JP2006218337A - Coating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating method capable of preventing not only the occurrence of the turbulent flow caused by the mutual interference of the end parts of respective coating patterns sprayed on and applied to a coating surface from respective adjacent nozzles but also the occurrence of air biting on the coating surface in a case that a coating agent is sprayed on and applied to the coating surface using a plurality of the nozzles. <P>SOLUTION: The nozzles 1a and 1c are positioned on almost the same straight line along the direction crossing a coating direction A at a right angle and the nozzles 1b and 1d are positioned on almost the same straight line along the direction crossing the coating direction A at the right angle on the slightly rear side of the nozzles 1a and 1c. The adjacent nozzles are positionally shifted to each other to prevent not only the occurrence of the turbulent flow caused by the mutual interference of the adjacent end parts of the respective coating patterns 3a, 3b, 3c and 3d but also the occurrence of air biting. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a coating method, and more particularly to a coating method in which spray coating is performed using a plurality of nozzles.

  In order to prevent dirt, scratches, dents and other injuries on the painted surface of the car body when transporting completed vehicles from factories to dealers throughout the country by trailer or when transporting them overseas by ship The protective film-forming raw material liquid (coating agent) is spray-coated on the painted surface of the vehicle body to form a substantially transparent thin-film protective film. Then, after the automobile is transported (carried) to a predetermined place, the protective film formed on the surface of the vehicle body is removed by peeling off the seal.

  In the case of applying a coating agent such as a protective film forming raw material liquid for forming the above-described protective film to a coating surface of a vehicle body or the like, conventionally, a plurality of coatings arranged at predetermined intervals in a row so as to be generally orthogonal to the coating direction. Nozzles are used (for example, refer to Patent Document 1).

In the conventional case such as the above-mentioned Patent Document 1, generally, as shown in FIGS. 3 (a), 3 (b) and 3 (c), the application direction (from top to bottom in FIGS. 3 (a) and 3 (c)). Direction) A plurality of (four in the figure) nozzles 11a, 11b, 11c, and 11d are arranged in a row on the connecting plate 10 so as to be orthogonal to A, and the nozzles 11a, 11b, 11c, and 11d are arranged at regular intervals. When the application surface 13 is applied with each of the application patterns 12a, 12b, 12c, and 12d by spray application, the adjacent patterns are arranged so that there is no application leakage in the application surface 13 in the direction orthogonal to the application direction A. It is applied so that it overlaps a little (shaded area). FIG. 3A is a view of the nozzles 11a, 11b, 11c, and 11d as viewed from above. The slit-like liquid discharge portions (not shown) are provided on the lower surface side of the connecting plate 10 (relative to the paper surface). It is located on the back side.
JP-A-6-114326 (FIGS. 2, 4, and 5)

  By the way, in the case of the arrangement of the nozzles 11a, 11b, 11c, and 11d as shown in FIGS. 3A, 3B, and 3C, application is performed so that the adjacent application patterns slightly overlap each other. As a result, the overlapping portions of adjacent coating patterns (shaded portions in FIGS. 3B and 3C) interfere with each other to generate turbulent flow. When this turbulent flow occurs, a part of the coating agent floats around and scatters, resulting in a coating failure on the coating surface 13 or air mixing into the coating surface 13 to generate a so-called air bite.

  Further, as shown in FIGS. 4A, 4B, and 4C, the intervals between the nozzles 11a, 11b, 11c, and 11d arranged in a horizontal row are slightly widened, and the coating patterns 12a, 12b, and 12c are formed. Even when the application surface 13 is applied so that adjacent application patterns 12d do not overlap, air (arrows A1 and A2 in FIG. 4B) intersects in the vicinity of the application pattern adjacent to the application surface 13. Similarly, a turbulent flow is generated, and a part of the coating agent floats around and scatters around the coating surface 13, resulting in a coating failure on the coating surface 13.

  Therefore, the present invention prevents the occurrence of turbulent flow due to interference between the ends of the coating pattern sprayed onto the coating surface from adjacent nozzles when the coating agent is spray coated onto the coating surface using a plurality of nozzles. Furthermore, it aims at providing the application | coating method which can prevent generation | occurrence | production of the air bite on an application | coating surface.

  In order to achieve the above object, the present invention discharges a coating agent from a plurality of nozzles arranged at predetermined intervals so as to intersect with the coating direction, and each nozzle and the coating surface An application method in which spray application is performed on the application surface by relative movement, wherein an interval in a direction orthogonal to an application direction between adjacent nozzles of the plurality of nozzles is adjusted, and an application direction of the adjacent nozzles is adjusted. The end portions of the adjacent application patterns are shifted so that the ends of the adjacent application patterns formed on the application surface are not overlapped by the coating agent discharged from the adjacent nozzles. Spray application so that they are shifted from each other with respect to the application direction, and the ends of the adjacent application patterns are substantially positioned on the same line along the application direction. It is characterized in Rukoto.

  The coating film formed on the coated surface by spray coating of the coating agent is a protective film that can be peeled off from the coated surface after coating.

