EP0295441A2 - Process for continuously making moulded articles, in particular panels, and apparatus for performing the process - Google Patents

Process for continuously making moulded articles, in particular panels, and apparatus for performing the process Download PDF

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Publication number
EP0295441A2
EP0295441A2 EP88107896A EP88107896A EP0295441A2 EP 0295441 A2 EP0295441 A2 EP 0295441A2 EP 88107896 A EP88107896 A EP 88107896A EP 88107896 A EP88107896 A EP 88107896A EP 0295441 A2 EP0295441 A2 EP 0295441A2
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EP
European Patent Office
Prior art keywords
tape
band
forming
cover
belt
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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Application number
EP88107896A
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German (de)
French (fr)
Inventor
Maschinenbau Hofmann Gm Wurtex
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.)
"wuertex" Maschinenbau Hofmann & Co GmbH
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"wuertex" Maschinenbau Hofmann & Co GmbH
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Application filed by "wuertex" Maschinenbau Hofmann & Co GmbH filed Critical "wuertex" Maschinenbau Hofmann & Co GmbH
Publication of EP0295441A2 publication Critical patent/EP0295441A2/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
    • B28B1/526—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement by delivering the materials on a conveyor of the endless-belt type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/10—Moulding of mats
    • B27N3/14—Distributing or orienting the particles or fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B5/00—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping
    • B28B5/02—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type
    • B28B5/026—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type the shaped articles being of indefinite length
    • B28B5/027—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type the shaped articles being of indefinite length the moulding surfaces being of the indefinite length type, e.g. belts, and being continuously fed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/24—Moulding or pressing characterised by using continuously acting presses having endless belts or chains moved within the compression zone

Definitions

  • the invention relates to a method for the continuous production of moldings, in particular sheets according to the preamble of claim 1 and a device for carrying out this method according to the preamble of claim 4.
  • the mixture of binder (gypsum) and fibrous material is sprinkled on the forming belt in layers with the addition of water.
  • the layers scattered on top of one another are continuously fed to a belt press, in which the layers lying on the forming belt are continuously compressed for curing.
  • the invention has for its object to provide a method and an apparatus, whereby the contamination of the ribbon in the edge areas is reduced to a minimum and thus the edge areas are easy and gentle to clean.
  • the masking tape prevents soiling of the critical edge zones of the forming tape by firmly adhering and building up material.
  • the forming tape therefore only needs a weak cleaning, so that its wear can be kept low.
  • the washing device cleaning the forming tape can be designed with a lower performance, since the heavily soiled edges of the forming tape no longer occur.
  • the masking tape is lifted from the molding tape 1 after the molding has been compressed, then cleaned and put back on the molding tape in front of the spreading zone, the masking tape is used as a continuous endless belt that can be made of a material that is insensitive to several washing processes - preferably plastic .
  • the upper run of the cover strip ends behind the cutting device, the inner edge of the cover strip lying laterally on the outside next to the trimming edge of the molded body.
  • the trimming waste is carried along by means of the masking tape and is preferably thrown into a collecting container.
  • the device according to the invention is intended in particular for producing gypsum fiber boards from a moistened mixture of gypsum and fibrous materials.
  • the spreading head 8 which has three individual spreading heads 8a, 8b, 8c for each spreading of a partial layer, the molded body to be formed (here a plate) is sprinkled onto the forming belt 1 in three partial layers with the addition of water via the supply line 9.
  • the production of the shaped body is described in detail in DE-OS 34 39 493, to which reference is made.
  • the forming belt 1 is an endless belt made of plastic with a sensitive special surface.
  • the upper run 1a of the forming belt begins in the running direction 16 in front of the spreading head 8 and ends after the pressing device 5 in front of a saw 10.
  • the forming belt 1 runs in the running direction 16 at a constant speed; the returning run 1d of the forming tape is guided after the pressing device 5 by a cleaning device for washing off material residues on the forming tape surface.
  • the molded body continuously sprinkled on the forming belt 1 is continuously compressed on the upper run 1a in the pressing device 5 to form a plate, for which purpose the pressing device 5 has an upper and a lower rotating pressing belt 5a, 5b made of steel.
  • the lower press belt 5b does not come into contact with the shaped body itself but lies against the upper run 1a of the shaped belt 1.
  • a plastic cover band 4 is arranged between the upper press belt 5a and the molded body to be compressed so that the upper press belt 5a made of steel cannot come into direct contact with the molded body.
  • the shroud 4 is provided as a circumferential belt which corresponds in speed and direction to that of the upper press belt 5a.
  • the returning dream of the Cover tape 4 is passed through a washing device 15.
  • the press belts 5a, 5b are each designed somewhat wider than the forming belt 1 or the cover belt 4.
  • the compressed molding is taken over by a rotating plate conveyor belt 6, the width of which is smaller than that of the forming belt 1 (cf. FIG. 2).
  • the compacted molded body therefore projects beyond the edges of the plate conveyor belt 6 and is trimmed to the desired end width by a cutting device 10 on both sides of the conveyor belt 6.
  • the width of the conveyor belt 6 preferably corresponds exactly to the inner distance of the cutting blades of the cutting device 10 located on both sides of the belt.
  • a collecting container 11 is arranged below the cutting device 10 for collecting the cutting waste for further use.
  • a masking tape 2 is provided above the molding tape 1, which covers the lateral edges 20 of the molding tape 1 on which the molding body edges rest.
  • the cover strip 2 running as an endless belt is preferably made of a robust, insensitive material and lies loosely on the forming belt. It is carried along in the running direction 16 of the forming belt at its speed, so that a relative displacement occurs between the forming belt 1 and the covering belt 2.
  • This is advantageous Masking tape over the edges of the upper run 1a of the forming tape 1 laterally. It is preferably placed loosely overlapping on the upper run 1a in front of the spreading head and, after passing through the pressing device 5, lifted off the forming belt 1 again. This takes place after the end of the upper run 1a of the forming belt 1, ie the upper run 2a of the cover belt 2 extends beyond the end of the forming belt 1.
  • the upper run 2a of the forming strip expediently ends after the cutting device 10 above the collecting container 11.
  • the inner edge 21 of the cover strip 2 is spaced from the trimming edge 22 of the cutting device 10 in such a way that the cutting blades can work without problems within the distance.
  • the returning run 2b of the masking tape is guided - preferably outside the collecting container 11 - through a washing device 13, in which the impurities still on the masking tape are washed off.
  • the masking tape 2 is already guided in its support plane before the start of the upper run 1a of the molding tape 1; This is achieved in that the deflecting roller 3 is arranged at the beginning of the upper run 2a of the cover band at the level of the deflecting roller 18 located at the start of the upper run 1a of the forming band 1.
  • the axes of the pulleys 3 and 18 preferably at exactly the same height.
  • the masking tape can be advantageous not to design the masking tape as a continuous endless tape but as a disposable tape that is used only once.
  • the disposable tape is unwound from a supply roll, fed in front of the spray head 8 in the manner described and could then e.g. with the adhering material after leaving the pressing device and the trimming cut are thrown into the collecting container 11.
  • the washing device 13 can then be omitted.
  • a lateral protective band 7 is arranged, the plane of which is perpendicular to the plane of the forming belt 1.
  • Such a protective tape 7 is advantageous both in connection with the masking tape described above and independently as the only measure for avoiding contamination of the edge zones of the molding tape 1.
  • the protective band 7 is preferably a circumferential band, the deflection rollers 12 of which are fastened to the housing of the spreading head 8; the lower edge of the protective tape lies just above the molding tape 1 or the inner edge 22 of the covering tape 2 resting on the molding tape 1.
  • the inner run 7a of the protective tape runs in the running direction 16 of the molding tape at its speed. In order to avoid slippage between the forming tape and the protective tape, a positive gear or chain drive is advisable.
  • the length of the protective tape 7 extends over the entire length of the spreading head 8; a protrusion at the ends of the spreading head 8 is advantageous.
  • the height of the protective tape corresponds at least to the height of the molded body to be scattered, but preferably the height of the protective tape 7 is several times larger.
  • rollers 12 of each protective belt 7 - preferably the rollers 12 on one side together - can be folded outward about a pivot axis 19 lying in the running direction 16 of the forming belt 1, so that the spreading head 8 is freely accessible for maintenance work.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

