EP0550000A1 - Apparatus for electrophoretic painting - Google Patents

Apparatus for electrophoretic painting Download PDF

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Publication number
EP0550000A1
EP0550000A1 EP92121813A EP92121813A EP0550000A1 EP 0550000 A1 EP0550000 A1 EP 0550000A1 EP 92121813 A EP92121813 A EP 92121813A EP 92121813 A EP92121813 A EP 92121813A EP 0550000 A1 EP0550000 A1 EP 0550000A1
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EP
European Patent Office
Prior art keywords
lamellae
conveyor belt
chains
chain
lamella
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
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EP92121813A
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German (de)
French (fr)
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EP0550000B1 (en
Inventor
Michael Hentschl
Gerhard Brendel
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Nuetro Maschinen- und Anlagenbau & Co KG GmbH
Nutro Maschinen und Anlagenbau GmbH and Co KG
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Nuetro Maschinen- und Anlagenbau & Co KG GmbH
Nutro Maschinen und Anlagenbau GmbH and Co KG
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Publication of EP0550000A1 publication Critical patent/EP0550000A1/en
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/22—Servicing or operating apparatus or multistep processes

Definitions

  • the invention relates to a device for electrophoretic dip painting with an endless conveyor belt provided at least on one side with a drive chain.
  • German Offenlegungsschrift 38 43 544 for the electrophoretic continuous immersion painting of small parts and bulk goods that the paint is fed through the paint bath on a conveyor connected as an electrode lead, which has an electrically insulating coating with the exception of the required contact surfaces.
  • the contact surfaces of the paint are changed at least once by placing the paint on its base, ie the conveyor belt, in a different position. After such a change in position, the original contact points between the material to be painted and the conveyor belt and with one another are available for painting.
  • the change in position of the paint on the conveyor belt can be achieved in the known continuous immersion painting system by stationary or movable baffles, by moving parts of an articulated conveyor belt against each other or by jerky shaking of the conveyor belt.
  • the conveyor belt made of stainless steel as a spiral wire belt with a round or triangular profile of the spirals is used to convey rotationally symmetrical Provide parts with carriers.
  • a continuous painting which is behind the immersion bath u. a. a baking oven, through which the paint is conveyed on a conveyor belt that is thermally stable with respect to the baking temperatures, usually requires the transfer of the paint from one conveyor belt to another.
  • a baking oven through which the paint is conveyed on a conveyor belt that is thermally stable with respect to the baking temperatures, usually requires the transfer of the paint from one conveyor belt to another.
  • the invention has for its object to enable a complete electrophoretic dip painting with reduced mechanical engineering effort and possibly also with a continuous painting system a gentle transfer of the paint from one conveyor belt to another.
  • the conveyor belt from surveys with ex. a serrated surface provided slats, which are advantageously alternately offset from each other, preferably such that the middle of three slats is offset from the other two slats by an amount different from the chain pitch.
  • a serrated surface provided slats, which are advantageously alternately offset from each other, preferably such that the middle of three slats is offset from the other two slats by an amount different from the chain pitch.
  • the radius of the curve of the deflection can be adapted to each workpiece contour by changing the length of the slat belt, for example by means of tensioning units, in such a way that an optimal rearrangement of the parts to be painted results.
  • the lamella construction allows the conveyor belt assigned to the bath container and a subsequent belt to take over the parts to be provided with lamellas which intermesh with one another in the transfer area lying between the chain wheels of the two conveyor belts. No height difference then needs to be overcome during the transfer, which enables extremely gentle transfer of the workpieces.
  • similar conveyor belts can be used for a continuous continuous immersion painting system.
  • the comb-like engagement in the transfer area between the adjacent sprockets of successive conveyor belts results, for example, from the fact that the distance between corresponds to the longitudinal axes of adjacent cross bars of the single or multiple chain pitch and the middle of three slats is offset from the other two slats.
  • the lamellae then have free ends, each protruding from one another by a gap, due to the geometry which protrudes with respect to the crossbars during the rolling on the chain wheels, that is to say in the turning points.
  • the projecting ends of the correspondingly arranged lamellae of the following transport hand engage in the gaps between the free ends, so that there is a continuous, comb-like intermeshing and transfer of the parts from one to the other conveyor belt without falling paths.
  • the tooth flanks of adjacent teeth facing each other should form a right angle;
  • the angular dimension can be adjusted accordingly depending on the most favorable center of gravity when taking over. This effect can also be achieved if radii or curves are provided between the tooth flanks.
  • the teeth of the slat conveyor belt ensure that they rest securely on the conveyor belt without any further measures.
  • the front rod receiving bore of the slats is advantageously designed as an elongated hole, the freedom of movement required for the slats in the reversal points can be achieved with a crossbar division that is larger than the chain pitch.
  • spacer sleeves arranged on the crossbars between the lamellae which should preferably have the same outer diameter as the bushes of the drive chains, This results in a lateral support of the slats, which therefore does not tip over due to the workpiece loading.
  • the spacer bushes offer favorable points of attack for - especially useful for large belt widths - axial supports for turning and reversing guides.
  • FIG. 1 of a continuous continuous immersion painting system 1 A feed (feed table, feed conveyor) 2, a bath container 3 with its associated conveyor belt 4 and a subsequent conveyor belt 6 guided through a baking oven 5 are shown in FIG. 1 of a continuous continuous immersion painting system 1.
  • the feed conveyor 2 brings the schematically indicated parts 7 in a single-layer to the conveyor belt 4, which passes through the painting bath 8 in the bath container 3.
  • the front and rear drive rollers designed as chain wheels 9 and 11 are connected synchronously.
  • the conveyor belts 4 and 6 are designed in lamella construction; they consist of lamellae 12, which are arranged on cross bars 14 connected to drive chains 13 and are separated from one another by spacer sleeves 20 (cf. FIG. 3).
  • the outer diameter of the spacer sleeves 20 is equal to the outer diameter of the bushes of the drive chains 13.
  • Each lamella 12 according to the exemplary embodiment has six teeth 15, whose pitch T calculated from tip to tip corresponds to the pitch of the drive chains 13.
  • the teeth 15 are of different heights, as is evident from the height difference 16 shown in FIG. 2, and the tooth flanks 17 facing one another are adjacent Teeth form a right angle 18.
  • the slats 12 have, since the crossbar division is larger than the chain pitch, namely corresponds to 3 times the chain pitch, in addition to a cylindrical rod slot 19 and 21 designed as an elongated hole.
  • the lamellae 12 are arranged offset such that the middle of three lamellae 12a is offset in relation to the other two lamellae 12b and 12c in the transport direction 22. While the distance between the longitudinal axes 23 of adjacent cross bars 14 corresponds to the triple chain pitch T, the offset dimension of the respective middle lamella 12a is only 2.5 times the chain pitch T.
  • the lamellae 12b and 12c end - in the transport direction 22 seen - thus in front of a cross bar 14, and the middle lamellae 12a project with their free ends beyond the cross bar 14 (cf. FIG. 3).
  • a deflection 27 indicated schematically in FIG. 1 is located approximately in the middle of the bath container.
  • the conveyor belt 4 guided on both sides by the drive chains 13 runs for this purpose, first inclined into the bath container 3, namely until it has reached the deflection 27 (turning point); from there it then rises at an angle corresponding to the previous inclination, so that it finally exits the paint bath and reaches the transfer area Y.
  • the teeth of the inclined and the inclined slats 12 of the conveyor belt 4 approach each other, which is equivalent to a rearrangement of the parts 7, so that the previous contact points can then be completely and freely washed by the paint.
  • the deflection radius which is set in the deflection 27 on account of the inclinations of the incoming and outgoing conveyor belt 4 can be changed by tensioning or relaxing the belt, so that there is an optimal rearrangement of the parts or a change in the contact points.
  • the conveyor belt 4 consisting of slats 12 thus not only enables an automatically changing position of the paint on the conveyor belt and thus free access to the entire surface while passing through the bath container 3, but also in combination with a similar, ie also consisting of slats 12 , subsequent conveyor belt 6 a gentle transfer from one surface to the other, which does not damage the surface completely wetted by the paint Conveyor belt.
  • the conveyor belt can also consist of individual slats 29 which are connected to one another in an articulated manner to form single-row chains 28. 6, two lamellae 29 are connected to each other by means of a rivet or metal bolt 30. Several such slat chains arranged parallel to each other then form a conveyor belt with a relatively small mass and a large opening cross section.
  • stabilizing slats 31 can also be arranged parallel to individual slats 29 of a slat chain 28, as shown in the drawing in FIG. 7. Expediently then - as shown in Fig. 7 - single lamella 29 and lamella pairs 29, 31 alternate.
  • Roller-shaped chain wheels 32 which are provided with peripheral slots 33 for guiding the plate chains 28 and rivet head receptacles 34, serve to guide and deflect the plate chains 28.
  • These chain wheels can be formed in one piece or consist of individual disks which are arranged next to one another and form circumferential slots 33.
  • the lamella chains 28 can also be guided in U-profiles 35, which in turn consist of two lamellae 37, 38 each connected by rivets 36 (FIG. 9).
  • the U-shaped guides 35 can also consist of a plurality of one-piece U-profiles 39 arranged next to one another (FIG. 10).
  • a particularly secure guidance is obtained if the lamella chains 28 in box-shaped guides 40 with an upper slot 41 and optionally additionally a lower slot 42 are guided.
  • Such guides can each consist of two U-profiles 43, 44.
  • conveyor belts consisting of several parallel slat chains results from the fact that the individual slat chains of two adjacent conveyor belts intermesh in the area of their joint and form a particularly large overload zone due to the lack of cross bars connecting the slats. This allows a smooth transition of the goods to be transported or painted.

