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WO2004091805A1 - Dispositif et procede pour enduire des pieces plates - Google Patents

Dispositif et procede pour enduire des pieces plates Download PDF

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Publication number
WO2004091805A1
WO2004091805A1 PCT/EP2004/003586 EP2004003586W WO2004091805A1 WO 2004091805 A1 WO2004091805 A1 WO 2004091805A1 EP 2004003586 W EP2004003586 W EP 2004003586W WO 2004091805 A1 WO2004091805 A1 WO 2004091805A1
Authority
WO
WIPO (PCT)
Prior art keywords
substrate
coating
powder
coating material
atomizing
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.)
Ceased
Application number
PCT/EP2004/003586
Other languages
German (de)
English (en)
Inventor
Markus Cudazzo
Ulrich Strohbeck
Markus Beckmann
Sascha Hermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Publication of WO2004091805A1 publication Critical patent/WO2004091805A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C19/00—Apparatus specially adapted for applying particulate materials to surfaces
    • B05C19/02—Apparatus specially adapted for applying particulate materials to surfaces using fluidised-bed techniques
    • B05C19/025—Combined with electrostatic means
    • 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
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/047—Discharge apparatus, e.g. electrostatic spray guns using tribo-charging

Definitions

  • the present invention relates to a device and a method for coating a substrate, in particular a flat substrate, with a liquid or particulate coating material.
  • a substrate in particular a flat substrate
  • a liquid or particulate coating material Such methods are required in particular in the area of powder coating applications on flat materials.
  • Suitable areas of application are, for example, steel and aluminum strip material (coil), metal and plastic foils, paper webs, for example wallpaper, sheet metal plates and extruded materials (profiles, pipes), plastic plates, wood and wood-based material plates, for example MDF (medium-density fibreboard) or HDF (high-density fibreboard), rock wool-based acoustic insulation panels, both flat materials without edge coating and flat or profiled panels in which the edge is also coated.
  • MDF medium-density fibreboard
  • HDF high-density fibreboard
  • rock wool-based acoustic insulation panels both flat materials without edge coating and flat or profiled panels in which the edge is also coated.
  • the powder In the electrostatic powder spray process (EPS process), the powder is fluidized using air and transported via a hose to the spraying device, where it is electrostatically charged and sprayed onto the substrate using nozzles.
  • the deposited powder particles are deposited on the grounded substrate by electrostatic attractive forces. Since only a portion of the sprayed powder reaches the substrate, the non-separated powder (overspray) is removed from the coating booth by suction and returned to the powder container.
  • the spraying units are moved up and down (vertical substrate arrangement) or back and forth (horizontal substrate arrangement) by means of an automatic lifting device in order to be able to coat all areas of the substrates moved past the spraying elements by means of a conveying device by overlapping the coating strips.
  • the EPS process is suitable for substrate conveying speeds of up to approx. 15 m / min.
  • the main disadvantages of the EPS process are
  • the high air volume flows or air flow velocities when spraying the powder onto the substrates and the resulting turbulence, combined with layer thickness fluctuations and particle size separations, which lead to shifts in the particle size spectrum in the powder cycle and thus to coating defects which are required at high substrate conveying speeds Stroke speeds of the spraying units, which lead to additional air flow turbulence in the spray jet area and thus to additional layer thickness fluctuations, as well as the high system and process engineering effort for the recovery and recycling of the powder that is not deposited on the substrates, especially when using different colored powders.
  • the applicable ' layer thickness for the EPS process is in the range of approx. 30-200 / im. Thin-film applications with layer thicknesses ⁇ 30 ⁇ m are generally not possible with this technique, since under-coated areas are unavoidable given the usual fluctuations in layer thickness.
  • the substrates are not sprayed directly, but coated in a cloud of charged powder within a chamber or above a fluidizing tank.
  • the powder particles are not deposited on the substrates here, as in the EPS process, by the combination of spraying with air and electrostatic attraction, but exclusively by electrostatic forces.
  • Disadvantages of this method are, in particular, the limited amount of powder that can be deposited per unit of time and the resultant only low throughput of surface to be coated or the only low process speeds as well as the inaccurate and difficult to control metering of the applied amount of powder and the associated fluctuations in the layer thickness.
