CA1103101A - Apparatus and method for electrostatically powderspraying, particularly of enamel - Google Patents
Apparatus and method for electrostatically powderspraying, particularly of enamelInfo
- Publication number
- CA1103101A CA1103101A CA289,885A CA289885A CA1103101A CA 1103101 A CA1103101 A CA 1103101A CA 289885 A CA289885 A CA 289885A CA 1103101 A CA1103101 A CA 1103101A
- Authority
- CA
- Canada
- Prior art keywords
- powder
- enamel
- air
- spray apparatus
- reservoir
- 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.)
- Expired
Links
- 210000003298 dental enamel Anatomy 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 64
- 229940098458 powder spray Drugs 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 239000007921 spray Substances 0.000 claims description 13
- 239000003086 colorant Substances 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 16
- 238000009434 installation Methods 0.000 abstract description 9
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 5
- 239000000725 suspension Substances 0.000 abstract description 3
- 239000002923 metal particle Substances 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 22
- 239000000049 pigment Substances 0.000 description 6
- 230000005484 gravity Effects 0.000 description 4
- 239000001023 inorganic pigment Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D5/00—Coating with enamels or vitreous layers
- C23D5/04—Coating with enamels or vitreous layers by dry methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
- B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
- B05B14/48—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths specially adapted for particulate material
Abstract
ABSTRACT
Powder spray operation for electrostatically spraying inorganic powders such as enamel suspensions up till now was only possible by increasing the electrical resistance by coating the particles with an organic coating, but because of the considerable hardness of the enamel powder particles an unacceptable wear in the recovery installations, especially in the exhaust system, transport system and cyclone was developed when spraying this powder in an apparatus which was known per se for the organic powder spraying operation whereby the not deposited powder was returned to a recuperation installation.
It has been tried to adapt this method for inorganic powders, but the organic coating of the particles was damaged and the powder was polluted by abraded metal particles, so that strong undesired changes of color of the enamel surface were caused after being passed through the furnace in spite of extensive cleaning operations. All this problems have been solved by embodying the powder recirculation completely within a powder spray module having filtering devices and a reservoir which are preferably simply exchangeable which reduces the number of necessary modules.
Powder spray operation for electrostatically spraying inorganic powders such as enamel suspensions up till now was only possible by increasing the electrical resistance by coating the particles with an organic coating, but because of the considerable hardness of the enamel powder particles an unacceptable wear in the recovery installations, especially in the exhaust system, transport system and cyclone was developed when spraying this powder in an apparatus which was known per se for the organic powder spraying operation whereby the not deposited powder was returned to a recuperation installation.
It has been tried to adapt this method for inorganic powders, but the organic coating of the particles was damaged and the powder was polluted by abraded metal particles, so that strong undesired changes of color of the enamel surface were caused after being passed through the furnace in spite of extensive cleaning operations. All this problems have been solved by embodying the powder recirculation completely within a powder spray module having filtering devices and a reservoir which are preferably simply exchangeable which reduces the number of necessary modules.
Description
3i~
The 1nvention relates to a powder spray apparatus substantiallycomprising a booth with a reservoir in which powder is dispersed in air, a powder feed tube, a spray gun in which the powder is electrically charged and sprayed toward the work-piece, an exhaust system, a system with a fan and a filtering device to return the powder.
Electrostatically powder~spraying of organic powders is a method which has generally been applied for the last 10 years. Apparatus for said method are described in the patents, namely Nordson, Gema (USP 3 918 641), Sames (F.P. 1 337 069) and the ~utch principal patent no. 82 716 of Metallgesellschaft.
It is the object of the method according to the above-mentioned patents to achieve, by automatically returning the powder, which is not deposited on the work-piece to be coated, to the reservoir, a saving in use of powder and labour expenses.
Still another advantage is that air pollution is strongly opposed.