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  • Chemical & Material Sciences (AREA)
  • Coating Apparatus (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chain Conveyers (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Photographic Developing Apparatuses (AREA)

Abstract

An apparatus for electrophoretic dip painting of workpieces (7) which are transported on an endless conveyor belt (4, 6) which is provided with a drive chain on at least one side, the conveyor belt consisting of strip-like lamellae (12, 12a, 12b, 12c; 29, 31) which are provided with a jagged surface and which, for example, are alternately offset with respect to one another, permits complete electrophoretic dip painting involving little expenditure in terms of mechanical engineering. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum elektrophoretischen Tauchlackieren mit einem zumindest an einer Seite mit einer Antriebskette versehenen endlosen Transportband.The invention relates to a device for electrophoretic dip painting with an endless conveyor belt provided at least on one side with a drive chain.

Um ein unvollständiges Lackieren von Kleinteilen wie Schrauben, Muttern, Scharnieren und Beschlägen zu vermeiden, ist es aus der deutschen Offenlegungsschrift 38 43 544 für das elektrophoretische Durchlauf-Tauchlackieren von Kleinteilen und Schüttgut bekannt, das Lackiergut auf einem als Elektrode geschalteten Förderer durch das Lackierbad zu führen, der mit Ausnahme der erforderlichen Kontaktflächen eine elektrisch isolierende Beschichtung besitzt. Während des Lackierens werden die Kontaktflächen des Lackierguts mindestens einmal geändert, indem das Lackiergut auf seiner Unterlage, d.h. dem Transportband in eine andere Lage gebracht wird. Nach einer solchen Lageänderung sind die ursprünglichen Kontakstellen zwischen dem Lackiergut und dem Transportband sowie untereinander einer Lackierung zugänglich. Die Lageänderung des Lackierguts auf dem Transportband läßt sich bei der bekannten Durchlauf-Tauchlackieranlage durch stationäre oder verschiebbare Schikanen, durch Verschieben von Teilen eines gegliederten Transportbandes gegeneinander oder durch stoßartiges Erschüttern des Transportbandes erreichen. Das zum Beispiel aus rostfreiem Stahl als Spiraldrahtgurt mit rundem oder dreieckigem Profil der Spiralen bestehende Transportband ist beim Fördern von rotationssymmetrischen Teilen mit Mitnehmern versehen.In order to avoid incomplete painting of small parts such as screws, nuts, hinges and fittings, it is known from German Offenlegungsschrift 38 43 544 for the electrophoretic continuous immersion painting of small parts and bulk goods that the paint is fed through the paint bath on a conveyor connected as an electrode lead, which has an electrically insulating coating with the exception of the required contact surfaces. During painting, the contact surfaces of the paint are changed at least once by placing the paint on its base, ie the conveyor belt, in a different position. After such a change in position, the original contact points between the material to be painted and the conveyor belt and with one another are available for painting. The change in position of the paint on the conveyor belt can be achieved in the known continuous immersion painting system by stationary or movable baffles, by moving parts of an articulated conveyor belt against each other or by jerky shaking of the conveyor belt. For example, the conveyor belt made of stainless steel as a spiral wire belt with a round or triangular profile of the spirals is used to convey rotationally symmetrical Provide parts with carriers.

