WO2000010739B1 - Process and device for treating surfaces - Google Patents
Process and device for treating surfacesInfo
- Publication number
- WO2000010739B1 WO2000010739B1 PCT/FI1999/000654 FI9900654W WO0010739B1 WO 2000010739 B1 WO2000010739 B1 WO 2000010739B1 FI 9900654 W FI9900654 W FI 9900654W WO 0010739 B1 WO0010739 B1 WO 0010739B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- powder
- nozzle
- approx
- nozzles
- air
- Prior art date
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
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
- B05B7/1404—Arrangements for supplying particulate material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
- B05B7/1481—Spray pistols or apparatus for discharging particulate material
- B05B7/1486—Spray pistols or apparatus for discharging particulate material for spraying particulate material in dry state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/12—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
- B24C3/06—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable
- B24C3/065—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable with suction means for the abrasive and the waste material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
-
- 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
- B05B14/10—Arrangements for collecting, re-using or eliminating excess spraying material the excess material being particulate
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Cleaning In General (AREA)
Abstract
The invention relates to a process for treating surfaces by means of a mixture of air and powder introduced through a powder nozzle (46), whereby the velocity of the outflow of the powder particles used from the powder nozzle (46) is substantially less than 40 m/s. Furthermore, the invention is related to a device for treating surfaces comprising a pressure unit (52) and a multi-nozzle tool (40) comprising at least two powder nozzles (46). Additionally, the invention relates to the use of the process and/or device according to the invention for powder-based painting/coating of surfaces along with or without a process for cleaning, whereby the surface to be treated is pretreated with a suitable base coat liquid and while said base coat liquid is still wet, by utilizing the method and the device according to the invention, powder paint/coating agent is sprayed to attach onto/react with the base coat liquid spread on the surface to form the final coat of paint/coating.
Claims
1. Process for cleaning surfaces with a mixture of powder and air or some other gas, whereby the mixture of powder and air or some other gas is directed to the surface to be treated by means of a powder nozzle (46), characterized in that an average velocity of the outflow of the powder particles to be used from the powder nozzle (46) is substantially less than 65 m/s.
2. Process according to claim 1, characterized in that the velocity of the outflow of the powder particles to be used from the powder nozzle (46) is preferably less that 55 m/s.
3. Process according to claim 1 or 2, characterized in that the velocity of the outflow of the powder particles to be used from the powder nozzle (46) is preferably within the range of 5 to 50 m/s and very preferably within the range of 15 to 45 m/s.
4. Process according to claim 1 or 2, characterized in that the velocity of the outflow of the powder particles to be used from the powder nozzle (46) is preferably within the range of 15 to 35 m/s.
5. Process according to any of claims 1 - 4, characterized in that the gas to be used, e.g. air, is directed into an air nozzle (47) after which the powder used is mixed therein, whereafter the mixture of gas and powder is directed through the powder nozzle (46) to the surface to be cleaned and that the gas flow per air nozzle (47) is less than approx. 300 1/min/nozzle.
6. Process according to any of the preceding claims 1 - 5, characterized in that the amount of the gas flow used per air nozzle (47) is less than approx. 280 1/min/nozzle.
7. Process according to any of the preceding claims 1 - 6, characterized in that the amount of the gas flow used per air nozzle (47) is within the range of 30-280 1/min/nozzle and very preferably approx. 50-250 1/min/nozzle.
28
8. Process according to any of the preceding claims, characterized in that the distance of the powder particles used flowing out of the powder nozzle/s (46) from the surface to be cleaned treated is substantially less than approx. 10 cm and preferably within the range of approx. 3 to 5 cm.
9. Process according to any of the preceding claims, characterized in that the powder is subjected further to sub-atmospheric pressure facilitating the movement of the powder in the tool, said sub-atmospheric pressure being directed substantially to the vicinity of the surface to be treated and said sub-atmospheric pressure being used to withdraw loose particles near the surface under treatment to the recovery e.g. to be regenerated in a purifying unit (10, 20).
