EP0781170B1 - Dispositif de projection d'un revetement charge d'elements magnetiques - Google Patents
Dispositif de projection d'un revetement charge d'elements magnetiques Download PDFInfo
- Publication number
- EP0781170B1 EP0781170B1 EP95931244A EP95931244A EP0781170B1 EP 0781170 B1 EP0781170 B1 EP 0781170B1 EP 95931244 A EP95931244 A EP 95931244A EP 95931244 A EP95931244 A EP 95931244A EP 0781170 B1 EP0781170 B1 EP 0781170B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- gun
- ferrite ring
- magnetic
- magnetic elements
- 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
- 238000000576 coating method Methods 0.000 title claims description 28
- 239000011248 coating agent Substances 0.000 title claims description 27
- 229910000859 α-Fe Inorganic materials 0.000 claims description 24
- 239000007921 spray Substances 0.000 claims description 16
- 238000005507 spraying Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims 2
- 238000000034 method Methods 0.000 description 5
- 239000003973 paint Substances 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 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
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
-
- 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
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/12—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
Definitions
- the subject of the invention is a device for project a coating loaded with magnetic elements on surfaces of sizes and complexities different.
- the magnetic elements contained in it coating should be oriented.
- a known method for orienting the elements magnetic coating involves placing the surface to cover in a magnetic field and then to coat this surface with the adequate coating according to a classic technique for those skilled in the art. This technique is to use a pistol projection. According to this process, when the coating comes close to the surface to cover, magnetic elements, subject to the field magnetic reigning around the surface, are placed following the field lines created by this field magnetic. The coating including the magnetic elements are oriented can then be dried or polymerized.
- the object of the invention is precisely to remedy this disadvantage. To this end, it offers a system projection of a coating in which the field magnetic is created around the nozzle of the projection gun to orient the elements magnetic as soon as they come out of the gun.
- the invention relates to a device for spraying a loaded coating of magnetic elements, including a pistol projection suitable for projecting the coating onto a chosen surface.
- This projection device is characterized by the fact that it includes means orientation of the magnetic elements of the coating, these orientation means being fixed around the gun projection and ensuring the orientation of magnetic elements from out of the projection gun.
- the means of orientation include a ferrite ring surrounding the gun projection and around which is wrapped a electrical conductor connected to a source power supply to create inside of the ferrite ring a magnetic field.
- This ferrite ring has an air gap allowing, on the one hand, the passage of the coating when it is projected by the pistol and, on the other hand, the orientation of the magnetic elements of this projected coating.
- the orientation means include a shield cylinder positioned between the gun and ferrite ring to protect said magnetic field gun created by the ring of ferrite, and prevent the magnetized elements obstruct the gun.
- This shielding cylinder has an opening of section significantly greater than the section of the gap of the ferrite ring.
- the projection device according to the invention can be on a robot.
- the single figure schematically represents the device of the invention comprising a pistol projection surrounded by means to orient the magnetic elements of the coating.
- This device in perspective.
- This device includes a projection gun referenced 1.
- This spray gun projection is of a completely classic type. he can advantageously be automatic.
- This gun is connected to power supplies compressed air and coating, not shown on the figure for simplification.
- This figure also shows a ring of ferrite 3 arranged around this spray gun 1.
- This ferrite ring 3 is itself surrounded, at the less on one part, of an electrical conductor called winding wire 5.
- This winding wire 5, of preferably copper, is wound in multi-layers around the ferrite ring 3 and connected on a power supply 8 stabilized in direct current in order to create a magnetic field in ring 3.
- the ferrite ring 3 comprises an opening making an air gap 7. This opening allows the passage of the coating sent by the gun 1 towards the surface to be covered. The magnetic field reigning in this air gap 7 then makes it possible to orient the magnetic elements contained in the coating when the latter crosses the air gap 7 and until that it applies to the part to be coated.
- the ferrite ring 3 is made from nickel and zinc. It has a width of 90 mm, a diameter 280 mm outside, an inside diameter of 250 mm and therefore a thickness of 15 mm.
- the air gap 7 has a width of about 50 mm.
- a shielding cylinder 2 is positioned between the spray gun 1 and the ferrite ring 3. More precisely, the ring of ferrite 3 is fixed, by its inner face, on the shield cylinder 2. This shield cylinder 2 is able, moreover, to support the spray gun 1 which is fixed on the inside of this cylinder.
- this armor cylinder is made of mild steel and has a external diameter of 210 mm and a length of 200 mm.
- the shielding cylinder 2 prevents unwanted field lines do not disturb the supply of paint, resin or spray gun slip.
- this shielding cylinder 2 has an opening 4 substantially aligned with the air gap 7 to allow the passage of the coating from gun 1 to the surface to be covered.
- the pistol moves parallel by in relation to opening 4, i.e. in the direction suggested by the double arrow 9.
- the opening 4 of the shielding cylinder has a section significantly higher than that of the air gap 7 of so that the entire coating emitted by the gun 1 can be subjected to the magnetic field of air gap 7.