2.1 In known processes and apparatus, the article to be moulded is compressed while resting on a moulding belt, in the course of which the moulding belt accumulates considerable dirt in the lateral edge zones and can only be cleaned again with considerable effort. …<??>2.2 According to the invention, the edge zones of the moulding belt (1) are covered by a cover belt (2) running with it before the article to be moulded is spread on, as a result of which the considerable dirt accumulation of the moulding belt is avoided. …<??>2.3 The invention can be used in the continuous manufacture both of plaster fibreboards and of fibreboards, chipboards or the like. …<IMAGE>…

Description

Die Erfindung betrifft ein Verfahren zur kontinuierlichen Herstellung von Formkörpern, insbesondere Platten nach dem Oberbegriff des Anspruches 1 sowie eine Vorrichtung zur Durchführung dieses Verfahrens nach dem Oberbegriff des Anspruches 4.The invention relates to a method for the continuous production of moldings, in particular sheets according to the preamble of claim 1 and a device for carrying out this method according to the preamble of claim 4.

Bei dem aus der DE-OS 34 39 493 bekannten Verfahren wird die Mischung aus Bindemittel (Gips) und Faserstoff unter Zusatz von Wasser schichtweise auf das Formband aufgestreut. Die aufeinander aufgestreuten Schichten werden kontinuierlich einer Bandpresse zugeführt, in der die auf dem Formband liegenden Schichten zur Aushärtung fortlaufend verdichtet werden.In the process known from DE-OS 34 39 493, the mixture of binder (gypsum) and fibrous material is sprinkled on the forming belt in layers with the addition of water. The layers scattered on top of one another are continuously fed to a belt press, in which the layers lying on the forming belt are continuously compressed for curing.