10. Process according to any of the preceding claims, characterized in that a surface is cleaned treated with a mixture of powder and air or some other gas, and that the mixture of powder and air or some other gas is directed to the surface to be cleaned by means of a multi-nozzle tool (40) comprising at least two pairs of nozzles (46, 47) that are comprised of an air nozzle (47) and a powder nozzle (46) and that
- the cross-sectional area of the inner surface of the air nozzles (47) is preferably < approx. 7 mm2 and with circular cross-sections, the inner diameters are < approx. 3 mm, and preferably the cross-sectional area of the inner surface of the air nozzle (47) is approx. 0.8- 3 mm2 or with circular cross-sections, the inner diameter is approx. 1-2 mm, and that
- a mixture of gas and powder is sprayed through the powder nozzles (46) whereby the cross-sectional area of the inner surface of the powder nozzle (46) is preferably < approx. 39 mm2 or with circular inner cross-sections, the diameter is < approx. 7 mm, and preferably, the cross-sectional area of the inner surface of the powder nozzle (46) is approx. 7-29 mm2 and with circular cross-sections, the inner diameter is in the range of approx. 3-6 mm.
11. Process according to any of the preceding claims, characterized in that at least one powder spray leaving the multi-nozzle tool positioned towards the surface to be cleaned has a different impact angle in comparison with the impact angle of the other powder sprays leaving the multi-nozzle tool and directed towards to the surface to be cleaned.
29
12. Process according to any of the preceding claims, characterized in that the surface is cleaned with a mixture comprising at least two of the powders listed below:
- acrylic plastic powder, the particle size of which being preferably approx. 0.05 μm - approx. 420 μm;
- aluminum oxide powder, the particle size of which being preferably approx. 0.05 μm - approx. 420 μm, dustfree;
- silicon carbide, the particle size of which being preferably approx. 0.005 μm - approx. 280 μm; - powder of glass beads, the particle size of which being preferably approx. 0.05 μm - approx. 150-220 μm;
- quartz sand powder, the particle size of which being preferably approx. 0.005 μm - approx. 300 μm; said powders very preferably being dustfree.
13. Process according to any of the preceding claims 1-11, characterized in that the surface is cleaned with a powder of glass beads and silicon carbide, said powder being preferably dust-free and having the diameter of the powder particles approx. 0.06-0.18 mm.
14. Process according to any of the preceding claims, characterized in that by means of a suction conduit (62) the powder is subjected to sub-atmospheric pressure in the suction member (60) preferably in such a way that the endface of the powder nozzle (46) is closer to the surface to be cleaned than the suction conduit (62), whereby the velocity of the powder spray, the powder material itself, the intensity of the suction used and the location of the suction conduit (62) preferably behind the endface of the powder nozzle (46) as well as the properties of the surface nozzle (63) together create a counterpressure to the powder used changing the direct spray from the powder nozzles into a cloud-like particle formation, said cloud of powder particles creating a desired result on the surface to be cleaned .
30
15. Device for treating surfaces comprising a pressure unit (52) and a tool, characterized in that the tool is a multi-nozzle tool (40) comprising at least two powder nozzles (46).
16. Device according to claim 15, characterized in that the multi-nozzle tool 40 comprises at least two pairs of nozzles (47, 46) that are comprised of an air nozzle (47) and a powder nozzle (46) and that
- the cross-sectional area of the inner surface of the air nozzles (47) is preferably < approx. 7 mm2 and with circular cross-sections the inner diameters are < approx. 3 mm, and preferably the cross-sectional area of the inner surface of the air nozzle (47) is approx. 0.8- 3 mm2 or with circular cross-sections, the inner diameter is approx. 1-2 mm, and that
- the cross-sectional area of the inner surface of the powder nozzle (46) is < approx. 39 mm2 or with circular inner cross-sections the diameter is < approx. 7 mm, and preferably the cross-sectional area of the inner surface of the powder nozzle (46) is approx. 7-29 mm2 and with circular cross-sections, the inner diameter is in the range of approx. 3-6 mm.
17. Device according to claim 16, characterized in that the multi-nozzle tool (40) has preferably 2-10 pairs of nozzles (47, 46).