Ein kontinuierliches Lackieren, dem sich hinter dem Tauchbad u. a. ein Einbrennofen anschließt, durch den das Lackiergut auf einem gegenüber den Einbrenntemperaturen thermisch stabilen Transportband gefördert werden, setzt üblickerweise eine Übergabe des Lackierguts von einem auf ein anderes Transportband voraus. Um vor allem bei der Übergabe des Lackierguts von dem Transportband der elektrophoretischen Tauchlackierung auf das die nachgeschaltete, dem Einbrennofen noch vorgeordnete Spülstation durchlaufende Transportband mechanische Schädigungen zu vermeiden bzw. zu begrenzen, befindet sich bei der bekannten Durchlauf-Tauchlackieranlage zwischen dem das Tauchbad durchlaufenden Transportband und dem Transportband der Spülstation eine mit einem Wasserfilm beaufschlagte Rutsche.A continuous painting, which is behind the immersion bath u. a. a baking oven, through which the paint is conveyed on a conveyor belt that is thermally stable with respect to the baking temperatures, usually requires the transfer of the paint from one conveyor belt to another. In order to avoid or limit mechanical damage, especially when the paint is transferred from the conveyor belt of the electrophoretic dip coating to the downstream conveyor belt that passes through the baking oven upstream of the baking oven, there is between the conveyor belt and the conveyor belt that passes through the immersion bath in the known continuous dip coating system a slide loaded with a film of water on the conveyor belt of the flushing station.

Der Erfindung liegt die Aufgabe zugrunde, ein vollständiges elektrophoretisches Tauchlackieren mit verringertem maschinenbautechnischem Aufwand und ggf. auch bei einer kontinuierlichen Lackieranlage eine schonende Übergabe des Lackierguts von einem Transportband auf ein anderes zu ermöglichen.The invention has for its object to enable a complete electrophoretic dip painting with reduced mechanical engineering effort and possibly also with a continuous painting system a gentle transfer of the paint from one conveyor belt to another.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Transportband aus Erhebungen mit beisp. einer gezackten Oberfläche versehenen Lamellen besteht, die vorteilhafterweise abwechselnd gegeneinander versetzt sind, und zwar vorzugsweise derart, daß die jeweils mittlere von drei Lamellen gegenüber den beiden anderen Lamellen um ein von der Kettenteilung abweichendes Maß versetzt ist. Mit einem derartigen Lamellen-Transportband lassen sich mehrere Vorteile gleichzeitig erreichen. So wird eine vollständige, gleichmäßige Beschichtung bzw. Lackierung erreicht, da sich die Kontaktpunkte mit den Zacken der Oberfläche des Lamellen-Transportbandes verändern lassen, nämlich vorteilhaft dadurch, daß das Transportband mit einer Umlenkung in etwa der Mitte durch einen Badbehälter geführt ist. Die Gesamtauflagefläche wird verringert und die Qualität der Lackierung verbessert. Es bedarf lediglich dieser einen Umlenkung, um die Kontaktpunkte so zu verlagern, daß nun auch die bisher nicht beschichteten Steilen der Oberflächen in der zweiten Badhälfte von dem Lack umspült und damit vollständig lackiert werden. Im Umlenkbereich verschieben sich nämlich die Lamellen gegeneinander; dabei nähern sich die vorzugsweise verschieden hohen Zähne der sich zum Umkehrpunkt hin bewegenden und der sich entfernenden Abschnitte der Lamellen einander an, so daß sich auf der zweiten Hälfte des Transportweges, nämlich im Anschluß an die Umlenkung für die Teile, andere Kontaktstellen als zuvor ergeben. Der Kurvenradius der Umlenkung läßt sich durch Längenänderungen des Lamellengurtes, z.B. mittels Spanneinheiten, an jede Werkstückkontur derart anpassen, daß sich eine optimale Umlagerung der zu lackierenden Teile ergibt.This object is achieved in that the conveyor belt from surveys with ex. a serrated surface provided slats, which are advantageously alternately offset from each other, preferably such that the middle of three slats is offset from the other two slats by an amount different from the chain pitch. With such a slat conveyor belt, several advantages can be achieved simultaneously. In this way, a complete, uniform coating or painting is achieved, since the contact points with the teeth of the Allow the surface of the slat conveyor belt to be changed, namely advantageously in that the conveyor belt is guided through a bath container with a deflection approximately in the middle. The total contact area is reduced and the quality of the painting is improved. All that is needed is a redirection in order to shift the contact points in such a way that the previously uncoated parts of the surfaces in the second half of the bath are now washed by the paint and are thus completely painted. In the deflection area, the slats move against each other; the teeth of different heights of the sections of the slats moving towards the turning point and those moving away approach each other, so that on the second half of the transport path, namely following the deflection for the parts, there are different contact points than before. The radius of the curve of the deflection can be adapted to each workpiece contour by changing the length of the slat belt, for example by means of tensioning units, in such a way that an optimal rearrangement of the parts to be painted results.

