EP1230985A1 - Masking method, masking gasket and production method thereof - Google Patents

Masking method, masking gasket and production method thereof Download PDF

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Publication number
EP1230985A1
EP1230985A1 EP02290211A EP02290211A EP1230985A1 EP 1230985 A1 EP1230985 A1 EP 1230985A1 EP 02290211 A EP02290211 A EP 02290211A EP 02290211 A EP02290211 A EP 02290211A EP 1230985 A1 EP1230985 A1 EP 1230985A1
Authority
EP
European Patent Office
Prior art keywords
adhesive
masking
joint
seal
wing
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.)
Withdrawn
Application number
EP02290211A
Other languages
German (de)
French (fr)
Inventor
Jean-Louis Gouret
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.)
Saint Gobain Abrasifs Technologie et Services SAS
Original Assignee
Saint Gobain Abrasifs Technologie et Services SAS
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 Saint Gobain Abrasifs Technologie et Services SAS filed Critical Saint Gobain Abrasifs Technologie et Services SAS
Publication of EP1230985A1 publication Critical patent/EP1230985A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
    • B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
    • B05B12/26—Masking elements, i.e. elements defining uncoated areas on an object to be coated for masking cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
    • B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
    • B05B12/26—Masking elements, i.e. elements defining uncoated areas on an object to be coated for masking cavities
    • B05B12/265—Masking elements, i.e. elements defining uncoated areas on an object to be coated for masking cavities between a door and a post, e.g. foam strips
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249982—With component specified as adhesive or bonding agent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249982—With component specified as adhesive or bonding agent
    • Y10T428/249983—As outermost component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249982—With component specified as adhesive or bonding agent
    • Y10T428/249985—Composition of adhesive or bonding component specified
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer

Definitions

  • the invention relates to the field of masking. We hear by masking a step in a method of treating a surface where at least part of the surface to be treated is covered, generally so temporary, so as to preserve said surface of said treatment.
  • the invention relates to a masking method, as well as a method of painting of at least part of a motor vehicle, and also relates to a masking adhesive seal adapted to said methods of masking and paint, and a method of manufacturing said seal.
  • Masking methods are commonly used in all types of industry, for example in those where a process requires a step of painting, especially in car repair.
  • EP-B-0 365 510 describes a masking method which comprises the use of a bead of cellular material, elongated, compressible, flexible, which is resistant to surface treatment, to mask at least part of a surface to be treated. Said bead of cellular material is applied so detachable on the part of the surface to be treated and is detached after completing the treatment. Said bead of cellular material constitutes an adhesive seal of masking. This seal is placed on the surface to be treated by hand or using a tool to distribute the seal.
  • the adhesive seal of masking described in this document is of substantially cylindrical geometry or parallelepipedic and that it is placed on the surface to be treated using a pressure applied to the outside face of the seal, opposite to the adhesive face which is brought into contact with the surface to be treated.
  • EP-B-0 384 626 describes foam articles formed from cold weldable foam which can be used as adhesive seals for masking. As before, the geometry of these joints is substantially cylindrical and their application is made by pressing on the part outside of the seal, opposite the part coated with an adhesive.
  • masking tape Another problem with the masking tape mentioned above relates to the fact that the geometry of such a type of joint does not allow adapt it to all the parts that you want to protect in a vehicle.
  • masking adhesive seals are used in particular to protect a space located between a mobile part and a fixed part of a vehicle.
  • fixed part the body parts forming the structure of the vehicle, in particular the body, the wings, the uprights, the roof, and by parts moving parts liable to move relative to the fixed parts, including doors, hood, tailgate.
  • the distance between the different fixed parts and the different parts mobile differs very significantly from one part of the same vehicle to another.
  • the aim of the present invention is to remedy the above drawbacks, in particular by allowing easier fitting of the adhesive seal of masking, and in the alternative using a seal capable of adapting a large variation in spacing between fixed parts and mobile parts, in particular for the whole of the same vehicle, or even for any vehicle.
  • the problem of the easy installation of an adhesive masking joint is solved by a method of masking at least one edge of part of a surface to be treated consisting in using an adhesive masking seal comprising a elongated cellular material resistant to surface treatment and at least one adhesive zone, and which comprises at least one groove of which at least part of the wall has an inclined area at an angle of less than 45 ° relative to the adhesive area.
  • the application of said seal can be carried out by guiding said seal by the insertion of at least part of at least one operator's finger into the throat.
  • Said masking adhesive seal is applied in a detachable manner to at least one part of the edge of the surface to be treated and is detached after completing the treatment.
  • the particular shape of the joint makes it very easy to guide it during that it is applied to part of the surface to be treated.
  • a finger in particular a substantial part of at least one finger
  • Finger inserted into the throat is used to press the throat area inclined at less than 45 ° by report to the adhesive area to fix the joint on the surface to be treated and simultaneously guiding the joint, moving the finger in the groove so that follow the desired route to the joint.
  • the masking adhesive seal includes a groove as defined considerably facilitates the positioning of the seal the along a path with a small radius of curvature or with an acute angle.
  • the application of the seal is carried out by guiding continuously said joint using the finger (s) of an operator, inserted in throat and finger (s) simultaneously move (s) longitudinal in the groove and apply (s) sufficient pressure on part of the surface of the groove to allow adhesion of at least one adhesive zone of the masking adhesive seal on at least part of the edge of the surface to be treated.
  • the invention also relates to a method of painting at least one part of a motor vehicle which comprises a masking step defined above.
  • the masking adhesive seal is applied to part of the vehicle then compressed by another part of said vehicle.
  • the masking adhesive seal is applied to a fixed part of the vehicle, in particular of the vehicle body and the other part which compresses said seal is on a movable part, in particular a opening the vehicle, for example a door, and / or a tailgate, and / or a hood.
  • fixed part of the vehicle is meant a part which cannot move when the vehicle is stationary, for example the body of the vehicle.
  • Mobile part of the vehicle means a part, which when the vehicle is stationary, can be moved relative to the fixed parts of the vehicle, by example by dismantling or for example by actuating the means which allow the opening of an opening, such as doors, hoods, tailgates.
  • the adhesive seal of masking is applied to a part of the vehicle, in particular to a fixed part, and the sides of at least one groove are separated by a second part of the vehicle, in particular a mobile part.
  • the seal moves aside and comes to be pressed on the second part next to the first.
  • This variant is particularly advantageous for protecting an area located in particular between a hood and bodywork, on the side of the bodywork where a windscreen is flush.
  • the same masking joint can be used to mask a space between the bodywork and an opening leaf of the vehicle, whatever the opening of the vehicle.
  • the product stock required for the masking step is reduced because only one type of masking adhesive seal is suitable for all parts to hide from a vehicle.
  • the invention also relates to the masking adhesive seal intended to be used for the implementation of the masking method or the painting described above.
  • This masking adhesive joint comprises an elongated cellular material, resistant to surface treatment and at least one adhesive area susceptible to be detached after having finished the surface treatment and at least one groove, at least part of the wall of which has an inclined area of less 45 ° to the adhesive area, into which at least one can be inserted part of a finger, especially a thumb.
  • the size of the groove is such that part of a sufficient phalanx to guide the masking adhesive seal while applying this the latter in an adhesive manner on a surface to be treated.
  • the masking adhesive seal is present under the form of a very elongated strip, in particular several meters in length.
  • the section of this strip is generally uniform over its entire length. Slight variations in dimensions may exist, especially in cases where strips, of length less than the length of the final strip, have been butted.
  • the shape of the section of the uncompressed joint fits easily in a parallelepiped, and preferably in a half ellipse, itself inscribed in said parallelepiped.
  • the masking adhesive joint comprises a single groove guide and two wings located on either side of this groove, with on at at least one of the wings, at least one adhesive zone located on the outside, that is to say on the side of the wing opposite the throat.
  • guide groove is meant a groove where one is susceptible to insert a part, in particular a substantial part, of a finger.
  • groove designates such a guide groove.
  • the inner part of the wing mentioned above has an area inclined at an angle of less than 45 °, preferably less than 30 °, relative to the outer part of this wing, on which said adhesive zone is located.
  • This angle inclination is also advantageously non-zero, that is to say it is understood between 0 and 45 ° and preferably between 0 and 30 °.
  • the section of the masking adhesive joint fits into a parallelepiped from 5 to 40 mm on a side, in particular from 10 to 25 mm side and from 3 to 40 mm in height, in particular from 10 to 25 mm in height, at the uncompressed state of the seal, and is likely to be compressed at least from the half in one dimension (especially in height).
  • This variant is particularly suitable for preparation by masking of motor vehicles. Joint heights, uncompressed, from 10 to 25 mm, especially around 20 mm allow to use such a seal to mask all the spaces between fixed parts and opening parts of an automobile.
  • the term “height” of the joint means the dimension of the joint section of the side in which the groove is cut. In general the height is appreciably perpendicular to at least one adhesive zone, this adhesive zone being that on which a finger inserted in the joint presses during the installation operation of the seal.
  • the groove of the masking adhesive seal is a V-shaped throat with a rounded throat bottom.
  • the side of the seal opposite to the throat is preferably rounded.
  • the inner part of the wing located between the throat and an adhesive area, and the inner part of the wing located on the other side of the groove preferably has an angle, ⁇ + ⁇ , of between 20 and 80 °, in particular more than 40 °, and preferably less than 70 °, when the joint is not compressed.
  • the bottom of the groove has a radius curvature, R, between 5 and 30 mm, preferably more than 8 mm and especially less than 20 mm, when the joint is not compressed.
  • the adhesive zone, of the wing which is located between the groove and said adhesive area has a flat surface and the angle, ⁇ , of this surface with the interior part of this same wing is less than the angle, ⁇ , made by the inner wall of the opposite wing, located on the other side of the groove with the same flat surface of the adhesive area, when the joint is not compressed.
  • This arrangement greatly facilitates the use of the seal for masking. It facilitates on the one hand the insertion of the finger for guiding and makes it possible to press easily to make it stick on the surface to be protected. On the other hand we have thus a great ability to accommodate large areas to hide different.
  • This configuration is very suitable for both the spaces to be hidden between a fixed part and a mobile part where one wishes to proceed to a masking by crushing the joint (advantageously by bringing the sides of the throat), and the spaces between such parts where one wishes to masking by spacing the sides of the groove of the joint.
  • This configuration also has the advantage, in the case where one comes to overwrite the seal, to facilitate the sliding of the wing opposite to the wing on which the adhesive area.
  • ⁇ is greater than ⁇ by 3 ° to 30 °, preferably by more than 5 ° and especially less than 15 °.
  • the wing located on the side of the groove opposite the wing on which is located at least one adhesive zone projects beyond the wing on which is located at least one adhesive zone.
  • the wing on which is located at minus an adhesive zone, includes an edge located on the side of the wing opposite the back of the throat to block the movement of the wing when compresses the joint.
  • the thickness of the edge, e is in particular between 1 and 10 mm, preferably 2 to 5 mm, when the joint is not compressed.
  • the positioning of the adhesive zone is located more on the side of the joint where the groove was cut only on the other side.
  • the masking adhesive seal includes a single adhesive zone located on the part exterior of a wing, said adhesive zone is asymmetrically arranged on the outer part of this wing, and mainly on the outer part of this wing close to the outer edge of this wing. She is particularly willing substantially on two thirds of the surface of the outer part of the wing in starting from the outer edge of this wing.
  • this configuration avoids apply adhesive in areas close to the outer edge of the joint, on the side opposite the throat.
  • This configuration is particularly advantageous because in these areas the joint takes the form of an arc which will gently tangent the two surfaces that hold the joint.
  • the paint distribution is very satisfactory because this avoids obtaining a marked line of paint that would highlight the area where you have repainted, while hiding areas where you do not want the paint penetrates. This gives a slight mist of paint in this area which leads to a transition zone which is no longer detectable when operations of painting are completed.
  • the elongated cellular material used for the joint masking adhesive according to the invention is a polyurethane foam.
  • polyester-based foam for a use with paints based on organic solvent, and foam based polyether for water-based paints.
  • RECTICEL polyester foams are suitable for these applications, in particular the foams referenced S357 and SF367D. These foams have cell sizes in the range of 500 to 1000 ⁇ m.
  • Polyurethane foams make it possible to resist so satisfactory to a surface treatment, in particular to painting and withstand the corresponding heat treatment without damage.
  • Setting painting usually leads to bringing the parts to be treated to around 70 ° C. for about 30 minutes. At the end of this treatment and after cooling the seal can be easily removed.
  • a polyurethane foam seal according to the invention has the advantage of being easily cut by hand with little deformation, and elongate very little when applied to a part to be protected, which allows to reposition it easily if necessary.
  • the masking adhesive seal is packaged under the shape of a continuous length, in particular about 30 meters, in a box in parallelepipedic cardboard.
  • FIG. 1 represents a diagram showing a mode of application of the seal masking adhesive, to illustrate a possible implementation of the process according to the invention.
  • This mode of application corresponds in particular to a step of the masking process or the painting process of at least part of a motor vehicle according to the invention.
  • the masking adhesive joint, 1, comprises a groove, 2, in which can insert a substantial part of a finger, in particular a thumb, 50.
  • the adhesive seal of masking has a section, 30, which has substantially the shape of a half ellipse cut by the groove 2.
  • An adhesive zone, 3, has been deposited on the joint length.
  • the groove has an inner part, 14, an inner part, 15, located on either side of the throat bottom, 4.
  • the inner part, 14, is that which is the closest to the adhesive area, 3.
  • This inner part, 14, presents by relative to the adhesive area, 3, an angle of less than 45 °.
  • a finger, 50 into the groove, 2, and press with this finger, 50, in the direction of the arrow, F 2 , while moving the finger, 50, in the direction of the arrow, F 1 .
  • FIG. 2 represents a diagram of a part of a vehicle comprising areas to be masked, which can be protected by the method according to the invention.
  • the door, 110 is flush, when closed, at the outer edge of the rebate, 101.
  • the body includes an area, 140, shown with hatched lines which is hidden when the door is closed. This area is delimited by a seal, 130, which ensures sealing when the door is closed.
  • a seal, 130 which ensures sealing when the door is closed.
  • the solutions proposed by the invention are particularly suitable for hiding such areas.
  • FIG. 3 represents a diagram of the section, 30, of an adhesive seal of masking, 1, according to the invention in the uncompressed state.
  • the joint section, 1, shown has substantially the shape of a half ellipse in which the groove, 2.
  • the section of this joint is part of a parallelepiped of width, L, and tall, h.
  • the seal, 1, comprises two wings, 10 and 11, located on either side throat, 2. These wings, 10 and 11, each have an inner part, respectively 14 and 15, located on the inner wall of the groove, 2, on the side and on the other side of the groove, 4.
  • the wings, 10 and 11 also each have an external part, 12 and 13 respectively, located on the outer edge of wings 10 and 11.
  • a zone adhesive, 3, is arranged under the external part, 12, of the wing, 10.
  • the part inner, 14, wing, 10, makes an angle, ⁇ , with the adhesive zone, 3, carried by the outer part, 12, of the wing, 10.
  • the angle ⁇ made by the inner part, 14, of the wing, 10, with a plane parallel to the adhesive zone, 3, is identical to the angle ⁇ .
  • the opening of the groove, 2 is defined by the angle, ⁇ + ⁇ , which corresponds to the angle between the inner part, 14, of the wing, 10, and the inner part 15, of the wing, 11.
  • the bottom, 4, of the groove, 2, of the joint shown is rounded and characterized by a means of curvature, R.
  • the two wings have substantially the same length and are substantially flush with the edge of the parallelepiped in the direction of the height.
  • This configuration is not limiting, and we can just as easily use seals according to the invention where the length of one wing, 10 or 11, is substantially less than the length of the other wing, 11 or 12 respectively.
  • the seal shown has a thick edge, 20, located on the side of the wing, 10, opposite the bottom, 4, of the groove, 2.
  • This edge, 20, has a thickness, e.
  • the adhesive area, 3 is, in the case shown, located on a part only on the outer part, 12, of the wing, 10. It is located in an area distant from a distance, d, from the outer edge of the parallelepiped in which fits the section, 30, of the masking adhesive seal, 1.
  • This distance, d can be expressed relative to the width L, by the d / L parameter.
  • FIG. 4 represents an adhesive masking seal, 1, according to the invention after fixing to a fixed part of a vehicle, in this case, not limiting, the amount of a door, 100.
  • the seal, 1, is glued by the adhesive zone, 3, on the rebate, 101, in the zone, 102, of the rebate substantially perpendicular to the surface, 103, to be painted.
  • the figure, 5 represents, in section, a seal, 1, previously arranged according to Figure 4, after closing an opening, in this case a door, 110.
  • the seal 1 crashes and occupies the space between the amount, 100, and door, 110.
  • the joint thus arranged rounds in space exterior, 120, between the upright, 100, and the door, 110.
  • the arc it forms in this area is favorable for subsequent painting of good quality. Indeed we have been able to show that it is preferable (in this mode and in general according to the invention) that the seal does not form a bead exiting towards the outside (in particular outside the vehicle) in this area, as this would result in paint defects, in particular unwanted shading.
  • FIG. 6 represents, in section, a seal, 1, disposed on a fixed part, 200, after closing an opening, 210.
  • This representation corresponds to a observation of a seal according to the invention arranged according to the second mode of preferred implementation of the painting method described above.
  • the fixed part, 200 is a body element on which comes flush with a windshield, 220.
  • the opening, 210 is a hood.
  • the seal, 1, is previously arranged so that the adhesive area, 3, is fixed on a part, 201, of part 200, this part, 201, being situated on a surface on the side of the bodywork opposite the vehicle engine (not shown here).
  • the seal, 1, is arranged in such a way that the cover, 210, opens it by pressing on the wing, 11, of the joint, 1.
  • Tests have shown in particular that with these two embodiments and with a masking adhesive of geometry and defined dimensions with the preferred values of table I, it is possible to seal in a very satisfactory clearance from 3 to 35 mm.
  • the quality of the paint after surface treatment is remarkable and there is no paint line marked or shaded areas, but on the contrary an excellent fade between vehicle areas that have been repainted and others.
  • the invention is not limited to these types of embodiments and must be interpreted non-limiting and encompassing any method of masking at least one edge of a part of a surface to be treated consisting in using an adhesive seal of masking comprising an elongated cellular material, resistant to a treatment of surface and at least one adhesive zone, which comprises at least one groove whose at least part of the wall has an inclined area with an angle of less than 45 ° with respect to the adhesive zone, where the application of said seal can be carried out guiding said joint by the insertion of at least a substantial part of at least one operator's finger in the throat, and where said masking adhesive seal is releasably applied to at least part of the edge of the surface to be treat and is detached after completing treatment.
  • the invention should also be interpreted as encompassing any joint of masking suitable for this masking method.

