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EP1353757A1 - Device for coating an elongated workpiece - Google Patents

Device for coating an elongated workpiece

Info

Publication number
EP1353757A1
EP1353757A1 EP02708267A EP02708267A EP1353757A1 EP 1353757 A1 EP1353757 A1 EP 1353757A1 EP 02708267 A EP02708267 A EP 02708267A EP 02708267 A EP02708267 A EP 02708267A EP 1353757 A1 EP1353757 A1 EP 1353757A1
Authority
EP
European Patent Office
Prior art keywords
coating
outlet
workpiece
die
outlet guide
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
EP02708267A
Other languages
German (de)
French (fr)
Other versions
EP1353757B1 (en
Inventor
Stefan Schiele
Uwe Steinfink
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Josef Schiele OHG
Original Assignee
Josef Schiele OHG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Josef Schiele OHG filed Critical Josef Schiele OHG
Publication of EP1353757A1 publication Critical patent/EP1353757A1/en
Application granted granted Critical
Publication of EP1353757B1 publication Critical patent/EP1353757B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • B05B13/0207—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the work being an elongated body, e.g. wire or pipe

Definitions

  • the invention relates to a device for applying a coating medium to at least a partial surface of an elongate workpiece which is transported in its longitudinal direction, consisting of a coating chamber which can be subjected to vacuum and has an inlet die and an outlet die, a coating frame and an outlet guide arranged in front of the outlet die.
  • the coating chamber is provided for the passage of the workpiece with an inlet die and an outlet die, both of which are adapted to the cross section of the workpiece, but are designed to be larger by a predetermined amount, so that a circumferential, constant gap is present between the surface of the workpiece and the dies , Air is sucked in from the outside via the gap in the inlet die and in the outlet die, so that a vacuum of the desired size is established in the coating chamber.
  • a coating frame is provided which has either several bores or several flat jet nozzles, through which the coating medium is sprayed onto at least part of the surface of the workpiece.
  • the invention is based on the object of demonstrating a device for applying a coating medium on at least one partial surface of an elongated workpiece which is transported in its longitudinal direction, in which a more uniform and constant application of the coating medium is achieved without additional effort, which is still effective even at higher production speeds allows very good quality of the coating.
  • the mask that was previously required is to be dispensed with.
  • the coating frame is designed as a flat nozzle and is arranged between the outlet guide and the outlet die.
  • the coating chamber can be made shorter, so that smaller application units result.
  • the application of the coating medium can be better controlled and the bead of coating agent that arises at the end of a workpiece can be reduced.
  • the coating frame is either connected to the outlet guide or integrated in the outlet guide.
  • Coating chamber 3 shown, which is connected to a vacuum line 4.
  • This coating chamber 3 has on the one hand an inlet die 5 and on the other hand an outlet die 6, the cross section of which corresponds to the cross section of the workpiece 2 but is slightly larger on all sides, so that a gap 7 of predetermined size extends around the workpiece 2 on all sides. Air is drawn in from the outside via column 7 due to the vacuum applied to the coating chamber 3. Due to the size or the cross section of the column 7, a vacuum of a predetermined size can now be achieved in the coating chamber 3.
  • a channel 9 is located in this outlet guide 8, which is supplied with a coating medium, for example paint, via a line (not shown in the drawing).
  • a coating medium for example paint
  • a line not shown in the drawing.
  • a so-called flat nozzle 10 leads outwards in the direction of the workpiece 2.
  • the coating medium is now applied or sprayed onto at least part of the surface of the elongated workpiece 2. Due to the fact that the application of the coating medium - seen in the transport direction of the workpiece 2 - takes place behind the outlet guide 8, no defects in the coating on the workpiece 2 are generated by the latter.
  • the coating is now applied to the workpiece 2 in the transport direction. Excess coating medium is entrained by the air sucked in via the gap 7 in the outlet die 6. As a result of this configuration, the coating medium reaches the workpiece 2 at all the provided locations, so that defects in this regard are also excluded.
  • the coating frame designed as a flat nozzle 10 is integrated in the outlet guide 8, it can also be designed as a separate frame which is either connected to the outlet guide 8 or is arranged as a separate component between the outlet guide 8 and the outlet die 6.

