JP2002096015A - Method of applying coating material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of applying a coating material, by which the work for obtaining a coating film having uniform thickness is performed at the time of applying the coating material containing fine powder of titanium oxide having photocatalytic performance and a silicone resin as components on a material to be coated by a spray device. SOLUTION: In the spray device, the distance between a spraying part and the material to be coated and the coating speed are measured and the alarm is displayed when the distance between the spraying part and the material to be coated is deviated from a prescribed set value. The measurement of the distance between the spraying part and the material to be coated is performed by using laser beam or ultrasonic wave.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for coating a coating material, and more specifically, to a method for spraying a coating material containing fine powder of titanium oxide having photocatalytic performance and a silicone resin as components on a workpiece. The present invention relates to a method for applying a coating material capable of obtaining a coating film having a uniform film thickness when applying by using the above method.

[0002]

2. Description of the Related Art When a coating material is applied using a spray device, the thickness of the coating film formed is determined by the amount of the coating material discharged, the speed at which the spray device applies the coating (hereinafter referred to as coating speed), and the spraying of the spray. It is determined by the distance between the part and the object to be coated. However, in work performed at a coating site, a method of adjusting a coating speed and a distance to an object to be coated by a worker while visually observing a coated surface is often used.

[0003]

In the above-mentioned coating method, since the operator performs the adjustment visually, the variation in the thickness of the formed coating film becomes large depending on the skill of the operator. . In particular, when the coating material is substantially transparent, the variation in the film thickness is increased because the coating is performed with a feeling such as the degree of wetness of the painted surface.

On the other hand, in recent years, a coating material containing fine powder of titanium oxide having photocatalytic performance and a silicone resin as components has been adopted as a coating material. Titanium oxide having photocatalytic performance, when irradiated with ultraviolet rays, decomposes and removes organic substances that cause dirt and smell, thereby obtaining an antifouling and deodorizing effect. In order to effectively exhibit photocatalytic performance over a long period of time and to prevent the coating film from cracking, it is required to form the coating film uniformly. However, since this coating material is substantially transparent, it tends to cause unevenness of the coating film such as uneven coating or unpainted during coating.

The present invention has been made in view of the above circumstances, and an object of the present invention is to spray a coating material containing fine powder of titanium oxide having photocatalytic performance and a silicone resin as components on an object to be coated. An object of the present invention is to provide a coating method of a coating material which can perform an operation of obtaining a coating film having a uniform film thickness when coating with an apparatus.

[0006]

According to a first aspect of the present invention, there is provided a method of coating a coating material, comprising applying a coating material containing fine powder of titanium oxide having photocatalytic performance and a silicone resin to components to be coated with a spray device. The spraying device measures the distance between the spray outlet and the object to be coated and the coating speed, and the distance between the spray outlet and the object to be coated deviates from a predetermined set value. In this case, a warning is displayed in the event of a failure.

According to a second aspect of the present invention, in the method for coating a coating material according to the first aspect, the distance between the spray outlet and the object to be coated is measured.
The method is characterized in that a calculation is performed by irradiating a laser beam from a spray device and measuring the time until the reflected light reflected on the object to be coated is received. As described above, the distance to the object to be coated can be accurately measured without visual inspection of the operator.

According to a third aspect of the present invention, in the method for coating a coating material according to the first aspect, the distance between the spray outlet of the spray and the workpiece is measured.
The ultrasonic wave is transmitted from the spray device, and the time required for receiving the reflected wave reflected by the object to be coated is measured and calculated. As described above, the distance to the object to be coated can be accurately measured without visual inspection of the operator.

According to a fourth aspect of the present invention, there is provided a method of coating a coating material according to any one of the first to third aspects, wherein the coating speed is set such that the speed of the radiated radio wave applied to the object to be coated from the spray device is equal to the speed of the radiation. The moving speed of the spray device is calculated from the radio wave reflected by the object to be coated. As described above, the coating speed can be accurately measured without depending on the operator's feeling.

According to a fifth aspect of the present invention, in the method for coating a coating material according to any one of the first to fourth aspects, the method for displaying the warning is by voice. . According to the above, it is possible to easily inform the operator before the thickness of the coating film varies at the time of coating.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The coating material used in the coating method of the present invention contains, as components, a fine powder of titanium oxide having photocatalytic performance and a silicone resin.
The above-mentioned silicone resin is used as a film-forming component of a coating film, and one that does not deteriorate with time even if titanium oxide having photocatalytic performance is mixed therein is used. The titanium oxide is a fine powder having photocatalytic performance, and examples thereof include those having an average primary particle diameter of 50 μm or less, particularly 5 μm or less. The titanium oxide having the photocatalytic performance is capable of generating active oxygen when irradiated with ultraviolet rays and oxidizing and decomposing organic substances by the active action of the active oxygen. As a result, antifouling properties can be imparted to the coating film formed from the coating material. Further, the coating material is substantially transparent.

