EP0095678B1 - Process for the production of a glue film and a hardener film, and device for carrying out the process - Google Patents

Process for the production of a glue film and a hardener film, and device for carrying out the process Download PDF

Info

Publication number
EP0095678B1
EP0095678B1 EP83104999A EP83104999A EP0095678B1 EP 0095678 B1 EP0095678 B1 EP 0095678B1 EP 83104999 A EP83104999 A EP 83104999A EP 83104999 A EP83104999 A EP 83104999A EP 0095678 B1 EP0095678 B1 EP 0095678B1
Authority
EP
European Patent Office
Prior art keywords
hardener
glue
board
film
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83104999A
Other languages
German (de)
French (fr)
Other versions
EP0095678A2 (en
EP0095678A3 (en
Inventor
Joachim Ebert
Claus Dr. Neumann
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to AT83104999T priority Critical patent/ATE29399T1/en
Publication of EP0095678A2 publication Critical patent/EP0095678A2/en
Publication of EP0095678A3 publication Critical patent/EP0095678A3/en
Application granted granted Critical
Publication of EP0095678B1 publication Critical patent/EP0095678B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/30—Processes for applying liquids or other fluent materials performed by gravity only, i.e. flow coating
    • B05D1/305—Curtain coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/002—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the work consisting of separate articles
    • B05C5/004—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the work consisting of separate articles the work consisting of separate rectangular flat articles, e.g. flat sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/005—Curtain coaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G11/00—Applying adhesives or glue to surfaces of wood to be joined

Definitions

  • the present invention relates to a method for forming a glue and hardener film and a device for carrying out the method.
  • glue and hardener should be applied separately to the wooden surfaces to be glued with the aid of one nozzle each. Due to the use of nozzles, it cannot be guaranteed that all surfaces to be glued are wetted to the same extent by glue and hardener.
  • DE-PS 2 416 032 describes applying glue and hardener separately to the wood in the form of strips. However, this does not always ensure that strips of glue and hardener come into contact with each other.
  • liquid glue and hardener films
  • liquid glue and hardener films
  • the pouring curtain is formed by overflowing the liquid over the edge of the trough.
  • the edge of the trough over which the liquid runs must be absolutely flat and arranged horizontally in order to achieve a liquid film of uniform thickness. For example, air bubbles that emerge from the liquid can form holes in the film.
  • DE-A-1 918 462 describes a method for forming a lacquer film and a device with the features of the preamble of claims 1 and 4, respectively.
  • the known method is intended to keep the leading edge and the trailing edge of the workpieces free of paint.
  • the workpiece transport elements closer to the flow curtain in the direction of flow are arranged lower than the workpiece transport elements arranged at the beginning and end of the transport.
  • a liquid film on a board in particular a glue and hardener film on a preferably elongated board intended for the production of wooden structures, by pouring at least one liquid by means of at least one dispensing container arranged above the board and transverse to its direction of movement , the width of which tapers towards the board, the liquid film being in each case the same width or width as the board and preferably the board being moved under the dispensing containers, the liquid being dispensed from the dispensing container as a falling flow curtain, can advantageously be carried out, if the longitudinal walls of the dispenser are sieve-shaped, such that the liquid forms a closed surface on the outside of the sieve or perforated plate after passing through and forms the falling flow curtain from the lowest point.
  • the device suitable for this process which is preferably operated in a stationary manner, essentially consists of storage containers 1 for glue or hardener, with the respective storage containers connected in line with the respective storage containers, arranged above the board 2, dispensing containers 3 arranged below the board, and optionally one each for the return of glue and hardener connecting line 4 and in each case one pump 5 arranged in the connecting line, at least one of the dispensing containers being designed as a trough-shaped dispensing container 6, the width of which tapers towards the board and the longitudinal walls 7, 7 'of which are sieve-shaped are and have a drain edge 8 at their lowest point.
  • a special embodiment of the dispensing container is that it has the shape of a three-sided prism, the two inclined longitudinal walls 7, 7 'representing the sieve or perforated plate, the line of intersection of which forms the drain edge 8 and the upper side of the dispensing container is provided with an inlet 11 .
  • the resulting liquid curtain has a tendency to contract, it can be guided and stabilized at its edges. This can be done with the aid of rigid or elastic rods 9, 9 'which act in a manner known per se and which are located at the two ends of the trailing edge.
  • Another possibility is to guide and stabilize the liquid curtain through special, adjustable in size outlet openings 10, 10 ', which are located at both ends of the trailing edge.
  • the two outlet openings which can have the shape of holes or slots, Compared to the smaller sieve or perforated plate openings, more liquid escapes per unit of time. As a result, two liquid strands delimiting the liquid curtain are formed. In individual cases, this type of guiding the liquid curtain can have the advantage of being less susceptible to faults than with guide rods.
  • the flow rate of the liquid is generally regulated by the delivery rate of the pump 12.
  • the pump output is increased.
  • more liquid is conveyed into the sieve trough, and at the same time the liquid outlet area increases.
  • the amount of discharge can be further increased by providing a closed delivery container ( Figure 3). In this way, the amount of liquid emerging from the sieve becomes essentially proportional to the pump pressure.
  • sieves or perforated plates with different mesh sizes can be used.
  • wire mesh sieves with a width of 1 to 6 mm can be used.
  • glue and hardener can be applied either separately or as a mixture.
  • the excess glue and the hardener can be returned to the storage container by means of pumps.
  • the inventive method allows the use of various types of liquid glues, for. B. of aminoplast or phenolic resins such as formaldehyde-urea condensates.
  • formaldehyde-urea-melamine condensates formaldehyde-urea-melamine-phenol condensates, formaldehyde-phenol condensates or formaldehyde-phenoi / resorcinol condensates.
  • Glues and hardeners can be used for this in both thixotropic and non-thixotropic settings - in the case of non-thixotropic settings, the hardener should be viscous if necessary - and can be used in pure form or together with additional aids known per se.
  • the method according to the invention ensures that when the glue and hardener are applied separately, both components always come into contact with one another.
  • a metal dispensing container in the form of a three-sided prism was used as the casting device, the edge length of the end walls in each case being 15 cm and that of the two inclined, sieve-shaped longitudinal walls in each case 45 cm.
  • the sieve surfaces consisted of wire mesh with a mesh size of 2 mm.
  • rigid, downward-facing metal rods were located at the two lower ends of the drain edge.
  • a resorcinol resin and, separately, a thixotropic liquid hardener were cast in Example 1 and, in Example 2, a resorcinol resin, thixotropically adjusted and a thixotropic liquid hardener separately.
  • example 2 the glue or hardener described in example 1 was used, a thixotropic agent likewise being added to the glue.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Adhesive Tapes (AREA)
  • Moulding By Coating Moulds (AREA)
  • Dental Preparations (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

