EP4028567A1 - Process box for a coating system - Google Patents
Process box for a coating systemInfo
- Publication number
- EP4028567A1 EP4028567A1 EP20768007.5A EP20768007A EP4028567A1 EP 4028567 A1 EP4028567 A1 EP 4028567A1 EP 20768007 A EP20768007 A EP 20768007A EP 4028567 A1 EP4028567 A1 EP 4028567A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- process box
- sides
- air inlet
- coating
- broad
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000000576 coating method Methods 0.000 title claims abstract description 43
- 239000011248 coating agent Substances 0.000 title claims abstract description 42
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 claims abstract description 13
- 238000004140 cleaning Methods 0.000 claims description 16
- 208000029154 Narrow face Diseases 0.000 abstract 2
- 239000002245 particle Substances 0.000 description 16
- 230000035515 penetration Effects 0.000 description 4
- 238000011109 contamination Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000007704 transition Effects 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
Definitions
- the invention relates to a process box for a coating system, comprising
- duct housing with two opposite, vertical front sides, two vertical narrow sides perpendicular to them and two horizontal broad sides perpendicular to the front sides and the narrow sides,
- the main element of the process box is a duct housing through which an air flow is passed, with which the dusts to be extracted are removed.
- the air flow runs essentially perpendicular to the cylinder bore, the process box having an opening on its underside which can be brought into flow contact with the cylinder bore to be coated, so that dusts arising in the cylinder bore up through said opening into the Process box can be sucked in and extracted with the air stream flowing through the process box.
- a corresponding opening is provided on the side of the duct housing opposite the above-mentioned lower opening so that the coating lance can be inserted vertically through the entire process box into the cylinder bore .
- the mechanics and motors required for the movement of the coating lance, in particular for its rotational and axial movement, can be arranged outside, in particular above, the process box in order to prevent it from being soiled by the dust produced.
- the soiling of the process box in particular its interior, is a major problem in the prior art.
- the coating process comes to a standstill during the complex manual cleaning. Such clock delays have a significant economic impact.
- the invention provides that the duct housing is designed essentially as a flat tube with a rectangular cross section.
- the invention provides that the end walls, apart from their edge, are almost exclusively composed of a - or outlet opening exist. This enables the formation of a laminar flow on the inlet side at high speed, which is suitable for diverting the coating particles flowing from the cylinder bore through the lower opening into the process box very quickly to the axial direction of the duct and preventing them from penetrating to the narrow and broad sides of the process box .
- the end face on the output side also offers the particles a surface against which they can collide and which they could become contaminated as a result.
- the laminar flow on the inlet side is swirled when it flows around the coating lance and due to the disturbance due to the coating particles flowing in from the cylinder bore, so that a turbulent flow is created on the outlet side.
- this is advantageous insofar as the inflowing particles experience a flow path that is lengthened by the vortices and therefore a longer dwell time within the process box. This means that they are completely deactivated at the latest at the output of the process box.
- the soiling of the process box walls is therefore significantly reduced due to the invention; there is also no risk of soiling downstream pipe sections.
- the air inlet is completely surrounded by a funnel-shaped apron.
- This apron represents a cross-sectional narrowing from the supply line to the process box, so that an accelerated laminar flow is generated in the process box due to the nozzle effect.
- the opening in the lower broad side of the process box is preferably arranged on the tip of a conical bulge. This facilitates an airtight placement of the said opening on the mouth of the cylinder bore.
- the corresponding incline inside the process box avoids a sharp edge at the transition from the cylinder bore to the process box, which has a beneficial effect on the suction of the coating particles from the cylinder bore into the process box.
- the proportions of the process box can also be optimized with regard to the overall goal outlined above of a fast flow that is laminar on the inlet side and turbulent flow on the outlet side. It is preferably provided that the length of the narrow sides is greater than four times their width. The length of the broad sides is preferably greater than three times their width. The width of the end faces is preferably between 1.3 times and 1.7 times times, especially between 1.4 times and 1.6 times, especially 1.5 times their height. In other words, a very flat, long cuboid is preferably chosen as the shape of the duct housing. The great length of the channel in the direction of flow ensures that the particles do not hit any wall during their active life despite the high flow velocity.
- Low height favors a fast flow rate and at the same time does not pose a particular risk of contamination of the upper wall, because - precisely because of the high flow rate - the coating particles rising from the cylinder bore are deflected very quickly in the axial direction.
- the channel In order to prevent soiling of the narrow sides of the channel, they are placed comparatively far from the central passage opening, ie the channel is designed to be comparatively wide.
- the measures according to the invention have the result that the contamination of the inside of the process box is significantly reduced and the service life of the coating system can be significantly extended before the next cleaning is required. Nevertheless, contamination of the inner walls cannot be completely ruled out.
- a further development of the invention provides that the inner sides of the duct housing are lined with sacrificial sheets. These can be quickly removed and replaced with new sacrificial sheets so that the coating system can be started up again quickly. The removed sacrificial sheets can either be cleaned or disposed of.
