EP3554712A1 - Tête d'impression pour l'application d'un agent de revêtement - Google Patents

Tête d'impression pour l'application d'un agent de revêtement

Info

Publication number
EP3554712A1
EP3554712A1 EP17807873.9A EP17807873A EP3554712A1 EP 3554712 A1 EP3554712 A1 EP 3554712A1 EP 17807873 A EP17807873 A EP 17807873A EP 3554712 A1 EP3554712 A1 EP 3554712A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
valve element
seal
closed position
print head
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.)
Granted
Application number
EP17807873.9A
Other languages
German (de)
English (en)
Other versions
EP3554712B1 (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
Priority to EP20170281.8A priority Critical patent/EP3698880B1/fr
Publication of EP3554712A1 publication Critical patent/EP3554712A1/fr
Application granted granted Critical
Publication of EP3554712B1 publication Critical patent/EP3554712B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B05B1/3073—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 deflector acting as a valve in co-operation with the outlet orifice
    • 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
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • 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
    • 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
    • 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
    • B05B1/306—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 fluid
    • 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
    • B05B1/32—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 in which a valve member forms part of the outlet opening
    • 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
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1026—Valves
    • B05C11/1028—Lift valves
    • 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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
    • B05C5/0237—Fluid actuated valves
    • 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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
    • B05C5/0275—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve
    • 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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0291—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work the material being discharged on the work through discrete orifices as discrete droplets, beads or strips that coalesce on the work or are spread on the work so as to form a continuous coating
    • 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
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/05—Heads having a valve

