EP1287903A1 - Wall comprising a honeycomb structure for an electrostatic powder coating booth - Google Patents

Wall comprising a honeycomb structure for an electrostatic powder coating booth Download PDF

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Publication number
EP1287903A1
EP1287903A1 EP02017537A EP02017537A EP1287903A1 EP 1287903 A1 EP1287903 A1 EP 1287903A1 EP 02017537 A EP02017537 A EP 02017537A EP 02017537 A EP02017537 A EP 02017537A EP 1287903 A1 EP1287903 A1 EP 1287903A1
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EP
European Patent Office
Prior art keywords
honeycomb structure
wall element
core layer
wall
cover layers
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.)
Withdrawn
Application number
EP02017537A
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German (de)
French (fr)
Inventor
Michael Topp
Bernd Lutz
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.)
J Wagner AG
Original Assignee
J Wagner AG
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 J Wagner AG filed Critical J Wagner AG
Publication of EP1287903A1 publication Critical patent/EP1287903A1/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
    • B05B16/00—Spray booths
    • B05B16/40—Construction elements specially adapted therefor, e.g. floors, walls or ceilings

Definitions

  • the invention relates to a wall element of a cabin for electrostatic powder coating with an inner and an outer cover layer made of electrically non-conductive material and a core layer.
  • Modules-like booths for powder coating can be made different from such wall elements Build up dimensions, as described for example in EP 0 588 003 B1 is.
  • the wall elements described there have a core layer made of polyurethane foam, that of an outer cover layer and an inner cover layer made of polyvinyl chloride (PVC) is covered, with an additional electrically conductive separating layer between Core layer and one of the two cover layers can be provided.
  • the contiguous Core layer can be provided by separate spacers provided at regular intervals be replaced, e.g. from US-A-5,259,879, Figures 8a, b and 13a, b.
  • the invention has for its object a wall element for the modular structure a cabin for electrostatic powder coating to indicate the powder deposits inside the cabin minimized and its wall thickness smaller than in the known cabin can be held.
  • the core layer consists from a coherent honeycomb structure, which provides the highest level of strength guaranteed at a significantly lower overall thickness than in the known wall element.
  • the preferably with their main axis oriented normal to the cover layers, one below the other connected honeycombs of the honeycomb structure have a very small wall thickness and nevertheless support cover layers of very small wall thickness with sufficient stability.
  • a particular advantage of the invention results from the fact that the interconnected Honeycombs of the core layer prevent air exchange within the core layer and thus Minimize local static charges on the wall element.
  • honeycomb structure as the core layer, which too the significantly reduced overall thickness of the wall element leads to the same stability. episode
  • the reduced total powder thickness is the low total thickness.
  • the honeycomb structure also leads to the reduction in weight mentioned and thus also to a saving in material.
  • the conventional wall element according to FIG. 1 has an outer cover layer 2, an inner one Cover layer 4 and a core layer 6 separately therebetween at regular intervals arranged spacers 8.
  • Both the two cover layers 2, 4 and the spacers 8 of the core layer 6 exist made of an electrically non-conductive plastic, such as PVC.
  • FIG. 1 10 field lines of an electrostatic field are indicated with the reference number, that builds up across the wall element shown, especially in the area of Spacers 8.
  • 4 deposits form on the inside of the cover layer from the electrically charged powder particles from excess powder.
  • FIG. 2 shows the structure of a wall element according to the invention.
  • an outer cover layer 22 and an inner cover layer 24 are provided at a distance from one another, this distance being formed by a coherent core layer 26 from a coherent Honeycomb structure is bridged with honeycomb 28.
  • honeycomb 28 For the sake of clarity only a few honeycombs 28 are shown, but the entire space is contiguous fill between the two cover layers 22 and 24.
  • honeycombs 28 of the honeycomb structure according to FIG. 2 are normal to the main axes Cover layers 22, 24 oriented. This alignment of the honeycomb structure is advantageous in that than it should ensure maximum stability with the smallest wall thickness of the honeycomb material.
  • the wall element according to the invention also exists 2, both the cover layers 22, 24 and the honeycomb structure 26 of the core layer made of an electrically non-conductive plastic, for example PVC. of course is another material made of non-conductive material is conceivable in particular for the honeycomb structure.
  • a booth can be powder coated in any way Build up sizes.
  • the doors of such a cabin can also be made from these wall elements exist, such doors, for example, at the ends of an elongated Cabin for the passage of workpieces in the longitudinal direction as well as on the side walls can be provided for an external manual coating station.
  • Cabins made of wall elements according to the invention unlike known cabins, have one angular exterior.
  • the total thickness of the wall elements according to the invention can be smaller than the wall thickness are kept by well-known cabins.