- a further development of the invention preferably provides that on the air inlet side of the lance passage openings on the inside of the upper broad side a cleaning nozzle directed towards the vertical connecting line between the lance passage openings is arranged, which is shaded on the air inlet side and below by an inclined deflector.
- the cleaning nozzle is preferably also shaded by lateral deflector plates. These can be formed in one piece with the aforementioned deflector plate. To clean the coating lance, it does not have to be completely removed from the process box, but can be cleaned inside the process box.
- the cleaning nozzle illuminates the coating lance drawn into the process box parallel to the direction of the suction flow.
- the jet of the cleaning nozzle is not mixed with the suction air before it reaches the coating lance to be cleaned, because the cleaning nozzle is, as described above, shaded from the suction flow by means of the deflector.
- the cleaning nozzle is completely encapsulated with the exception of the direction on the air outlet side. On the air outlet side of the coating lance, mixing of the cleaning jet with the suction air is harmless, in particular even desirable, so that the cleaning particles and the particles rinsed off by the coating lance are suctioned off with the suction air.
- Figure 1 a highly schematic, perspective view of an inventive
- FIG. 2 the process box from FIG. 1 in a partially sectioned representation in
- FIG. 1 shows a process box 10 according to the invention in a highly schematic representation.
- FIG. 2 shows the same process box 10 in a partially sectioned representation in a working position.
- the process box 10 consists essentially of a flat, rectangular duct housing. Its narrow sides 12 and its broad sides 14 are aligned parallel to the axial direction of the channel, with the broad sides 14 forming the bottom 141 and the roof 142 of the process box 10.
- the end faces 16, which are aligned transversely to the axial direction, are designed over the entire surface as an air inlet 161 or as an air outlet 162.
- the air inlet 161 is surrounded by a funnel-like skirt 17.
- In the central position in the cover 142 there is an upper access opening 18 for one which is not shown in FIG. 1, but is shown in FIG Coating lance 20 formed.
- a corresponding, lower access opening 22 is formed in the base 141 of the process box 10.
- the lower penetration opening 22 lies in the central tip area of a conical bulge 24 in the base 141. In the operating position shown in Figure 2, the edge of the lower penetration opening 22 sits sealingly on the edge of a cylinder bore 26 in an engine block of an internal combustion engine, otherwise not shown.
- the coating lance 20 can, for coating the inner wall of the cylinder bore 26, reach perpendicularly through the two penetration openings 18, 22 and protrude into the cylinder bore 26.
- Its tip-side burner which is not shown separately, generates a plasma mixed with coating particles for coating the inner wall of the cylinder bore 26.
- the particle dusts flowing back into the process box 10, some of which are already deactivated, but which are still active, are generated by an air stream 28 that flows from the air inlet 161 to the Air outlet 162 flows, grasped, diverted and carried away. As discussed in detail in the more general part of the description, they can be suctioned off without touching the wall.
- the flushing of the coating particles into the air flow 28 can be supported by an additional supply air flow through the cylinder bore 26. At the same time, further supply air can be sucked in through the gap 30 between the coating lance 20 and the edge of the upper access opening 18.
- a cleaning nozzle 32 is provided on the air inlet side of the lance 20, which is encapsulated by a deflector 34 on the side and on the air inlet side.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019124664.4A DE102019124664A1 (en) | 2019-09-13 | 2019-09-13 | Process box for a coating system |
PCT/EP2020/074628 WO2021047996A1 (en) | 2019-09-13 | 2020-09-03 | Process box for a coating system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP4028567A1 true EP4028567A1 (en) | 2022-07-20 |
EP4028567B1 EP4028567B1 (en) | 2023-11-08 |
Family
ID=72422167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20768007.5A Active EP4028567B1 (en) | 2019-09-13 | 2020-09-03 | Process box for a coating system |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4028567B1 (en) |
DE (1) | DE102019124664A1 (en) |
WO (1) | WO2021047996A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116904906B (en) * | 2023-09-12 | 2023-12-05 | 新疆坤隆石油装备有限公司 | Nickel-carbon compound plating processing device for inner hole surface of pump barrel of oil pump |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010060652A1 (en) * | 2010-11-18 | 2012-05-24 | Martinrea Honsel Germany Gmbh | Device for the thermal coating of cylinder inner surfaces in crankcases |
DE102017213359A1 (en) * | 2017-08-02 | 2019-02-07 | Volkswagen Aktiengesellschaft | Coating lance head, coating lance and masking plate for thermal coating, and a corresponding coating system and method |
DE102017127581B4 (en) * | 2017-11-22 | 2023-12-14 | Gebr. Heller Maschinenfabrik Gmbh | Device and method for coating an inner cylinder surface of a cylinder chamber of an engine block |
-
2019
- 2019-09-13 DE DE102019124664.4A patent/DE102019124664A1/en active Pending
-
2020
- 2020-09-03 WO PCT/EP2020/074628 patent/WO2021047996A1/en unknown
- 2020-09-03 EP EP20768007.5A patent/EP4028567B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP4028567B1 (en) | 2023-11-08 |
DE102019124664A1 (en) | 2021-03-18 |
WO2021047996A1 (en) | 2021-03-18 |
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