EP1837084A2 - Device for spray coating workpieces - Google Patents

Device for spray coating workpieces Download PDF

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Publication number
EP1837084A2
EP1837084A2 EP07004727A EP07004727A EP1837084A2 EP 1837084 A2 EP1837084 A2 EP 1837084A2 EP 07004727 A EP07004727 A EP 07004727A EP 07004727 A EP07004727 A EP 07004727A EP 1837084 A2 EP1837084 A2 EP 1837084A2
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EP
European Patent Office
Prior art keywords
spray
injection units
injection
nozzles
coating
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
Application number
EP07004727A
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German (de)
French (fr)
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EP1837084A3 (en
EP1837084B1 (en
Inventor
Rudolf Ledvina
Michael Rödder
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Intec Lackiersysteme GmbH
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Intec Lackiersysteme GmbH
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Publication of EP1837084A2 publication Critical patent/EP1837084A2/en
Publication of EP1837084A3 publication Critical patent/EP1837084A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0463—Installation or apparatus for applying liquid or other fluent material to moving work of indefinite length
    • B05B13/0468—Installation or apparatus for applying liquid or other fluent material to moving work of indefinite length with reciprocating or oscillating spray heads
    • B05B13/0473—Installation or apparatus for applying liquid or other fluent material to moving work of indefinite length with reciprocating or oscillating spray heads with spray heads reciprocating along a straight line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0463—Installation or apparatus for applying liquid or other fluent material to moving work of indefinite length
    • B05B13/0494—Installation or apparatus for applying liquid or other fluent material to moving work of indefinite length with spray heads being moved along a closed path
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work

