowie eine Rückgewinnung von Wärme aus der Nachtrocknung der Platten, de Kondensationswärme der feuchten Trocknungsabluft und des Heißdampf-Heißluft-Überschusses aus der Bedampfung optimiert werden.The energy management of the gas central system can be optimized by minimizing heat losses through thermal insulation of the temperature-conducting pipes and surfaces and good seals, as well as recovering heat from the post-drying of the plates, the heat of condensation from the moist drying exhaust air and the superheated steam-hot air excess from steaming.
Die Bedampfungsmischung kann auch durch Nachheizung der feuch Trocknungsabluft (dampfhaltig) gewonnen und so die Feuchtigkei im Kreislauf geführt werden. The vaporization mixture can also be obtained by reheating the moist drying exhaust air (containing steam) and thus the moisture can be circulated.

Claims

P a t e n t a n s p r ü c h e Patent claims
1.) Wärmedämmplatte, erhalten aus einer Mischung aus auf Flocke von 1 bis 5 mm Kantenlänge zerkleinertem und mit fäulnishem menden Zusätzen, wie vorzugsweise Boraten, vorbehandeltem Zeitungs- oder ähnlichem, von Oberflächenbeschichtungen ode Füllstoffen freiem Papier sowie natürlichen Fasern, vorzugsweise einer Kantenlänge von fünf bis einhundert mm und Leimen und/oder Raktionshelfern, vorzugsweise pflanzli¬ chen Ursprungs.1.) Thermal insulation board, obtained from a mixture of flaked from 1 to 5 mm edge length and with putrefactive additives, such as preferably borates, pretreated newspaper or the like, paper free of surface coatings or fillers and natural fibers, preferably an edge length of five up to one hundred mm and glues and / or Raktionshelfer, preferably of vegetable origin.
2.) Wärmedämmplatte nach Anspruch 1, dadurch gekennzeichnet, da das Papier in einer Hammermühle, staubarm, vorzugsweise staubfrei zerkleinert ist.2.) Thermal insulation board according to claim 1, characterized in that the paper is crushed in a hammer mill, low dust, preferably dust-free.
3.) Wärmedämmplatte nach Anspruch 1 oder 2, dadurch gekennzeich net, daß in ihr als natürliche Fasern solche aus Jute, Sisal, Baumwolle, Kokos, Flachs, insbesondere solche aus Recycling- oder Abfallmaterial aus Spinnereien oder aufbereitetes Material aus Stroh oder Holz oder tierische Haare, wie vorzugsweise Wolle, enthalten sind.3.) Thermal insulation panel according to claim 1 or 2, characterized in that in it as natural fibers such as jute, sisal, cotton, coconut, flax, in particular those made from recycling or waste material from spinning mills or processed material from straw or wood or animal Hair, such as preferably wool, is included.
4.) Wärmedämmplatte nach mindestens einem der Ansprüche 1 bis 3 dadurch gekennzeichnet, daß als Leime und Reaktionshelfer Balsamharze, wie Kolophonium, Stärke- oder Ligninkleber, Kautschuk oder auch Traßzement, Gips, Aluminiumslulfat und Wasserglas verwendet sind. 4.) Thermal insulation board according to at least one of claims 1 to 3, characterized in that balsam resins such as rosin, starch or lignin glue, rubber or else cement, gypsum, aluminum sulfate and water glass are used as glues and reaction aids.
5.) Verfahren zur Herstellung von Wärmedämmplatten nach Anspr5.) Process for the production of thermal insulation boards according to claims
1 bis 4, dadurch gekennzeichnet, daß man zunächst Papier¬ flocken und Fasern vormischt, die Mischung in ein Mischge eihbläst und Leim bzw. Leim und Reaktionshelfer ggf. in F einer wässrigen Lösung dazu im Gegenstrom einträgt, danac die Mischung auflockert, in freiem Fall in eine Formstati einbringt und verdichtet und anschließend mit Heißluft od Heißluft und Dampf behandelt und trocknet.1 to 4, characterized in that first of all paper flakes and fibers are premixed, the mixture is blown into a mixing jar and glue or glue and reaction aids are added, if appropriate in F an aqueous solution, in countercurrent, after which the mixture loosens, in free case brings in a Formstati and compacted and then treated with hot air or hot air and steam and dried.
