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EP2508267B1 - Buse de matériau de revêtement pouvant être retournée pour un pistolet pulvérisateur pour le revêtement d'une pièce usinée dotée d'un matériau de revêtement - Google Patents

Buse de matériau de revêtement pouvant être retournée pour un pistolet pulvérisateur pour le revêtement d'une pièce usinée dotée d'un matériau de revêtement Download PDF

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Publication number
EP2508267B1
EP2508267B1 EP11405240.0A EP11405240A EP2508267B1 EP 2508267 B1 EP2508267 B1 EP 2508267B1 EP 11405240 A EP11405240 A EP 11405240A EP 2508267 B1 EP2508267 B1 EP 2508267B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
coating material
spray gun
nipple
coating
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
EP11405240.0A
Other languages
German (de)
English (en)
Other versions
EP2508267A1 (fr
Inventor
Jürgen Ghesla
Rolf Mazenauer
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.)
J Wagner AG
Original Assignee
J Wagner 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 J Wagner AG filed Critical J Wagner AG
Priority to EP11405240.0A priority Critical patent/EP2508267B1/fr
Priority to PL11405240T priority patent/PL2508267T3/pl
Priority to ES11405240.0T priority patent/ES2498920T3/es
Priority to US14/009,355 priority patent/US9433953B2/en
Priority to PCT/CH2012/000078 priority patent/WO2012135966A1/fr
Priority to CN201280015272.8A priority patent/CN103459045B/zh
Publication of EP2508267A1 publication Critical patent/EP2508267A1/fr
Application granted granted Critical
Publication of EP2508267B1 publication Critical patent/EP2508267B1/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
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • 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
    • B05B15/52—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles
    • B05B15/531—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles using backflow
    • B05B15/534—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles using backflow by reversing the nozzle relative to the supply conduit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
    • 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
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
    • B05B1/042—Outlets having two planes of symmetry perpendicular to each other, one of them defining the plane of the jet
    • 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
    • B05B13/0405—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 with reciprocating or oscillating spray heads
    • B05B13/041—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 with reciprocating or oscillating spray heads with spray heads reciprocating along a straight line
    • 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
    • B05B13/0431—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 with spray heads moved by robots or articulated arms, e.g. for applying liquid or other fluent material to three-dimensional [3D] surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/01—Spray pistols, discharge devices