An apparatus according to the known methods consists of a hopper in which the powder is dispersed in air, a powder feed tube, a spray gun in which the powder is electrically charged and sprayed toward the work-piece a booth in which the spray gun and the workpiece are provided, an exhaust system a-t the bottom side of said booth, a transport system to return the powder-air mixture to the recuperation installation, a recovery system consisting of a cyclone and a filtering device to separate the powder from the air and of a transport system to return the recuperated powder to the hopper again.
Electrostatically spraying enamel suspensions is also a method which has been applied for a long time. In said method the enamel together with clay, water, settling salt and inorganic pigments -- 1-- ~
is milled and the obtained suspension is sprayed onto the work-piece. A disadvantage of said method i5, however, that the material, which does not arrive on the work-piece deposites on the ]bottom of the spray booth and in the air filtering installation. Said material must be manually collected at the end of a working day, or during the change of color, it has to be milled again with clay, water and settling salts and after being sieved it has to be added to a fresh milling. So, aut~matically recuperation is impossible with said method.
A method, analogous to the above described method for organic powders will therefore also provide considerable savings and advantages for inorganic powders. Electrostatically spraying dry ground enamel powders appeared, however, to be impossible.
Because of the considerably lower electrical resistance, when comparing with organic powders (organic powder 1 x 10 ohm/cm enamel powder 1 x 10 ohm/cm), it was not possible to maintain the charge on the p4wder particles, because of which the powder adherence was insufficient.
.
only when coating the enamel particle~s with an organic coating (Dutch patent application 75 05337) it was possible to increase the electrical resistance such that the adherence of the enamel powder remained sufficient up to within the enamel furnace. As apparatus for said method an apparatus was used, which is known per se for the organic powder spraying operation, in which only at the location where high air velocities are developed, as for instance in the venturies of the powder pump and in the spray gun, the usual soft materials like P.T.F.E. were replaced by more wear resistant material like for instance tool steel or ceramic material. The latter was necessary because the considerably higher hardness of enamel particles (hardness 6 according to the Mohs-scale) with respect to organic powder particles (hardness 3 according to the Mohs-scale) caused too much wear. In practice ~3iQi said apparatus for powder spraying inorganic powder appeared to involve considerable disadvantages.
Because of the above-mentioned considerable hardness of the enamel powder particles an unacceptable wear in the recovery installations, especially in the exhaust system, transport system, and cyclone is developed. Moreover, the powder is polluted by the abraded metal particles, causing a strong undesired change of color of the enamel surface after being passed through the furnace.
Another disadvantage of abraising the enamel particles against the walls of the recovery installation is further that the organic coating, which has a thickness of only 0.001~ is damaged, because of which the electric resistance and consequently the powder adherence is strongly decreased.
The method applied in the usual "wet" enamel techniques r according to which the enamel is milled together with the inorganic pigment, neither seems to be transferable to these installations.
When the enamel and the inorganic pigment are dry milled and then sprayed in a device suitable for organic powder spray operations it appears that a portion of the inorganic pigment disappeared from the recirculated powder and that the remaining portion of the pigment is no longer homogeneously distributed. These losses and demixtures can be explained on the basis of the differences in particle sizes and specific gravity of enamel and pigment particles.
Enamel: specific gravity + 2.60 - particle size 95~ between 5-70~.
Pigment: dependent on the type of pigment - specific gravity varying from 4.0 IO 7.0~ - particle size 100~5~.
~03~1 The collection efficiency of the cyclones in the usual recovery installations for organic powders having a particle si~e of 95~
between 20-40~ is not sufficient for the less coarse inorganic r powder systems.
It is the object of the present invention to provide an apparatus and a method for electrostatically powder spraying inorganic powder systems, in which all the above-mentioned disadvantages, which occur during the use of the methods and apparatus for organic powder spraying, which are known up to now, are avoided.
It is an other object of the invention to provide an apparatus and a method having the possibility to change quickly of color without the danger of pollution and without extensive cleaning operations.
