EP0000058A1 - Process and apparatus for continuously moulding foamed slabs of rectangular cross-section - Google Patents

Process and apparatus for continuously moulding foamed slabs of rectangular cross-section Download PDF

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Publication number
EP0000058A1
EP0000058A1 EP78100100A EP78100100A EP0000058A1 EP 0000058 A1 EP0000058 A1 EP 0000058A1 EP 78100100 A EP78100100 A EP 78100100A EP 78100100 A EP78100100 A EP 78100100A EP 0000058 A1 EP0000058 A1 EP 0000058A1
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EP
European Patent Office
Prior art keywords
reaction mixture
zone
block
foam
rectangular cross
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.)
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EP78100100A
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German (de)
French (fr)
Inventor
Alberto Carlos Dr. Gonzalez-Dörner
Hansjürgen Dr. Rabe
Günter Dr. Hauptmann
Karl Josef Dr. Kraft
Manfred Dr. Roegler
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Bayer AG
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Bayer AG
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Publication date
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Publication of EP0000058A1 publication Critical patent/EP0000058A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/461—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length dispensing apparatus, e.g. dispensing foaming resin over the whole width of the moving surface
    • B29C44/462—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length dispensing apparatus, e.g. dispensing foaming resin over the whole width of the moving surface provided with pre-foaming devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/467—Foam spreading or levelling devices

Definitions

  • the invention relates to a method and a device for the continuous production of foam blocks with a rectangular cross-section from a foamable reaction mixture, in particular based on polyurethane, the reaction mixture being fed into a continuous trough in which the reaction mixture foams to form a block.
  • Block foam is usually cut to the appropriate size into cushioning material, insulating material, foil material, etc.
  • the purpose of producing endless foam blocks with a rectangular cross section is to reduce the amount of waste.
  • a block foaming system is known in which the reactive mixture is fed into the bottom of a trough, which is at the inlet current of a conveyor is arranged.
  • the mixture already reacts in the trough to a state in which it is just still flowable, and reaches a sloping plane via a weir, which is arranged in the foaming zone and over which a base film is passed.
  • This inclined plane is inclined in such a way that the surface of the resulting foam block runs horizontally or is aligned parallel to the inclination of the actual conveyor belt which follows the inclined plane and which is inclined approximately between 3 and 10 °.
  • a block with a rectangular cross-section is created; however, it has a leather-like skin on the surface.
  • the block height is not much larger than about half the block width.
  • a block foaming system is known from DT-OS 2 12.3 21c (corresponds to US Pat. No. 3,924 925), in which the surface of the resulting block is covered with a cover film along the foaming zone and leveled transversely to the conveying direction by means of a leveling device.
  • This avoids the formation of leather-like skin; as a block height, however, a height is also only slightly above half the block width. It has proven to be disadvantageous that the bottom zone of the foam block has a higher compression, so that special attention must be paid to this deficiency in the further processing of the foam.
  • the object of the invention is a method and a device with which one can produce endless foam blocks, the height of which is substantially greater than half the block width and have a homogeneous cross section, and also largely have the same density as the core in the bottom zone and in the top zone.
  • the reaction mixture is allowed to react before application and the block surface is kept level by the downward reaction of the applied reaction mixture in the foaming zone on the conveying surface or the cover sheet conveyed thereon
  • the reaction foams in the method according to the invention Mix up beyond that level so that ideally the angle of inclination of the conveying surface and the angle of rise of the foam surface in the foaming zone are the same.
  • the process according to the invention is suitable for the production of endless foam blocks made of polyurethane, polycarbodiimide polyisocyanurate or combinations of these plastics.
  • Paper sheets made of normal or plastic-coated kraft paper are used as top or bottom and side foils.
  • Nonwovens, textile webs as well as plastic films and foam films, metal films and combinations of these materials are also used.
  • the more noble materials are only used if the top and / or bottom layer of the foam block is to be used for a particular purpose as a product laminated with the top layer.
  • the invention is based on a device consisting of a mixture feed device and a conveyor with side boundaries and unwinding stations for bottom, side and cover foils.
  • the intermediate storage trough can, as already described in relation to the prior art, be arranged in front of the inlet end of a conveyor.
  • the intermediate storage trough can also be provided on the inlet end of a conveyor.
  • the conveying surface is inclined downwards in the Aufsenosumzone.
  • the inclination can vary over the length of the conveying surface in order to adapt it to the degree of foaming over time.
  • the conveyor surface can be designed, for example, as a stationary, possibly multi-part plate or as a separate conveyor belt to which the actual conveyor belt is connected. However, only a single conveyor belt can also be provided, the first part of which is guided at a corresponding incline.
  • a slatted frame which is particularly lightweight, is preferably used as the leveling device.
  • pressure plates can also be provided which are elastically suspended perpendicular to the conveying direction. Skids arranged transversely to the conveying direction and provided with counterweights are also known. Also a circumferential band, the lower strand of which loosely on the surface of the Ge being foamed mixed down, was already used.
  • Such a belt can consist of a rubberized fabric belt, but can also be constructed in the manner of an endless, slatted frame.
  • the feed device and leveling device are preferably designed to be adjustable in width in a manner known per se.
  • the feed device 1 consists of a mixing head 2 and a trough 3, in the lower area of which leads away from the mixing head 2 feed line 4.
  • An inclined conveying surface 6 is arranged in the foaming zone 5. It consists of a circumferential belt 7, the upper run 8 is backed with adjustable plates 9, 10, 11, so that, seen over the length, the conveying surface 6 has different angles of inclination.
  • a tensioning device 12 ensures constant tension of the belt 7.
  • the actual conveyor belt 13 connects to the belt 7.
  • An insert 14 bridges the gap between the two belts 7, 13.
  • the belts 7, 13 are covered by a base film 15, onto which the mixture which has reacted in the trough 3 is fed.
  • the bands 7, 13 are delimited by side boundaries 16 (only the rear one is shown) which are covered with side foils 17.
  • a cover film 18 is placed on the foaming mixture at the beginning of the foaming zone 5 and guided under a leveling device 19. It consists of a slatted frame 20 which is suspended from a frame 22 by means of belts 21. The height of the block 23 corresponds to its width of 2 m.
  • the feed device 31 consists of a mixing head 32 and a trough 33, to which the reaction mixture is fed from above via a transverse distributor pipe 34 and a guide plate 35. Finally, the mixture passes through a feed plate 36 onto the base sheet 37, which is guided over a table 38 in this area.
  • the bottom film 37 then reaches a conveying surface 40 which is arranged in the foaming zone 39 and is designed as an angle-adjustable plate. Behind it is the actual conveying belt 41 which is correspondingly height-adjustable in order to be able to adapt it to the angular setting of the conveying surface 40.
  • a cover film 42 is placed on the surface of the reaction mixture and carried out under a leveling device 43.
  • the finished block 50 has a width of 2.10 m and a height of 1.80 m.