Die Lamellenbauweise erlaubt es vor allem, das dem Badbehälter zugeordnete Transportband und ein die Teile übernehmendes Folgeband mit im zwischen den Kettenrädern der beiden Transportbänder liegenden Übergabebereich kammartig ineinandergreifenden Lamellen zu versehen. Bei der Übergabe braucht dann keine Höhendifferenz überwunden zu werden, was eine äußerst schonende Übergabe der Werkstücke ermöglicht. Außerdem lassen sich für eine kontinuierliche Durchlauf-Tauchlackieranlage gleichartige Transportbänder verwenden. Durch die in Längsrichtung gegeneinander versetzten, vorteilhaft auf mit den Antriebsketten verbundenen Querstäben angeordneten Lamellen ergibt sich der kammartige Eingriff im Übergabebereich zwischen den benachbarten Kettenrädern aufeinanderfolgender Tranportbänder beispielsweise dadurch, daß der Abstand zwischen den Längsachsen benachbarter Querstäbe der ein- oder mehrfachen Ketten-Teilung entspricht und die jeweils mittlere von drei Lamellen gegenüber den beiden anderen Lamellen versetzt ist. Die Lamellen besitzen dann aufgrund der sich beim Abwälzen auf den Kettenrädern, d.h. in den Umkehrpunkten einstellenden Geometrie gegenüber den Querstäben vorkragende, jeweils durch eine Lücke voneinander getrennte freie Enden. In die Lücken zwischen den freien Enden greifen die vorkragenden Enden der korrespondierend angeordneten Lamellen des folgenden Transporthandes ein, so daß sich ein kontinuierliches, kammartiges Ineinandergreifen und eine Übernahme der Teile von dem einen auf das andere Transportband ohne Fallwege ergibt.Above all, the lamella construction allows the conveyor belt assigned to the bath container and a subsequent belt to take over the parts to be provided with lamellas which intermesh with one another in the transfer area lying between the chain wheels of the two conveyor belts. No height difference then needs to be overcome during the transfer, which enables extremely gentle transfer of the workpieces. In addition, similar conveyor belts can be used for a continuous continuous immersion painting system. Due to the longitudinally offset slats, advantageously arranged on cross bars connected to the drive chains, the comb-like engagement in the transfer area between the adjacent sprockets of successive conveyor belts results, for example, from the fact that the distance between corresponds to the longitudinal axes of adjacent cross bars of the single or multiple chain pitch and the middle of three slats is offset from the other two slats. The lamellae then have free ends, each protruding from one another by a gap, due to the geometry which protrudes with respect to the crossbars during the rolling on the chain wheels, that is to say in the turning points. The projecting ends of the correspondingly arranged lamellae of the following transport hand engage in the gaps between the free ends, so that there is a continuous, comb-like intermeshing and transfer of the parts from one to the other conveyor belt without falling paths.

Wie sich in Versuchen herausgestellt hat, sollten die einander zugewandten Zahnflanken benachbarter Zähne einen rechten Winkel einschließen; je nach Werkstück läßt sich das Winkelmaß abhängig von der günstigsten Schwerpunktlage bei der Übernahme entsprechend anpassen. Dieser Effekt läßt sich auch dann erreichen, wenn zwischen den Zahnflanken Radien bzw. Kurven vorgesehen sind. Bei rollfähigen Werkstücken sorgen die Zähne des Lamellen-Transportbandes ohne weitere Maßnahmen für eine sichere Auflage auf dem Transportband.As has been found in experiments, the tooth flanks of adjacent teeth facing each other should form a right angle; Depending on the workpiece, the angular dimension can be adjusted accordingly depending on the most favorable center of gravity when taking over. This effect can also be achieved if radii or curves are provided between the tooth flanks. In the case of workpieces that can be rolled, the teeth of the slat conveyor belt ensure that they rest securely on the conveyor belt without any further measures.

Wenn vorteilhaft die, bezogen auf die Laufrichtung des Transportbandes, vordere Stabaufnahmebohrung der Lamellen als Langloch ausgebildet ist, läßt sich bei einer Querstabteilung, die größer ist als die Kettenteilung, die für die Lamellen in den Umkehrpunkten erforderliche Bewegungsfreiheit erreichen.If, based on the running direction of the conveyor belt, the front rod receiving bore of the slats is advantageously designed as an elongated hole, the freedom of movement required for the slats in the reversal points can be achieved with a crossbar division that is larger than the chain pitch.

Bei zwischen den Lamellen auf den Querstäben angeordneten Distanzhülsen, die vorzugsweise den gleichen Außendurchmesser wie die Buchsen der Antriebsketten haben sollten, ergibt sich eine seitliche Abstützung der Lamellen, die somit nicht durch die Werkstückbeaufschlagung abkippen Weiterhin bieten die Distanzbuchsen günstige Angriffspunkte für - insbesondere bei großen Gurtbreiten zweckmäßigen - axiale Unterstützungen bei Wende- und Umkehrführungen.In the case of spacer sleeves arranged on the crossbars between the lamellae, which should preferably have the same outer diameter as the bushes of the drive chains, This results in a lateral support of the slats, which therefore does not tip over due to the workpiece loading. Furthermore, the spacer bushes offer favorable points of attack for - especially useful for large belt widths - axial supports for turning and reversing guides.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels des näheren erläutert. In der Zeichnung zeigen:

