WO1999061165A1 - Powder coating installation with direct reuse of excess powder - Google Patents
Powder coating installation with direct reuse of excess powder Download PDFInfo
- Publication number
- WO1999061165A1 WO1999061165A1 PCT/EP1999/003525 EP9903525W WO9961165A1 WO 1999061165 A1 WO1999061165 A1 WO 1999061165A1 EP 9903525 W EP9903525 W EP 9903525W WO 9961165 A1 WO9961165 A1 WO 9961165A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- powder
- coating system
- supply device
- preparation
- powder coating
- 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
- B05B7/1454—Arrangements for supplying particulate material comprising means for supplying collected oversprayed 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
- 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
- B05B14/45—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths using cyclone separators
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Definitions
- the invention relates to a powder coating system, which is particularly, but not exclusively, intended for manual operation.
- a powder coating installation usually comprises one
- Powder preparation and supply device for a powder application device such as an electrostatically operated powder coating gun, by means of which powder can be applied to parts in a cabin.
- a powder coating system comprises a powder separation device, such as a cyclone, cartridge filter or the like, which separates excess powder from the conveying air, which is removed from the cabin interior, during the coating process. The exhaust air from the powder separation device can then be discharged to the environment via a post-filter.
- the powder recovered from the powder separation device could not be used immediately for one and the same powder application process, but the powder was filled into appropriate containers at the powder separation device, which were then used again for further powder coating processes.
- This procedure is time-consuming, cumbersome and, in particular, a relatively large powder consumption is to be expected when the individual part coating is carried out in this way.
- the aim of the invention is to enable the operation of a powder coating system which is as powder-saving as possible in a structurally simple manner.
- a powder coating system is provided with a powder preparation and supply device for a powder application device for powder application to parts in a cabin, from which excess powder can be fed to a powder separation device and which powder coating system is characterized in that the powder accumulating in the powder separation device is closed the powder preparation and supply device is recoverable.
- a closed powder cycle is thus provided, and the excess powder separated off by means of the powder separation device is returned directly to the powder preparation and supply device without intermediate storage, in order to be used again for the powder application process with the aid of the powder application device.
- the total powder consumption in such powder coating systems can be reduced, since the excess powder which is inevitably produced when the powder is applied is kept in the powder cycle and can be used and used again without intermediate storage.
- Such a closed powder cycle for a powder coating system is not only suitable for so-called manual booths, but the closed powder cycle is also advantageous in automatic booths.
- a conveyor pump which is preferably located at the powder outlet of the powder separation device, is expediently used to convey the powder from the powder separation device to the powder preparation and supply device is provided.
- the powder separated by means of the powder separation device is thus reclaimed directly from the outlet of the powder separation device to the powder preparation and supply device.
- the feed pump can be returned via a hose line to a corresponding container of the powder preparation and supply device.
- the return to the powder preparation and supply device is preferably carried out via a passage opening in a cabin boundary surface, which establishes the connection to the powder preparation and supply device. In this way it can be avoided that the returned powder can pollute the environment and in particular the conveying air in the closed air system of the cabin can be used in a fuel-efficient manner.
- the passage opening also allows powder adhering to the boundary surface of the cabin to be mechanically introduced into the passage opening.
- a wiper or the like can be provided, for example.
- the powder can also be used efficiently for the powder coating, which is not detected by the extraction area of the cabin, which leads to the powder separation device, but remains adhering to the wall surface as the boundary wall of the cabin. This allows the powder consumption to be optimized overall.
- the passage opening in the cabin floor is preferably provided as a cabin boundary surface.
- powder not yet captured by the extraction device collects on the bottom surface. Therefore, it is particularly useful to create a possibility, even this excess To effectively use powder in the powder cycle and to recycle it to the powder preparation and supply facility.
- the passage opening is preferably designed and arranged in such a way that it opens directly into the powder preparation and supply device. In this way, in particular, the conveying routes and consequent losses in the conveying lines can be reduced.
- a common passage opening is provided for the powder coming from the powder separating device and the mechanically requested powder. streams or powder fractions are combined and combined at a suitably suitable point, and expediently immediately before they are returned to the powder container of the powder preparation and supply device.
- the powder preparation and supply device is expediently arranged at least partially below the cabin floor and in the immediate vicinity of the passage opening.
- the powder can thus in turn be introduced into the powder container of the powder preparation and supply device in the shortest possible way.
- the powder preparation and supply device and in particular the powder container can be pressed against the passage opening by means of a lifting device.
- a lifting device in which the powder preparation and supply device and in particular its powder container is partially arranged below the floor of the cabin, but there is still a space between the passage opening and powder preparation and supply device, an insert is used in the passage opening as to the interior of the powder preparation - And supply device leading adapter releasably used. When the cabin is completely cleaned, the insert can be removed and the insert and the associated parts can be cleaned separately.
