JP3882366B2 - Multicolor pattern painting method - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a multicolor pattern coating method for coating in a spot shape, and more specifically, a plurality of different liquid paints are applied in a spot shape using a plurality of air mix coating guns that perform reciprocating operation. The present invention relates to a multicolor pattern painting method for finishing a pattern.
[0002]
[Prior art and its problems]
The present inventors are a method of applying a plurality of liquid paints having different colors to each other in the form of spots and finishing them into a multicolored pattern, which can easily form large or small spots, especially pre-coated building materials that are mass-produced in factories As a method suitable for finishing a multicolor pattern, a method of finishing a multicolor pattern by coating a plurality of different liquid paints in spots using a plurality of airmix paint guns, The inner diameter of the nozzle tip is 1 to 4 mmφ, the paint pressure is 0.5 to 10 kg / cm ² , the air mix air pressure is 0.1 to 4 kg / cm ² , the air outflow is 40 to 100 liters / minute, the gun tip A multicolor pattern coating method has been proposed, characterized in that the coating is applied in the form of spots under the condition that the distance between the surface and the surface to be coated is 300 to 1500 mm (Japanese Patent Application Laid-Open No. 9-314042 (Japanese Patent Application No. 8-1384)). No. 6)).
[0003]
The above multicolor pattern painting method is an example of an apparatus that implements this method, for example, by installing a plurality of air mix painting guns integrally and reciprocating the plurality of air mixes against the surface to be coated. Will be described with reference to FIGS. FIG. 1 is a front view of the apparatus, and FIG. 2 is a plan view of the apparatus.
[0004]
The apparatus includes, for example, a first paint gun 10 and a second paint gun 12 as illustrated. These paint guns can spray paint under the conditions described above. These coating guns are installed so that, for example, reciprocal operation can be performed together in the left-right direction of FIG. 1 (that is, reciprocating direction 14). These painting guns always spray paint during a painting operation, or spray these paint guns when they are positioned on the surface to be coated. The first paint gun 10 sprays the paint A, and the second paint gun 12 sprays the paint B. That is, these paint guns spray different paints.
[0005]
The coated surface 16 is placed on a belt conveyor 18, and the belt conveyor 18 moves the horizontal surface from the near side to the far side in FIG. 1, that is, from the lower side to the upper side in FIG. It can be moved.
[0006]
During the painting operation, for example, two painting guns always spray paint, and the coated surface 16 is moved by the belt conveyor 18 in the conveyor direction 20 in a certain direction. Thereby, the surface 16 to be coated is painted by the two painting guns.
[0007]
Although this method can achieve the intended purpose, it has been found that there is a problem to be solved that uneven coating occurs.
[0008]
According to the inventor's research, the reason why the coating unevenness occurs is as follows.
[0009]
At the time of painting, the two painting guns perform reciprocating operation, and the coated surface 16 is moved at a constant speed by the belt conveyor 18, so that the two painted guns 10 and 12 are shown in FIG. Zigzag motion as shown by arrow 22 in FIG. In FIG. 2, when two coating guns move from the left to the right with respect to the coated surface 16, the coating B is sprayed onto the coated surface 16 by the second coating gun 12, and the first coating is applied thereon. The paint A is sprayed by the gun 10. When the paint gun 2 moves from left to right and reaches the right end, it will move from right to left. When the second coating gun moves from the right to the left with respect to the coating surface 16, the coating A is sprayed onto the coating surface 16 by the first coating gun 10, and the coating material A is sprayed thereon by the second coating gun 12. B is sprayed. In this way, since the coating conditions are different when moving from left to right and when moving from right to left, uneven coating occurs.
[0010]
Accordingly, an object of the present invention is to remove the coating unevenness as described above.
[0011]
[Means for Solving the Problems]
According to the present invention, in order to achieve the object as described above,
A multicolor pattern coating method for finishing a multicolor pattern by coating a plurality of different liquid paints in spots using a plurality of air mix paint guns that perform reciprocal operation, Inner diameter is 1 to 4 mmφ, paint pressure is 0.5 to 10 kg / cm ² , air mix air pressure is 0.1 to 4 kg / cm ² , air outflow is 40 to 100 liters / minute, gun tip and coated surface In the multicolor pattern coating method in which the distance to the surface is 300 to 1500 mm and the surface to be coated is coated in a spotted pattern,
A multicolor pattern coating method is provided in which the spray patterns formed by the plurality of air mix coating guns are crossed before hitting the surface to be coated.
[0012]
【Example】
A preferred embodiment of the present invention will now be described with reference to FIGS.
[0013]
Device shown in FIG. 3 and 4, as illustrated, comprises a first coating gun 30 and the second coating gun 3 2. These painting guns are installed so that they can be reciprocated together in the left-right direction (i.e., the reciprocating direction 34) in the same manner as the painting guns of the conventional apparatus described with reference to FIGS. The coated surface 36 which is moved in the direction 40 of the conveyor at a constant speed is coated by the belt conveyor 38.
[0014]
In this coating apparatus, the first coating is performed such that the spray pattern 42 formed by the first coating gun 30 and the spray pattern 44 formed by the second coating gun 32 intersect before hitting the surface to be coated. The orientation of the gun 30 and the second paint gun 32 is determined.
[0015]
By these two spray patterns 42 and 44, a paint area 50 is formed, and this paint area 50 moves sequentially.
[0016]
The distance from the nozzle tip of the coating gun to the location where the central axes 46 and 48 of the two spray patterns 42 and 44 intersect is preferably 200 to 400 mm. If this distance is shorter than 200 mm, there is a risk of adversely affecting the spraying of an appropriate paint due to the influence of the air of the other paint gun. When this distance is longer than 400 mm, the speed of the atomized particles becomes slow, and the particles adhere to each other, causing a problem that appropriate coating cannot be performed.
[0017]
The first painting gun 30 and the second painting gun 32 are preferably located in the same vertical plane including the reciprocating direction 34, and the intersection angle Θ of the central axes 46, 48 of the two spray patterns 42, 44 is: It is preferable that it is 10-60 degrees. If the crossing angle Θ is smaller than 10 °, the distance from the tip of the coating gun nozzle to the crossing point becomes too long, and the apparatus becomes large. When the crossing angle Θ is larger than 60 °, it becomes difficult for the paint to adhere to the surface to be coated, resulting in the problem of staining the vicinity.
[0018]
When three or more coating guns are used, it is preferable that the crossing angle Θ of the central axis of the spray pattern formed by the coating guns on both sides is 10 to 60 °.
[0019]
【The invention's effect】
As described above, since the spray pattern formed by the plurality of air mix painting guns is made to cross before hitting the surface to be coated, it is possible to effectively remove the coating unevenness caused by the operation direction of the reciprocating operation.
[Brief description of the drawings]
FIG. 1 is a front view of a conventional coating apparatus.
FIG. 2 is a plan view of a conventional coating apparatus.
FIG. 3 is a front view of a part of a coating apparatus for carrying out the method of the present invention.
4 is a plan view of the coating apparatus of FIG. 3;
[Explanation of symbols]
30 First coating gun 32 Second coating gun 34 Reciprocating direction 36 Surface 38 Belt conveyor

