EP3702045B1 - Tête d'impression et procédé opérationel correspondant - Google Patents

Tête d'impression et procédé opérationel correspondant Download PDF

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Publication number
EP3702045B1
EP3702045B1 EP20170976.3A EP20170976A EP3702045B1 EP 3702045 B1 EP3702045 B1 EP 3702045B1 EP 20170976 A EP20170976 A EP 20170976A EP 3702045 B1 EP3702045 B1 EP 3702045B1
Authority
EP
European Patent Office
Prior art keywords
print head
rinsing
agent
coating
coil
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.)
Active
Application number
EP20170976.3A
Other languages
German (de)
English (en)
Other versions
EP3702045A1 (fr
Inventor
Hans-Georg Fritz
Benjamin WÖHR
Marcus Kleiner
Moritz BUBEK
Timo Beyl
Frank Herre
Steffen Sotzny
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.)
Duerr Systems AG
Original Assignee
Duerr Systems AG
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 Duerr Systems AG filed Critical Duerr Systems AG
Publication of EP3702045A1 publication Critical patent/EP3702045A1/fr
Application granted granted Critical
Publication of EP3702045B1 publication Critical patent/EP3702045B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • B05B12/149—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 characterised by colour change manifolds or valves therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • B05B1/3053—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice the actuating means being a solenoid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0447—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles
    • B05B13/0452—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles the conveyed articles being vehicle bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • B05B15/555—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids discharged by cleaning nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/1707—Conditioning of the inside of ink supply circuits, e.g. flushing during start-up or shut-down
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2103—Features not dealing with the colouring process per se, e.g. construction of printers or heads, driving circuit adaptations