Definitions

  • the invention relates to a device for spray coating of workpieces, in particular of metal components such as sheets, which are transported over a conveyor line and thereby coated by moving transversely to this conveyor line spray nozzles, the two or more separate, each equipped with at least one spray back and forth are arranged movable syringe units.
  • a spray coating apparatus is described, which is suitable for both sides spray coating, in particular with paints, of elongated workpieces such as sheets, profile bar and / or the like.
  • This device has a spray chamber, in which a head side provided, working with downwardly directed spray jet paint spray gun and a bottom side working with upwardly directed spray jet paint spray gun are arranged.
  • a Zubring conveyor line is provided below the downwardly directed spray gun, which is formed by individual conveyor rollers.
  • the opposite of the conveyor line arranged spray gun is located behind the last seen in the conveying direction conveyor roller.
  • a sheet is painted on the top and bottom sides of the conveyor line during transport.
  • an eccentrically mounted support roller is provided, which should raise the workpiece at its front longitudinal edge from the lowered position again at the level of the transfer point to an endless conveyor.
  • the spray nozzles are aligned vertically to the conveyor line.
  • both workpiece-specific and procedural tasks are to be solved in coating processes and the equipment required for this purpose.
  • the workpiece itself should be coated as uniformly as possible, in particular free of defects, which faces the desire for the greatest possible throughput speed in order to minimize the coating costs.
  • the introduced into the coating device workpieces are already pretreated, z. B. by blasting process to eliminate the skin on sheets.
  • the scale-free and dust-free delivered workpieces can reach throughput speeds of 4 to 6 m / min.
  • spray lugs In order to ensure a sufficient surface coating during such pass speeds, spray lugs must be generated by nozzles according to the angular size and the nozzles are passed over the workpiece with a sufficiently large transverse velocity. Limits of the nozzle running speeds are approximately in the range of 1.2 to 1.4 m / s, since at higher injection speeds, the spray lug too inhomogeneous and thus the coating is too uneven.
  • Machining objects are in particular sheets whose thickness can be between 4 and 160 mm for lengths of 2.5 m to 24 m and widths of 1.5 m to 4.5 m.
  • sheets whose thickness can be between 4 and 160 mm for lengths of 2.5 m to 24 m and widths of 1.5 m to 4.5 m.
  • For thin sheets work with a correspondingly good support, which counteracts the deflection.
  • a plurality of spray nozzles are arranged on a transversely movable to the conveying direction of the workpiece traverse nozzles, which can be divided into two groups, of which a first group by 45 ° to one direction and the other group by 45 ° the other direction is inclined.
  • the first group of nozzles spray, whereas on the way back the traverse sprays the second group of nozzles.
  • Problematic with this alternating spray processing are the respective transition times or connection areas when changing the spray treatment of the first group of nozzles to the second group of nozzles.
  • this device has on a coating side of the metal component two injection units, which are simultaneously guided in a single common plane of movement so that they pass through a closed path, wherein carried out in one direction of motion spray coatings and on the way back the injection units, preferably at a higher speed, can be guided past the other injection unit.
  • the described device initially results in that the nozzles of two separate injection units each only in one direction of movement, for. B. on the way, inject, however, are parked on the way back. As a result, the coating result is uniform. Achievable conveying speeds can be 10 m / min and more.
  • the return path is traversed faster, so that the spraying device can be positioned exactly before resuming the injection process in a further zone of the conveyed workpiece.
  • the common plane of movement is vertical to the conveying direction, ie in a horizontal conveying direction, the injection units are moved on the way in spraying near the workpiece, then raised or lowered and on the Way back to the other injection unit, which has now taken up the spraying activity, led past.
  • the device according to the invention can be designed so that each two injection units are arranged on opposite sides of the conveyor line, which are guided in the manner described above.
  • the existing injection units are driven by two motors, the different running speeds are realized by frequency converter.
  • the attached to the injection unit nozzles are inclined at an angle of 30 ° to 60 °, in particular 45 ° to the direction of movement, which has the advantage that vertically standing surface pieces are equally achieved as horizontal workpiece surfaces during spraying. Since only spraying in one direction of movement, all the nozzles are inclined in the same direction, optionally an inclination adjustment of the nozzles can be provided.
  • the injection device according to the invention is arranged in a cabin which has openings for the supply and removal of the workpiece parts.
  • roller conveyors are provided for the conveyance of the workpiece parts and for the conveyance belt endless conveyors.
  • the relative position of the injection units to the coating material on an existing measuring device detectable and the distance of the injection units to the coating material controlled or regulated. In this way, the same optimum coating distance is always to be ensured.
  • the spray coating device has a total of four injection units 10, 11, 12 and 13, of which two injection units 10, 11 are arranged above a sheet 14 to be coated and two injection units 12, 13 below the sheet 14 to be painted.
  • Each of the injection units 10 to 13 has in the illustrated embodiment, two nozzles 15, 16, which are supplied with supply means not shown in detail with a coating agent.
  • the injection units 10 to 13 are, as indicated by arrows 17 to 20, back and forth in the leaf level, further, as shown in FIGS. 1 and 2, adjustable in height.
  • the injection units 10 and 12 are in their starting position, ie next possible and with a set distance to be sprayed workpiece (plate 14).
  • the injection units 10 and 12 are guided from left to right (corresponding to the illustration in FIG. 1).
  • the sheet 14 is uniformly painted from above and below.
  • the sheet is transported further in a direction perpendicular to the plane of the drawing, with the sheet advancing speed being about 3 to 10 m / min, while the speed of movement of the injection units is 1 m / s or less during painting.
  • the injection unit 11 is raised or the injection unit 13 is lowered and transported in each case greater distance from the plate 14 with a higher recirculation rate of, for example, 1.5 m / s to the starting position (left in Fig. 1 at the edge of the sheet), after which the injection units are lowered or raised again in the direction of the sheet 14.
  • the distance to the To be painted workpiece is determined by means of measuring devices and kept constant during painting.
  • the injection units 10, 11 and 12, 13 are all in a single plane, which is perpendicular to the conveying plane and cross-sectional plane of the sheet (14).
  • the injection units 10 and 11 are guided on a closed, approximately rectangular path, which describes a plane which is perpendicular to the workpiece plane.
  • the spray cones are referred to, which are formed during spray coating.
  • each spraying device has so many juxtaposed nozzles that a predetermined correspondingly large strip of the workpiece to be coated is detected.
  • the feed rate of the workpiece 14, the spray cone and the detected spray width and the feed rate of the injection units 10 to 13 are coordinated.
  • the sheet 14 is painted only at a feed direction of the nozzles 15 and 16, which is why all the nozzles are inclined in the same direction.
  • a significantly higher feed rate is selected, which can be up to twice as large as the feed rate.

Landscapes

  • Spray Control Apparatus (AREA)

Abstract

The device has spray nozzles (15, 16) provided for coating workpieces and moved transverse to a conveying path, where the workpieces are transported over the conveying path. The spray nozzles are arranged at spray units (10, 11, 12, 13), where the spray nozzles are guided in a common movement plane, such that the spray nozzles pass through a closed path. The spray units with high speed are directed to another spray unit, where the movement plane lies vertical to the conveying direction.

Description

Die Erfindung betrifft eine Vorrichtung zur Spritzbeschichtung von Werkstücken, insbesondere von Metallbauteilen wie Blechen, die über eine Förderstrecke transportiert und hierbei durch quer zu dieser Förderstrecke bewegte Spritzdüsen beschichtet werden, die an zwei oder mehr separaten, jeweils mit mindestens einer Spritzdüse ausgestatteten, hin- und herbewegbaren Spritzeinheiten angeordnet sind.The invention relates to a device for spray coating of workpieces, in particular of metal components such as sheets, which are transported over a conveyor line and thereby coated by moving transversely to this conveyor line spray nozzles, the two or more separate, each equipped with at least one spray back and forth are arranged movable syringe units.

