EP3554712B1 - Druckkopf zur applikation eines beschichtungsmittels - Google Patents
Druckkopf zur applikation eines beschichtungsmittels Download PDFInfo
- Publication number
- EP3554712B1 EP3554712B1 EP17807873.9A EP17807873A EP3554712B1 EP 3554712 B1 EP3554712 B1 EP 3554712B1 EP 17807873 A EP17807873 A EP 17807873A EP 3554712 B1 EP3554712 B1 EP 3554712B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- valve element
- print head
- seal
- closed position
- 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
Links
- 239000011248 coating agent Substances 0.000 title claims description 33
- 238000000576 coating method Methods 0.000 title claims description 13
- 239000000463 material Substances 0.000 title claims description 13
- 238000007639 printing Methods 0.000 title description 2
- 239000002184 metal Substances 0.000 claims description 22
- 229910052710 silicon Inorganic materials 0.000 claims description 22
- 239000010703 silicon Substances 0.000 claims description 18
- 239000003973 paint Substances 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 17
- 239000004033 plastic Substances 0.000 claims description 15
- 229920003023 plastic Polymers 0.000 claims description 15
- 229920001971 elastomer Polymers 0.000 claims description 11
- 238000010422 painting Methods 0.000 claims description 11
- 239000000806 elastomer Substances 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 5
- 239000000565 sealant Substances 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims description 2
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 2
- 239000011888 foil Substances 0.000 claims 1
- 239000005060 rubber Substances 0.000 claims 1
- 210000004379 membrane Anatomy 0.000 description 17
- 239000012528 membrane Substances 0.000 description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 15
- 238000012986 modification Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000004922 lacquer Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000007786 electrostatic charging Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000013615 primer Substances 0.000 description 1
- 239000002987 primer (paints) Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 239000004924 water-based lacquer Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- 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 agent to a component, in particular for applying a lacquer to a motor vehicle body component.
- Rotary atomizers are usually used as the application device for the serial painting of motor vehicle body components, but these have the disadvantage of a limited application efficiency, i.e. only a 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.
- printheads as application devices, 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 of the paint to be applied, but rather a spatially narrowly delimited jet of paint which is almost completely deposited on the component to be painted, so that almost no overspray occurs.
- nozzles are generally arranged in a nozzle plate of the print head, the individual nozzles being able to be released or closed in each case by a movable valve element.
- the movable valve element is usually a valve needle with an elastomer insert as a seal.
- the valve needle with the elastomer insert is here slidable between a closed position and an open position, the elastomer insert sealing 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 releases the fluid flow (mostly ink according to the prior art) through the nozzle.
- a disadvantage of this known type of seal between the movable valve element (e.g. valve needle) and the nozzle is first of all the complex manufacturing process in the manufacture of the elastomer insert.
- valve needle can only be miniaturized with the elastomer insert within certain limits, so that a lower limit cannot be exceeded with regard to the nozzle spacings between the adjacent nozzles.
- the general technical background of the invention also includes DE 10 2009 029 946 A1 , DE 38 04 092 A1 , EP 3 272 669 A1 , EP 2 644 392 A2 and GHASEM G NASR et al .: "Chapter 2. Background on Sprays and Their Production ".
- the invention is therefore based on the object of providing another solution for sealing the movable valve element from the nozzle.
- the term “printhead” used in the context of the invention is to be understood generally and is only used to delimit atomizers (for example rotary atomizers, disc atomizers, airless atomizers, air mix atomizers, ultrasonic atomizers), which spray the spraying agent to be applied submit.
- the print head according to the invention emits a spatially narrowly limited coating agent jet.
- Such printheads are known per se from the prior art and for example in DE 10 2013 092 412 A1 , US 9,108,424 B2 and DE 10 2010 019 612 A1 described.
- the printing head according to the invention is preferably used to apply a lacquer (e.g. basecoat, clearcoat, water-based lacquer, solvent-based lacquer).
- a lacquer e.g. basecoat, clearcoat, water-based lacquer, solvent-based lacquer
- the print head according to the invention can alternatively also be designed for the application of other coating agents, such as for example the application of sealant, insulating material, adhesive, primer, etc., to name just a few examples.
- the print head according to the invention has a nozzle plate which contains at least one nozzle for dispensing the coating agent.
