EP0077838B1 - Protective cover for a chip glueing machine - Google Patents

Protective cover for a chip glueing machine Download PDF

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Publication number
EP0077838B1
EP0077838B1 EP81107673A EP81107673A EP0077838B1 EP 0077838 B1 EP0077838 B1 EP 0077838B1 EP 81107673 A EP81107673 A EP 81107673A EP 81107673 A EP81107673 A EP 81107673A EP 0077838 B1 EP0077838 B1 EP 0077838B1
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EP
European Patent Office
Prior art keywords
drum
cover
protective arrangement
arrangement according
chips
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
EP81107673A
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German (de)
French (fr)
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EP0077838A1 (en
Inventor
Wolfgang Ing. Grad. Bürkner
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.)
Carl Schenck AG
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Carl Schenck AG
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Publication date
Application filed by Carl Schenck AG filed Critical Carl Schenck AG
Priority to DE8181107673T priority Critical patent/DE3165569D1/en
Priority to EP81107673A priority patent/EP0077838B1/en
Publication of EP0077838A1 publication Critical patent/EP0077838A1/en
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Publication of EP0077838B1 publication Critical patent/EP0077838B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent
    • B27N1/0218—Mixing the material with binding agent in rotating drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00—Mixers with rotating receptacles
    • B01F29/40—Parts or components, e.g. receptacles, feeding or discharging means
    • B01F29/401—Receptacles, e.g. provided with liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/60—Safety arrangements