In der Praxis hat sich gezeigt, daß gerade die Randbereiche der verdichteten Platten nach Durchlaufen der Bandpresse, insbesondere an dem sie tragenden Formband anhaften und beim Abheben der Platten vom Formband erhebliche Materialreste in den Randzonen des Formbandes verbleiben. Dies ist vermutlich darauf zurückzuführen, daß aufgrund des unvermeidlichen Preßdruckabfalls in den Randbereichen der Platten die Adhäsion am Formband größer ist als die Kohäsion (innerer Zusammenhalt) der verpreßten Formkörpermasse in den Randbereichen. Diese störende Erscheinung ist nicht nur bei der Fertigung von Gipsfaserplatten, sondern auch - allerdings in abgeschwächter Form - bei der Fertigung von Faserplatten, Spanplatten usw. zu beobachten.In practice, it has been shown that the edge areas of the compressed plates adhere to the forming belt carrying them after passing through the belt press, and that considerable material residues remain in the edge zones of the forming belt when the plates are lifted off the forming belt. This is probably due to the fact that, due to the inevitable drop in pressure in the edge areas of the plates, the adhesion to the forming belt is greater than the cohesion (internal cohesion) pressed molding compound in the edge areas. This disturbing phenomenon can be observed not only in the production of gypsum fibreboard, but also - albeit in a weakened form - in the manufacture of fiberboard, chipboard, etc.

Die Reinigung des verschmutzten Formbandes mit mechanischen und/oder chemischen Mitteln ist aufwendig und teuer und dennoch nicht zufriedenstellend. Durch die Reinigung auftretende Beschädigungen des empfindlichen Formbandes können nicht ausgeschlossen werden; insbesondere bei einer Hochdruckreinigung des stark verschmutzten Randbereichs tritt ein erhöhter Verschleiß des Formbandes auf.The cleaning of the soiled molding tape with mechanical and / or chemical means is complex and expensive and yet unsatisfactory. Damage to the sensitive forming belt caused by cleaning cannot be excluded; Particularly when the heavily soiled edge area is cleaned with high pressure, there is increased wear of the forming belt.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren sowie eine Vorrichtung anzugeben, wodurch die Verschmutzung des Formbandes in den Randbereichen auf ein Minimum reduziert wird und somit die Randbereiche leicht und schonend zu reinigen sind.The invention has for its object to provide a method and an apparatus, whereby the contamination of the ribbon in the edge areas is reduced to a minimum and thus the edge areas are easy and gentle to clean.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches 1 gelöst. Eine vorteilhafte Vorrichtung zur Durchführung des Verfahrens ist im Anspruch 4 angegeben.This object is achieved by the characterizing features of claim 1. An advantageous device for performing the method is specified in claim 4.

Durch das Abdeckband wird eine Verschmutzung der kritischen Randzonen des Formbandes durch festhaftendes und sich aufbauendes Material vermieden. Das Formband bedarf daher nur einer schwachen Reinigung, so daß dessen Verschleiß geringgehalten werden kann. Die das Formband säubernde Waschvorrichtung kann in der Leistung geringer ausgelegt sein, da die stark verschmutzten Formbandränder nicht mehr auftreten.The masking tape prevents soiling of the critical edge zones of the forming tape by firmly adhering and building up material. The forming tape therefore only needs a weak cleaning, so that its wear can be kept low. The washing device cleaning the forming tape can be designed with a lower performance, since the heavily soiled edges of the forming tape no longer occur.

Läuft das Abdeckband mit der Geschwindigkeit des umlaufenden Formbandes in dessen Laufrichtung mit, so werden Relativverschiebungen zwischen dem Abdeckband und dem Formband vermieden, die zu Gefügestörungen in den Randzonen des Formkörpers führen könnten.If the masking tape runs at the speed of the rotating molding tape in its running direction, relative displacements between the masking tape and the molding tape, which could lead to structural defects in the edge zones of the molded body, are avoided.

Wird das Abdeckband nach der Verdichtung des Formkörpers von dem Formband 1 abgehoben, anschließend gereinigt und vor der Streuzone wieder auf das Formband aufgelegt, so erfolgt eine Benutzung des Abdeckbandes als umlaufendes Endlosband, das aus einem gegen mehrere Waschvorgänge unempfindlichen Material - vorzugsweise Kunststoff - bestehen kann.If the masking tape is lifted from the molding tape 1 after the molding has been compressed, then cleaned and put back on the molding tape in front of the spreading zone, the masking tape is used as a continuous endless belt that can be made of a material that is insensitive to several washing processes - preferably plastic .

In vorteilhafter Weiterbildung der Vorrichtung endet das obere Trumm des Abdeckbandes hinter der Schneidvorrichtung, wobei die innere Kante des Abdeckbandes seitlich außen neben der Besäumkante des Formkörpers liegt. Auf diese Weise wird der Besäumabfall mittels des Abdeckbandes mitgeführt und vorzugsweise in einen Sammelbehälter abgeworfen.In an advantageous further development of the device, the upper run of the cover strip ends behind the cutting device, the inner edge of the cover strip lying laterally on the outside next to the trimming edge of the molded body. In this way, the trimming waste is carried along by means of the masking tape and is preferably thrown into a collecting container.