Abstract

A wall element for an electrostatic powder coating cabin, consists of inner and outer cover layers (22,24) made of a material which does not conduct electricity, and a core layer. The latter consists of a honeycombed structure (26) made of e.g. PVC. The cover layers are also made of PVC.

Description

Die Erfindung betrifft ein Wandelement einer Kabine für elektrostatisches Pulverbeschichten mit einer inneren und einer äußeren Deckschicht aus elektrisch nicht leitendem Material sowie einer Kernschicht.The invention relates to a wall element of a cabin for electrostatic powder coating with an inner and an outer cover layer made of electrically non-conductive material and a core layer.

Aus derartigen Wandelementen lassen sich modulartig Kabinen zum Pulverbeschichten unterschiedlicher Abmessungen aufbauen, wie dies beispielsweise in der EP 0 588 003 B1 beschrieben ist. Die dort beschriebenen Wandelemente haben eine Kernschicht aus Polyurethanschaum, die von einer äußeren Deckschicht und einer inneren Deckschicht aus Polyvinylchlorid (PVC) bedeckt ist, wobei zusätzlich noch eine elektrisch leitende Trennschicht zwischen Kernschicht und einer der beiden Deckschichten vorgesehen sein kann. Die zusammenhängende Kernschicht kann durch in regelmäßigen Abständen vorgesehene, separate Abstandhalter ersetzt sein, wie z.B. aus der US-A-5,259,879, Fig. 8a,b und 13a,b bekannt ist.Modules-like booths for powder coating can be made different from such wall elements Build up dimensions, as described for example in EP 0 588 003 B1 is. The wall elements described there have a core layer made of polyurethane foam, that of an outer cover layer and an inner cover layer made of polyvinyl chloride (PVC) is covered, with an additional electrically conductive separating layer between Core layer and one of the two cover layers can be provided. The contiguous Core layer can be provided by separate spacers provided at regular intervals be replaced, e.g. from US-A-5,259,879, Figures 8a, b and 13a, b.

Der Erfindung liegt die Aufgabe zugrunde, ein Wandelement für den modulartigen Aufbau einer Kabine für elektrostatisches Pulverbeschichten anzugeben, das Pulverablagerungen innerhalb der Kabine minimiert und dessen Wanddicke kleiner als bei der bekannten Kabine gehalten werden kann.The invention has for its object a wall element for the modular structure a cabin for electrostatic powder coating to indicate the powder deposits inside the cabin minimized and its wall thickness smaller than in the known cabin can be held.

Diese Aufgabe ist durch Patentanspruch 1 gelöst.This object is solved by claim 1.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben. Advantageous embodiments of the invention are specified in the subclaims.