Fig. 1
eine Gesamtansicht einer kontinuierlichen Durchlauf-Tauchlackierung;
Fig. 2
in der Vorderansicht als Einzelheit die Lamelle eines erfindungsgemäßen Lamellen-Transportbandes;
Fig. 3
in der Draufsicht einen Ausschnitt des erfindungsgemäßen, aus Lamellen für eine der 3-fachen Kettenteilung entsprechenden Querstabteilung bestehenden Lamellen-Transportbandes;
Fig. 4
als Einzelheit den in Fig. 1 mit Y gekennzeichneten Übergabebereich zwischen zwei Transportbändern;
Fig. 5
die Seitenansicht einer einreihigen, aus einzelnen Lamellen bestehenden Kette;
Fig. 6
eine Draufsicht auf ein aus mehreren Lamellenketten gemäß Fig. 5 bestehendes Transportband;
Fig. 7
eine Draufsicht auf ein Transportband aus Lamellenketten mit stabilisierenden Lamellen;
Fig. 8
einen axialen Längsschnitt durch ein Kettenrad;
Fig. 9
einen Vertikalschnitt durch U-förmige Kettenführungen;
Fig. 10
einen Vertikalschnitt durch eine andere Ausführung U-förmiger Kettenführungen und
Fig. 11
einen Vertikalschnitt durch kastenförmige Kettenführungen.
The invention is explained below with reference to an embodiment shown in the drawing. The drawing shows:
Fig. 1
an overall view of a continuous continuous dip coating;
Fig. 2
in the front view as a detail the slat of a slat conveyor belt according to the invention;
Fig. 3
in the plan view a section of the slat conveyor belt according to the invention, consisting of slats for a crossbar division corresponding to the triple chain pitch;
Fig. 4
as a detail the transfer area marked Y in FIG. 1 between two conveyor belts;
Fig. 5
the side view of a single-row chain consisting of individual slats;
Fig. 6
a plan view of a conveyor belt consisting of several slat chains according to FIG. 5;
Fig. 7
a plan view of a conveyor belt from slat chains with stabilizing slats;
Fig. 8
an axial longitudinal section through a sprocket;
Fig. 9
a vertical section through U-shaped chain guides;
Fig. 10
a vertical section through another version of U-shaped chain guides and
Fig. 11
a vertical section through box-shaped chain guides.

Von einer kontinuierlichen Durchlauf-Tauchlackieranlage 1 sind in Fig. 1 eine Zuführung (Zuführtisch, Zuführförderer) 2, ein Badbehälter 3 mit ihm zugeordnetem Transportband 4 sowie ein sich anschließendes, durch einen Einbrennofen 5 geführtes Transportband 6 dargestellt. Der Zuführförderer 2 bringt die schematisch angedeuteten Teile 7 in einer einlagigen Schicht auf das Transportband 4 ab, das das Lackierbad 8 im Badbehälter 3 durchläuft. Zum schlupf- und spannungsfreien Bewegen des Transportbandes 4 sind die vordere und die hintere, als Kettenräder 9 bzw. 11 ausgebildeten Antriebswalzen synchron geschaltet.A feed (feed table, feed conveyor) 2, a bath container 3 with its associated conveyor belt 4 and a subsequent conveyor belt 6 guided through a baking oven 5 are shown in FIG. 1 of a continuous continuous immersion painting system 1. The feed conveyor 2 brings the schematically indicated parts 7 in a single-layer to the conveyor belt 4, which passes through the painting bath 8 in the bath container 3. To move the conveyor belt 4 without slippage and tension, the front and rear drive rollers designed as chain wheels 9 and 11 are connected synchronously.

Die Transportbänder 4 und 6 sind in Lamellenbauweise ausgeführt; sie bestehen aus Lamellen 12, die auf mit Antriebsketten 13 verbundenen Querstäben 14 angeordnet und durch Distanzhülsen 20 voneinander getrennt sind (vgl. Fig. 3). Der Außendurchmesser der Distanzhülsen 20 ist gleich dem Außendurchmesser der Buchsen der Antriebsketten 13. Jede Lamelle 12 gemäß dem Ausführungsbeispiel weist sechs Zähne 15 auf, deren von Spitze zu Spitze gerechnete Teilung T dem Teilungsmaß der Antriebsketten 13 entspricht. Die Zähne 15 sind verschieden hoch, wie durch den in Fig. 2 dargestellten Höhenunterschied 16 deutlich wird, und die einander zugewandten Zahnflanken 17 benachbarter Zähne schließen einen rechten Winkel 18 ein. Die Lamellen 12 weisen, da die Querstabteilung größer als die Kettenteilung ist, nämlich der 3-fachen Kettenteilung entspricht, neben einer zylindrischen außerdem eine als Langloch ausgebildete Stabaufnahmebohrung 19 bzw. 21 auf. Wie sich aus Fig. 3 ergibt, sind die Lamellen 12 derart versetzt angeordnet, daß die jeweils mittlere von drei Lamellen 12a gegenüber den beiden anderen Lamellen 12b bzw. 12c in Transportrichtung 22 versetzt ist. Während der Abstand zwischen den Längsachsen 23 benachbarter Querstäbe 14 der dreifachen Ketten-Teilung T entspricht, beträgt das Versatzmaß der jeweils mittleren Lamelle 12a lediglich das 2,5-fache der Ketten- Teilung T. Die Lamellen 12b bzw. 12c enden - in Transportrichtung 22 gesehen - somit jeweils vor einem Querstab 14, und die mittleren Lamellen 12a ragen mit ihrem freien Enden über den Querstab 14 hinaus (vgl. Fig. 3).The conveyor belts 4 and 6 are designed in lamella construction; they consist of lamellae 12, which are arranged on cross bars 14 connected to drive chains 13 and are separated from one another by spacer sleeves 20 (cf. FIG. 3). The outer diameter of the spacer sleeves 20 is equal to the outer diameter of the bushes of the drive chains 13. Each lamella 12 according to the exemplary embodiment has six teeth 15, whose pitch T calculated from tip to tip corresponds to the pitch of the drive chains 13. The teeth 15 are of different heights, as is evident from the height difference 16 shown in FIG. 2, and the tooth flanks 17 facing one another are adjacent Teeth form a right angle 18. The slats 12 have, since the crossbar division is larger than the chain pitch, namely corresponds to 3 times the chain pitch, in addition to a cylindrical rod slot 19 and 21 designed as an elongated hole. As can be seen from FIG. 3, the lamellae 12 are arranged offset such that the middle of three lamellae 12a is offset in relation to the other two lamellae 12b and 12c in the transport direction 22. While the distance between the longitudinal axes 23 of adjacent cross bars 14 corresponds to the triple chain pitch T, the offset dimension of the respective middle lamella 12a is only 2.5 times the chain pitch T. The lamellae 12b and 12c end - in the transport direction 22 seen - thus in front of a cross bar 14, and the middle lamellae 12a project with their free ends beyond the cross bar 14 (cf. FIG. 3).