Weitere Merkmal der Erfindung ergeben sich aus den weiteren Ansprüchen, der Beschreibung und der Zeichnung, die ein nachfolgend beschriebenes Ausführungsbeispiel der Erfindung darstellt. Es zeigen:

  • Fig. 1 eine schematische Seitenansicht der erfindungsgemäßen Vorrichtung,
  • Fig. 2 eine Draufsicht auf die Vorrichtung nach Fig. 1,
  • Fig. 3 einen schematischen Schnitt durch die Vorrichtung in Höhe des Streukopfes.
Further features of the invention result from the further claims, the description and the drawing, which represents an embodiment of the invention described below. Show it:
  • 1 is a schematic side view of the device according to the invention,
  • 2 is a plan view of the device of FIG. 1,
  • Fig. 3 shows a schematic section through the device at the level of the spreading head.

Die erfindungsgemäße Vorrichtung ist insbesondere zum Fertigen von Gipsfaserplatten aus einer angefeuchteten Mischung von Gips und Faserstoffen vorgesehen. Mittels des Streukopfes 8, der drei Einzelstreuköpfe 8a, 8b, 8c zum Aufstreuen je einer Teilschicht aufweist, wird unter Zusatz von Wasser über die Versorgungsleitung 9 der zu bildende Formkörper (hier eine Platte) in drei Teilschichten auf das Formband 1 aufgestreut. Die Herstellung des Formkörpers ist ausführlich in der DE-OS 34 39 493 beschrieben, auf die Bezug genommen wird. Das Formband 1 ist im Ausführungsbeispiel ein endloses Band aus Kunststoff mit einer empfindlichen Spezialoberfläche. Das obere Trumm 1a des Formbandes beginnt in Laufrichtung 16 vor dem Streukopf 8 und endet nach der Preßvorrichtung 5 vor einer Säge 10. Das Formband 1 läuft in Laufrichtung 16 mit konstanter Geschwindigkeit um; das rücklaufende Trumm 1d des Formbandes ist nach der Preßvorrichtung 5 durch eine Reinigungsvorrichtung zum Abwaschen von Materialresten auf der Formbandoberfläche geführt.The device according to the invention is intended in particular for producing gypsum fiber boards from a moistened mixture of gypsum and fibrous materials. By means of the spreading head 8, which has three individual spreading heads 8a, 8b, 8c for each spreading of a partial layer, the molded body to be formed (here a plate) is sprinkled onto the forming belt 1 in three partial layers with the addition of water via the supply line 9. The production of the shaped body is described in detail in DE-OS 34 39 493, to which reference is made. In the exemplary embodiment, the forming belt 1 is an endless belt made of plastic with a sensitive special surface. The upper run 1a of the forming belt begins in the running direction 16 in front of the spreading head 8 and ends after the pressing device 5 in front of a saw 10. The forming belt 1 runs in the running direction 16 at a constant speed; the returning run 1d of the forming tape is guided after the pressing device 5 by a cleaning device for washing off material residues on the forming tape surface.

Der auf das Formband 1 fortlaufend aufgestreute Formkörper wird auf dem oberen Trumm 1a aufliegend fortlaufend in der Preßvorrichtung 5 zu einer Platte verdichtet, wozu die Preßvorrichtung 5 je ein oberes und ein unteres, umlaufendes Preßband 5a, 5b aus Stahl aufweist. Das untere Preßband 5b kommt mit dem Formkörper selbst nicht in Kontakt sondern liegt an dem oberen Trumm 1a des Formbandes 1 an. Zwischen dem oberen Preßband 5a und dem zu verdichtenden Formkörper ist ein aus Kunststoff bestehendes Deckband 4 angeordnet, so daß auch das obere Preßband 5a aus Stahl nicht im direkten Kontakt mit dem Formkörper treten kann. Das Deckband 4 ist als umlaufendes Band vorgesehen, das in Geschwindigkeit und Laufrichtung dem des oberen Preßbandes 5a entspricht. Das rücklaufende Trumm des Deckbandes 4 ist durch eine Waschvorrichtung 15 geführt.The molded body continuously sprinkled on the forming belt 1 is continuously compressed on the upper run 1a in the pressing device 5 to form a plate, for which purpose the pressing device 5 has an upper and a lower rotating pressing belt 5a, 5b made of steel. The lower press belt 5b does not come into contact with the shaped body itself but lies against the upper run 1a of the shaped belt 1. Between the upper press belt 5a and the molded body to be compressed, a plastic cover band 4 is arranged so that the upper press belt 5a made of steel cannot come into direct contact with the molded body. The shroud 4 is provided as a circumferential belt which corresponds in speed and direction to that of the upper press belt 5a. The returning dream of the Cover tape 4 is passed through a washing device 15.

Die Preßbänder 5a, 5b sind - wie aus Fig. 2 ersichtlich - jeweils etwas breiter als das Formband 1 bzw. das Deckband 4 ausgebildet.As can be seen from FIG. 2, the press belts 5a, 5b are each designed somewhat wider than the forming belt 1 or the cover belt 4.