Bei einer aus Wandelementen gemäß der Erfindung aufgebauten Kabine besteht die Kernschicht aus einer zusammenhängenden Wabenstruktur, welche ein Höchstmaß an Festigkeit bei erheblich niedriger Gesamtdicke als bei dem bekannten Wandelement gewährleistet. Die vorzugsweise mit ihrer Hauptachse normal zu den Deckschichten orientierten, untereinander verbundenen Waben der Wabenstruktur haben sehr kleine Wandstärke und stützen gleichwohl die Deckschichten sehr kleiner Wandstärke mit ausreichender Stabilität ab.In the case of a cabin constructed from wall elements according to the invention, the core layer consists from a coherent honeycomb structure, which provides the highest level of strength guaranteed at a significantly lower overall thickness than in the known wall element. The preferably with their main axis oriented normal to the cover layers, one below the other connected honeycombs of the honeycomb structure have a very small wall thickness and nevertheless support cover layers of very small wall thickness with sufficient stability.

Ein besonderer Vorteil der Erfindung ergibt sich daraus, daß die miteinander verbundenen Waben der Kernschicht einen Luftaustausch innerhalb der Kernschicht verhindern und somit lokale statische Aufladungen des Wandelements minimieren.A particular advantage of the invention results from the fact that the interconnected Honeycombs of the core layer prevent air exchange within the core layer and thus Minimize local static charges on the wall element.

Zwischen den beiden Deckschichten befindet sich nur ein sehr geringer Anteil an Wabenmaterial im Vergleich zu der zwischen den Deckschichten eingeschlossenen Luft. Dies führt, wie Versuche ergeben haben, zu sehr viel weniger Anlagerung von Überschußpulver an den Innenwänden einer mit den erfindungsgemäßen Wandelementen aufgebauten Kabine als bei den Wandelementen gemäß dem Stand der Technik. Insbesondere trifft dies im Vergleich zu einer Ausführung der Wandelemente nach dem Stand der Technik mit Abstandhaltern zu. Dort hat man beobachtet, daß die aus Stabilitätsgründen mit großen Querschnitten versehenen Abstandhalter zu besonders starken Pulveransammlungen führen, weil die Luft in der Kernschicht zwischen diesen Abstandhaltern frei zirkulieren kann und sich die Feldlinien des elektrischen Feldes im Bereich der Abstandhalter konzentrieren, um so zu der unerwünscht starken Ansammlung der elektrisch geladenen Pulverpartikel zu führen.There is only a very small proportion of honeycomb material between the two cover layers compared to the air trapped between the cover layers. This leads to how Attempts have shown to much less build up of excess powder on the inner walls a cabin constructed with the wall elements according to the invention as in the Wall elements according to the prior art. This is particularly true compared to one Execution of the wall elements according to the prior art with spacers. There one observes that the spacers provided with large cross sections for reasons of stability lead to particularly strong powder accumulations because of the air in the core layer can circulate freely between these spacers and the field lines of the electrical field in the area of the spacers, so as to become undesirable strong accumulation of the electrically charged powder particles.

Ein weiterer Grund für die geringen Pulveransammlungen bei Einsatz von Wandelementen gemäß der Erfindung liegt darin, daß die Feldliniendichte bei größerer Wandstärke der Kabine, also bei langen Abstandhaltern, größer als bei kurzen Abstandhaltern ist. Zum Erreichen einer ausreichenden Stabilität ist aber eine Mindestlänge der Abstandhalter bzw. eine Mindestdicke einer Kernschicht aus Polyurethanschaum unvermeidbar. Diese Mindestdicke kann bei Einsatz der erfindungsgemäßen Wabenstruktur als Kernschicht um nahezu die Hälfte verringert werden. Another reason for the low powder accumulation when using wall elements according to the invention is that the field line density with greater wall thickness of the cabin, long spacers is larger than short spacers. To reach sufficient stability is a minimum length of the spacers or a minimum thickness a core layer of polyurethane foam is inevitable. This minimum thickness can reduced by almost half when using the honeycomb structure according to the invention as the core layer become.