Bereits in der DE 23 23 572 wird eine Spritzbeschichtungsvorrichtung beschrieben, die zum beiderseitigen Spritzbeschichten, insbesondere mit Lacken, von langgestreckten Werkstücke wie beispielsweise Blechen, Profilstange und/oder dergleichen geeignet ist. Diese Vorrichtung weist eine Spritzkammer auf, in der eine kopfseitig vorgesehene, mit nach unten gerichtetem Sprühstrahl arbeitende Farbspritzpistole und eine bodenseitig mit nach oben gerichtetem Sprühstrahl arbeitende Farbspritzpistole angeordnet sind. Unterhalb der nach unten gerichteten Spritzpistole ist eine Zubring-Förderstrecke vorgesehen, die von einzelnen Förderwalzen gebildet wird. Die gegenüberliegend der Förderstrecke angeordnete Farbspritzpistole ist hinter der in Förderrichtung gesehen letzten Förderwalze angeordnet. Über die Förderstrecke wird ein Blech beim Transport ober- und unterseitig lackiert. Um ein aufgrund der geringen Blechstärke zu befürchtendes Absenken des frei schwebenden Werkstückendes zu vermeiden, ist eine exzentrisch gelagerte Stützwalze vorgesehen, die das Werkstück an seiner vorderen Längskante aus der abgesenkten Stellung wieder etwa in Höhe der Übernahmestelle zu einem Endlosförderer anheben soll. Die Spritzdüsen sind vertikal zur Förderstrecke ausgerichtet.Already in the DE 23 23 572 a spray coating apparatus is described, which is suitable for both sides spray coating, in particular with paints, of elongated workpieces such as sheets, profile bar and / or the like. This device has a spray chamber, in which a head side provided, working with downwardly directed spray jet paint spray gun and a bottom side working with upwardly directed spray jet paint spray gun are arranged. Below the downwardly directed spray gun a Zubring conveyor line is provided, which is formed by individual conveyor rollers. The opposite of the conveyor line arranged spray gun is located behind the last seen in the conveying direction conveyor roller. A sheet is painted on the top and bottom sides of the conveyor line during transport. In order to avoid a feared due to the small plate thickness lowering the free-floating workpiece end, an eccentrically mounted support roller is provided, which should raise the workpiece at its front longitudinal edge from the lowered position again at the level of the transfer point to an endless conveyor. The spray nozzles are aligned vertically to the conveyor line.

Um ein manuelles Nachspritzen an solchen Werkstück-Teilbereichen zu verhindern, die vertikal zur Transportebene bzw. parallel zur Spritzdüsenrichtung ausgerichtet sind, wird in der DE 34 20 633 A1 vorgeschlagen, zusätzlich weitere Spritzpistolen schrägwinklig vorzusehen. Eine schrägwinklige Anordnung der Spritzdüsen ist insbesondere bei der Beschichtung von T- oder I-Trägern anwendbar.In order to prevent a manual overspray on such workpiece portions, which are aligned vertically to the transport plane or parallel to the spray nozzle direction, is in the DE 34 20 633 A1 proposed to additionally provide additional spray guns at an angle. An oblique arrangement of the spray nozzles is particularly applicable in the coating of T or I-beams.

Generell sind bei Beschichtungsverfahren und den hierzu notwendigen Anlagen sowohl werkstückspezifische als auch verfahrenstechnische Aufgaben zu lösen. Das Werkstück selbst soll möglichst gleichmäßig, insbesondere fehlerfrei beschichtet werden, dem der Wunsch nach einer größtmöglichen Durchlaufgeschwindigkeit gegenüber steht, um die Beschichtungskosten zu minimieren. Die in die Beschichtungsvorrichtung eingeführten Werkstücke sind bereits vorbehandelt, z. B. durch Strahlverfahren, um die Walzhaut bei Blechen zu beseitigen. Die zunder- und staubfrei angelieferten Werkstücke können Durchlaufgeschwindigkeiten von 4 bis 6 m/min erreichen. Um eine hinreichende Oberflächenbeschichtung während solcher Durchlaufgeschwindigkeiten gewährleisten zu können, müssen entsprechend der Winkelgröße Spritzfahnen durch Düsen erzeugt und die Düsen mit einer ausreichend großen Quergeschwindigkeit über das Werkstück geführt werden. Grenzen der Düsen-Laufgeschwindigkeiten liegen etwa im Bereich von 1,2 bis 1,4 m/s, da bei höheren Spritzgeschwindigkeiten die Spritzfahne zu inhomogen und damit die Beschichtung zu ungleichmäßig wird.In general, both workpiece-specific and procedural tasks are to be solved in coating processes and the equipment required for this purpose. The workpiece itself should be coated as uniformly as possible, in particular free of defects, which faces the desire for the greatest possible throughput speed in order to minimize the coating costs. The introduced into the coating device workpieces are already pretreated, z. B. by blasting process to eliminate the skin on sheets. The scale-free and dust-free delivered workpieces can reach throughput speeds of 4 to 6 m / min. In order to ensure a sufficient surface coating during such pass speeds, spray lugs must be generated by nozzles according to the angular size and the nozzles are passed over the workpiece with a sufficiently large transverse velocity. Limits of the nozzle running speeds are approximately in the range of 1.2 to 1.4 m / s, since at higher injection speeds, the spray lug too inhomogeneous and thus the coating is too uneven.