Definitions

  • the invention relates to a print head for applying a coating agent to a component, in particular for painting a motor vehicle body component with a paint.
  • the invention further comprises an operating method for such a print head.
  • rotary atomizers are usually used as application devices, but these have the disadvantage of a limited application efficiency, i.e. only part of the applied paint is deposited on the components to be coated, while the rest of the applied paint has to be disposed of as a so-called overspray.
  • print heads as application devices, as they are, for example DE 10 2013 002 412 A1 , US 9,108,424 B2 and DE 10 2010 019 612 A1 are known.
  • print heads do not emit a spray mist of the paint to be applied, but a spatially narrowly limited paint jet that is almost completely reflected on the component to be painted, so that almost no overspray occurs.
  • Such print heads have control valves to control the coating agent discharge, wherein Figure 1 shows a schematic representation of such a control valve, which is arranged in a print head.
  • a nozzle opening 2 is located in a nozzle plate 1, which is either released or blocked by the control valve.
  • the nozzle plate 1 in addition to the nozzle opening 2, there are further nozzle openings which are each controlled by a separate control valve, these further nozzle openings not being shown for the sake of simplicity.
  • the print head also contains a base plate 3 which delimits a coating agent feed 4, i.e. the paint to be painted is fed via the coating agent feed 4 and can then exit through the nozzle opening 2 when the control valve is open.
  • a coating agent feed 4 i.e. the paint to be painted is fed via the coating agent feed 4 and can then exit through the nozzle opening 2 when the control valve is open.
  • a coil tube 5 is arranged on the top of the base plate 3 and a coil 6 is wound on the outside.
  • a magnetic coil core 7 which is arranged in a stationary manner and is sealed off from the coil tube 5 by a seal 8.
  • a magnetic armature 9 in the coil tube 5 which can also be referred to as a valve needle and, depending on the energization of the coil 6, can be displaced in the direction of the double arrow in order to either open or close the nozzle opening 2.
  • the armature 9 carries a seal 10 at its lower end in order to seal the nozzle opening 2 in the illustrated closed position so that no paint can escape from the nozzle opening 2.
  • control valve also has a return spring 11, which the armature 9 and thus also the seal 10 in the drawing pushes down into the illustrated closed position.
  • the coil 6 is energized in such a way that the armature 9 with the seal 10 is actively pulled upward in the drawing, namely against the spring force of the return spring 11.
  • the coil 6 is de-energized so that the return spring 11 can press the armature 9 and thus also the seal 10 downward in the drawing into the illustrated closed position.
  • the disadvantage of this known control valve is the fact that the interior of the control valve and in particular an interior 12 of the coil tube 5 is exposed to the paint.
  • paint residues in the interior 12 of the coil tube 5 can impair the functionality of the control valve.
  • paint deposits in the control valve can impair the freedom of movement of the armature 9.
  • the paint residues in the interior 12 of the coil tube 5 also prevent a color change, since the control valve cannot be flushed during operation.
  • the control valve cannot be flushed during operation.
  • Another possibility for a color change is to rinse the print head with an extremely high amount of detergent of several liters and over a longer period of several minutes, which also prevents a color change during operation due to the required amount of detergent and the necessary rinsing time.
  • the known print heads described above therefore do not allow a color change during operation.
  • the invention is therefore based on the object of creating a correspondingly improved print head and specifying a corresponding operating method.
  • the invention comprises the general technical teaching of technically designing the print head in such a way that a color change is made possible in the coating operation. This is achieved in that the printhead can be rinsed with a detergent when there is a color change in order to rinse coating agent residues from the printhead.
  • the print head according to the invention has a coating agent supply in order to supply the coating agent to be applied to the printing head.
  • the printhead according to the invention also has a separate detergent feed to supply a detergent. It should be mentioned here that the coating agent feed is separate from the flushing agent feed, so that the print head has separate inlets for feeding the coating agent on the one hand and for feeding the flushing agent on the other hand.
  • the print head according to the invention preferably also has a return in order to return the coating agent and / or rinsing agent, specifically either into a ring line or into a disposal facility.
  • the print head according to the invention thus preferably also has a further separate connection in order to return the coating agent or rinsing agent.
  • the return flow into the return is here preferably controlled by a controllable return valve, which can be designed as a return valve operated by its own medium or also as a proportional valve.
  • a controllable return valve which can be designed as a return valve operated by its own medium or also as a proportional valve.
  • the print head has a plurality of nozzles in order to deliver the coating agent.