1. A process for the formation of a film of liquid on a board, especially a film of glue and hardener on a preferably elongate board (2) intended for the production of wooden load-bearing structures, by casting at least one liquid by means of at least one dispensing vessel (6) which is arranged above the board and transverse to the direction of travel of the latter, and which tapers as width towards the board, the film of liquid being as, or wider than, the board, the board (2) being preferably passed beneath the dispensing vessel (6), the liquid being supplied from the dispersing vessel (6) in the form of a falling curtain, wherein the longitudinal walls (7, 7') of the dispensing vessel (6) are of sieve-like construction, so that the liquid, after passing therethrough, forms a coherent film on the outside of the sieve or perforated plate and a falling curtain as it runs off at the lowest point.

Description

Die vorliegende Erfindung betrifft ein Verfahren zur Ausbildung eines Leim- und Härterfilms und eine Vorrichtung zur Ausübung des Verfahrens.The present invention relates to a method for forming a glue and hardener film and a device for carrying out the method.

Bei der Verleimung von Holzteilen ist die Methode, nach der Leim und Härter aufgebracht werden, von wesentlicher Bedeutung. Von ihrer Ausführung wird die Qualität der Verleimung entscheidend mit beeinflußt.When gluing wooden parts, the method by which glue and hardener are applied is essential. The quality of the gluing is decisively influenced by their execution.

Nach dem Vorschlag der DE-PS 2 213 269 sollen Leim und Härter getrennt voneinander mit Hilfe von je einer Düse auf die zu verleimenden Holzflächen aufgetragen werden. Dabei läßt sich, bedingt durch die Verwendung von Düsen, nicht gewährleisten, daß alle zu verleimenden Flächen in gleichem Maße von Leim und Härter benetzt werden.According to the proposal of DE-PS 2 213 269, glue and hardener should be applied separately to the wooden surfaces to be glued with the aid of one nozzle each. Due to the use of nozzles, it cannot be guaranteed that all surfaces to be glued are wetted to the same extent by glue and hardener.