The apparatus according to the present invention is embodied such that the powder recirculation takes place completely within the powder spray module.
The filtering devices and the reservoir are preferably simply exchangeable as the cleaning of said parts takes more time than the cleaning of the remaining parts of the module. So, said property of the invention reduces the number of necessary modules.
The exhaust air is blown back through the filtering devices via air seals substantially such that an inwardly directed jet is developed. The advantage hereof is that the air condition in the module as for instance the air moisture contents is kept constant. The relative humidity of the air influences the depositing velocity and the adherence of the enamel powder on the work-piece.
_~_ ,.. : . . ~ ,i.
Another advantage of such an apparatus is that an air treatment installation for the ambient air is not necessary and can be left out.
When, as is preferably the case, the guide of the spray guns be arranged in the module itself. only narrow slot openings are necessary to guide the work-piece through the module.
Such a module can be applied most efficiently in a method which is characterized in that the articles to be sprayed are moved along the spray guns by means of a conveyor.
The apparatus will be further elucidated on the basis of the enclosed drawing. In the drawing:
fig. 1 shows a schematic top view of the interior of a module according to the inventioni and fig. 2 shows a cross section according to the line II-II of figure 1.
The bottom of the powder spray booth 1 consists of a reservoir 13 in which the powder is dispersed with air and via a powder feed tube 7 and the spray gun 2, in which the powder is electro-statically charged, it is sprayed toward the work-piece 3. The powder, which is not deposited on the work-piece, will, for the greater part, fall back into the reservoir 13 under the influence of gravity.
In order to take care of the fact that the powder, which does not fall back directly, can leave the mo-dule via the entrance and exit openings 6, a slight under-pressure is provided in the module by exhausting air by the fans 5 via the filtering elements 4. The powder collected by the filter is periodically blown in 3~
the opposite direction of the filters by means of a pressure blow.
The air sucked by the fans 5 is partially blo~ back into the module via the slots at both sides of the entrance and exit openings 6, by which an inwardly directed air jet is developed taking care of the fact, that no powder particles, which float in the module itself can escape via the openings.
The guide 8 along which the guns can be moved up and down, is arranged within the module, so that no openings for guns andpowder supply tubes, which can not be easily sealed, are created, and the escape of powder along said track is prevented.
The dispersion ofpowderin the air is effected by a pump 11 and results in a so-called fluidized bed ofpowderin the reservoir.
By the features as described above the quantity of air which has to be exhausted via the filtering elements 4 is so small that in comparison with the known apparatus both the number of filters and the charge per filter can be considerably reduced.
For organic powders a rather high air displacement must be maintained to reduce the danger of explosion.
Because of said low charge per filter the alternately periodically cleaning by means of a blow a pressurised air and returning the air via the slots the recuperation efficiency is also very high for very fine powders, as is usual in inorganic enamel pigment systems.
The apparatus according to the invention provides good advantages over the above-described apparatus for the organic powder spraying operation.
Because the enamel and pigment particles can no longer contact the metal walls of the transport and recuperation systems at a ~ ~ w ~ -6-~1~3~
high velocity, the mechanic wear of the recuperation system is prevented. The reduction in quality of the enamel powder by pollution and the loss of powder adherence is avoided in said apparatus as well.
Because of the simple and cheap construction it is possible in case of changing color, to quickly change the module by simply uncoupling fans, the motion mechanism and the pressurised air conducts. A module destined for another color is driven in and connected, after which the production is immediately continued without the time-devouring cleaning of the module and recuperation system.
The above described modules seem to be most suitable for proauction increase and for the application of "2-coat -one fire" by placing the modules one behind the other.
The 1nvention relates to a powder spray apparatus substantiallycomprising a booth with a reservoir in which powder is dispersed in air, a powder feed tube, a spray gun in which the powder is electrically charged and sprayed toward the work-piece, an exhaust system, a system with a fan and a filtering device to return the powder.