  • a control valve is preferably assigned to each of the individual nozzles in order to control the release of the coating agent through the respective nozzle.
  • the flushing agent supply mentioned above then preferably has branch lines which lead to the individual control valves, so that all control valves of the print head can be flushed with the flushing agent at the same time.
  • the individual branch lines of the rinsing agent supply are preferably designed in such a way that the rinsing agent supplied is distributed evenly to the branch lines to the control valves, so that the individual control valves are rinsed with essentially the same amount of rinsing agent.
  • the print head has at least one nozzle for dispensing the coating agent and an associated control valve for controlling the coating agent discharge through the nozzle, as has already been briefly explained above.
  • the control valve has an electrical coil which is wound onto a coil tube and on the other hand can prevent the ability to change colors.
  • the flushing agent feed line therefore opens into the spool tube in order to flush the interior of the spool tube.
  • the coil tube - as in the case of the conventional control valve described at the outset - preferably has a circular internal cross-section.
  • the control valve has a coil core.
  • the coil core has a profile cross-section that does not completely fill the inner cross-section of the coil tube in order to leave space between the coil tube and the coil core for the detergent so that the detergent can flow through in the axial direction.
  • the coil core can have a star-shaped profile cross section with radially protruding ribs running in the axial direction, so that the flushing agent can flow in the axial direction between the ribs of the coil core.
  • the coil core has a flushing groove in its outer surface, which can run axially, in the circumferential direction or in a spiral shape, for example.
  • axially extending scavenging channels can also be arranged in the coil core.
  • Another example provides that the profile cross-section of the coil core is lattice-shaped and the detergent can flow through it.
  • the coil core is preferably sealed off from the coil tube with a seal, in particular with a compressive strength of more than 2 bar, 4 bar or 6 bar.
  • the print head can have several control valves, all of which can be flushed.
  • the individual control valves generally each have a coil tube, the flushing agent feed then opening into all of the coil tubes in order to be able to flush all of the coil tubes.
  • control valve has a displaceable armature which is displaced as a function of the energization of the coil and, as a function of its position, closes or releases the nozzle.
  • This armature preferably runs coaxially over part of its length in the coil tube and preferably has an axially permeable profile cross section so that flushing agent can flow between the armature and the inner wall of the coil tube.
  • the armature preferably has a non-circular profile cross-section which does not completely fill the circular inner cross-section of the coil tube and therefore allows an axial flow of flushing agent.
  • the profile cross-section of the anchor can be star-shaped or cross-shaped.
  • the flushing agent feed opens into the coil tube in the axial direction between the armature and the coil core.
  • the print head according to the invention preferably enables a quick color change within a color change duration of less than 1 hour, 20 minutes, 10 minutes, 30 seconds, 10 seconds or even less than 5 seconds.
  • the lowest possible color change losses are aimed for, which in the case of the print head according to the invention are preferably smaller than 5l, 2l, 200ml, 20ml, 10ml, 5ml or even smaller than 2ml.
  • the consumption of detergent preferably being less than 10l, 5l, 2l, 200ml, 100ml, 50ml, 20ml or even less than 10ml.
  • the print head has several separate rinsing agent feeds in order to supply different rinsing agents, which can be adapted, for example, to the respective coating agent.
  • the print head with its media-carrying parts is preferably constructed in such a way that the media-carrying parts are free of dead spaces and / or free of undercuts in order to improve flushability.
  • the print head being provided with a cleaning-promoting coating on its surfaces that come into contact with the coating agent, such a coating also being known as an "easy-to-clean coating".
  • the coating device according to the invention preferably also comprises a color changer, such as, for example, a linear color changer, a rotary color changer, a color changer integrated in the print head or an A / B color changer.
  • a color changer such as, for example, a linear color changer, a rotary color changer, a color changer integrated in the print head or an A / B color changer.
  • the invention also includes a corresponding operating method for such a print head, the individual process steps already result from the above description and therefore do not have to be described in more detail.
  • the detergent can be a universal detergent that is suitable for both water-based paints and solvent-based paints.
  • the detergent a VOC-free (VOC: volatile organic ompounds c) may be detergents.
  • the print head can be rinsed together with the rinsing agent or alternatively with pulsed air.
  • a solvent-based paint is first supplied and applied.
  • the printhead is then rinsed with a solvent-based rinsing agent in order to rinse off residues of the solvent-based paint.
  • a release agent can then also be added, for example alcohol.