6.) Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß ma Fasern und Papierflocken tangential in einen Zyklonabsche der einbringt, im Gegenstrom dazu Leim und ggf. Reaktions helfer eindüst, mittig nach oben Luft abzieht und entstau und die derart vorbehandelte Mischung auflockert, der Formstation zuführt und dabei die Fasern ggf. mit Heißdam behandelt.6.) Method according to claim 5, characterized in that ma fibers and flakes of paper tangentially into a cyclone separator, injecting glue and possibly reaction helper in countercurrent, withdrawing air and decongesting air centrally and loosening the pretreated mixture, the forming station feeds and thereby treated the fibers with hot dam if necessary.
7.) Verfahren nach Anspruch 5 oder 6, dadurch gekennzeichent, daß man die Mischung aus Fasern, Papier und Leim bzw. Reaktionshelfern in einem mit auflockernden Mischorganen versehenen Vorratsbehälter ansammelt, mit Hilfe einer (Zellrad)schleuse in einen Fallschacht einträgt, dort erne mischt und auflockert und das Produkt in die Formstation rieseln läßt.7.) Method according to claim 5 or 6, characterized gekennzeichent that one collects the mixture of fibers, paper and glue or reaction aids in a storage container provided with loosening mixing elements, with the help of a (cellular wheel) lock in a chute, mixed there again and loosens and lets the product trickle into the forming station.
8.) Verfahren nach mindestens einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, daß man das locker eingefüllte Material auf die gewünschte Dichte preßt und bodenseitig Heißluft und Heißdampf zuführt, Leim und ggf. Reaktionshel fer und im Papier vorhandene Leimstoffe bei Temperaturen v mehr als 160 °C aktiviert und anschließend unter Luftdurch leitung durch das unter Verdichtungsdruck stehende Materia abbinden läßt und trocknet. 8.) Method according to at least one of claims 5 to 7, characterized in that the loosely filled material is pressed to the desired density and hot air and superheated steam are supplied on the bottom, glue and optionally reaction hel fer and glue present in the paper at temperatures v more than 160 ° C activated and then allowed to set under air conduction through the material under compression and dries.
9.) Verfahren nach mindestens einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, daß aus separaten Füllstationen unterschiedliche Mischungen in die Formen aufeinander gefüllt werden.9.) Method according to at least one of claims 5 to 8, characterized in that different mixtures are filled into the molds from one another from separate filling stations.
10.) Verfahren nach mindestens einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, daß die Mischung auf ein umlaufende Loch-Band gegeben und durch ein schrägeinziehendes, ebenfalls mit Löchern versehenes Oberband verdichtet wird, wobei die seitliche Begrenzung ggf. ebenfalls mitlaufend ausgebildet ist.10.) Method according to at least one of claims 5 to 8, characterized in that the mixture is placed on a circumferential perforated belt and compressed by an obliquely retracting upper belt also provided with holes, the lateral boundary possibly also being designed to follow.
11.) Verfahren nach mindestens einem der Ansprüche 5 bis 10, gekennzeichnet durch ein Mischungsverhältnis der Komponente von Papier : Faser : Leimen und Raktionshelfern, wie von 4 : 4 : 1 bis 5 : 2 : 211.) Method according to at least one of claims 5 to 10, characterized by a mixing ratio of the component of paper: fiber: glue and Raktionshelfer, such as from 4: 4: 1 to 5: 2: 2