Aufgrund der Ablaufgeometrie an den Kettenrädern 9, 11 entstehen zwischen den fingerartig vorkragenden Enden der Lamellen 12a freie Lücken 24, die in dem in Fig. 1 mit Y gekennzeichneten Übergabebereich vom Transportband 4 auf das Transportband 6 ein schonendes, beschädigungsfreies Übergeben der Teile 7 an das nachfolgende Transportband 6 der kontinuierlichen Durchlauf-Tauchlackieranlage 1 gewährleisten. Denn das ebenfalls von Kettenrädern 25, 26 geführte und umgelenkte, wie das Transportband 4 aus Lamellen 12 bestehende Transportband 6 ist so ausgebildet, daß es mit seinen in den Umkehrpunkten über einen Querstab 14 vorkragenden Enden der Lamellen kammartig in die freien Lücken 24 des Transportbandes 4 eingreift. Bei einem Betrieb der Kettenräder 11, 26 entsprechend den in Fig. 4 eingetragenen Rotationspfeilen ergibt sich somit ein kontinuierliches Ineingriffbringen der Transportbänder 4, 6 bzw. deren Lamellen 12 zwischen den in einem entsprechenden Abstand voneinander abgeordneten Kettenrädern 11, 26 und damit eine kontinuierliche Übergabe der Werkstücke von dem ersten auf das zweite Transportband 4 bzw. 6.Due to the running geometry on the sprockets 9, 11, free gaps 24 are formed between the finger-like projecting ends of the lamellae 12a, which in the transfer area marked Y in FIG. 1 from the conveyor belt 4 to the conveyor belt 6 are gentle, damage-free transfer of the parts 7 to the Ensure the following conveyor belt 6 of the continuous continuous immersion painting system 1. This is because the conveyor belt 6, which is also guided and deflected by sprockets 25, 26, like the conveyor belt 4 consisting of lamellae 12, is designed in such a way that the ends of the lamellae projecting in the reversal points via a crossbar 14 are comb-like into the free gaps 24 of the conveyor belt 4th intervenes. When the sprockets 11, 26 are operated in accordance with the rotation arrows shown in FIG. 4, this results in a continuous engagement of the conveyor belts 4, 6 or their lamellae 12 between the ones spaced apart from one another by a corresponding distance Sprockets 11, 26 and thus a continuous transfer of the workpieces from the first to the second conveyor belt 4 or 6.

Um eine Veränderung der Kontaktstellen zwischen den Zähnen 15 und den Teilen 7 während des Durchlaufens des Badbehälters 3 zu erreichen, befindet sich etwa in der Mitte des Badbehälters eine in Fig. 1 schematisch angedeutete Umlenkung 27. Das von den Antriebsketten 13 beidseitig geführte Transportband 4 läuft zu diesem Zweck zunächst geneigt in den Badbehälter 3 ein, und zwar bis es die Umlenkung 27 (Wendepunkt) erreicht hat; von dort steigt es dann mit einem der vorherigen Neigung entsprechenden Winkel an, so daß es schließlich wieder aus dem Lackierbad austritt und zum Übergabebereich Y gelangt. Beim Passieren der Umlenkung nähern sich die Zähne der geneigt einlaufenden und der schräg ansteigenden Lamellen 12 des Transportbandes 4 einander an, was gleichbedeutend mit einer Umlagerung der Teile 7 ist, so daß die bisherigen Kontakstellen danach ungehindert und vollständig von dem Lack umspült werden können.In order to achieve a change in the contact points between the teeth 15 and the parts 7 during the passage of the bath container 3, a deflection 27 indicated schematically in FIG. 1 is located approximately in the middle of the bath container. The conveyor belt 4 guided on both sides by the drive chains 13 runs for this purpose, first inclined into the bath container 3, namely until it has reached the deflection 27 (turning point); from there it then rises at an angle corresponding to the previous inclination, so that it finally exits the paint bath and reaches the transfer area Y. When passing the deflection, the teeth of the inclined and the inclined slats 12 of the conveyor belt 4 approach each other, which is equivalent to a rearrangement of the parts 7, so that the previous contact points can then be completely and freely washed by the paint.

Der sich aufgrund der Neigungen des ein- und des auslaufenden Transportbandes 4 in der Umlenkung 27 einstellende Umlenkradius läßt sich durch Spannen oder Entspannen des Bandes verändern, so daß sich eine optimale Umlagerung der Teile bzw. Veränderung der Kontaktstellen ergibt. Das aus Lamellen 12 bestehende Transportband 4 ermöglicht somit nicht nur eine sich selbsttätig verändernde Lage des Lackierguts auf dem Transportband und damit eine freie Zugänglichkeit der gesamten Oberfläche während des Durchlaufens des Badbehälters 3, sondern außerdem in Kombination mit einem gleichartigen, d.h. ebenfalls aus Lamellen 12 bestehenden, sich anschließenden Transportband 6 eine schonende, die vollständig vom Lack benetzte Oberfläche nicht beschädigende Übergabe von dem einen auf das andere Transportband.The deflection radius which is set in the deflection 27 on account of the inclinations of the incoming and outgoing conveyor belt 4 can be changed by tensioning or relaxing the belt, so that there is an optimal rearrangement of the parts or a change in the contact points. The conveyor belt 4 consisting of slats 12 thus not only enables an automatically changing position of the paint on the conveyor belt and thus free access to the entire surface while passing through the bath container 3, but also in combination with a similar, ie also consisting of slats 12 , subsequent conveyor belt 6 a gentle transfer from one surface to the other, which does not damage the surface completely wetted by the paint Conveyor belt.