Abstract

The masking strip (1) consists of a U-section cellular strip resistant to the treatment to be applied to a surface (40), having at least one adhesive external zone (3) and an inner channel (2) with at least part of its wall inclined at 45 degrees to the adhesive zone. The strip is applied by inserting a substantial part of at least one finger (50) in the inner channel and pressing it against the edge of the surface to be treated, e.g. painted, removing it when the treatment is complete.

Description

L'invention se rapporte au domaine du masquage. On entend par masquage une étape dans un procédé de traitement d'une surface où au moins une partie de la surface à traiter est recouverte, généralement de manière temporaire, de manière à préserver ladite surface dudit traitement.The invention relates to the field of masking. We hear by masking a step in a method of treating a surface where at least part of the surface to be treated is covered, generally so temporary, so as to preserve said surface of said treatment.

L'invention concerne une méthode de masquage, ainsi qu'une méthode de peinture d'au moins une partie d'un véhicule automobile, et concerne également un joint adhésif de masquage adapté auxdites méthodes de masquage et de peinture, et un procédé de fabrication dudit joint.The invention relates to a masking method, as well as a method of painting of at least part of a motor vehicle, and also relates to a masking adhesive seal adapted to said methods of masking and paint, and a method of manufacturing said seal.

Des méthodes de masquage sont couramment utilisées dans tout type d'industrie, par exemple dans celles où un procédé nécessite une étape de peinture, notamment dans la réparation automobile.Masking methods are commonly used in all types of industry, for example in those where a process requires a step of painting, especially in car repair.

De telles méthodes et des joints adhésifs de masquage adaptés sont notamment décrits dans les brevets suivants : EP-B-0 365 510, EP-B-0 384 626. Le brevet EP-B-0 365 510 décrit une méthode de masquage qui comprend l'utilisation d'un bourrelet de matériau cellulaire, allongé, compressible, flexible, qui est résistant à un traitement de surface, pour masquer au moins une partie d'une surface à traiter. Ledit bourrelet de matériau cellulaire est appliqué de façon détachable sur la partie de la surface à traiter et est détaché après avoir terminé le traitement. Ledit bourrelet de matériau cellulaire constitue un joint adhésif de masquage. Ce joint est disposé sur la surface à traiter à la main ou à l'aide d'un outil qui permet de distribuer le joint.Such methods and suitable masking adhesive seals are described in particular in the following patents: EP-B-0 365 510, EP-B-0 384 626. EP-B-0 365 510 describes a masking method which comprises the use of a bead of cellular material, elongated, compressible, flexible, which is resistant to surface treatment, to mask at least part of a surface to be treated. Said bead of cellular material is applied so detachable on the part of the surface to be treated and is detached after completing the treatment. Said bead of cellular material constitutes an adhesive seal of masking. This seal is placed on the surface to be treated by hand or using a tool to distribute the seal.

Il apparaít clairement de la description et des figures que le joint adhésif de masquage décrit dans ce document est de géométrie sensiblement cylindrique ou parallèlépipédique et qu'on le dispose sur la surface à traiter à l'aide d'une pression appliquée sur la face extérieur du joint, opposée à la face adhésive qui est mise en contact avec la surface à traiter.It is clear from the description and the figures that the adhesive seal of masking described in this document is of substantially cylindrical geometry or parallelepipedic and that it is placed on the surface to be treated using a pressure applied to the outside face of the seal, opposite to the adhesive face which is brought into contact with the surface to be treated.

Le document EP-B-0 384 626 décrit des articles en mousse formés de mousse soudable à froid susceptibles d'être utilisés comme joints adhésifs de masquage. De même que précédemment, la géométrie de ces joints est sensiblement cylindrique et leur application s'effectue en pressant sur la partie extérieure du joint, opposée à la partie revêtue d'un adhésif.EP-B-0 384 626 describes foam articles formed from cold weldable foam which can be used as adhesive seals for masking. As before, the geometry of these joints is substantially cylindrical and their application is made by pressing on the part outside of the seal, opposite the part coated with an adhesive.

Ce type de joint, bien que très couramment utilisé, notamment dans le domaine de la réparation automobile, présente plusieurs inconvénients.This type of seal, although very commonly used, especially in the automotive repair has several drawbacks.