Landscapes

  • Coating Apparatus (AREA)
  • Physical Vapour Deposition (AREA)

Abstract

The invention relates to a device for applying a coating medium to at least one part of the surface of an elongated workpiece (2) which is transported in its longitudinal direction. Said device consists of a coating chamber (3) which is subjected to a vacuum (3) and comprises an inlet matrix (5) and an outlet matrix (6), a coating frame (10) and an outlet guide (8) which is arranged upstream in relation to the outlet matrix (6).

Description

Beschichtungsvorrichtung für ein langgestrecktes Werkstück Coating device for an elongated workpiece
Die Erfindung bezieht sich auf eine Vorrichtung zum Auftragen eines Beschichtungsmediums auf zumindest eine Teiloberfläche eines langgestreckten und in seiner Längsrichtung transportierten Werkstückes, bestehend aus einer mit Vakuum beaufschlagbaren Beschichtungskammer mit einer Einlaßmatritze und einer Auslaßmatritze, einem Beschichtungsrahmen und einer vor der Auslaßmatritze angeordneten Auslaufführung.The invention relates to a device for applying a coating medium to at least a partial surface of an elongate workpiece which is transported in its longitudinal direction, consisting of a coating chamber which can be subjected to vacuum and has an inlet die and an outlet die, a coating frame and an outlet guide arranged in front of the outlet die.
Es ist bekannt, langgestreckte und in ihrer Längsrichtung transportierte Werkstücke zumindest auf einem Teil ihrer Oberfläche mit einem Beschichtungsmedium zu versehen. Als Beschichtungsmedien werden pump- und filterfähige, düsengängige Flüssigkeiten wie Pigmentlösungen, Farben, Lacke, Grundierungen und Imprägnierungsmittel eingesetzt. Für den Beschichtungsvorgang wird das Werkstück durch eine Beschichtungskammer bewegt, an die eine Vakuumleitung angeschlossen ist. Die Beschichtungskammer ist für den Durchlaß des Werkstückes mit einer Einlaßmatritze und einer Auslaßmatritze versehen, die beide dem Querschnitt des Werkstückes angepaßt, jedoch um ein vorgegebenes Maß größer ausgebildet sind, so dass ein umlaufender, gleichbleibender Spalt zwischen der Oberfläche des Werkstückes und den Matritzen vorhanden ist. Über den Spalt in der Einlaßmatritze und in der Auslaßmatritze wird Luft von außen angesaugt, so dass sich in der Beschichtungskammer ein Vakuum angestrebter Größe einstellt. Am Eingang der Beschichtungskammer, also kurz hinter der Einlaßmatritze, ist ein Beschichtungsrahmen vorgesehen, der entweder mehrere Bohrungen oder mehrere Flachstrahldüsen besitzt, über die das Beschichtungsmedium zumindest auf einen Teil der Oberfläche des Werkstückes aufgesprüht wird. Hinter dem Beschichtungsrahmen befindet sich mit Abstand vor der Auslaßmatritze noch eine Auslaufführung für das Werkstück. Bei einer derartigen Vorrichtung wird das Beschichtungsmedium am Eingang der Beschichtungskammer immer entgegen der Luftströmung auf das Werkstück aufgetragen. Dabei besteht die Gefahr, dass das Beschichtungsmedium, zumindest stellenweise, das Werkstück nicht erreicht. Bei einer verhältnismäßig dünnen Beschichtung kann es darüber hinaus noch im Bereich der Auslaufführung zu Fehlstellen kommen, da an den Berührungspunkten keine sogenannte Verschlichtung der Beschichtung durch angesaugte Luft erfolgt. Der Erfindung liegt nun die Aufgabe zugrunde, eine Vorrichtung zum Auftragen eines Beschichtungsmediums auf zumindest einer Teiloberfläche eines langgestreckten und in seiner Längsrichtung transportierten Werkstückes aufzuzeigen, bei der ohne zusätzlichen Aufwand ein gleichmäßigerer und konstanter Auftrag des Beschichtungsmediums erreicht wird, der auch bei höheren Produktionsgeschwindigkeiten noch eine sehr gute Qualität der Beschichtung zuläßt. Zusätzlich soll bei einer dreiseitigen Beschichtung die bisher immer erforderliche Abdeckmaske entfallen.It is known to provide elongate workpieces that are transported in their longitudinal direction with a coating medium on at least part of their surface. Pumpable and filterable, nozzle-compatible liquids such as pigment solutions, paints, varnishes, primers and impregnating agents are used as coating media. For the coating process, the workpiece is moved through a coating chamber to which a vacuum line is connected. The coating