Um den Wirkungsgrad zu erhöhen wird zudem mit Spritzeinheiten gearbeitet, die mehrere nebeneinander liegende Düsen tragen. Die Anzahl der Düsen wird durch die Spritzgeometrie sowie die Abstände der Rollen einzelner Rollgänge bestimmt.In order to increase the efficiency is also working with injection units that carry several adjacent nozzles. The number of nozzles is determined by the injection geometry and the distances between the rollers of individual roller tables.

Bearbeitungsobjekte sind insbesondere Bleche, deren Dicke zwischen 4 und 160 mm bei Längen von 2,5 m bis 24 m und Breiten von 1,5 m bis 4,5 m liegen kann. Bei dünnen Blechen ist selbstverständlich mit einer entsprechend guten Unterstützung zu arbeiten, welche der Durchbiegung entgegenwirkt.Machining objects are in particular sheets whose thickness can be between 4 and 160 mm for lengths of 2.5 m to 24 m and widths of 1.5 m to 4.5 m. For thin sheets, of course, work with a correspondingly good support, which counteracts the deflection.

Bei nach dem Stand der Technik bekannten Vorrichtungen sind an einer quer zur Förderrichtung des Werkstückes bewegbaren Traverse mehrere Spritzdüsen angeordnet, die sich in zwei Gruppen aufteilen lassen, von denen eine erste Gruppe um 45° nach der einen Richtung und die andere Gruppe um 45° nach der anderen Richtung geneigt ist. Auf dem Hinweg, den die Traverse bei Überquerung des geförderten Bleches zurücklegt, sprüht die erste Gruppe der Düsen, wohingegen auf dem Rückweg der Traverse die zweite Gruppe der Düsen sprüht. Problematisch bei dieser alternierenden Sprühbearbeitung sind die jeweiligen Übergangszeiten bzw. Anschlussbereiche beim Wechsel der Sprühbearbeitung von der ersten Gruppe der Düsen auf die zweite Gruppe der Düsen. Um ein gleichmäßiges Sprühbild bzw. eine homogene Beschichtung auf dem Werkstück zu erzeugen, muss entweder mit einer verringerten Fördergeschwindigkeit oder unter hohem steuerungstechnischem Aufwand, mit dem die Relativgeschwindigkeit des Beschichtungsgutes an die Ungleichmäßigkeit beim "Düsenwechsel" ausgeglichen wird, gearbeitet werden.In devices known from the prior art, a plurality of spray nozzles are arranged on a transversely movable to the conveying direction of the workpiece traverse nozzles, which can be divided into two groups, of which a first group by 45 ° to one direction and the other group by 45 ° the other direction is inclined. On the way the traverse travels as it traverses the conveyed sheet, the first group of nozzles spray, whereas on the way back the traverse sprays the second group of nozzles. Problematic with this alternating spray processing are the respective transition times or connection areas when changing the spray treatment of the first group of nozzles to the second group of nozzles. In order to produce a uniform spray pattern or a homogeneous coating on the workpiece, work must be carried out either with a reduced conveying speed or with high control engineering effort, with which the relative speed of the coating material to the unevenness in the "nozzle change" is compensated.

Es ist Aufgabe der vorliegenden Erfindung, eine Vorrichtung zu schaffen, bei der mit einfachen Hilfsmitteln ohne hohen steuerungstechnischen Aufwand eine optimale Spritzbeschichtung von Werkstücken bei hohen Fördergeschwindigkeiten, vorzugsweise ≥6m/min oder mehr, erzielt wird.It is an object of the present invention to provide a device in which with simple tools without high control engineering effort optimum spray coating of workpieces at high conveying speeds, preferably ≥6m / min or more, is achieved.

