EP0791400B1 - Verfahren und Vorrichtung zum Aufbringen einer Beschichtung auf einen Gegenstand - Google Patents
Verfahren und Vorrichtung zum Aufbringen einer Beschichtung auf einen Gegenstand Download PDFInfo
- Publication number
- EP0791400B1 EP0791400B1 EP96120821A EP96120821A EP0791400B1 EP 0791400 B1 EP0791400 B1 EP 0791400B1 EP 96120821 A EP96120821 A EP 96120821A EP 96120821 A EP96120821 A EP 96120821A EP 0791400 B1 EP0791400 B1 EP 0791400B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- line
- fluid flow
- coating
- particle
- powder
- 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 - Lifetime
Links
- 239000011248 coating agent Substances 0.000 title claims description 37
- 238000000576 coating method Methods 0.000 title claims description 37
- 238000000034 method Methods 0.000 title claims description 11
- 239000012530 fluid Substances 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims 2
- 230000000740 bleeding effect Effects 0.000 claims 1
- 239000000843 powder Substances 0.000 description 33
- 239000002245 particle Substances 0.000 description 18
- 239000000203 mixture Substances 0.000 description 10
- 238000003466 welding Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 230000008021 deposition Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 239000008141 laxative Substances 0.000 description 1
- 230000002475 laxative effect Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
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
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
- B05B13/0618—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies only a part of the inside of the hollow bodies being treated
-
- 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
-
- 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
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
Definitions
- the invention relates to a method for Applying a coating to an object according to Preamble of claim 1. Furthermore, the Invention a device for applying a Coating on an object according to the preamble of Claim 5.
- the Coating particles are on the to be coated Applied object, possibly under influence electrostatic charge, and there, e.g. by a heat treatment, a durable coating.
- a procedure is particularly known for Coating or spraying the inner seam of can frames or the entire inner wall of can frames Coating material.
- It has to be Coating material usually a powder, over a long management are promoted because of access to the closed frame only by the welding machine can be done through.
- the long line requires one high speed of the fluid, usually air, around the powder in sufficient quantity along the long line to promote. A high air speed or However, particle velocity is at the exit point disadvantageous because it causes the powder particles from the coating surface can bounce back what deposition efficiency deteriorates.
- EP-A-0 732 151 shows a coating device, where some of the fluid is at the beginning of the Delivery line is removed.
- the fluid velocity in the following line area reduces what the coating particles expel effected at low speed and thus the Degree of application increased. So the invention does that Separation of transport-related, in Exit or spray area but disruptive fluid from the Fluid powder mixture.
- the lower speed and the associated increase in pressure continues to have an effect a swirling of the inflowing particles, what a better homogeneity of the exiting particle stream results.
- Figure 1 shows schematically the structure of a Plant for the production and coating of can bodies.
- the invention is illustrated below using this example explained in more detail, this being only as a preferred embodiment is to be understood.
- the invention can also the coating of other objects.
- Figure 1 shows a conveyor 1, which in the figure only schematically as a continuous conveyor belt is shown. With a real investment this Several types of funding can be provided with appropriate transfer elements be provided one after the other.
- the one on the Conveyor 1 supported can bodies 2-7 manufactured in a known manner so that in a rounding station 8 a flat sheet is deformed into a can frame whose longitudinal seam is not yet closed.
- the longitudinal seam can be closed further along the conveyor line at least in the roller seam welding machine 9 overlapped so that the Seam of the can frame using welding rollers 10 and 11 and are usually welded to a wire electrode can.
- the welded can frames leave the Welding machine and arrive at a coating station.
- the coating station either only the Weld seam or the entire inner wall of the frame provided with a coating material.
- can this can be a coating powder which is inside the can is applied. This can cause an electrostatic charge of the powder are provided to ensure good adhesion to reach the powder on the inside of the can.
- a Subsequent station 13 then undergoes a heat treatment performed the can frame, which a melting of the Powder causes.
- the coating is done by Cooling down to the finished hard coating.
- the powder-air mixture ejected and hits as ejected cloud 17, whose Shape depending on the design of the discharge area of the line 16 or the desired result of the inner coating can vary on the inside of the can frame.
- the described method and the one shown Plant known. According to the invention, a Part of the fluid flow in line 16 in front of the outflow area taken from the line.
- a suction line 18 is provided, which on a Place 19 in line 16 and which on the other End is connected to a vacuum source 20, which is the suction of part of the fluid flow in the Line 16 causes.
- the extracted fluid can after Vacuum source 20 are released into the environment, wherein a filter can be provided, which with the Fluid powder particles sucked together holds back.
- the suction of part of the fluid flow brings about the advantages described at the beginning. In particular can thereby the conveying speed for the Powder held up by means of the compressed air in line 16 be what the proper conveyance of the powder along the long line.
- suction becomes the speed of the powder-air mixture after the suction point 19, i.e.
- the amount the extracted fluid flow can be adjusted the vacuum source can be varied.
- the setting can be done empirically such that despite the suction, enough powder on the inside of the frame is deposited.
- FIG. 2 shows a preferred embodiment the front area of line 16, which contains the powder-air mixture promotes.
- the powder-air mixture is conveyed again through line 16, at the exit end thereof 23 the discharge of a mixture of powder and air he follows.
- the suction of part of the stream in the Line 16 also takes place here by means of line 18, which opens into line 16 in an area 19 '.