18. Device according to claim 15, 16 or 17, characterized in that in contact with the frame structure (44) for the powder nozzles of the multi-nozzle tool (40), at least two powder nozzles (46) are provided at a distance from the surface to be treated.
19. Device according to claim 14, 15 or 16, characterized in that there are at least two pairs of nozzles (47, 46) arranged to the multi-nozzle tool (40), said pairs of nozzles having different nozzle diameters, i.e. two pairs of nozzles having air nozzles (47) with the inner diameters of 1.5 mm and the corresponding powder nozzles (46) with the inner diameters of 4.5 mm, and two pairs of nozzles (47, 46) having air nozzles (47) with the inner diameters of 2 mm and the corresponding powder nozzles (46) with the inner diameters of
3
20. Device according to any of the preceding claims 15 - 19 comprising further a cyclone element (20), in connection with which there are a coarse screen (28), a powder pump (33) and a powder container (32), and a suction element (10), in connection with which a motor (11), waste container (13) and a screening element (12) are arranged, characterized in that the multi-nozzle tool (40) also comprises
a body (41), with an associated inlet conduit (51), to which an inlet hose (511) of pressure medium - such as air or some other gas or gas mixture - is provided, and said body (41) further comprising a discharge conduit (49) for pressurized air through which conduit the powder pump (33) receives the pressurized air required,
a discharge conduit (49) arranged after a closing valve (53),
a closing valve (53) with a operating wire (50) of the closing valve (301) provided in connection with the operational means of the closing valve,
a frame structure (43) for air nozzles to which at least two air nozzles (47) are arranged,
a frame structure (44) for the powder nozzles positioned in connection with the frame structure (43) for the air nozzles, said frame structure (44) being provided with at least two powder nozzles (46),
an inlet conduit (48) for powder arranged to the frame structure (43) for the air nozzles, and a powder channel (481) leading from the inlet conduit (48) to the vicinity of each air nozzle, through which powder channel the powder to be fed in/withdrawn is mixed with the pressurized air coming from nozzles (47) after the nozzles (47),
mixing tubes (461) located in the frame structure (44) for the powder nozzles, in which mixing tubes the air and powder are mixed into each other and through
32
which mixing tubes the mixture of air and powder moves further to the powder nozzles (46) that direct the mixture of air and powder to the surface to be treated,
a suction member (60) in connection with the frame structure (44) for the powder nozzles comprising a suction collar (61) and a suction conduit (62) arranged in contact therewith, through which suction conduit the used powder remaining inside the suction collar and the dirt possibly coming off the surface are withdrawn to be processed in the suction element (10) /cyclone element (20), and a surface nozzle (63) in connection with the suction collar ensuring that a good contact is obtained with the multi-nozzle tool (40) to the surface to be cleaned even if the surface is uneven.
21. Device according to any of claims 15 - 20, characterized in that that the endface of the powder nozzle (46) is preferably closer to the surface to be cleaned than the suction conduit (62) whereby the velocity of the powder spray, the powder material itself, the intensity of the suction used and the location of the suction conduit (62) preferably behind the endface of the powder nozzle (46) as well as the properties of the surface nozzle (63) together create a counterpressure to the used powder changing the direct spray from the powder nozzles into a cloud-like particle formation, said cloud of powder particles creating a desired result on the surface to be treated e.g. in powder cleaning or coating.
22. Process according to any of claims 15 - 21, characterized in that at least one powder spray leaving the multi-nozzle tool positioned towards the surface to be treated has a different impact angle in comparison with the impact angle of the other powder sprays leaving the multi-nozzle tool and directed towards the surface to be treated.
23. Device according to any of claims 15 - 22, characterized in that it preferably also comprises a transport unit (1) inside which the suction element (10) and the cyclone element (20) can be arranged, thus providing easy transportation of the cleaning device.
24. Use of the process and device according to any of preceding claims for removing graffiti markings and other difficult dirt (e.g. soot, stains of organic growth etc.) from
33
surfaces and for removal of different kinds of protective coverings from various kind of surfaces.