In der DE-PS 2 416 032 ist beschrieben, Leim und Härter getrennt voneinander in Form von Streifen auf das Holz aufzutragen. Hier ist aber nicht immer sicher gestellt, daß Leim- und Härterstreifen miteinander in Berührung kommen.DE-PS 2 416 032 describes applying glue and hardener separately to the wood in the form of strips. However, this does not always ensure that strips of glue and hardener come into contact with each other.

Eine andere Möglichkeit besteht im Gießen von Leim- und Härterfilmen (im folgenden wird für die Begriffe Leim und Härter der Begriff Flüssigkeit verwendet) auf die Holzoberfläche. Üblicherweise arbeitet man dabei mit Trögen, bei denen der Gießvorhang durch Überlaufen der Flüssigkeit über den Trogrand gebildet wird. Dabei muß die Trogkante, über die die Flüssigkeit abläuft, absolut plan sein und waagrecht angeordnet, um so einen Flüssigkeitsfilm von gleichmässiger Dicke zu erzielen. Dabei können beispielsweise Luftblasen, die aus der Flüssigkeit treten, Löcher im Film bilden.Another possibility is to cast glue and hardener films (hereinafter the term liquid is used for the terms glue and hardener) on the wooden surface. Usually one works with troughs in which the pouring curtain is formed by overflowing the liquid over the edge of the trough. The edge of the trough over which the liquid runs must be absolutely flat and arranged horizontally in order to achieve a liquid film of uniform thickness. For example, air bubbles that emerge from the liquid can form holes in the film.

Die Anwendung von Schlitzen zur Ausbildung eines Gießfilms wird in der DE-PS 1 097864 bzw. im Deutschen Gebrauchsmuster Nr. 1 735 852 beschrieben. Bei dieser Methode können Schwierigkeiten bei der Herstellung eines Films von gleichmäßiger Dicke auftreten. Die Kanten, die den Schlitz bilden, müssen dabei einerseits absolut plan und andererseits parallel und waagrecht angeordnet sein. Ist dies nicht der Fall, oder setzen sich vor dem Schlitz feste Bestandteile in Form von beispielsweise Klumpen oder Holzstückchen fest, so kann der Flüssigkeitsfilm abreißen.The use of slots to form a cast film is described in DE-PS 1 097864 or in German Utility Model No. 1 735 852. This method can cause difficulties in making a film of uniform thickness. The edges that form the slot must be absolutely flat on the one hand and parallel and horizontal on the other hand. If this is not the case or if solid constituents in the form of, for example, lumps or pieces of wood get stuck in front of the slot, the liquid film can tear off.

In der DE-A-1 918 462 ist ein Verfahren zur Ausbildung eines Lackfilms und eine Vorrichtung mit den Merkmalen des Oberbegriffs des Anspruches 1 bzw. 4 beschrieben. Mit dem bekannten Verfahren soll erreicht werden, die Vorauskante und die Schlußkante der Werkstücke frei von Lack zu halten. Hierzu werden die in Durchlaufrichtung dem Fließvorhang näher liegenden Werkstück-Transportelemente tiefer angeordnet als die am Transportanfang und -ende angeordneten Werkstück-Transportelemente.DE-A-1 918 462 describes a method for forming a lacquer film and a device with the features of the preamble of claims 1 and 4, respectively. The known method is intended to keep the leading edge and the trailing edge of the workpieces free of paint. For this purpose, the workpiece transport elements closer to the flow curtain in the direction of flow are arranged lower than the workpiece transport elements arranged at the beginning and end of the transport.

Es wurde nun gefunden, daß die Ausbildung eines Flüssigkeitsfilms auf einem Brett, insbesondere eines Leim- und Härterfilms auf einem zur Herstellung von Holztragewerken bestimmten, vorzugsweise langgestreckten Brett, durch Gießen mindestens einer Flüssigkeit mittels mindestens eines über dem Brett angeordneten und zu dessen Bewegungsrichtung querstehenden Abgabebehälters, dessen Breite sich in Richtung zum Brett hin verjüngt, wobei der Flüssigkeitsfilm jeweils gleich breit oder breiter als das Brett ist und vorzugsweise das Brett unter den Abgabebehältern hindurchbewegt wird, wobei die Flüssigkeit als fallender Fließvorhang aus dem Abgabebehälter abgegeben wird, vorteilhaft durchgeführt werden kann, wenn die Längswände des Abgabebehälters siebförmig ausgebildet sind, derart, daß die Flüssigkeit nach dem Durchtreten eine geschlossene Fläche auf der Außenseite des Siebs bzw. Lochblechs bildet und von der tiefsten Stelle den fallenden Fließvorhang bildet.It has now been found that the formation of a liquid film on a board, in particular a glue and hardener film on a preferably elongated board intended for the production of wooden structures, by pouring at least one liquid by means of at least one dispensing container arranged above the board and transverse to its direction of movement , the width of which tapers towards the board, the liquid film being in each case the same width or width as the board and preferably the board being moved under the dispensing containers, the liquid being dispensed from the dispensing container as a falling flow curtain, can advantageously be carried out, if the longitudinal walls of the dispenser are sieve-shaped, such that the liquid forms a closed surface on the outside of the sieve or perforated plate after passing through and forms the falling flow curtain from the lowest point.