Diese Aufgabe löst die Vorrichtung nach Anspruch 1. Erfindungsgemäß besitzt diese Vorrichtung auf einer Beschichtungsseite des Metallbauteiles zwei Spritzeinheiten, die gleichzeitig in einer einzigen gemeinsamen Bewegungsebene so geführt werden, dass sie eine geschlossene Bahn durchlaufen, wobei nur in einer Bewegungsrichtung Spritzbeschichtungen durchgeführt und auf dem Rückweg die Spritzeinheiten, vorzugsweise mit höherer Geschwindigkeit, an der anderen Spritzeinheit vorbeiführbar sind. Durch die beschriebene Vorrichtung ergibt sich zunächst, dass die Düsen von zwei getrennten Spritzeinheiten jeweils nur bei einer Bewegungsrichtung, z. B. auf dem Hinweg, spritzen, hingegen auf dem Rückweg abgestellt sind. Hierdurch wird das Beschichtungsergebnis gleichmäßiger. Erreichbare Fördergeschwindigkeiten können bei 10 m/min und mehr liegen.This object is achieved by the device according to claim 1. According to the invention, this device has on a coating side of the metal component two injection units, which are simultaneously guided in a single common plane of movement so that they pass through a closed path, wherein carried out in one direction of motion spray coatings and on the way back the injection units, preferably at a higher speed, can be guided past the other injection unit. The described device initially results in that the nozzles of two separate injection units each only in one direction of movement, for. B. on the way, inject, however, are parked on the way back. As a result, the coating result is uniform. Achievable conveying speeds can be 10 m / min and more.

Zudem ist es möglich, dass der Rückweg schneller durchlaufen wird, so dass die Spritzeinrichtung vor Wiederaufnahme des Spritzvorganges in einer weiteren Zone des geförderten Werkstückes exakt positionierbar ist. Vorzugsweise liegt die gemeinsame Bewegungsebene vertikal zur Förderrichtung, d. h. bei einer horizontalen Förderrichtung werden die Spritzeinheiten auf dem Hinweg in Sprühtätigkeit nahe dem Werkstück bewegt, anschließend angehoben bzw. abgesenkt und auf dem Rückweg an der anderen Spritzeinheit, die inzwischen die Sprühtätigkeit aufgenommen hat, vorbei geführt.In addition, it is possible that the return path is traversed faster, so that the spraying device can be positioned exactly before resuming the injection process in a further zone of the conveyed workpiece. Preferably, the common plane of movement is vertical to the conveying direction, ie in a horizontal conveying direction, the injection units are moved on the way in spraying near the workpiece, then raised or lowered and on the Way back to the other injection unit, which has now taken up the spraying activity, led past.

Sofern Werkstücke sowohl an der Ober- als auch an der Unterseite beschichtet werden müssen, kann die erfindungsgemäße Vorrichtung so ausgestaltet sein, dass je zwei Spritzeinheiten auf gegenüberliegenden Seiten der Förderstrecke angeordnet sind, die in der vorbeschriebenen Art und Weise geführt werden.If workpieces must be coated on both the top and on the bottom, the device according to the invention can be designed so that each two injection units are arranged on opposite sides of the conveyor line, which are guided in the manner described above.

Aus eingangs genannten Gründen ist es empfehlenswert, die Spritzeinheiten mit Geschwindigkeiten von maximal 1,4 m/s, vorzugsweise ≤1 m/s zur Spritzbeschichtung zu bewegen, wohingegen auf dem Rückweg Laufgeschwindigkeiten von 1,5 m/s und mehr möglich sind.For reasons mentioned above, it is recommended that the injection units with velocities of a maximum of 1.4 m / s, preferably ≤1 m / s for spray coating to move, whereas on the way back velocities of 1.5 m / s and more are possible.

Aus konstruktiven Gründen werden die vorhandenen Spritzeinheiten über zwei Motoren angetrieben, wobei die unterschiedlichen Laufgeschwindigkeiten durch Frequenzumrichter realisiert werden.For design reasons, the existing injection units are driven by two motors, the different running speeds are realized by frequency converter.

Vorzugsweise werden die an der Spritzeinheit befestigten Düsen unter einem Winkel von 30° bis 60°, insbesondere 45° zur Bewegungsrichtung geneigt, was den Vorteil hat, dass auch vertikal stehende Flächenstücke gleichermaßen wie waagerecht liegende Werkstückflächen beim Besprühen erreicht werden. Da nur in einer Bewegungsrichtung gesprüht wird, sind alle Düsen in der gleichen Richtung geneigt, wobei optional eine Neigungsverstellung der Düsen vorgesehen sein kann.Preferably, the attached to the injection unit nozzles are inclined at an angle of 30 ° to 60 °, in particular 45 ° to the direction of movement, which has the advantage that vertically standing surface pieces are equally achieved as horizontal workpiece surfaces during spraying. Since only spraying in one direction of movement, all the nozzles are inclined in the same direction, optionally an inclination adjustment of the nozzles can be provided.