Electrostatically powder~spraying of organic powders is a method which has generally been applied for the last 10 years. Apparatus for said method are described in the patents, namely Nordson, Gema (USP 3 918 641), Sames (F.P. 1 337 069) and the ~utch principal patent no. 82 716 of Metallgesellschaft.
It is the object of the method according to the above-mentioned patents to achieve, by automatically returning the powder, which is not deposited on the work-piece to be coated, to the reservoir, a saving in use of powder and labour expenses.
Still another advantage is that air pollution is strongly opposed.
An apparatus according to the known methods consists of a hopper in which the powder is dispersed in air, a powder feed tube, a spray gun in which the powder is electrically charged and sprayed toward the work-piece a booth in which the spray gun and the workpiece are provided, an exhaust system a-t the bottom side of said booth, a transport system to return the powder-air mixture to the recuperation installation, a recovery system consisting of a cyclone and a filtering device to separate the powder from the air and of a transport system to return the recuperated powder to the hopper again.
Electrostatically spraying enamel suspensions is also a method which has been applied for a long time. In said method the enamel together with clay, water, settling salt and inorganic pigments -- 1-- ~
is milled and the obtained suspension is sprayed onto the work-piece. A disadvantage of said method i5, however, that the material, which does not arrive on the work-piece deposites on the ]bottom of the spray booth and in the air filtering installation. Said material must be manually collected at the end of a working day, or during the change of color, it has to be milled again with clay, water and settling salts and after being sieved it has to be added to a fresh milling. So, aut~matically recuperation is impossible with said method.
A method, analogous to the above described method for organic powders will therefore also provide considerable savings and advantages for inorganic powders. Electrostatically spraying dry ground enamel powders appeared, however, to be impossible.
Because of the considerably lower electrical resistance, when comparing with organic powders (organic powder 1 x 10 ohm/cm enamel powder 1 x 10 ohm/cm), it was not possible to maintain the charge on the p4wder particles, because of which the powder adherence was insufficient.
.
only when coating the enamel particle~s with an organic coating (Dutch patent application 75 05337) it was possible to increase the electrical resistance such that the adherence of the enamel powder remained sufficient up to within the enamel furnace. As apparatus for said method an apparatus was used, which is known per se for the organic powder spraying operation, in which only at the location where high air velocities are developed, as for instance in the venturies of the powder pump and in the spray gun, the usual soft materials like P.T.F.E. were replaced by more wear resistant material like for instance tool steel or ceramic material. The latter was necessary because the considerably higher hardness of enamel particles (hardness 6 according to the Mohs-scale) with respect to organic powder particles (hardness 3 according to the Mohs-scale) caused too much wear. In practice ~3iQi said apparatus for powder spraying inorganic powder appeared to involve considerable disadvantages.
Because of the above-mentioned considerable hardness of the enamel powder particles an unacceptable wear in the recovery installations, especially in the exhaust system, transport system, and cyclone is developed. Moreover, the powder is polluted by the abraded metal particles, causing a strong undesired change of color of the enamel surface after being passed through the furnace.
Another disadvantage of abraising the enamel particles against the walls of the recovery installation is further that the organic coating, which has a thickness of only 0.001~ is damaged, because of which the electric resistance and consequently the powder adherence is strongly decreased.
The method applied in the usual "wet" enamel techniques r according to which the enamel is milled together with the inorganic pigment, neither seems to be transferable to these installations.
When the enamel and the inorganic pigment are dry milled and then sprayed in a device suitable for organic powder spray operations it appears that a portion of the inorganic pigment disappeared from the recirculated powder and that the remaining portion of the pigment is no longer homogeneously distributed. These losses and demixtures can be explained on the basis of the differences in particle sizes and specific gravity of enamel and pigment particles.
Enamel: specific gravity + 2.60 - particle size 95~ between 5-70~.
Pigment: dependent on the type of pigment - specific gravity varying from 4.0 IO 7.0~ - particle size 100~5~.
