JPH0810663A - Coating machine for spraying spotted pattern - Google Patents

Abstract

PURPOSE:To granulate a liq. coating, to spray it and to perform uniformly spray coating of a spotted pattern with a required size by specifying air blowing ability of a blower and the area of a spraying hole for air for spraying fed from the blower in an air spray gun. CONSTITUTION:A motor 2 wherein the number of rotation is controlled by means of an invertor 7 and a low pressure and large flow rate blower 3 are installed on a base stage 1. In addition, a belt 6 is hung over on a pulley 4 fixed on an output shaft of a motor 2 and a pulley 5 fixed on the driving shaft of the blower 3. In addition, the outlet 4 of the blower 3 is connected with an air spray gun 9 through a hose 8. In this case, the air blowing ability of the blower 3 is set to 200Nl/min under a pressure of 0.1kgf/cm<3>. In addition, the area of a spraying hole for the air for spraying fed from the blower in an air spray gun 9 is set at 20-40mm<2>. The liq. coating is granulated and sprayed thereby and spray coating of a spotted pattern with a required size is uniformly performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating machine mainly used for forming a spot pattern having a particle size of about 2 to 3 mm on a building material by spraying.

[0002]

^2. Description of the Related Art Conventionally, in order to form a spot pattern by spraying, an ordinary air spray gun for atomizing a paint to 5 to 20 μm is used, and a pressure of a compressor of about 6 kgf / cm ² is set to 0.1 kgf / cm ² by a regulator. It was lowered to cm ² and supplied as atomizing air.

[0003]

However, in a normal air spray gun, the spraying area of atomizing air is about 4 m.
As small as m ² , 30 Nl at a pressure of 0.1 kgf / cm ^2.
The maximum size of the spot is about 1 mm because only an air volume of about / min can be obtained, and the pressure of the atomization air is significantly reduced by the regulator, so the pressure becomes unstable and the size of the spot is small. However, there is a drawback that the size of the spots is almost impossible to control.

[0004]

As a means for solving such a problem, the present invention provides a blower having a blowing capacity of 200 Nl / min at a pressure of 0.1 kgf / cm ² and a motor for driving the blower. And an inverter for controlling the number of rotations of the motor, and an air spray gun in which the atomizing air supplied from the blower has an outlet area of 20 to 40 mm ² .

[0005]

Since the present invention has the above-mentioned structure and the low-pressure blower is used as the supply source of the atomizing air, it is not necessary to reduce the pressure by the regulator, and the atomizing air having a stable pressure can be obtained. Also, since the flow rate is large and the atomizing air ejection port area of the air spray gun is large, a large amount of atomizing air can be obtained,
Further, since the flow rate is adjusted by controlling the rotation speed of the drive motor by the inverter, it can be arbitrarily controlled.

Therefore, the paint can be granulated with a relatively large particle size, and the particle size can be controlled arbitrarily.

Therefore, it is possible to form a spotted pattern having a relatively large diameter of 2 to 3 mm and a uniform size and a desired size.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 designates a base on which a motor 2 whose rotation speed is controlled by an inverter 7 and a low-pressure large-flow blower 3 are installed and fixed to an output shaft of the motor 2. A belt 6 is stretched around a pulley 4 and a pulley 5 fixed to a drive shaft of a blower 3, and a discharge port of the blower 3 is connected to an air spray gun 9 by a hose 8.

As shown in FIG. 2, in the air spray gun 9, a valve rod 11 is inserted into a paint passage 10 connected to a paint supply pipe 12, and an opening / closing air supply pipe 13 is connected to an air cylinder (not shown). When pressurized air is supplied,
The valve rod 11 is retracted to open the valve port, and the paint is ejected from the paint ejection port 14.

An air reservoir 16 connected to an atomizing air supply pipe 15 is formed around the paint passage 10, and the atomizing air supply pipe 15 is connected to the hose 8 described above.

An air reservoir 1 is provided around the paint ejection port 14.
A ring-shaped atomizing air ejection port 17 communicating with 6 is formed, and the paint ejected from the paint ejection port 14 is sprayed with air to be granulated.

At the tip of the air spray gun 9 are formed two upper and lower pattern air jets 18 for flattening the paint flow by blowing pressurized air toward the paint flow jetted from the paint jet 14. .

In the air spray gun 9 described above,
The area of the atomizing air ejection port 17 was about 4 mm ² in the past, but is 30 mm ² in this embodiment, and it is ² mm at a pressure of 0.1 kgf / cm ² from the blower 3.
Air of 00 Nl / min is designed to be ejected.

For this reason, the liquid paint ejected from the paint ejecting port 14 is granulated into large particles and applied to the object to be coated, and the diameter is 2
Form a speckled pattern of ~ 3 mm.

The size of the spot pattern changes depending on the amount of air blown by the blower 3, and the amount of air blown is controlled by controlling the rotation speed of the motor 2 by the inverter 7.

[Brief description of drawings]

FIG. 1 is a side view showing an outline of an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of an air spray gun according to an embodiment of the present invention.

[Explanation of symbols]

 2: Motor 3: Blower 7: Inverter 9: Air spray gun 14: Paint jet 17: Atomizing air jet

Claims (1)

[Claims] 1. A pressure of 0.1 kgf / cm ² and 200 N
A blower having a blowing capacity of 1 / min, a motor that drives the blower, an inverter that controls the rotation speed of the motor, and an ejection port area of the atomizing air supplied from the blower are 20 to 40 mm ² . A coating machine for spot pattern spraying, which is characterized by consisting of an air spray gun.