Am Ende des Formbandes 1, dessen Breite zumindest geringfügig breiter als der aufgestreute bzw. verdichtete Formkörper ist, wird der verdichtete Formkörper von einem umlaufenden Plattentransportband 6 übernommen, dessen Breite geringer als die des Formbandes 1 ist (vgl. Fig. 2). Der verdichtete Formkörper steht daher über die Ränder des Plattentransportbandes 6 über und wird von einer Schneidvorrichtung 10 auf beiden Seiten des Transportbandes 6 auf die gewünschte Endbreite besäumt. Die Breite des Transportbandes 6 entspricht vorzugsweise genau dem inneren Abstand der beidseitig des Bandes liegenden Schneidblätter der Schneidvorrichtung 10.At the end of the forming belt 1, the width of which is at least slightly wider than the scattered or compressed molding, the compressed molding is taken over by a rotating plate conveyor belt 6, the width of which is smaller than that of the forming belt 1 (cf. FIG. 2). The compacted molded body therefore projects beyond the edges of the plate conveyor belt 6 and is trimmed to the desired end width by a cutting device 10 on both sides of the conveyor belt 6. The width of the conveyor belt 6 preferably corresponds exactly to the inner distance of the cutting blades of the cutting device 10 located on both sides of the belt.

Unterhalb der Schneidvorrichtung 10 ist ein Sammelbehälter 11 zum Auffangen des Schneidabfalls zur Weiterverwendung angeordnet.A collecting container 11 is arranged below the cutting device 10 for collecting the cutting waste for further use.

Gemäß der Erfindung ist - in Draufsicht auf die Vorrichtung gemäß Fig. 2 - oberhalb des Formbandes 1 ein Abdeckband 2 vorgesehen, das die seitlichen Ränder 20 des Formbandes 1, auf denen die Formkörperränder aufliegen, abdeckt. Das als Endlosband umlaufende Abdeckband 2 ist vorzugsweise aus einem robusten, unempfindlichen Material gefertigt und liegt lose auf dem Formband auf. Es wird in Laufrichtung 16 des Formbandes mit dessen Geschwindigkeit mitgeführt, so daß zwischen Formband 1 und Abdeckband 2 eine Relativverschiebung auftritt. Vorteilhaft steht das Abdeckband über die Ränder des oberen Trumms 1a des Formbandes 1 seitlich über. Es wird vorzugsweise vor dem Streukopf überlappend auf den oberen Trumm 1a lose aufgelegt und nach Durchlaufen der Preßvorrichtung 5 vom Formband 1 wieder abgehoben. Dies erfolgt nach dem Ende des oberen Trumms 1a des Formbandes 1, d.h., das obere Trumm 2a des Abdeckbandes 2 läuft über das Ende des Formbandes 1 hinaus.According to the invention - in plan view of the device according to FIG. 2 - a masking tape 2 is provided above the molding tape 1, which covers the lateral edges 20 of the molding tape 1 on which the molding body edges rest. The cover strip 2 running as an endless belt is preferably made of a robust, insensitive material and lies loosely on the forming belt. It is carried along in the running direction 16 of the forming belt at its speed, so that a relative displacement occurs between the forming belt 1 and the covering belt 2. This is advantageous Masking tape over the edges of the upper run 1a of the forming tape 1 laterally. It is preferably placed loosely overlapping on the upper run 1a in front of the spreading head and, after passing through the pressing device 5, lifted off the forming belt 1 again. This takes place after the end of the upper run 1a of the forming belt 1, ie the upper run 2a of the cover belt 2 extends beyond the end of the forming belt 1.

Zweckmäßig endet das obere Trumm 2a des Formbandes nach der Schneidvorrichtung 10 oberhalb des Sammelbehälters 11. Dabei weist die innere Kante 21 des Abdeckbandes 2 einen derartigen Abstand von der Besäumkante 22 der Schneidvorrichtung 10 auf, daß die Schneidblätter innerhalb des Abstandes störungsfrei arbeiten können. Durch diese Anordnung wird der beim Besäumschnitt abgetrennte Abfall auf dem Abdeckband bis hinter die Schneidvorrichtung geführt und - gegebenenfalls unter Zuhilfenahme von mechanischen Mitteln - am Ende des oberen Trumms 2a in den Sammelbehälter 11 abgeworfen.The upper run 2a of the forming strip expediently ends after the cutting device 10 above the collecting container 11. The inner edge 21 of the cover strip 2 is spaced from the trimming edge 22 of the cutting device 10 in such a way that the cutting blades can work without problems within the distance. With this arrangement, the waste separated during the trimming cut is guided on the masking tape as far as behind the cutting device and - if necessary with the aid of mechanical means - is thrown into the collecting container 11 at the end of the upper run 2a.

Das rücklaufende Trumm 2b des Abdeckbandes wird - vorzugsweise außerhalb des Sammelbehälters 11 - durch eine Waschvorrichtung 13 geführt, in der die noch auf dem Abdeckband befindlichen Verunreinigungen abgewaschen werden.The returning run 2b of the masking tape is guided - preferably outside the collecting container 11 - through a washing device 13, in which the impurities still on the masking tape are washed off.