Definitions

  • the invention relates to a protective device for a chip gluing machine with a rotatable drum and therein and internals for the supply of glue (DE-A-3 003 547).
  • Glueing machines for chips by means of the production of chipboard have been known since the beginning of chipboard production from chips. Since that time it has been known that these gluing machines, which consist essentially of a driven horizontal mixing drum, which rotates on rollers on the outer circumference, lead to such contamination that the surfaces of the glue material coming into contact with the glue material in short intervals Mixing drum inside and the internals arranged there must be cleaned with a considerable amount of time. The average time required for this is at least once a week, depending on the size of the machine, from 12 to 36 man hours. Chipboard technology has not failed to attempt to reduce such downtimes.
  • the large-volume gluing machines mentioned at the beginning are more suitable for large-area chips, since they enable a better loosening of the chip flow into a chip veil with gentle treatment of the individual chips, but with regard to their contamination, a device in a plant for the production of chipboard, with high failures and high operating costs must be expected.
  • the object of the invention is to propose a protective device for a chip gluing machine which protects the surfaces of the internal components of the chip gluing machine which come into contact with glue, additives, chips and dust.
  • This object is achieved with the inventive characterizing part of claim 1.
  • a coating which covers the internals arranged in the gluing machine and which is releasably connected to them according to the invention makes it possible to remove the coating from the individual components when a certain degree of contamination is reached, to remove them from the gluing machine and releasably connect them to the components by a new one Replace cover and put the system back into operation with the least possible loss of time.
  • a still further embodiment with regard to rapid attachment of the cover can be seen from the characterizing part of claim 3.
  • the cover can be attached by simply inserting the push buttons into the rows of holes and the cover can be removed by tearing open the push button connection .
  • a still further embodiment of the subject matter of the invention is laid down in the characterizing part of claim 4.
  • a still further inventive embodiment is laid down in the characterizing part of claim 5, with which the changeover time can also be shortened.
  • plastic films which can be preformed according to the invention are used as coatings for the protective device, these can be used repeatedly since there is no connection between the gluing material and the preformed plastic film and the plastic film can be easily cleaned from the adhesive material due to its elasticity.
  • a gluing machine 1 shown in cross section in FIG. 1 a has a horizontally mounted drum 2, on the inside of which lifting strips 3 which, when the drum 2 rotates in the direction of the arrow 4, dissolve the chip flow of large-area chips (strands) introduced into the drum 2 and as a dissolved veil 5 in bring the effective range of a spray 6, which emerges from a series of spray nozzles 7 along the longitudinal extension of the drum 2.
  • the spray generally consists of atomized phenolic resin glue, but other types of glue can also be used to glue large-area chips.
  • the drum 2 is rotated slowly, for example by friction wheels 8.
  • the lifting strips 3 can transport the chips introduced into the drum 2 without destroying them and deliver them to the interior of the drum in accordance with the filling between the lifting strip limit and the wall, so that the chips flutter down there slowly as a veil 5 while constantly changing their position, on all sides from the spray 6 met.
  • these components are provided with coatings 10 which can be easily removed from the components in the event of contamination.
  • the use according to the invention of preferably impregnated paper and cardboard made of thin fiberboard or a combination of these has proven particularly useful. Instead of these disposable coverings, the use according to the invention of preferably antistatic, deformable plastic films as a reusable cover has also proven itself.
  • the coverings 10 can be pushed over each lifting bar 3, for example as a molded part, and are covered with the cover 10 protecting the inner surface of the drum 2 by means of longitudinal bars 11.
  • the longitudinal strips 11 themselves are arranged at certain intervals on spring-loaded pins 12 which run in bores 13 (see in particular FIG. 1c), penetrate the drum jacket 14 and on the outside of the drum 2 in the simplest form by means of eccentric drive 15 over the entire length of the drum at the same time can be moved so that an exchange of contaminated coatings 10 can take place in the simplest form.
  • the longitudinal strips 11 are also provided with coatings 10.
  • the drum 2 carries in the area of the friction wheels 8 reinforcing ribs 16, in which the eccentric shafts are guided through openings 17, for example.
  • Figure 1b shows in simplified form a push-button connection between a cover 10 (shown on an enlarged scale), which has knobs 18 on its rear side, with blind holes 19 arranged in the drum jacket 14.
  • the seams can be between a pre-formed cover 10, which surrounds a lifting bar , and a preformed cover 10 covering the inner wall of the drum 2 may be formed so that they overlap each other.
  • a Velcro fastener 20 is used according to the invention, as shown in FIG. 1d.
  • a releasable connection of coatings is particularly suitable if a multi-use antistatic plastic coating is used according to the invention as the coating;
  • the easy releasability of the push button-like connection between the inside of the drum and the plastic back and the secure cover between the individual fittings by means of a Velcro fastener guarantee that the components for the releasable connection can be used several times.
  • FIG. 2 shows a side view of the gluing machine 1, material to be glued being fed to the rotating drum 2 via a filling funnel 21.
  • the drum 2 is inclined at a slight angle to the horizontal in order to accelerate the passage of the material to be glued.
  • the glued chips exit at the end of the drum 2 via a chute 25.
  • glue is fed to the tube 9 under pressure and via Spray nozzles 7 brought into operative connection with the chip curtain 5 as a spray mist 6.
  • the spring-loaded pins 12, which are moved by an eccentric drive 15, are shown schematically, and the longitudinal strips 11, which, according to FIG. 2, extend over the entire length of the drum, are simultaneously lifted, so that removal of the dirty cover 10 is easily possible.
  • both the longitudinal strips 11 and the coverings 10 can, according to the invention, consist of a plurality of parts which can be slid on one after the other in the longitudinal direction, if it turns out, for example, that the degree of contamination in a region of the drum 2 is particularly strong.
  • the drum 2 is driven by the friction wheels 8, which are supported in bearings 23 and 24, via a drive (not shown).

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Coating Apparatus (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Description

Die Erfindung betrifft eine Schutzvorrichtung für eine Spänebeleimungsmaschine mit einer drehbaren Trommel und darin und Einbauten für die Zuführung von Leim (DE-A-3 003 547).The invention relates to a protective device for a chip gluing machine with a rotatable drum and therein and internals for the supply of glue (DE-A-3 003 547).