D'une part le positionnement sur une surface à masquer est rendu difficile par la géométrie de ces joints pour certaines pièces à protéger. En effet la forme des carrosseries est très diversifiée et tend à être de plus en plus complexe, notamment avec des bords de pièces de carrosserie qui dessinent des courbes avec des rayons de courbure faibles, voire même présentant des angles aigus. Dans ces conditions il est difficile de positionner et de presser en même temps pour appliquer les joints adhésifs de masquage décrits ci-dessus. On est généralement amené à devoir utiliser plusieurs doigts d'une ou même de deux mains pour faire suivre à ces joints les bords d'une carrosserie que l'on entend protéger. La géométrie de ces joints, cylindrique ou parallélépipédique, autorise un rayon de courbure limité et il faut forcer la déformation de ces joints, voire même les inciser pour leur faire suivre un tracé complexe.On the one hand, positioning on a surface to be masked is made difficult by the geometry of these joints for certain parts to be protected. Indeed the shape bodywork is very diverse and tends to be more and more complex, especially with edges of body parts which curve with small radii of curvature, or even with acute angles. In these conditions it is difficult to position and press at the same time to apply the masking adhesive seals described above. We are generally having to use several fingers of one or even two hands to make these joints follow the edges of a body that we hear protect. The geometry of these joints, cylindrical or parallelepiped, allows a limited radius of curvature and it is necessary to force the deformation of these joints, or even incise them to make them follow a complex path.

II arrive que les joints ainsi posés sous forte contrainte se détendent et ne suivent plus le tracé souhaité. On est alors amené à les décoller et à les repositionner ce qui est une opération coûteuse en temps. En outre le joint est alors moins adhérant à la surface à traiter et risque de se déplacer, ce qui peut créer des défauts, notamment des défauts de peinture, lors des opérations ultérieures de traitement de surface.It happens that the joints thus placed under strong stress relax and do not no longer follow the desired route. We are then led to take them off and to reposition what is a time consuming operation. In addition the seal is then less adherent to the surface to be treated and risk of moving, which can create defects, including paint defects, during operations subsequent surface treatment.

Un autre problème lié aux joints adhésifs de masquage mentionnés ci-dessus a trait au fait que la géométrie d'un tel type de joint ne permet pas de l'adapter à l'ensemble des pièces que l'on entend protéger dans un véhicule. En effet les joints adhésifs de masquage sont notamment utilisés pour protéger un espace situé entre une partie mobile et une partie fixe d'un véhicule. On entend par partie fixe les pièces de carrosserie formant la structure du véhicule, notamment la caisse, les ailes, les montants, le toit, et on entend par parties mobiles des pièces susceptibles de se mouvoir par rapport aux parties fixes, notamment des portes, un capot, un hayon.Another problem with the masking tape mentioned above relates to the fact that the geometry of such a type of joint does not allow adapt it to all the parts that you want to protect in a vehicle. In masking adhesive seals are used in particular to protect a space located between a mobile part and a fixed part of a vehicle. We hear by fixed part the body parts forming the structure of the vehicle, in particular the body, the wings, the uprights, the roof, and by parts moving parts liable to move relative to the fixed parts, including doors, hood, tailgate.

Or l'écartement entre les différentes parties fixes et les différentes parties mobiles diffère très sensiblement d'une partie d'un même véhicule à une autre. The distance between the different fixed parts and the different parts mobile differs very significantly from one part of the same vehicle to another.

Pour protéger une partie de véhicule par masquage, notamment avant mise en peinture, il est nécessaire d'occulter de manière étanche à la peinture cet espace, ce que l'on obtient en comprimant légèrement le joint adhésif de masquage disposé sur une partie fixe ou mobile contre l'autre partie, respectivement mobile ou fixe. Les joints adhésifs de masquage décrits ci-dessus ne permettent pas de s'adapter, en général, à l'ensemble des écartements que l'on peut rencontrer sur un même véhicule, et davantage encore sur des véhicules de types différents. On est alors amené à utiliser plusieurs dimensions d'un type de joints adhésifs de masquage dans un même atelier de réparation automobile, voire même pour préparer un même véhicule. Pour un même type de joint la forme générale du joint est sensiblement identique, et seules varient les dimensions des joints utilisés pour s'adapter entre les différents écartements. Les écarts de dimension entre joints d'un même type, notamment de la plus grande dimension de la section d'un tel joint, peuvent atteindre un facteur deux. Il est usuel de trouver dans un atelier de réparation des joints adhésifs de masquage de même type et de trois dimensions de section différentes.To protect a part of a vehicle by masking, especially before putting in painting, it is necessary to conceal in a watertight manner this paint space, which is obtained by slightly compressing the adhesive seal of masking disposed on a fixed or movable part against the other part, respectively mobile or fixed. The masking adhesive seals described above do not make it possible to adapt, in general, to all the spacings that you can meet on the same vehicle, and even more on vehicles of different types. We are then led to use several dimensions of a type masking adhesive seals in the same auto repair shop, or even to prepare the same vehicle. For the same type of joint the general shape of the joint is substantially identical, and only the dimensions of the joints used to fit between the different spacings. The dimension differences between joints of the same type, in particular of the largest dimension of the section of such a joint, can reach a factor of two. It is usual to find in a repair shop masking adhesive seals same type and three different section dimensions.

Il en résulte des stocks importants et des manipulations multipliées.This results in large stocks and increased handling.

Le but de la présente invention est de remédier aux inconvénients ci-dessus, notamment en permettant une mise en place facilitée du joint adhésif de masquage, et de manière subsidiaire en utilisant un joint susceptible de s'adapter à une grande variation d'écartement entre parties fixes et parties mobiles, notamment pour l'ensemble d'un même véhicule, voire même pour tout véhicule.The aim of the present invention is to remedy the above drawbacks, in particular by allowing easier fitting of the adhesive seal of masking, and in the alternative using a seal capable of adapting a large variation in spacing between fixed parts and mobile parts, in particular for the whole of the same vehicle, or even for any vehicle.

Le problème de la mise en place facilitée d'un joint adhésif de masquage est résolu par une méthode de masquage d'au moins un bord d'une partie d'une surface à traiter consistant à utiliser un joint adhésif de masquage comprenant un matériau cellulaire allongé résistant à un traitement de surface et au moins une zone adhésive, et qui comprend au moins une gorge dont au moins une partie de la paroi présente une zone inclinée d'un angle de moins de 45° par rapport à la zone adhésive. L'application dudit joint peut s'effectuer en guidant ledit joint par l'insertion d'au moins une partie d'au moins un doigt d'un opérateur dans la gorge. Ledit joint adhésif de masquage est appliqué de façon détachable sur au moins une partie du bord de la surface à traiter et est détaché après avoir terminé le traitement. The problem of the easy installation of an adhesive masking joint is solved by a method of masking at least one edge of part of a surface to be treated consisting in using an adhesive masking seal comprising a elongated cellular material resistant to surface treatment and at least one adhesive zone, and which comprises at least one groove of which at least part of the wall has an inclined area at an angle of less than 45 ° relative to the adhesive area. The application of said seal can be carried out by guiding said seal by the insertion of at least part of at least one operator's finger into the throat. Said masking adhesive seal is applied in a detachable manner to at least one part of the edge of the surface to be treated and is detached after completing the treatment.

La forme particulière du joint permet de le guider très aisément pendant qu'on l'applique sur une partie de la surface à traiter. On peut en effet insérer partiellement un doigt (en particulier une partie substantielle d'au moins un doigt), notamment un pouce, dans la gorge dudit joint adhésif de masquage. Le doigt inséré dans la gorge sert à presser la zone de la gorge inclinée à moins de 45° par rapport à la zone adhésive pour fixer le joint sur la surface à traiter et simultanément à guider le joint, en déplaçant le doigt dans la gorge de manière à faire suivre au joint le tracé désiré.The particular shape of the joint makes it very easy to guide it during that it is applied to part of the surface to be treated. We can indeed insert partially a finger (in particular a substantial part of at least one finger), in particular a thumb, in the groove of said masking adhesive joint. Finger inserted into the throat is used to press the throat area inclined at less than 45 ° by report to the adhesive area to fix the joint on the surface to be treated and simultaneously guiding the joint, moving the finger in the groove so that follow the desired route to the joint.

On a pu constater que le fait que le joint adhésif de masquage comprenne une gorge telle que définie facilite considérablement le positionnement du joint le long d'un tracé ayant un faible rayon de courbure ou présentant un angle aigu.We have seen that the fact that the masking adhesive seal includes a groove as defined considerably facilitates the positioning of the seal the along a path with a small radius of curvature or with an acute angle.

De manière avantageuse l'application du joint s'effectue en guidant continûment ledit joint à l'aide du (ou des) doigt(s) d'un opérateur, inséré(s) dans la gorge et le (ou les) doigt(s) effectue(nt) simultanément un déplacement longitudinal dans la gorge et applique(nt) une pression suffisante sur une partie de la surface de la gorge pour permettre l'adhésion d'au moins une zone adhésive du joint adhésif de masquage sur au moins une partie du bord de la surface à traiter.Advantageously, the application of the seal is carried out by guiding continuously said joint using the finger (s) of an operator, inserted in throat and finger (s) simultaneously move (s) longitudinal in the groove and apply (s) sufficient pressure on part of the surface of the groove to allow adhesion of at least one adhesive zone of the masking adhesive seal on at least part of the edge of the surface to be treated.

On peut notamment faciliter le guidage du joint en disposant au moins un autre doigt, par exemple de la main dont un doigt est inséré dans ladite gorge, sur la face externe du joint, en regard avec le doigt inséré dans la gorge. On peut ainsi faire adhérer le joint adhésif de masquage très facilement grâce au déplacement des doigts, et de manière extrêmement précise.One can in particular facilitate the guiding of the joint by having at least one other finger, for example of the hand with a finger inserted in said groove, on the external face of the seal, facing with the finger inserted in the groove. We can thus adhere the masking adhesive very easily thanks to the displacement fingers, and extremely precisely.

L'invention concerne également une méthode de peinture d'au moins une partie d'un véhicule automobile qui comprend une étape de masquage définie ci-dessus.The invention also relates to a method of painting at least one part of a motor vehicle which comprises a masking step defined above.

En règle générale et selon les modes de réalisation, on comprime ou on écarte (ou ouvre) le joint, en particulier en agissant sur les parties du joint de part et d'autre de la gorge, en les rapprochant ou en les écartant, lors de l'utilisation dudit joint, comme explicité ci-après.As a general rule and according to the embodiments, it is compressed or spreads (or opens) the joint, in particular by acting on the parts of the joint on the other side of the throat, moving them closer or further apart, during use of said joint, as explained below.

Selon un premier mode de réalisation préféré de cette méthode de peinture, le joint adhésif de masquage est appliqué sur une partie du véhicule puis comprimé par une autre partie dudit véhicule.According to a first preferred embodiment of this painting method, the masking adhesive seal is applied to part of the vehicle then compressed by another part of said vehicle.

De manière avantageuse, le joint adhésif de masquage est appliqué sur une partie fixe du véhicule, notamment de la carrosserie du véhicule et l'autre partie qui vient comprimer ledit joint est sur une partie mobile, notamment un ouvrant du véhicule, par exemple une porte, et/ou un hayon, et/ou un capot.Advantageously, the masking adhesive seal is applied to a fixed part of the vehicle, in particular of the vehicle body and the other part which compresses said seal is on a movable part, in particular a opening the vehicle, for example a door, and / or a tailgate, and / or a hood.

On entend par partie fixe du véhicule une partie qui ne peut se mouvoir quant le véhicule est à l'arrêt, comme par exemple la caisse du véhicule.By fixed part of the vehicle is meant a part which cannot move when the vehicle is stationary, for example the body of the vehicle.