- This nozzle preferably emits the abovementioned coating agent jet onto the component to be coated.
- the nozzle is arranged inside the printhead and only passes the coating agent on to the outer outlet nozzle, which then applies the coating agent jet to the component.
- the print head according to the invention has a plate-shaped valve element which can be displaced by a valve drive in order to control the dispensing of the coating agent through the nozzle.
- This valve element is movable relative to the nozzle plate, the valve element closing the nozzle in a closed position, 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 preferably a purely linear movement (displacement movement), but within the scope of the invention there is in principle also the possibility of other movements of the valve element between the open position and the closed position.
- a rotary movement, a pivoting movement or a combined rotary and linear movement of the valve element can be mentioned merely by way of example.
- valve element lies in the closed position on the underside of the nozzle plate facing away from the valve drive.
- the print head according to the invention can comprise a seal for sealing the nozzle with respect to the movable valve element in the closed position of the valve element.
- this seal is preferably not designed as an elastomer insert on the valve element, since this is associated with the problems described at the outset.
- 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 seal according to the invention is attached to the movable valve element, ie not to the nozzle plate.
- a seal being attached both to the movable valve element and to the nozzle plate, in this case the nozzle, the two seals then interacting.
- the seal is preferably flat and in the closed position brings about a flat contact between the movable valve element and the seal.
- flat sealing plates or sealing layers can be applied to the inside of the nozzle plate for this purpose.
- the pressure head has a valve drive for moving the movable valve drive.
- the valve drive comprises a flexible drive membrane, which is mechanically coupled to the movable valve element and can be acted upon by a drive fluid (for example hydraulic fluid, compressed air) in order to deflect the drive membrane and thereby move the valve element.
- a drive fluid for example hydraulic fluid, compressed air
- the valve drive can be designed as a magnetic actuator with a coil and a displaceable armature in the coil, the armature being mechanically coupled to the movable valve element and being displaced between the open position and the closed position depending on the energization of the coil.
- the seal can be flat.
- the seal can have a sealant layer that is vulcanized onto the nozzle plate, vapor-deposited, applied by a layer-forming method or printed on, for example.
- the seal has a film that can be glued, placed, bonded or laminated onto the nozzle plate, for example.
- the movable element preferably consists at least partially of metal, plastic or silicon.
- the movable valve element can, for example, consist of metal and can be combined with a valve tappet made of plastic.
- the nozzle can be made of silicon or contain a nozzle insert made of silicon, while the movable valve element is at least partially made of steel or plastic (e.g. PTFE: polytetrafluoroethylene).
- PTFE polytetrafluoroethylene
- the seal When the movable valve element moves from the open position into the closed position, the seal generally also forms a mechanical stop which limits the movement of the valve element into the closed position.
- the seal has two functions, namely the actual sealing function and the function of a mechanical stop.
- a separate mechanical stop is provided in order to limit the movement of the valve element into the closed position. This can be advantageous because a defined compression force acts on the seal.
- the mechanical stop preferably has a material pairing between the side of the valve element and the side of the nozzle which provides metal on both sides.
- the seal is preferably elastic and experiences a certain material compression in the closed position, which is defined by the mechanical stop.
- the movable valve element is designed as a valve plate, which can be moved by the valve drive, preferably via a tappet, between the open position and the closed position.
- the plunger protrudes through the nozzle and, according to the invention, the valve plate lies in the closed position on the underside of the nozzle plate facing away from the valve drive.
- the valve plate is thus pulled into the nozzle to close the nozzle, whereas the nozzle plate is pressed out of the nozzle to open the nozzle.
- the print head preferably emits a narrowly limited jet of coating agent, in contrast to a spray mist, as is 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 jet connected in the longitudinal direction of the jet.
- the printhead emits a coating agent jet which is connected in the longitudinal direction of the jet, in contrast to a droplet jet.
- a particular advantage of the printhead according to the invention is the fact that it works almost without overspray, i.e. the print head preferably has an application efficiency of at least 80%, 90%, 95% or 99%, so that essentially all of the applied coating agent is completely deposited on the component without overspray being produced.
- the print head preferably has a large surface coating capacity, so that the print head is also suitable for surface coating in the series coating of motor vehicle body components. Therefore, the print head preferably has a surface coating performance of at least 0.5 m 2 / min, 1m 2 / min, 2m 2 / min or even 3m 2 / min.