Abstract

Foamed slabs (50), the height of which corresponds approximately to their width, are produced by allowing the reaction mixture an initial reaction in an intermediate storage trough (33), then feeding it to the expansion zone (39) and guiding it obliquely downwards at between 0 DEG and 60 DEG , and by levelling the surface along the expansion zone (39). <IMAGE>

Description

Die Erfindung richtet sich auf ein Verfahren und eine Vorrichtung zum kontinuierlichen Herstellen von Schaumstoffblöcken mit Rechteckquerschnitt aus einem schäumfähigen Reaktionsgemisch, insbesondere auf Basis Polyurethan, wobei das Reaktionsgemisch einem fortlaufenden Trog, in dem das Reaktionsgemisch zum Block aufschäumt, aufgegeben wird.The invention relates to a method and a device for the continuous production of foam blocks with a rectangular cross-section from a foamable reaction mixture, in particular based on polyurethane, the reaction mixture being fed into a continuous trough in which the reaction mixture foams to form a block.

Blockschaumstoff wird in der Regel auf entsprechende Größe zu Polstermaterial, Isoliermaterial, Folienmaterial usw. zerschnitten.Block foam is usually cut to the appropriate size into cushioning material, insulating material, foil material, etc.

Zweck des Herstellens von endlosen Schaumstoffblöcken mit Reckteckquerschnitt ist der geringere Verschnitt.The purpose of producing endless foam blocks with a rectangular cross section is to reduce the amount of waste.

Es sind mehrere Verfahren und Vorrichtungen entwickelt worden, mit denen sich Rechteckblöcke kontinuierlich fertigen lassen.Several methods and devices have been developed with which rectangular blocks can be continuously manufactured.