Weitere Einzelheiten und Vorteile der erfindungsgemäßen Vorrichtung sind nachfolgend in der Beschreibung und Zeichnung erläutert.Further details and advantages of the device according to the invention are explained below in the description and drawing.

Dabei zeigen

  • Figur 1 einen schematischen Aufbau der Vorrichtung
  • Figuren 2 und 3 jeweils eine besondere Ausführungsform des Abgabebehälters 6.
Show
  • Figure 1 shows a schematic structure of the device
  • FIGS. 2 and 3 each show a special embodiment of the dispensing container 6.

Die für dieses Verfahren geeignete Vorrichtung, die vorzugsweise stationär betrieben wird, besteht im wesentlichen aus Vorratsbehältern 1 für Leim bzw. Härter, mit den jeweiligen Vorratsbehältern leitungsmäßig verbundenen, oberhalb des Bretts 2 angeordneten Abgabebehältern, unterhalb des Bretts angeordneten Auffangbehältern 3, sowie gegebenenfalls jeweils einer für die Rückführung von Leim und Härter bestimmten Verbindungsleitung 4 und jeweils einer in der Verbindungsleitung angeordneten Pumpe 5, wobei mindestens einer der Abgabebehälter als trogförmiger Abgabebehälter 6 ausgebildet ist, dessen Breite sich in Richtung zum Brett hin verjüngt und dessen Längswände 7, 7' siebförmig ausgebildet sind und an ihrer tiefsten Stelle eine Ablaufkante 8 aufweisen.The device suitable for this process, which is preferably operated in a stationary manner, essentially consists of storage containers 1 for glue or hardener, with the respective storage containers connected in line with the respective storage containers, arranged above the board 2, dispensing containers 3 arranged below the board, and optionally one each for the return of glue and hardener connecting line 4 and in each case one pump 5 arranged in the connecting line, at least one of the dispensing containers being designed as a trough-shaped dispensing container 6, the width of which tapers towards the board and the longitudinal walls 7, 7 'of which are sieve-shaped are and have a drain edge 8 at their lowest point.

Eine besondere Ausführung des Abgabebehälters besteht darin, daß er die Form eines dreiseitigen Prismas besitzt, wobei die beiden schrägstehenden Längswände 7, 7' das Sieb oder Lochblech darstellen, deren Schnittgerade die Ablaufkante 8 bildet und die obere Seite des Abgabebehälters mit einem Zulauf 11 versehen ist.A special embodiment of the dispensing container is that it has the shape of a three-sided prism, the two inclined longitudinal walls 7, 7 'representing the sieve or perforated plate, the line of intersection of which forms the drain edge 8 and the upper side of the dispensing container is provided with an inlet 11 .

Da der entstehende Flüssigkeitsvorhang die Neigung hat sich zusammenzuziehen, kann er an seinen Rändern geführt und stabilisiert werden. Dies kann mit Hilfe von in an sich bekannter Weise wirkenden starren oder elastischen Stäben 9, 9' geschehen, die sich an den beiden Enden der Ablaufkante befinden. Eine andere Möglichkeit besteht darin, den Flüssigkeitsvorhang durch besondere, in ihrer Größe regulierbare Austrittsöffnungen 10, 10', die an beiden Enden der Ablaufkante sitzen, zu führen und zu stabilisieren. Durch die beiden Austrittsöffnungen, die die Form von Löchern oder Schlitzen haben können, tritt im Vergleich zu den kleineren Sieb- bzw. Lochblechöffnungen pro Zeiteinheit mehr Flüssigkeit aus. Dadurch werden zwei, den Flüssigkeitsvorhang begrenzende, Flüssigkeitsstränge ausgebildet. Diese Art der Führung des Flüssigkeitsvorhangs kann im Einzelfall gegenüber der mit Leitstäben den Vorteil einer geringeren Störanfälligkeit haben.Since the resulting liquid curtain has a tendency to contract, it can be guided and stabilized at its edges. This can be done with the aid of rigid or elastic rods 9, 9 'which act in a manner known per se and which are located at the two ends of the trailing edge. Another possibility is to guide and stabilize the liquid curtain through special, adjustable in size outlet openings 10, 10 ', which are located at both ends of the trailing edge. Through the two outlet openings, which can have the shape of holes or slots, Compared to the smaller sieve or perforated plate openings, more liquid escapes per unit of time. As a result, two liquid strands delimiting the liquid curtain are formed. In individual cases, this type of guiding the liquid curtain can have the advantage of being less susceptible to faults than with guide rods.