On entend par partie mobile du véhicule une partie, qui quand le véhicule est à l'arrêt, peut être déplacée par rapport aux parties fixes du véhicule, par exemple par démontage ou par exemple par l'actionnement des moyens qui permettent l'ouverture d'un ouvrant, comme par exemple des portières, capots, hayons.Mobile part of the vehicle means a part, which when the vehicle is stationary, can be moved relative to the fixed parts of the vehicle, by example by dismantling or for example by actuating the means which allow the opening of an opening, such as doors, hoods, tailgates.

Selon un deuxième mode de réalisation préféré, le joint adhésif de masquage est appliqué sur une partie du véhicule, notamment sur une partie fixe, et les côtés d'au moins une gorge sont écartés par une seconde partie du véhicule, notamment une partie mobile. Dans ce cas, on peut ouvrir au préalable légèrement le joint adhésif de masquage au niveau de la gorge et laisser une partie du véhicule ouvrir davantage le joint, notamment quand une partie mobile vient prendre position contre une partie fixe. Le joint s'écarte et vient se plaquer sur la deuxième partie en regard avec la première. Cette variante est particulièrement avantageuse pour protéger une zone située notamment entre un capot et une carrosserie, du côté de la carrosserie où vient affleurer un pare-brise.According to a second preferred embodiment, the adhesive seal of masking is applied to a part of the vehicle, in particular to a fixed part, and the sides of at least one groove are separated by a second part of the vehicle, in particular a mobile part. In this case, you can open beforehand slightly the masking adhesive seal at the level of the throat and leave a part of the vehicle open the seal further, especially when a moving part comes to take a stand against a fixed part. The seal moves aside and comes to be pressed on the second part next to the first. This variant is particularly advantageous for protecting an area located in particular between a hood and bodywork, on the side of the bodywork where a windscreen is flush.

Il est ainsi possible de préparer avec efficacité le véhicule lors de l'étape précédant la mise en peinture, et après séchage de la peinture, d'enlever le joint adhésif de masquage.It is thus possible to efficiently prepare the vehicle during the stage before painting, and after the paint has dried, remove the seal masking tape.

De manière encore plus avantageuse, un même joint de masquage peut être utilisé pour masquer un espace entre la carrosserie et un ouvrant du véhicule, quel que soit l'ouvrant du véhicule.Even more advantageously, the same masking joint can be used to mask a space between the bodywork and an opening leaf of the vehicle, whatever the opening of the vehicle.

La mise en oeuvre de l'étape de masquage est ainsi grandement facilitée et il en résulte un gain de temps très appréciable.The implementation of the masking step is thus greatly facilitated and this results in a very appreciable saving of time.

En outre, le stock de produit nécessaire à l'étape de masquage est réduit car un seul type de joint adhésif de masquage convient pour l'ensemble des parties à masquer d'un véhicule.In addition, the product stock required for the masking step is reduced because only one type of masking adhesive seal is suitable for all parts to hide from a vehicle.

L'invention concerne également le joint adhésif de masquage destiné à être utilisé pour la mise en oeuvre de la méthode de masquage ou de la méthode de peinture décrites ci-dessus. The invention also relates to the masking adhesive seal intended to be used for the implementation of the masking method or the painting described above.

Ce joint adhésif de masquage comprend un matériau cellulaire allongé, résistant à un traitement de surface et au moins une zone adhésive susceptible d'être détachée après avoir terminé le traitement de surface et au moins une gorge, dont au moins une partie de la paroi présente une zone inclinée de moins de 45° par rapport à la zone adhésive, dans laquelle on peut introduire au moins une partie d'un doigt, notamment d'un pouce.This masking adhesive joint comprises an elongated cellular material, resistant to surface treatment and at least one adhesive area susceptible to be detached after having finished the surface treatment and at least one groove, at least part of the wall of which has an inclined area of less 45 ° to the adhesive area, into which at least one can be inserted part of a finger, especially a thumb.

La dimension de la gorge est telle que l'on peut introduire une partie d'une phalange suffisante pour guider le joint adhésif de masquage tout en appliquant ce dernier de manière adhésive sur une surface à traiter.The size of the groove is such that part of a sufficient phalanx to guide the masking adhesive seal while applying this the latter in an adhesive manner on a surface to be treated.

De manière générale le joint adhésif de masquage se présente sous la forme d'une bande très allongée, notamment de plusieurs mètres de longueur.Generally the masking adhesive seal is present under the form of a very elongated strip, in particular several meters in length.

La section de cette bande est généralement uniforme sur toute sa longueur. De légères variations de dimensions peuvent exister, notamment dans les cas où des bandes, de longueur inférieure à la longueur de la bande finale, ont été raboutées.The section of this strip is generally uniform over its entire length. Slight variations in dimensions may exist, especially in cases where strips, of length less than the length of the final strip, have been butted.

Usuellement la forme de la section du joint non comprimé s'inscrit aisément dans un parallélépipède, et de manière préférée dans une demi ellipse, elle-même inscrite dans ledit parallélépipède.Usually the shape of the section of the uncompressed joint fits easily in a parallelepiped, and preferably in a half ellipse, itself inscribed in said parallelepiped.

De préférence, le joint adhésif de masquage comprend une unique gorge de guidage et deux ailes situées de part et d'autre de cette gorge, avec sur au moins l'une des ailes, au moins une zone adhésive située sur la partie extérieure, c'est-à-dire du côté de l'aile opposée à la gorge.Preferably, the masking adhesive joint comprises a single groove guide and two wings located on either side of this groove, with on at at least one of the wings, at least one adhesive zone located on the outside, that is to say on the side of the wing opposite the throat.

On entend par gorge de guidage, une gorge où l'on est susceptible d'insérer une partie, en particulier une partie substantielle, d'un doigt.By guide groove is meant a groove where one is susceptible to insert a part, in particular a substantial part, of a finger.

Dans la suite du texte on désigne par « gorge » une telle gorge de guidage. On n'exclut nullement la présence d'autres gorges sur le joint adhésif de masquage selon l'invention ayant par exemple une fonction autre que celle de guidage ainsi définie.In the following text, the term "groove" designates such a guide groove. We do not exclude the presence of other grooves on the adhesive seal of masking according to the invention having for example a function other than that of guidance thus defined.

La partie intérieure de l'aile dernièrement mentionnée présente une zone inclinée d'un angle de moins de 45°, de préférence moins de 30°, par rapport à la partie extérieure de cette aile, sur laquelle se situe ladite zone adhésive. Cet angle d'inclinaison est également avantageusement non nul, c'est-à-dire il est compris entre 0 et 45° et de préférence entre 0 et 30°. The inner part of the wing mentioned above has an area inclined at an angle of less than 45 °, preferably less than 30 °, relative to the outer part of this wing, on which said adhesive zone is located. This angle inclination is also advantageously non-zero, that is to say it is understood between 0 and 45 ° and preferably between 0 and 30 °.

Selon une variante avantageuse, la section du joint adhésif de masquage s'inscrit dans un parallélépipède de 5 à 40 mm de côté, notamment de 10 à 25 mm de côté et de 3 à 40 mm de hauteur, notamment de 10 à 25 mm de hauteur, à l'état non comprimé du joint, et est susceptible d'être comprimé au moins de la moitié dans une dimension (en particulier dans la hauteur).According to an advantageous variant, the section of the masking adhesive joint fits into a parallelepiped from 5 to 40 mm on a side, in particular from 10 to 25 mm side and from 3 to 40 mm in height, in particular from 10 to 25 mm in height, at the uncompressed state of the seal, and is likely to be compressed at least from the half in one dimension (especially in height).

Cette variante est particulièrement adaptée à la préparation par masquage de véhicules automobiles. Des hauteurs du joint, non comprimé, de 10 à 25 mm, notamment autour de 20 mm permettent d'utiliser un tel joint pour masquer l'ensemble des espaces entre parties fixes et parties ouvrantes d'une automobile.This variant is particularly suitable for preparation by masking of motor vehicles. Joint heights, uncompressed, from 10 to 25 mm, especially around 20 mm allow to use such a seal to mask all the spaces between fixed parts and opening parts of an automobile.

On entend par « hauteur » du joint la dimension de la section du joint du côté dans lequel la gorge est découpée. En général la hauteur est sensiblement perpendiculaire à au moins une zone adhésive, cette zone adhésive étant celle sur laquelle un doigt inséré dans le joint appuie lors de l'opération de pose du joint.The term “height” of the joint means the dimension of the joint section of the side in which the groove is cut. In general the height is appreciably perpendicular to at least one adhesive zone, this adhesive zone being that on which a finger inserted in the joint presses during the installation operation of the seal.

Selon une variante avantageuse, la gorge du joint adhésif de masquage est une gorge en V avec un fond de gorge arrondi. De même le côté du joint opposé à la gorge est préférentiellement arrondi. La partie intérieure de l'aile située entre la gorge et une zone adhésive, et la partie intérieure de l'aile située de l'autre côté de la gorge font de préférence un angle, α + β, compris entre 20 et 80°, notamment plus de 40°, et de préférence moins de 70°, quand le joint n'est pas comprimé.According to an advantageous variant, the groove of the masking adhesive seal is a V-shaped throat with a rounded throat bottom. Similarly, the side of the seal opposite to the throat is preferably rounded. The inner part of the wing located between the throat and an adhesive area, and the inner part of the wing located on the other side of the groove preferably has an angle, α + β, of between 20 and 80 °, in particular more than 40 °, and preferably less than 70 °, when the joint is not compressed.

Dans une variante encore plus avantageuse, le fond de gorge a un rayon de courbure, R, compris entre 5 et 30 mm, de préférence plus de 8 mm et notamment moins de 20 mm, quand le joint n'est pas comprimé.In an even more advantageous variant, the bottom of the groove has a radius curvature, R, between 5 and 30 mm, preferably more than 8 mm and especially less than 20 mm, when the joint is not compressed.

Selon un autre mode de réalisation, la zone adhésive, de l'aile qui est située entre la gorge et ladite zone adhésive, présente une surface plane et l'angle, α, de cette surface avec la partie intérieure de cette même aile est inférieur à l'angle, β, que fait la paroi intérieure de l'aile opposée, située de l'autre côté de la gorge avec la même surface plane de la zone adhésive, quand le joint n'est pas comprimé.According to another embodiment, the adhesive zone, of the wing which is located between the groove and said adhesive area, has a flat surface and the angle, α, of this surface with the interior part of this same wing is less than the angle, β, made by the inner wall of the opposite wing, located on the other side of the groove with the same flat surface of the adhesive area, when the joint is not compressed.

Cette disposition facilite grandement l'utilisation du joint pour le masquage. Elle facilite d'une part l'insertion du doigt pour le guidage et permet d'appuyer facilement pour le faire coller sur la surface à protéger. D'autre part on dispose ainsi d'un grande aptitude à accomoder des espaces à masquer de dimension différente. Cette configuration est très appropriée à la fois aux espaces à masquer entre une partie fixe et une partie mobile où l'on souhaite procéder à un masquage en venant écraser le joint (avantageusement en rapprochant les côtés de la gorge), et aux espaces entre de telles parties où l'on souhaite procéder à un masquage par écartement des côtés de la gorge du joint.This arrangement greatly facilitates the use of the seal for masking. It facilitates on the one hand the insertion of the finger for guiding and makes it possible to press easily to make it stick on the surface to be protected. On the other hand we have thus a great ability to accommodate large areas to hide different. This configuration is very suitable for both the spaces to be hidden between a fixed part and a mobile part where one wishes to proceed to a masking by crushing the joint (advantageously by bringing the sides of the throat), and the spaces between such parts where one wishes to masking by spacing the sides of the groove of the joint.