  • a water-based varnish is added and applied.
  • the printhead is then rinsed with a water-based washing-up liquid to rinse off any residues of the water-based paint.
  • the print head is preferably pressed on with the new coating agent, i.e. filled.
  • a defined amount of lacquer is preferably also applied through the nozzle of the print head.
  • the rinsing agent can be discharged one after the other or alternately into the return or through the nozzle.
  • rinsing with a mixture of detergent and pulsed air.
  • FIG Figure 2 The schematic representation of a control valve according to the invention is now shown in FIG Figure 2 described, wherein the control valve is arranged in a print head.
  • This embodiment of a control valve according to the invention partially corresponds to the conventional control valve described at the beginning and shown in FIG. 1, see above that, in order to avoid repetition, reference is made to the above description, the same reference symbols being used for corresponding details.
  • a special feature of this exemplary embodiment is that the control valve has a flushing agent feed 13 which opens into the interior 12 of the coil tube 5. Rinsing agent can therefore be supplied via this rinsing agent feed 13 in order to rinse the control valve with a rinsing agent when there is a color change. This enables a color change during operation within a short period of time.
  • control valve in this exemplary embodiment has a special design of the seal 8 between the coil core 7 and the coil tube 5, the seal 8 enabling a pressure resistance of more than 2 bar.
  • FIG. 3 shows a schematic representation of a modification that is not part of the present invention, this modification partially coinciding with the embodiment described above, so that to avoid repetition, reference is made to the above description, the same reference numerals being used for corresponding details.
  • the displaceable armature 9 can freely flow around the washing agent, so that the washing agent can also flush the interior 12 of the coil tube 5.
  • the armature 9 has a cruciform profile cross-section with axially extending ribs, so that the flushing agent can flow between the ribs of the armature 9 in the axial direction into the interior 12 of the coil tube 5.
  • the detergent is not used here - as with Figure 2 - Supplied via the detergent supply 13, but Via the coating agent feed 4, which is therefore used alternately to feed the coating agent and to feed the rinsing agent.
  • the coil core 7 is sealed off from the interior space 12 by the seal 8.
  • FIG. 4 shows a further modification which does not form part of the present invention, this modification being the same as the modification described above, so that, in order to avoid repetition, reference is made to the above description, the same reference numerals being used for corresponding details.
  • a special feature of this modification is that the displaceable armature 9 is arranged in a flushable guide cage 14, which consists of a slotted cylinder so that the interior of the guide cage 14 can be flushed.
  • the seal 8 seals the interior of the coil tube 5 from the area carrying the media.
  • FIG. 5 shows yet another modification, so that reference is again made to the above description to avoid repetition, the same reference symbols being used for corresponding details.
  • the armature 9 has a guide bore 15 in the center, into which a guide pin 16 engages, the fit of the guide bore 15 and the guide pin 16 also being accessible for detergent.
  • seal 8 seals the annular gap between the coil tube 5 and the coil core 7.
  • a special feature of this modification which is not part of the present invention, is that the detergent feed 13 does not open into the interior 12 of the coil tube between the coil core 7 and the armature 9. Rather, the detergent feed 13 opens into the coil tube at the upper end of the coil tube 5.
  • FIG. 7 shows a further modification of a flushable control valve, this modification not being part of the present invention, and wherein the control valve provides a flexible membrane 17 for this purpose, which separates the control valve from the media-carrying parts in the coating agent supply 4.
  • the control valve itself does not have to be rinsed with detergent, since the control valve itself does not come into contact with the respective paint at all. Rather, only the membrane 17 on its coating agent side is touched by the respective paint, so that only this side of the membrane 17 has to be rinsed, which is easily possible by supplying rinsing agent via the coating agent feed.
  • Figure 8 shows a greatly simplified schematic representation of a coating device according to the invention with a coating agent feed 18, a color changer 19, a print head 20 according to the invention, a return valve 21 and a return 22.
  • the color changer 19 can supply different colored coating agents to the print head 20, wherein the print head 20 can optionally be rinsed with rinsing agent via a rinsing agent supply (not shown) or via the coating agent supply 18.
  • Residues of the coating agent and the rinsing agent produced during a rinsing process can then be discharged into the return line 22.
  • Figure 9 a schematic representation of a print head according to the invention with several control valves 23.1, 23.4, which are supplied with coating agent via a common coating agent feed 24 with several branch lines 25.
  • the coating device also has a common flushing agent feed 26, which is connected to the individual control valves 23.1-23.4 via a branch line 27, so that all control valves 23.1-23.4 of the print head can be flushed with flushing agent.