- the insert preferably has an area open to the cabin boundary surface for mechanically demanding excess powder which has adhered to the cabin boundary surface, and an introduction region for the powder coming from the powder separation device.
- the insert thus forms the merging device of the two powder streams, and in particular this prevents the conveying air for the powder coming from the powder separating device from causing turbulence in the entry area to the powder preparation and supply device. Therefore, in use these two areas are spatially separated, but combined in one component and functionally combined with regard to the return to the powder preparation and supply device.
- a device which separates the conveying air from the powder is expediently arranged in the introduction area for the powder coming from the powder separation device and can preferably be designed as a type of mini-cyclone.
- the separated conveying air can be returned to the cabin without powder being entrained from the cabin.
- the device separating the conveying air from the powder is preferably held detachably on the insert.
- a screen device which expediently carries out a vibration movement, can expediently be arranged on the transition area from the insert to the powder preparation and supply device. With this, any lumps that may have formed can be dissolved and, if necessary, impurities can be separated.
- the powder coating system can expediently be designed as a _fer__fc -____ rine, and the _rulve-_auf-bs__eit ⁇ _ngs- and supply device can be designed as a transportable, independent unit.
- the invention is not limited to this, since the closed powder cycle essential to the invention can also be implemented in automatic booths which have a corresponding powder center as a powder preparation and supply device.
- the powder coating system not only can the powder consumption be optimized, but the powder coating is also less polluting for the environment and in particular for the operating personnel.
- the powder is reclaimed in an effective and constructively simple manner in a closed circuit starting from the powder preparation and supply device via the powder application device and the powder separation device to the powder preparation and supply device.
- the powder which may still adhere to the cabin floor, in particular, is also returned to the powder preparation and supply device independently of the powder separation device.
- FIG. 1 is a perspective view of a schematic representation of a powder coating system according to the invention
- FIG. 2 shows a detail view to illustrate the details in the area of the return zone to the powder preparation and supply device
- FIG 3 shows a perspective detail view to clarify the details in the area of the return zone to the powder preparation and supply device according to a modified embodiment variant.
- a powder coating system 1 is shown schematically in a perspective view, which in the example shown is designed as a manual cabin, for example.
- This powder coating system 1 has a powder preparation and supply device 2, which can be designed in a conventional manner and which serves to supply a powder application device 3, which is illustrated in the example shown as a coating gun.
- a powder preparation and supply device 2 which can be designed in a conventional manner and which serves to supply a powder application device 3, which is illustrated in the example shown as a coating gun.
- a powder application device 3 which is illustrated in the example shown as a coating gun.
- a powder application device 3 which is illustrated in the example shown as a coating gun.
- the cabin 5 comprises boundary surfaces on all sides and, for example, an access area 7 for an operator Manual coating of the parts not shown in the booth 5.
- the booth 5 also has a booth floor 8 as a booth delimitation surface Powder separation device is eligible.
- this powder separating device 11 can be formed by a cyclone or another separating device, such as a filter device or the like.
- the powder is separated from the air flow, and the exhaust air is passed via an exhaust air outlet 12 to a post-filter device, not shown in detail.
- the powder separated in the powder separating device 11 arrives at a powder outlet 13, at which a feed pump 14 is provided, which is connected to the powder preparation and supply device 2 via a hose line 15 to reclaim the powder accumulated in the powder separating device 11.
- a device 16 for separating powder and conveying air is provided before returning to the powder preparation and supply device 2.
- a passage opening 17 is preferably provided in the area of the cabin floor 8, which is directly connected to the powder chamber (not shown in more detail) of the powder preparation and supply device 2.
- FIG. 2 shows details of this preferred embodiment for the recovery of the excess powder to the powder preparation and supply device 2.
- An insert 18 is expediently provided as an intermediate piece, which is preferably removable.
- This insert 18 comprises an open area 19 which is open to the cabin floor 8.
- powder that has stuck to the boundary wall surface, such as the cabin floor 8 can also mechanically adhere, for example Are conveyed with the aid of a scraper (not shown in more detail) and then falls directly into the powder preparation and supply device 2.
- the insert 18 comprises an introduction area 20 for the powder coming from the powder separating device 11.
- the device 16 for separating powder and conveying air is detachably arranged, which can be designed in the form of a mini-cyclone.
- the separated conveying air can be returned to the cabin interior via an air outlet 12.
- the powder reclaimed by the powder separation device 11 via the hose line 15 is returned to the powder preparation and supply device 2 via a powder outlet 13.
- the insert 18 designed as an intermediate piece and the device 16 for separating powder and conveying air can be removed from the passage opening 17.
- the insert 18 is also designed such that it extends from the cabin floor 8 into the powder room of the powder preparation and supply device 2, so that both the excess powder mechanically introduced into the open area 19 and the powder coming from the powder separation device 11 in a closed circuit is returned directly to the powder preparation and supply device 2.