chamber is provided for the passage of the workpiece with an inlet die and an outlet die, both of which are adapted to the cross section of the workpiece, but are designed to be larger by a predetermined amount, so that a circumferential, constant gap is present between the surface of the workpiece and the dies , Air is sucked in from the outside via the gap in the inlet die and in the outlet die, so that a vacuum of the desired size is established in the coating chamber. At the entrance of the coating chamber, ie shortly behind the inlet die, a coating frame is provided which has either several bores or several flat jet nozzles, through which the coating medium is sprayed onto at least part of the surface of the workpiece. Behind the coating frame there is a discharge guide for the workpiece at a distance in front of the outlet die. In such a device, the coating medium is always applied to the workpiece against the air flow at the entrance to the coating chamber. There is a risk that the coating medium, at least in places, will not reach the workpiece. In the case of a relatively thin coating, defects can also occur in the area of the outlet guide, since there is no so-called sizing of the coating by suctioned air at the contact points. The invention is based on the object of demonstrating a device for applying a coating medium on at least one partial surface of an elongated workpiece which is transported in its longitudinal direction, in which a more uniform and constant application of the coating medium is achieved without additional effort, which is still effective even at higher production speeds allows very good quality of the coating. In addition, in the case of a three-sided coating, the mask that was previously required is to be dispensed with.
Zur Lösung dieser Aufgabe wird gemäß der Erfindung bei einer Vorrichtung der eingangs beschriebenen Gattung vorgeschlagen, dass der Beschichtungsrahmen als Flachdüse ausgebildet und zwischen der Auslaufführung und der Auslaßmatritze angeordnet ist.To achieve this object, it is proposed according to the invention in a device of the type described in the introduction that the coating frame is designed as a flat nozzle and is arranged between the outlet guide and the outlet die.
Durch eine derartige Ausgestaltung der Vorrichtung wird auch bei verhältnismäßig hohen Vorschubgeschwindigkeiten eine gleichmäßige und konstante Beschichtung erreicht. Das Auftreten von Fehlstellen wird vermieden, zumindest aber in erheblichem Maße reduziert. Die Beschichtungskammer kann kürzer ausgebildet sein, so dass sich kleinere Auftragseinheiten ergeben. Der Auftrag des Beschichtungsmediums kann besser gesteuert werden und der am Ende eines Werkstückes entstehende Wulst aus dem Beschichtungsmittel kann reduziert werden.With such a configuration of the device, a uniform and constant coating is achieved even at relatively high feed speeds. The occurrence of defects is avoided, but at least reduced to a considerable extent. The coating chamber can be made shorter, so that smaller application units result. The application of the coating medium can be better controlled and the bead of coating agent that arises at the end of a workpiece can be reduced.
Der Beschichtungsrahmen ist gemäß einer weiteren Ausgestaltung der Erfindung entweder mit der Auslaufführung verbunden oder in der Auslaufführung integriert.According to a further embodiment of the invention, the coating frame is either connected to the outlet guide or integrated in the outlet guide.
Die Erfindung wird nachfolgend anhand eines in einer Zeichnung in vereinfachter Weise und nicht unbedingt maßgerecht dargestellten Ausführungsbeispieles näher erläutert.The invention is explained in more detail below on the basis of an exemplary embodiment shown in a drawing in a simplified manner and not necessarily to size.
