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EP2802421B1 - Dispositif de transport, de dosage et de mélangeage de peinture pour pistolet à peinture - Google Patents

Dispositif de transport, de dosage et de mélangeage de peinture pour pistolet à peinture Download PDF

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Publication number
EP2802421B1
EP2802421B1 EP13700179.8A EP13700179A EP2802421B1 EP 2802421 B1 EP2802421 B1 EP 2802421B1 EP 13700179 A EP13700179 A EP 13700179A EP 2802421 B1 EP2802421 B1 EP 2802421B1
Authority
EP
European Patent Office
Prior art keywords
paint
metering
wheels
another
components
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.)
Not-in-force
Application number
EP13700179.8A
Other languages
German (de)
English (en)
Other versions
EP2802421A1 (fr
Inventor
Joachim VOSSKUHL
Boris PETERS
Sibylle SCHÖPS
Monika TIGGEMANN
Werner-Alfons Jung
Andreas Bauder
Robert Engel
Wolfgang HAIP
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.)
BASF Coatings GmbH
Original Assignee
BASF Coatings GmbH
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 BASF Coatings GmbH filed Critical BASF Coatings GmbH
Priority to EP13700179.8A priority Critical patent/EP2802421B1/fr
Publication of EP2802421A1 publication Critical patent/EP2802421A1/fr
Application granted granted Critical
Publication of EP2802421B1 publication Critical patent/EP2802421B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
    • B01F35/883—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using flow rate controls for feeding the substances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • B05B12/1418—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet for supplying several liquids or other fluent materials in selected proportions to a single spray outlet
    • B05B12/1445—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet for supplying several liquids or other fluent materials in selected proportions to a single spray outlet pumping means for the liquids or other fluent materials being mechanically linked, e.g. master and slave pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/49—Mixing systems, i.e. flow charts or diagrams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/30—Mixing paints or paint ingredients, e.g. pigments, dyes, colours, lacquers or enamel