Beleimungsmaschinen für Späne im Wege der Herstellung von Spanplatten sind seit Beginn der Spanplattenherstellung aus Späne bekannt. Seit dieser Zeit ist es bekannt, daß diese Beleimungsmaschinen, die im wesentlichen aus einer angetriebenen horizontalen Mischtrommel bestehen, die am Außenumfang auf Rollen geführt rotiert, zu einer derartigen Verschmutzung führt, daß in kurzen Abständen die an den mit dem Beleimungsmaterial in Kontakt kommenden Oberflächen der Mischtrommelinnenseite und der dort angeordneten Einbauten mit beachtlichem Zeitaufwand gereinigt werden müssen. Der Zeitaufwand hierfür beträgt im Durchschnitt mindestens einmal wöchentlich je nach Größe der Maschine 12 bis 36 Mann-Stunden. Die Spanplattentechnik hat es nicht unterlassen, Versuche zu unternehmen, um derartige Ausfallzeiten zu verringern. Darüberhinaus führte auch eine Reinigung der Beleimungsmaschinen, da nur mit Meißel, Hammer und Preßluftgeräten gearbeitet werden konnte, zu einem sehr starken Verschleiß der Beleimungsmaschine und auch zu einer Beeinträchtigung der Funktion der Beleimungsmaschine. Insbesondere traten durch ungleichförmige Verschmutzung Unwuchten auf, die zum Verschleiß der Antriebsteile führten. Auch war es nicht auszuschließen, daß durch Abbrechen von agglomeriertem Material, das mit Leim hoch angereichert ist, eine Ungleichförmigkeit in der Beleimung eintrat, die zu Ausschuß-Spanplatten führte. Beleimungsqualität und Durchsatzleistung sinken in einer derartig verschmutzten Maschine.Glueing machines for chips by means of the production of chipboard have been known since the beginning of chipboard production from chips. Since that time it has been known that these gluing machines, which consist essentially of a driven horizontal mixing drum, which rotates on rollers on the outer circumference, lead to such contamination that the surfaces of the glue material coming into contact with the glue material in short intervals Mixing drum inside and the internals arranged there must be cleaned with a considerable amount of time. The average time required for this is at least once a week, depending on the size of the machine, from 12 to 36 man hours. Chipboard technology has not failed to attempt to reduce such downtimes. In addition, cleaning the gluing machines, since only chisels, hammers and compressed air equipment could be used, led to very heavy wear on the gluing machine and also to impaired the function of the gluing machine. In particular, unbalance occurred due to irregular contamination, which led to wear of the drive parts. It also could not be ruled out that breaking off agglomerated material, which was highly enriched with glue, would result in a nonuniformity in the glueing, which would lead to scrap chipboard. Gluing quality and throughput decrease in such a dirty machine.

Im Zuge der Weiterentwicklung wurden anstelle großvolumiger Trommeln mit geringer Drehzahl hochtourige Rührwerksmischer eingeführt, bei denen zufolge der hohen Relativgeschwindigkeit zwischen zu beleimendem Span, Beleimungsmaterial und Einbauten in der Mischtrommel ein sogenannter Wischeffekt auftrat, der auch einen gewissen Selbstreinigungseffekt für die Beleimungsmaschine mit sich brachte.In the course of the further development, instead of large-volume drums with low speed, high-speed agitator mixers were introduced, in which due to the high relative speed between the chip to be glued, gluing material and built-in components in the mixing drum, a so-called wiping effect occurred, which also had a certain self-cleaning effect for the gluing machine.

Im Zuge der Weiterentwicklung der Spanplattenherstellung wird nunmehr eine Spanplatte angestrebt, die aus technischen Bedingungen sehr großflächige Späne, sogenannte Wafers und Strands, beispielsweise in Flächenabmessungen von 20 mm mal 70 mm und einer Dicke von ca. 0,4-0,8 mm erfordert. Die Beleimung derartiger Späne ist in hochtourigen Rührwerksmischern wegen der Gefahr des Zertrümmerns derartiger großflächiger Späne nicht möglich. Auch würde der Wischeffekt, der sicherstellt, daß die ganze Spanoberfläche mit Beleimungsmaterial überzogen wird, bei großflächigen Spänen zwangsläufig zur Zerkleinerung dieser Späne führen. Insoweit sind derartige Rührwerksmischer für die Beleimung von Strands und Wafers nicht geeignet.In the course of the further development of chipboard production, a chipboard is now being sought which, due to technical conditions, requires very large chips, so-called wafers and strands, for example in area dimensions of 20 mm by 70 mm and a thickness of approximately 0.4-0.8 mm. The gluing of such chips is not possible in high-speed agitator mixers because of the risk of such large-area chips being broken up. The wiping effect, which ensures that the entire chip surface is coated with glue, would inevitably lead to the size reduction of these chips. To this extent, such agitator mixers are not suitable for gluing strands and wafers.