- the spray gun 1 is therefore centered at inside the shielding cylinder 2 then fixed on this shield cylinder so as to be in the axis of the ferrite ring 3. In this way, the nozzle of the projection gun opens into the air gap 7.
- the DC power supply must first be switched on so that a field magnetic be created in the air gap 7 of the ring of ferrite 3. Automatic projection of the coating can then be performed. Magnetic elements contained in the coating projected by the spray gun projection 1 are deposited on the surface to be covered after being referred from the moment of their passage in the air gap 7, until the moment of the application.
- the nozzle of the projection gun must be about a distance from the surface to be covered 70 to 80 mm, or 20 mm from the surface outside of the ferrite ring 3.
- the device described above is on board a robot.
- This device therefore has the advantage of allowing the covering of all types of surfaces and, in particular, surfaces located in hostile environments since it can be installed on a robot arm.
Landscapes
- Electrostatic Spraying Apparatus (AREA)
- Spray Control Apparatus (AREA)
- Nozzles (AREA)
Description
Claims (6)
- Dispositif de projection d'un revêtement chargé d'éléments magnétiques, comprenant un pistolet de projection (1) apte à projeter le revêtement sur une surface choisie,
caractérisé en ce qu'il comporte des moyens d'orientation (2, 3, 5) des éléments magnétiques du revêtement, ces moyens d'orientation étant fixés autour du pistolet de projection et assurant l'orientation des éléments magnétiques dès leur sortie du pistolet de projection. - Dispositif de projection selon la revendication 1, caractérisé en ce que les moyens d'orientation comprennent un anneau de ferrite (3) entourent le pistolet de projection et autour duquel est enroulé un fil conducteur d'électricité (5) connecté sur une source d'alimentation électrique (8) pour créer à l'intérieur de l'anneau de ferrite un champ magnétique.
- Dispositif de projection selon la revendication 2, caractérisé en ce que l'anneau de ferrite comporte un entrefer (7) permettant d'une part, le passage du revêtement lorsque celui-ci est projeté par le pistolet et, d'autre part, l'orientation des éléments magnétiques de ce revêtement projeté.
- Dispositif de projection selon la revendication 2 ou 3, caractérisé en ce que les moyens d'orientation comprennent un cylindre de blindage (2) positionné entre le pistolet et l'anneau de ferrite pour protéger ledit pistolet du champ magnétique créé par l'anneau de ferrite.
- Dispositif de projection selon les revendications 3 et 4, caractérisé en ce que le cylindre de blindage comporte une ouverture (4) de section sensiblement supérieure à la section de l'entrefer de l'anneau de ferrite.
- Dispositif de projection selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il est embarqué sur un robot (6).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9411016 | 1994-09-15 | ||
FR9411016A FR2724581B1 (fr) | 1994-09-15 | 1994-09-15 | Dispositif de projection d'un revetement charge d'elements magnetiques |
PCT/FR1995/001180 WO1996008316A1 (fr) | 1994-09-15 | 1995-09-14 | Dispositif de projection d'un revetement charge d'elements magnetiques |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0781170A1 EP0781170A1 (fr) | 1997-07-02 |
EP0781170B1 true EP0781170B1 (fr) | 1998-12-09 |
Family
ID=9466965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95931244A Expired - Lifetime EP0781170B1 (fr) | 1994-09-15 | 1995-09-14 | Dispositif de projection d'un revetement charge d'elements magnetiques |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0781170B1 (fr) |
DE (1) | DE69506568T2 (fr) |
FR (1) | FR2724581B1 (fr) |
WO (1) | WO1996008316A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19635830A1 (de) * | 1996-09-04 | 1998-03-05 | Weitmann & Konrad Fa | Vorrichtung und Verfahren zum Bestäuben bahn- oder blattförmiger Produkte |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2846623A1 (de) * | 1978-10-26 | 1980-05-08 | Basf Ag | Verfahren zur herstellung von schichtmagnetogrammtraegern |
JPS61122928A (ja) * | 1984-11-16 | 1986-06-10 | Fujitsu Ltd | 磁気デイスク媒体の製造方法 |
-
1994
- 1994-09-15 FR FR9411016A patent/FR2724581B1/fr not_active Expired - Fee Related
-
1995
- 1995-09-14 DE DE69506568T patent/DE69506568T2/de not_active Expired - Fee Related
- 1995-09-14 EP EP95931244A patent/EP0781170B1/fr not_active Expired - Lifetime
- 1995-09-14 WO PCT/FR1995/001180 patent/WO1996008316A1/fr active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
FR2724581B1 (fr) | 1996-12-06 |
EP0781170A1 (fr) | 1997-07-02 |
DE69506568D1 (de) | 1999-01-21 |
WO1996008316A1 (fr) | 1996-03-21 |
FR2724581A1 (fr) | 1996-03-22 |
DE69506568T2 (de) | 1999-06-24 |
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