Definitions

  • the present invention relates to a combined paint delivery, paint dosing and paint mixing device for spray guns and a spray painting process using such a paint delivery device.
  • Spray painting without electrostatic paint charging are widely used in industrial and artisanal paint shops. Above all, the processes are distinguished from other painting methods in that they can be used manually, have high flexibility with regard to the shape, size and materials of the objects to be painted, as well as the choice of paint and the paint change, are mobile in use and entail relatively low investment costs ( H. Kittel, "Lehrbuch der Lacke und Be harshungen", Second Edition, Volume 9, pp. 26-40; S. Hirzel Verlag Stuttgart Stuttgart Stuttgart, 2004 ).
  • the spray painting processes can be distinguished essentially in compressed air spraying in the high pressure or low pressure method on the one hand, and airless spraying with or without air assistance.
  • the compressed air flows from an annular opening which is formed by a central bore in the air cap and the paint nozzle arranged therein. Further air jets from different air cap holes serve to regulate the jet shape and aid atomization. Due to the compressed air flowing out at high velocity, a negative pressure area is created directly at the paint nozzle mouth, especially in the case of the pressureless air Paint supply from a so-called suction cup the Lackaushne supported by its suction (H. Kittel, ibid).
  • the paint supply from a pressure tank by support with a pressure of 0.5 to 4 bar (usual tank capacity 1 to 250 liters).
  • the paint supply is carried out by piston or turbine pumps, the circulation system is typically used only meaningful with a daily consumption of more than 100 liters of the paint (H. Kittel, ibid).
  • the suction effect due to the negative pressure at the paint nozzle orifice of a so-called HVLP spray gun is lower than in high-pressure spraying, which is why support of the suction effect by the paint gradient pressure is desired, especially in the low pressure range. It is therefore advisable to work as a paint delivery system when processing small amounts of paint in low-pressure spraying with a flow cup system.
  • Two component (2K) coating agents are predominantly sprayed due to their limited processing time (pot life).
  • the dosage of stock and hardener is the central problem.
  • the 2K material is usually mixed manually in the specified ratio and as a One component material sprayed.
  • a fast drying and curing behavior of the paint film is desired, which is why curing catalysts are often incorporated into the base paint and / or hardener of the 2K or multi-component mixture.
  • the WO 93/13872 A1 describes a method for applying a multicomponent refinish coating composition wherein at least two paint components are held in separate containers and at least one component is supplied under pressure to a kinetic dosing system comprising two piston-mounted double-acting cylinders with cylinder rods. The metered components are fed to a mixer, which opens into a paint spray gun.
  • the structure of the metering device is rather complex and necessarily requires the admission of at least one paint reservoir with compressed air.
  • the US 2006/022067 A1 relates to a device according to the preamble of independent claim 1 of the present invention, in which the conveyor makes use of paddle wheels.
  • the device according to the invention is the device described in the independent claim 1.
  • paint reservoir includes, among other embodiments such as cups preferably gravity cup, disposable cartridges or bags and the like.
  • the paint reservoir has two or more chambers
  • these chambers can have any shape and be arranged as desired with respect to each other.
  • the chambers in a cup-shaped paint reservoir simply by a plate-shaped partition from each other be separate (see for example FIG. 2 ).
  • the paint component of the inner chamber then has to be conveyed through the wall of the outer chamber by means of a type of injector outlet, so that separate outlet openings for the paint components are retained and thus a separate metering is made possible.
  • the device unit comprises (a) i. two paint reservoirs for two different paint components or ii. a paint reservoir with two separate chambers for two different paint components, in particular in the case i. a paint reservoir for a master paint and a second paint reservoir for a hardener or in case ii. a paint reservoir with a first chamber for a parent lacquer and a second chamber for a hardener.
  • the paint reservoir has two outlet openings, one for the master paint and one for the hardener.
  • the metering device has in this embodiment according to two inlet openings, one for the parent lacquer and one for the hardener, as well as two outlet openings for the metered flow rates.
  • the volume flows of the components are supplied separately from one another to a rotating conveyor.
  • Each rotating conveyor is designed to consist of two intermeshing wheels.
  • a single rotating conveyor comprising a pair of wheels.
  • the intermeshing wheels of the wheel pair are gearwheels which are of oval design. It is thus according to the invention to Ovalradcrue.
  • the Wheels of the individual conveyors are interconnected so that their speeds are in fixed proportions. This is done, for example, by fastening at least one of the two intermeshing wheels of a conveyor, each with one of the two wheels of the other conveyors on one and the same shaft or axis.
  • the interconnected wheels of the conveyors thus act synchronously dependent on each other, while the respective second wheel of the respective pair of wheels can be stored freely, since this is taken over the first, synchronized wheel, that is driven.
  • This type of drive is referred to as forced delivery and is essential to compensate for the commonly present viscosity differences of the various components.
  • the wheel pairs are designed in terms of their size so that they are each promoted to be metered flow rates.
  • the spatial separation of the wheel pairs can be realized for example by partitions in the metering device. The separation of the flow rates prevents premature mixing of the various components in the conveyors.
  • the paint reservoir can be pressurized with compressed air.
  • the paint reservoir is closed, for example, with a pressure-tight lid, which has a compressed air inlet opening, which can be acted upon by compressed air. An external drive of the wheel pairs is not available.
  • the metering device is a completely closed unit and only via the inlet openings with the paint reservoirs or the paint reservoir or via the outlet opening (s) with the static mixer connected.
  • This construction of the metering device is low maintenance and energy efficient.
  • the paint reservoir or the paint reservoir can be closed with a vented lid.
  • the paint delivery takes place by additional loading of the paint components with compressed air, which are pressed from the paint reservoirs or the paint reservoir by the compressed air in the metering device.
  • the paint reservoir or the paint reservoir is a completely closed unit, which has only at least one inlet opening for compressed air and the outlet openings for metering.
  • the mixing device which also represents a completely closed unit, which is connected only via the inlet openings with the metering device and the outlet opening with the spray gun. Connected to each other can also mean that the mixing device is partially / completely integrated into the spray gun body.
  • the three device units can be connected to one another, for example, via pressure-tight threads or welded or glued together.