Die eingangs erwähnten großvolumigen Beleimungsmaschinen sind für großflächige Späne besser geeignet, da sie eine bessere Auflockerung des Spänestromes in einen Späneschleier ermöglichen bei schonender Behandlung der Einzelspäne, jedoch im Hinblick auf ihre Verschmutzung eine Einrichtung in einer Anlage zur Herstellung von Spanplatten, bei der mit hohen Ausfällen und hohen Betriebskosten gerechnet werden muß.The large-volume gluing machines mentioned at the beginning are more suitable for large-area chips, since they enable a better loosening of the chip flow into a chip veil with gentle treatment of the individual chips, but with regard to their contamination, a device in a plant for the production of chipboard, with high failures and high operating costs must be expected.

Ausgehend von diesen Voraussetzungen liegt der Erfindung die Aufgabe zugrunde, eine Schutzvorrichtung für eine Spanbeleimungsmaschine vorzuschlagen, die die Oberflächen der mit dem aus Leim, Zusätzen, Spänen und Staub bestehendem Beleimungsmaterial in Berührung kommenden inneren Bauteile der Spanbeleimungsmaschine vor Verschmutzung schützt. Diese Aufgabe wird mit dem erfinderischen Kennzeichen des Anspruchs 1 gelöst. Ein Überzug, der die im Inneren der Beleimungsmaschine angeordneten Einbauten überdeckt und der erfindungsgemäß lösbar mit diesen verbunden ist, ermöglicht es, bei Erreichen eines bestimmten Verschmutzungsgrades den Überzug von den einzelnen Bauteilen abzunehmen, aus der Beleimungsmaschine herauszunehmen und durch einen neuen lösbar mit den Bauteilen verbundenen Überzug zu ersetzen und die Anlage mit dem geringstmöglichem Zeitverlust wieder in Betrieb zu setzen.Based on these requirements, the object of the invention is to propose a protective device for a chip gluing machine which protects the surfaces of the internal components of the chip gluing machine which come into contact with glue, additives, chips and dust. This object is achieved with the inventive characterizing part of claim 1. A coating which covers the internals arranged in the gluing machine and which is releasably connected to them according to the invention makes it possible to remove the coating from the individual components when a certain degree of contamination is reached, to remove them from the gluing machine and releasably connect them to the components by a new one Replace cover and put the system back into operation with the least possible loss of time.

Als eine besonders bevorzugte Ausgestaltung des Erfindungsgegenstandes hat sich das erfindungsgemäße Merkmal des Anspruchs 2 herausgestellt. Durch die Vorformung des Überzugs im Hinblick auf die später zu überdeckenden Bauteile wird die Austauschzeit beachtlich verringert.The inventive feature of claim 2 has emerged as a particularly preferred embodiment of the subject matter of the invention. The preforming of the coating with regard to the components to be covered later reduces the replacement time considerably.

Eine noch weitere Ausgestaltung im Hinblick auf eine rasche Befestigung des Überzugs ist dem Kennzeichen des Anspruchs 3 zu entnehmen. Befinden sich beispielsweise druckknopfähnliche Elemente auf der Seite des überzugs, die dem Mischvorgang abgewandt ist und sind beispielsweise in der Trommelinnenseite entsprechende Bohrungen vorgesehen, so kann durch einfaches Einbringen der Druckknöpfe in die Bohrungsreihen eine Befestigung des Überzugs stattfinden und eine Entfernung des Überzugs durch Aufreißen der Druckknopfverbindung.A still further embodiment with regard to rapid attachment of the cover can be seen from the characterizing part of claim 3. For example, if there are push button-like elements on the side of the cover that faces away from the mixing process and, for example, appropriate holes are provided in the inside of the drum, the cover can be attached by simply inserting the push buttons into the rows of holes and the cover can be removed by tearing open the push button connection .

Eine noch weitere Ausgestaltung des Erfindungsgegenstandes ist im Kennzeichen des Anspruchs 4 niedergelegt. Durch Vorsehen einer selbsthaftenden Verbindung von Teil- überdeckungen wird zum einen ein Austausch einzelner Teile, die besonders stark verschmutzt sind, ermöglicht, ohne die nicht so sehr verschmutzten Überdeckungen zwangsläufig entfernen zu müssen und zum anderen eine kurze Umrüstzeit erreicht.A still further embodiment of the subject matter of the invention is laid down in the characterizing part of claim 4. Providing a self-adhesive connection of partial coverings makes it possible, on the one hand, to replace individual parts which are particularly heavily soiled, without necessarily having to remove the not very dirty coverings, and on the other hand, achieving a short changeover time.