Gegebenenfalls ist die erfindungsgemäße Spritzeinrichtung in einer Kabine angeordnet, die zur Zuführung und Abführung der Werkstückteile Öffnungen aufweist. Insbesondere sind zur Zuförderung der Werkstücketeile Rollgänge und zur Abförderung Bandendlosförderer vorgesehen.Optionally, the injection device according to the invention is arranged in a cabin which has openings for the supply and removal of the workpiece parts. In particular, roller conveyors are provided for the conveyance of the workpiece parts and for the conveyance belt endless conveyors.

Um Werkstücke unterschiedlicher Dicken bzw. Höhen ohne Maschinenumrüstung bearbeiten zu können, ist nach einer weiteren Ausgestaltung der Erfindung die relative Lage der Spritzeinheiten zu dem Beschichtungsgut über eine vorhandene Messeinrichtung erfassbar und der Abstand der Spritzeinheiten zum Beschichtungsgut steuerbar oder regelbar. Auf diese Weise ist stets derselbe optimale Beschichtungsabstand zu gewährleisten.In order to process workpieces of different thicknesses or heights without machine conversion, according to a further embodiment of the invention, the relative position of the injection units to the coating material on an existing measuring device detectable and the distance of the injection units to the coating material controlled or regulated. In this way, the same optimum coating distance is always to be ensured.

Weitere Vorteile und Ausführungsformen der Erfindung sind in den Zeichnungen dargestellt. Es zeigen:

Fig. 1+2
jeweils schematische Seitenansichten der erfindungsgemäßen Vorrichtung.
Further advantages and embodiments of the invention are illustrated in the drawings. Show it:
Fig. 1 + 2
each schematic side views of the device according to the invention.

Die Spritzbeschichtungsvorrichtung besitzt insgesamt vier Spritzeinheiten 10, 11, 12 und 13, von denen zwei Spritzeinheiten 10, 11 oberhalb eines zu lackierenden Bleches 14 und zwei Spritzeinheiten 12, 13 unterhalb des zu lackierenden Bleches 14 angeordnet sind. Jede der Spritzeinheiten 10 bis 13 besitzt im dargestellten Ausführungsbeispiel zwei Düsen 15, 16, die mit nicht näher dargestellten Zuführeinrichtungen mit einem Lackierungsmittel versorgt werden. Die Spritzeinheiten 10 bis 13 sind, wie durch Pfeile 17 bis 20 gekennzeichnet, in der Blattebene hin- und herbewegbar, ferner, wie aus Fig. 1 und 2 ersichtlich, in der Höhe verstellbar. In Fig. 1 befinden sich die Spritzeinheiten 10 und 12 in ihrer Startposition, d.h. nächst möglich und mit eingestelltem Abstand zum zu bespritzenden Werkstück (Blech 14). Während des Spritzvorganges werden die Spritzeinheiten 10 und 12 von links nach rechts (entsprechend der Abbildung in Fig. 1) geführt. Hierbei wird das Blech 14 von oben und unten gleichmäßig lackiert. Während dieses Lackauftragens wird das Blech in einer senkrecht zur Zeichnungsebene stehenden Richtung weiter transportiert, wobei die Fortführungsgeschwindigkeit des Bleches etwa bei 3 bis 10 m/min liegt, während die Bewegungsgeschwindigkeit der Spritzeinheiten beim Lackieren bei 1 m/s oder darunter liegt. Während derselben Zeit, während die Spritzeinheiten 10 und 12 über die Blechbreite geführt werden, wird die Spritzeinheit 11 angehoben bzw. die Spritzeinheit 13 abgesenkt und in jeweils größerem Abstand zum Blech 14 mit größerer Rückförderungsgeschwindigkeit von beispielsweise 1,5 m/s in die Ausgangslage transportiert (in Fig. 1 links am Blattrand), wonach die Spritzeinheiten wieder in Richtung auf das Blech 14 abgesenkt bzw. angehoben werden. Der Abstand zu dem zu lackierenden Werkstück wird mittels Messeinrichtungen festgestellt und während des Lackierens konstant gehalten.The spray coating device has a total of four injection units 10, 11, 12 and 13, of which two injection units 10, 11 are arranged above a sheet 14 to be coated and two injection units 12, 13 below the sheet 14 to be painted. Each of the injection units 10 to 13 has in the illustrated embodiment, two nozzles 15, 16, which are supplied with supply means not shown in detail with a coating agent. The injection units 10 to 13 are, as indicated by arrows 17 to 20, back and forth in the leaf level, further, as shown in FIGS. 1 and 2, adjustable in height. In Fig. 1, the injection units 10 and 12 are in their starting position, ie next possible and with a set distance to be sprayed workpiece (plate 14). During the injection process, the injection units 10 and 12 are guided from left to right (corresponding to the illustration in FIG. 1). In this case, the sheet 14 is uniformly painted from above and below. During this paint application, the sheet is transported further in a direction perpendicular to the plane of the drawing, with the sheet advancing speed being about 3 to 10 m / min, while the speed of movement of the injection units is 1 m / s or less during painting. During the same time, while the injection units 10 and 12 are guided over the sheet width, the injection unit 11 is raised or the injection unit 13 is lowered and transported in each case greater distance from the plate 14 with a higher recirculation rate of, for example, 1.5 m / s to the starting position (left in Fig. 1 at the edge of the sheet), after which the injection units are lowered or raised again in the direction of the sheet 14. The distance to the To be painted workpiece is determined by means of measuring devices and kept constant during painting.