Definitions

  • the invention relates to a print head for applying a coating composition to a component, in particular for appli ⁇ cation of a paint on a motor vehicle body component.
  • Rotationszerstäu ⁇ over are called application device commonly used, but have the disadvantage of a limited transfer efficiency, that is only part of the applied coating is deposited on the components to be coated, while the rest of the applied coating disposed of as so-called overspray must become.
  • a newer development line provides so-called print heads as an application device, such as for example
  • a plurality of nozzles are arranged in a nozzle plate of the print head in the rule, the individual nozzles depending Weil ⁇ can be released or closed by a movable valve element.
  • the movable valve element is usually a valve needle with an elastomeric insert as a seal.
  • the valve needle with the elastomer insert is hereby when displaceable between a closed position and an open position, wherein the elastomer insert seals the nozzle in the closed position of the valve needle, whereas the elastomer insert is lifted off the nozzle in the open position and thereby the fluid flow (in the prior art usually ink) through the nozzle through.
  • a disadvantage of this known type of sealing between the movable valve element (eg valve needle) and the nozzle is first the complex manufacturing process with the Ferti ⁇ supply of the elastomer insert.
  • valve needle can be miniaturized with the elastomer insert only within certain limits, so that with respect to the nozzle spacing between the adjacent nozzles, a lower limit can not be exceeded.
  • the invention is therefore based on the object to provide a different solution for sealing the movable valve member relative to the nozzle.
  • a printhead according to the invention according to the main claim.
  • atomizers eg rotary atomizer, disc atomizer, airless atomizer, air-mix atomizer, ultrasonic atomizer
  • the print head according to the invention emits a spatially narrow coating agent beam.
  • Such printheads are known per se from the prior art and, for example, in DE 10 2013 092 412 AI, US
  • the print head according to the invention is preferably used for the application of a paint (for example basecoat, clearcoat, water-based paint, solvent-based paint).
  • a paint for example basecoat, clearcoat, water-based paint, solvent-based paint.
  • the printhead according to the invention may alternatively be designed for the application of other coating agents, such as for example for the application of sealant, insulating material, adhesive, primer, etc., to name just a few examples.
  • the printhead according to the invention has, in accordance with the prior art, a nozzle plate containing at least one nozzle for dispensing the coating agent.
  • this nozzle is the aforementioned coating medium jet from the component to be coated. It is however basically also be ⁇ the possibility that the SI ⁇ se is disposed within the printhead and the Beschich ⁇ tung medium only to the outer discharge nozzle are further ⁇ , which then applies the coating agent to the component beam.
  • valve element to control the coating agent delivery through the nozzle.
  • This valve element is Beweg ⁇ Lich relative to the nozzle plate, wherein the valve member closes the nozzle in a closed Stel ⁇ lung, whereas the movable valve element releases the nozzle in an open position.
  • the movement of the valve element between the closed position and the open position is a pure linear movement (sliding movement), but in principle also the possibility of other movements of the valve element between the open position and the invention
  • the pressure head of the invention comprises a log ⁇ tung to seal the nozzle against the movable valve member in the closed position of the valve element.
  • this seal is preferably not formed as an elastomer insert on the valve element, since this is associated with the problems described above.
  • the seal can be arranged on the nozzle plate, ie not on the movable valve element, as is the case with the known elastomer inserts.
  • the invention shown SSE seal is mounted on the movable valve element, that is not on the nozzle plate.
  • a seal ⁇ is introduced, the two seals then cooperate.
  • the seal is preferably flat and, in the closed position, effects a surface contact between the movable valve element and the seal.
  • planar sealing plates or sealing layers can be applied to the inside of the nozzle plate for this purpose.
  • the movable valve element is adapted in its shape complementary to the shape of the nozzle and protrudes into the nozzle in the closed position.
  • the nozzle may conically narrow in the flow direction.
  • the movable valve element should then also taper conically towards its free end, preferably with the same cone angle as the nozzle, so that the valve element and the nozzle then form a corresponding shape fit, whereby the sealing effect is improved.
  • the nozzle has a semi-spherical inner contour ⁇ so that then preferably also the movable valve member has a hemispherical Au ⁇ chentur.
  • the seal can be applied to the inner edges of the nozzle. With a conically tapering inner contour of the nozzle, the seal then preferably covers the inner flanks of the nozzle.
  • the print head has a flexible sealing membrane, wherein the flexible sealing membrane forms the movable valve element and closes the nozzle in its closed position and releases it in its open position.
  • This sealing membrane is deflected by a valve drive between the closed position and the open position.
  • the flexible sealing membrane so a seal of the nozzle in the closed position.
  • the sealing membrane also separates the coating agent supply from the valve drive, so that the valve drive does not come into contact with the coating agent. This is especially beneficial ⁇ way when different colored coating materials nacheinan ⁇ the to be applied and the print head must therefore be flushed with a detergent.
  • the flexible sealing membrane ⁇ namely preventing coating agent deposits in the valve drive and allows due to its smooth upper surface ⁇ a good rinsing.
  • the sealing membrane can also be designed to be elastic and then fulfill the function of a restoring spring which presses the sealing membrane into its rest position, in particular into the closed position.
  • the valve drive then preferably deflects the sealing membrane into the open position, whereas the sealing membrane is pressed into the closed position due to its spring elasticity without activation by the valve drive. It is however ⁇ be within the scope of the invention, basically also the possibility that the sealing membrane is pressed due to its spring-elasticity ⁇ into the open position, wherein then the valve drive presses the sealing membrane in the closed position.
  • the print head preferably has a valve drive.
  • the valve drive including a flexible drive membrane which is mechanically coupled to the movable valve member and with a driving fluid (such as hydraulic fluid, compressed air) can be applied to deflect the actuator diaphragm and thereby move the valve element.