Wie aus den Darstellungen nach den Fig. 1 und 2 entnehmbar, ist das Abdeckband 2 vor dem Beginn des oberen Trumms 1a des Formbandes 1 bereits in seiner Auflageebene geführt; dies wird dadurch erreicht, daß die Umlenkrolle 3 am Anfang des oberen Trumms 2a des Abdeckbandes auf der Höhe der am Anfang des oberen Trumms 1a des Formbandes 1 liegenden Umlenkrolle 18 angeordnet ist. Bei gleichem Rollendurchmesser liegen die Achsen der Umlenkrollen 3 und 18 vorzugsweise auf genau der gleichen Höhe.As can be seen from the illustrations according to FIGS. 1 and 2, the masking tape 2 is already guided in its support plane before the start of the upper run 1a of the molding tape 1; This is achieved in that the deflecting roller 3 is arranged at the beginning of the upper run 2a of the cover band at the level of the deflecting roller 18 located at the start of the upper run 1a of the forming band 1. Are at the same roll diameter the axes of the pulleys 3 and 18 preferably at exactly the same height.

Es kann vorteilhaft sein, das Abdeckband nicht als umlaufendes Endlosband sondern als nur einmal genutztes Wegwerfband auszubilden. In diesem Fall wird das Wegwerfband von einer Versorgungsrolle abgerollt, vor dem Sprühkopf 8 in der beschriebenen Weise zugeführt und könnte dann z.B. mit dem anhaftenden Material nach Verlassen der Preßvorrichtung und dem Besäumschnitt in den Sammelbehälter 11 abgeworfen werden. Die Waschvorrichtung 13 kann dann entfallen.It can be advantageous not to design the masking tape as a continuous endless tape but as a disposable tape that is used only once. In this case the disposable tape is unwound from a supply roll, fed in front of the spray head 8 in the manner described and could then e.g. with the adhering material after leaving the pressing device and the trimming cut are thrown into the collecting container 11. The washing device 13 can then be omitted.

Zur Vermeidung von Verschmutzungen der Randbereiche des oberen Trumms 1a des Formbandes 1 im Bereich des Streukopfes 8 (Streuzone) ist ein seitliches Schutzband 7 angeordnet, dessen Ebene senkrecht auf der Ebene des Formbandes 1 steht. Ein derartiges Schutzband 7 ist sowohl in Verbindung mit dem vorstehend beschriebenen Abdeckband als auch selbständig als einzige Maßnahme zur Vermeidung von Verschmutzungen der Randzonen des Formbandes 1 vorteilhaft.To avoid contamination of the edge regions of the upper run 1a of the forming belt 1 in the region of the spreading head 8 (spreading zone), a lateral protective band 7 is arranged, the plane of which is perpendicular to the plane of the forming belt 1. Such a protective tape 7 is advantageous both in connection with the masking tape described above and independently as the only measure for avoiding contamination of the edge zones of the molding tape 1.

Das Schutzband 7 ist vorzugsweise ein umlaufendes Band, dessen Umlenkrollen 12 am Gehäuse des Streukopfes 8 befestigt sind; der untere Rand des Schutzbandes liegt dabei knapp oberhalb des Formbandes 1 bzw. der inneren Kante 22 des auf dem Formband 1 aufliegenden Abdeckbandes 2. Das innere Trumm 7a des Schutzbandes läuft in Laufrichtung 16 des Formbandes mit dessen Geschwindigkeit mit. Um einen Schlupf zwischen dem Formband und dem Schutzband zu vermeiden, ist ein formschlüssiger Zahnrad- oder Kettenantrieb zweckmäßig.The protective band 7 is preferably a circumferential band, the deflection rollers 12 of which are fastened to the housing of the spreading head 8; the lower edge of the protective tape lies just above the molding tape 1 or the inner edge 22 of the covering tape 2 resting on the molding tape 1. The inner run 7a of the protective tape runs in the running direction 16 of the molding tape at its speed. In order to avoid slippage between the forming tape and the protective tape, a positive gear or chain drive is advisable.

Die Länge des Schutzbandes 7 erstreckt sich über die gesamte Länge des Streukopfes 8; ein Überstand an den Enden des Streukopfes 8 ist vorteilhaft. Die Höhe des Schutzbandes entspricht mindestens der Höhe des zu streuenden Formkörpers, vorzugsweise ist die Höhe des Schutzbandes 7 jedoch ein Mehrfaches größer.The length of the protective tape 7 extends over the entire length of the spreading head 8; a protrusion at the ends of the spreading head 8 is advantageous. The height of the protective tape corresponds at least to the height of the molded body to be scattered, but preferably the height of the protective tape 7 is several times larger.

Die Laufrollen 12 jedes Schutzbandes 7 sind - vorzugsweise die Laufrollen 12 einer Seite gemeinsamen - um eine in Laufrichtung 16 des Formbandes 1 liegende Schwenkachse 19 nach außen wegklappbar, so daß der Streukopf 8 für Wartungsarbeiten frei zugänglich ist.The rollers 12 of each protective belt 7 - preferably the rollers 12 on one side together - can be folded outward about a pivot axis 19 lying in the running direction 16 of the forming belt 1, so that the spreading head 8 is freely accessible for maintenance work.