Nach der DT-OS 2 142 450 (entspricht US-PS 3 786 122) ist eine Blockschäumanlage bekannt, bei der das reaktionsfähige Gemisch am Boden eines Troges eingegeben wird, der am Einlaufende eines Förderers angeordnet ist. Das Gemisch reagiert bereits im Trog bis zu einem Zustand, in dem es gerade noch fließfähig ist, und gelangt über ein Wehr auf eine schiefe Ebene, die in der Aufschäumzone angeordnet ist und über die eine Bodenfolie geführt ist. Diese schiefe Ebene ist derart geneigt, daß die Oberfläche des entstehenden Schaumstoffblockes horizontal verläuft bzw. parallel zur Neigung des eigentlichen, hinter der schiefen Ebene anschließenden Förderbandes, das etwa zwischen 3 und 10° geneigt ist, ausgerichtet ist. Es entsteht zwar ein Block mit Rechteckquerschnitt; er weist jedoch auf der Oberfläche eine lederartige Haut auf. Außerdem ist die Blockhöhe nicht viel größer als etwa die Hälfte der Blockbreite.According to DT-OS 2 142 450 (corresponds to US Pat. No. 3,786,122), a block foaming system is known in which the reactive mixture is fed into the bottom of a trough, which is at the inlet current of a conveyor is arranged. The mixture already reacts in the trough to a state in which it is just still flowable, and reaches a sloping plane via a weir, which is arranged in the foaming zone and over which a base film is passed. This inclined plane is inclined in such a way that the surface of the resulting foam block runs horizontally or is aligned parallel to the inclination of the actual conveyor belt which follows the inclined plane and which is inclined approximately between 3 and 10 °. A block with a rectangular cross-section is created; however, it has a leather-like skin on the surface. In addition, the block height is not much larger than about half the block width.

Andererseits ist eine Blockschäumanlage aus der DT-OS 2 12.3 21c (entspricht US-PS 3 924 925) bekannt, bei der entlang der Aufschäumzone die Oberfläche des entstehenden Blockes mit einer Deckfolie abgedeckt und mittels einer Egalisiervorrichtung quer zur Förderrichtung egalisiert wird. Damit ist zwar die Bildung der lederartigen Haut vermieden; als Blockhöhe wird jedoch ebenfalls nur eine Höhe erreicht, die geringfügig über der halben Blockbreite liegt. Als nachteilig hat sich erwiesen, daß die Bodenzone des Schaumstoffblockes höhere Verdichtung aufweist, so daß bei der Weiterverarbeitung des Schaumstoffes auf diesen Mangel besondere Rücksicht zu nehmen ist.On the other hand, a block foaming system is known from DT-OS 2 12.3 21c (corresponds to US Pat. No. 3,924 925), in which the surface of the resulting block is covered with a cover film along the foaming zone and leveled transversely to the conveying direction by means of a leveling device. This avoids the formation of leather-like skin; as a block height, however, a height is also only slightly above half the block width. It has proven to be disadvantageous that the bottom zone of the foam block has a higher compression, so that special attention must be paid to this deficiency in the further processing of the foam.

Aufgabe der Erfindung ist ein Verfahren und eine Vorrichtung, womit man endlose Schaumstoffblöcke herstellen kann, deren Höhe wesentlich größer ist als die halbe Blockbreite und die homogenen Querschnitt aufweisen sowie auch in der Bodenzone und in der Deckzone weitgehend die gleiche Dichte zeigen wie der Kern.The object of the invention is a method and a device with which one can produce endless foam blocks, the height of which is substantially greater than half the block width and have a homogeneous cross section, and also largely have the same density as the core in the bottom zone and in the top zone.

Aus verfahrenstechnischer Sicht wird diese Aufgabe gemäß der Erfindung durch die Kombination fclgender Schritte gelöst:

  • a) Das Reaktionsgemisch wird vor dem Auftragen anreagieren gelassen;
  • b) das aufgetragene Reaktionsgemisch wird in der Aufschäumzone unter einer Neigung zwischen 0 und 60°, bevorzugt zwischen 0 und 300, nach unten geführt;
  • c) entlang der Aufschäumzone wird die Oberfläche des aufsteigenden Schaumstoffs quer zur Förderrichtung egalisiert.
From a process engineering point of view, this object is achieved according to the invention by the combination of the following steps:
  • a) The reaction mixture is allowed to react before application;
  • b) the applied reaction mixture is guided downward in the foaming zone at an inclination between 0 and 60 °, preferably between 0 and 30 0 ;
  • c) along the foaming zone, the surface of the ascending foam is leveled transversely to the conveying direction.