- FIG. 3 shows an embodiment variant in which the powder preparation and supply device 2 can be raised and lowered by means of a lifting device 23.
- the passage opening 17 is surrounded by a sealing device 23, so that when the powder preparation and supply device 2 is lifted, a tight seal between the passage opening 17 and the powder chamber of the powder preparation and supply device 2 is ensured, since the powder preparation and supply device 2 is slightly opposed by means of the lifting device 23 the cabin floor 8 is pressed.
- the insert 18 shown in FIG. 2 can be omitted, and the powder outlet 22 of the device 16 for separating powder and conveying air can extend directly into the powder chamber of the powder preparation and supply device 2.
- the passage opening 17 itself then also delimits the open area 19, via which excess powder adhering to the floor can be mechanically reclaimed to the powder preparation and supply device 2.
- the parts in the booth 5 are coated by spraying powder with the aid of the powder application device.
- Excess powder is conveyed via the discharge device 10 to the powder separating device 12, in which the powder is separated and is reclaimed to the powder preparation and supply device 2 via a powder outlet 13 by means of a feed pump 14, the hose line 15 and the device 16 for separating powder and conveying air.
- a closed powder circuit is obtained in order to ensure that the powder is used as effectively as possible.
- connection area for the return to the powder preparation and supply device 2 can also be provided on another suitable cabin boundary surface. It is essential in the design according to the invention, however, that in the closed powder circuit a direct connection to the powder preparation and supply device 2 is obtained via a passage opening in one of the cabin boundary walls or boundary surfaces.
- the more detailed configurations of the closed powder circuit can thus be varied depending on the actual circumstances and the design of the powder preparation and supply device 2.
Landscapes
- Coating Apparatus (AREA)
- Nozzles (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99953309A EP1077776A1 (en) | 1998-05-22 | 1999-05-21 | Powder coating installation with direct reuse of excess powder |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823067A DE19823067A1 (en) | 1998-05-22 | 1998-05-22 | Powder coating appliance with mechanical/manual operation |
DE19823067.2 | 1998-05-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999061165A1 true WO1999061165A1 (en) | 1999-12-02 |
Family
ID=7868699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/003525 WO1999061165A1 (en) | 1998-05-22 | 1999-05-21 | Powder coating installation with direct reuse of excess powder |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1077776A1 (en) |
DE (1) | DE19823067A1 (en) |
WO (1) | WO1999061165A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102294312A (en) * | 2011-07-20 | 2011-12-28 | 李敬 | Spraying machine for goods shelf |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7034477U (en) * | 1970-09-17 | 1971-02-04 | Herbert Rapp | ELECTROSTATIC POWDER INJECTION DEVICE. |
US3801869A (en) * | 1971-10-06 | 1974-04-02 | S Masuda | Booth for electrostatic powder painting with contact type electric field curtain |
US4245551A (en) * | 1979-03-05 | 1981-01-20 | Nordson Corporation | Coating booth for electrostatic application of pulverized materials |
EP0137732A2 (en) * | 1983-10-05 | 1985-04-17 | Nordson Corporation | Feed and recovery system for an electrostatic powder spray apparatus |
EP0698421A1 (en) * | 1994-08-22 | 1996-02-28 | Erich Bauer | Powder recovery using a cyclone or a filter and powder transfer using a rotary element in the operation with a cyclone |
DE4430749A1 (en) * | 1994-08-30 | 1996-03-14 | Licher Hans Josef | Powder recuperation device for powder application plant |
-
1998
- 1998-05-22 DE DE19823067A patent/DE19823067A1/en not_active Withdrawn
-
1999
- 1999-05-21 WO PCT/EP1999/003525 patent/WO1999061165A1/en not_active Application Discontinuation
- 1999-05-21 EP EP99953309A patent/EP1077776A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7034477U (en) * | 1970-09-17 | 1971-02-04 | Herbert Rapp | ELECTROSTATIC POWDER INJECTION DEVICE. |
US3801869A (en) * | 1971-10-06 | 1974-04-02 | S Masuda | Booth for electrostatic powder painting with contact type electric field curtain |
US4245551A (en) * | 1979-03-05 | 1981-01-20 | Nordson Corporation | Coating booth for electrostatic application of pulverized materials |
EP0137732A2 (en) * | 1983-10-05 | 1985-04-17 | Nordson Corporation | Feed and recovery system for an electrostatic powder spray apparatus |
EP0698421A1 (en) * | 1994-08-22 | 1996-02-28 | Erich Bauer | Powder recovery using a cyclone or a filter and powder transfer using a rotary element in the operation with a cyclone |
DE4430749A1 (en) * | 1994-08-30 | 1996-03-14 | Licher Hans Josef | Powder recuperation device for powder application plant |
Also Published As
Publication number | Publication date |
---|---|
DE19823067A1 (en) | 1999-11-25 |
EP1077776A1 (en) | 2001-02-28 |
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