Claims (2)

A multicolor pattern coating method for finishing a multicolor pattern by coating a plurality of different liquid paints in spots using a plurality of air mix paint guns that perform reciprocal operation, Inner diameter is 1 to 4 mmφ, paint pressure is 0.5 to 10 kg / cm ² , air mix air pressure is 0.1 to 4 kg / cm ² , air outflow is 40 to 100 liters / minute, gun tip and coated surface In a multicolor pattern coating method in which a moving surface to be coated is spotted under the condition that the distance is 300 to 1500 mm,
The spray pattern formed by the plurality of air mix paint guns is allowed to cross before hitting the surface to be coated,
The distance from the tip of the nozzle of the coating gun to the intersection is 200 to 400 mm,
A multicolor pattern painting method characterized in that two painting guns are used and the central axes of the spray patterns of the two painting guns intersect at an intersecting angle of 10 to 60 °. A multicolor pattern coating method for finishing a multicolor pattern by coating a plurality of different liquid paints in spots using a plurality of air mix paint guns that perform reciprocal operation, Inner diameter is 1 to 4 mmφ, paint pressure is 0.5 to 10 kg / cm ² , air mix air pressure is 0.1 to 4 kg / cm ² , air outflow is 40 to 100 liters / minute, gun tip and coated surface In a multicolor pattern coating method in which a moving surface to be coated is spotted under the condition that the distance is 300 to 1500 mm,
The spray pattern formed by the plurality of air mix paint guns is allowed to cross before hitting the surface to be coated,
The distance from the tip of the nozzle of the coating gun to the intersection is 200 to 400 mm,
Three paint guns are used, and the central axes of the spray patterns of the two paint guns on both sides intersect at an angle of 10-60 °
Multicolor pattern painting method characterized by this.

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