  • a driving fluid such as hydraulic fluid, compressed air
  • the driving liquid may consist of one part of the laser ckes, for example, binders, solvents, Mesamol TM or the like. If there is a rupture of the membrane, then that would be no chemical reactions or Unver discoursekei ⁇ th.
  • valve drive in combination with the above-mentioned flexible sealing membrane, since then two seals are present between the nozzle and the drive fluid, namely on the one hand the seal through the drive diaphragm and on the other hand, the seal through the flexible sealing membrane. In this way, leakage of the driving fluid (eg hydraulic fluid) through the nozzle can be prevented with double certainty.
  • driving fluid eg hydraulic fluid
  • valve drive can be designed as a magnetic actuator with a coil and a displaceable armature in the coil, wherein the armature is mechanically coupled to the movable valve element and is displaced ⁇ depending on the energization of the coil between the open position and the closed position.
  • the Ventilele ⁇ ment (eg plunger) is arranged stationary in the printhead, while the nozzle plate ⁇ is elastically flexible and can be bent by the valve Tilantriebs.
  • the valve drive In the closed position, the valve drive is then preferably does not exert any force on the SI ⁇ senplatte, so that the nozzle plate is flat and with the nozzle on the free end of the movable valve element (eg pestle) rests sealingly. Bends in the open position the valve drive, however, the nozzle plate, so that the nozzle is lifted at a certain stroke of the free end of the valve element, so that coating agent can escape from the nozzle.
  • the stroke of the nozzle plate in the region of the nozzle is preferably approximately 30 ⁇ m between the closed position and the open position.
  • the Dieh ⁇ tung may include a sealant layer, which is vulcanized, for example, on the nozzle plate, vapor-deposited, is applied by a film-forming method or printed.
  • the seal has a film which can be glued, laid on, bonded or laminated, for example, on the nozzle plate.
  • the movable element is preferably at least partially made of metal, plastic or silicon.
  • the print head according to the invention preferably has one of the following material pairings on the nozzle between the side of the valve element and the side of the nozzle:
  • the movable valve element may for example consist of metal and be combined with a valve tappet made of plastic.
  • the nozzle may consist of silicon or contain a nozzle insert made of silicon, while the movable valve element consists at least partially of steel, rubber or plastic (eg PTFE: polytetrafluoroethylene).
  • the seal usually also forms a mechanical stop, which limits the movement of the valve element in the closed position.
  • the seal therefore has two functions, namely the actual sealing function and the function of a mechanical stop.
  • a separate mechanical stop is Dage ⁇ gen provided to limit the movement of the valve element in the closed position. This can be advantageous because it acts a defined compression force on the seal.
  • the mechanical stop in this case preferably has a Ma ⁇ terialplanung between the side of the valve element and the side of the nozzle, which provides on both sides of metal.
  • the seal is preferably elastic and experiences in the closed position a certain material compression, which is defined by the mechanical stop.
  • the movable valve element is preferably formed as Ventilplat- te, which can be moved by the valve drive via a plunger between the open position and the closed position.
  • the plunger protrudes through the nozzle and the valve plate rests in the closed position on the underside of the nozzle plate facing away from the valve drive. The valve plate is thus drawn into the nozzle for closing the nozzle, whereas the nozzle plate is pushed out of the nozzle to open the nozzle.
  • nozzle plate runs in the nozzle plate, a nozzle channel from which at least one nozzle is fed.
  • the plate-shaped valve element is in this case
  • the printhead preferably emits a narrowly defined coating agent jet as opposed to a spray as emitted by conventional atomizers (e.g., rotary atomizers).
  • conventional atomizers e.g., rotary atomizers
  • the printhead can emit a droplet jet in contrast to a coating agent beam which is contiguous in the beam longitudinal direction.
  • the print head it is also possible for the print head to emit a coating agent jet which is contiguous in the beam longitudinal direction, in contrast to a droplet jet.
  • the entire printhead or to individual components of the pressure ⁇ head may apply (for example, on the nozzle plate 1) high voltage (30-90kV) to utilize the additional advantages of the electrostatic painting, such as higher transfer efficiency and / or electrostatic wrap around edges (the charged paint moves along the electrical Field lines, whereby surfaces away from the applicator are also coated in the vicinity of edges).
  • the printhead When using electrostatic charging, it may be necessary to use a potential separation system in the material supply when processing conductive paints. In this case, too, all components of the applicator ⁇ sector must be designed high voltage resistant.
  • Particularly advantageous in the printhead according to the invention is the fact that it works almost overspray-free, ie, the printhead preferably has an order efficiency of at least 80%, 90%, 95% or 99%, so that substantially all of the applied coating agent completely on the Part is deposited without overspray.
  • the print head preferably has a large area coating performance, so that the print head is also suitable for surface coating in the series coating of motor vehicle body components.
  • the print head therefore preferably has a professionnbeschich ⁇ processing power of at least 0.5 m 2 / min, lm 2 / min, 2m 2 / min or even 3m 2 / min. It should also be mentioned that the invention not only
  • a printing head according to the invention is used as the application device.
  • the print head according to the invention can be performed by a multi-axis paint robot, which preferably has a serial kinematic with at least six movable Ro ⁇ boterachsen.
  • FIG. 1 shows a schematic representation of an out ⁇ section of a printhead according to the invention with a flat seal
  • Figure 2 shows a modification of Figure 1 with a shape adaptation of nozzle and valve element
  • FIG. 3 shows a modification of FIGS. 1 and 2 with a flexible membrane as a seal
  • FIG. 4 shows a further modification with an additional drive diaphragm which is hydraulically driven
  • FIG. 5 shows a further modification with a plunger which is displaceable and moves a valve plate in a nozzle channel
  • FIG. 6 shows a modification of FIG. 5, wherein the valve plate can rest sealingly on the outside of the print head
  • Figures 7A and 7B show a modification with a flexible nozzle plate which can be bent to open and close the nozzle