Definitions

  • the invention relates to a reversible coating material nozzle for a spray gun for coating a workpiece with coating material.
  • a spray gun When coating a workpiece with a coating material, such as a paint, a spray gun is often used which sprays the pressurized coating material through a coating material nozzle. In particular, if there are dirt particles in the coating material, it may happen that the coating material nozzle clogged. If the spray gun is still used, either no more coating material or only an insufficient amount can be sprayed. The coating material nozzle must then be cleaned. For this purpose, the trigger of the spray gun is locked, for example with a trigger lock, so that no coating material can escape from the spray gun. In an electrostatic spray gun is additionally ensured by the arrest of the trigger that no high voltage is applied to the high voltage electrode. Then the coating material nozzle can be removed.
  • a coating material such as a paint
  • the clogged coating material nozzle must manually, for example with solvent and a fine cleaning needle getting cleaned. Subsequently, the coating material nozzle must be reinstalled in the spray gun. After the trigger lock is released again, the spray gun is ready for use again. This process takes a long time. During manual cleaning, the coating material nozzle may be damaged and replaced with a new nozzle. In addition, it can happen that the clogged coating material nozzle can not be cleaned manually and then also has to be replaced.
  • An object of the invention is to provide a reversible coating material nozzle for a spray gun for coating workpieces with coating material which is designed so that it can both serve for coating a workpiece and is also self-cleaning if required.
  • a further object of the invention is to be able to remove the coating material nozzle, despite its small dimensions, without additional tools, ie only by hand, from the spray gun head and to be able to install it in the spray gun head.
  • the coating material nozzle is easily removable from the spray gun and automatically centered during installation itself.
  • the object is achieved by a reversible coating material nozzle for a spray gun for coating workpieces with coating material having the features specified in claim 1.
  • the inventive reversible coating material nozzle for a spray gun for coating a workpiece with coating material is designed so that it can be installed in a first and a second mounting position in a nozzle holder of the spray gun. It comprises a nozzle core with a nozzle core opening and a nozzle nipple with a nozzle nipple opening that is positively connected to the nozzle core.
  • a nozzle channel for the coating material is provided which extends through the nozzle nipple and the nozzle core and connects the nozzle nipple opening with the nozzle core opening.
  • the nozzle nipple has a cylindrical portion which forms a positive connection in the first mounting position with the nozzle holder of the spray gun.
  • an axial stop is provided. The ratio between the length from the stop to the cylindrical portion and the nozzle diameter is in the range between 0.75 and 2.00.
  • the ratio between the length and the nozzle diameter is in the range between 0.80 and 1.35.
  • the nozzle nipple has a cone which, in the first installation position, forms a positive connection with the nozzle receptacle of the spray gun.
  • the nozzle core also has a cone, which forms a positive connection in the second mounting position with the nozzle holder.
  • the nozzle nipple is made of plastic. This has the advantage that the nozzle nipple can be manufactured from a low-cost material and by injection molding.
  • the nozzle core is made of hard metal or ceramic. This extends the service life of the nozzle.
  • abrasive coating material can be sprayed.
  • the nozzle nipple has a further cylindrical section which forms a positive connection with the nozzle core. Tolerances in the production of this section do not play a special role. Even a possible material compression is uncritical or even conducive to the tightness.
  • a seal is provided between the nozzle core and the nozzle nipple.
  • a nozzle holder which holds together the nozzle core and the nozzle nipple.
  • the nozzle nipple may be made of hard metal or ceramic. This can further increase the service life of the coating material nozzle.
  • the nozzle holder is made of plastic.
  • Such a coating material nozzle can be inexpensively produced by injection molding.
  • connection between the nozzle holder and the nozzle nipple in the inventive coating material nozzle is proposed to form the connection between the nozzle holder and the nozzle nipple in the inventive coating material nozzle as a snap connection. This also facilitates the production.