Cette configuration a en outre l'avantage, dans le cas où l'on vient écraser le joint, de faciliter le glissement de l'aile opposée à l'aile sur laquelle se situe la zone adhésive.This configuration also has the advantage, in the case where one comes to overwrite the seal, to facilitate the sliding of the wing opposite to the wing on which the adhesive area.

Il est apparu au cours d'essais que selon une variante particulièrement avantageuse, β est supérieur à α de 3° à 30°, de préférence de plus de 5° et notamment de moins de 15°.It appeared during tests that according to a particularly variant advantageous, β is greater than α by 3 ° to 30 °, preferably by more than 5 ° and especially less than 15 °.

Dans une autre version du joint adhésif de masquage selon l'invention, quand le joint est comprimé, l'aile située du côté de la gorge opposée à l'aile sur laquelle est située au moins une zone adhésive déborde par rapport à l'aile sur laquelle est située au moins une zone adhésive.In another version of the masking adhesive seal according to the invention, when the joint is compressed, the wing located on the side of the groove opposite the wing on which is located at least one adhesive zone projects beyond the wing on which is located at least one adhesive zone.

Ce débordement permet une excellente adaptation du joint aux différentes parties d'un véhicule. Des essais ont permis de montrer que cette caractéristique est particulièrement avantageuse et appréciée des professionnels de la réparation automobile.This overflow allows an excellent adaptation of the seal to the different parts of a vehicle. Tests have shown that this characteristic is particularly advantageous and appreciated by repair professionals automobile.

Il est apparu, dans certains cas, utile de limiter le débordement mentionné ci-dessus. Ainsi selon une variante de l'invention, l'aile, sur laquelle est située au moins une zone adhésive, comprend un bord situé du côté de l'aile opposé au fond de la gorge permettant de bloquer le déplacement de l'aile quand on comprime le joint. L'épaisseur du bord, e, est notamment comprise entre 1 et 10 mm, de préférence 2 à 5 mm, quand le joint n'est pas comprimé.It appeared, in certain cases, useful to limit the overflow mentioned above. Thus according to a variant of the invention, the wing, on which is located at minus an adhesive zone, includes an edge located on the side of the wing opposite the back of the throat to block the movement of the wing when compresses the joint. The thickness of the edge, e, is in particular between 1 and 10 mm, preferably 2 to 5 mm, when the joint is not compressed.

Les différents essais ont également mis en évidence, que de manière préférée, le positionnement de la zone adhésive est situé davantage du côté du joint où la gorge a été taillée que de l'autre côté. Notamment dans le cas où le joint adhésif de masquage comprend une seule zone adhésive située sur la partie extérieure d'une aile, ladite zone adhésive est disposée de manière dissymétrique sur la partie extérieure de cette aile, et majoritairement sur la partie extérieure de cette aile proche du bord extérieur de cette aile. Elle est notamment disposée sensiblement sur les deux tiers de la surface de la partie extérieure de l'aile en partant du bord extérieur de cette aile. The various tests have also shown that preferred, the positioning of the adhesive zone is located more on the side of the joint where the groove was cut only on the other side. Especially in the case where the masking adhesive seal includes a single adhesive zone located on the part exterior of a wing, said adhesive zone is asymmetrically arranged on the outer part of this wing, and mainly on the outer part of this wing close to the outer edge of this wing. She is particularly willing substantially on two thirds of the surface of the outer part of the wing in starting from the outer edge of this wing.

On a pu constater, au cours d'essais, que cette configuration évitait de déposer de l'adhésif dans des zones proches du bord externe du joint, du côté opposé à la gorge. Cette configuration est particulièrement avantageuse car dans ces zones le joint prend la forme d'un arc qui va doucement tangenter les deux surfaces qui maintiennent le joint. On constate que, lors d'une opération de peinture, la répartition de peinture est très satisfaisante car on évite ainsi d'obtenir une ligne marquée de peinture qui mettrait trop en évidence la zone où l'on a procédé à des repeints, tout en masquant les zones où l'on ne souhaite pas que la peinture pénètre. On obtient ainsi un léger brouillard de peinture dans cette zone qui conduit à une zone de transition qui n'est plus décelable quand les opérations de peinture sont achevées.We have seen, during tests, that this configuration avoids apply adhesive in areas close to the outer edge of the joint, on the side opposite the throat. This configuration is particularly advantageous because in these areas the joint takes the form of an arc which will gently tangent the two surfaces that hold the joint. We note that, during an operation of paint, the paint distribution is very satisfactory because this avoids obtaining a marked line of paint that would highlight the area where you have repainted, while hiding areas where you do not want the paint penetrates. This gives a slight mist of paint in this area which leads to a transition zone which is no longer detectable when operations of painting are completed.

De manière préférée le matériau cellulaire allongé utilisé pour le joint adhésif de masquage selon l'invention est une mousse de polyuréthanne.Preferably the elongated cellular material used for the joint masking adhesive according to the invention is a polyurethane foam.

On choisira de préférence une mousse à base de polyester pour une utilisation avec des peintures à base de solvant organique, et une mousse à base de polyéther pour des peintures à l'eau.We will preferably choose a polyester-based foam for a use with paints based on organic solvent, and foam based polyether for water-based paints.

Les mousses à base de polyester de la société RECTICEL conviennent pour ces applications, notamment les mousses référencées S357 et SF367D. Ces mousses ont des tailles de cellules de l'ordre de 500 à 1000 µm.RECTICEL polyester foams are suitable for these applications, in particular the foams referenced S357 and SF367D. These foams have cell sizes in the range of 500 to 1000 µm.

Les mousses de polyuréthanne permettent de résister de manière satisfaisante à un traitement de surface, notamment à la mise en peinture et de supporter le traitement thermique correspondant sans dommage. La mise en peinture conduit usuellement à porter les pièces à traiter à environ 70°C pendant environ 30 minutes. A l'issue de ce traitement et après refroidissement le joint peut être ôté facilement.Polyurethane foams make it possible to resist so satisfactory to a surface treatment, in particular to painting and withstand the corresponding heat treatment without damage. Setting painting usually leads to bringing the parts to be treated to around 70 ° C. for about 30 minutes. At the end of this treatment and after cooling the seal can be easily removed.

En outre un joint en mousse de polyuréthanne selon l'invention présente l'avantage de se couper facilement à la main avec peu de déformation, et de s'allonger très peu quand il est appliqué sur une pièce à protéger, ce qui permet de le repositionner aisément en cas de besoin.In addition, a polyurethane foam seal according to the invention has the advantage of being easily cut by hand with little deformation, and elongate very little when applied to a part to be protected, which allows to reposition it easily if necessary.

L'invention concerne également, un procédé de fabrication du joint adhésif de masquage selon l'invention, qui comprend au moins les étapes suivantes :

  • fabrication de blocs de matériau cellulaire par expansion contrôlée ;
  • découpe dans les blocs de bandes de matériau cellulaire ;
  • usinage des bandes de matériau cellulaire par meulage et/ou découpe et/ou déformation à chaud pour obtenir la forme du joint adhésif de masquage ;
  • dépose d'adhésif repositionnable et/ou d'au moins une bande adhésive sur au moins une partie des bandes de matériau cellulaire usinées pour former au moins une zone adhésive.
The invention also relates to a method of manufacturing the adhesive masking joint according to the invention, which comprises at least the following steps:
  • manufacture of blocks of cellular material by controlled expansion;
  • cutting from the blocks of strips of cellular material;
  • machining the strips of cellular material by grinding and / or cutting and / or hot deformation to obtain the shape of the adhesive masking joint;
  • depositing repositionable adhesive and / or at least one adhesive strip on at least part of the strips of cellular material machined to form at least one adhesive zone.

Ce procédé peut comprendre en outre au moins l'une des étapes optionnelles suivantes :

  • dépoussiérage par soufflage et/ou brossage et/ou aspiration ;
  • dépose d'un produit de fixation des poussières ;
  • raboutage de bandes entre elles, notamment par collage et/ou soudure ;
  • enroulement d'au moins une bande de joint adhésif de masquage sur au moins un tambour pour faciliter le conditionnement ;
  • conditionnement d'au moins une bande de joint adhésif de masquage dans une boite en carton parallélépipédique.
This method can also comprise at least one of the following optional steps:
  • dusting by blowing and / or brushing and / or vacuuming;
  • depositing a dust fixing product;
  • joining bands together, in particular by gluing and / or welding;
  • winding of at least one strip of masking adhesive seal on at least one drum to facilitate packaging;
  • packaging of at least one strip of masking adhesive seal in a rectangular cardboard box.

De manière avantageuse le joint adhésif de masquage est conditionné sous la forme d'une longueur continue, notamment d'environ 30 mètres, dans une boíte en carton parallélépipédique.Advantageously, the masking adhesive seal is packaged under the shape of a continuous length, in particular about 30 meters, in a box in parallelepipedic cardboard.

D'autres détails et caractéristiques avantageux de l'invention ressortiront ci-après, de la description d'exemples de réalisation de l'invention en référence aux figures annexées qui représentent :

  • figure 1 : schéma d'un mode d'application du joint adhésif de masquage selon l'invention ;
  • figure 2 : schéma d'une partie d'un véhicule comprenant des zones à masquer ;
  • figure 3 : schéma de la section d'un joint adhésif de masquage selon l'invention ;
  • figure 4 : schéma, vu en coupe, d'un joint adhésif de masquage disposé sur une partie fixe d'un véhicule, selon un premier mode de réalisation ;
  • figure 5 : schéma, vu en coupe, du joint adhésif de masquage correspondant à la figure 4 après fermeture d'un ouvrant ;
  • figure 6 : schéma, vu en coupe, d'un joint adhésif de masquage disposé sur une partie fixe et après fermeture d'un ouvrant selon un deuxième mode de réalisation.
Other details and advantageous characteristics of the invention will emerge below, from the description of exemplary embodiments of the invention with reference to the appended figures which represent:
  • Figure 1 : diagram of an application mode of the masking adhesive seal according to the invention;
  • Figure 2 : diagram of a part of a vehicle comprising areas to be masked;
  • Figure 3 : diagram of the section of a masking adhesive seal according to the invention;
  • Figure 4 : diagram, seen in section, of a masking adhesive seal disposed on a fixed part of a vehicle, according to a first embodiment;
  • Figure 5 : diagram, seen in section, of the masking adhesive seal corresponding to Figure 4 after closing an opening;
  • Figure 6 : diagram, seen in section, of a masking adhesive seal disposed on a fixed part and after closing an opening according to a second embodiment.

On précise tout d'abord que, par soucis de clarté, toutes les figures ne respectent pas rigoureusement les proportions entre les divers éléments représentés.It should be noted first of all that, for the sake of clarity, all the figures do not not strictly respect the proportions between the various elements represented.

La figure 1 représente un schéma montrant un mode d'application du joint adhésif de masquage, permettant d'illustrer une mise en oeuvre possible du procédé selon l'invention. Ce mode d'application correspond notamment à une étape du procédé de masquage ou du procédé de peinture d'au moins une partie d'un véhicule automobile selon l'invention.FIG. 1 represents a diagram showing a mode of application of the seal masking adhesive, to illustrate a possible implementation of the process according to the invention. This mode of application corresponds in particular to a step of the masking process or the painting process of at least part of a motor vehicle according to the invention.