  (Operation) According to the present invention, the positions of the adjacent nozzles are shifted with respect to the application direction so that the ends of the application patterns applied from the adjacent nozzles do not overlap each other. The end of each application pattern applied from each nozzle is prevented from interfering with each other to prevent turbulent flow, and the occurrence of air pockets is also prevented, so that a coating with a substantially uniform thickness can be applied. Can be formed on the surface.

  As described above, according to the coating method according to the present invention, while adjusting the interval in the direction orthogonal to the application direction between adjacent nozzles of a plurality of nozzles, and shifting the position of the adjacent nozzles in the application direction, The end portions of the adjacent application patterns formed on the application surface by the coating agent discharged from the adjacent nozzles do not overlap with each other, and the end portions of the adjacent application patterns are shifted with respect to the application direction. In addition, by spray coating so that the ends of adjacent coating patterns are positioned substantially on the same line along the coating direction, adjacent ends of the coating patterns interfere with each other to generate turbulence. Occurrence is prevented, and generation of air pockets is also prevented, so that a coating having a substantially uniform thickness can be formed on the coated surface as a whole.

  In addition, when the coating formed on the coating surface by spray coating is a protective film that can be peeled off from the coating surface after coating, the occurrence of turbulence at the adjacent ends of each coating pattern By preventing the generation of the protective film, the protective film is coated on the coated surface with a substantially uniform thickness, so that the protective film can be easily peeled off without being broken.

Hereinafter, the present invention will be described based on the illustrated embodiments.
<Embodiment 1>
1A is a schematic plan view showing a nozzle that performs spray coating by the coating method according to Embodiment 1 of the present invention, FIG. 1B is a schematic side view thereof, and FIG. 1C is a coating pattern. FIG.

  In the present embodiment, a plurality (four in the figure) of nozzles 1a, 1b, 1c, and 1d are installed on the connecting plate 2, and a supply line that supplies a high-viscosity protective film forming raw material liquid as a coating agent (not shown). It is connected to a supply pump (not shown) or the like via an illustration. 1A is a view of the nozzles 1a, 1b, 1c, and 1d as viewed from above, and the slit-like liquid discharge portions (not shown) are provided on the lower surface side of the connecting plate 2 (with respect to the paper surface). It is located on the back side.

  The nozzles 1a, 1b, 1c, and 1d are arranged at equal intervals along a direction orthogonal to the application direction (from the top to the bottom in FIGS. 1A and 1C) A, and the nozzle 1a. 1c is located on substantially the same straight line along the direction orthogonal to the application direction A, and the nozzles 1b and 1d are along the direction orthogonal to the application direction A slightly behind the nozzles 1a and 1c. Are located on substantially the same straight line. Further, the nozzles 1a, 1b, 1c, and 1d are equally spaced at positions where adjacent coating patterns of the coating patterns 3a, 3b, 3c, and 3d to be applied are substantially in contact with each other on a straight line along the coating direction A. Is arranged in.

  Next, the coating method according to this embodiment will be described.

  Above the vehicle body surface 4 that is the application surface, the connecting plate 2 provided with the nozzles 1a, 1b, 1c, and 1d arranged alternately with respect to the application direction A as described above is arranged, A supply pump (not shown) or the like is operated to supply a high-viscosity protective film forming raw material liquid as a coating agent to the nozzles 1a, 1b, 1c, and 1d.

  Then, while moving the connecting plate 2 including the nozzles 1a, 1b, 1c, and 1d in the coating direction A at a constant speed, the slit-shaped liquid ejection portions (not shown) of the nozzles 1a, 1b, 1c, and 1d. By discharging the protective film forming raw material liquid from the above, spray coating is performed on the vehicle body surface 4 with each of the coating patterns 3a, 3b, 3c, and 3d to form a protective film.

  At this time, the nozzles 1a and 1c are located on substantially the same straight line along the direction orthogonal to the coating direction A, and the nozzles 1b and 1d are slightly behind the nozzles 1a and 1c with respect to the coating direction A. As shown in FIG. 1C, the application patterns 3a, 3b, 3c, and 3d are adjacent to each other because the positions of adjacent nozzles that are located on substantially the same straight line along the orthogonal direction are shifted. By preventing the end portions from interfering with each other and generating a turbulent flow, and also preventing the occurrence of air pockets, the application patterns 3a, 3b, 3c, and 3d of the nozzles 1a, 1b, 1c, and 1d are prevented. It is sprayed well without overlapping each end.

Therefore, the protective film formed on the vehicle body surface 4 by spray application from the nozzles 1a, 1b, 1c, and 1d is satisfactorily applied with a substantially uniform thickness along the application direction A. The protective film applied to the vehicle body surface 4 can be smoothly peeled off by removing the seal from the end after the automobile is transported (transported) to a predetermined place.
<Embodiment 2>
2A is a schematic plan view showing a nozzle that performs spray coating by the coating method according to Embodiment 2 of the present invention, FIG. 2B is a schematic side view thereof, and FIG. 2C is a coating pattern. FIG. In addition, the same code | symbol is attached | subjected to the member which has the same function as Embodiment 1 shown to Fig.1 (a), (b), (c), and the overlapping description is abbreviate | omitted. 2A is a view of the nozzles 1a, 1b, 1c, and 1d as viewed from above, and each of the slit-like liquid ejection portions (not shown) is provided on the lower surface side of the connecting plate 2 (with respect to the paper surface). It is located on the back side.