Landscapes

  • Coating Apparatus (AREA)
  • Cleaning In General (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)

Claims (17)

  1. Tête d'impression pour l'application d'un produit de revêtement sur un composant, plus particulièrement pour la peinture d'un composant de carrosserie de véhicule avec une peinture, avec
    a) au moins une buse (2) pour la distribution du produit de revêtement,
    b) une alimentation en produit de rinçage (13 ; 26) pour l'alimentation en produit de rinçage, dans laquelle la tête d'impression permet, en option, en fonctionnement de revêtement, un changement de couleur et peut être rincée lors d'un changement de couleur, afin d'éliminer les résidus de produit de revêtement de la tête d'impression,
    c) au moins une soupape de commande (23.1 - 23.4) pour le contrôle de la distribution d u produit de revêtement par l'au moins une buse (2), avec
    c1) une bobine électrique (6),
    c2) un tube de bobine (5) sur lequel la bobine (6) est enroulée à l'extérieur,
    c3) une armature coulissante (9), qui est coulissée en fonction de l'alimentation de la bobine (6) et qui obture ou libère la buse en fonction de sa position et
    c4) un noyau de bobine (7) à l'intérieur du tube de bobine (5),
    caractérisée en ce que
    d) l'alimentation en produit de rinçage (13 ; 26) débouche, dans la direction axiale, entre l'armature (9) et le noyau de bobine (7), dans le tube de bobine (5) afin d'introduire le produit de rinçage et de le guider vers l'intérieur du tube de bobine (5).
  2. Tête d'impression selon la revendication 1, caractérisée par a) une alimentation en produit de revêtement (4 ; 24) pour l'alimentation en produit de revêtement à appliquer et/ou pour l'alimentation en produit de rinçage et/ou b) l'alimentation en produit de rinçage (13; 26) qui est réalisée séparément pour l'alimentation en produit de rinçage.
  3. Tête d'impression selon la revendication 2, caractérisée par
    a) un retour (22) pour le retour du produit de revêtement et/ou du produit de rinçage et
    b) une soupape de retour (21) pour le contrôle du flux de retour vers le retour, plus particulièrement
    b1) sous la forme d'une soupape de retour actionnée par son propre fluide ou
    b2) sous la forme d'une soupape proportionnelle.
  4. Tête d'impression selon la revendication 2 ou 3,
    caractérisée en ce que
    a) la tête d'impression comprend plusieurs buses permettant de distribuer le produit de revêtement,
    b) la tête d'impression comprend plusieurs soupapes de commande (23.1 - 23.4) qui correspondent aux différentes buses (2) et qui contrôlent la distribution du produit de revêtement par les différentes buses (2),
    c) l'alimentation en produit de rinçage (26) comprend des embranchements (27) vers les différentes soupapes de commande (23.1 - 23.4), de façon à ce que toutes les soupapes de commande (23.1 - 23.4) soient rincées avec le produit de rinçage,
    d) les embranchements de l'alimentation en produit de rinçage (13 ; 26) sont, en option, conçue de façon à ce que le produit de rinçage introduit soit réparti uniformément entre les embranchements de façon à ce que les soupapes de commande soient rincées globalement avec la même quantité de produit de rinçage.
  5. Tête d'impression selon l'une des revendications précédentes,
    caractérisée en ce que
    a) le tube de bobine (5) présente, en option, une section transversale interne circulaire,
    b) le noyau de bobine (7) présente, en option, une section transversale profilée qui ne remplit pas entièrement la section transversale interne du tube de bobine (5), afin de laisser de la place entre le tube de bobine (5) et le noyau de bobine (7) pour le produit de rinçage,
    c) la section transversale profilée du noyau de bobine (7) présente la forme d'une étoile,
    d) la section transversale profilée du noyau de bobine (7) comprend, en option, dans sa surface d'enveloppe, au moins une rainure de rinçage, qui s'étend de préférence
    d1) axialement,
    d2) dans la direction circonférentielle ou
    d3) en spirale et/ou
    e) la section transversale profilée du noyau de bobine (7) comprend, en option, un canal de rinçage s'étendant axialement,
    f) la section transversale profilée du noyau de bobine (7) présente, en option, la forme d'une grille,
    g) le noyau de bobine (7) est étanchéifié par rapport au tube de bobine (5), en option, au moyen d'un joint d'étanchéité (8), plus particulièrement avec une résistance à la pression supérieure à 2 bar, 4 bar ou 6 bar.
  6. Tête d'impression selon la revendication 5,
    caractérisée en ce que
    a) la tête d'impression comprend plusieurs tubes de bobines (5) et
    b) des embranchements partent de l'alimentation en produit de rinçage (13 ; 26) vers tous les tubes de bobines (5) et/ou
    c) les tubes de bobines (5) peuvent être rincés ensemble et/ou
    d) les tubes de bobines (5) peuvent être rincés individuellement.
  7. Tête d'impression selon l'une des revendications précédentes,
    caractérisée en ce que
    a) l'armature (9) s'étend, sur une partie de sa longueur, de manière coaxiale dans le tube de bobine (5),
    b) l'armature (9) présente une section transversale profilée avec un passage axial afin de pouvoir guider le produit de rinçage entre l'armature (9) et la paroi interne du tube de bobine (5),
    c) l'armature (9) présente de préférence une section transversale profilée non circulaire, plus particulièrement une section transversale profilée en forme d'étoile ou cruciforme, afin de laisser de la place pour le produit de revêtement.
  8. Tête d'impression selon l'une des revendications précédentes,