  • sealing rings and the like are used, as is known to the average person skilled in the art.
  • FIG. 2 describes the basic structure of a particular embodiment of the invention for the use of a 2K system using two different paint components.
  • a device according to the invention for conveying, dosing and mixing of liquid paint components comprises a Lackzu Foodvoriques (A), which comprises a paint reservoir (1), in turn, two by a partition wall (13) separate chambers (11 and 12) for different together comprising mixing liquid paint components, wherein the first chamber (11) has an outlet opening (14) and the second chamber (12) has an outlet opening (15).
  • the paint reservoir (1) has in this embodiment, a closable lid (6) via which through an opening (5) compressed air can be applied.
  • the particular embodiment of the device according to the invention comprises FIG.
  • the metering device is - as already described in detail above - designed so that the over the two inlet openings (21 and 22) entering the flow rates of the paint components to be mixed with each other are conveyed separately via serving as dosing, rotating conveyors.
  • the conveyors are connected to each other so that their speeds are in fixed proportions to each other.
  • the metered volume flows of the paint components are then supplied via the outlet openings (23 and 24) of the subsequent static mixing device (C or 3).
  • the static mixing device in this case has two inlet openings (31 and 32) and an outlet opening (4) for attachment of the device to the paint spray gun.
  • the static mixing device preferably comprises one or more so-called mixer rods (33).
  • the mixer rods / elements can be installed vertically, horizontally or in any other way, but they must ensure sufficient mixing of the components.
  • each rotating conveyor has a pair of wheels (251/252 or 261/262) and at least one wheel (251) of the pair of wheels (251/252) with the corresponding wheel ( 261) of the pair of wheels located in the adjacent conveyor (261/262) is connected via a common axis (27), so that their speeds are in fixed proportions to one another.
  • the axis (27) thus forces a synchronized rotation of the wheels 251 and 261, whereby a positive promotion of the volume flows takes place.
  • the respective second wheel of the two pairs of wheels can be mounted on its own axis (281 or 282) are stored. These second wheels (252, 262) are driven by the rotation of the first wheels (251, 261).
  • the materials of the three device units are chosen so that they are inert to the paint components to be mixed and meet the mechanical stresses.
  • abrasion-resistant plastics which are resistant to the coating components such as solvents, hardeners, etc., such as Teflon, polyoxymethylene, polyphenylsulfide, polypropylene, polyamide, polyetheretherketone or polyaryletherketone are particularly suitable.
  • dissipative materials must be selected to prevent electrostatic charging.
  • dissipative plastics with a resistance of less than 10 6 ohms are to be used. But also the production of the device units made of metallic materials is conceivable, albeit more expensive and less advantageous in particular because of the higher weight during manual operation of the spray gun.
  • the two or more chambers are separated by partitions (see FIG. 2 ).
  • partitions see FIG. 2 .
  • the volumes of the chambers are advantageously chosen to meet the needs of the components in the final mixture.
  • Ovalradstande are available inter alia from the company Bopp & Reuther under the trade name "Miniflow 015".
  • the desired ratio of the volume flows of the paint components is preferably adjusted via a width adjustment of the oval wheels.
  • the ratio of the volume flows of the paint components can also be set by other parameters such as wheel diameter or, when coupled via a transmission, speed ratios.
  • the static mixing device consists of a mixing tube with fixed internals.
  • mixer rods can be used.
  • Very particularly preferred mixer bars are available, for example, from the company Fluitec Georg AG (Neftenbach, Switzerland) under the name CSE-X® mixer.
  • spray guns that are used in compressed air spraying are suitable as spray guns.
  • the connection of the static mixing device with the spray gun is straightforward and can be done with all common compounds, preferably by a screw thread or quick couplings or dovetail joints.
  • Paint spray guns are available, for example, from Sata GmbH & Co. KG (Komwestheim, Germany) under the name SATAjet®, as HVLP or RP spray guns.
  • the individual device units can also be heated externally. However, this is usually not intended.
  • An essential component of the device according to the invention is a metering device according to independent claim 6.
  • the present invention also relates to a method for conveying, metering and mixing of two or more coating components which makes use of the device according to the invention and / or of the metering device according to the invention.
  • the present invention relates to a method for coating substrates with 2K or multi-component coating compositions using the device according to the invention in combination with a paint spray gun.
  • the coating process according to the invention is particularly advantageously carried out purely manually.
  • the inventive method for coating using small amounts of paint is suitable.
  • the process is carried out as a HVLP spraying process.
  • the aforementioned method can also be used in the context of OEM OEM painting especially in the so-called assembly repair.
  • the atomizing pressure is usually 1.5 to 2 bar. In the case of RP guns, work is usually carried out at an atomization pressure of 1.5 to 3 bar. In order to support the paint promotion can, or the paint reservoir can be pressurized with compressed air, the pressure can be adjusted depending on the paint viscosity and the amount of leakage.
  • the second component is the hardener.
  • hydroxy-functional polymers such as polyhydroxy-functional poly (meth) acrylates, polyester polyols, polyether polyols, polyurethane polyols or mixed polyester / polyether polyols used.
  • Polythiols for example, can be used.
  • the hardener components are usually polyisocyanates such as hexamethylene diisocyanate, tolylene diisocyanate, isophorone diisocyanate or diphenylmethane diisocyanate or the dimers, trimers and polymers of the aforementioned isocyanates, and / or aminoplast resins such as Melamine resins, used.
  • polyisocyanates such as hexamethylene diisocyanate, tolylene diisocyanate, isophorone diisocyanate or diphenylmethane diisocyanate or the dimers, trimers and polymers of the aforementioned isocyanates, and / or aminoplast resins such as Melamine resins, used.
  • epoxy systems both conventional and aqueous. Of course, it is also possible to use systems which only become reactive at atmospheric humidity (eg aldimines, silanes).
  • parent lacquer and hardener have compounds with complementary functional groups. That is, groups that react with each other after mixing the two components.
  • amine / isocyanate hydroxy / isocyanate, thiol / isocyanate, amine / epoxy / isocyanate, amine / epoxy, epoxy / anhydride, amine / Anhydride, anhydride / hydroxy or hydroxy / isocyanate / amine groups.
  • base lacquer and hardener react after application at temperatures of 0 to 100 ° C, preferably 10 to 80 ° C, that is under conditions conventional refinish conditions.
  • the paint used consists of the Glasuritklarlack 923-335 (BASF Coatings GmbH), which was mixed in a volumetric mixing ratio of 2: 1 with the hardener 929-33 (BASF Coatings GmbH) and processed with 10 vol% dilution 352-91.
  • the catalyst solution used was a mixture of 45 g of butyl acetate, 45 g of xylene and 10 g of DBTL (dibutyltin dilaurate).