Es hat sich als zweckmäßig erwiesen, die inneren Kanten 22 des Abdeckbandes 2 vorzugsweise 30 bis 50 mm von der durch das Schutzband 7 bestimmten Begrenzung des Streubereichs weiter außen liegend anzuordnen.It has proven to be expedient to arrange the inner edges 22 of the masking tape 2, preferably 30 to 50 mm from the boundary of the scattering area determined by the protective tape 7, further out.

Claims (14)

1. Verfahren zur kontinuierlichen Herstellung von Formkörpern, insbesondere Platten, aus einer Mischung aus Bindemittel und Faserstoff, die auf ein Formband (1) aufgestreut und nachfolgend auf dem Formband (1) aufliegend zu einem Formkörper verdichtet wird,
dadurch gekennzeichnet, daß die seitlichen Ränder (20) des Formbandes (1), die die Ränder des zu bildenden Formkörpers tragen, vor dem Aufstreuen der Mischung mit einem lose aufliegenden Abdeckband (2) abgedeckt werden.1. A process for the continuous production of moldings, in particular sheets, from a mixture of binder and fibrous material which is sprinkled onto a molding tape (1) and subsequently compressed to form a molding lying on the molding tape (1),
characterized in that the lateral edges (20) of the molding tape (1), which carry the edges of the molded body to be formed, are covered with a loosely placed cover tape (2) before the mixture is sprinkled on. 2. Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß das Abdeckband (2) mit der Geschwindigkeit des umlaufenden Formbandes (1) in dessen Laufrichtung (16) mitläuft.2. The method according to claim 1,
characterized in that the cover band (2) runs at the speed of the revolving forming band (1) in its running direction (16). 3. Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß das Abdeckband (2) nach der Verdichtung des Formkörpers von dem Formband (1) abgehoben, anschließend gereinigt und vor der Streuzone wieder auf das Formband (1) aufgelegt wird.3. The method according to claim 1 or 2,
characterized in that the cover band (2) is lifted from the form band (1) after the compression of the shaped body, then cleaned and placed back on the form band (1) in front of the spreading zone. 4. Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 3, mit mindestens einem über dem Formband (1) angeordneten Streukopf (8) zum Aufstreuen der Mischung in mindestens einer Schicht auf das Formband (1), und mit einer die auf dem Formband (1) aufliegende Schicht zu dem Formkörper verdichtende Preßvorrichtung (5),
dadurch gekennzeichnet, daß oberhalb des Formbandes (1) und zu diesem etwa parallel liegend ein Abdeckband (2) angeordnet ist - welches in Draufsicht - die die Formkörperränder tragenden seitlichen Ränder (20) des Formbandes (1) überlappt, lose auf dem Formband (1) aufliegt, und sich mindestens von unterhalb des Streukopfes (8) bis hinter die Preßvorrichtung (5) erstreckt.4. Device for carrying out the method according to one of claims 1 to 3, with at least one above the forming belt (1) arranged spreading head (8) for sprinkling the mixture in at least one layer on the forming belt (1), and with one on the Forming tape (1) layer lying on the molding compacting device (5),
characterized in that a covering band (2) is arranged above the forming band (1) and lying approximately parallel to it - which, in plan view - overlaps the lateral edges (20) of the forming band (1) carrying the shaped body edges, loosely on the forming band (1 ) rests, and extends at least from below the spreading head (8) to behind the pressing device (5). 5. Vorrichtung nach Anspruch 4,
dadurch gekennzeichnet, daß das Abdeckband (2) als Endlosband ausgebildet ist.5. The device according to claim 4,
characterized in that the cover band (2) is designed as an endless band. 6. Vorrichtung nach Anspruch 4 oder 5,
dadurch gekennzeichnet, daß das Abdeckband (2) über den Rand (20) des Formbandes (1) seitlich übersteht.6. The device according to claim 4 or 5,
characterized in that the cover band (2) projects laterally beyond the edge (20) of the forming band (1). 7. Vorrichtung nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet, daß das Abdeckband (2) über das Ende des umlaufenden Formbandes (1) hinausgeführt ist.7. Device according to one of claims 4 to 6,
characterized in that the cover band (2) extends beyond the end of the rotating forming band (1). 8. Vorrichtung nach Anspruch 7, mit einer der Preßvorrichtung (5) nachgeordneten Schneidvorrichtung (10) zum Besäumen des verdichteten Formkörpers, dadurch gekennzeichnet, daß die innere Kante (22) des Abdeckbandes (2) seitlich außen neben der Besäumkante (21) des Formkörpers liegt und das Abdeckband (2) hinter der Schneidvorrichtung (10) endet.8. The device according to claim 7, with one of the pressing device (5) downstream cutting device (10) for trimming the compacted shaped body, characterized in that the inner edge (22) of the cover strip (2) laterally outside next to the trimmed edge (21) of the shaped body lies and the masking tape (2) ends behind the cutting device (10). 9. Vorrichtung nach einem der Ansprüche 4 bis 8,
dadurch gekennzeichnet, daß das obere Trumm (2a) des Abdeckbandes (2) oberhalb eines Sammelbehälters (11) endet.9. Device according to one of claims 4 to 8,
characterized in that the upper run (2a) of the masking tape (2) ends above a collecting container (11). 10. Vorrichtung nach einem der Ansprüche 4 bis 9,
dadurch gekennzeichnet, daß das rücklaufende Trumm (2b) des Abdeckbandes (2) eine Waschvorrichtung (13) durchläuft.10. The device according to one of claims 4 to 9,
characterized in that the returning run (2b) of the masking tape (2) passes through a washing device (13). 11. Vorrichtung zur kontinuierlichen Fertigung von Formkörpern, insbesondere Platten, aus einer Mischung aus Bindemittel und Faserstoffen, mit einem oberhalb eines Formbandes (1) angeordneten Streukopf (8) zum Aufstreuen des zu verdichtenden Formkörpers, insbesondere nach den Ansprüchen 4 bis 10,
dadurch gekennzeichnet, daß zur seitlichen Begrenzung des Streubereichs mindestens über die Länge des Streukopfes (8) sich erstreckende, senkrecht zum Formband (1) stehende Schutzbänder (7) angeordnet sind, die in Laufrichtung (16) des Formbandes (1) mitlaufen, wobei die Laufrollen (12) der Schutzbänder (7) am Gehäuse des Streukopfes (8) hochklappbar befestigt sind.11. Device for the continuous production of moldings, in particular plates, from a mixture of binder and fibrous materials, with a spreading head (8) arranged above a molding belt (1) for sprinkling the molded body to be compressed, in particular according to claims 4 to 10,
characterized in that for the lateral limitation of the spreading area at least over the length of the spreading head (8) extending perpendicular to the forming tape (1) are arranged protective tapes (7) which run in the running direction (16) of the forming tape (1), the Rollers (12) of the protective bands (7) are fastened to the housing of the spreading head (8) so that they can be folded up. 12. Vorrichtung nach Anspruch 11,
dadurch gekennzeichnet, daß die Laufrollen (12) der Schutzbänder (7) um eine in Laufrichtung (16) des Formbandes (1) sich erstreckende Schwenkachse (19) klappbar sind.12. The device according to claim 11,
characterized in that the rollers (12) of the protective bands (7) can be folded about a pivot axis (19) extending in the running direction (16) of the forming band (1). 13. Vorrichtung nach Anspruch 11 oder 12,
dadurch gekennzeichnet, daß die Laufrollen (12) einer Seite als zusammenhängende Einheit klappbar sind.13. The apparatus of claim 11 or 12,
characterized in that the rollers (12) on one side can be folded as a coherent unit. 14. Vorrichtung nach einem der Ansprüche 11 bis 13,
dadurch gekennzeichnet, daß das Schutzband (7) oberhalb des Abdeckbandes (2) liegt und das innere Trumm des Schutzbandes (7) geringfügig weiter innen liegt als die innere Kante (22) des Abdeckbandes (2).14. Device according to one of claims 11 to 13,
characterized in that the protective tape (7) lies above the cover tape (2) and the inner run of the protective tape (7) lies slightly further inside than the inner edge (22) of the cover tape (2).
EP88107896A 1987-06-06 1988-05-18 Process for continuously making moulded articles, in particular panels, and apparatus for performing the process Withdrawn EP0295441A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3719128 1987-06-06
DE19873719128 DE3719128A1 (en) 1987-06-06 1987-06-06 METHOD FOR THE CONTINUOUS PRODUCTION OF MOLDED BODIES, IN PARTICULAR PLATES AND DEVICE FOR IMPLEMENTING THE METHOD

