WO2018025222A8 - Device for the controlled reduction of the thickness of metallic coatings obtained with the technique of the hot bath in molten metal - Google Patents
Device for the controlled reduction of the thickness of metallic coatings obtained with the technique of the hot bath in molten metal Download PDFInfo
- Publication number
- WO2018025222A8 WO2018025222A8 PCT/IB2017/054765 IB2017054765W WO2018025222A8 WO 2018025222 A8 WO2018025222 A8 WO 2018025222A8 IB 2017054765 W IB2017054765 W IB 2017054765W WO 2018025222 A8 WO2018025222 A8 WO 2018025222A8
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- thickness
- coating
- machinery
- molten metal
- continuous
- Prior art date
Links
- 238000000576 coating method Methods 0.000 title abstract 6
- 239000002184 metal Substances 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 3
- 239000011248 coating agent Substances 0.000 abstract 4
- 238000003754 machining Methods 0.000 abstract 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000000151 deposition Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 238000005246 galvanizing Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000033764 rhythmic process Effects 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 230000003245 working effect Effects 0.000 abstract 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
- C23C2/18—Removing excess of molten coatings from elongated material
- C23C2/20—Strips; Plates
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0034—Details related to elements immersed in bath
- C23C2/00342—Moving elements, e.g. pumps or mixers
- C23C2/00344—Means for moving substrates, e.g. immersed rollers or immersed bearings
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/22—Removing excess of molten coatings; Controlling or regulating the coating thickness by rubbing, e.g. using knives, e.g. rubbing solids
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
The present invention discloses a machinery for depositing a metal coating on continuous sheet metal, by the hot bath technique, such as for example in hot-dip galvanizing processes. An important peculiarity of this machinery is the ability to fine- tune the thickness of the coating at intervals as wide as possible to effectively cover the widest range of orders. Indeed, actual industrial logic requires that these machines be used with fast and possibly continuous rhythms; and so it is very important that they can be used to carry out the widest range of machining operations, as the requests from the market are not always foreseeable. The machinery described here is therefore innovative as it uses two thickness adjustment stages that operates alternatively. In addition, the stage used for thinner coatings is particularly innovative as it is not based on technology (known in the art) which employs the so-called "air knives". In fact, the workings required to obtain thin thicknesses are carried out by means of a mechanical removal, which is designed to handle the major criticalities associated with this type of machining where a tool is expected to come into contact with the surface to be refined. This mechanical removal is made possible by the provision of a suitable gasket, replaceable when worn or too dirty, with which to make the spatula wire that physically reduces the thickness of the coating. These gaskets are made by means of an interlacement of different types of fibers joined together to form a cord. This is to provide a good grip and strength traction (to be able to stretch it well on the spatula wire), excellent abrasion resistance (in order tο limit wear and tear) and excellent resistance to temperature (since they must be able to be used in contact with the high temperatures of the molten metal). Furthermore, the cord is designed to have a good elastic deformability in the direction of its section, and adequate properties of repellency to the molten coating material, so as to avoid that it adheres on its surface and to facilitate fluid and continuous detachment without spraying in different directions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102016000082676 | 2016-08-05 | ||
| IT102016000082676A IT201600082676A1 (en) | 2016-08-09 | 2016-08-09 | CONTROLLED REDUCTION DEVICE OF THE THICKNESS OF METALLIC COATINGS OBTAINED WITH THE HOT BATHROOM TECHNIQUE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2018025222A1 WO2018025222A1 (en) | 2018-02-08 |
| WO2018025222A8 true WO2018025222A8 (en) | 2019-02-07 |
Family
ID=57906842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB2017/054765 WO2018025222A1 (en) | 2016-08-05 | 2017-08-03 | Device for the controlled reduction of the thickness of metallic coatings obtained with the technique of the hot bath in molten metal |
Country Status (2)
| Country | Link |
|---|---|
| IT (1) | IT201600082676A1 (en) |
| WO (1) | WO2018025222A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3260577A (en) * | 1961-12-20 | 1966-07-12 | Nat Steel Corp | Coated product and its manufacture |
| GB1131951A (en) * | 1965-06-08 | 1968-10-30 | Hitachi Ltd | Method of and apparatus for continuous hot dip metal coating |
| US3889018A (en) * | 1973-03-16 | 1975-06-10 | Ethyl Corp | Method of simultaneously coating the opposite sides of a paper web |
| CA1132011A (en) * | 1978-11-09 | 1982-09-21 | Bernard Schoeps | Process and apparatus for producing a sheet or strip which is lightly galvanized on one or both sides and products obtained by said process |
| WO1995028507A2 (en) * | 1994-04-08 | 1995-10-26 | Raymond Joseph Sartini | Process for continuous hot dip zinc coating of aluminum profiles |
| WO2013164493A1 (en) * | 2012-04-30 | 2013-11-07 | Eurostradale, S.L. | Device for reducing the thickness of a metallic coating on a metallic sheet |
-
2016
- 2016-08-09 IT IT102016000082676A patent/IT201600082676A1/en unknown
-
2017
- 2017-08-03 WO PCT/IB2017/054765 patent/WO2018025222A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018025222A1 (en) | 2018-02-08 |
| IT201600082676A1 (en) | 2018-02-09 |
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