Wie sich aus den Darstellungen in den Fig. 5 bis 11 ergibt, kann das Transportband auch aus einzelnen, gelenkig miteinander zu einreihigen Ketten 28 miteinander verbundenen Lamellen 29 bestehen. Dabei sind entsprechend der Darstellung in Fig. 6 jeweils zwei Lamellen 29 mittels eines Niets bzw. Metallbolzens 30 miteinander verbunden. Mehrerer solcher, parallel zueinander angeordneter Lamellenketten bilden dann ein Transportband mit verhältnismäßig kleiner Masse und einem großen Öffnungsquerschnitt.As can be seen from the illustrations in FIGS. 5 to 11, the conveyor belt can also consist of individual slats 29 which are connected to one another in an articulated manner to form single-row chains 28. 6, two lamellae 29 are connected to each other by means of a rivet or metal bolt 30. Several such slat chains arranged parallel to each other then form a conveyor belt with a relatively small mass and a large opening cross section.

Um bei einer Zugbelastung auftretende Kippmomemte aufzulangen, können entsprechend der zeichnerischen Darstellung in Fig. 7 auch parallel zu einzelnen Lamellen 29 einer Lamellenkette 28 stabilisierende Lamellen 31 angeordnet sein. Zweckmäßigerweise wechseln dann - wie in Fig. 7 dargestellt - Einzellamellen 29 und Lamellenpaare 29, 31 einander ab.In order to compensate for tilting moments occurring under a tensile load, stabilizing slats 31 can also be arranged parallel to individual slats 29 of a slat chain 28, as shown in the drawing in FIG. 7. Expediently then - as shown in Fig. 7 - single lamella 29 and lamella pairs 29, 31 alternate.

Zum Führen und Umlenken der Lamellenketten 28 dienen walzenförmige Kettenräder 32, die mit Umfanschlitzen 33 zum Führen der Lamellenketten 28 und Nietkopfaufnahmen 34 versehen sind. Diese Kettenräder können einstückig ausgebildet sein oder aus einzelnen, nebeneinander angeordneten, Umfangsschlitze 33 bildenden Scheiben bestehen.Roller-shaped chain wheels 32, which are provided with peripheral slots 33 for guiding the plate chains 28 and rivet head receptacles 34, serve to guide and deflect the plate chains 28. These chain wheels can be formed in one piece or consist of individual disks which are arranged next to one another and form circumferential slots 33.

Unabhängig davon können die Lamellenketten 28 aber auch in U-Profilen 35 geführt sein, die ihrerseits aus jeweils zwei durch Niete 36 miteinander verbundenen Lamellen 37, 38 bestehen (Fig. 9). Andererseits können die U-förmigen Führungen 35 aber auch aus mehreren nebeneinander angeordneten einstückigen U-Profilen 39 bestehen (Fig. 10). Eine besonders sichere Führung ergibt sich dann, wenn die Lamellenketten 28 in kastenförmigen Führungen 40 mit einem oberen Schlitz 41 und wahlweise susätzlich einem unteren Schlitz 42 geführt sind. Derartige Führungen können jeweils aus zwei U-Profilen 43, 44 bestehen.Irrespective of this, the lamella chains 28 can also be guided in U-profiles 35, which in turn consist of two lamellae 37, 38 each connected by rivets 36 (FIG. 9). On the other hand, the U-shaped guides 35 can also consist of a plurality of one-piece U-profiles 39 arranged next to one another (FIG. 10). A particularly secure guidance is obtained if the lamella chains 28 in box-shaped guides 40 with an upper slot 41 and optionally additionally a lower slot 42 are guided. Such guides can each consist of two U-profiles 43, 44.

Der besondere Vorteil von aus mehreren parallel geführten Lamellenketten bestehenden Transportbändern ergibt sich daraus, daß die einzelnen Lamellenketten zweier benachbarter Transportbänder im Bereich ihrer Stoßstelle kammartig ineinander greifen und wegen des Fehlens von die Lamellen verbindenden Querstäben eine besonders große Überlastungszone bilden. Dies erlaubt einen problemlosen Übergang des Transport- bzw. Lackierguts.The particular advantage of conveyor belts consisting of several parallel slat chains results from the fact that the individual slat chains of two adjacent conveyor belts intermesh in the area of their joint and form a particularly large overload zone due to the lack of cross bars connecting the slats. This allows a smooth transition of the goods to be transported or painted.

Claims (19)