Eine noch weitere erfinderische Ausgestaltung ist im Kennzeichen des Anspruchs 5 niedergelegt, mit dem ebenfalls die Umrüstzeit verkürzt werden kann.A still further inventive embodiment is laid down in the characterizing part of claim 5, with which the changeover time can also be shortened.

Werden erfindungsgemäß vorformbare Kunststoffolien als Überzüge für die Schutzvorrichtung verwendet, so sind diese mehrfach verwendbar, da eine Verbindung zwischen Beleimungsmaterial und vorgeformter Kunststoffolie nicht stattfindet und die Kunststoffolie zufolge ihrer Elastizität von dem Beleimmaterial leicht gereinigt werden kann.If plastic films which can be preformed according to the invention are used as coatings for the protective device, these can be used repeatedly since there is no connection between the gluing material and the preformed plastic film and the plastic film can be easily cleaned from the adhesive material due to its elasticity.

Die Erfindung wird nachfolgend anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert.The invention is explained in more detail below with reference to exemplary embodiments shown in the drawing.

Es zeigen :

  • Figur 1a einen Querschnitt durch eine Beleimungsmaschine mit erfindungsgemäßen Überzug
  • Figur 1b eine Ausgestaltung einer lösbaren Befestigung des Überzugs
  • Figur 1c eine andere Ausgestaltung einer lösbaren Befestigung des Überzugs
  • Figur 1 d eine insbesondere für den Kunststoff als Überzug geeignete lösbare Befestigung
  • Figur 2 eine Seitenansicht einer Beleimungsmaschine mit Darstellung einer bevorzugten erfinderischen lösbaren Befestigung eines Überzugs.
Show it :
  • Figure 1a shows a cross section through a gluing machine with a coating according to the invention
  • Figure 1b shows an embodiment of a releasable attachment of the cover
  • Figure 1c another embodiment of a releasable attachment of the cover
  • Figure 1 d a releasable attachment particularly suitable for plastic as a coating
  • Figure 2 is a side view of a gluing machine showing a preferred inventive releasable attachment of a coating.

Soweit bei der Figurenbeschreibung in den einzelnen Figuren gleiche Bauteile auftreten, werden diese mit denselben Bezugsziffern versehen.Insofar as the same components occur in the description of the figures in the individual figures, these are provided with the same reference numbers.

Eine in Figur 1a im Querschnitt dargestellte Beleimungsmaschine 1 besitzt eine horizontal gelagerte Trommel 2, an deren Innenseite Hubleisten 3, die bei Rotation der Trommel 2 in Pfeilrichtung 4 den in die Trommel 2 eingebrachten Spänestrom großflachiger Späne (Strands) auflösen und als aufgelösten Schleier 5 in den Wirkungsbereich eines Sprühnebels 6 bringen, der aus einer Reihe von Sprühdüsen 7 entlang der Längserstreckung der Trommel 2 austritt. Der Sprühnebel besteht im allgemeinen aus verdüstem Phenolharzleim, jedoch können auch andere Leimarten zur Beleimung von großflächigen Spänen benutzt werden.A gluing machine 1 shown in cross section in FIG. 1 a has a horizontally mounted drum 2, on the inside of which lifting strips 3 which, when the drum 2 rotates in the direction of the arrow 4, dissolve the chip flow of large-area chips (strands) introduced into the drum 2 and as a dissolved veil 5 in bring the effective range of a spray 6, which emerges from a series of spray nozzles 7 along the longitudinal extension of the drum 2. The spray generally consists of atomized phenolic resin glue, but other types of glue can also be used to glue large-area chips.

Um ein Zerstören der großflächigen Späne zu vermeiden, wird die Tromel 2 langsam rotierend, beispielsweise von Reibrädern 8, angetrieben. Damit können die Hubleisten 3 die in die Trommel 2 eingebrachten Späne ohne Zerstörung hochtransportieren und entsprechend der Füllung zwischen Hubleistenbegrenzung und Wand an den Innenraum der Trommel abgeben, so daß die Späne dort langsam als Schleier 5 unter stetem Wechsel ihrer Lage herabflattern, allseits vom Sprühnebel 6 getroffen.In order to avoid destroying the large-area chips, the drum 2 is rotated slowly, for example by friction wheels 8. Thus, the lifting strips 3 can transport the chips introduced into the drum 2 without destroying them and deliver them to the interior of the drum in accordance with the filling between the lifting strip limit and the wall, so that the chips flutter down there slowly as a veil 5 while constantly changing their position, on all sides from the spray 6 met.