  • the nozzle holder and the nozzle nipple can be connected to each other by gluing, welding or by a pressing operation.
  • the plastic can be designed to be electrically non-conductive.
  • a coating material nozzle can be used in an electrostatic spray gun.
  • the non-conductive plastic is achieved so that the electrical charge of the high-voltage electrode on the spray gun head does not reach the housing of the spray gun. It also ensures that there is no undue increase in capacity compared to the earth potential. A sudden discharge is prevented.
  • this also has the advantage that the smaller capacity of metal reduces the electrical capacitance of the coating nozzle. As a result, not so much electrical charge can be stored, the risk of sudden discharge is reduced.
  • a shoulder is provided which has a diameter of at least 5 mm and a maximum of 15 mm and forms an axial stop.
  • the nozzle nipple is an injection-molded part which partially encloses the nozzle core.
  • This embodiment is inexpensive and easy to produce.
  • the shoulder can be designed such that it forms a positive connection with an air cap of the spray gun in the installed state. If the air cap is rotated about its longitudinal axis, the coating material nozzle rotates. This is particularly advantageous when the nozzle core opening is slit-shaped. In this way, the flat jet generated by the coating material nozzle can be rotated and attached to the be adapted to the particular needs of the coating.
  • the lateral surface of the shoulder has a flat surface.
  • the flat surface of the shoulder is brought into registry with the flat surface of the air cap.
  • the spray gun according to the invention for coating a workpiece with coating material has a coating material nozzle which is designed as described above.
  • the nozzle receptacle has a bore for receiving the nozzle nipple.
  • the spray gun has a high voltage electrode.
  • the coating material nozzle according to the invention can be used in a spray gun for coating a workpiece with coating material.
  • a method for operating the spray gun described above for coating a workpiece with coating material is proposed in which the coating material nozzle is installed in the first installation position in the spray gun when the spray gun is to operate in the coating operation.
  • the coating material nozzle becomes installed in the second installation position in the spray gun.
  • FIG. 1 shows an embodiment of the inventive spray gun 1 with a first embodiment of the inventive reversible coating material nozzle 20 in side view.
  • the coating material nozzle 20 will hereinafter be referred to simply as a nozzle for the sake of simplicity.
  • the spray gun 1 comprises a gun housing 14, which is also referred to below as the housing of the spray gun.
  • a spray gun head 6 At the front end of the spray gun 1 is a spray gun head 6. A part of it is in FIG. 1 shown in section.
  • the spray gun head 6 is screwed with a union nut 7 on the gun housing 14.
  • Inside the spray gun head 6 is a coating material nozzle 20, which in the FIGS. 1, 2 and 3 is shown in a first mounting position.
  • the coating material nozzle 20 is held with the union nut 7 in the spray gun head 6.
  • the spray gun head 6 includes a nozzle guard 8, which is optional. It reduces the risk that the personnel will be immediately at the nozzle outlet 24 of the coating material nozzle 20 (see FIG. 3 ) comes into contact with the coating material. Contact with the coating material is to be avoided especially there, because the coating material there may cause injuries due to the high pressure, and when it comes into direct contact with the skin, can penetrate into the skin.
  • the nozzle guard 8 thus reduces the risk that the coating material can penetrate into the skin, and a possible damaging effect is minimized.
  • the nozzle guard 8 is also referred to below as contact protection and comprises a plurality of spacers 8.1 and 8.2. At the in FIG. 1 shown embodiment, the contact protection 8 four spacers, wherein due to the sectional view only two can be seen.
  • the contact protection can also be equipped with only two or three spacers. In addition, it is possible to provide five or more spacers.
  • the spray gun 1 further has a connection for compressed air 4.
  • the compressed air can be directed to the coating material jet as required by forming air channels 11 and 12, which are located in the downstream area in an air cap 10 of the spray head 8. With the help of compressed air, the shape of the coating material beam can be adjusted.
  • the spray gun 1 comprises an electrical connection 5, via which an electrode 15 on the spray gun head 6 can be supplied with high voltage.