Vorrichtung zum elektrophoretischen Tauchlackieren mit - einem Transportband (4) - aus mit Erhebungen versehenen Lamellen (12). Device for electrophoretic dip painting with - a conveyor belt (4) - From lamellae provided with elevations (12). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Lamellen (12) wechselweise gegeneinander versetzt sind.Device according to claim 1, characterized in that the lamellae (12) are mutually offset. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß eine Lamelle (12a) gegenüber zwei benachbarten Lamellen (12b, 12c) um ein von der Kettenteilung (T) abweichendes Maß versetzt ist.Apparatus according to claim 2, characterized in that a lamella (12a) is offset by an amount different from the chain pitch (T) compared to two adjacent lamellae (12b, 12c). Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Lamellen (12) verschieden hohe Erhebungen (15) aufweisen.Device according to one of claims 1 to 3, characterized in that the lamellae (12) have elevations (15) of different heights. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die einander zugewandten Zahnflanken (17) benachbarter Erhebungen (15) einen rechten Winkel (18) einschließen.Device according to claim 4, characterized in that the mutually facing tooth flanks (17) of adjacent elevations (15) enclose a right angle (18). Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Transportband (4) mit einer Umlenkung (27) durch einen Badbehälter (3) geführt ist.Device according to one of claims 1 to 5, characterized in that the conveyor belt (4) is guided with a deflection (27) through a bath container (3). Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das dem Badbehälter (3) zugeordnete Transportband (4) und ein Folgeband (6) im zwischen den Kettenrädern (11, 25) der beiden Bänder gelegenen Übergabeberelch (Y) mit kammartig ineinandergreifenden Lamellen (12) versehen sind.Device according to one of claims 1 to 6, characterized in that the conveyor belt (4) assigned to the bath container (3) and a subsequent belt (6) in the transfer area (Y) located between the chain wheels (11, 25) of the two belts intermesh with a comb Slats (12) are provided. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Lamellen (12) mit einem Langloch (21) versehen sind.Device according to one of claims 1 to 7, characterized in that the lamellae (12) are provided with an elongated hole (21). Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Lamellen (12) auf mit den Antriebsketten (13) verbundenen Querstäben (14) angeordnet sind.Device according to one of claims 1 to 8, characterized in that the lamellae (12) are arranged on cross bars (14) connected to the drive chains (13). Vorrichtung nach Anspruch 9, gekennzeichnet durch zwischen den Lamellen (12) auf den Querstäben (14) angeordnete Distanzhülsen (20).Apparatus according to claim 9, characterized by spacer sleeves (20) arranged between the lamellae (12) on the cross bars (14). Vorrichtung nach Anspruch 10, gekennzeichnet durch gleiche Außendurchmesser der Distanzhülsen (20) und der Buchsen der Antriebsketten (13).Apparatus according to claim 10, characterized by the same outer diameter of the spacer sleeves (20) and the bushes of the drive chains (13). Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das Transportband aus einzelnen, gelenklg miteinander zu einreihigen Ketten (28) miteinander verbundenen Lamellen (29) besteht.Apparatus according to one of Claims 1 to 8, characterized in that the conveyor belt consists of individual lamellae (29) which are connected to one another to form single-row chains (28). Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, daß jeweils zwei Lamellen (29) mittels eines Niets (30) miteinander verbunden sind.Device according to claim 12, characterized in that two lamellae (29) are connected to each other by means of a rivet (30). Vorrichtung nach Anspruch 12 oder 13, dadurch gekennzeichnet, daß parallel zu einzelnen Lamellen (29) der Kette (28) eine stabilisierende Lamelle (31) angeordnet ist.Apparatus according to claim 12 or 13, characterized in that the parallel to individual lamellae (29) Chain (28) a stabilizing plate (31) is arranged. Vorrichtung nach einem der Ansprüche 12 bis 14, dadurch gekennzeichnet, daß die Lamellenketten (28) teilweise in einem U-Profil (35, 39) geführt sind.Device according to one of claims 12 to 14, characterized in that the lamella chains (28) are partially guided in a U-profile (35, 39). Vorrichtung nach einem der Ansprüche 12 bis 14, dadurch gekennzeichnet, daß die Lamellenketten (28) in einem geschlitzten Kastenprofil (40) geführt sind.Device according to one of claims 12 to 14, characterized in that the lamella chains (28) are guided in a slotted box profile (40). Vorrichtung nach einem der Ansprüche 12 bis 16, gekennzeichnet durch mit Führungsschlitzen (33) versehene Kettenräder (32).Device according to one of claims 12 to 16, characterized by chain wheels (32) provided with guide slots (33). Vorrichtung nach Anspruch 17 dadurch gekennzeichnet, daß die Kettenräder (32) aus einzelnen nebeneinander angeordneten, Umfangsschlitze (33) bildenden Scheiben bestehen.Device according to Claim 17, characterized in that the chain wheels (32) consist of individual disks which are arranged next to one another and form peripheral slots (33). Vorrichtung nach Anspruch 17 oder 18, dadurch gekennzeichnet, daß die Kettenräder (32) mit peripheren Nietkopfaufnahmen (34) versehen sind.Device according to claim 17 or 18, characterized in that the chain wheels (32) are provided with peripheral Nietkopfaufnahmen (34).
EP92121813A 1991-12-24 1992-12-22 Apparatus for electrophoretic painting Expired - Lifetime EP0550000B1 (en)

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DE4142997 1991-12-24

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AT (1) ATE136952T1 (en)
CZ (1) CZ293075B6 (en)
DE (3) DE4142997C1 (en)
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CN100494020C (en) * 2006-03-07 2009-06-03 江苏天奇物流系统工程股份有限公司 Rotary immersion type conveying machine system
US7767070B2 (en) 2004-08-13 2010-08-03 Ppg Industries Ohio, Inc. Processes for coating of objects
CN109137019A (en) * 2018-08-14 2019-01-04 歌尔股份有限公司 A kind of continuous platingization method

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DE4428789B4 (en) * 1993-11-23 2007-07-26 Nütro Maschinen- und Anlagenbau GmbH & Co. KG Device for dip coating
DE4339773C2 (en) * 1993-11-23 2001-12-13 Nuetro Maschinen & Anlagen Method and device for dip painting
DE4341188C2 (en) * 1993-12-03 1998-07-09 Nuetro Maschinen & Anlagen Device and method for electrocoating
DE19511900C2 (en) * 1995-03-31 1997-04-24 Hentschel Michael Dipl Ing Fh Device for electro-dip painting
DE19713203C1 (en) * 1997-03-28 1998-11-12 Nuetro Maschinen & Anlagen Device and method for surface treatment by dipping
DE19834245B4 (en) * 1998-07-29 2007-05-03 Nütro Maschinen- und Anlagenbau GmbH & Co. KG Device for electrolytic coating

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7767070B2 (en) 2004-08-13 2010-08-03 Ppg Industries Ohio, Inc. Processes for coating of objects
CN100494020C (en) * 2006-03-07 2009-06-03 江苏天奇物流系统工程股份有限公司 Rotary immersion type conveying machine system
CN109137019A (en) * 2018-08-14 2019-01-04 歌尔股份有限公司 A kind of continuous platingization method

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HU9204103D0 (en) 1993-04-28
CZ373792A3 (en) 1993-08-11
DE4142997C1 (en) 1993-01-28
SK373792A3 (en) 1995-03-08
CZ293075B6 (en) 2004-02-18
ES2086058T3 (en) 1996-06-16
DK0550000T3 (en) 1996-05-13
PL169788B1 (en) 1996-08-30
DE9116171U1 (en) 1992-04-02
ATE136952T1 (en) 1996-05-15
PL297096A1 (en) 1993-07-12
SK278817B6 (en) 1998-03-04
EP0550000B1 (en) 1996-04-17
HU219274B (en) 2001-03-28
DE59206046D1 (en) 1996-05-23
HUH3785A (en) 1996-07-29

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