Sowohl die Deckschichten als auch die Kernschicht mit Wabenstruktur sind vorzugsweise aus einem Kunststoffmaterial hergestellt, insbesondere aus PVC. Ein Wandelement gemäß der Erfindung hat die folgenden Vorteile:

  • geringe Wandstärke,
  • kleine Gesamtdicke,
  • hohe Stabilität,
  • geringes Gewicht,
  • minimierte Pulveransammlung.
Both the cover layers and the core layer with a honeycomb structure are preferably made from a plastic material, in particular from PVC. A wall element according to the invention has the following advantages:
  • low wall thickness,
  • small overall thickness,
  • high stability,
  • light weight,
  • minimized powder accumulation.

Diese Vorteile ergeben sich aus dem Einsatz einer Wabenstruktur als Kernschicht, welche zu der erheblich verringerten Gesamtdicke des Wandelements bei gleicher Stabilität führt. Folge der geringen Gesamtdicke ist die erwähnte reduzierte Pulveransammlung. Die Wabenstruktur führt ferner zu der genannten Gewichtsverringerung und damit auch zu einer Materialeinsparung.These advantages result from the use of a honeycomb structure as the core layer, which too the significantly reduced overall thickness of the wall element leads to the same stability. episode The reduced total powder thickness is the low total thickness. The honeycomb structure also leads to the reduction in weight mentioned and thus also to a saving in material.

Die Erfindung ist im folgenden an einem Ausführungsbeispiel mit weiteren Einzelheiten näher erläutert. Es zeigen:

Figur 1
einen Querschnitt durch ein herkömmliches Wandelement einer Pulverbeschichtungskabine mit Abstandhaltern zwischen zwei Deckschichten;
Figur 2
eine perspektivische Ansicht eines Wandelementes einer Pulverbeschichtungskabine mit einer Wabenstruktur gemäß der Erfindung als Kernschicht in einer ersten Ausführung.
The invention is explained in more detail below using an exemplary embodiment. Show it:
Figure 1
a cross section through a conventional wall element of a powder coating booth with spacers between two cover layers;
Figure 2
a perspective view of a wall element of a powder coating booth with a honeycomb structure according to the invention as a core layer in a first embodiment.

Das herkömmliche Wandelement gemäß Figur 1 hat eine äußere Deckschicht 2, eine innere Deckschicht 4 und eine Kernschicht 6 aus dazwischen in gleichmäßigen Abständen separat angeordneten Abstandhaltern 8.The conventional wall element according to FIG. 1 has an outer cover layer 2, an inner one Cover layer 4 and a core layer 6 separately therebetween at regular intervals arranged spacers 8.

Sowohl die beiden Deckschichten 2, 4 als auch die Abstandhalter 8 der Kernschicht 6 bestehen aus einem elektrisch nicht leitenden Kunststoff, wie PVC. Both the two cover layers 2, 4 and the spacers 8 of the core layer 6 exist made of an electrically non-conductive plastic, such as PVC.

In Figur 1 sind mit der Bezugszahl 10 Feldlinien eines elektrostatischen Feldes angedeutet, daß sich quer über das gezeigte Wandelement aufbaut, und zwar insbesondere im Bereich der Abstandhalter 8. Entsprechend bilden sich auf der Innenseite der Deckschicht 4 Ablagerungen aus den elektrisch geladenen Pulverpartikeln von Überschußpulver aus.In FIG. 1, 10 field lines of an electrostatic field are indicated with the reference number, that builds up across the wall element shown, especially in the area of Spacers 8. Correspondingly, 4 deposits form on the inside of the cover layer from the electrically charged powder particles from excess powder.