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Nozzles (AREA)

Claims (7)

  1. Dispositif de transport, de dosage et de mélange de composants de peinture liquides, comprenant:
    (a) un dispositif de fourniture de peinture (A), qui
    i. comprend deux ou plusieurs réservoirs de stockage de peinture avec respectivement au moins une ouverture de sortie pour différents composants de peinture à mélanger les uns aux autres; ou
    ii. comprend un réservoir de stockage de peinture (1), qui comporte deux chambres (11, 12) ou plus de chambres pour différents composants de peinture à mélanger les uns aux autres, dans lequel chaque chambre possède au moins une ouverture de sortie,
    (b) un dispositif de dosage (B), qui est placé après le dispositif de fourniture de peinture et qui possède un nombre d'ouvertures d'entrée pour les composants de peinture qui correspond au nombre des ouvertures de sortie des réservoirs de stockage de peinture ou du réservoir de stockage de peinture (1), dans lequel le dispositif de dosage (B) est configuré de telle manière que les flux volumiques des composants de peinture à mélanger les uns aux autres qui entrent par les ouvertures d'entrée soient transportés de force séparément l'un de l'autre par des dispositifs de transport rotatifs servant d'ensembles de dosage sans entraînement externe, dans lequel les dispositifs de transport sont reliés les uns aux autres de telle manière que leurs vitesses de rotation restent dans des rapports fixes l'une par rapport à l'autre, et dans lequel le dispositif de dosage est muni d'ouvertures de sortie séparées pour les flux volumiques désormais dosés des composants de peinture, et
    (c) un dispositif de mélange statique (C), qui est placé après le dispositif de dosage (B) et qui possède un nombre d'ouvertures d'entrée pour les flux volumiques dosés qui correspond au nombre des ouvertures de sortie du dispositif de dosage (B), et dont la sortie est configurée de telle manière qu'elle puisse être raccordée à un pistolet à peinture,
    caractérisé en ce que chaque dispositif de transport rotatif présente une paire de roues et au moins une roue de la paire de roues est reliée à la roue correspondante de la paire de roues se trouvant dans le dispositif de transport voisin par un axe commun, de telle manière que leurs vitesses de rotation restent dans des rapports fixes l'une par rapport à l'autre et dans lequel les roues des paires de roues sont des roues ovales.
  2. Dispositif selon la revendication 1, dans lequel le réservoir de stockage de peinture (1) comporte deux chambres (11, 12) et les composants de peinture à mélanger l'un à l'autre sont une peinture de base et un durcisseur, dans lequel chaque chambre (11, 12) possède au moins une ouverture de sortie (14, 15), et le dispositif de dosage (B) possède deux ouvertures d'entrée (21, 22), respectivement une pour la peinture de base et une pour le durcisseur.
  3. Dispositif selon une des revendications 1 ou 2, dans lequel au moins un des réservoirs de stockage de peinture possède un couvercle refermable, par lequel de l'air comprimé peut être appliqué.
  4. Procédé de transport, de dosage et de mélange de deux ou plusieurs composants de peinture, caractérisé en ce que l'on utilise pour la mise en oeuvre du procédé un dispositif selon une ou plusieurs des revendications 1 à 3.
  5. Procédé de revêtement de substrats avec des agents de revêtement à deux ou plusieurs composants, caractérisé en ce que l'on raccorde pour l'application d'un revêtement un dispositif selon une ou plusieurs des revendications 1 à 3 à un pistolet à peinture, on transporte une peinture de base et un durcisseur via le réservoir de stockage de peinture (1) et le dispositif de dosage (B) dans le dispositif de mélange statique (C), on envoie le mélange homogène de peinture de base et de durcisseur obtenu au pistolet à peinture et on l'applique sur le substrat à l'aide de ce dernier.
  6. Dispositif de dosage (B), qui possède deux ouvertures d'entrée (21, 22) ou plus d'ouvertures d'entrée pour des composants à mélanger, dans lequel le dispositif de dosage (B) est configuré de telle manière que les flux volumiques des deux composants de peinture à mélanger l'un à l'autre qui pénètrent par les ouvertures d'entrée (21, 22) soient transportés de force séparément l'un de l'autre par des dispositifs de transport rotatifs servant d'ensembles de dosage sans entraînement externe, dans lequel les dispositifs de transport sont reliés les uns aux autres de telle manière que leurs vitesses de rotation restent dans des rapports fixes l'une par rapport à l'autre, et dans lequel le dispositif de dosage est muni d'ouvertures de sortie séparées pour les flux volumiques désormais dosés des composants de peinture, caractérisé en ce que chaque dispositif de transport rotatif présente une paire de roues et au moins une roue de la paire de roues est reliée à la roue correspondante de la paire de roues se trouvant dans le dispositif de transport voisin par un axe commun, de telle manière que leurs vitesses de rotation restent dans des rapports fixes l'une par rapport à l'autre et dans lequel les roues des paires de roues sont des roues ovales.
  7. Procédé de dosage synchronisé d'au moins deux flux volumiques séparés, dans lequel les flux volumiques sont envoyés au dispositif de dosage selon la revendication 6 et sont prélevés de celui-ci après le dosage.
EP13700179.8A 2012-01-13 2013-01-11 Dispositif de transport, de dosage et de mélangeage de peinture pour pistolet à peinture Not-in-force EP2802421B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13700179.8A EP2802421B1 (fr) 2012-01-13 2013-01-11 Dispositif de transport, de dosage et de mélangeage de peinture pour pistolet à peinture