  • the achievable layer thicknesses in the electrostatic whirl bath process are in the same range as in the EPS process, i.e. at approx. 30 to 200 ⁇ m. Thin-film applications are generally not possible here either due to the process-related fluctuations in layer thickness.
  • the object of the present invention is therefore to provide a method and a device with which liquid or particulate coating materials, in particular powders, can be applied in layers of a defined thickness with high constancy and at high process speeds, preferably to flat parts.
  • This object is achieved by the device according to claim 1 and the method according to claim 22.
  • the coating material in particular powder
  • This device serves as an electrode. It is constructed in an electrically insulated manner and has a high voltage between 5 and 100 kV (positive or negative).
  • a roller brush for example with brush hair made of metal or electrically conductive or semiconductive plastic or ceramic, a rotating cell wheel, a rotating braid, for example made of wire, rotating steel wool or also a vibrating brush or other vibrating objects made of electrically conductive or semi-conductive material are used.
  • the electrically conductive and / or semiconductive materials advantageously have a volume resistance 10 10 11 ohms.
  • This means has an electrically insulated structure and has, for example, a sliding contact or a contact via a ball bearing to a high-voltage generator. In the case of a rotating brush 'and the like, it can at a speed of between 1 and 100 rpm.
  • the powder is charged by contact with the brush and the corona that occurs, and atomized electrostatically and mechanically by the movement of the agent.
  • the powder deposits on the substrate by means of electrostatic forces.
  • an electrically conductive grounded substrate for example a metallic coil
  • no further support for the deposition process is required.
  • the deposition can be supported on the back of the substrate by using a charge which is counterpolar to the powder, for example unipolar ionized air.
  • the method and the device according to the invention now have a number of advantages over the prior art.
  • many substrates previously " predominantly or exclusively coated with wet paint application techniques can be powder coated in the future.
  • the agent for atomizing the coating material here producing fine electrically charged paint droplets.
  • the device according to the invention and the method according to the invention are particularly suitable for high throughput speeds of the substrate to be coated in the range up to 3 m / s.
  • the method is also suitable for applications in which only a small amount of coating layering material or a thin coating is applied.
  • powder layers in particular can thus be defined and applied with a hitherto impossible constancy even at high process speeds.
  • Flat parts are preferably coated with the present invention. However, it is also possible to coat profiled flat parts or edges.
  • the powder material is transferred to the substrate without losses, i.e. Complex technical measures for the recovery and circulation of the powder not deposited on the substrate, as they have been required in the previous electrostatic powder application by means of spray organs, are no longer required. This is associated with less space requirement and lower investment costs. Since the powder is not sprayed on as with conventional technology, the associated high compressed air consumption is eliminated.
  • the method according to the invention requires because of the unnecessary recovery system, the color change is also much easier than with conventional powder coating systems, .-:.,
  • the layer thickness fluctuations and particle size separations customary in the electrostatic powder coating processes according to the prior art do not occur.
  • the amount of powder to be transferred can be reproducibly controlled over a wide range, so that constant layer thicknesses can be generated both at low and at high conveying speeds of the substrate. In particular, very thin layers down to a few ⁇ m thickness can be reproducibly produced.
  • the process according to the invention thus not only replaces the EPS processes which have hitherto been used for powder coating, but also, in particular, also "different wet coating application processes "such as casting processes, roller application processes or compressed air and airless atomization in flat coating machines.
  • the coating material is fed from a fluidizing container into which, for example, the agent for further atomizing the coating material is partially immersed.
  • the powder can also be preloaded in the fluidizing container, as is already known in electrostatic fluidized beds with the help of unipolar ionized air.
  • the coating material can also consist of a gap or a Solutions of a fluidizing container are trickled into the area of influence of the atomizing agent.
  • the powder can be preloaded electrostatically in the fluidizing container.
  • a transfer device for example a transfer belt or a transfer roller, which is coated with coating material by means of an electrostatic fluidized bed in a fluidizing container.