Le joint adhésif de masquage, 1, comprend une gorge, 2, dans laquelle on peut insérer une partie substantielle d'un doigt, notamment un pouce, 50.The masking adhesive joint, 1, comprises a groove, 2, in which can insert a substantial part of a finger, in particular a thumb, 50.

Dans cette représentation, qui n'est nullement limitative, le joint adhésif de masquage présente une section, 30, qui a sensiblement la forme d'une demi ellipse entaillée par la gorge 2. Une zone adhésive, 3, a été déposée sur la longueur du joint.In this representation, which is by no means limiting, the adhesive seal of masking has a section, 30, which has substantially the shape of a half ellipse cut by the groove 2. An adhesive zone, 3, has been deposited on the joint length.

La gorge présente une partie intérieure, 14, une partie intérieure, 15, situées de part et d'autre du fond de gorge, 4. La partie intérieure, 14, est celle qui est la plus proche de la zone adhésive, 3. Cette partie intérieure, 14, présente par rapport à la zone adhésive, 3, un angle de moins de 45°.The groove has an inner part, 14, an inner part, 15, located on either side of the throat bottom, 4. The inner part, 14, is that which is the closest to the adhesive area, 3. This inner part, 14, presents by relative to the adhesive area, 3, an angle of less than 45 °.

Pour fixer ce joint, 1, sur une surface à masquer, 40, on peut introduire un doigt, 50, dans la gorge, 2, et presser avec ce doigt, 50, dans la direction de la flèche, F2, tout en déplaçant le doigt, 50, dans le sens de la flèche, F1. On crée ainsi une zone de contact, 51, où la zone adhésive, 3, du joint, 1, vient adhérer sur la surface, 40, à masquer.To fix this joint, 1, on a surface to be masked, 40, one can introduce a finger, 50, into the groove, 2, and press with this finger, 50, in the direction of the arrow, F 2 , while moving the finger, 50, in the direction of the arrow, F 1 . This creates a contact area, 51, where the adhesive area, 3, of the seal, 1, adheres to the surface, 40, to mask.

On peut ainsi très facilement à la fois guider très précisément le joint, par exemple sur les bords d'une surface complexe, et faire adhérer le joint.It is thus very easy both to guide the joint very precisely, by example on the edges of a complex surface, and adhere the joint.

Ce mode de mise en place d'un joint adhésif de masquage s'est révélé très avantageux et des essais ont permis de montrer qu'il est très apprécié des utilisateurs et leur permet à la fois une amélioration du confort lors de la pose et un gain de temps très significatif.This method of fitting a masking adhesive seal has proven to be very advantageous and tests have shown that it is highly appreciated by users and allows them both an improvement in comfort during installation and a very significant time saving.

La figure 2 représente un schéma d'une partie d'un véhicule comprenant des zones à masquer, susceptibles d'être protégées par la méthode selon l'invention. Dans le cas représenté, on cherche à préparer la mise en peinture d'une zone de véhicule comprenant une portière, 110, qui peut se refermer contre la partie fixe de la carrosserie, 100. FIG. 2 represents a diagram of a part of a vehicle comprising areas to be masked, which can be protected by the method according to the invention. In the case shown, we seek to prepare the painting a vehicle zone comprising a door, 110, which can close against the fixed part of the body, 100.

La portière, 110, vient affleurer, quand elle est fermée, au bord extérieur de la feuillure, 101. La carrosserie comprend une zone, 140, représentée avec des traits hachurés qui est masquée quand la portière est fermée. Cette zone est délimitée par un joint, 130, qui permet d'assurer l'étanchéité quand la portière est fermée. Lors de la mise en peinture de cette partie du véhicule, on souhaite éviter que de la peinture pénètre dans la zone, 140. On est ainsi amené à procéder à un masquage par un joint adhésif de masquage, disposé sur la feuillure, 101.The door, 110, is flush, when closed, at the outer edge of the rebate, 101. The body includes an area, 140, shown with hatched lines which is hidden when the door is closed. This area is delimited by a seal, 130, which ensures sealing when the door is closed. When painting this part of the vehicle, you want to avoid that paint gets into the area, 140. We are thus led to carry out a masking by a masking adhesive seal, placed on the rebate, 101.

Les solutions proposées par l'invention sont particulièrement adaptées au masquage de telles zones.The solutions proposed by the invention are particularly suitable for hiding such areas.

La figure 3 représente un schéma de la section, 30, d'un joint adhésif de masquage, 1, selon l'invention à l'état non comprimé. La section du joint, 1, représenté, a sensiblement la forme d'une demi ellipse dans laquelle se trouve la gorge, 2. La section de ce joint s'inscrit dans un parallélépipède de largeur, L, et de hauteur, h. Le joint, 1, comprend deux ailes, 10 et 11, situées de part et d'autre de la gorge, 2. Ces ailes, 10 et 11, ont chacune une partie intérieure, respectivement 14 et 15, située sur la paroi intérieure de la gorge, 2, de part et d'autre du fond de gorge, 4.FIG. 3 represents a diagram of the section, 30, of an adhesive seal of masking, 1, according to the invention in the uncompressed state. The joint section, 1, shown, has substantially the shape of a half ellipse in which the groove, 2. The section of this joint is part of a parallelepiped of width, L, and tall, h. The seal, 1, comprises two wings, 10 and 11, located on either side throat, 2. These wings, 10 and 11, each have an inner part, respectively 14 and 15, located on the inner wall of the groove, 2, on the side and on the other side of the groove, 4.

Les ailes, 10 et 11, ont également chacune une partie externe, respectivement 12 et 13, situées sur le bord externe des ailes 10 et 11. Une zone adhésive, 3, est disposée sous la partie externe, 12, de l'aile, 10. La partie intérieure, 14, de l'aile, 10, fait un angle, ω, avec la zone adhésive, 3, portée par la partie extérieure, 12, de l'aile, 10. L'angle α que fait la partie intérieure, 14, de l'aile, 10, avec un plan parallèle à la zone adhésive, 3, est identique à l'angle ω.The wings, 10 and 11, also each have an external part, 12 and 13 respectively, located on the outer edge of wings 10 and 11. A zone adhesive, 3, is arranged under the external part, 12, of the wing, 10. The part inner, 14, wing, 10, makes an angle, ω, with the adhesive zone, 3, carried by the outer part, 12, of the wing, 10. The angle α made by the inner part, 14, of the wing, 10, with a plane parallel to the adhesive zone, 3, is identical to the angle ω.

L'ouverture de la gorge, 2, est définie par l'angle, α + β, qui correspond à l'angle entre la partie intérieure, 14, de l'aile, 10, et la partie intérieure 15, de l'aile, 11.The opening of the groove, 2, is defined by the angle, α + β, which corresponds to the angle between the inner part, 14, of the wing, 10, and the inner part 15, of the wing, 11.

Le fond, 4, de la gorge, 2, du joint représenté est arrondi et caractérisé par un moyen de courbure, R.The bottom, 4, of the groove, 2, of the joint shown is rounded and characterized by a means of curvature, R.

Dans le cas représenté, les deux ailes ont sensiblement la même longueur et viennent sensiblement affleurer au bord du parallélépipède dans le sens de la hauteur. Cette configuration n'est pas limitative, et l'on peut tout aussi bien utiliser des joints selon l'invention où la longueur d'une aile, 10 ou 11, est sensiblement inférieure à la longueur de l'autre aile, respectivement 11 ou 12. In the case shown, the two wings have substantially the same length and are substantially flush with the edge of the parallelepiped in the direction of the height. This configuration is not limiting, and we can just as easily use seals according to the invention where the length of one wing, 10 or 11, is substantially less than the length of the other wing, 11 or 12 respectively.

Le joint représenté a un bord épais, 20, situé sur le côté de l'aile, 10, opposé au fond, 4, de la gorge, 2. Ce bord, 20, a une épaisseur, e.The seal shown has a thick edge, 20, located on the side of the wing, 10, opposite the bottom, 4, of the groove, 2. This edge, 20, has a thickness, e.

La zone adhésive, 3; est, dans le cas représenté, située sur une partie seulement de la partie extérieure, 12, de l'aile, 10. Elle est située dans une zone éloignée d'une distance, d, du bord externe du parallélépipède dans lequel s'inscrit la section, 30, du joint adhésif de masquage, 1.The adhesive area, 3; is, in the case shown, located on a part only on the outer part, 12, of the wing, 10. It is located in an area distant from a distance, d, from the outer edge of the parallelepiped in which fits the section, 30, of the masking adhesive seal, 1.

Cette distance, d, peut s'exprimer de manière relative à la largeur L, par le paramètre d/L.This distance, d, can be expressed relative to the width L, by the d / L parameter.

Des essais ont été effectués avec des joints adhésifs de masquage dont la géométrie correspond au joint (1) représenté sur cette figure 3.Tests have been carried out with masking adhesive seals whose geometry corresponds to the seal (1) shown in this figure 3.

Les meilleurs résultats, en terme de facilité de pose et d'efficacité de masquage pour la peinture automobile ont été obtenus avec les caractéristiques du joint à l'état non comprimé, mentionnées dans le tableau I. Caractéristiques Plages préférées selon l'invention Plages particulièrement préférées Valeurs préférées L(mm) 5 à 40 10 à 25 18 h (mm) 3 à 40 10 à 25 20 ω = α(°) moins de 45° 10° à 35° 25° α + β(°) 20° à 80° 40° à 70° 55° β - α(°) 0 à 30° 3° à 15° 5° R(mm) 5 à 30 8 à 20 10 d/L (en %) 0 à 90 % 20 à 50 % 33 % The best results in terms of ease of installation and masking efficiency for automotive paint were obtained with the characteristics of the seal in the uncompressed state, mentioned in Table I. Characteristics Preferred beaches according to the invention Particularly preferred beaches Preferred values L (mm) 5 to 40 10 to 25 18 h (mm) 3 to 40 10 to 25 20 ω = α (°) less than 45 ° 10 ° to 35 ° 25 ° α + β (°) 20 ° to 80 ° 40 ° to 70 ° 55 ° β - α (°) 0 to 30 ° 3 ° to 15 ° 5 ° R (mm) 5 to 30 8 to 20 10 d / L (in%) 0 to 90% 20 to 50% 33%

La figure 4 représente un joint adhésif de masquage, 1, selon l'invention après fixation sur une partie fixe d'un véhicule, dans ce cas, non limitatif, le montant d'une portière, 100. Le joint, 1, est collé par la zone adhésive, 3, sur la feuillure, 101, dans la zone, 102, de la feuillure sensiblement perpendiculaire à la surface, 103, à peindre.FIG. 4 represents an adhesive masking seal, 1, according to the invention after fixing to a fixed part of a vehicle, in this case, not limiting, the amount of a door, 100. The seal, 1, is glued by the adhesive zone, 3, on the rebate, 101, in the zone, 102, of the rebate substantially perpendicular to the surface, 103, to be painted.

La figure, 5, représente, en coupe, un joint, 1, disposé préalablement selon la figure 4, après fermeture d'un ouvrant, dans ce cas une portière, 110. Lors de la fermeture de l'ouvrant, le joint 1, s'écrase et vient occuper l'espace entre le montant, 100, et la portière, 110. The figure, 5, represents, in section, a seal, 1, previously arranged according to Figure 4, after closing an opening, in this case a door, 110. During the closing of the opening, the seal 1, crashes and occupies the space between the amount, 100, and door, 110.