Die Durchflußmenge der Flüssigkeit wird im allgemeinen durch die Förderleistung der Pumpe 12 reguliert. Um beispielsweise bei der Ausführung des Abgabebehälters als offener Trog einen hohen Flüssigkeitsauftrag auf dem Brett zu erhalten, erhöht man die Förderleistung der Pumpe. Dadurch wird mehr Flüssigkeit in den Siebtrog gefördert, wobei sich gleichzeitig die Flüssigkeitsaustrittsfläche vergrößert. Es tritt jeweils eine bestimmte Flüssigkeitsmenge, die vom Flüssigkeitsvolumen im Sieb abhängig ist, durch die Siebfläche aus, d. h. es stellt sich ein dynamisches Gleichgewicht ein.The flow rate of the liquid is generally regulated by the delivery rate of the pump 12. In order, for example, to obtain a high liquid application on the board when the delivery container is designed as an open trough, the pump output is increased. As a result, more liquid is conveyed into the sieve trough, and at the same time the liquid outlet area increases. A certain amount of liquid, which is dependent on the liquid volume in the sieve, exits through the sieve surface, i. H. there is a dynamic balance.

Die Austrittsmenge kann weiterhin vergrößert werden, indem man einen geschlossenen Abgabebehälter vorsieht (Figur 3). Auf diese Weise wird wird die aus dem Sieb austretende Flüssigkeitsmenge dem Pumpendruck im wesentlichen proportional.The amount of discharge can be further increased by providing a closed delivery container (Figure 3). In this way, the amount of liquid emerging from the sieve becomes essentially proportional to the pump pressure.

Je nach Viskosität der Flüssigkeit können Siebe oder Lochbleche mit unterschiedlicher Maschenweite benutzt werden. Beispielsweise lassen sich Siebe aus Maschendraht mit Weiten von 1 bis 6 mm verwenden.Depending on the viscosity of the liquid, sieves or perforated plates with different mesh sizes can be used. For example, wire mesh sieves with a width of 1 to 6 mm can be used.

Beim erfindungsgemäßen Verfahren können Leim und Härter sowohl getrennt, wie auch als Mischung aufgetragen werden. Beim getrennten Auftrag, der die bevorzugte Arbeitsweise darstellt, können der überschüssige Leim und der Härter mittels Pumpen in Vorratsbehälter zurückgeführt werden.In the process according to the invention, glue and hardener can be applied either separately or as a mixture. In the case of separate application, which is the preferred method of working, the excess glue and the hardener can be returned to the storage container by means of pumps.

Das erfindungsgemäße Verfahren erlaubt den Einsatz von verschiedenartigen flüssigen Leimen, z. B. von Aminoplast- oder Phenoplastharzen wie Formaldehyd-Harnstoff-Kondensate. Formaldehyd-Harnstoff-Meiamin-Kondensate, Formaldehyd-Harnstoff-Melamin-Phenol-Kondensate, Formaldehyd-Phenol-Kondensate oder Formaldehyd-Phenoi/Resorcin-Kondensate.The inventive method allows the use of various types of liquid glues, for. B. of aminoplast or phenolic resins such as formaldehyde-urea condensates. Formaldehyde-urea-melamine condensates, formaldehyde-urea-melamine-phenol condensates, formaldehyde-phenol condensates or formaldehyde-phenoi / resorcinol condensates.

Leime und Härter sind hierzu sowohl in thixotropen wie auch in nicht thixotropen Einstellungen verwendbar - bei nicht thixotropen Einstellungen sollte gegebenenfalls der Härter viskos sein - und können in reiner Form oder auch zusammen mit an sich bekannten zusätzlichen Hilfsmitteln eingesetzt werden.Glues and hardeners can be used for this in both thixotropic and non-thixotropic settings - in the case of non-thixotropic settings, the hardener should be viscous if necessary - and can be used in pure form or together with additional aids known per se.

