CA2398505A1 - A wall member for a cabin for electrostatic powder coating - Google Patents
A wall member for a cabin for electrostatic powder coating Download PDFInfo
- Publication number
- CA2398505A1 CA2398505A1 CA002398505A CA2398505A CA2398505A1 CA 2398505 A1 CA2398505 A1 CA 2398505A1 CA 002398505 A CA002398505 A CA 002398505A CA 2398505 A CA2398505 A CA 2398505A CA 2398505 A1 CA2398505 A1 CA 2398505A1
- Authority
- CA
- Canada
- Prior art keywords
- wall member
- core layer
- cabin
- cover layers
- honeycomb structure
- 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.)
- Abandoned
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
- B05B16/00—Spray booths
- B05B16/40—Construction elements specially adapted therefor, e.g. floors, walls or ceilings
Abstract
A wall member of a cabin for electrostatic powder coating, comprising inner and outer cover layers (22, 24) made of electrically non-conductive material, as well as a core layer wherein the core layer presents an integral honeycomb structu-re (26)of interconnected honeycombs made of an electrically non-conductive material.
Description
A wall member of a cabin for electrostatic powder coating.
The instant invention relates to a wall member of a cabin for electrostatic powder coating, comprising inner and outer cover layers of electrically non-conductive material, as well as a core layer.
Such wall members may be used to build modular cabins of dif-ferent dimensions for purposes of powder coating, as described in EP 0 588 003 Bl, for example. The wall members specified in that publication have a core layer made of polyurethane foam covered by outer and inner cover layers of polyvinyl chloride (PVC). Additionally, an electrically conductive separating layer may be provided between the core layer and one of the two cover layers. The continuous or integral core layer may be substituted by individual spacers arranged at regular spac-ings.
From U.S. Patent 5,259,879, granted to Khattab et al. on No-vember 9, 1993 a wall member of a powder coating cabin is known which consists of inner and outer thermoplastic layers and a core layer made of thermoformed circular or bubble-like spacers which are arranged with a distance from each other so that air can freely circulate within the core layer.
It is an object of the invention to provide for a wall member for modular construction of a cabin for electrostatic powder coating which will minimize the depositing of powder within the cabin and permit reducing the wall thickness as compared to that of a cabin according to the state of the art.
This object is met by claim 1.
The instant invention relates to a wall member of a cabin for electrostatic powder coating, comprising inner and outer cover layers of electrically non-conductive material, as well as a core layer.
Such wall members may be used to build modular cabins of dif-ferent dimensions for purposes of powder coating, as described in EP 0 588 003 Bl, for example. The wall members specified in that publication have a core layer made of polyurethane foam covered by outer and inner cover layers of polyvinyl chloride (PVC). Additionally, an electrically conductive separating layer may be provided between the core layer and one of the two cover layers. The continuous or integral core layer may be substituted by individual spacers arranged at regular spac-ings.
From U.S. Patent 5,259,879, granted to Khattab et al. on No-vember 9, 1993 a wall member of a powder coating cabin is known which consists of inner and outer thermoplastic layers and a core layer made of thermoformed circular or bubble-like spacers which are arranged with a distance from each other so that air can freely circulate within the core layer.
It is an object of the invention to provide for a wall member for modular construction of a cabin for electrostatic powder coating which will minimize the depositing of powder within the cabin and permit reducing the wall thickness as compared to that of a cabin according to the state of the art.
This object is met by claim 1.
-2-Advantageous modifications of the invention are recited in the dependent claims.
A cabin made of wall members according to the invention has a core layer which consists of an integral honeycomb structure, whereby maximum stability is warranted at much lower overall thickness than is the case with the known wall member. The in-terconnected honeycombs of the honeycomb structure, preferably have their primary axes oriented at right angles to the cover layers, and are characterized by a very thin wall thickness.
And yet they offer sufficient supporting strength for the cover layers of which the wall thickness is very thin.