Wie eingangs zum Stand der Technik nachgewiesen, sind die einzelnen Verfahrensschritte an sich bekannt. Für den Fachmann lag es jedoch nicht ohne weiteres auf der Hand, daß durch die Kombination dieser an sich bekannten Maßnahmen die gemäß der Erfindung angestrebte Wirkung eintreten mußte; denn zum Erzeugen von Blöcken, deren Höhe und Breite beispielsweise etwa die gleiche Größe besitzen, muß entweder bei Beibehaltung der bisher üblichen Bandgeschwindigkeiten etwa die doppelte Gemischmenge aufgetragen werden oder man reduziert die Bandgeschwindigkeit beim erfindungsgemäßen Verfahren auf die Hälfte. In beiden Fällen entsteht mit der erfindungsgemäßen Arbeitsweise im Vergleich mit den bisher bekannten Verfahren ein Gemischauftrag doppelter Stärke. Daraus mußte der Fachmann folgern, daß gerade wegen der größeren Aufschäumhöhe auf der Bodenzone eine größere Last ruht, die eigentlich eine noch höhere Dichte der Bodenzone verursachen müßte. Auch mußte davon ausgegangen werden, daß trotz der an sich bekannten Maßnahmen zum Vermeiden der Oberflächenwölbung wegen der größeren Blockhöhe eine solche Wölbung trotz Anwendung der erfindungsgemäßen Lehre auftreten mußte. Entgegen dem vorbekannten Verfahren, bei dem das Reaktionsgemisch vor dem Auftragen anreagieren gelassen wird und die Blockoberfläche eben gehalten wird, indem das aufgetragene Reaktionsgemisch in der Aufschäumzone auf der Förderfläche bzw. der darauf geförderten Deckfolie abwärts gefördert wird, schäumt beim erfindungsgemäßen Verfahren das Reaktionsgemisch über jenes Niveau weiter nach oben auf, so daß im Idealfall der Neigungswinkel der Förderfläche und der Anstiegswinkel der Schaumstoffoberfläche in der Aufschäumzone gleich groß sind.As demonstrated at the beginning of the prior art, the individual process steps are known per se. However, it was not immediately obvious to the person skilled in the art that the combination of these measures known per se had to have the desired effect according to the invention; because to produce blocks, the height and width of which are approximately the same size, for example, either twice the amount of mixture has to be applied while maintaining the previously usual belt speeds or the belt speed is reduced by half in the process according to the invention. In both cases, the procedure according to the invention results in a double thickness mixture application in comparison with the previously known methods. From this, the expert had to conclude that precisely because of the higher foaming height, a greater load rests on the bottom zone, which should actually cause an even higher density of the bottom zone. It also had to be assumed that despite the measures known per se for avoiding the surface curvature due to the greater block height, such a curvature had to occur despite the application of the teaching according to the invention. Contrary to the previously known method, in which the reaction mixture is allowed to react before application and the block surface is kept level by the downward reaction of the applied reaction mixture in the foaming zone on the conveying surface or the cover sheet conveyed thereon, the reaction foams in the method according to the invention Mix up beyond that level so that ideally the angle of inclination of the conveying surface and the angle of rise of the foam surface in the foaming zone are the same.

Die Erzeugung höherer Blöcke bringt geringeren Produktionsaufwand und weniger Verlust mit sich. Bei den bisher bekannten Verfahren war es notwendig, von der Boden- und der Deckzone jeweils etwa eine 2 cm dicke Schicht abzuschneiden, sofern das Blockmaterial für hohe Ansprüche verwendet werden sollte. Das erfindungsgemäße Verfähren erlaubt es, die Dicke der wegzuschneidenden Schichten geringer zu halten, d. h. etwa auf 1 cm zu reduzieren. Wird nun ein Block gefertigt, dessen Höhe der Breite entspricht, so spart man gegenüber den bisherigen Fertigungsverfahren, bei denen die Höhe etwa der halben Breite entsprach, 6 cm Schaumstoffdicke ein. 4 cm Schichtdicke werden eingespart, weil man nur einen Block fertigt, dessen Querschnittsfläche der Summe zweier Querschnittsflächen von nach den vorbekannten Verfahren gefertigten Blöcken entspricht. Die weiteren 2 cm eingesparte Schichtdicke ergeben sich aus der besseren Querschnittshomogenität in der Deck- und Bodenzone.Generating higher blocks results in less production effort and less loss. In the previously known methods, it was necessary to cut off a layer about 2 cm thick from the bottom and top zones, provided the block material was to be used for high demands. The method according to the invention makes it possible to keep the thickness of the layers to be cut away smaller, i. H. to reduce to about 1 cm. If a block is now manufactured, the height of which corresponds to the width, this saves 6 cm of foam compared to the previous manufacturing processes in which the height corresponded to approximately half the width. A layer thickness of 4 cm is saved because only one block is produced, the cross-sectional area of which corresponds to the sum of two cross-sectional areas of blocks produced according to the previously known methods. The additional layer thickness saved by 2 cm results from the better cross-sectional homogeneity in the top and bottom zones.