[0012] In the coating method, the coating material is
It is applied to the object to be coated with a spray device. Examples of the object to be coated include a building such as an outer wall, a gate and members used for the gate, a gate and the like, a fence, and the like.

As the spray device used in the coating method of the present invention, a spray gun that sprays a coating material together with compressed air from a nozzle onto a surface of an object to be coated can be used.
FIG. 1 is a block diagram showing the relation of each device of the spray device used in the present invention. The spray device includes, in addition to the member for spraying the coating material, a distance measuring device 2 for measuring a distance between a spray outlet and an object to be coated, and a speed measuring device 4 for measuring a moving speed of the spray device. ing. In the spray device, the distance between the spray outlet and the object to be coated is measured by the distance measuring device 2, and the distance between the spray outlet and the object to be coated with respect to the moving speed of the spray device set in advance by the operation unit 5 is within a range. Is determined, and a warning is issued on the warning display 6 when the value deviates from the set value. In the above-mentioned spray device, each of a distance measuring instrument 2, a speed measuring instrument 4, an operation section 5, and a warning display 6 are connected to a control section 1 constituted by a computer or the like. The control unit 1 performs a discriminator 3 for discriminating whether the distance between the spray outlet and the object to be coated is within a set range, and performs an input process from various devices and an output process to various devices. CP
U7 is provided.

In the above-mentioned coating method, the coating material is applied by the spray device while the distance between the spray outlet and the object to be coated is measured by the distance measuring device 2 and the coating speed is measured by the speed measuring device 4. .

The distance between the spray outlet and the object to be coated can be measured using a laser beam or ultrasonic waves. The distance measurement using the laser beam is performed by irradiating a laser beam from a laser diode of a distance measuring device 2 provided in a spray device, and receiving a reflected light of the laser beam reflected by an object to be coated by a light receiver provided in the distance measuring device 2. The time from irradiation to light reception can be measured and calculated. In the distance measurement using ultrasonic waves, ultrasonic waves were transmitted from a vibration transmitter of the distance measuring device 2 provided in the spray device, and the reflected waves of the ultrasonic waves reflected on the object to be coated were provided in the distance measuring device 2. It is possible to calculate by measuring the time from reception to reception at the receiver.

The above coating speed is measured based on the Doppler shift amount of the reflected radio wave reflected from the object to be radiated from the object to be radiated from the object to be radiated from the Doppler radar of a speed measuring device provided in the spray device. Thus, the moving speed of the spray device can be calculated.

In the above coating method, a set value for the moving speed of the spray device is set in advance, and it is determined whether or not the distance between the spray outlet of the spray and the object to be coated measured by the above method is within the range of the set value. Determine. Next, in the above-mentioned coating method, a warning is given on the warning display 6 when the distance between the spray outlet and the object to be coated is out of the range of the set value.

The means for issuing the warning may be sound, vibration, lighting of a lamp, or the like. Of these, sound is preferred because it is easily notified to the operator.

The above coating method can easily measure the distance between the spray outlet and the object to be coated and maintain the coating speed within a predetermined range. As a result, the above-mentioned coating method can perform an operation of obtaining a coating film having a uniform film thickness, even with a transparent coating material, without depending on the skill of the operator.

[0020]

The method for coating a coating material according to any one of claims 1 to 5, wherein the coating material containing fine powder of titanium oxide having photocatalytic performance and a silicone resin as components.
When applying to a work to be coated with a spray device, an operation of obtaining a coating film having a uniform film thickness can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the relationship between each device of a spray device used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control part 2 Distance measuring device 3 Speed measuring device 6 Warning display

Claims (5)

[Claims] 1. A coating method for coating a coating material containing fine powder of titanium oxide having photocatalytic performance and a silicone resin as components on an object to be coated by a spray device, wherein the spray device comprises a spray device. Measuring the distance and the coating speed between the blow-off part and the object to be coated, and displaying a warning when the distance between the spray outlet and the object to be coated deviates from a predetermined set value. Painting method. 2. The method according to claim 1, wherein the distance between the spray outlet and the object to be coated is calculated by measuring a time from irradiating a laser beam from a spray device to receiving a reflected light reflected by the object to be coated. The method for coating a coating material according to claim 1, wherein 3. The distance between the spray outlet and the object to be coated is calculated by measuring the time from transmitting an ultrasonic wave from a spray device to receiving a reflected wave reflected from the object to be coated. The method for coating a coating material according to claim 1, wherein: 4. The method according to claim 1, wherein the coating speed is calculated by calculating a moving speed of the spray device from a radio wave radiated from the spray device to the object and a radio wave reflected from the object. A method for coating a coating material according to claim 3. 5. The method for coating a coating material according to claim 1, wherein the method of displaying the warning is by voice.