In dieser Zeichnung ist von einer Vorrichtung zum Auftragen eines Beschichtungsmediums auf zumindest eine Teiloberfläche eines langgestreckten und in seiner Längsrichtung gemäß dem Pfeil 1 transportierten Werkstückes 2 nur eine Beschichtungskammer 3 gezeigt, die an eine Vakuumleitung 4 angeschlossen ist. Diese Beschichtungskammer 3 besitzt einerseits eine Einlaßmatritze 5 und andererseits eine Auslaßmatritze 6, deren Querschnitt dem Querschnitt des Werkstückes 2 entspricht, allseitig jedoch geringfügig größer ist, so dass sich um das Werkstück 2 allseitig ein Spalt 7 vorgegebener Größe erstreckt. Über die Spalte 7 wird aufgrund des an die Beschichtungskammer 3 angelegten Vakuums Luft von außen angesaugt. Aufgrund der Größe bzw. dem Querschnitt der Spalte 7 kann nun ein Vakuum vorgegebener Größe in der Beschichtungskammer 3 erreicht werden.In this drawing, only one of a device for applying a coating medium to at least one partial surface of an elongated workpiece 2 that is transported in its longitudinal direction according to arrow 1 is shown Coating chamber 3 shown, which is connected to a vacuum line 4. This coating chamber 3 has on the one hand an inlet die 5 and on the other hand an outlet die 6, the cross section of which corresponds to the cross section of the workpiece 2 but is slightly larger on all sides, so that a gap 7 of predetermined size extends around the workpiece 2 on all sides. Air is drawn in from the outside via column 7 due to the vacuum applied to the coating chamber 3. Due to the size or the cross section of the column 7, a vacuum of a predetermined size can now be achieved in the coating chamber 3.
In der Beschichtungskammer 3 befindet sich mit Abstand von der Auslaßmatritze 6 eine Auslaufführung 8, die einen lagegenauen Transport des Werkstückes 2 sicherstellt. In dieser Auslaufführung 8 befindet sich im dargestellten Ausführungsbeispiel ein Kanal 9, der über eine in der Zeichnung nicht dargestellte Leitung mit einem Beschichtungsmedium, beispielsweise Lack, beaufschlagt wird. Von diesem Kanal 9 führt eine sogenannte Flachdüse 10 nach außen in Richtung auf das Werkstück 2. Über diese Flachdüse 10 wird nun das Beschichtungsmedium auf zumindest einen Teil der Oberfläche des langgestreckten Werkstückes 2 aufgetragen bzw. aufgesprüht. Dadurch bedingt, dass der Auftrag des Beschichtungsmediums - in Transportrichtung des Werkstückes 2 gesehen - hinter der Auslaufführung 8 erfolgt, werden durch dieselbe keine Fehlstellen der Beschichtung auf dem Werkstück 2 erzeugt. Die Beschichtung wird jetzt in Transportrichtung des Werkstückes 2 auf dasselbe aufgetragen. Durch die über den Spalt 7 in der Auslaßmatritze 6 angesaugte Luft, wird überschüssiges Beschichtungsmedium mitgerissen. Das Beschichtungsmedium erreicht durch diese Ausgestaltung an allen vorgesehenen Stellen das Werkstück 2, so dass auch diesbezügliche Fehlstellen ausgeschlossen sind.In the coating chamber 3 there is an outlet guide 8 at a distance from the outlet die 6, which ensures that the workpiece 2 is transported in the correct position. In the illustrated embodiment, a channel 9 is located in this outlet guide 8, which is supplied with a coating medium, for example paint, via a line (not shown in the drawing). From this channel 9, a so-called flat nozzle 10 leads outwards in the direction of the workpiece 2. Via this flat nozzle 10, the coating medium is now applied or sprayed onto at least part of the surface of the elongated workpiece 2. Due to the fact that the application of the coating medium - seen in the transport direction of the workpiece 2 - takes place behind the outlet guide 8, no defects in the coating on the workpiece 2 are generated by the latter. The coating is now applied to the workpiece 2 in the transport direction. Excess coating medium is entrained by the air sucked in via the gap 7 in the outlet die 6. As a result of this configuration, the coating medium reaches the workpiece 2 at all the provided locations, so that defects in this regard are also excluded.
Während beim dargestellten und beschriebenen Ausführungsbeispiel der als Flachdüse 10 ausgebildete Beschichtungsrahmen in der Auslaufführung 8 integriert ist, kann derselbe auch als getrennter Rahmen ausgebildet sein, der entweder mit der Auslaufführung 8 verbunden oder als getrenntes Bauteil zwischen der Auslaufführung 8 und der Auslaßmatritze 6 angeordnet ist. While in the illustrated and described exemplary embodiment the coating frame designed as a flat nozzle 10 is integrated in the outlet guide 8, it can also be designed as a separate frame which is either connected to the outlet guide 8 or is arranged as a separate component between the outlet guide 8 and the outlet die 6.