Das erfindungsgemäße Verfahren ist geeignet für die Herstellung von endlosen Schaumstoffblöcken aus Polyurethan, Polycarbodiimide Polyisocyanurat oder Kombinationen aus diesen Kunststoffen. Als Deck- oder Boden- und Seitenfolien finden Papierbahnen aus normalem oder kunststoffbeschichtetem Kraftpapier Anwendung. Auch Vliesstoffe, Textilbahnen sowie Kunststoffolien und Schaumstoffolien, Metallfolien sowie Kombinationen dieser Materialien finden ebenfalls Anwendung. Die edleren Materialien verwendet man nur, sofern man die Deck-und/oder Bodenschicht des Schaumstoffblockes als mit der Deckschicht kaschiertes Produkt einem besonderen Verwendungszweck zuführen will.The process according to the invention is suitable for the production of endless foam blocks made of polyurethane, polycarbodiimide polyisocyanurate or combinations of these plastics. Paper sheets made of normal or plastic-coated kraft paper are used as top or bottom and side foils. Nonwovens, textile webs as well as plastic films and foam films, metal films and combinations of these materials are also used. The more noble materials are only used if the top and / or bottom layer of the foam block is to be used for a particular purpose as a product laminated with the top layer.

Zur Durchführung des Verfahrens geht die Erfindung von einer Vorrichtung aus, bestehend aus einer Gemischaufgabevorrichtung und einem Förderer mit Seitenbegrenzungen sowie Abwickelstationen für Boden-, Seiten- und Deckfolien.To carry out the method, the invention is based on a device consisting of a mixture feed device and a conveyor with side boundaries and unwinding stations for bottom, side and cover foils.

Das Neue dabei ist die Kombination folgender Merkmale:

  • a) Die Aufgabevorrichtung ist mit einem Zwischenlagerungstrog ausgestattet;
  • b) in der Aufschäumzone ist die Förderfläche in einer Neigung von 0 bis 60°, vorzugsweise 0 bis 30°, einstellbar;
  • c) in der Aufschäumzone ist eine Egalisiervorrichtung angeordnet.
What is new is the combination of the following features:
  • a) The feeder is equipped with an intermediate storage trough;
  • b) in the foaming zone, the conveying surface can be set at an incline of 0 to 60 °, preferably 0 to 30 °;
  • c) a leveling device is arranged in the foaming zone.

Dabei kann der Zwischenlagerungstrog, wie bereits zum Stand der Technik beschrieben, vor dem Einlaufende eines Förderers angeordnet sein. Der Zwischenlagerungstrog kann aber auch auf dem Einlaufende eines Förderers vorgesehen sein.The intermediate storage trough can, as already described in relation to the prior art, be arranged in front of the inlet end of a conveyor. The intermediate storage trough can also be provided on the inlet end of a conveyor.

In der Aufsehäumzone ist die Förderfläche nach unten geneigt. Die Neigung kann über die Länge der Förderfläche unterschiedlich sein, um sie dem zeitlichen Aufschäumgrad anzupassen. Die Förderfläche kann beispielsweise als stationäre, gegebenenfalls mehrteilige Platte ausgebildet sein oder auch als separates Förderband, an das sich das eigentliche Förderband anschließt. Es kann aber auch nur ein einziges Förderband vorgesehen sein, dessen erster Teil entsprechend geneigt geführt ist.The conveying surface is inclined downwards in the Aufsehäumzone. The inclination can vary over the length of the conveying surface in order to adapt it to the degree of foaming over time. The conveyor surface can be designed, for example, as a stationary, possibly multi-part plate or as a separate conveyor belt to which the actual conveyor belt is connected. However, only a single conveyor belt can also be provided, the first part of which is guided at a corresponding incline.

Als Egalisiervorrichtung wird vorzugsweise ein Lattenrost verwendet, der besonders leicht gebaut ist. Es können aber auch Druckplatten vorgesehen sein, die senkrecht zur Förderrichtung elastisch aufgehängt sind. Quer zur Förderrichtung angeordnete und mit Gegengewichten versehene Kufen sind ebenfalls bekannt. Auch ein umlaufendes Band, dessen Untertrum lose auf die Oberfläche des im Aufschäumen begriffenen Gemisches herabhängt, fand schon Anwendung. Ein solches Band kann aus einem gummierten Gewebeband bestehen, aber auch nach Art eines endlosen umlaufenden Lattenrostes aufgebaut sein.A slatted frame, which is particularly lightweight, is preferably used as the leveling device. However, pressure plates can also be provided which are elastically suspended perpendicular to the conveying direction. Skids arranged transversely to the conveying direction and provided with counterweights are also known. Also a circumferential band, the lower strand of which loosely on the surface of the Ge being foamed mixed down, was already used. Such a belt can consist of a rubberized fabric belt, but can also be constructed in the manner of an endless, slatted frame.