Durch das erfindungsgemäße Verfahren ist sichergestellt, daß, wenn Leim und Härter getrennt aufgetragen werden, beide Komponenten stets miteinander in Berührung kommen.The method according to the invention ensures that when the glue and hardener are applied separately, both components always come into contact with one another.

Beim getrennten Auftrag der beiden Komponenten mischen diese sich beim Zusammenlegen der Bretter besser, als es z. B. bei einem getrennten Leim-Härter-Auftrag in Form von Schnüren der Fall ist.When the two components are applied separately, they mix better when the boards are put together than, e.g. B. is the case with a separate glue hardener application in the form of cords.

BeispieleExamples

Als Gießvorrichtung wurde ein metallener Abgabebehälter in Form eines dreiseitigen Prismas verwendet, dessen Kantenlänge der Stirnwände jeweils 15 cm und die der beiden schrägstehenden, siebförmigen Längswände jeweils 45 cm betrugen. Die Siebflächen bestanden aus Maschendraht mit einer Maschenweite von 2 mm. Zur Stabilisierung des Films befanden sich an den beiden unteren Enden der Ablaufkante starre, nach unten weisende Metallstäbe.A metal dispensing container in the form of a three-sided prism was used as the casting device, the edge length of the end walls in each case being 15 cm and that of the two inclined, sieve-shaped longitudinal walls in each case 45 cm. The sieve surfaces consisted of wire mesh with a mesh size of 2 mm. To stabilize the film, rigid, downward-facing metal rods were located at the two lower ends of the drain edge.

Gegossen wurde in Beispiel 1 ein Resorcinharz und getrennt davon ein thixotrop eingestellter flüssiger Härter und in Beispiel 2 ein thixotrop eingestelltes Resorcinharz und getrennt davon ein thixotrop eingestellter flüssiger Härter.A resorcinol resin and, separately, a thixotropic liquid hardener were cast in Example 1 and, in Example 2, a resorcinol resin, thixotropically adjusted and a thixotropic liquid hardener separately.

Bei einem Leim-Härter-Auftrag von ca. 550 g/m2 auf die mit einer Vorschubgeschwindigkeit von ca. 100 m/min bewegten Probeholzstücke war der entstehende Leim- bzw. Härter-Film in beiden Beispielen sofort gut ausgebildet und ergab auf der Oberfläche der Probeholzstücke eine Schicht von gleichmäßiger Dicke.With a glue-hardener application of approx. 550 g / m 2 onto the test wood pieces moved at a feed speed of approx. 100 m / min, the resulting glue or hardener film was immediately well developed in both examples and gave on the surface the test wood pieces a layer of uniform thickness.

Es wurde dabei in Beispiel 1 folgender Leim bzw. Härter eingesetzt :

  • a) eine wäßrige Lösung eines Phenol-Resorcin-Formaldehyd-Kondensationsproduktes mit einem Trockengehalt von ca. 50 %, einer Dichte von ca. 1,12 g/cm3 und einer Viskosität von ca. 400 mPa . s.
  • b) ein flüssiger Härter auf Formaldehydbasis. Dem Härter war ein Thixotropiermittel zugesetzt.
The following glue or hardener was used in Example 1:
  • a) an aqueous solution of a phenol-resorcinol-formaldehyde condensation product with a dry content of approx. 50%, a density of approx. 1.12 g / cm 3 and a viscosity of approx. 400 mPa. s.
  • b) a liquid hardener based on formaldehyde. A thixotropic agent was added to the hardener.

In Beispiel 2 wurde der unter Beispiel 1 beschriebene Leim bzw. Härter verwendet, wobei dem Leim ebenfalls ein Thixotropiermittel zugesetzt war.In example 2, the glue or hardener described in example 1 was used, a thixotropic agent likewise being added to the glue.