  • the transfer belt or the transfer roller can also be immersed in the fluid bed. The coating material is then removed by the atomizing agent from the transfer belt or the transfer roller, electrostatically charged and further atomized and then applied to the substrate.
  • the transfer belt and / or the transfer roller advantageously have, in particular on their surface receiving and transferring the coating material, an electrical valley width of the or insulating material or consist thereof, advantageously with a volume resistance ⁇ 10 7 ⁇ , advantageously between 10 7 ⁇ and 10 18 ⁇ , advantageously between 10 9 ⁇ and 10 18 ⁇ .
  • the applied powder in the fluidizing container is continuously replaced by powder metering in order to ensure a constant filling level and thus constant powder quantities transferred to the substrate.
  • the first atomizing agent for example the brush
  • the first atomizing agent can also face at an angle around the axis perpendicular to the plane that is spanned by the planar extent of the substrate the substrate or the substrate transport direction may be arranged rotated.
  • the substrate for example plates to be coated
  • the substrate can also be arranged with its front edge obliquely instead of transversely to its transport direction, so that in all cases the front and rear edge or the lateral edges are opposite the line on which the substrate passes the atomizing agent is applied, is twisted. In this case, it is then also possible to coat lateral edges and profiles.
  • further high-voltage electrodes can also be arranged between the first sputtering agent and the substrate, as is known, for example, from the so-called MSC method (Material Science Corporation, see, for example, US Pat. No. 5,769,276 A).
  • MSC method Magnetic Science Corporation, see, for example, US Pat. No. 5,769,276 A.
  • the coating powder is corona charged exclusively by wire electrodes which are arranged directly in front of the " substrate " .
  • wire electrodes can also be used in the present method in order to increase the electrostatic charge due to the corona discharge of the atomizing agent.
  • the device according to the invention and the method according to the invention are variable from very low conveying speeds ⁇ 0.01 m / s (for example metered via transfer belt or transfer roller) to over 3 m / min (for example via a trickling method) from a metering gap of a fluidizing container) adjustable.
  • the powder mass flow to be metered can therefore, depending on the conveying speed and coating width, between 0.1 g / s and 5000 g / s, advantageously between see 1 g / s and 500g / s or even outside of these values.
  • the useful width of the present device is very variable and can be, for example, between 1 mm and 10 m, advantageously between ⁇ 10 mm and over 2 m.
  • the method according to the invention can be used, in particular, to process electrically insulating or also electrically conductive powders, since the powder is charged by means of a corona using the atomizing agent, for example a rotating brush. ⁇
  • FIG. 1 to 8 show various devices according to the invention for coating substrates, for example strips (coils) or plates with powder or droplet-shaped coating material
  • FIG. 9 shows various means for further atomizing and electrostatically charging the coating material.
  • FIG. 1 shows a device for coating a flat substrate 8 with a coating material 5, for example a powder.
  • the substrate 8 is transported in the direction of arrow B by means of a transport device, not shown, and is grounded.
  • a fluidizing container 1 with a fluid made of powder particles.
  • the fluidizing air is supplied to this fluidizing container via a nozzle 3 in the direction of arrow A.
  • Room 4 above the fluid bed 2 is a high voltage roller 7 with wire brush hair. This high-voltage roller 7 rotates in the direction of arrow D and dips with its brush hair into the fluid bed 2. It essentially serves to transfer and charge the powder
  • This brush 7 is stored in an insulated manner and is connected to a high-voltage source, for example, via sliding contacts.
  • a brush 10 which consists of metal and is mounted in an electrically insulated manner as a means for further atomizing the coating material 5. It is also connected to a high voltage source with a voltage between 1 and 500 kV. This brush now rotates at a speed between 0.1 U / s and 500 U / s, advantageously between
  • the powder is both mechanically atomized by this brush and electrically charged via corona discharge, so that a very fine, very strongly electrostatically charged powder cloud is formed above the substrate 8. This is deposited as a coating 9 on the substrate 8 when the substrate 8 is moved in the direction of the arrow B.
  • the fluidizing air can also be unipolarly ionized, so that a first electrostatic charging of the powder 5 takes place in the fluid bed 2.
  • substrates inter alia, band-shaped substrates (coil) can be coated or also plate-shaped substrates, such as MDF boards and the like.
  • Cellular wheels, vibrating strip brushes, various wire meshes or steel wool or also other electrically chargeable and movable means are suitable as alternatives to the rotating brush in the devices shown.