Figur 2 zeigt den Aufbau eines Wandelementes gemäß der Erfindung. Dort sind wiederum eine äußere Deckschicht 22 und eine innere Deckschicht 24 mit Abstand voneinander vorgesehen, wobei dieser Abstand durch eine zusammenhängende Kernschicht 26 aus einer zusammenhängenden Wabenstruktur mit Waben 28 überbrückt ist. Der Klarheit halber sind nur einige wenige Waben 28 dargestellt, die jedoch zusammenhängend den gesamten Zwischenraum zwischen den beiden Deckschichten 22 und 24 ausfüllen.Figure 2 shows the structure of a wall element according to the invention. There are again an outer cover layer 22 and an inner cover layer 24 are provided at a distance from one another, this distance being formed by a coherent core layer 26 from a coherent Honeycomb structure is bridged with honeycomb 28. For the sake of clarity only a few honeycombs 28 are shown, but the entire space is contiguous fill between the two cover layers 22 and 24.

Die Waben 28 der Wabenstruktur gemäß Fig. 2 sind mit ihren Hauptachsen normal zu den Deckschichten 22, 24 orientiert. Diese Ausrichtung der Wabenstruktur ist insofern vorteilhaft, als sie für höchste Stabilität bei geringster Wandstärke des Materials der Waben sorgen dürfte.The honeycombs 28 of the honeycomb structure according to FIG. 2 are normal to the main axes Cover layers 22, 24 oriented. This alignment of the honeycomb structure is advantageous in that than it should ensure maximum stability with the smallest wall thickness of the honeycomb material.

Wie bei dem bekannten Wandelement bestehen auch bei dem erfindungsgemäßen Wandelement gemäß Figur 2 sowohl die Deckschichten 22, 24als auch die Wabenstruktur 26der Kernschicht aus einem elektrisch nicht leitenden Kunststoff, beispielsweise aus PVC. Natürlich ist insbesondere für die Wabenstruktur ein anderer Werkstoff aus nicht leitendem Material denkbar.As with the known wall element, the wall element according to the invention also exists 2, both the cover layers 22, 24 and the honeycomb structure 26 of the core layer made of an electrically non-conductive plastic, for example PVC. of course is another material made of non-conductive material is conceivable in particular for the honeycomb structure.

Mit Wandelementen gemäß Figur 1läßt sich eine Kabine zur Pulverbeschichtung in beliebigen Größen aufbauen. Auch die Türen einer solchen Kabine können aus diesen Wandelementen bestehen, wobei solche Türen beispielsweise an den Stirnenden einer langgestreckten Kabine zum Durchschleusen von Werkstücken in Längsrichtung wie auch an den Seitenwänden für einen äußeren Handbeschichtungsplatz vorgesehen sein können.With wall elements according to FIG. 1, a booth can be powder coated in any way Build up sizes. The doors of such a cabin can also be made from these wall elements exist, such doors, for example, at the ends of an elongated Cabin for the passage of workpieces in the longitudinal direction as well as on the side walls can be provided for an external manual coating station.

Kabinen aus Wandelementen gemäß der Erfindung haben anders als bekannte Kabinen eine eckige Außengestalt. Cabins made of wall elements according to the invention, unlike known cabins, have one angular exterior.

Die Gesamtstärke der Wandelemente gemäß der Erfindung kann kleiner als die Wandstärke von bekannten Kabinen gehalten werden.The total thickness of the wall elements according to the invention can be smaller than the wall thickness are kept by well-known cabins.

Die in der vorstehenden Beschreibung, den Ansprüchen und der Zeichnung offenbarten Merkmale können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung in den verschiedenen Ausgestaltungen von Bedeutung sein.Those disclosed in the foregoing description, claims and drawings Features can be used individually as well as in any combination for the realization of the invention in the various configurations.