A particular advantage of the invention is obtained due to the fact that the honeycomb structure according to the invention prevents the exchange of air within the core layer and thus minimizes the resulting local static charging of the wall mem-ber.
In comparison with the air volume trapped between the cover layers, only a minor proportion of honeycomb material is dis-posed between the cover layers. Tests have shown that, as a consequence thereof, much less excess powder accumulates on the interior walls of a cabin made of wall members according to the invention than is the case with conventional wall mem-bers. This is true, in particular, in comparison with an em-bodiment of known wall members which include spacers. With such wall members it was observed that the spacers, given their large cross sectional surface area for reasons of sta-bility, lead to especially great accumulations of powder be-cause air can freely circulate within the core layer and the lines of flux of the electric field are concentrated in the area of the spacers, thereby provoking undesirably great de-posits of electrically charged powder particles.
_3_ Another reason why the use of wall members according to the invention causes only minor accumulations of powder is to be seen in the fact that the density of the lines of flux is greater with a greater wall thickness of the cabin, in other words with long spacers,y.than it is when short spacers are provided. However, a certain minimum length of spacersyor a minimum thickness of a core layer consisting of polyurethane foam is unavoidable in order to achieve sufficient stability.
Providing an integral honeycomb structure as the core layer can cut this minimum thickness by almost one half.
Both the cover layers and the core layer with its honeycomb structure preferably are made of plastics, especially of PVC.
A wall member according to the invention has the following ad-vantages:
- small wall thickness - small total thickness - high stability - low weight - minimized powder accumulation.
These advantages are derived from the use of an integral hon-eycomb structure as the core layer which affords the consid-erably reduced overall thickness of the wall member while re-taining its stability. As a consequence of the small wall thickness, reduced amounts of powder will deposit, as already mentioned. Furthermore, the honeycomb structure affords the weight reduction mentioned and thus also contributes to saving building material.
The invention will be described further, by way of example, with reference to the accompanying drawings, in which:
Fig. 1 is a cross sectional elevation of a conventional wall member for a powder coating cabin, including spacers between two cover layers;
Fig. 2 is a perspective view of a wall member according to the invention, comprising an integral honeycomb structure as the core layer in a first embodiment.
The conventional wall member shown in fig. 1 has an outer cover layer 2, an inner cover layer 4, and a core layer 6 con-sisting of individually disposed spacers 8 which are arranged at regular spacings between the cover layers.
The two cover layers 2, 4 as well as the spacers 8 of the core layer 6 are made of a kind of plastics which is not electric-ally conductive, such as PVC.
Reference numeral 10 in fig. 1 indicates lines of flux of an electrostatic field building up across the wall member il-lustrated, particularly so in the area of the spacers 8. De-posits of electrically charged powder particles of excess pow-der accumulate accordingly at the inner side of the cover layer 4.
Fig. 2 illustrates the structure of a wall member according to the invention. Again, an outer cover layer 22 and an inner cover layer 24 are provided spaced from each other. The spac-ing is bridged by a continuous core layer 26 consisting of an integral honeycomb structure comprising honeycombs 28. For reasons of clarity, only a few honeycombs 28 are illustrated;
they are interconnected and fill the entire space between the two cover layers 22 and 24.
The honeycombs 28 of the honeycomb structure according to fig.
2 are oriented with their principal axes at right angles to the cover layers 22, 24. This orientation of the honeycomb _j_ structure is advantageous as it should provide maximum sta-bility at minimum wall thickness of the material of the honey-combs.
As with the known wall member, also the wall element according to the invention, shown in fig. 2, has the cover layers 22, 24 and the honeycomb structure 26 of the core layer made of elec-trically non-conductive plastics, for example PVC. Of course, some other non-conductive material is conceivable as well, particularly for the honeycomb structure.
Cabins for powder coating of any desired dimensions may be built of wall members such as shown in the drawing. Also the doors of such cabin may be made of this type of wall members.
Doors may be located, for instance, at the ends of an elon-gated cabin to permit passage of workpieces in longitudinal direction through the cabin; or they may be provided in the lateral walls for an outside manual coating station.
