JPH0564764A - Spray painting method - Google Patents

Abstract

PURPOSE:To form a uniform coating surface while enhancing painting efficiency by reducing the scattering of paint even when an additional means such as a blocking member limiting a painting range is not especially provided. CONSTITUTION:In applying spray painting to the end part of an object to be painted, the distance LB between a paint spray orifice 6 and a surface 41 to be painted at the end part 31 is made shorter than the distance LA between the paint spray orifice 6 and a surface 42 to be painted at the part 32 other than the end part 31 and the moving speed of a spray gun 1 at the end part 31 is made faster than that at the part 32 other than the end part 31 to paint the end part 31 and, thereafter, the paint spray orifice 6 is moved toward the central part of the object to be painted in the lateral direction and the distance between the paint spray orifice and the surface to be painted and the moving speed of the spray gun are returned to the distance between the paint spray orifice 6 and the surface 42 to be painted and the moving speed of the spray gun 1 at the part 32 other than the end part 31 respectively, to apply lap- painting to the end part 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray coating method for spray coating a unit outer wall of an industrialized house.

[0002]

2. Description of the Related Art As a spray coating facility using a robot used in a spray coating method, a spray gun 1 is attached to the tip of an arm of a robot 2 as shown in FIG. 2, the spray gun 1 against the coated surface 4 of the unit outer wall 3
The coating surface 4 of the unit outer wall 3 is painted by spraying paint from the above. Reference numeral 13 is a spray pattern of the paint sprayed from the spray gun 1.

In the conventional coating method using such equipment, as shown in FIG. 5, the distance L between the coating spray port 6 of the spray gun 1 and the coating surface 4 and the feed pitch P in the width direction of the spray gun 1 are set. Assuming that the spray gun 1 is moved in the direction of the arrow, the coating surface 4 of the unit outer wall 3 is overcoated. 7 is a coating thickness pattern of the paint.

The paint spray port 6 and the painted surface 4 of the spray gun 1
If the distance L is shorter than this, coating defects such as craters will occur. Therefore, the coating surface was coated with the distance L kept constant, and the coating was not performed below the distance L.

Thus, the paint spray port 6 of the spray gun 1
Since the coating surface 4 of the unit outer wall 3 is overcoated with a constant distance L between the coating surface 4 and the coating surface 4, the paint in the shaded portion 8 will scatter at the end of the unit outer wall 3 to improve the coating efficiency. Improvement was hindered.

In order to prevent the scattering of the paint, and thus to prevent the paint from adhering to the non-painted surface, a blocking member and a blocking member are provided which are equipped with a coating reservoir to block a part of the sprayed paint and limit the coating range. And an air ejection part that ejects air along
Japanese Patent Application Laid-Open No. 1-23722 discloses a method of limiting the scattering of paint by providing it at the tip of a painting robot near a spray gun.

[0007]

However, in this conventional method, the addition means such as a blocking member for limiting the coating range is used as a means for preventing the paint from scattering and improving the coating efficiency. However, there was a drawback that it was expensive to add.

In view of the above points, the present invention reduces the scattering of the paint, improves the coating efficiency, and provides a uniform coating surface without providing any additional means such as a blocking member for limiting the coating range. It is an object to provide a spray coating method that can be formed.

[0009]

According to the present invention, when spray coating is applied to the end of an object to be coated, the distance between the paint spray port of the spray gun and the coating surface at the end is set to a value other than the end. Shorter than the distance between the gun's paint spray port and the painted surface, and make the amount of paint sprayed at the end smaller than the amount of paint sprayed at other than the end, speed up the spray gun, or spray the paint. After painting the end part by decreasing the amount and increasing the moving speed, the paint spray port of the spray gun is moved in the width direction toward the center of the object to be painted, and the paint spray port of the spray gun is also moved. The distance between the spray gun and the paint surface and the moving speed of the spray gun to the distance between the paint spray port of the spray gun other than the end and the paint surface, and the moving speed of the spray gun. Features A.

The spray coating apparatus used in the present invention is not different from the apparatus shown in FIG. 4, but the spray gun is automatically operated so that it can be moved toward and away from the coating surface of the object to be coated. It is supposed to be.

[0011]

[Function] The distance between the paint spray port and the painting surface at the end is made shorter than the distance between the paint spray port and the painting surface at the part other than the end, and the paint spray amount at the end is other than the end. The amount of paint sprayed on the end is to be smaller than that of the spray gun, the movement speed of the spray gun is to be increased, or the spray speed is to be reduced and the movement speed is increased. A small amount of paint needs to be applied, which results in less paint splattering.