  • the high voltage serves to ionize the coating material.
  • a spray gun designed in this way is also referred to below as an electrostatic gun.
  • the spray gun 1 also comprises a trigger guard 2.
  • a valve arranged in the spray gun 1 is opened via a valve rod, so that the coating material reaches the coating material nozzle 20 and is sprayed through it.
  • a trigger lock 16 of the trigger guard 2 can be locked. In the locked state, the trigger guard 2 can not be operated more so that no coating material can be sprayed.
  • FIG. 2 shows the spray head 6 of the spray gun 1 from FIG. 1 with the coating material nozzle 20 in a first installation position in an enlarged view partially in section.
  • FIG. 3 shows a section of the spray head 6 with the coating material nozzle 20 in the first installation position in an even more enlarged view. Is the coating material nozzle 20 in the first installation position, as in the FIGS. 1, 2 and 3 is shown, the spray gun 1 operates in the coating mode or coating mode. With the spray gun 1 now workpieces can be coated with coating material.
  • the cylindrical portion 22.4 of the nozzle nipple 22 is inserted in a nozzle holder 9, which has a correspondingly large bore 9.4.
  • the cylindrical portion 22.4 forms a positive connection together with the bore 9.4.
  • the pressurized coating material flows through the material channel 9.2, it presses the cylindrical portion 22.4 against the wall of the bore 9.4 and thus ensures an improved seal at the transition between the material channel 9.2 and the nozzle nipple 22.
  • the coating material nozzle 20 often removed and is used again, the sealing effect remains unchanged.
  • Slightly conical in this context means that the angle between the longitudinal axis and the cone is between 0 and 5 °. This means that the deviation from an exactly mathematical cylindrical shape should not exceed 5 °.
  • the nozzle nipple 22 also has a cone 22.1, which forms a further positive connection with a likewise inclined surface 9.1 of the nozzle holder 9.
  • the inclined surface 9.1 helps to introduce the nozzle nipple 22.4 in the bore 9.4 of the nozzle holder 9.
  • a nozzle core 23 At the downstream end of the coating material nozzle 20 is a nozzle core 23.
  • the coating material is when the trigger lever 2 is actuated through the hole 9.2 (which also serves as coating material channel) and the coating material channel 26 to the nozzle core opening 24 and sprayed there.
  • FIG. 4 shows the spray head 6 of the spray gun 1 from FIG. 1 with the coating material nozzle 20 in a second mounting position in an enlarged view partially in section.
  • the coating material nozzle 20 is rotated by 180 ° in the spray head 6 installed.
  • the cone 23.1 of the nozzle core 23 now forms together with the inclined surface 9.1 of the nozzle holder 9 a positive connection. If now the trigger 2 of the spray gun 1 is actuated, the coating material first flows through the nozzle core opening 24 of the coating material nozzle 20 and takes deposits with, the are in the region of the nozzle core opening 24. The deposits are pushed out of the spray gun 1 through the nozzle nipple opening 25.
  • the coating material nozzle 20 is cleaned and can be brought back into the first installation position.
  • the union nut 7 is unscrewed from the spray gun housing 14, the coating material nozzle 20 taken out, rotated by 180 ° and back in the nozzle holder 9 inserted.
  • the union nut 7 is screwed onto the spray gun housing 14 and the spray gun 1 is ready for use again to coat the next workpieces.
  • FIG. 5a shows the first embodiment of the coating material nozzle 20 in the side view and FIG. 5c shows this in plan view.
  • FIG. 5b shows the first embodiment of the coating material nozzle 20 in cross-section from the side and FIG. 5d in cross-section from above.
  • FIG. 5e shows the first embodiment of the coating material nozzle 20 in the front view.
  • the nozzle holder 21 is formed so that it holds the nozzle nipple 22 and the nozzle core 23 together.
  • the connection of the nozzle holder 21 with the nozzle nipple 22 may be formed as a snap connection 21.3, 22.3.
  • the nozzle holder 21 has for this purpose a resilient element or a snapper 21.3, which engages in a groove 22.3 of the nozzle nipple 22.
  • the nozzle holder 21 may be made of plastic. Such a coating material nozzle 20 can be inexpensively produced by injection molding.
  • the plastic from which the nozzle holder 21 and / or the nozzle nipple 22 are made is preferably an electrically non-conductive plastic.
  • the non-conductive plastic ensures that the electrical charge of the high-voltage-carrying electrode 15 on the spray gun head 6 does not reach the housing 14 of the spray gun 1. It also ensures that there is no undue increase in capacity compared to the earth potential comes. A sudden discharge is prevented.