Other than known cabins, cabins composed of wall members ac-cording to the invention are angular in external shape.
The total thickness of wall members according to the invention may be made smaller than the wall thickness of known cabins.
The features disclosed in the specification above, in the claims, and drawing may be significant for implementing the invention in its various embodiments, bath individually and in any combination.
A cabin made of wall members according to the invention has a core layer which consists of an integral honeycomb structure, whereby maximum stability is warranted at much lower overall thickness than is the case with the known wall member. The in-terconnected honeycombs of the honeycomb structure, preferably have their primary axes oriented at right angles to the cover layers, and are characterized by a very thin wall thickness.
And yet they offer sufficient supporting strength for the cover layers of which the wall thickness is very thin.
A particular advantage of the invention is obtained due to the fact that the honeycomb structure according to the invention prevents the exchange of air within the core layer and thus minimizes the resulting local static charging of the wall mem-ber.
In comparison with the air volume trapped between the cover layers, only a minor proportion of honeycomb material is dis-posed between the cover layers. Tests have shown that, as a consequence thereof, much less excess powder accumulates on the interior walls of a cabin made of wall members according to the invention than is the case with conventional wall mem-bers. This is true, in particular, in comparison with an em-bodiment of known wall members which include spacers. With such wall members it was observed that the spacers, given their large cross sectional surface area for reasons of sta-bility, lead to especially great accumulations of powder be-cause air can freely circulate within the core layer and the lines of flux of the electric field are concentrated in the area of the spacers, thereby provoking undesirably great de-posits of electrically charged powder particles.
_3_ Another reason why the use of wall members according to the invention causes only minor accumulations of powder is to be seen in the fact that the density of the lines of flux is greater with a greater wall thickness of the cabin, in other words with long spacers,y.than it is when short spacers are provided. However, a certain minimum length of spacersyor a minimum thickness of a core layer consisting of polyurethane foam is unavoidable in order to achieve sufficient stability.
Providing an integral honeycomb structure as the core layer can cut this minimum thickness by almost one half.
Both the cover layers and the core layer with its honeycomb structure preferably are made of plastics, especially of PVC.
A wall member according to the invention has the following ad-vantages:
- small wall thickness - small total thickness - high stability - low weight - minimized powder accumulation.
These advantages are derived from the use of an integral hon-eycomb structure as the core layer which affords the consid-erably reduced overall thickness of the wall member while re-taining its stability. As a consequence of the small wall thickness, reduced amounts of powder will deposit, as already mentioned. Furthermore, the honeycomb structure affords the weight reduction mentioned and thus also contributes to saving building material.
The invention will be described further, by way of example, with reference to the accompanying drawings, in which:
Fig. 1 is a cross sectional elevation of a conventional wall member for a powder coating cabin, including spacers between two cover layers;
Fig. 2 is a perspective view of a wall member according to the invention, comprising an integral honeycomb structure as the core layer in a first embodiment.
The conventional wall member shown in fig. 1 has an outer cover layer 2, an inner cover layer 4, and a core layer 6 con-sisting of individually disposed spacers 8 which are arranged at regular spacings between the cover layers.
The two cover layers 2, 4 as well as the spacers 8 of the core layer 6 are made of a kind of plastics which is not electric-ally conductive, such as PVC.
Reference numeral 10 in fig. 1 indicates lines of flux of an electrostatic field building up across the wall member il-lustrated, particularly so in the area of the spacers 8. De-posits of electrically charged powder particles of excess pow-der accumulate accordingly at the inner side of the cover layer 4.
Fig. 2 illustrates the structure of a wall member according to the invention. Again, an outer cover layer 22 and an inner cover layer 24 are provided spaced from each other. The spac-ing is bridged by a continuous core layer 26 consisting of an integral honeycomb structure comprising honeycombs 28. For reasons of clarity, only a few honeycombs 28 are illustrated;
they are interconnected and fill the entire space between the two cover layers 22 and 24.