~03~1 The collection efficiency of the cyclones in the usual recovery installations for organic powders having a particle si~e of 95~
between 20-40~ is not sufficient for the less coarse inorganic r powder systems.
It is the object of the present invention to provide an apparatus and a method for electrostatically powder spraying inorganic powder systems, in which all the above-mentioned disadvantages, which occur during the use of the methods and apparatus for organic powder spraying, which are known up to now, are avoided.
It is an other object of the invention to provide an apparatus and a method having the possibility to change quickly of color without the danger of pollution and without extensive cleaning operations.
The apparatus according to the present invention is embodied such that the powder recirculation takes place completely within the powder spray module.
The filtering devices and the reservoir are preferably simply exchangeable as the cleaning of said parts takes more time than the cleaning of the remaining parts of the module. So, said property of the invention reduces the number of necessary modules.
The exhaust air is blown back through the filtering devices via air seals substantially such that an inwardly directed jet is developed. The advantage hereof is that the air condition in the module as for instance the air moisture contents is kept constant. The relative humidity of the air influences the depositing velocity and the adherence of the enamel powder on the work-piece.
_~_ ,.. : . . ~ ,i.
Another advantage of such an apparatus is that an air treatment installation for the ambient air is not necessary and can be left out.
When, as is preferably the case, the guide of the spray guns be arranged in the module itself. only narrow slot openings are necessary to guide the work-piece through the module.
Such a module can be applied most efficiently in a method which is characterized in that the articles to be sprayed are moved along the spray guns by means of a conveyor.
The apparatus will be further elucidated on the basis of the enclosed drawing. In the drawing:
fig. 1 shows a schematic top view of the interior of a module according to the inventioni and fig. 2 shows a cross section according to the line II-II of figure 1.
The bottom of the powder spray booth 1 consists of a reservoir 13 in which the powder is dispersed with air and via a powder feed tube 7 and the spray gun 2, in which the powder is electro-statically charged, it is sprayed toward the work-piece 3. The powder, which is not deposited on the work-piece, will, for the greater part, fall back into the reservoir 13 under the influence of gravity.
In order to take care of the fact that the powder, which does not fall back directly, can leave the mo-dule via the entrance and exit openings 6, a slight under-pressure is provided in the module by exhausting air by the fans 5 via the filtering elements 4. The powder collected by the filter is periodically blown in 3~
the opposite direction of the filters by means of a pressure blow.
The air sucked by the fans 5 is partially blo~ back into the module via the slots at both sides of the entrance and exit openings 6, by which an inwardly directed air jet is developed taking care of the fact, that no powder particles, which float in the module itself can escape via the openings.
The guide 8 along which the guns can be moved up and down, is arranged within the module, so that no openings for guns andpowder supply tubes, which can not be easily sealed, are created, and the escape of powder along said track is prevented.
The dispersion ofpowderin the air is effected by a pump 11 and results in a so-called fluidized bed ofpowderin the reservoir.
By the features as described above the quantity of air which has to be exhausted via the filtering elements 4 is so small that in comparison with the known apparatus both the number of filters and the charge per filter can be considerably reduced.
For organic powders a rather high air displacement must be maintained to reduce the danger of explosion.
Because of said low charge per filter the alternately periodically cleaning by means of a blow a pressurised air and returning the air via the slots the recuperation efficiency is also very high for very fine powders, as is usual in inorganic enamel pigment systems.
The apparatus according to the invention provides good advantages over the above-described apparatus for the organic powder spraying operation.
Because the enamel and pigment particles can no longer contact the metal walls of the transport and recuperation systems at a ~ ~ w ~ -6-~1~3~
high velocity, the mechanic wear of the recuperation system is prevented. The reduction in quality of the enamel powder by pollution and the loss of powder adherence is avoided in said apparatus as well.
Because of the simple and cheap construction it is possible in case of changing color, to quickly change the module by simply uncoupling fans, the motion mechanism and the pressurised air conducts. A module destined for another color is driven in and connected, after which the production is immediately continued without the time-devouring cleaning of the module and recuperation system.