On note que l'aile 11, telle que définie en figure 3, s'est écrasée et est venue glisser le long du bord, 14, de l'aile, 10. Ainsi le joint vient occuper une grande partie de la surface de la feuillure, 101, dans la zone, 102. On assure alors une excellente étanchéité à la peinture qui est notamment projetée sur les surfaces extérieures, 103, du montant et, 111, de la portière.Note that the wing 11, as defined in FIG. 3, has crashed and is come to slide along the edge, 14, of the wing, 10. Thus the joint comes to occupy a large part of the rebate surface, 101, in the zone, 102. We then ensure an excellent seal against the paint which is especially sprayed on the exterior surfaces, 103, of the upright and, 111, of the door.

On note également que le joint ainsi disposé s'arrondit dans l'espace extérieur, 120, entre le montant, 100, et la portière, 110. L'arc qu'il forme dans cette zone est favorable à une peinture ultérieure de bonne qualité. En effet on a pu montrer qu'il est préférable (dans ce mode et en général selon l'invention) que le joint ne forme pas de bourrelet sortant vers l'extérieur (en particulier hors du véhicule) dans cette zone, car il en résulterait des défauts de peinture, notamment des ombrages non désirés.We also note that the joint thus arranged rounds in space exterior, 120, between the upright, 100, and the door, 110. The arc it forms in this area is favorable for subsequent painting of good quality. Indeed we have been able to show that it is preferable (in this mode and in general according to the invention) that the seal does not form a bead exiting towards the outside (in particular outside the vehicle) in this area, as this would result in paint defects, in particular unwanted shading.

La figure 6, représente, en coupe, un joint, 1, disposé sur une partie fixe, 200, après fermeture d'un ouvrant, 210. Cette représentation correspond à une observation d'un joint selon l'invention disposé selon le deuxième mode de réalisation préféré de la méthode de peinture décrite ci-dessus. Dans le cas représenté, la partie fixe, 200, est un élément de carrosserie sur lequel vient affleurer un pare-brise, 220. L'ouvrant, 210, est un capot. Le joint, 1, est préalablement disposé de manière à ce que la zone adhésive, 3, soit fixée sur une partie, 201, de la pièce 200, cette partie, 201, étant située sur une surface du côté de la carrosserie en regard avec le moteur du véhicule (non représenté ici). Le joint, 1, est disposé de telle manière que le capot, 210, vient l'ouvrir en appuyant sur l'aile, 11, du joint, 1. On peut préparer le joint, 1, en écartant les deux ailes, 10, 11, l'une par rapport à l'autre, préalablement à la fermeture du capot. Cet écartement peut être obtenu en pressant avec un doigt sur la partie intérieure, 15, de l'aile, 11.FIG. 6 represents, in section, a seal, 1, disposed on a fixed part, 200, after closing an opening, 210. This representation corresponds to a observation of a seal according to the invention arranged according to the second mode of preferred implementation of the painting method described above. In the case shown, the fixed part, 200, is a body element on which comes flush with a windshield, 220. The opening, 210, is a hood. The seal, 1, is previously arranged so that the adhesive area, 3, is fixed on a part, 201, of part 200, this part, 201, being situated on a surface on the side of the bodywork opposite the vehicle engine (not shown here). The seal, 1, is arranged in such a way that the cover, 210, opens it by pressing on the wing, 11, of the joint, 1. We can prepare the joint, 1, by spreading the two wings, 10, 11, one relative to the other, prior to closing the cover. This spacing can be obtained by pressing with a finger on the inner part, 15, wing, 11.

On peut ainsi procéder à la mise en peinture d'une zone du véhicule où la disposition d'un joint suivant le premier mode de réalisation préféré de l'invention est peu adapté, tout en utilisant le même joint pour masquer toutes les parties à protéger du véhicule.It is thus possible to paint an area of the vehicle where the provision of a seal according to the first preferred embodiment of the invention is unsuitable, while using the same seal to hide all the parts to protect from the vehicle.

Des essais ont notamment montré qu'avec ces deux modes de réalisation et avec un joint adhésif de masquage de géométrie et de dimensions définies avec les valeurs préférées du tableau I, on peut étanchéifier de manière très satisfaisante des jeux allant de 3 à 35 mm. La qualité de la peinture après traitement de surface est remarquable et on n'observe pas de trait de peinture marqué ni de zones d'ombrage, mais au contraire un excellent fondu entre les zones du véhicule qui ont été repeintes et les autres.Tests have shown in particular that with these two embodiments and with a masking adhesive of geometry and defined dimensions with the preferred values of table I, it is possible to seal in a very satisfactory clearance from 3 to 35 mm. The quality of the paint after surface treatment is remarkable and there is no paint line marked or shaded areas, but on the contrary an excellent fade between vehicle areas that have been repainted and others.

L'invention ne se limite pas à ces types de réalisation et doit être interprétée de façon non limitative et englobant toute méthode de masquage d'au moins un bord d'une partie d'une surface à traiter consistant à utiliser un joint adhésif de masquage comprenant un matériau cellulaire allongé, résistant à un traitement de surface et au moins une zone adhésive, qui comprend au moins une gorge dont au moins une partie de la paroi présente une zone inclinée d'un angle de moins de 45° par rapport à la zone adhésive, où l'application dudit joint peut s'effectuer en guidant ledit joint par l'insertion d'au moins une partie substantielle d'au moins un doigt d'un opérateur dans la gorge, et où ledit joint adhésif de masquage est appliqué de façon détachable sur au moins une partie du bord de la surface à traiter et est détaché après avoir terminé le traitement.The invention is not limited to these types of embodiments and must be interpreted non-limiting and encompassing any method of masking at least one edge of a part of a surface to be treated consisting in using an adhesive seal of masking comprising an elongated cellular material, resistant to a treatment of surface and at least one adhesive zone, which comprises at least one groove whose at least part of the wall has an inclined area with an angle of less than 45 ° with respect to the adhesive zone, where the application of said seal can be carried out guiding said joint by the insertion of at least a substantial part of at least one operator's finger in the throat, and where said masking adhesive seal is releasably applied to at least part of the edge of the surface to be treat and is detached after completing treatment.

L'invention doit être également interprétée comme englobant tout joint de masquage adapté à cette méthode de masquage.The invention should also be interpreted as encompassing any joint of masking suitable for this masking method.

Claims (20)