Claims (7)

1. A process for the formation of a film of liquid on a board, especially a film of glue and hardener on a preferably elongate board (2) intended for the production of wooden load-bearing structures, by casting at least one liquid by means of at least one dispensing vessel (6) which is arranged above the board and transverse to the direction of travel of the latter, and which tapers in width towards the board, the film of liquid being as wide as, or wider than, the board, the board (2) being preferably passed beneath the dispensing vessel (6), the liquid being supplied from the dispensing vessel (6) in the form of a falling curtain, wherein the longitudinal walls (7, 7') of the dispensing vessel (6) are of sieve-like construction, so that the liquid, after passing therethrough, forms a coherent film on the outside of the sieve or perforated plate and a falling curtain as it runs off at the lowest point.
2. A process for the formation of a film of glue and hardener as claimed in claim 1, wherein the glue and hardener are cast separately from one another, the excess glue and the hardener being recycled to stock vessels (1) by means of pumps (5).
3. A process for the formation of a film of glue and hardener as claimed in claim 1, wherein a glue/hardener mixture is cast.
4. An apparatus for carrying out the process as claimed in claim 1, comprising stock vessels (1) for one or more liquids, especially for glue. and hardener, dispensing vessels arranged above the board (2) and connected by lines to the respective stock vessels, collecting vessels (3) arranged below the board, and, if desired, two connecting lines (4), one for recycling the glue and one for recycling the hardener, and a pump (5) located in each connecting line, at least one of the dispensing vessels being in the form of a trough-shaped dispensing vessel (6) which tapers in width towards the board, wherein its longitudinal walls (7, 7') are of sieve-like construction and form a run-off edge (8) at their lowest point.
5. An apparatus as claimed in claim 4, wherein the dispensing vessel (6) has the shape of a triangular prism, the two inclined longitudinal walls (7, 7') constituting the sieve or perforated plate and the line of intersection of these walls forming the run-off edge (8), while the upper closed side of the dispensing vessel is provided with a feed connection (11).
6. An apparatus as claimed in claims 4 and 5, wherein there are provided, at both ends of the run-off edge, downward-pointing, rigid or flexible rods (9, 9') which have a conventional mode of action and guide and stabilize the glue and hardener film at its edges.
7. An apparatus as claimed in claims 4 and 5, wherein there are provided, at both ends of the run-off edge, special outlet orifices (10, 10') in the form of holes or slots whose size can be adjusted and from which more glue and hardener issues per unit time than from the smaller sieve meshes or perforated plate orifices, thereby forming two glue and hardener strands which bound the glue and hardener film and guide and stabilize it at its edges.
EP83104999A 1982-05-29 1983-05-20 Process for the production of a glue film and a hardener film, and device for carrying out the process Expired EP0095678B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83104999T ATE29399T1 (en) 1982-05-29 1983-05-20 METHOD FOR FORMING A GLUE AND HARDENER FILM AND DEVICE FOR PERFORMING THE METHOD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3220379 1982-05-29
DE19823220379 DE3220379A1 (en) 1982-05-29 1982-05-29 METHOD FOR TRAINING A GLUE AND HARDENER FILM AND DEVICE FOR CARRYING OUT THE METHOD

Publications (3)

Publication Number Publication Date
EP0095678A2 EP0095678A2 (en) 1983-12-07
EP0095678A3 EP0095678A3 (en) 1985-09-11
EP0095678B1 true EP0095678B1 (en) 1987-09-09

Family

ID=6164870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104999A Expired EP0095678B1 (en) 1982-05-29 1983-05-20 Process for the production of a glue film and a hardener film, and device for carrying out the process

Country Status (5)

Country Link
EP (1) EP0095678B1 (en)
AT (1) ATE29399T1 (en)
DE (2) DE3220379A1 (en)
DK (1) DK169424B1 (en)
NO (1) NO170915C (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3612973A1 (en) * 1986-04-17 1987-10-29 Basf Ag DEVICE FOR APPLYING GLUE TO WOOD PARTS
DE3712347A1 (en) * 1987-04-11 1988-10-20 Basf Ag DEVICE FOR APPLYING GLUE TO WOOD PARTS
DE3834027A1 (en) * 1988-10-06 1990-04-12 Basf Ag METHOD FOR APPLYING A READY-TO-USE GLUE TO THE SURFACE OF WOODEN PARTS
GB2255518A (en) * 1991-04-24 1992-11-11 Carrs Paints Limited Process for applying surface coating
DE19644156A1 (en) * 1996-10-24 1998-04-30 Sika Chemie Gmbh Application of adhesive to one side of jointing strip
DE19716466A1 (en) * 1997-04-21 1998-10-22 Bachofen & Meier Ag Method and device for applying dispersions to a material web
US6458417B2 (en) 2000-07-07 2002-10-01 Akzo Nobel N.V. Method of gluing
CN102935420B (en) * 2011-08-15 2014-06-25 浙江瑞翌新材料科技有限公司 Method and system for sand planting of diamond wire saw
CN109225751A (en) * 2018-09-08 2019-01-18 徐州东宁胶业有限公司 A kind of sizer of glue