Aufgabevorrichtung und Egalisiervorrichtung sind in an sich bekannter Weise vorzugsweise breiteneinstellbar ausgebildet.The feed device and leveling device are preferably designed to be adjustable in width in a manner known per se.

In einer Zeichnung ist die erfindungsgemäße Vorrichtung in zwei Ausführungsbeispielen rein schematisch dargestellt und nachstehend näher erläutert. Es zeigen:

  • Fig. 1 die Vorrichtung gemäß einem ersten Ausführungsbeispiel in der Seitenansicht und
  • Fig. 2 die Vorrichtung gemäß einem zweiten Ausführungsbeispiel in der Seitenansicht.
In one drawing, the device according to the invention is shown purely schematically in two exemplary embodiments and explained in more detail below. Show it:
  • Fig. 1 shows the device according to a first embodiment in side view
  • Fig. 2 shows the device according to a second embodiment in side view.

In Fig. 1 besteht die Aufgabevorrichtung 1 aus einem Mischkopf 2 und einem Trog 3, in dessen unteren Bereich die vom Mischkopf 2 wegführende Zuleitung 4 einmündet. In der Aufschäumzone 5 ist eine geneigte Förderfläche 6 angeordnet. Sie besteht aus einem umlaufenden Band 7, dessen Obertrum 8 mit verstellbaren Platten 9, 10, 11 hinterlegt ist, so daß, über die Länge gesehen, die Förderfläche 6 verschiedene Neigungswinkel aufweist. Eine Spannvorrichtung 12 sorgt für eine konstante Spannung des Bandes 7. An das Band 7 schließt das eigentliche Förderband 13 an. Ein Einsatzstück 14 überbrückt die Lücke zwischen den beiden Bändern 7, 13. Die Bänder 7, 13 sind von einer Bodenfolie 15 abgedeckt, auf die das im Trog 3 anreagierte Gemisch aufgegeben wird. Die Bänder 7, 13 sind durch Seitenbegrenzungen 16 (es ist nur die hintere dargestellt) begrenzt, die mit Seitenfolien 17 abgedeckt sind. Eine Deckfolie 18 wird auf das aufschäumende Gemisch am Anfang der Aufschäumzone 5 aufgelegt und unter einer Egalisiervorrichtung 19 hergeführt. Sie besieht aus einem Lattenrost 20, der mittels Gurten 21 an einem Rahmen 22 aufgehängt ist. Die Höhe des Blockes 23 entspricht seiner Breite von 2 m.In Fig. 1, the feed device 1 consists of a mixing head 2 and a trough 3, in the lower area of which leads away from the mixing head 2 feed line 4. An inclined conveying surface 6 is arranged in the foaming zone 5. It consists of a circumferential belt 7, the upper run 8 is backed with adjustable plates 9, 10, 11, so that, seen over the length, the conveying surface 6 has different angles of inclination. A tensioning device 12 ensures constant tension of the belt 7. The actual conveyor belt 13 connects to the belt 7. An insert 14 bridges the gap between the two belts 7, 13. The belts 7, 13 are covered by a base film 15, onto which the mixture which has reacted in the trough 3 is fed. The bands 7, 13 are delimited by side boundaries 16 (only the rear one is shown) which are covered with side foils 17. A cover film 18 is placed on the foaming mixture at the beginning of the foaming zone 5 and guided under a leveling device 19. It consists of a slatted frame 20 which is suspended from a frame 22 by means of belts 21. The height of the block 23 corresponds to its width of 2 m.