Claims (7)

Wandelement einer Kabine für elektrostatisches Pulverbeschichten mit einer inneren und einer äußeren Deckschicht (22, 24) aus elektrisch nicht leitendem Material sowie einer Kernschicht, dadurch gekennzeichnet, daß die Kernschicht eine zusammenhängende Wabenstruktur (26) aus einem elektrisch nicht leitenden Material bildet.Wall element of a booth for electrostatic powder coating with an inner and an outer cover layer (22, 24) made of electrically non-conductive material and a core layer, characterized in that the core layer forms a coherent honeycomb structure (26) made of an electrically non-conductive material. Wandelement nach Anspruch 1, dadurch gekennzeichnet, daß die Waben (28) der Wabenstruktur (26) polygonal sind.Wall element according to claim 1, characterized in that the honeycombs (28) of the honeycomb structure (26) are polygonal. Wandelement nach Anspruch 2, dadurch gekennzeichnet, daß die Waben (28) der Wabenstruktur sechseckig sind.Wall element according to claim 2, characterized in that the honeycombs (28) of the honeycomb structure are hexagonal. Wandelement nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Deckschichten (22, 24) und die Kernschicht (26) aus Kunststoff bestehen.Wall element according to one of claims 1 to 3, characterized in that the cover layers (22, 24) and the core layer (26) consist of plastic. Wandelement nach Anspruch 4, dadurch gekennzeichnet, daß die Deckschichten (22, 24) aus PVC bestehen.Wall element according to claim 4, characterized in that the cover layers (22, 24) consist of PVC. Wandelement nach Anspruch 4, dadurch gekennzeichnet, daß die Wabenstruktur (26) der Kernschicht aus PVC besteht.Wall element according to claim 4, characterized in that the honeycomb structure (26) of the core layer consists of PVC. Wandelement nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Hauptachsen der Waben (28) der Wabenstruktur (26) normal zu den Deckschichten (22, 24) verlaufen.Wall element according to one of claims 1 to 6, characterized in that the main axes of the honeycombs (28) of the honeycomb structure (26) run normal to the cover layers (22, 24).
EP02017537A 2001-08-31 2002-08-06 Wall comprising a honeycomb structure for an electrostatic powder coating booth Withdrawn EP1287903A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10142589A DE10142589A1 (en) 2001-08-31 2001-08-31 Wall element of a cabin for electrostatic powder coating
DE10142589 2001-08-31

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3254705A1 (en) * 2016-06-08 2017-12-13 B. Braun Melsungen AG Treatment chamber in lightweight construction

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0402604A2 (en) * 1989-06-15 1990-12-19 ITW Gema AG Device for electrostatic spray-coating with powder
FR2683747A1 (en) * 1991-11-20 1993-05-21 Azoulay Felix Booth for the electrostatic powder-coating of any article
US5277713A (en) * 1991-10-21 1994-01-11 Gema Volstatic Ag Cabin for spray coating objects with powder
DE4223819A1 (en) * 1992-07-20 1994-01-27 Gema Volstatic Ag St Gallen Electrostatic powder coating cabin - has separate electrically insulating material inside walls, made from polystyrene in polyurethane base sandwiched between PVC layers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1431893A (en) * 1965-02-05 1966-03-18 Societe D'etudes, De Coordination Et D'orientation Des Societes Du Groupe Gabriel Marly-S.E.C.O. Device for the protection against the deposit of paint, of the face of an object opposite to that which is to be painted by projection
US5259879A (en) * 1991-06-27 1993-11-09 Ransburg Corporation Powder application booth liner and method of making it

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0402604A2 (en) * 1989-06-15 1990-12-19 ITW Gema AG Device for electrostatic spray-coating with powder
US5277713A (en) * 1991-10-21 1994-01-11 Gema Volstatic Ag Cabin for spray coating objects with powder
FR2683747A1 (en) * 1991-11-20 1993-05-21 Azoulay Felix Booth for the electrostatic powder-coating of any article
DE4223819A1 (en) * 1992-07-20 1994-01-27 Gema Volstatic Ag St Gallen Electrostatic powder coating cabin - has separate electrically insulating material inside walls, made from polystyrene in polyurethane base sandwiched between PVC layers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3254705A1 (en) * 2016-06-08 2017-12-13 B. Braun Melsungen AG Treatment chamber in lightweight construction

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DE10142589A1 (en) 2003-04-17
CA2398505A1 (en) 2003-02-28

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