  • FIG. 2 shows a device similar to that in FIG. 1, in which case now no flat band-shaped substrate 8 is coated, but rather a plate-shaped substrate 8a to 8c.
  • This is mounted on a conveyor belt 12 as a transport device, which in turn is grounded and moves the substrate in the direction of arrow B.
  • this arrangement is identical to that in FIG. 1, but it is doubled in mirror symmetry.
  • FIG. 2A shows a top view of the arrangement of the substrates 8a-8c and the brushes 10a, 10b from FIG. 2B.
  • the substrates 8a to 8c are aligned parallel to the transport direction B, ie their side edges are parallel and their front and rear edges are oriented transversely to the transport direction B.
  • the fluidizing container 1, the outlets 6a, 6b and the brushes 10a and 10b are arranged at an angle to the line of the front and rear edges of the substrates 8a-8c.
  • the side edges of the substrates 8a, 8b are also coated by the powder 5a, 5b.
  • FIG. 3 shows a further device in which, as can be seen in FIG. 3C, a fluidizing container 1 with a fluid bed 2 is arranged above a band-shaped substrate 8. This substrate 8 is grounded and is transported in the direction of arrow B.
  • the fluidizing container 1 now has a trickle opening 6a, 6b in the direction of movement B of the substrate 8 on the front and rear, through which the powder 5a, 5b is sprinkled onto roller brushes 10a, 10a 'and 10b, 10b'.
  • roller brushes 10a, 10a 'and 10b, 10b' are arranged in pairs with mutually parallel axes of rotation, rotate in opposite directions in the direction of the arrows Cl, Cl 'in FIG. 3A and are charged with high voltage. These brushes therefore lead to mechanical atomization of the pulse verse 5a or 5b and a strong electrostatic charge due to the corona.
  • 8 3B shows an arrangement in which plates 8 are arranged on a conveyor belt 12, the axis of rotation of the brushes 10a, 10a ', 10b, 10b', the longitudinal axes of the trickle openings 6a, 6b and the orientation of the fluidizing container 1 transversely to the direction of transport B. are arranged at an angle between 0 ° and 90 °. In this way, in turn, a front and back coating and in particular a lateral edge coating of the plates 8 can be achieved.
  • Suitable as trickle openings 6a, 6b are, on the one hand, gap-shaped trickle openings or also a series of punctiform trickle openings.
  • a modification of the device according to FIG. 3, as shown in FIG. 4, can be used for a vertical coating.
  • a fluidizing container 1 is again provided, which has trickling openings 6a, 6b.
  • a high-voltage roller brush 10a, 10b is arranged, which atomizes the trickling powder 5 and charges it electrically.
  • the roller brushes 10a, 10b are shielded by baffles 11a, 12a and 11b, 12b so that they form a powder channel directed in the direction of the substrate 8. As a result, the powder is directed directly from the roller brushes 10a, 10b onto the substrate.
  • FIG. 5 shows a further device, in which case the substrates in the form of plates 8a to 8f are suspended vertically on a transport device 14, 15.
  • This transport device 14 transports the substrates 8a to 8f past a fluidizing container 1 with a nozzle 3 for the supply of fluidizing air.
  • a roller brush 10 ' is also arranged vertically between the fluidizing container 1 and the substrates 8a to 8f, ie with a vertical axis of rotation.
  • trickle openings 6a to 6f are arranged in the fluidizing tank. This size of the opening of the trickle openings 6a to 6f decreases downwards.
  • FIG. 6B shows a further device according to the invention, in which a transfer device 20, 21a-21c, 22 is arranged between the fluidizing container 1 and the roller brush 10 carrying high voltage.
  • a transfer belt 20 is used as the transfer device, which is guided past the brush 10 directly via deflection rollers 21a, 21b, 21c.
  • the transfer belt 20 is transported in the direction of the arrows E to the fluidizing container 1 and is immersed there in the fluid bed 2. It picks up powder 5 and in turn is guided to brush 10 with this powder.
  • the brush 10 strips this powder from the transfer belt, atomizes it and charges it electrostatically. In turn, a powder cloud is generated, which is deposited as a coating 9 on a strip-shaped substrate 8. Both the substrate 8 and the deflection rollers 21a, 21b, 21c and the transfer belt 20 are grounded.
  • FIG. 6A shows a detail from the coating area in FIG. 6B.
  • the transfer belt 20 is passed directly past the brush 10, which rotates in the direction of the arrow C.
  • the powder 5 adhering to the transfer belt 20 and already electrically charged in the fluidizing bed 2 is stripped from the transfer belt 20 by the brush 10 and further electrostatically charged due to the high voltage of the brush by means of corona discharge.
  • the powder is thrown by the brush in the direction of arrow H to the substrate 8 and deposited there as a coating 9.
  • FIG. 7 shows a further device according to the invention, in which, however, a roller 23 is used as the transfer device, which moves in the direction of the arrow G.