The above described modules seem to be most suitable for proauction increase and for the application of "2-coat -one fire" by placing the modules one behind the other.
Claims (8)
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A powder spray apparatus comprising a spray booth with entrance and exit openings to permit the passage of the articles to be coated, and a reservoir in which powder is dispersed in air to form a fluidized bed, a powder supply pump connected by tubes to the reservoir and at least one spray gun in which the powder is electrically charged and sprayed toward a work piece to be coated, an exhaust system with a fan and at least one filtering device to collect powder which has not reached the work piece or has not immediately fallen back into the reservoir, wherein the booth, supply pump, spray guns arranged on at least one guide, the exhaust system and connecting tubes are united in a powder spray module in which inorganic powder is recirculated.
2. A powder spray apparatus according to claim 1 in which at least one filtering device and the reservoir are adapted to be exchanged.
3. A powder spray apparatus according to claim 1 or 2, in which the air exhausted by at least the one filtering device is blown back via air seals at the entrance and exit openings of the module such that an inwardly directed air jet is developed.
4. A powder spray apparatus according to claim 1 or 2, in which the complete module may be exchanged by uncoupling the air duct to and from the fans and the motion mechanism of the spray guns.
5. A powder spray apparatus according to claim 1 in which the work-piece or a plurality of workpieces to be sprayed are moved past the spray gun or guns by a conveyor.
6. A powder spray apparatus according to claim 5, in which means are provided for periodically cleaning the filtering devices by pressurised air blown in the opposite direction to the flow of media to be filtered.
7. A powder spray apparatus according to claim 5 in which a plurality of apparatuses are arranged along the conveyor.
8. A powder spray apparatus according to claim 7 for use in electro-statically spraying enamel powder of two different colours.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7612089 | 1976-11-01 | ||
| NL7612089A NL7612089A (en) | 1976-11-01 | 1976-11-01 | APPARATUS AND METHOD FOR ELECTROSTATIC POWDER SPRAY, IN PARTICULAR EMAIL. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1103101A true CA1103101A (en) | 1981-06-16 |
Family
ID=19827144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA289,885A Expired CA1103101A (en) | 1976-11-01 | 1977-10-31 | Apparatus and method for electrostatically powderspraying, particularly of enamel |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS5363447A (en) |
| AU (1) | AU510369B2 (en) |
| BE (1) | BE847911A (en) |
| CA (1) | CA1103101A (en) |
| DE (1) | DE2748840A1 (en) |
| ES (1) | ES463741A1 (en) |
| FR (1) | FR2369003A1 (en) |
| GB (1) | GB1567244A (en) |
| IT (1) | IT1095670B (en) |
| MX (1) | MX145497A (en) |
| NL (1) | NL7612089A (en) |
| TR (1) | TR19915A (en) |
| ZA (1) | ZA776464B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112452587A (en) * | 2020-11-06 | 2021-03-09 | 褚梅 | Spraying device for machining |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7612089A (en) * | 1976-11-01 | 1978-05-03 | Ferro Bv | APPARATUS AND METHOD FOR ELECTROSTATIC POWDER SPRAY, IN PARTICULAR EMAIL. |