Zur Vermeidung der Verschmutzung der innenseite der Trommel 2 und der Hubleisten 3 sowie eines die Sprühdüsen verbindenden Rohres 9 werden diese Bauteile mit Überzügen 10 versehen, die leicht von den Bauteilen bei Verschmutzung abgenommen werden können. Die erfindungsgemäße Verwendung von vorzugsweise imprägniertem Papier und Karton von dünnen Faserplatten oder einer Kombination dieser hat sich besonders bewährt. Anstelle dieser Wegwerfüberzüge hat sich insbesondere auch die erfindungsgemäße Verwendung von vorzugsweise antistatischem verformbaren Kunststoffolien als mehrfach benutzbarer Überzug bewährt.To avoid contamination of the inside of the drum 2 and the lifting strips 3 and of a tube 9 connecting the spray nozzles, these components are provided with coatings 10 which can be easily removed from the components in the event of contamination. The use according to the invention of preferably impregnated paper and cardboard made of thin fiberboard or a combination of these has proven particularly useful. Instead of these disposable coverings, the use according to the invention of preferably antistatic, deformable plastic films as a reusable cover has also proven itself.

Wie der Figur 1 zu entnehmen ist, sind die Überzüge 10, beispielsweise als Formteil, über jede Hubleiste 3 schiebbar und werden mit dem die Innenfläche der Trommel 2 schützenden Überzug 10 mittels Längsleisten 11 verbindend überdeckt. Die Längsleisten 11 selbst sind in bestimmten Abständen an federbelasteten Zapfen 12 angeordnet, die in Bohrungen 13 (siehe insbesondere Figur 1c) geführt, den Trommelmantel 14 durchdringen und an der Außenseite der Trommel 2 in einfachster Form mittels Exzenterantrieb 15 über die gesamte Länge der Trommel gleichzeitig bewegt werden können, so daß in einfachster Form ein Austausch verschmutzer Überzüge 10 erfolgen kann. Selbstverständlich sind die Längsleisten 11 ebenfalls mit Überzügen 10 versehen.As can be seen in FIG. 1, the coverings 10 can be pushed over each lifting bar 3, for example as a molded part, and are covered with the cover 10 protecting the inner surface of the drum 2 by means of longitudinal bars 11. The longitudinal strips 11 themselves are arranged at certain intervals on spring-loaded pins 12 which run in bores 13 (see in particular FIG. 1c), penetrate the drum jacket 14 and on the outside of the drum 2 in the simplest form by means of eccentric drive 15 over the entire length of the drum at the same time can be moved so that an exchange of contaminated coatings 10 can take place in the simplest form. Of course, the longitudinal strips 11 are also provided with coatings 10.

Die Trommel 2 trägt im Bereich der Reibräder 8 Verstärkungsrippen 16, in denen durch Öffnungen 17 beispielsweise die Exzenterwellen geführt gelagert sind.The drum 2 carries in the area of the friction wheels 8 reinforcing ribs 16, in which the eccentric shafts are guided through openings 17, for example.

Figurlb zeigt in vereinfachter Form eine Druckknopfverbindung zwischen einem Überzug 10 (in vergrößertem Maßstab dargestellt), der an seiner Rückseite Noppen 18 trägt, mit im Trommelmantel 14 angeordneten Sacklochbohrungen 19. In diesem Falle können die Nahtstellen zwischen einem vorgeformten Überzug 10, der eine Hubleiste umkleidet, und einem vorgeformten Überzug 10, der die Innenwand der Trommel 2 bedeckt, so ausgebildet sein, daß sie sich gegenseitig überlappen.Figure 1b shows in simplified form a push-button connection between a cover 10 (shown on an enlarged scale), which has knobs 18 on its rear side, with blind holes 19 arranged in the drum jacket 14. In this case, the seams can be between a pre-formed cover 10, which surrounds a lifting bar , and a preformed cover 10 covering the inner wall of the drum 2 may be formed so that they overlap each other.