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EP0295441A2 true EP0295441A2 (en) 1988-12-21

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EP (1) EP0295441A2 (en)
DE (1) DE3719128A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399308B (en) * 1993-04-29 1995-04-25 Eternit Werke Hatschek L METHOD AND PLANTS FOR PRODUCING PRODUCTS CONTAINING FIBERS AND HYDRAULIC BINDING AGENTS
EP0463454B1 (en) * 1990-06-14 2001-09-26 Dermamed Transdermal administration to humans and animals

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5971739A (en) 1996-12-31 1999-10-26 Hoffman; Earl Roger Gum processing and packaging system
CN102267159B (en) * 2011-07-25 2013-12-25 四川省新岷江人造板机器有限责任公司 Artificial board preforming press

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2308479A1 (en) * 1975-04-21 1976-11-19 Babu Jean Pierre Continuous prodn. of plaster planks - uses horizontal mould with moving walls formed by separate endless belts driven at same speed
DE2722356C2 (en) * 1977-05-17 1982-07-29 Bison-Werke Bähre & Greten GmbH & Co KG, 3257 Springe Method and device for the continuous production of chipboard, fiber or the like. plates

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0463454B1 (en) * 1990-06-14 2001-09-26 Dermamed Transdermal administration to humans and animals
AT399308B (en) * 1993-04-29 1995-04-25 Eternit Werke Hatschek L METHOD AND PLANTS FOR PRODUCING PRODUCTS CONTAINING FIBERS AND HYDRAULIC BINDING AGENTS

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US4917839A (en) 1990-04-17

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