- part of the wall of the line 16 is for Formation of a corresponding opening 24 omitted.
- Connecting element 25 connects the two lines 18 and 16 with each other and forms a closed one Connection space 19 'through which the line 18 via the Opening 24 in connection with the interior of the line 16 stands.
- the total stream A is now divided from powder and air into the two sub-streams B and C such that the recirculated partial stream B essentially only from the There is fluid or air and contains no powder particles.
- the partial stream B is removed here after a curved region 26 of line 16, the centrifugal effect this pipe curvature is used. Accordingly move the heavier compared to the transport gas Powder particles predominantly on the right one in the drawing Along the manifold wall and thus in area 27.
- Im in der Drawing left cross-sectional area 28 of the manifold flows mainly transport gas free of powder particles, which is essential without the amount of powder conveyed to be reduced, sucked off through line 18 can.
- This embodiment results in a separation of transport-related, in the spray area but disruptive gas from the gas-powder mixture.
- the flow rate the gas-powder mixture in stream C is reduced, so the relative velocity of the gas powder flow to be coated at a certain speed transported can frame greatly reduced becomes.
- This reduction ensures that the Powder particles less of the surface to be coated bounce off and thus improves the application efficiency becomes. They continue at a certain speed conveyed powder particles due to the pressure increase and the associated decrease in speed slowed down in partial flow C due to the impulse effect and thereby creating an almost homogeneous gas-air cloud over the Whole line cross section swirled in area C. Thereby a more uniform powder layer thickness is achieved.
- the pipe curvature shown is simple Means for separating the powder-air mixture in an area that mainly contains only air and one Area that contains powder and air.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Electrostatic Spraying Apparatus (AREA)
- Coating Apparatus (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH44796 | 1996-02-21 | ||
CH447/96 | 1996-02-21 | ||
CH44796 | 1996-02-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0791400A1 EP0791400A1 (de) | 1997-08-27 |
EP0791400B1 true EP0791400B1 (de) | 2000-05-03 |
Family
ID=4187246
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96120821A Expired - Lifetime EP0791400B1 (de) | 1996-02-21 | 1996-12-23 | Verfahren und Vorrichtung zum Aufbringen einer Beschichtung auf einen Gegenstand |
Country Status (5)
Country | Link |
---|---|
US (1) | US5863600A (ja) |
EP (1) | EP0791400B1 (ja) |
JP (1) | JPH09234413A (ja) |
DE (1) | DE59605130D1 (ja) |
TW (1) | TW341551B (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090123777A1 (en) * | 2007-11-14 | 2009-05-14 | Uct Coatings Llc. | Method of improving the performance of a hydrodynamic surface |
CN109548206B (zh) * | 2018-12-28 | 2021-03-23 | 泉州铭狮卫浴有限公司 | 石墨烯发热管的制作方法及石墨烯发热管、空气涂抹设备 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3901184A (en) * | 1974-07-23 | 1975-08-26 | Continental Can Co | Pneumatic powder flow diverting device |
JPS5243846A (en) * | 1975-10-03 | 1977-04-06 | Senichi Masuda | Device for electrostatic powder coating |
US4259923A (en) * | 1980-04-08 | 1981-04-07 | The Continental Group, Inc. | Reverse spray electrostatic air/powder stripe applicator |
US4411935A (en) * | 1981-11-02 | 1983-10-25 | Anderson James Y | Powder flame spraying apparatus and method |
EP0093083B2 (de) * | 1982-04-27 | 1993-11-24 | Siegfried Frei | Verfahren zum Auftragen einer Pulverschicht und eine Pulverauftragsvorrichtung |
US4500038A (en) * | 1982-11-01 | 1985-02-19 | Avco Corporation | Powder feed system with recirculator for plasma spray apparatus |
JPS59177164A (ja) * | 1983-03-21 | 1984-10-06 | ジ−グフリ−ト・フライ | 円筒形の缶の本体の溶接継目上に条片状の粉末の層を付着させる方法と装置 |
CH663910A5 (de) * | 1985-02-21 | 1988-01-29 | Praezisions Werkzeuge Ag | Beschichtungsanordnungen sowie deren verwendung. |
JPH0615050B2 (ja) * | 1986-02-05 | 1994-03-02 | ノードソン株式会社 | 粉粒体の断続スプレイ塗布方法とそのガン |
US4886013A (en) * | 1989-01-12 | 1989-12-12 | Nordson Corporation | Modular can coating apparatus |
US5474609A (en) * | 1992-06-30 | 1995-12-12 | Nordson Corporation | Methods and apparatus for applying powder to workpieces |
US5725670A (en) * | 1994-02-18 | 1998-03-10 | Nordson Corporation | Apparatus for powder coating welded cans |
-
1996
- 1996-12-23 EP EP96120821A patent/EP0791400B1/de not_active Expired - Lifetime
- 1996-12-23 DE DE59605130T patent/DE59605130D1/de not_active Expired - Fee Related
- 1996-12-30 TW TW085116270A patent/TW341551B/zh active
-
1997
- 1997-01-24 US US08/788,687 patent/US5863600A/en not_active Expired - Fee Related
- 1997-02-21 JP JP9037340A patent/JPH09234413A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE59605130D1 (de) | 2000-06-08 |
JPH09234413A (ja) | 1997-09-09 |
EP0791400A1 (de) | 1997-08-27 |
US5863600A (en) | 1999-01-26 |
TW341551B (en) | 1998-10-01 |
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