  • This roller is immersed in the fluidizing container 1 in the space 4 above the fluid bed 2. It is itself grounded and picks up electrostatically charged powder 5 as a coating. However, the powder 5 is previously leading, in the direction of arrow D rotating roller 7 electrically charged, which dips into the fluid bed 2. As a result, the powder 5 adheres to the grounded roller 23.
  • a means 10 for example a roller brush 10, for further atomization of the powder 5.
  • This roller brush 10 carries high voltage, strips the powder 5 from the transfer roller 23 and charges it electrostatically and atomizes it mechanically on top of that.
  • the electrostatically charged powder 5 is spun by the brush 10 in the direction of the substrate 8 and deposited there as a coating 9.
  • FIG. 8 shows a further corresponding device as in FIG. 7, but here the brush 10, which rotates in the direction of the arrow C, is further away from the substrate 8.
  • the metering or trans ' fex ' roller 23 or transfer roller 23 is conductive and grounded and has a jacket made of insulating material.
  • the metering roller 23 is thus constructed as in FIG. 7.
  • the metering roller 23 is immersed both in the fluid bed 2 and in the space 4 above the fluid bed. In contrast to FIG. 7, no roller 7 is provided, but the powder 5 is already electrostatically charged by means of unipolar 'ionized fluidizing air, so that it is deposited on the metering roller 23. Between the metering roller 23 and the wall of the fluidizing container 1 there is a gap 24 in the area of the fluid bed 2. If this is chosen small enough, for example less than approx. 5 mm, advantageously less than approx. 1 mm, dg.s. powder-coated ver do not flow out of the fluid bed 2 through this gap 24. This ensures the seal between the fluidizing container 1 and the roller 23.
  • the high-voltage brush 10 now removes the powder 5 from the metering roller 23, charges it electrostatically and generates a powder jet in the direction of the substrate 8, where the powder 5 is deposited as a coating 9.
  • All embodiments with transfer devices as shown in FIGS. 6 to 8 have the advantage that a very precise and also low dosage of the powder 5 can be achieved by means of a trans er device. This allows very thin and homogeneous coatings 9 to be produced on substrates 8.
  • FIG. 9 shows different variants of a first means for further atomizing the coating material, which can be placed on high voltage.
  • 9 shows a cellular wheel sluice 10, which is mounted on an axis 24 and can rotate in the direction of the arrow C.
  • a rotary valve can be used instead of the rotating brushes described in the previous examples.
  • a rotating wire mesh 10 is shown, which has a central axis 24 and arranged thereon a wire mesh made of wires 25. This wire mesh can also rotate about the longitudinal axis of the shaft 24 in the direction of arrow C.
  • FIG. 9C shows a strip brush 10 which also has a shaft 24 as a bearing axis with brush hairs 26 arranged thereon.
  • These inguinal Brush 10 can now be moved back and forth in the direction of arrow C, ie vibrate. The same atomization effect is achieved by such a vibration movement as was shown in the previous examples for a rotating brush.
  • This strip brush 10 can also be applied to high voltage in order to achieve electrostatic charging of the atomized powder.
  • FIG. 9D shows a brush 10 made of steel wool 27 which can be rotated in the direction of arrow C about the longitudinal axis of a shaft 24.
  • the steel wool braid 27 surrounds the shaft 24 instead of brush hair and produces the same atomizing effect as a brush with hair.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un dispositif et un procédé servant à enduire un substrat (8), notamment un substrat plat (8), à l'aide d'une matière d'enduction liquide ou particulaire (5). De tels procédés sont notamment nécessaires dans le domaine des applications de peinture en poudre sur des matériaux plats. Des domaines d'application appropriés sont, par exemple, les feuillards d'acier et d'aluminium, les films métalliques et plastiques, les bandes de papier, par exemple les papiers peints, les flancs de tôle ainsi que les matériaux d'extrusion (profilés, tuyaux), les panneaux en plastique, les panneaux en bois et en matériau dérivé du bois, par exemple les panneaux de fibres de densité moyenne ou élevée, et les panneaux isolants acoustiques à base de laine de roche. Ces procédés concernent aussi bien des matériaux plats sans enduction des chants que des panneaux plats ou profilés dans lesquels le chant est également enduit. Le dispositif selon l'invention est caractérisé en ce qu'au moins un premier moyen électroconducteur et/ou semi-conducteur, pouvant être mis sous haute tension, est placé entre l'orifice de sortie d'un dispositif de pulvérisation et un dispositif de transport pour le substrat (8) et sert à poursuivre la pulvérisation de la matière d'enduction (5).
PCT/EP2004/003586 2003-04-17 2004-04-05 Dispositif et procede pour enduire des pieces plates Ceased WO2004091805A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003117919 DE10317919B4 (de) 2003-04-17 2003-04-17 Vorrichtung und Verfahren zur Beschichtung eines Substrates mit einem flüssigen oder partikulären Beschichtungsmaterial
DE10317919.4 2003-04-17