In Fig. 2 besteht die Aufgabevorrichtung 31 aus einem Mischkopf 32 und einem Trog 33, dem von oben über ein Querverteilerrohr 34 und ein Leitblech 35 das Reaktionsgemisch zugeführt wird. Schließlich gelangt das Gemisch über ein Aufgabeblech 36 auf die Bodenfolie 37, die in diesem Bereich über einen Tisch 38 geführt ist. Anschließend gelangt die Bodenfolie 37 auf eine in der Aufschäumzone 39 angeordnete, als winkeleinstellbare Platte ausgebildete Förderfläche 40. Dahinter ist das eigentliche Förderband 41 angeordnet, das entsprechend höhenverstellbar ist, um es an die Winkeleinstellung der Förderfläche 40 anpassen zu können. Am Beginn der Aufschäumzone 39 wird eine Deckfolie 42 auf die Oberfläche des Reaktionsgemisches aufgelegt und unter einer Egalisiervorrichtung 43 hergeführt. Diese besteht aus einem endlosen umlaufenden Band 44, dessen Obertrum 45 über Rollen 46 geführt ist und dessen Untertrum 47 locker herabhängt und die Oberfläche des aufsteigenden Schaumstoffes egalisiert. Die Seitenbegrenzungen 48 (es ist nur die hintere dargestellt) sind durch Seitenfolien 49 abgedeckt. Der fertige Block 50 besitzt eine Breite von 2,10 m und eine Höhe von 1,80 m.In Fig. 2, the feed device 31 consists of a mixing head 32 and a trough 33, to which the reaction mixture is fed from above via a transverse distributor pipe 34 and a guide plate 35. Finally, the mixture passes through a feed plate 36 onto the base sheet 37, which is guided over a table 38 in this area. The bottom film 37 then reaches a conveying surface 40 which is arranged in the foaming zone 39 and is designed as an angle-adjustable plate. Behind it is the actual conveying belt 41 which is correspondingly height-adjustable in order to be able to adapt it to the angular setting of the conveying surface 40. At the beginning of the foaming zone 39, a cover film 42 is placed on the surface of the reaction mixture and carried out under a leveling device 43. This consists of an endless circumferential band 44, the upper strand 45 is guided over rollers 46 and the lower strand 47 loosely hangs down and leveled the surface of the rising foam. The side boundaries 48 (only the rear one is shown) are covered by side foils 49. The finished block 50 has a width of 2.10 m and a height of 1.80 m.

Claims (2)

1. Verfahren zum kontinuierlichen Herstellen von Schaumstoffblöcken mit Rechteckquerschnitt aus einem schäumfähigen Reaktionsgemisch, insbesondere auf Basis Polyurethan, wobei das Reaktionsgemisch einem fortlaufenden Trog, in dem das Reaktionsgemisch zum Block aufschäumt, aufgegeben wird, gekennzeichnet durch die Kombination folgender Schritte: a) Das Reaktionsgemisch wird vor dem Auftragen anreagieren gelassen; b) das aufgetragene Reaktionsgemisch wird in der Aufschäumzone unter einer Neigung zwischen 0 und 60°, bevorzugt zwischen 0 und 30°, nach unten geführt; c) entlang der Aufschäumzone wird die Oberfläche des aufsteigenden Schaumstoffs quer zur Förderrichtung egalisiert. 1. A process for the continuous production of foam blocks with a rectangular cross-section from a foamable reaction mixture, in particular based on polyurethane, the reaction mixture being fed into a continuous trough in which the reaction mixture foams up to the block, characterized by the combination of the following steps: a) The reaction mixture is allowed to react before application; b) the applied reaction mixture is guided downward in the foaming zone at an incline between 0 and 60 °, preferably between 0 and 30 °; c) along the foaming zone, the surface of the ascending foam is leveled transversely to the conveying direction. 2. Vorrichtung zur Durchführung des Verfahrens, bestehend aus einer Gemischaufgabevorrichtung und einem Förderer mit Seitenbegrenzungen sowie Abwickelstationen für Boden-, Seiten-und Deokfolien, gekennzeichnet durch die Kombination folgender Merkmale: a) Die Aufgabevorrichtung (1, 31) ist mit einem Zwischenlagerungstrog (3, 33) ausgestattet; b) in der Aufschäumzone (5, 39) ist die Förderfläche (6, 40) in einer Neigung von 0 bis 60°, vorzugsweise 0 bis 30°, einstellbar; c) in der Aufschäumzone (5, 39) ist eine Egalisiervbrrichtung (19, 43) angeordnet. 2. Device for carrying out the method, consisting of a mixture feed device and a conveyor with side boundaries and unwinding stations for bottom, side and deodorant films, characterized by the combination of the following features: a) The feed device (1, 31) is equipped with an intermediate storage trough (3, 33); b) in the frothing zone (5, 39), the conveying surface (6, 40) can be set at an incline of 0 to 60 °, preferably 0 to 30 °; c) in the frothing zone (5, 39) a leveling device (19, 43) is arranged.
EP78100100A 1977-06-10 1978-06-06 Process and apparatus for continuously moulding foamed slabs of rectangular cross-section Withdrawn EP0000058A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19772726084 DE2726084A1 (en) 1977-06-10 1977-06-10 PROCESS AND DEVICE FOR THE CONTINUOUS PRODUCTION OF FOAM BLOCKS WITH RECTANGULAR CROSS-SECTION
DE2726084 1977-06-10