Méthode de masquage d'au moins un bord d'une partie d'une surface à traiter consistant à utiliser un joint adhésif de masquage (1) comprenant un matériau cellulaire allongé, résistant à un traitement de surface et au moins une zone adhésive (3), ledit joint adhésif de masquage (1) étant appliqué de façon détachable sur au moins une partie du bord de la surface à traiter et étant détaché après avoir terminé le traitement, caractérisée en ce que le joint adhésif de masquage (1) comprend au moins une gorge (2) dont au moins une partie de la paroi présente une zone inclinée d'un angle, ω, de moins de 45° par rapport à la zone adhésive (3) et en ce que l'application du joint (1) peut s'effectuer en guidant ledit joint (1) par l'insertion d'une partie d'au moins un doigt (50) d'un opérateur dans la gorge (2).Method for masking at least one edge of a part of a surface to be treated, comprising using a masking adhesive joint (1) comprising an elongated cellular material, resistant to a surface treatment and at least one adhesive zone (3 ), said adhesive masking seal (1) being detachably applied to at least part of the edge of the surface to be treated and being detached after having completed the treatment, characterized in that the adhesive masking seal (1) comprises at least at least one groove (2) of which at least part of the wall has an area inclined at an angle, ω, of less than 45 ° relative to the adhesive area (3) and in that the application of the seal (1 ) can be carried out by guiding said seal (1) by inserting part of at least one operator's finger (50) in the groove (2). Méthode de masquage selon la revendication 1, caractérisée en ce que l'application du joint (1) s'effectue en guidant continûment ledit joint (1) à l'aide du ou des doigt(s) d'un opérateur, inséré(s) dans la gorge (2) et en ce que ce (ou ces) doigt(s) effectue(nt) simultanément un déplacement longitudinal dans la gorge (2) et applique(nt) une pression suffisante sur une par tie de la surface de la gorge (2) pour permettre l'adhésion d'au moins une zone adhésive (3) du joint adhésif de masquage (1) sur au moins une partie du bord de la surface à traiter.Masking method according to claim 1, characterized in that the application of the seal (1) is carried out by continuously guiding said seal (1) using the finger (s) of an operator, inserted (s) ) in the groove (2) and in that this (or these) finger (s) simultaneously makes (s) a longitudinal movement in the groove (2) and applies (s) sufficient pressure to a part of the surface of the groove (2) to allow adhesion of at least one adhesive zone (3) of the masking adhesive seal (1) on at least part of the edge of the surface to be treated. Méthode de peinture d'au moins une partie d'un véhicule automobile caractérisée en ce qu'elle comprend une étape de masquage définie dans l'une quelconque des revendications précédentes.Method for painting at least part of a motor vehicle, characterized in that it comprises a masking step defined in any one of the preceding claims. Méthode de peinture selon la revendication 3, caractérisée en ce que le joint adhésif de masquage (1) est appliqué sur une partie (100) du véhicule puis comprimé par une autre partie (110) dudit véhicule.Painting method according to claim 3, characterized in that the masking adhesive seal (1) is applied to one part (100) of the vehicle and then compressed by another part (110) of said vehicle. Méthode de peinture selon la revendication 4, caractérisée en ce que la partie (100) du véhicule sur laquelle le joint adhésif de masquage (1) est appliqué est une partie fixe du véhicule, notamment de la carrosserie du véhicule et en ce que l'autre partie (110) qui vient comprimer ledit joint (1) est une partie mobile du véhicule.Painting method according to claim 4, characterized in that the part (100) of the vehicle to which the masking adhesive seal (1) is applied is a fixed part of the vehicle, in particular of the vehicle body and in that the another part (110) which compresses said seal (1) is a movable part of the vehicle. Méthode de peinture selon la revendication 3, caractérisée en ce que le joint adhésif de masquage est appliqué sur une partie (200) du véhicule, notamment une partie fixe, notamment la carrosserie, et est ouvert par écartement des côtés d'au moins une gorge (2) par une seconde partie (210) du véhicule. Painting method according to claim 3, characterized in that the masking adhesive seal is applied to a part (200) of the vehicle, in particular a fixed part, in particular the bodywork, and is opened by spacing the sides of at least one groove (2) by a second part (210) of the vehicle. Méthode de peinture selon l'une des revendications 5 ou 6 caractérisée en ce qu'un même joint de masquage (1) peut être utilisé pour masquer un espace entre la carrosserie (100) et un ouvrant (110, 210) du véhicule, quelque soit l'ouvrant (110, 210) du véhicule.Painting method according to one of Claims 5 or 6, characterized in that the same masking joint (1) can be used to mask a space between the bodywork (100) and an opening (110, 210) of the vehicle, whatever or the opening (110, 210) of the vehicle. Joint adhésif de masquage (1) destiné à être utilisé pour la mise en oeuvre de la méthode de masquage selon l'une des revendications 1 à 2 ou de la méthode de peinture selon l'une des revendications 3 à 7.Masking adhesive seal (1) intended to be used for setting work of the masking method according to one of claims 1 to 2 or of the painting method according to one of claims 3 to 7. Joint adhésif de masquage (1) selon la revendication 8, caractérisé en ce qu'il comprend une unique gorge de guidage (2) et deux ailes (10, 11) situées de part et d'autre de la gorge, chaque aile ayant une partie intérieure (respectivement 14, 15) du côté de la gorge, et une partie extérieure (respectivement 12, 13) située sur la face de l'aile opposée à la gorge, avec sur au moins l'une des ailes (10, 11) au moins une zone adhésive (3) située sur la partie extérieure (12) de ladite aile (10).Masking adhesive joint (1) according to claim 8, characterized in that it comprises a single guide groove (2) and two wings (10, 11) situated on either side of the groove, each wing having a inner part (respectively 14, 15) on the side of the groove, and an outer part (respectively 12, 13) located on the face of the wing opposite the groove, with on at least one of the wings (10, 11 ) at least one adhesive zone (3) located on the outer part (12) of said wing (10). Joint adhésif de masquage (1) selon l'une des revendications 8 ou 9, caractérisé en ce que la section (30) dudit joint s'inscrit dans un parallélépipède de 5 à 40 mm de côté, L, notamment de 10 à 25 mm de côté, et de 3 à 40 mm de hauteur, notamment de 10 à 25 mm de hauteur, h, à l'état non comprimé du joint, et en ce que ledit joint est susceptible d'être comprimé au moins de la moitié dans la hauteur.Masking adhesive joint (1) according to one of claims 8 or 9, characterized in that the section (30) of said joint is inscribed in a parallelepiped from 5 to 40 mm in side, L, in particular from 10 to 25 mm sideways, and from 3 to 40 mm in height, in particular from 10 to 25 mm in height, h, in the uncompressed state of the joint, and in that said joint is capable of being compressed at least by half in the height. Joint adhésif de masquage (1) selon l'une quelconque des revendications 9 ou 10, caractérisé en ce que la gorge est une gorge en V avec un fond (4) de gorge arrondi et que la partie intérieure (14) de l'aile (10) située entre la gorge et une zone adhésive et la partie intérieure (15) de l'aile (11) située de l'autre côté de la gorge font un angle, α + β, compris entre 20 et 80°, notamment plus de 40°, et de préférence moins de 70°, quand le joint n'est pas comprimé.Masking adhesive joint (1) according to any one of claims 9 or 10, characterized in that the groove is a V-shaped groove with a rounded groove bottom (4) and that the inner part (14) of the wing (10) located between the groove and an adhesive zone and the inner part (15) of the wing (11) located on the other side of the groove make an angle, α + β, between 20 and 80 °, in particular more than 40 °, and preferably less than 70 °, when the joint is not compressed. Joint adhésif de masquage (1) selon la revendication 11, caractérisé en ce que le fond de gorge (4) a un rayon de courbure, R, compris entre 5 et 30 mm, de préférence plus de 8 mm et notamment moins de 20 mm, quand le joint n'est pas comprimé.Masking adhesive joint (1) according to claim 11, characterized in that the bottom of the groove (4) has a radius of curvature, R, of between 5 and 30 mm, preferably more than 8 mm and in particular less than 20 mm , when the joint is not compressed. Joint adhésif de masquage (1) selon l'une quelconque des revendications 9 à 12, caractérisé en ce que la zone adhésive (3) de l'aile (10) située entre la gorge et une zone adhésive présente une surface plane et en ce que l'angle, α, de cette surface avec la partie intérieure (14) de cette même aile (10) est inférieur à l'angle, β, que fait la paroi intérieure (15) de l'autre aile (11) avec la même surface plane de la zone adhésive (3), quand le joint n'est pas comprimé.Masking adhesive joint (1) according to any one of Claims 9 to 12, characterized in that the adhesive zone (3) of the wing (10) situated between the groove and an adhesive zone has a flat surface and in that that the angle, α, of this surface with the inner part (14) of this same wing (10) is less than the angle, β, made by the inner wall (15) of the other wing (11) with the same flat surface of the adhesive zone (3), when the joint is not compressed. Joint adhésif de masquage (1) selon la revendication 13, caractérisé en ce que β est supérieur à α de 3° à 30°, de préférence de plus de 5° et notamment de moins de 15°.Masking adhesive joint (1) according to claim 13, characterized in that β is greater than α by 3 ° to 30 °, preferably more than 5 ° and in particular less than 15 °. Joint adhésif de masquage (1) selon l'une des revendications 9 à 14, caractérisé en ce que, quand le joint est comprimé, l'aile (11) déborde par rapport à l'aile (10) sur laquelle est située au moins une zone adhésive (3).Masking adhesive joint (1) according to one of claims 9 to 14, characterized in that, when the joint is compressed, the wing (11) projects beyond the wing (10) on which is located at least an adhesive zone (3). Joint adhésif de masquage (1) selon l'une quelconque des revendications 9 à 15, caractérisé en ce que l'aile (10) sur laquelle est située au moins une zone adhésive (3) comprend un bord (20) situé du côté de l'aile (10) opposé au fond (4) de la gorge (2) permettant de bloquer le déplacement de l'aile (11) quand on comprime le joint, l'épaisseur du bord (20), e, est notamment comprise entre 1 et 10 mm, de préférence 2 à 5 mm, quand le joint n'est pas comprimé.Masking adhesive joint (1) according to any one of Claims 9 to 15, characterized in that the wing (10) on which is located at least one adhesive zone (3) comprises an edge (20) situated on the side of the wing (10) opposite the bottom (4) of the groove (2) making it possible to block the movement of the wing (11) when the seal is compressed, the thickness of the edge (20), e, is notably understood between 1 and 10 mm, preferably 2 to 5 mm, when the joint is not compressed. Joint adhésif de masquage (1) selon l'une quelconque des revendications 9 à 16, caractérisé en ce qu'il comprend une seule zone adhésive (3) située sur la partie extérieure (12) de l'aile (10) et en ce que ladite zone adhésive (3) est disposée de manière dissymétrique sur la partie extérieure (12) de l'aile (10) et majoritairement sur la partie extérieure (12) de l'aile (10) proche du bord (20) de l'aile (10), notamment disposée sensiblement sur les deux tiers de la surface de la partie extérieure (12) de l'aile (10) en partant du bord (20).Masking adhesive joint (1) according to any one of Claims 9 to 16, characterized in that it comprises a single adhesive zone (3) situated on the external part (12) of the wing (10) and in that that said adhesive zone (3) is arranged asymmetrically on the outer part (12) of the wing (10) and mainly on the outer part (12) of the wing (10) close to the edge (20) of the 'wing (10), in particular arranged substantially on two thirds of the surface of the outer part (12) of the wing (10) from the edge (20). Joint adhésif de masquage (1) selon l'une quelconque des revendications 8 à 17, caractérisé en ce que le matériau cellulaire allongé est une mousse de polyuréthanne, notamment à base de polyester.Masking adhesive joint (1) according to any one of Claims 8 to 17, characterized in that the elongated cellular material is a polyurethane foam, in particular based on polyester. Procédé de fabrication du joint adhésif de masquage selon l'une des revendications 8 à 18, caractérisé en ce qu'il comprend au moins les étapes suivantes : fabrication de blocs de matériau cellulaire par expansion contrôlée ; découpe dans les blocs de bandes de matériau cellulaire ; usinage des bandes de matériau cellulaire par meulage et/ou découpe et/ou déformation à chaud pour obtenir la forme du joint adhésif de masquage (1) ; dépose d'adhésif repositionnable et/ou d'au moins une bande adhésive sur au moins une partie des bandes de matériau cellulaire usinées pour former au moins une zone adhésive (3). Method for manufacturing the masking adhesive joint according to one of Claims 8 to 18, characterized in that it comprises at least the following steps: manufacture of blocks of cellular material by controlled expansion; cutting from the blocks of strips of cellular material; machining the strips of cellular material by grinding and / or cutting and / or hot deformation to obtain the shape of the adhesive masking seal (1); depositing repositionable adhesive and / or at least one adhesive strip on at least part of the strips of cellular material machined to form at least one adhesive zone (3). Procédé de fabrication selon la revendication 19, caractérisé en ce qu'il comprend en outre au moins l'une des étapes optionnelles suivantes : dépoussiérage par soufflage et/ou brossage et/ou aspiration ; dépose d'un produit de fixation des poussières ; raboutage de bandes entre elles, notamment par collage et/ou soudure ; enroulement d'au moins une bande de joint adhésif de masquage (1) sur au moins un tambour pour faciliter le conditionnement ; conditionnement d'au moins une bande de joint adhésif de masquage (1) dans une boite en carton parallélépipédique. Manufacturing method according to claim 19, characterized in that it further comprises at least one of the following optional steps: dusting by blowing and / or brushing and / or vacuuming; depositing a dust fixing product; joining bands together, in particular by gluing and / or welding; winding of at least one strip of masking adhesive seal (1) on at least one drum to facilitate packaging; packaging of at least one strip of masking adhesive seal (1) in a rectangular cardboard box.
EP02290211A 2001-02-07 2002-01-30 Masking method, masking gasket and production method thereof Withdrawn EP1230985A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0101625 2001-02-07
FR0101625A FR2820347B1 (en) 2001-02-07 2001-02-07 MASKING METHOD, MASKING JOINT SUITABLE FOR THE METHOD AND MANUFACTURING METHOD OF SAID JOINT

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US (3) US20020160115A1 (en)
EP (1) EP1230985A1 (en)
CZ (1) CZ2002479A3 (en)
FR (1) FR2820347B1 (en)
HU (1) HUP0200443A2 (en)
NO (1) NO20020568L (en)
RU (1) RU2283703C2 (en)
SK (1) SK1932002A3 (en)

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FR2820347B1 (en) * 2001-02-07 2003-11-14 Saint Gobain Abrasif MASKING METHOD, MASKING JOINT SUITABLE FOR THE METHOD AND MANUFACTURING METHOD OF SAID JOINT
TWI458557B (en) * 2009-11-26 2014-11-01 Hon Hai Prec Ind Co Ltd Spray-paint shielding device and the method using the same
ES1139131Y (en) * 2015-04-29 2015-08-10 Bossauto Innova S A BURLETE FOR BODIES
CZ306604B6 (en) * 2015-10-06 2017-03-22 Univerzita Tomáše Bati ve Zlíně A method of producing a shielding mask for covering the unprocessed parts of products
US10717105B1 (en) * 2019-08-15 2020-07-21 Tns Solutions Masking strip for use in painting vehicles
FR3138620A1 (en) * 2022-08-04 2024-02-09 Mon Peintre Expert Reusable plastic saver to mask surfaces before a painting operation

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GB494712A (en) * 1937-05-01 1938-10-31 Thomas Punshon Improved method and means of rendering buildings and rooms proof against the ingress of toxic gases
CH640303A5 (en) * 1980-12-19 1983-12-30 Paul Borel Sealing strip for doors and windows
US5540880A (en) * 1987-08-12 1996-07-30 Nagoya Oil Chemical Co., Ltd. Corrosion, sound, and vibration-proof method for metal structure
EP0365510B1 (en) 1988-09-22 1994-07-27 Jean Silvestre Use of a masking means and masking means
GB2223425A (en) * 1988-10-05 1990-04-11 Donald Murray Western Filling gaps
EP0384626B1 (en) 1989-02-20 1995-04-26 Minnesota Mining And Manufacturing Company Shaped foam
DE29601846U1 (en) * 1996-02-03 1996-03-14 Future Product Entwicklungs Un Masking profile for painting work, especially for car bodies

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US20040234691A1 (en) 2004-11-25
NO20020568D0 (en) 2002-02-05
FR2820347B1 (en) 2003-11-14
US20020160115A1 (en) 2002-10-31
NO20020568L (en) 2002-08-08
HUP0200443A2 (en) 2003-03-28
SK1932002A3 (en) 2002-11-06
US20070048515A1 (en) 2007-03-01
US7153545B2 (en) 2006-12-26
FR2820347A1 (en) 2002-08-09
CZ2002479A3 (en) 2002-09-11
HU0200443D0 (en) 2002-04-29
RU2283703C2 (en) 2006-09-20

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