Aus Fig. 2 ist ersichtlich, dass die Spritzeinheiten 10, 11 und 12, 13 allesamt in einer einzigen Eben liegen, die senkrecht zu der Förderebene und Querschnittebene des Bleches (14) liegt. Mit anderen Worten: Die Spritzeinheiten 10 und 11 werden auf einer geschlossenen, annähernd rechtwinkligen Bahn geführt, welche eine Ebene beschreibt, die senkrecht zu der Werkstückebene liegt. Mit 21 und 22 sind die Sprühkegel bezeichnet, die beim Spritzbeschichten gebildet werden. Selbstverständlich besitzt jede Spritzeinrichtung so viele nebeneinander angeordnete Düsen, dass ein vorbestimmter entsprechend großer Streifen des zu beschichteten Werkstückes erfasst wird. Durch Überführung der Düsen über die gesamte Breite des Werkstückes wird so das Werkstück jeweils streifenweise nach und nach lackiert, bis das Werkstück durch die Vorschubbewegung komplett über seine gesamte Länge unter den Düsen hindurchgeführt bzw. (bei Beschichtung von unten) über den Düsen hinweggeführt worden ist.From Fig. 2 it can be seen that the injection units 10, 11 and 12, 13 are all in a single plane, which is perpendicular to the conveying plane and cross-sectional plane of the sheet (14). In other words, the injection units 10 and 11 are guided on a closed, approximately rectangular path, which describes a plane which is perpendicular to the workpiece plane. With 21 and 22, the spray cones are referred to, which are formed during spray coating. Of course, each spraying device has so many juxtaposed nozzles that a predetermined correspondingly large strip of the workpiece to be coated is detected. By transferring the nozzles over the entire width of the workpiece so the workpiece is in each case gradually painted gradually until the workpiece has been passed through the feed motion completely over its entire length under the nozzle or has been passed away (in the case of coating from below) over the nozzles ,

Die Vorschubgeschwindigkeit des Werkstückes 14, die Spritzkegel sowie die erfasste Spritzbreite und die Vorschubgeschwindigkeit der Spritzeinheiten 10 bis 13 sind aufeinander abgestimmt. Erfindungsgemäß wird das Blech 14 nur bei einer Vorschubrichtung der Düsen 15 und 16 lackiert, weshalb alle Düsen in der gleichen Richtung geneigt sind. Auf dem Rückweg der Düsen in die Ausgangslage wird eine deutlich höhere Vorschubgeschwindigkeit gewählt, die bis zu 2mal so groß wie die Vorschubgeschwindigkeit sein kann.The feed rate of the workpiece 14, the spray cone and the detected spray width and the feed rate of the injection units 10 to 13 are coordinated. According to the invention, the sheet 14 is painted only at a feed direction of the nozzles 15 and 16, which is why all the nozzles are inclined in the same direction. On the way back of the nozzles in the starting position, a significantly higher feed rate is selected, which can be up to twice as large as the feed rate.

Claims (9)