Further, since the end portion is painted with the distance shorter than the distance between the paint spray port and the painted surface, craters and the like on the painted surface caused by a poor spray state or the like move the spray gun after the end portion is painted. It can be eliminated by applying multiple coatings to the ends.

[0013]

Embodiments will be described below with reference to the embodiments of the drawings. The spray coating equipment used in the spray coating method of the present invention is not particularly different from the conventional spray coating equipment shown in FIG. 4, and the coating surface 4 of the unit outer wall 3 is formed by the spray gun 1 attached to the tip of the arm of the robot 2. Is painted.

FIG. 1 is an explanatory view of an embodiment of the spray coating method of the present invention, and FIG. 2 is an explanatory view showing the movement path of the spray gun of the embodiment of FIG. In FIG. 1, 1 is a spray gun, 6 is a paint spray port, 3 is a unit outer wall, 31 is an end portion of the unit outer wall 3, 32 is a portion other than the end portion of the unit outer wall 3, 41 is a coating surface of the end portion 31, 42 is a coated surface of the portion 32 other than the end portion.

LA is a portion 3 other than the end portion of the unit outer wall 3.
2 is the distance between the paint spray port 6 and the painting surface 42, LB is the distance between the paint spray port 6 and the painting surface 41 when painting the end 31 of the unit outer wall 3, and the distance LB is the distance LA. It is considered to be a shorter distance.

It is desirable that LA be the distance between the paint spray port normally used and the painted surface. The distance between the paint spray port of this commonly used spray gun and the coated surface is the same as the paint spray port of the spray gun and the coated surface under standard working conditions, where craters do not occur and a good uniform coated surface is obtained. It is considered as a distance. In this embodiment, LA = 400 mm, LB = 20
It is set to 0 mm.

P is a spray gun 1 at a portion 32 other than the end portion.
Pitch for sending the paint in the width direction, PA for the paint spray port 6 is LB
It is the feed distance in the width direction when returning from the position of to the position of LA. The feed pitch P is 1/2 of the width of the spray pattern 9 at the portion 32 other than the end portion, and the feed distance PA is 1/2 of the width of the spray pattern 5 at the end portion 31. LA =
When 400 mm and LB = 200 mm, P and PA are P = 320 mm and PA = 150 mm.

Numeral 10 is a one-stroke coating thickness pattern at a distance LB on the coated surface 41 of the end portion 31, and 11 is a distance 1 on the coated surface 42 of the portion 32 other than the end portion.
It is a stroke application thickness pattern.

Next, the spray coating method of this embodiment will be described. First, the paint spray port 6 of the spray gun 1 is located at a distance LB from the coating surface 41 of the end portion 31 (A
Position), the end 31 of the outer wall 3 of the unit, the spray gun 1 in the X direction of FIG.
Faster than the moving speed of (in this embodiment, twice the speed)
Paint while moving. The amount of paint sprayed from the spray gun 1 is the same as that at the distance LA.
At this time, the coating thickness pattern 10 is formed on the coated surface 41.

Next, the paint spray port 6 is moved in the width direction by a distance of PA, and the distance between the paint surface 41 and the paint spray port 6 is set so that the paint surface 42 of the part 32 other than the end portion and the paint spray port 6 are separated from each other. Returning to the distance LA (position B), the coating surface 41 of the end 31 is moved at a speed slower than the moving speed of the spray gun 1 at the distance LB in the X direction of FIG. In this embodiment, the coating is repeated while moving at a speed of 1/2. The amount of paint sprayed from the spray gun 1 is the same as that at the distance LB.

Next, the paint spray port 6 is moved in the width direction by a distance P (position C) while keeping the distance between the coating surface and the paint spray port constant LA, except for the end of the unit outer wall 3. The portion 32 is coated while the spray gun 1 is moved in the X direction at the same spray amount and the same moving speed.

In the same manner as described below, D, as indicated by arrows in the figure,
The coating material spray port 6 is moved in the order of E, and the portion 32 other than the end portion of the unit outer wall 3 is overcoated with a constant spray pattern.

When the other end 31 is approached, the paint spray port 6 is moved in the width direction by a distance of P + PA, and the distance between the paint spray port 6 and the coating surface 41 is set as a distance of LB (position of F). ), The end portion 31 is coated by moving the spray gun 1 in the X direction in the same manner as the above-mentioned end portion coating method.