  • Figures 8A-8C show various possible contours of the nozzle in a printhead according to the invention.
  • FIG. 1 shows a schematic representation of a control valve in an inventive
  • Printhead for paint application in a paint shop for painting motor vehicle body components wherein the print head is moved by a multi-axis painting robot with a serial robot kinematics with at least six robot axes, as it is known from the prior art and therefore need not be described in detail.
  • the printhead according to the invention has a nozzle plate 1 with a plurality of nozzles 2, wherein only a single nozzle 2 is shown here for the sake of simplicity.
  • the paint to be painted is supplied in this case by a paint feed 3 in the print head, wherein the paint feed 3 is limited in the drawing below through the nozzle plate 1 and above by a further plate 4.
  • the upper plate 4 has coaxially with the nozzle 2 in the nozzle ⁇ plate 1 an opening on which a coil tube 5 is placed coaxially, wherein the coil tube 5 is wound with a coil 6.
  • armature 9 which is displaceable in the direction of the double arrow, wherein the movement of the armature 9 depends on the energization of the coil 6.
  • the drawing shows the armature 9 in this case in a lower closed position to seal the nozzle 2.
  • the coil 6 is energized so that the An ⁇ ker 9 is pulled in the drawing up to release the nozzle 2.
  • control valve has a return spring 10, which presses the armature 9 without energizing the coil 6 in the closed position shown in the drawing.
  • the armature 9 At its free end, the armature 9 carries a seal 11 to seal the nozzle 2 in the closed position.
  • the seal 11 on the armature 9 cooperates in the closed position together with a flat seal 12 on the inside of the nozzle plate 1.
  • the flat seal 12 on the inside of the nozzle plate can for example consist of a layer of sealant vulcanized on the inside of the nozzle plate 1, vapor-deposited, applied by a layer-forming process or printed on ⁇ .
  • the seal 12 is a film which is placed on the nozzle plate 1 inside, stuck on ⁇ or laminated.
  • material pairings of the seal 11 on the one hand and the seal 12 on the other there are many opportunities for the material pairings of the seal 11 on the one hand and the seal 12 on the other.
  • a material pairing example ⁇ metal on metal, plastic on metal, metal on plastic, plastic on silicon, silicon on silicon or metal on silicon in question.
  • FIG. 2 shows a modification of the exemplary embodiment according to FIG. 1, so that reference is made to the above description to avoid repetition, the same reference numbers being used for corresponding details.
  • a special feature of this embodiment is that the nozzle 2 tapers conically in the inlet region in the flow direction and has lateral nozzle flanks. The seal 12 is therefore applied to the lateral nozzle edges of the nozzle 2.
  • the seal 11 is fitted arrival to this shape of the nozzle and therefore tapers towards its free end tapered such that the gasket 11 on one hand and the nozzle 2 on the other hand adapted in shape, resulting in a good beat ⁇ tung effective.
  • FIG. 3 shows a further modification of the exemplary embodiments described above, so that reference is again made to the above description to avoid repetition.
  • a special feature of this embodiment is ei ⁇ ner flexible sealing membrane 13 instead of the seal 11.
  • the drawing shows the opening position in which the armature 9 is lifted up and the sealing membrane 13 releases the nozzle. To close the nozzle 2, however, the coil 6 is de-energized, so that the armature 9 is pressed by the return spring 10 in the drawing down until the sealing membrane 13 rests on the inner mouth opening of the nozzle 2 in the nozzle plate 1 and thereby the nozzle 2 closes.
  • the sealing membrane 13 not only has the function of releasing or closing the nozzle 2. Rather, the sealing membrane 13 also causes a seal between the paint supply 3 and the other components of the control valve, such as the armature 9, the coil ⁇ tube 5 and the coil core 7. This is advantageous because it varnish deposits in the control valve and in particular in the coil tube 5 are prevented. This is particularly important in a color change, because thereby the control valve itself does not need to be rinsed, because it does not come into contact with the paint ⁇ at all.
  • FIG. 4 shows a modification of the exemplary embodiment according to FIG. 3, so that reference is made to the above description in order to avoid repetition.
  • valve drive which does not - as in Figure 3 - electromagnetically, but hydraulically.
  • the valve drive has a separate drive ⁇ membrane 14, which acted on a hydraulic connection 15 with ei ⁇ ner hydraulic fluid as the drive fluid ⁇ who can to the drive diaphragm 14 and thus also the sealing tion membrane 13 with the attached seal 11 in the direction of the double arrow to move.
  • FIG. 5 shows a modification of the exemplary embodiment according to FIG. 1, so that reference is made to the above description in order to avoid repetition.
  • a special feature of this embodiment is initially that WUR dispense with the return spring 10 ⁇ de, that is, the movement of the armature 9 is both in the
  • the armature 9 is connected via a plunger 16 with a valve plate 17 which is ver ⁇ pushed in a nozzle channel 18 in the direction of the double arrow.
  • the drawing shows the position of the valve plate 17 in the closed position, in which the valve plate 17 rests against the top of the nozzle channel 18 and thereby seals the nozzle 2.
  • FIG. 6 shows a modification of the exemplary embodiment according to FIG. 5, so that reference is made to the above description in order to avoid repetition.
  • a special feature of this embodiment is that in the nozzle plate 1 no nozzle channel 18 is arranged. Rather, the valve plate 17 is in the closed position shown in the drawing on the outside of the nozzle plate 1 in a recess sealingly.
  • Figures 7A and 7B show another concept for opening and closing the nozzle 2.
  • Figure 7A shows a
  • Figure 7B shows an open position in which the nozzle 2 is released.
  • the nozzle 2 is in this case either sealed or released by a fixed plunger 19.
  • the SI ⁇ senplatte 1 is either not bent (Figure 7A) or bent ( Figure 7B), that the nozzle plate 1 is lifted in the region of the nozzle 2 of the fixed plunger 19th
  • Figures 8A-8C show different possible contours of the nozzle 2 and that a cylindrical contour (Fig. 8A), a ko ⁇ African contour (Fig. 8B), and a contour with an elevation 20 on the exit side of the nozzle 2 (Fig. 8C ).
  • the invention is not limited to the preferred embodiments described above. Rather, a variety of variants and modifications is possible, which also make use of the inventive idea and therefore fall within the scope.
  • the invention also claims protection for the subject matter and the features of Dependent claims independent of the respective claims taken in each case and in particular without the features of the main ⁇ claim.
  • the invention includes various aspects OF INVENTION ⁇ dung enjoying independently protection.