Vorrichtung zur Spritzbeschichtung von Werkstücken (14), insbesondere von Metallbauteilen wie Blechen, die über eine Förderstrecke transportiert und hierbei durch quer zu dieser Förderstrecke bewegte Spritzdüsen (15, 16) beschichtet werden, die an zwei oder mehr separaten, jeweils mit mindestens einer Spritzdüse ausgestatteten, hin- und herbewegbaren Spritzeinheiten (10 bis 13) angeordnet sind,
dadurch gekennzeichnet, dass
auf einer Beschichtungsseite des Metallbauteils (14) zwei Spritzeinheiten (10, 11; 12, 13) gleichzeitig in einer einzigen gemeinsamen Bewegungsebene so geführt werden, dass sie eine geschlossene Bahn durchlaufen, wobei in einer Bewegungsrichtung Spritzbeschichtungen durchführbar und auf dem Rückweg die Spritzeinheiten, vorzugsweise mit höherer Geschwindigkeit, an der anderen Spritzeinheit vorbeiführbar sind.Apparatus for spray coating of workpieces (14), in particular metal components such as metal sheets, which are transported over a conveyor line and coated by spray nozzles (15, 16) moved transversely to this conveyor line, which are provided at two or more separate, each with at least one spray nozzle , reciprocating injection units (10 to 13) are arranged,
characterized in that
on a coating side of the metal component (14) two injection units (10, 11, 12, 13) are simultaneously guided in a single common plane of movement so that they pass through a closed path, wherein in one direction spray coatings feasible and on the way back the injection units, preferably at a higher speed, can be moved past the other injection unit. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die gemeinsame Bewegungsebene vertikal zur Förderrichtung liegt.Apparatus according to claim 1, characterized in that the common plane of movement is vertical to the conveying direction. Vorrichtung nach Anspruch 1 oder 2, gekennzeichnet durch je zwei Spritzeinheiten auf gegenüberliegenden Seiten der Förderstrecke.Apparatus according to claim 1 or 2, characterized by two injection units each on opposite sides of the conveying path . Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Spritzeinheiten (10 bis 13) mit Geschwindigkeiten von maximal 1,4 m/s, vorzugsweise ≤1 m/s zur Spritzbeschichtung und mit ≥1,5 m/s, vorzugsweise ≥ 2 m/s auf dem Rückweg bewegbar sind.Device according to one of claims 1 to 3, characterized in that the injection units (10 to 13) with velocities of at most 1.4 m / s, preferably ≤1 m / s for spray coating and ≥1.5 m / s, preferably ≥ 2 m / s on the way back. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Spritzeinheiten (10 bis 13) über zwei Motoren antreibbar sind.Device according to one of claims 1 to 4, characterized in that the injection units (10 to 13) are drivable via two motors. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die an der Spritzeinheit befestigten Düsen (15, 16) unter einem Winkel von 30° bis 60°, vorzugsweise 45° zur Bewegungsrichtung geneigt sind.Device according to one of claims 1 to 5, characterized in that the attached to the injection unit nozzles (15, 16) at an angle are tilted from 30 ° to 60 °, preferably 45 ° to the direction of movement. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Spritzeinrichtungen in einer Kabine angeordnet sind, die zur Zuführung und Abführung der Werkstückteile Öffnungen aufweist.Device according to one of claims 1 to 6, characterized in that the injection devices are arranged in a cabin which has openings for the supply and removal of the workpiece parts. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Werkstückteile über Rollgänge zugefördert und über einen Bandendlosförderer abgefördert werden.Device according to one of claims 1 to 7, characterized in that the workpiece parts are conveyed via roller tables and conveyed away via a belt endless conveyor. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die relative Lage der Spritzeinheiten zu dem Beschichtungsgut über eine Messeinrichtung erfassbar und deren Abstand zum Beschichtungsgut steuer- oder regelbar ist.Device according to one of claims 1 to 8, characterized in that the relative position of the injection units to the coating material can be detected by a measuring device and their distance from the coating material is controlled or regulated.
EP07004727A 2006-03-24 2007-03-08 Device for spray coating workpieces Not-in-force EP1837084B1 (en)

Applications Claiming Priority (1)

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DE102006014101A DE102006014101A1 (en) 2006-03-24 2006-03-24 Apparatus for spray coating workpieces

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EP1837084A2 true EP1837084A2 (en) 2007-09-26
EP1837084A3 EP1837084A3 (en) 2008-07-02
EP1837084B1 EP1837084B1 (en) 2010-05-19

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AT (1) ATE468177T1 (en)
DE (2) DE102006014101A1 (en)

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WO2019004961A3 (en) * 2017-03-07 2019-03-21 Demaksan Deri̇ İnşaat San.Mak.San.Ve Ti̇c.Ltd.Şti̇. Painting system with zag plus method
CN116532334A (en) * 2023-04-14 2023-08-04 联德(广州)机械有限公司 Aluminum profile spraying process and spraying production line

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DE2323572A1 (en) 1973-05-10 1974-11-28 Walther Fa Richard C SPRAY COATING DEVICE
DE3420633A1 (en) 1984-06-02 1985-12-05 Ulrich 5600 Wuppertal Köhne DEVICE FOR SPRAY COATING WORKPIECES

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019004961A3 (en) * 2017-03-07 2019-03-21 Demaksan Deri̇ İnşaat San.Mak.San.Ve Ti̇c.Ltd.Şti̇. Painting system with zag plus method
CN116532334A (en) * 2023-04-14 2023-08-04 联德(广州)机械有限公司 Aluminum profile spraying process and spraying production line

Also Published As

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DE502007003817D1 (en) 2010-07-01
EP1837084A3 (en) 2008-07-02
EP1837084B1 (en) 2010-05-19
DE102006014101A1 (en) 2007-09-27
ATE468177T1 (en) 2010-06-15

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