  • a different electrically non-conductive material can be used. Such a coating material nozzle can be used in an electrostatic spray gun.
  • the plastic may also be electrically conductive, or metal may be used instead of the plastic.
  • Such a coating material nozzle can be used in a non-electrostatic spray gun. This coating material nozzle can also be used in an electrostatic spray gun when the spray gun is operated without electrostatics.
  • the nozzle holder 21 also includes a shoulder 21.5, which serves as an axial stop. It extends between paragraph 21.8 and paragraph 21.7.
  • the coating material nozzle 20 preferably has an outer diameter D of at least 5 mm and a maximum of 15 mm. In a preferred embodiment, the outer diameter D is 11 mm.
  • the shoulder 21.5 is positioned with respect to the cone 23.1 of the nozzle core 23 and the cone 22.1 of the nozzle nipple 22 in the axial direction so that the mass L1 and L2 are approximately equal.
  • the dimension L1 is defined as the distance between the shoulder 21.8 and the cone 23.1.
  • the dimension L2 is defined as the distance between the shoulder 21.7 and the cone 22.1.
  • the shoulder 21.7 forms an axial stop on the shoulder 21.5. If the union nut 7 is screwed onto the housing 14 of the spray gun, the union nut 7 presses the cone 22.1 of the coating material nozzle 20 onto the nozzle holder 9 via the axial stop 21.7.
  • the other shoulder 21.8 of the shoulder 21.5 forms an axial stop. If the union nut 7 is screwed onto the housing 14 of the spray gun, the union nut 7 presses the cone 23.1 of the nozzle core 23 onto the nozzle receptacle 9 via the axial stop 21.8.
  • the coating material channel 26 passes through the nozzle nipple 22 and the nozzle core 23 and connects the nozzle nipple opening 25 with the nozzle core opening 24.
  • a seal (not shown in the figures) may be provided between the nozzle core 22 and the nozzle nipple 23.
  • the seal may be formed as an axial seal, for example as an O-ring.
  • the seal can, as in the FIGS. 5b and 5d can be improved by the nozzle nipple 22 has a cylindrical portion 22.5 which projects into the nozzle core 23. As soon as the coating material flows through the nozzle channel 26, it pushes the section 22.5 against the channel wall 23.2 of the nozzle core 23 and thus ensures an improved seal at the channel transition between the nozzle nipple 22 and the nozzle core 23.
  • the coating material nozzle 20 has a length L in the range of 10.0 mm to 14.6 mm, and preferably 12.3 mm.
  • the nozzle diameter is preferably 11 mm.
  • the dimensions of the coating material nozzle 20 are relatively small, but you can still grab them by hand.
  • the coating material nozzle 20 can be optimally installed in the spray gun head 6. If the ratio L / D outside the range specified above, the coating material nozzle 20 can tilt both during removal and installation in the spray gun head 6, so that the installation or removal without additional tools if at all, then only with difficulty and relatively much Time and patience needed.
  • FIG. 6a shows a second embodiment of the coating material nozzle 30 in side view and FIG. 6c in the plan view.
  • FIG. 6b shows the second embodiment of the coating material nozzle 30 in cross-section from the side and FIG. 6d in cross-section from above.
  • FIG. 6e shows the second embodiment of the coating material nozzle 30 in the front view.
  • the second embodiment of the coating material nozzle 30 differs from the first embodiment essentially in that the nozzle nipple 32 is not only positively connected to the nozzle core 33, but also positively connected.
  • the nozzle nipple 32 is shaped and formed, that he also takes over the function of the nozzle holder 21.
  • the nozzle nipple 32 includes a shoulder 32.5, which serves as an axial stop. It is located approximately in the middle of the coating material nozzle 30 and extends from paragraph 32.8 to paragraph 32.7. In the region of the shoulder 32.5, the coating material nozzle 30 preferably has an outer diameter of at least 5 mm and a maximum of 15 mm.
  • the other shoulder 32.8 of the shoulder 32.5 forms an axial stop. If the union nut 7 is screwed onto the housing 14 of the spray gun, the union nut 7 presses on the axial stop 32.8 the cone 33.1 of the nozzle core 33 on the nozzle holder 9 (see also FIG. 4 ).
  • the coating material nozzle 30 has a length L in the range of 7.3 mm to 11.3 mm, and preferably of 9.3 mm.
  • the nozzle diameter D is preferably 9 mm.
  • the dimensions of the coating material nozzle 30 are relatively small, but they can still be reached by hand.