    caractérisée en ce que
    a) l'armature coulissante (9) comprend un perçage de guidage central (15) et
    b) dans le perçage de guidage (15) de l'armature mobile (9), pénètre une tige de guidage fixe (16) et
    c) le perçage de guidage (15) dans l'armature coulissante (9) peut être rincé.
  9. Tête d'impression selon l'une des revendications précédentes,
    caractérisée en ce que
    a) la tête d'impression permet un changement de couleur dans une durée de changement de couleur inférieur à 1 h, 20 min, 10 min, 30 s, 10 s ou 5 s et/ou
    b) le changement de couleur ne dure pas plus longtemps que l'entrée respectivement la sortie de l'objet à revêtir de la zone de peinture et/ou
    c) le changement de couleur a lieu dans l'intervalle de temps déterminé par la distance entre deux objets à revêtir (carrosserie) et/ou
    d) la tête d'impression présente, lors d'un changement de couleur, de faibles pertes de changement de couleur, inférieures à 5 l, 2 l, 200 ml, 20 ml, 10 ml, 5 ml ou 2 ml et/ou
    e) la tête d'impression présente, lors d'un changement de couleur, une faible consommation de produit de rinçage, inférieure à 10 l, 5 l, 2 l, 200 ml, 100 ml, 50 ml, 20 ml, 10 ml et/ou
    f) la tête d'impression comprend plusieurs alimentations de produit de rinçage séparées (13 ; 26) afin d'introduire différents produits de rinçage et/ou
    g) la tête d'impression est globalement exempte de zone morte et/ou de contre-dépouille et/ou
    h) la tête d'impression est munie, au niveau de ses surfaces qui entrent en contact avec le produit de revêtement, d'un revêtement favorisant le nettoyage et/ou
    i) la tête d'impression est résistante à la pression jusqu'à une pression d'au moins 1 bar, 5 bar, 6 bar, 8 bar, 10 bar, 15 bar ou 20 bar.
  10. Dispositif de revêtement pour le revêtement de composants, plus particulièrement pour la peinture de composants de carrosserie de véhicules avec une peinture, caractérisé par une tête d'impression selon l'une des revendications précédentes, pour l'application du produit de revêtement sur le composant.
  11. Dispositif de revêtement selon la revendication 10, caractérisé par un changeur de couleur qui est disposé en amont de la tête d'impression et qui est relié, côté sortie, avec la tête d'impression, afin d'alimenter la tête d'impression au choix avec différents produits de revêtement, plus particulièrement avec une structure de type
    a) changeur de couleur linéaire,
    b) changeur de couleur rotatif,
    c) changeur de couleur intégré à l'intérieur de la tête d'impression ou
    d) changeur de couleur A/B.
  12. Procédé de fonctionnement pour une tête d'impression selon l'une des revendications 1 à 9, caractérisé par l'étape suivante :
    rinçage de la tête d'impression avec un produit de rinçage.
  13. Procédé de fonctionnement selon la revendication 12, caractérisé en ce que
    a) le produit de rinçage est un produit de rinçage universel qui est adapté aussi bien à une peinture à base d'eau qu'à une peinture à solvant et/ou
    b) le produit de rinçage est un produit de rinçage exempt de COV et/ou
    c) dans la tête d'impression est introduit, conjointement avec le produit de rinçage ou en variante, de l'air pulsé et/ou
    d) dans la tête d'impression est introduit, pour le rinçage, un aérosol et/ou
    e) dans la tête d'impression sont introduits successivement différents produits de rinçage.
  14. Procédé de fonctionnement selon la revendication 12 ou 13, caractérisé par les étapes suivantes :
    a) introduction d'une peinture à base de solvant et application de la peinture à base de solvant,
    b) rinçage de la tête d'impression avec un produit de rinçage à base de solvant,
    c) en option, introduction d'un produit de séparation lors du changement de la peinture à base de solvant à une peinture à base d'eau,
    d) introduction d'une peinture à base d'eau et application de la peinture à base d'eau et
    e) rinçage de la tête d'impression avec un produit de rinçage à base d'eau.
  15. Procédé de fonctionnement selon l'une des revendications 12 à 14, caractérisé par les étapes suivantes :
    a) pressurisation de la tête d'impression après un changement de couleur vers un nouveau produit de revêtement avec le nouveau produit de revêtement et/ou
    b) sortie d'une quantité de peinture définie après un changement de couleur par la buse de la tête d'impression.
  16. Procédé de fonctionnement selon l'une des revendications 12 à 15, caractérisé par les étapes suivantes :
    a) collecte de tous les fluides distribués lors d'un processus de rinçage pour une élimination de l'ancien produit de revêtement rincé ainsi que du produit de rinçage utilisé et/ou
    b) rinçage de la surface externe de la tête de buse lors d'un changement de couleur.
  17. Procédé de fonctionnement selon l'une des revendications 12 à 16, caractérisé en ce que
    a) lors d'un processus de rinçage, les étapes suivantes sont exécutées successivement ou en alternance :
    a1) rinçage de la tête d'impression avec un produit de rinçage vers le retour de la tête d'impression et
    a2) rinçage de la tête d'impression avec un produit de rinçage par la buse de la tête d'impression et
    a3) en option, rinçage de la tête d'impression avec un mélange de produit de rinçage et d'air pulsé,
    b) un changement de couleur comprend les étapes suivantes :
    b1) rinçage de la tête d'impression avec un produit de rinçage et
    b2) pressurisation de la tête d'impression avec un nouveau produit de revêtement.
EP20170976.3A 2016-12-14 2017-12-01 Tête d'impression et procédé opérationel correspondant Active EP3702045B1 (fr)