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EP0000058A1 true EP0000058A1 (en) 1978-12-20

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EP (1) EP0000058A1 (en)
JP (1) JPS544963A (en)
DE (1) DE2726084A1 (en)
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4255105A (en) * 1979-06-15 1981-03-10 Bayer Aktiengesellschaft Equipment for the continuous production of foam boards
US4264291A (en) * 1979-06-15 1981-04-28 Bayer Aktiengesellschaft Equipment for the continuous production of foam boards
US4267134A (en) * 1979-09-24 1981-05-12 The Upjohn Company Method and apparatus for smoothing foamed plastic core panelboard surface
US4270889A (en) * 1979-06-15 1981-06-02 Bayer Aktiengesellschaft Equipment for the continuous production of foam boards
US4347281A (en) * 1980-01-17 1982-08-31 Imperial Chemical Industries Limited Foam board having improved evenness and the method and apparatus for its continuous manufacture
US4530807A (en) * 1983-05-20 1985-07-23 Unifoam Ag Production of polymeric foam
US4559003A (en) * 1981-03-24 1985-12-17 Jean Poncet Apparatus for manufacturing webs of polymer foam and a product obtained
USRE33590E (en) * 1983-12-14 1991-05-21 Edap International, S.A. Method for examining, localizing and treating with ultrasound
WO1992000184A1 (en) * 1990-06-27 1992-01-09 Unifoam Ag Manufacture of polymeric foam
US5512222A (en) * 1995-03-15 1996-04-30 Foamex L.P. Method of using a chilled trough for producing slabs of polyurethane foam
GB2365814A (en) * 2000-08-08 2002-02-27 Cannon Viking Ltd Production of foamed materials

Citations (1)

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Publication number Priority date Publication date Assignee Title
US3553300A (en) * 1968-07-10 1971-01-05 Tenneco Chem Process for controlling the upper surface contour of foamable polyurethane during expansion in an open top mold

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3553300A (en) * 1968-07-10 1971-01-05 Tenneco Chem Process for controlling the upper surface contour of foamable polyurethane during expansion in an open top mold

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4255105A (en) * 1979-06-15 1981-03-10 Bayer Aktiengesellschaft Equipment for the continuous production of foam boards
US4264291A (en) * 1979-06-15 1981-04-28 Bayer Aktiengesellschaft Equipment for the continuous production of foam boards
US4270889A (en) * 1979-06-15 1981-06-02 Bayer Aktiengesellschaft Equipment for the continuous production of foam boards
US4267134A (en) * 1979-09-24 1981-05-12 The Upjohn Company Method and apparatus for smoothing foamed plastic core panelboard surface
US4347281A (en) * 1980-01-17 1982-08-31 Imperial Chemical Industries Limited Foam board having improved evenness and the method and apparatus for its continuous manufacture
US4559003A (en) * 1981-03-24 1985-12-17 Jean Poncet Apparatus for manufacturing webs of polymer foam and a product obtained
US4530807A (en) * 1983-05-20 1985-07-23 Unifoam Ag Production of polymeric foam
USRE33590E (en) * 1983-12-14 1991-05-21 Edap International, S.A. Method for examining, localizing and treating with ultrasound
WO1992000184A1 (en) * 1990-06-27 1992-01-09 Unifoam Ag Manufacture of polymeric foam
AU635853B2 (en) * 1990-06-27 1993-04-01 Unifoam A.G. Manufacture of polymeric foam
US5393361A (en) * 1990-06-27 1995-02-28 Unifoam A.G. Manufacture of polymeric foam
US5512222A (en) * 1995-03-15 1996-04-30 Foamex L.P. Method of using a chilled trough for producing slabs of polyurethane foam
GB2365814A (en) * 2000-08-08 2002-02-27 Cannon Viking Ltd Production of foamed materials
GB2365814B (en) * 2000-08-08 2003-10-29 Cannon Viking Ltd Foam plastics method and machine
US7179410B2 (en) 2000-08-08 2007-02-20 Cannon Viking Limited Foam plastics manufacturing method and machine

Also Published As

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IT7824356A0 (en) 1978-06-08
JPS544963A (en) 1979-01-16
DE2726084A1 (en) 1979-01-04
ES470664A1 (en) 1979-02-16

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