Next, the paint spray port 6 is returned in the width direction by a distance of PA, and the distance between the paint surface 41 and the paint spray port 6 is set to the distance between the paint surface 42 of the portion 32 other than the end and the paint spray port 6. After returning to LA (position G), the end portion 31 of the unit outer wall 3 is overpainted while moving the spray gun 1 in the X direction in the same manner as described above.

In the above embodiment, when the end portion of the object to be coated is coated, the amount of paint sprayed is constant and the moving speed is high, but in the present invention, the moving speed is constant and the The amount of spray may be reduced. In addition, the amount of paint sprayed may be reduced and the moving speed may be increased. It is preferable that the moving speed and the spray amount are adjusted so that the maximum coating thickness at the end is almost the same as the maximum coating thickness at the portions other than the end.

Next, the coating condition at the end portion of the object to be coated by the method of the present invention will be described in more detail with reference to FIG. 3 which is an enlarged explanatory view of the main part of FIG. 5 is a spray pattern at the distance LB, 9 is a spray pattern at the distance LA, and the imaginary line in FIG. 3 shows the spray pattern 9 when the spray gun 1 is placed at the distance LA on the end 31. It is shown.

Since the width of the spray pattern becomes narrower when the spray gun 1 is placed at the distance LB than when it is placed at the distance LA, the maximum coating of the coating surface is achieved when the spray gun 1 is placed at the distance LB. Although the thickness is the same, the amount of coating material applied to the coating surface 41 is small, and the amount of coating material scattered to the outside is small.

PA is a moving distance of the spray gun 1 for moving the paint spray port 6 of the spray gun 1 in the width direction toward the central part side of the object to be coated (in the direction of the arrow) after the end 31 is coated. .. After coating the end 31 of the spray gun 1 at a distance of LB, the spray gun 1 is moved by the distance PA, and the end 31 is overpainted with the distance between the paint spray port 6 and the coating surface 41 being LA.

Since the distance between the spray port 6 of the spray gun 1 and the coating surface 41 at the end portion 31 was shortened by the repeated coating of the end portion 31, the spraying was caused on the coating surface 41 due to a poor spray state or the like. Craters can be eliminated. As a result, a uniform and good coated surface 41 of the end portion 31 is obtained.

[0030]

The distance between the paint spray port at the end and the coating surface is made shorter than the distance between the paint spray port at the portion other than the end and the coating surface, and the amount of paint sprayed at the end is reduced. Since the end is painted by reducing the amount of paint sprayed outside the area, by increasing the spray gun moving speed, or by decreasing the paint spray amount and increasing the moving speed, the painted surface of the end A small amount of paint is applied to the base, which reduces paint scattering and improves coating efficiency.

Further, since the distance between the paint spraying port and the coating surface at the end is made short, craters or the like caused by a reason such as a poor spraying state, after coating the end, move the spray gun to move the end. Can be eliminated by overcoating and coating, whereby a good and uniform coating surface is formed at the end.

Therefore, even if no additional means such as a blocking member for limiting the coating range is provided, the scattering of the paint is reduced,
The coating efficiency can be improved, and a uniform coating surface can be formed on the coating surface.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an embodiment of a spray coating method of the present invention.

FIG. 2 is an explanatory view showing a moving path of the spray gun of FIG.

FIG. 3 is an enlarged explanatory view of a main part of FIG.

FIG. 4 is a perspective view of a spray coating facility used in the spray coating method.

FIG. 5 is an explanatory diagram showing a conventional spray coating method.

[Explanation of symbols]

 1 Spray gun 2 Robot 3 Unit outer wall 4,41,42 Painted surface 5,9,13 Spray pattern 6 Paint spray port 7,10,11 Coating thickness pattern 31 End part 32 Other than end part L, LA, LB Painted surface And the distance between the paint spray port

Claims (1)

[Claims] 1. When performing spray coating on an end of an object to be coated, the distance between the paint spray port of the spray gun and the coating surface at the end is set so that the paint spray port of the spray gun other than the end and the coating surface. Distance from the end, and the amount of paint sprayed at the end is less than the amount of paint sprayed at other than the end, the spray gun moving speed is increased, or the paint spray amount is decreased and the moving speed is reduced. After painting the end part sooner or later, move the paint spray port of the spray gun toward the center of the object to be painted in the width direction, and also check the distance between the paint spray port of the spray gun and the coating surface and spray. A spray coating method, wherein the moving speed of the gun is returned to the distance between the paint spraying port of the spray gun other than the end and the surface to be painted and the moving speed of the spray gun, and the end is overcoated.