Damit durch diese Überlappungen keine Beleimungsmaterialien, die aus Phenolharzleim und vorhandenem Staub bzw. auch Teilen von Soänen bestehen können, an die Trommelinnenwand oder an die Hubleisten 3 gelangen können, wird erfindungsgemäß, wie in Figur 1d dargestellt, ein Klettenverschluß 20 verwendet. Eine derartig lösbare Verbindung von Überzügen eignet sich insbesondere dann, wenn als Überzug ein mehrfach verwendbarer antistatischer Kunststoffüberzug erfindungsgemäß benutzt, wird ; die leichte Lösbarkeit der druckknopfartigen Verbindung zwischen Trommelinnenwand und Kunststoff rückseite sowie die sichere Abdeckung zwischen den einzelnen Formstücken mittels Klettenverschluß geben die Gewähr dafür, daß auch die Bauteile zur lösbaren Verbindung mehrmals benutzt werden können.So that no glueing materials, which can consist of phenolic resin glue and existing dust or also parts of soybeans, can reach the inner drum wall or the lifting strips 3 through these overlaps, a Velcro fastener 20 is used according to the invention, as shown in FIG. 1d. Such a releasable connection of coatings is particularly suitable if a multi-use antistatic plastic coating is used according to the invention as the coating; The easy releasability of the push button-like connection between the inside of the drum and the plastic back and the secure cover between the individual fittings by means of a Velcro fastener guarantee that the components for the releasable connection can be used several times.

Figur 2 zeigt in der Seitenansicht die Beleimungsmaschine 1, wobei über einen Einfülltrichter 21 zu beleimendes Material der rotierenden Trommel 2 zugeführt wird. Die Trommel 2 ist unter einem leichten Winkel gegenüber der Horizontalen geneigt, um den Durchlauf des zu beleimenden Materials zu beschleunigen. Die beleimten Späne treten am Ende der Trommel 2 über eine Schurre 25 aus. Über eine Zuführung 22 wird Leim dem Rohr 9 unter Druck zugeführt und über Sprühdüsen 7 als Sprühnebel 6 in Wirkverbindung mit dem Spanschleier 5 gebracht. Schematisch dargestellt sind die federbelasteten Zapfen 12, die von einem Exzenterantrieb 15 bewegt, die Längsleisten 11, die gemäß Figur 2 über die gesamte Länge der Trommel sich erstrecken, gleichzeitig anheben, so daß eine Entnahme des verschmutzten Überzuges 10 leicht möglich ist. Für gewisse Sonderfälle können sowohl die Längsleisten 11 als auch die Überzüge 10 erfindungsgemäß aus mehreren hintereinander in Längsrichtung aufschiebbaren Teilen bestehen, wenn sich beispielsweise herausstellt, daß der Verschmutzungsgrad in einem Bereich der Trommel 2 besonders stark ist. Über einen nicht dargestellten Antrieb wird die Trommel2 von den Reibrädern 8, die sich in Lagern 23 bzw. 24 abstützen, angetrieben.FIG. 2 shows a side view of the gluing machine 1, material to be glued being fed to the rotating drum 2 via a filling funnel 21. The drum 2 is inclined at a slight angle to the horizontal in order to accelerate the passage of the material to be glued. The glued chips exit at the end of the drum 2 via a chute 25. Via a feed 22, glue is fed to the tube 9 under pressure and via Spray nozzles 7 brought into operative connection with the chip curtain 5 as a spray mist 6. The spring-loaded pins 12, which are moved by an eccentric drive 15, are shown schematically, and the longitudinal strips 11, which, according to FIG. 2, extend over the entire length of the drum, are simultaneously lifted, so that removal of the dirty cover 10 is easily possible. For certain special cases, both the longitudinal strips 11 and the coverings 10 can, according to the invention, consist of a plurality of parts which can be slid on one after the other in the longitudinal direction, if it turns out, for example, that the degree of contamination in a region of the drum 2 is particularly strong. The drum 2 is driven by the friction wheels 8, which are supported in bearings 23 and 24, via a drive (not shown).