  In the present embodiment, a plurality (four in the figure) of nozzles 1a, 1b, 1c, and 1d installed on the connecting plate 2 are applied in the coating direction (from top to bottom in FIGS. 2A and 2C) A. The nozzles 1a, 1b, 1c, and 1d are positioned on a diagonal line with respect to the coating direction A (the nozzle 1a is positioned with respect to the coating direction A). The most advanced side, the nozzle 1d is the rearmost end side with respect to the coating direction A). Further, the nozzles 1a, 1b, 1c, and 1d are equally spaced at positions where adjacent coating patterns of the coating patterns 3a, 3b, 3c, and 3d to be applied are substantially in contact with each other on a straight line along the coating direction A. Is arranged in.

  Next, the coating method according to this embodiment will be described.

  A connecting plate 2 having nozzles 1a, 1b, 1c, and 1d arranged in a position shifted with respect to the coating direction A as described above is disposed above the vehicle body surface 4 that is the coating surface, and a supply pump (Not shown) or the like is operated to supply a high-viscosity protective film forming raw material liquid as a coating agent to the nozzles 1a, 1b, 1c, and 1d.

  Then, while moving the connecting plate 2 including the nozzles 1a, 1b, 1c, and 1d in the coating direction A at a constant speed, the slit-shaped liquid ejection portions (not shown) of the nozzles 1a, 1b, 1c, and 1d. By discharging the protective film forming raw material liquid from the above, spray coating is performed on the vehicle body surface 4 with each of the coating patterns 3a, 3b, 3c, and 3d to form a protective film.

  At this time, since the nozzles 1a, 1b, 1c, and 1d are positioned on an oblique straight line with respect to the coating direction A and the positions of the adjacent nozzles are shifted, as shown in FIG. Adjacent ends of the patterns 3a, 3b, 3c, and 3d are prevented from interfering with each other, and turbulent flow is prevented, and generation of air pockets is also prevented, thereby preventing the nozzles 1a, 1b, 1c, and 1d. The respective coating patterns 3a, 3b, 3c, and 3d are spray coated satisfactorily without overlapping each other.

  Therefore, the protective film formed on the vehicle body surface 4 by spray application from the nozzles 1a, 1b, 1c, and 1d is satisfactorily applied with a substantially uniform thickness along the application direction A. The protective film applied to the vehicle body surface 4 can be smoothly peeled off by removing the seal from the end after the automobile is transported (transported) to a predetermined place.

  Further, in each of the above-described embodiments, the configuration includes four nozzles. However, the present invention can be similarly applied to the case where the number of nozzles is two, three, or five or more. .

  In each of the above-described embodiments, the protective film forming raw material liquid for the protective film for the vehicle body surface is used as the coating agent. However, the present invention is similarly applied to the case where other coating agents are used. be able to.

(A) is a schematic plan view which shows the nozzle which performs spray application with the application | coating method which concerns on Embodiment 1 of this invention, (b) is the schematic side view, (c) is a figure which shows an application pattern. (A) is a schematic plan view which shows the nozzle which performs spray application with the application | coating method which concerns on Embodiment 2 of this invention, (b) is the schematic side view, (c) is a figure which shows an application pattern. (A) is a schematic plan view which shows the nozzle which performs spray application with the application | coating method in a prior art example, (b) is the schematic side view, (c) is a figure which shows an application pattern. (A) is a schematic plan view which shows the nozzle which performs spray application with the application | coating method in another prior art example, (b) is the schematic side view, (c) is a figure which shows an application pattern.

Explanation of symbols

1a, 1b, 1c, 1d Nozzle 2 Connecting plate 3a, 3b, 3c, 3d Coating pattern 4 Body surface

Claims (2)

A coating agent is discharged toward a coating surface from a plurality of nozzles arranged at predetermined intervals so as to cross the coating direction, and spray coating is performed on the coating surface by relative movement between the nozzles and the coating surface. Application method
By adjusting the interval in the direction perpendicular to the application direction between the adjacent nozzles of the plurality of nozzles, and by shifting the position of the adjacent nozzles in the application direction, the application agent discharged from the adjacent nozzles The end portions of the adjacent application patterns formed on the application surface do not overlap with each other, the end portions of the adjacent application patterns are shifted with respect to the application direction, and each of the adjacent application patterns Spray application so that the ends of the pattern are substantially located on the same line along the application direction,
The coating method characterized by the above-mentioned. The film formed on the coated surface by spray coating of the coating agent is a protective film that can be peeled off from the coated surface after coating.
The coating method according to claim 1.

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