25. Use of a device according to any of claims 15 - 24 for powder-based painting/coating of surfaces along with or without a process for cleaning, whereby the surface to be treated is pretreated with a suitable base coat liquid and while said base coat liquid is still wet, by utilizing the device according to the invention, powder paint/coating agent is sprayed to attach onto/react with the base coat liquid spread on the surface to form the final coat of paint/coating.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99936646A EP1109631A1 (en) | 1998-08-07 | 1999-08-06 | Process and device for treating surfaces |
| AU51670/99A AU5167099A (en) | 1998-08-07 | 1999-08-06 | Process and device for treating surfaces |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI981716A FI981716A0 (en) | 1998-08-07 | 1998-08-07 | Method and apparatus for treating surfaces |
| FI981716 | 1998-08-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2000010739A1 WO2000010739A1 (en) | 2000-03-02 |
| WO2000010739B1 true WO2000010739B1 (en) | 2000-04-20 |
Family
ID=8552277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FI1999/000654 WO2000010739A1 (en) | 1998-08-07 | 1999-08-06 | Process and device for treating surfaces |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1109631A1 (en) |
| AU (1) | AU5167099A (en) |
| FI (1) | FI981716A0 (en) |
| WO (1) | WO2000010739A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2811919B1 (en) * | 2000-07-19 | 2003-01-24 | Mxd | MOBILE AND HANDY APPARATUS FOR SCRATCHING GRAFFITIS |
| CA2438275C (en) | 2001-02-26 | 2010-05-25 | Dompe S.P.A. | Apparatus and method for micron and submicron particle formation |
| FR2883500A1 (en) * | 2005-03-24 | 2006-09-29 | Yannick Jego | Mineral scraping and fossil cleaning device e.g. sand blaster apparatus, has dismountable mixer sets with interchangeable sprinklers that permit mixing of air and abrasive and have diameter chosen as function of aggregate |
| DE102016123813A1 (en) * | 2016-12-08 | 2018-06-14 | Air Liquide Deutschland Gmbh | Arrangement and method for treating a surface |
| DE102018115510A1 (en) * | 2018-06-27 | 2020-01-02 | Washtec Holding Gmbh | High pressure cleaning device, cleaning dispersion and arrangement of high pressure cleaning device to surface |
| CN109968213B (en) * | 2019-04-30 | 2020-05-19 | 上海外高桥造船有限公司 | Sand washing gun protection device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4401695A (en) * | 1982-06-01 | 1983-08-30 | Ppg Industries, Inc. | Method of and apparatus for applying powder coating reactants |
| SE8305891L (en) * | 1983-10-27 | 1985-04-28 | Icab Ind Coating Ab | METHOD OF SPRAY NOZZLE EQUIPMENT FOR IMPLEMENTATION OF THE PROCEDURE |
| US4987001A (en) * | 1989-02-09 | 1991-01-22 | Nordson Corporation | Method and apparatus for coating the interior surface of hollow, tubular articles |
| CZ285789B6 (en) * | 1991-12-11 | 1999-11-17 | Christian Diat | Apparatus for micro-cleaning of surfaces |
| FR2720663B1 (en) * | 1994-02-01 | 1997-08-14 | Christian Diat | Method and device for dispensing a mixture of compressed air and powder. |
| US5773091A (en) * | 1996-07-11 | 1998-06-30 | Brandeis University | Anti-graffiti coatings and method of graffiti removal |
-
1998
- 1998-08-07 FI FI981716A patent/FI981716A0/en unknown
-
1999
- 1999-08-06 WO PCT/FI1999/000654 patent/WO2000010739A1/en not_active Application Discontinuation
- 1999-08-06 AU AU51670/99A patent/AU5167099A/en not_active Abandoned
- 1999-08-06 EP EP99936646A patent/EP1109631A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| AU5167099A (en) | 2000-03-14 |
| WO2000010739A1 (en) | 2000-03-02 |
| FI981716A0 (en) | 1998-08-07 |
| EP1109631A1 (en) | 2001-06-27 |
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