12.) Vorrichtung zur Durchführung des Verfahrens nach Anspruch bis 11, bestehend aus einem Zyklon (1) mit kopfseitiger Entstaubung (9), darunter angeordneter tangentialer, luftarmer Zuführung (2) der Vormischung aus Papierteilchen, Fasern und fäulnishemmenden Zusätzen, einer Gegenstromdüse (3) für Leime und Reaktionshelfer sowie einer Mehrzahl von Kammzinkenwellen (10) und darunter angeordneter Zellrad¬ schleuse (12), wobei unterhalb der Zellradschleuse weitere Kammzinkenwellen (10) angeordnet sind, unter denen sich ei sich vorzugsweise nach unten erweiternder Fallschacht (13) befindet, der in eine Formstation 16) mündet.12.) Device for performing the method according to claim to 11, consisting of a cyclone (1) with dedusting at the top (9), below arranged tangential, low-air feed (2) of the premix of paper particles, fibers and anti-rot additives, a counterflow nozzle (3 ) for glues and reaction aids as well as a plurality of comb tine shafts (10) and cell wheel sluice (12) arranged underneath, further comb tine shafts (10) being arranged below the cell wheel sluice, below which there is preferably a downwardly extending chute (13), which opens into a molding station 16).
13.) Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, daß die Formstation (16) diskontinuierlich arbeitend mit aufeinander folgenden separaten Formen und auf sie aufsetzbaren Druckplatte (17) ausgebildet sind, wobei Form und Druckplatte gelocht sind, und daß an den Fallschacht (13) in Förderrichtung anschließend eine Zufuhrstation (19 von Heißluft und Heißdampf und an diese anschließend eine oder mehrere Trockenstationen (20,21) mit Zwangsluftführu vorgesehen ist.13.) Apparatus according to claim 12, characterized in that the molding station (16) are discontinuously working with successive separate molds and pressure plate (17) which can be placed on them, the mold and pressure plate being perforated, and in that the chute (13) a feed station (19 of hot air and superheated steam and to these one or more drying stations (20, 21) with forced air guidance is provided.
14.) Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, daß die Formstation aus einem gelochten, umlaufenden Bodenban und einem, einen schräg verlaufenden, ebenfalls gelochten Kopfband besteht, zwischen die die aufgeschüttete Mischun eingezogen und verdichtet wird, die beide seitlich, gegebenenfalls mitlaufend begrenzt sind und daß an den Verdichtungsbereich anschließend eine Heißluft- und ggf. Heißdampfzufuhr sowie eine Trockenstation mit Zwangsluft¬ führung vorgesehen ist. 14.) Device according to claim 12, characterized in that the forming station consists of a perforated, circumferential bottom band and a, an obliquely running, likewise perforated headband, between which the heaped mixture is drawn in and compacted, both of which are laterally, optionally concurrently delimited and that a hot air and possibly hot steam supply as well as a drying station with forced air guidance are provided at the compression area.
EP19870907930 1986-12-04 1987-12-04 Insulating board containing natural fibres, process and device for its production Expired - Lifetime EP0330671B1 (en)

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AT87907930T ATE84588T1 (en) 1986-12-04 1987-12-04 THERMAL INSULATION BOARD CONTAINING NATURAL FIBERS, AND METHOD AND DEVICE FOR THEIR MANUFACTURE.

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DE19863641464 DE3641464A1 (en) 1986-12-04 1986-12-04 HEAT-INSULATING PANEL CONTAINING NATURAL FIBERS AND METHOD AND DEVICE FOR THEIR PRODUCTION
DE3641464 1986-12-04

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EP (1) EP0330671B1 (en)
AT (1) ATE84588T1 (en)
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US5085898A (en) 1992-02-04
DK389888A (en) 1988-07-12
ATE84588T1 (en) 1993-01-15
DK169184B1 (en) 1994-09-05
WO1988004347A1 (en) 1988-06-16
DK389888D0 (en) 1988-07-12
DE3783612D1 (en) 1993-02-25
DE3641464A1 (en) 1988-06-16
EP0330671B1 (en) 1993-01-13

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