- the invention not only claims protection for the printhead according to the invention described above as a single component. Rather, the invention also claims protection for a complete coating system (for example painting system) for painting components (for example motor vehicle body components), a print head according to the invention being used as the application device.
- a complete coating system for example painting system
- painting components for example motor vehicle body components
- the print head according to the invention can be guided by a multi-axis painting robot, which preferably has serial kinematics with at least six movable robot axes.
- FIG. 1 shows a schematic representation of a control valve in a print head for coating application in a painting system for painting motor vehicle body components, the print head being moved by a multi-axis painting robot with serial robot kinematics with at least six robot axes, as is known per se from the prior art is and therefore need not be described in more detail.
- the print head has a nozzle plate 1 with a plurality of nozzles 2, only one nozzle 2 being shown here for simplicity.
- the paint to be painted is fed from a paint feeder 3 in the print head, the paint feeder 3 being delimited in the drawing below by the nozzle plate 1 and above by a further plate 4.
- the upper plate 4 has an opening coaxial with the nozzle 2 in the nozzle plate 1, on which a coil tube 5 is placed coaxially, the coil tube 5 being wound with a coil 6.
- the coil tube 5 there is a coil core 7, which is sealed at the upper end of the coil tube 5 by a seal 8 with respect to the coil tube 5.
- the drawing shows the armature 9 in a lower closed position in order to seal the nozzle 2.
- the coil 6 is energized so that the armature 9 is pulled up in the drawing in order to release the nozzle 2.
- control valve has a return spring 10 which presses the armature 9 into the closed position shown in the drawing without energizing the coil 6.
- the armature 9 At its free end, the armature 9 carries a seal 11 in order 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 consist, for example, of a layer of sealant which is vulcanized onto the inside of the nozzle plate 1, vapor-deposited, applied by a layer-forming method or printed on.
- the seal 12 is a film that is placed on the inside of the nozzle plate 1, glued or laminated on.
- seal 11 on the one hand and the seal 12 on the other there are various possibilities for the material combinations of the seal 11 on the one hand and the seal 12 on the other.
- metal on metal, plastic on metal, metal on plastic, plastic on silicon, silicon on silicon or metal on silicon can be used as material pairing.
- FIG. 2 shows a modification of the variant according to Figure 1 , so that to avoid repetition reference is made to the above description, the same reference numerals being used for corresponding details.
- a special feature of this variant is that the nozzle 2 tapers conically in the inlet area in the direction of flow and has lateral nozzle flanks.
- the seal 12 is therefore applied to the side flanks of the nozzle 2.
- the seal 11 is adapted to this shape of the nozzle and therefore tapers conically towards its free end, so that the seal 11 on the one hand and the nozzle 2 on the other are adapted in shape, which leads to a good sealing effect.
- FIG. 3 shows a further modification of the variants described above, so that to avoid repetition reference is made to the above description.
- a special feature of this variant consists in a flexible sealing membrane 13 instead of the seal 11.
- the drawing shows the open position in which the armature 9 is raised and the sealing membrane 13 releases the nozzle.
- the coil 6 is de-energized, so that the armature 9 is pressed downward by the return spring 10 in the drawing until the sealing membrane 13 rests on the internal 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 effects 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 prevents paint deposits in the control valve and in particular in the coil tube 5 become. This is particularly important when changing colors because the control valve itself does not have to be rinsed because it does not come into contact with the paint at all.
- Figure 4 shows a modification of the variant according to Figure 3 , so that reference is made to the above description in order to avoid repetitions.
- valve drive which is not - as with Figure 3 - works electromagnetically, but hydraulically.
- the valve drive has a separate drive membrane 14, which can be acted upon by a hydraulic fluid 15 as a drive fluid, around the drive membrane 14 and thus also the sealing membrane 13 with the attached seal 11 in the direction of the double arrow.
- Figure 5 shows a modification of the variant according to Figure 1 , so that reference is made to the above description in order to avoid repetitions.
- a special feature of this variant is that the return spring 10 has been dispensed with, i.e. the movement of the armature 9 is controlled both in the closed position and in the open position solely by energizing the coil 6.