  • the coating material nozzle 20 can be optimally installed in the spray gun head 6. If the ratio L / D outside the range specified above, the coating material nozzle 30 - as already mentioned - tilt both during removal and installation in the spray gun head 6, so that the installation or removal without additional tools if anything, then only with difficulty is possible and requires a lot of time and patience.
  • the material from which the nozzle nipple 32 is made is preferably electrically non-conductive. It is thereby achieved that the electrical charge of the high-voltage-carrying electrode 15 on the spray gun head 6 does not reach the housing 14 of the spray gun 1. It also ensures that there is no undue increase in capacity compared to the earth potential. A sudden discharge is prevented.
  • the nozzle nipple 32 thus serves for the electrical insulation between the high-voltage-carrying components and the generally grounded components of the spray gun 1.
  • Such a coating material nozzle can be used in an electrostatic spray gun.
  • the nozzle nipple 32 may be an injection molded part that partially encloses the nozzle core 33. This embodiment is inexpensive and easy to produce.
  • the tightness between the nozzle nipple 32 and the nozzle core 33 can, as in the Figures 6b and 6d can be improved by the nozzle nipple 32 has a cylindrical portion 32.9 which projects into the nozzle core 33.
  • the coating material flows through the nozzle channel 26, it presses the section 32.9 against the channel wall 33.2 of the nozzle core 33 and thus ensures an improved seal at the channel transition between the nozzle nipple 32 and the nozzle core 33.
  • a seal in the FIGS. 6a to 6e not shown, may be provided between the nozzle nipple 32 and the nozzle core 33.
  • the seal may be formed as an axial seal, for example as an O-ring.
  • the cylindrical sections 22.4, 22.5, 32.4 and 32.9 of the nozzle nipples 22 and 32 additionally have the advantage that they are not susceptible to tolerances and material compression.
  • the nozzle cores 23 and 33 may be made of hard metal or ceramic. Thus, the life of the coating material nozzles 20 and 30 is extended. In addition, abrasive coating material can also be sprayed with such coating material nozzles without resulting in excessive wear.
  • the nozzle nipples 22 and 32 may also be made of cemented carbide or ceramic. Thus, the life of the coating material nozzles 20 and 30 can be further increased.
  • the angles ⁇ , ⁇ and ⁇ (see Figures 3 5d ) matched.
  • the angle ⁇ denotes the angle between the longitudinal axis 27 and the slope of the cone 9.1 (inner cone) of the nozzle holder 9.
  • the angle ⁇ denotes the angle between the longitudinal axis 27 and the slope of the cone 22.1 (outer cone).
  • the angle ⁇ finally denotes the angle between the longitudinal axis 27 and the slope of the cone 23.1 (outer cone). If all three angles ⁇ , ⁇ and ⁇ are approximately equal, the cones 22.1 and 9.1 or 23.1 and 9.1 can be used as a stop and / or as a seal. The same applies mutatis mutandis to the coating material nozzle 30th
  • the shoulder 21.5 or 32.5 can be formed in both the coating material nozzle 20 and the coating material nozzle 30 such that it forms a positive connection with the air cap 10 of the spray gun 1.
  • the coating material nozzle 20 or 30 rotates with it. This is particularly advantageous when the nozzle core opening 24 is slit-shaped.
  • the flat jet generated by the coating material nozzle 20 or 30 can be rotated and adapted to the particular needs of the coating.
  • This can be like in the FIGS. 5a-5e and 6a - 6e shown the outer surface of the shoulder 21.5 and 32.5 have a flat surface 21.6 and 32.6, respectively.
  • the flat surface is brought 21.6 or 32.6 of the shoulder with the flat surface of the air cap 10 to cover.
  • the spray gun 1 If the coating material nozzle 20 or 30 is installed in the first installation position in the spray gun, the spray gun 1 operates in the coating operation, so that workpieces can be coated. If, on the other hand, the coating material nozzle 20 or 30 of the spray gun 1 is to be cleaned, the coating material nozzle is installed in the spray gun 1 in the second installation position.
  • the two angles ⁇ and ⁇ of the cones 22.1 and 23.1 of the coating material nozzle 20 or the two angles ⁇ and ⁇ of the cones 32.1 and 33.1 of the coating material nozzle 30 are approximately equal.
  • the inventive coating material nozzle can also be used in a spray gun without compressed air support. In such a spray gun, the compressed air connection 4 is missing.
  • the inventive coating material nozzle can also be used in an automatic spray gun.
  • An automatic spray gun is understood to mean a spray gun which is not held by hand but is fastened or fixedly installed, for example, on a robot or a linear guide.

Landscapes

  • Nozzles (AREA)
  • Electrostatic Spraying Apparatus (AREA)

Claims (20)

  1. Buse réversible à matériau de revêtement pour un pistolet pulvérisateur, pour le revêtement d'une pièce usinée avec le matériau de revêtement,
    - laquelle peut être montée dans une admission de buse (9) du pistolet pulvérisateur (1) dans une première et une deuxième position de montage,
    - dans laquelle il est prévu un noyau de buse (23; 33) avec une ouverture de noyau de buse (24) et un téton de buse (22; 32) relié par complémentarité de forme au noyau de buse (23; 33), avec une ouverture de téton de buse (25),
    - dans laquelle il est prévu un canal de buse (26) pour le matériau de revêtement, lequel traverse le téton de buse (22; 32) et le noyau de buse (23; 33) et relie l'ouverture de téton de buse (25) à l'ouverture de noyau de buse (24),
    - dans laquelle le téton de buse (22; 32) comporte une section cylindrique (22.4; 32.4) présente une complémentarité de forme avec l'admission de buse (9) du pistolet pulvérisateur (1) dans la première position de montage,
    - dans laquelle il est prévu une butée axiale (21.7; 32.7),
    - dans laquelle le rapport entre la longueur (L) de la butée (21.7; 32.7) à la section cylindrique (22.4; 32.4) et le diamètre de buse (D) est compris entre 0,75 et 2,00.
  2. Buse à matériau de revêtement selon la revendication 1,
    dans laquelle le rapport entre la longueur (L) et le diamètre de buse (D) est compris entre 0,80 et 1,35.
  3. Buse de matériau de revêtement selon la revendication 1 ou 2,
    - dans laquelle le téton de buse (22; 32) comporte un cône (22.1; 32.1) présentant une complémentarité de forme avec l'admission de buse (9) du pistolet pulvérisateur (1) dans la première position de montage, et
    - dans laquelle le noyau de buse (23; 33) comporte un cône (23.1; 33.1) présentant une complémentarité de forme avec l'admission de buse (9) dans la deuxième position de montage.
  4. Buse à matériau de revêtement selon l'une des revendications précédentes,
    dans laquelle le téton de buse (22; 32) est en plastique.
  5. Buse à matériau de revêtement selon la revendication 1, 2 ou 3,
    dans laquelle le noyau de buse (23; 33) est en métal dur ou en céramique.
  6. Buse à matériau de revêtement selon l'une des revendications précédentes,
    dans laquelle le téton de buse (22; 32) comporte une deuxième section cylindrique (22.5; 32.9), laquelle s'introduit dans le noyau de buse (23; 33).
  7. Buse de matériau de revêtement selon l'une des revendications précédentes,
    dans laquelle il est prévu un joint d'étanchéité entre le noyau de buse (23; 33) et le téton de buse (22; 32).
  8. Buse à matériau de revêtement selon l'une des revendications précédentes,
    dans laquelle il est prévu une douille de buse (21) permettant de maintenir le noyau de buse (23) et le téton de buse (22) ensemble.
  9. Buse à matériau de revêtement selon la revendication 8,
    dans laquelle la douille de buse (21) est en plastique.
  10. Buse de matériau de revêtement selon la revendication 8 ou 9,
    dans laquelle la liaison entre la douille de buse (21) et le téton de buse (22) est conçue comme une liaison par encliquetage (21.3; 22.3).
  11. Buse à matériau de revêtement selon l'une des revendications 4 à 10,
    dans laquelle le plastique n'est pas électriquement conducteur.
  12. Buse à matériau de revêtement selon l'une des revendications 1 à 7,
    dans laquelle le téton de buse (32) est une pièce moulée par injection entourant partiellement le noyau de buse (33).
  13. Buse à matériau de revêtement selon l'une des revendications précédentes,
    dans laquelle il est prévu une épaule (21.5; 32.5) présentant un diamètre d'au moins 5 mm et de maximum 15 mm et formant une butée axiale (21.7; 32.7).
  14. Buse à matériau de revêtement selon la revendication 13,
    dans laquelle l'épaule (21.5; 32.5) est conçue de manière à présenter une complémentarité de forme avec un capuchon d'air (10) du pistolet pulvérisateur (1).
  15. Buse de matériau de revêtement selon l'une des revendications précédentes 12 ou 13,
    dans laquelle l'enveloppe extérieure de l'épaule (21.5; 32.5) comporte une surface plane (21.6; 32.6).
  16. Pistolet pulvérisateur pour le revêtement d'une pièce usinée avec un matériau de revêtement,
    dans lequel il est prévu une buse à matériau de revêtement (20; 30) selon l'une des revendications précédentes.
  17. Pistolet pulvérisateur selon la revendication 16, dans lequel l'admission de buse (9) comporte un perçage (9.4) pour l'admission du téton de buse (22; 32).
  18. Pistolet pulvérisateur selon la revendication 16 ou 17,
    dans lequel il est prévu une électrode à haute tension (15).
  19. Utilisation de la buse à matériau de revêtement selon l'une des revendications 16 à 18,
    dans un pistolet pulvérisateur (1) pour le revêtement d'une pièce usinée avec un matériau de revêtement.
  20. Procédé pour l'utilisation d'un pistolet pulvérisateur pour le revêtement d'une pièce usinée avec un matériau de revêtement selon l'une des revendications précédentes,
    - dans lequel la buse à matériau de revêtement (20; 30) est montée dans le pistolet pulvérisateur (1) dans la première position de montage, lorsque le pistolet pulvérisateur (1) est censé fonctionner en mode de revêtement, et
    - dans lequel la buse à matériau de revêtement (20; 30) est montée dans le pistolet pulvérisateur (1) dans la deuxième position de montage lorsque le pistolet pulvérisateur (1) est censé fonctionner en mode de nettoyage.
EP11405240.0A 2011-04-04 2011-04-04 Buse de matériau de revêtement pouvant être retournée pour un pistolet pulvérisateur pour le revêtement d'une pièce usinée dotée d'un matériau de revêtement Active EP2508267B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP11405240.0A EP2508267B1 (fr) 2011-04-04 2011-04-04 Buse de matériau de revêtement pouvant être retournée pour un pistolet pulvérisateur pour le revêtement d'une pièce usinée dotée d'un matériau de revêtement
PL11405240T PL2508267T3 (pl) 2011-04-04 2011-04-04 Odwracalna dysza do materiałów powłokowych do pistoletu natryskowego do powlekania obrabianego przedmiotu materiałem powłokowym
ES11405240.0T ES2498920T3 (es) 2011-04-04 2011-04-04 Boquilla pulverizadora de material de revestimiento reversible para una pistola pulverizadora, para recubrir una pieza de trabajo con un material de revestimiento
US14/009,355 US9433953B2 (en) 2011-04-04 2012-04-03 Reversible coating material nozzle for a spray gun for coating a workpiece with coating material
PCT/CH2012/000078 WO2012135966A1 (fr) 2011-04-04 2012-04-03 Buse à produit de revêtement réversible pour un pistolet de pulvérisation permettant d'appliquer un produit de revêtement sur une pièce
CN201280015272.8A CN103459045B (zh) 2011-04-04 2012-04-03 用于用涂层材料来涂覆工件的喷枪的可逆转的涂层材料喷嘴