Publications (1)

Publication Number Publication Date
WO2004091805A1 true WO2004091805A1 (fr) 2004-10-28

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010019612A1 (de) 2010-05-06 2011-11-10 Dürr Systems GmbH Beschichtungseinrichtung, insbesondere mit einem Applikationsgerät, und zugehöriges Beschichtungsverfahren, das einen zertropfenden Beschichtungsmittelstrahl ausgibt

Citations (5)

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Publication number Priority date Publication date Assignee Title
US2370636A (en) * 1933-03-23 1945-03-06 Minnesota Mining & Mfg Manufacture of abrasives
GB1161430A (en) * 1965-10-20 1969-08-13 Bethlehem Steel Corp Strip Coating Method and Apparatus
US4027607A (en) * 1976-04-20 1977-06-07 Continental Can Company, Inc. Pulsed powder application system
US5335828A (en) * 1990-12-27 1994-08-09 Matsuo Sangyo Co., Ltd. Paint powder supply device
EP0818246A2 (fr) * 1996-07-10 1998-01-14 Material Sciences Corporation Atomiseur de poudre

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Publication number Priority date Publication date Assignee Title
DE4328088B4 (de) * 1993-08-20 2005-05-25 Artur Prof. Dr. Goldschmidt Verfahren zum Beschichten von Werkstücken mit organischen Beschichtungsstoffen
US5518546A (en) * 1994-10-05 1996-05-21 Enexus Corporation Apparatus for coating substrates with inductively charged resinous powder particles
DE19623367C1 (de) * 1996-06-12 1997-11-06 Gema Volstatic Ag Pulver-Sprühbeschichtungsvorrichtung
US6197114B1 (en) * 1998-11-05 2001-03-06 Material Sciences Corporation Power feeding apparatus having an adjustable feed width
DE10010205C2 (de) * 2000-03-02 2003-01-09 Koenig & Bauer Ag Einrichtung zur axialen Einstellung von Bremsstationen in Saugwalzen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2370636A (en) * 1933-03-23 1945-03-06 Minnesota Mining & Mfg Manufacture of abrasives
GB1161430A (en) * 1965-10-20 1969-08-13 Bethlehem Steel Corp Strip Coating Method and Apparatus
US4027607A (en) * 1976-04-20 1977-06-07 Continental Can Company, Inc. Pulsed powder application system
US5335828A (en) * 1990-12-27 1994-08-09 Matsuo Sangyo Co., Ltd. Paint powder supply device
EP0818246A2 (fr) * 1996-07-10 1998-01-14 Material Sciences Corporation Atomiseur de poudre

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DE10317919B4 (de) 2005-12-01
DE10317919A1 (de) 2004-11-18

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