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1735852U (en) * 1955-12-17 1956-12-13 Kasika Chem Fab G M B H DEVICE FOR THE PRODUCTION OF COATINGS OR FILMS FROM PLASTIC.
GB938084A (en) * 1960-11-07 1963-09-25 Talent Europ Company Ltd Improvements in the production of polyester resin coatings
DE1918462A1 (en) * 1969-04-11 1970-10-15 Buerkle & Co Robert Lacquer casting machine for the coating of plate-shaped workpieces
SE364459B (en) * 1972-10-27 1974-02-25 Casco Ab
DE2416032C3 (en) * 1974-03-27 1982-04-01 Aktiebolaget Casco, Stockholm Method for gluing wooden parts

Also Published As

Publication number Publication date
ATE29399T1 (en) 1987-09-15
DK238583D0 (en) 1983-05-27
DK169424B1 (en) 1994-10-31
DK238583A (en) 1983-11-30
NO170915C (en) 1992-12-30
DE3373423D1 (en) 1987-10-15
EP0095678A2 (en) 1983-12-07
NO170915B (en) 1992-09-21
NO831902L (en) 1983-11-30
EP0095678A3 (en) 1985-09-11
DE3220379A1 (en) 1983-12-01

Similar Documents

Publication Publication Date Title
EP0115621B1 (en) Process and apparatus for the stabilisation of free falling liquid curtains
EP0095678B1 (en) Process for the production of a glue film and a hardener film, and device for carrying out the process
DE3723149A1 (en) DEVICE FOR APPLYING A LIQUID TO A CARRIER
DE2035081B2 (en) Device for the continuous application of a smoothing or strengthening agent to a running textile thread
DE2403313C3 (en) Device for the simultaneous application of at least two layers of liquid coating materials to a surface of an item, in particular a strip
DE2703680C3 (en) Applicator for flowable, foaming reaction mass
DE60123243T2 (en) GLUE PROCESSING AND MACHINE
DE2839210A1 (en) COATING DEVICE
DE3907846B4 (en) Coating apparatus and method for applying a coating medium to a continuous flexible carrier
DE2507154C2 (en) Extrusion head
DE3438041C2 (en) Air knife coater
DE102006026124A1 (en) Method and device for gluing particles in the region of a blower tube
DE3014272A1 (en) DEVICE FOR HOMOGENOUSLY MIXING COMPACT SOLIDS WITH FLOWING WATER
DE3037612A1 (en) Photographic solution pouring device - has edge strips with low perpendicular surfaces followed by surfaces sloping upwards
DE2947348C2 (en)
WO2008058911A1 (en) Method and devices for separate application of a liquid multicomponent adhesive system
DE2812946B2 (en) Device for coating an endless web
DE3404658C2 (en)
DE2205603A1 (en) AUTOMATED CONVEYOR BELT FOR PLASTER CASTINGS
EP0548758B1 (en) Board and method to manufacture it
DE3416722A1 (en) DEVICE FOR ONE-SIDED OR TWO-SIDED COATING OF A VERTICAL RUNNING TRAIN
DE3139740A1 (en) "DEVICE FOR COATING COATING"
DE2416032A1 (en) Laminating wood prods with liq hardenable resin and liq hardener - by consecutive appln of resin hardener to reduce risk of premature drying
DE1900797A1 (en) Coating device
DE3612973A1 (en) DEVICE FOR APPLYING GLUE TO WOOD PARTS

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE CH DE FR IT LI NL SE

17P Request for examination filed

Effective date: 19850727

17Q First examination report despatched

Effective date: 19860319

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR IT LI NL SE

REF Corresponds to:

Ref document number: 29399

Country of ref document: AT

Date of ref document: 19870915

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: ING. C. GREGORJ S.P.A.

REF Corresponds to:

Ref document number: 3373423

Country of ref document: DE

Date of ref document: 19871015

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19930420

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19940521

EUG Se: european patent has lapsed

Ref document number: 83104999.4

Effective date: 19941210

EUG Se: european patent has lapsed

Ref document number: 83104999.4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19980512

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990531

BERE Be: lapsed

Owner name: BASF A.G.

Effective date: 19990531

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020412

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20020415

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20020422

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20020423

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020518

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20030519

Ref country code: CH

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20030519

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20030520

Ref country code: AT

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20030520

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV7 Nl: ceased due to reaching the maximum lifetime of a patent

Effective date: 20030520