Claims (6)

1. Protective arrangement for a chip-glueing machine (1) with a rotary drum (2) and lifting bars (3) arranged therein for the chips to be glued and means for the supply of glue, characterised in that a cover (10) overlying the inside of the drum (2), the lifting bars (3) and the means for the supply of glueing material (7,9) is releasably connected to these components.
2. Protective arrangement according to claim 1, characterised in that the cover (10) is preformed corresponding to the surface shape of the components (2, 3, 9) to be covered.
3. Protective arrangement according to claim 1 and/or 2, characterised in that the cover (10) is provided with holding elements (18, 20) at its side remote from the chips (5) which are to be mixed and glued, the elements being readily releasably connected to securing elements (19, 11, 12) arranged on the component to be covered.
4. Protective arrangement according to one or more of the preceding claims, characterised in that preformed covers (10) adjacent to each other are sealed against the ingress of dirt at their overlapping region by means of a burr-fastener (20).
5. Protective arrangement according to one or more of claims 1 to 3, characterised in that preformed covers (10) adjacent to each other are pressed in their adjoining region by connecting strips (11) against the inner wall of the rotary drum (2), and the connecting strips (11) are held at the outside of the drum (2) by resilient loading means (12).
6. Protective arrangement according to any one of the preceding claims 1 to 5, characterised in that preformable, preferably anti-static plastic foils are used as a re-usable cover.
EP81107673A 1981-09-26 1981-09-26 Protective cover for a chip glueing machine Expired EP0077838B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8181107673T DE3165569D1 (en) 1981-09-26 1981-09-26 Protective cover for a chip glueing machine
EP81107673A EP0077838B1 (en) 1981-09-26 1981-09-26 Protective cover for a chip glueing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81107673A EP0077838B1 (en) 1981-09-26 1981-09-26 Protective cover for a chip glueing machine

Publications (2)

Publication Number Publication Date
EP0077838A1 EP0077838A1 (en) 1983-05-04
EP0077838B1 true EP0077838B1 (en) 1984-08-15

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ID=8187933

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81107673A Expired EP0077838B1 (en) 1981-09-26 1981-09-26 Protective cover for a chip glueing machine

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EP (1) EP0077838B1 (en)
DE (1) DE3165569D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3324106A1 (en) * 1983-07-05 1985-01-17 Draiswerke Gmbh, 6800 Mannheim METHOD FOR GLUING WOOD CHIPS AND THE LIKE WITH LIQUID GLUE AND DEVICE FOR CARRYING OUT THE METHOD

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Publication number Priority date Publication date Assignee Title
DE3503896A1 (en) * 1985-02-06 1986-08-07 Draiswerke Gmbh, 6800 Mannheim LINING FOR A CONTAINER OF A MIXER
US5056924A (en) * 1990-01-26 1991-10-15 Mcneilus Truck And Manufacturing, Inc. System for mixing and dispensing concrete
US5427449A (en) * 1991-11-05 1995-06-27 Mcneilus Truck And Manufacturing, Inc. Concrete mixing drum fin structure
DE102014101173A1 (en) * 2014-01-30 2015-08-13 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for dispersing wood particles
CN105058612A (en) * 2015-07-29 2015-11-18 东莞市奇格斯电子科技有限公司 Color master batch stirring device

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US2630301A (en) * 1950-11-16 1953-03-03 Kendrick W Lentz Rotary elastic drum blender
DE1183671B (en) * 1959-02-21 1964-12-17 Max Himmelheber Dipl Ing Devices for adhering wood chips or similar bulk material with binding agents or sprayable or atomizable substances
DE1653181A1 (en) * 1967-01-17 1971-12-23 Draiswerke Gmbh Device for wetting chip-like and fibrous material, in particular wood fibers, with binding agents
GB1245819A (en) * 1968-12-02 1971-09-08 Tech Ontwikkelings Bureau Van Drum mixer for mixing wood wool with a binder
US4049240A (en) * 1976-06-16 1977-09-20 Ecolaire Incorporated Continuous mixer and unloader
DE3003547A1 (en) * 1979-03-12 1980-09-25 Ammann U Maschf Ag DEVICE FOR CONTINUOUSLY TREATING MIXTURE FROM SOLIDS AND A THERMOPLASTIC BINDING AGENT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3324106A1 (en) * 1983-07-05 1985-01-17 Draiswerke Gmbh, 6800 Mannheim METHOD FOR GLUING WOOD CHIPS AND THE LIKE WITH LIQUID GLUE AND DEVICE FOR CARRYING OUT THE METHOD

Also Published As

Publication number Publication date
DE3165569D1 (en) 1984-09-20
EP0077838A1 (en) 1983-05-04

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