Claims

Patentansprüche: claims:
1. Vorrichtung zum Auftragen eines Beschichtungsmediums auf zumindest eine Teiloberfläche eines langgestreckten und in seiner Längsrichtung transportierten Werkstückes, bestehend aus einer mit Vakuum beaufschlagbaren Beschichtungskammer mit einer Einlaßmatritze und einer Auslaßmatritze, einem Beschichtungsrahmen und einer vor der Auslaßmatritze angeordneten Auslaufführung, dadurch gekennzeichnet, dass der Beschichtungsrahmen als Flachdüse (10) ausgebildet und zwischen der Auslaufführung (8) und der Auslaßmatritze (6) angeordnet ist.1. Apparatus for applying a coating medium to at least a partial surface of an elongate workpiece which is transported in its longitudinal direction, consisting of a coating chamber which can be subjected to a vacuum and has an inlet die and an outlet die, a coating frame and an outlet guide arranged in front of the outlet die, characterized in that the coating frame designed as a flat nozzle (10) and is arranged between the outlet guide (8) and the outlet die (6).
2. , Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass der Beschichtungsrahmen mit der Auslaufführung (8) verbunden ist.2., Device according to claim 1, characterized in that the coating frame is connected to the outlet guide (8).
3. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass der Beschichtungsrahmen in der Auslaufführung (8) integriert ist. 3. Device according to claim 1, characterized in that the coating frame is integrated in the outlet guide (8).
EP02708267A 2001-01-12 2002-01-09 Device for coating an elongated workpiece Expired - Lifetime EP1353757B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20100504U DE20100504U1 (en) 2001-01-12 2001-01-12 Coating device for an elongated workpiece
DE20100504U 2001-01-12
PCT/EP2002/000135 WO2002055214A1 (en) 2001-01-12 2002-01-09 Device for coating an elongated workpiece

Publications (2)

Publication Number Publication Date
EP1353757A1 true EP1353757A1 (en) 2003-10-22
EP1353757B1 EP1353757B1 (en) 2005-06-15

Family

ID=7951495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02708267A Expired - Lifetime EP1353757B1 (en) 2001-01-12 2002-01-09 Device for coating an elongated workpiece

Country Status (4)

Country Link
EP (1) EP1353757B1 (en)
AT (1) ATE297814T1 (en)
DE (2) DE20100504U1 (en)
WO (1) WO2002055214A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004057299A1 (en) * 2004-11-26 2006-06-01 Josef Schiele Ohg Apparatus for applying a coating medium to elongated workpieces with a guide device
DE102006046797A1 (en) * 2006-09-29 2008-04-03 Josef Schiele Ohg Method for uniformly applying a passivating agent on a metallic workpiece which can be adjusted in height and width comprises applying a negative pressure in the application chamber during application of the passivating agent

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2213984C2 (en) * 1972-03-22 1982-12-16 Philipp Holzmann Ag, 6000 Frankfurt Steel bar spraying equipment - has mixing chamber for compressed-air and rust-protecting agent before annular gap
SE469267B (en) * 1991-07-01 1993-06-14 Candor Sweden Ab Surface treatment device, whereby a medium under pressure is aimed at a continuous material web in a cavity
US5316588A (en) * 1992-06-16 1994-05-31 Amcol Corporation System for spraying material on tubing and reclaiming excess material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02055214A1 *

Also Published As

Publication number Publication date
ATE297814T1 (en) 2005-07-15
EP1353757B1 (en) 2005-06-15
DE50203407D1 (en) 2005-07-21
DE20100504U1 (en) 2001-05-10
WO2002055214A1 (en) 2002-07-18

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