The honeycombs 28 of the honeycomb structure according to fig.
2 are oriented with their principal axes at right angles to the cover layers 22, 24. This orientation of the honeycomb _j_ structure is advantageous as it should provide maximum sta-bility at minimum wall thickness of the material of the honey-combs.
As with the known wall member, also the wall element according to the invention, shown in fig. 2, has the cover layers 22, 24 and the honeycomb structure 26 of the core layer made of elec-trically non-conductive plastics, for example PVC. Of course, some other non-conductive material is conceivable as well, particularly for the honeycomb structure.
Cabins for powder coating of any desired dimensions may be built of wall members such as shown in the drawing. Also the doors of such cabin may be made of this type of wall members.
Doors may be located, for instance, at the ends of an elon-gated cabin to permit passage of workpieces in longitudinal direction through the cabin; or they may be provided in the lateral walls for an outside manual coating station.
Other than known cabins, cabins composed of wall members ac-cording to the invention are angular in external shape.
The total thickness of wall members according to the invention may be made smaller than the wall thickness of known cabins.
The features disclosed in the specification above, in the claims, and drawing may be significant for implementing the invention in its various embodiments, bath individually and in any combination.
Claims (7)
1. A wall member of a cabin for electrostatic powder coating, comprising inner and outer cover layers (22, 24) made of elec-trically non-conductive material, as well as a core layer, wherein the core layer is an integral honeycomb structure (26) formed of interconnected honeycombs of electrically non-conductive material.
2. The wall member as claimed in claim 1, wherein the inter-connected honeycombs (28) of the honeycomb structure (26) are polygonal.
3. The wall member as claimed in claim 2, wherein the inter-connected honeycombs (28) of the honeycomb structure are hex-agonal.
4. The wall member as claimed in any one of claims 1 to 3, wherein the cover layers (22, 24) and the core layer (26) are made of plastics.
5. The wall member as claimed in claim 4, wherein the cover layers (22, 24) are made of PVC.
6. The wall member as claimed in claim 4, wherein the honey-comb structure (26) of the core layer is made of PVC.
7. The wall member as claimed in any one of claim 1, wherein the primary axes of the interconnected honeycombs (28) of the honeycomb structure (26) extend at right angles to the cover layers (22, 24).
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 |
| DE10142589.9 | 2001-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2398505A1 true CA2398505A1 (en) | 2003-02-28 |
Family
ID=7697178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002398505A Abandoned CA2398505A1 (en) | 2001-08-31 | 2002-08-15 | A wall member for a cabin for electrostatic powder coating |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1287903A1 (en) |
| CA (1) | CA2398505A1 (en) |
| DE (1) | DE10142589A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016110572A1 (en) * | 2016-06-08 | 2017-12-14 | B. Braun Melsungen Ag | Medical-technical treatment chamber in lightweight construction |
Family Cites Families (6)
| 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 |
| DE3919614A1 (en) * | 1989-06-15 | 1990-12-20 | Gema Ransburg Ag | SYSTEM FOR ELECTROSTATIC SPRAY COATING WITH POWDER |
| US5259879A (en) * | 1991-06-27 | 1993-11-09 | Ransburg Corporation | Powder application booth liner and method of making it |
| DE4134702A1 (en) * | 1991-10-21 | 1993-04-22 | Gema Volstatic Ag | CAB FOR SPRAY COATING OBJECTS WITH POWDER |
| FR2683747B1 (en) * | 1991-11-20 | 1994-03-04 | Azoulay Felix | CAB FOR ELECTROSTATIC POWDERING OF ANY PARTS. |
| 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 |
-
2001
- 2001-08-31 DE DE10142589A patent/DE10142589A1/en not_active Withdrawn
-
2002
- 2002-08-06 EP EP02017537A patent/EP1287903A1/en not_active Withdrawn
- 2002-08-15 CA CA002398505A patent/CA2398505A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| DE10142589A1 (en) | 2003-04-17 |
| EP1287903A1 (en) | 2003-03-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |