Classifications

• • 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
• • 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 objects being vehicle components, e.g. vehicle bodies

Definitions

• the present invention relates to the technical field of motor vehicles, in particular the technical field related to the spraying of structural adhesive on body parts.
• a well-known solution consists in reducing the weight of motor vehicles, for example by reducing the thicknesses of the parts or sheets making up the body of the motor vehicle.
• a structural bonding process consisting in depositing a layer of so-called structural adhesive on the surface of thin parts. After drying, the structural adhesive thus forms a solid layer reinforcing the rigidity of the part.
• the difficulty of adding a process such as welding to hold the parts together lies in the fact that it is forbidden to weld through the structural adhesive.
• the structural adhesive is burnt which then emits noxious fumes that are difficult to treat.
• robotic arms provided with spraying means of structural glue in the form of a jet.
• the robotic arms make it possible to deposit the structural adhesive in liquid jet form, very precisely, on predetermined areas on the surface of a part. In this way, areas of the part can be preserved from a deposit of structural adhesive, in order to subsequently allow the production of a weld point, without the risk of damaging or burning the structural layer.
• the present invention aims to provide a solution making it possible to reduce the rate of accumulation of structural glue residues on the surface of a nozzle projecting said glue in the form of a jet.
• the invention provides a structural glue spray nozzle, comprising a nozzle body through which a structural glue supply duct, the supply duct opening out to the surface of the nozzle at the level of an outlet orifice.
• the invention is remarkable in that the outer surface of the nozzle body is at least partially covered by a protective layer, composed of acetone, propane, butane and butanone.
• the inventors have found that the protective layer significantly limits the rate of accumulation of structural adhesive residues on the surface of the spray nozzle.
• composition of the protective layer comprises in mass ratio, between 25% and 50% acetone, between 25% and 50% propane, between 25% and 50% butane and between 2.5% and 10% butanone;
• the protective layer is partially liquid at room temperature.
• the protective layer to a thickness between 0.1 mm and 1 mm;
• the protective layer surrounds the outlet opening of the spray nozzle.
• the invention also relates to a method of depositing a protective layer on a spray nozzle, implementing the deposition, on the outer surface of a nozzle body, of a protective layer comprising of acetone, propane, butane and butanone, on the outer face of the spray nozzle.
• composition of the protective layer comprises in mass ratio, between 25% and 50% acetone, between 25% and 50% propane, between 25% and 50% butane and between 2.5% and 10% butanone;
• the protective layer is deposited around an outlet of the spray nozzle
• a new protective layer is deposited on the spray nozzle, after a period of time equal to or greater than 7 hours;
• FIG. 1 shows a schematic longitudinal section of a spray nozzle according to the invention.
• the invention provides a solution for reducing the rate of accumulation of structural glue residues on the surface of a nozzle projecting said glue in the form of a jet.
• FIG. 1 shows a schematic view of a spray nozzle 2 according to the invention.
• the spray nozzle comprises a nozzle body 4, crossed right through by a supply duct 6 of structural adhesive.
• the supply duct 6 opens onto the surface of the spray nozzle at an outlet port 8.
• the spray nozzle 2 is made from a metallic material.
• the invention proposes to at least partially cover the outer surface with a protective layer 12.
• the protective layer 12 is configured to limit, over time, the accumulation of structural adhesive on the nozzle, sprayed by said nozzle.
• the protective layer is remarkable in that it comprises in mass ratio, between 25% and 50% acetone, between 25% and 50% propane, between 25% and 50% butane and between 2.5% and 10% butanone.
• the protective layer can be made from one of the following products, known in particular under the trade name “Ceramic anti-scratch spray”, marketed under the references:
• the protective layer 12 is preferably partially liquid at room temperature.
• ambient temperature is meant a temperature between 18 ° C and 22 ° C.
• the thickness of the protective layer is between 0.1 mm and 1 mm, preferably between 0.1 mm and 0.5 mm.
• the protective layer is preferably applied at the level of the outlet orifice 8, all around said orifice.
• the invention also relates to a method of depositing the protective layer on a spray nozzle described above, implementing a step of spraying the protective layer 12 on the outer surface 10 of the spray nozzle. 2.
• the protective layer 12 on a spray nozzle advantageously makes it possible to reduce the amount of structural adhesive residues accumulating over time.
• the protective layer allows a more precise use over time of the spray nozzle 2, to produce precise deposits of structural adhesive layer on parts or sheets making up the body of the motor vehicle.
• the spray nozzle can operate for longer between two cleaning cycles of said nozzle, consisting in removing the structural glue residues, capable of deflecting the jets of glue coming from its outlet orifice.

Landscapes

• Application Of Or Painting With Fluid Materials (AREA)
• Adhesives Or Adhesive Processes (AREA)
• Coating Apparatus (AREA)
• Spray Control Apparatus (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=74045439

Family Applications (1)

Country Status (4)

Family Cites Families (11)

• 2020
  • 2020-04-14 FR FR2003701A patent/FR3109104B1/fr active Active
• 2021
  • 2021-03-11 CN CN202180028653.9A patent/CN115397567A/zh active Pending
  • 2021-03-11 EP EP21717143.8A patent/EP4135908A1/de not_active Withdrawn
  • 2021-03-11 WO PCT/FR2021/050417 patent/WO2021209696A1/fr not_active Ceased

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