Applications Claiming Priority (3)

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DE102016014948.5A DE102016014948A1 (de) 2016-12-14 2016-12-14 Druckkopf und zugehöriges Betriebsverfahren
EP17811262.9A EP3535064B1 (fr) 2016-12-14 2017-12-01 Tête d'impression et procédé opérationel correspondant
PCT/EP2017/081152 WO2018108577A1 (fr) 2016-12-14 2017-12-01 Tête d'impression et procédé de fonctionnement associé

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CN111570162A (zh) * 2020-05-06 2020-08-25 广汽新能源汽车有限公司 上涂换色生产控制方法、装置及上涂换色生产线
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JP6979546B1 (ja) 2021-10-08 2021-12-15 アーベーベー・シュバイツ・アーゲーABB Schweiz AG 塗装装置
JP7241955B1 (ja) * 2022-12-20 2023-03-17 アーベーベー・シュバイツ・アーゲー 塗装機

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DE102016014948A1 (de) 2018-06-14
MX2019006965A (es) 2019-08-01
JP7001690B2 (ja) 2022-01-19
US11338312B2 (en) 2022-05-24
HUE051540T2 (hu) 2021-03-01
CN110072629A (zh) 2019-07-30
JP2020501881A (ja) 2020-01-23
WO2018108577A1 (fr) 2018-06-21
EP3535064A1 (fr) 2019-09-11
CN110072629B (zh) 2022-07-19

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