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11405240.0A EP2508267B1 (fr) 2011-04-04 2011-04-04 Buse de matériau de revêtement pouvant être retournée pour un pistolet pulvérisateur pour le revêtement d'une pièce usinée dotée d'un matériau de revêtement

Publications (2)

Publication Number Publication Date
EP2508267A1 EP2508267A1 (fr) 2012-10-10
EP2508267B1 true EP2508267B1 (fr) 2014-06-11

Family

ID=44343833

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EP11405240.0A Active EP2508267B1 (fr) 2011-04-04 2011-04-04 Buse de matériau de revêtement pouvant être retournée pour un pistolet pulvérisateur pour le revêtement d'une pièce usinée dotée d'un matériau de revêtement

Country Status (6)

Country Link
US (1) US9433953B2 (fr)
EP (1) EP2508267B1 (fr)
CN (1) CN103459045B (fr)
ES (1) ES2498920T3 (fr)
PL (1) PL2508267T3 (fr)
WO (1) WO2012135966A1 (fr)

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WO2015039078A1 (fr) * 2013-09-16 2015-03-19 Graco Minnesota Inc. Buse de pulvérisation et procédé de fabrication
CN103611648B (zh) * 2013-11-03 2016-02-03 大连华工创新科技股份有限公司 喷嘴自动清洗装置
CA172971S (en) * 2016-08-19 2017-06-16 Sata Gmbh & Co Kg Spray gun
DE102019102239A1 (de) * 2018-01-30 2019-08-01 Ford Motor Company Wendedüse in ultraschallzerstäuber zur verstopfungsverhinderung
USD927645S1 (en) * 2018-10-31 2021-08-10 Carlisle Fluid Technologies (UK) Ltd Spray gun
USD877294S1 (en) * 2018-11-28 2020-03-03 Graco Minnesota Inc. Sprayer gun
USD875885S1 (en) * 2018-11-28 2020-02-18 Graco Minnesota Inc. Sprayer gun body
USD905822S1 (en) * 2018-12-04 2020-12-22 ROMER Sp. Cywilna Andrzej Ciura, Wojciech Ciura Spray gun
USD929539S1 (en) * 2019-05-31 2021-08-31 Graco Minnesota Inc. Electrostatic spray gun
USD934383S1 (en) 2019-05-31 2021-10-26 Graco Minnesota Inc. Electrostatic spray gun
US11772117B2 (en) 2019-12-31 2023-10-03 Graco Minnesota Inc. Spray gun for spraying paints and other coatings
USD937387S1 (en) 2019-12-31 2021-11-30 Graco Minnesota Inc. Compact spray gun
USD968569S1 (en) * 2020-08-19 2022-11-01 Ningbo Xianjia Electric Appliance Co., Ltd. Hand-held airbrush gun
USD1049312S1 (en) * 2021-07-06 2024-10-29 Wagner Spray Tech Corporation Spray gun
USD1046076S1 (en) * 2021-10-15 2024-10-08 Sata Gmbh & Co. Kg Spray gun
USD992684S1 (en) * 2021-12-01 2023-07-18 Exair Corporation Ion air nozzle housing
CN115415077A (zh) * 2022-09-19 2022-12-02 中山市君禾机电设备有限公司 一种喷涂机
USD1076004S1 (en) * 2022-11-23 2025-05-20 Zhejiang Luiswell Technology Co., Ltd Sprayer
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USD1025296S1 (en) * 2023-12-20 2024-04-30 Qiongzhu Ye Hand-held airbrush gun
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Also Published As

Publication number Publication date
EP2508267A1 (fr) 2012-10-10
CN103459045B (zh) 2017-05-17
US20140044881A1 (en) 2014-02-13
PL2508267T3 (pl) 2014-11-28
ES2498920T3 (es) 2014-09-26
CN103459045A (zh) 2013-12-18
US9433953B2 (en) 2016-09-06
WO2012135966A1 (fr) 2012-10-11

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