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201261586203P 2012-01-13 2012-01-13
EP12151181 2012-01-13
PCT/EP2013/050511 WO2013104771A1 (fr) 2012-01-13 2013-01-11 Dispositif de transport, de dosage et de mélangeage de peinture pour pistolet à peinture
EP13700179.8A EP2802421B1 (fr) 2012-01-13 2013-01-11 Dispositif de transport, de dosage et de mélangeage de peinture pour pistolet à peinture

Publications (2)

Publication Number Publication Date
EP2802421A1 EP2802421A1 (fr) 2014-11-19
EP2802421B1 true EP2802421B1 (fr) 2017-03-15

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EP13700179.8A Not-in-force EP2802421B1 (fr) 2012-01-13 2013-01-11 Dispositif de transport, de dosage et de mélangeage de peinture pour pistolet à peinture

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Country Link
US (1) US20150036454A1 (fr)
EP (1) EP2802421B1 (fr)
ES (1) ES2631187T3 (fr)
WO (1) WO2013104771A1 (fr)

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EP3177391B1 (fr) 2014-08-05 2018-08-15 BASF Coatings GmbH Support de cartouches, cartouches à plusieurs chambres et dispositifs de dosage et de mélange les comprenant
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AU2018326211A1 (en) 2017-09-01 2020-02-27 Basf Coatings Gmbh Measuring and mixing devices
CA3072478A1 (fr) 2017-09-01 2019-03-07 Basf Coatings Gmbh Dispositifs de dosage et de melange
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WO2013104771A1 (fr) 2013-07-18
EP2802421A1 (fr) 2014-11-19
US20150036454A1 (en) 2015-02-05
ES2631187T3 (es) 2017-08-29

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