Landscapes

  • Coating Apparatus (AREA)
  • Spray Control Apparatus (AREA)
  • Nozzles (AREA)

Abstract

L'invention concerne une tête d'impression pour l'application d'un agent de revêtement sur un élément, en particulier pour l'application d'une peinture sur un élément de carrosserie de véhicule automobile, comprenant une plaque à buses (1), une buse (2) située dans la plaque à buses (1) servant à la distribution de l'agent de revêtement, et un élément soupape (9, 11) mobile par rapport à la plaque à buses (1) servant à commander la distribution de l'agent de revêtement à travers la buse (2), l'élément soupape mobile (9, 11) fermant la buse (2) dans une position de fermeture, tandis qu'il ouvre la buse (2) dans une position d'ouverture, ladite tête d'impression comprenant également un joint d'étanchéité (11, 12) destiné à rendre étanche la buse (2) par rapport à l'élément soupape mobile (9, 11) dans la position de fermeture de ce dernier (9, 11). Selon l'invention, le joint d'étanchéité (11, 12) ne se présente pas sous la forme d'un insert en élastomère sur l'élément soupape (9, 11).
EP17807873.9A 2016-12-14 2017-12-01 Tete d'impression pour appliquer un produit de revêtement Active EP3554712B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20170281.8A EP3698880B1 (fr) 2016-12-14 2017-12-01 Tête d'impression pour appliquer un moyen de revêtement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016014947.7A DE102016014947A1 (de) 2016-12-14 2016-12-14 Druckkopf zur Applikation eines Beschichtungsmittels
PCT/EP2017/081141 WO2018108576A1 (fr) 2016-12-14 2017-12-01 Tête d'impression pour l'application d'un agent de revêtement

Related Child Applications (2)

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EP20170281.8A Division-Into EP3698880B1 (fr) 2016-12-14 2017-12-01 Tête d'impression pour appliquer un moyen de revêtement
EP20170281.8A Division EP3698880B1 (fr) 2016-12-14 2017-12-01 Tête d'impression pour appliquer un moyen de revêtement

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EP3554712A1 true EP3554712A1 (fr) 2019-10-23
EP3554712B1 EP3554712B1 (fr) 2020-07-08

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EP (2) EP3554712B1 (fr)
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KR (2) KR20190095256A (fr)
CN (1) CN110072626B (fr)
DE (1) DE102016014947A1 (fr)
ES (1) ES2812302T3 (fr)
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CN110072626B (zh) 2022-05-31
KR20230028578A (ko) 2023-02-28
US20190336990A1 (en) 2019-11-07
US11167297B2 (en) 2021-11-09
EP3698880A1 (fr) 2020-08-26
CN110072626A (zh) 2019-07-30
DE102016014947A1 (de) 2018-06-14
KR102686001B1 (ko) 2024-07-19
JP6983886B2 (ja) 2021-12-17
EP3698880B1 (fr) 2022-05-04
JP2020501877A (ja) 2020-01-23
ES2812302T3 (es) 2021-03-16

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