| DE2835474A1 (en) * | 1978-08-12 | 1980-02-28 | Esb Voehringer | Electrostatic powder coating equipment - has spray cabin mounted above powder recovery unit, containing filter and collector for recirculation |
| FR2442080A1 (en) * | 1978-11-21 | 1980-06-20 | Europ Equip Menager | ELECTROSTATIC POWDERING SYSTEM FOR OBJECTS |
| FR2442666A2 (en) * | 1978-11-21 | 1980-06-27 | Cepem | Electrostatic enamel recovery chamber - has protected by shield from injector head output and located a cylindrical filter in one chamber of two-compartment unit |
| FR2467022A2 (en) * | 1978-11-21 | 1981-04-17 | Europ Equip Menager | Electrostatic powder coating installation - uses input and output filters with inward directed air flow to prevent powder loss |
| FR2465524A1 (en) * | 1979-07-27 | 1981-03-27 | Cepem | ELECTROSTATIC POWDER INSTALLATION |
| CA1162732A (en) * | 1980-01-14 | 1984-02-28 | James L. Kennon | Continuous coater |
| DE3006837C2 (en) * | 1980-02-23 | 1983-02-17 | Basf Farben + Fasern Ag, 2000 Hamburg | Method and device for the electrostatic coating of large workpieces with powder media |
| CA1239531A (en) * | 1984-04-30 | 1988-07-26 | James F. Zeiss | Method and apparatus for powder coating elongated objects |
| DE102007005310A1 (en) * | 2007-02-02 | 2008-08-07 | Itw Gema Ag | Coating powder filter device |
| CN112718331A (en) * | 2020-12-01 | 2021-04-30 | 浙江富丽华铝业有限公司 | Section bar spraying workshop powder recovery unit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1337469A (en) * | 1962-08-03 | 1963-09-13 | Sames Mach Electrostat | Automatic powder coating device in the cabin, or closed enclosure |
| ES181314Y (en) * | 1971-10-29 | 1974-03-01 | Mamellini | PERFECTED APPARATUS FOR SPRAYING PROTECTIVE POWDERS. |
| FR2300625A1 (en) * | 1975-02-13 | 1976-09-10 | Air Ind | ELECTROSTATIC POWDERING PLANT |
| NL7612089A (en) * | 1976-11-01 | 1978-05-03 | Ferro Bv | APPARATUS AND METHOD FOR ELECTROSTATIC POWDER SPRAY, IN PARTICULAR EMAIL. |
-
1976
- 1976-11-01 NL NL7612089A patent/NL7612089A/en not_active Application Discontinuation
- 1976-11-03 BE BE172015A patent/BE847911A/en unknown
-
1977
- 1977-10-28 FR FR7732737A patent/FR2369003A1/en active Granted
- 1977-10-31 IT IT46906/77A patent/IT1095670B/en active
- 1977-10-31 MX MX171148A patent/MX145497A/en unknown
- 1977-10-31 TR TR19915A patent/TR19915A/en unknown
- 1977-10-31 GB GB45168/77A patent/GB1567244A/en not_active Expired
- 1977-10-31 AU AU30174/77A patent/AU510369B2/en not_active Expired
- 1977-10-31 JP JP12980377A patent/JPS5363447A/en active Pending
- 1977-10-31 ES ES463741A patent/ES463741A1/en not_active Expired
- 1977-10-31 ZA ZA00776464A patent/ZA776464B/en unknown
- 1977-10-31 DE DE19772748840 patent/DE2748840A1/en not_active Withdrawn
- 1977-10-31 CA CA289,885A patent/CA1103101A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112452587A (en) * | 2020-11-06 | 2021-03-09 | 褚梅 | Spraying device for machining |
| CN112452587B (en) * | 2020-11-06 | 2022-04-08 | 唐山立德金属制品有限公司 | Spraying device for machining |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA776464B (en) | 1978-08-30 |
| MX145497A (en) | 1982-02-25 |
| JPS5363447A (en) | 1978-06-06 |
| IT1095670B (en) | 1985-08-17 |
| AU510369B2 (en) | 1980-06-19 |
| ES463741A1 (en) | 1978-12-16 |
| BE847911A (en) | 1977-03-01 |
| TR19915A (en) | 1980-04-28 |
| DE2748840A1 (en) | 1978-05-03 |
| FR2369003A1 (en) | 1978-05-26 |
| GB1567244A (en) | 1980-05-14 |
| AU3017477A (en) | 1979-05-10 |
| NL7612089A (en) | 1978-05-03 |
| FR2369003B1 (en) | 1982-05-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 19980616 |