- the armature 9 is connected via a plunger 16 to a valve plate 17 which can be displaced in the nozzle arrow 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 on the top of the nozzle channel 18 and thereby seals the nozzle 2.
- the plunger 16 with the valve plate 17, on the other hand, is pressed downward in the drawing and is then no longer in contact with the upper wall of the nozzle channel 18.
- the paint can then enter the nozzle channel 18 from the paint supply and flow out through the nozzle 2.
- Figure 6 shows a modification of the variant according to Figure 5 , so that reference is made to the above description in order to avoid repetitions.
- a special feature of this exemplary embodiment is that no nozzle channel 18 is arranged in the nozzle plate 1. Rather, the valve plate 17 lies in the closed position shown in the drawing on the outside of the nozzle plate 1 in a recess sealing.
- Figures 7A and 7B show another concept for opening or closing the nozzle 2.
- Figure 7A a closed position
- Figure 7B shows an open position in which the nozzle 2 is released.
- the nozzle 2 is either sealed or released by a fixed plunger 19.
- the nozzle plate 1 is either not bent ( Figure 7A ) or so bent ( Figure 7B ) that the nozzle plate 1 is lifted off the fixed plunger 19 in the region of the nozzle 2. It is sufficient here if the nozzle plate 1 executes a bending-related stroke of, for example, 30 pm in the region of the nozzle 2.
- FIGs 8A-8C show different possible contours of the nozzle 2, namely a cylindrical contour ( Figure 8A ), a conical contour ( Figure 8B ) and a contour with an elevation 20 on the outlet side of the nozzle 2 ( Figure 8C ).
Landscapes
- Coating Apparatus (AREA)
- Nozzles (AREA)
- Spray Control Apparatus (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20170281.8A EP3698880B1 (de) | 2016-12-14 | 2017-12-01 | Druckkopf zur applikation eines beschichtungsmittels |
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 (de) | 2016-12-14 | 2017-12-01 | Druckkopf zur applikation eines beschichtungsmittels |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20170281.8A Division EP3698880B1 (de) | 2016-12-14 | 2017-12-01 | Druckkopf zur applikation eines beschichtungsmittels |
EP20170281.8A Division-Into EP3698880B1 (de) | 2016-12-14 | 2017-12-01 | Druckkopf zur applikation eines beschichtungsmittels |
Publications (2)
Publication Number | Publication Date |
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EP3554712A1 EP3554712A1 (de) | 2019-10-23 |
EP3554712B1 true EP3554712B1 (de) | 2020-07-08 |
Family
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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EP20170281.8A Active EP3698880B1 (de) | 2016-12-14 | 2017-12-01 | Druckkopf zur applikation eines beschichtungsmittels |
EP17807873.9A Active EP3554712B1 (de) | 2016-12-14 | 2017-12-01 | Druckkopf zur applikation eines beschichtungsmittels |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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EP20170281.8A Active EP3698880B1 (de) | 2016-12-14 | 2017-12-01 | Druckkopf zur applikation eines beschichtungsmittels |
Country Status (9)
Country | Link |
---|---|
US (1) | US11167297B2 (ko) |
EP (2) | EP3698880B1 (ko) |
JP (1) | JP6983886B2 (ko) |
KR (2) | KR20190095256A (ko) |
CN (1) | CN110072626B (ko) |
DE (1) | DE102016014947A1 (ko) |
ES (1) | ES2812302T3 (ko) |
MX (1) | MX2019006975A (ko) |
WO (1) | WO2018108576A1 (ko) |
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EP3698880B1 (de) | 2022-05-04 |
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CN110072626A (zh) | 2019-07-30 |
JP6983886B2 (ja) | 2021-12-17 |
US20190336990A1 (en) | 2019-11-07 |
JP2020501877A (ja) | 2020-01-23 |
EP3554712A1 (de) | 2019-10-23 |
CN110072626B (zh) | 2022-05-31 |
US11167297B2 (en) | 2021-11-09 |
EP3698880A1 (de) | 2020-08-26 |
KR20230028578A (ko) | 2023-02-28 |
WO2018108576A1 (de) | 2018-06-21 |
KR20190095256A (ko) | 2019-08-14 |
ES2812302T3 (es) | 2021-03-16 |
DE102016014947A1 (de) | 2018-06-14 |
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