JP2738389B2 - Air spray gun for two-component mixed paint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-pack type paint suitable for, for example, mixing and discharging a liquid paint component composed of a resin as a coating film forming element and a liquid catalyst component as a curing agent. Related to air spray guns.

[0002]

2. Description of the Related Art As a conventional method for mixing a two-pack type paint, for example, as disclosed in Japanese Patent Application Laid-Open No. 6-236217, a paint component and a catalyst component are fed into a mixer in a liquid state, mixed and mixed. A method of feeding a painted material to a spray gun is known. FIG. 2 shows a part of the conventional mixer 1. The mixer 1 has a mixing tube 11 and its inlet 2 and outlet 3, and a premix screen 5 in a mixer interior 4.
And a mixer rod 6 are provided. The premixing screen 5 is formed in a cylindrical shape, and has an annular flange 8 that contacts the tube wall 7 of the mixing tube 11, a through hole 9 formed in the center in the axial direction,
It has a plurality of screen holes 10 formed to extend radially outward from the center through hole 9.

[0003] In such a configuration, the resin and the catalyst are introduced into the mixer 1 through the inlet 2 and flow into the central through-hole 9 of the premix screen 5. Then, a part of the resin and the catalyst flows along the central through-hole 9, and the rest moves radially outward from the central through-hole 9 through the screen hole 10 so that the outer surface of the premixing screen 5 and the pipe of the mixing pipe 11 are moved. It mixes between the walls 7 and is discharged by a paint discharger or spray gun. That is, in the above-described conventional example, the two-pack type paint is mixed by being fed into the mixer 1 having a complicated shape in a liquid state through the same path.

[0004]

However, in the above conventional example, the two kinds of components are sent to the mixer 1 in a liquid state and mixed, so that a curing reaction occurs in the mixer 1,
It is difficult to clean the inside of the mixer 1 having a path or a complicated shape, and as a result, there is a problem that it is not possible to respond to a variety of painting needs.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide an air spray gun for a two-part mixture type paint which can reduce the curing of a curable liquid component and can meet various kinds of painting needs. Aim.

[0006]

In order to achieve the above object, the present invention provides a mixing chamber having an interior coated therein, atomizing means for atomizing two kinds of coating materials, both of which are liquid, in the mixing chamber. It has a coated propeller that stirs two kinds of coating materials atomized by the atomizing means with pressurized air, and is characterized in that two kinds of liquid coating materials are mixed in an atomized state.

[0007] Further, the invention is characterized in that the two propellers rotate so that the vicinity of the entrances of the two types of coating materials in the mixing chamber is negatively pressured and the two types of coating materials are sucked into the mixing chamber. Further, the pressure in the vicinity of the outlet of the mixing chamber is set to a negative pressure by the pressure air, and the mixture is discharged to the outside, which is atomized and stirred inside the mixing chamber.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing an embodiment of an air spray gun for a two-component mixed paint according to the present invention.

In FIG. 1, a paint component composed of a resin which is a coating film forming element and a catalyst component which is a curing agent are respectively supplied from below a barrel portion through flow paths 2 and 3 having an inner diameter of 7 mm, for example. Next, it is supplied into the mixing chamber 4 through the mixing chamber inlets 10 and 11 having an inner diameter of, for example, φ2 mm. A propeller 8 is arranged in the mixing chamber 4, and the two components are mixed in the mixing chamber 4 by rotating the propeller 8, and are discharged to the outside through the discharge port 9.

Further, pressure air is supplied to the handle through the flow path 5, and the pressure air is discharged to the outside through an air discharge port 13 provided around the coating material discharge port 9. A valve 12 that opens when the lever 1 rotates is provided in this flow path, and an impeller 6 is provided downstream of the valve 12. The impeller 6 is connected to a propeller 8 via a shaft 7. The interior of the mixing chamber 4, the propeller 8, and the shaft 7 are coated with silicon.

In such a configuration, when the operator rotates the handgrip by pulling the lever 1 with the handle, the valve 12 is opened, the pressure air is supplied through the flow path 5, and the external air is supplied through the discharge port 13. Is discharged. At this time, the impeller 6
Rotates, and the propeller 8 in the mixing chamber 4 rotates in conjunction therewith, whereby the pressure near the mixing chamber inlets 10 and 11 becomes negative. Further, the pressure near the coating material discharge port 9 becomes negative due to the pressure of the air discharged from the air discharge port 13 provided around the coating material discharge port 9.

As a result, the paint component and the catalyst component supplied into the mixing chamber 4 through the φ2 mm flow paths 2 and 3 are atomized at the mixing chamber inlets 10 and 11 having an inner diameter of φ2 mm, respectively, and are atomized. Is sucked into the mixing chamber 4. Next, the mist-like paint component and the catalyst component are stirred and uniformly mixed by the propeller 8, and then the mist-like mixture is applied to the coating material discharge port 9 by the negative pressure near the coating material discharge port 9.
Is discharged to the outside through

Therefore, according to the above embodiment, the two kinds of components are fed to the mixer 1 in the form of a mist, so that the curing reaction in the mixer 1 can be reduced. Even if some curing reaction occurs, the inside of the mixing chamber 4 and the propeller 8 and the shaft 7 are coated with silicon, so that the cleaning is easy, and as a result, it is possible to meet a variety of painting needs. it can.

[0014]

As described above, according to the present invention, two kinds of coating materials, both in liquid form, are atomized in a mixing chamber, the two kinds of atomized coating materials are stirred by a propeller, and further mixed. Because the propeller inside is coated, the curing of the curable liquid component can be reduced to meet a variety of painting needs.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of an air spray gun for a two-component mixed paint according to the present invention.

FIG. 2 is a configuration diagram showing a conventional two-liquid mixing type paint mixing apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 lever 2 paint component flow path 3 catalyst component flow path 4 mixing chamber 5 air flow path 6 rotating blade 7 shaft 8 propeller 9 coating material discharge port 10 paint component inlet 11 catalyst component inlet 13 air discharge port

Claims (3)

(57) [Claims] 1. A mixing chamber having an interior coated thereon, atomizing means for atomizing two kinds of coating materials, both liquid, in the mixing chamber, and two kinds of coating materials atomized by the atomizing means. And a coated propeller that agitates with a pressurized air, wherein the two kinds of liquid coating materials are mixed in an atomized state. 2. The rotation of the propeller causes a negative pressure near the inlets of the two types of coating materials in the mixing chamber,
2. The air spray gun for a two-component mixed paint according to claim 1, wherein said two kinds of coating materials are sucked into said mixing chamber. 3. The two-part liquid according to claim 1, wherein the pressure air makes the vicinity of the outlet of the mixing chamber a negative pressure and discharges the atomized and agitated outside inside the mixing chamber. Air spray gun for mixed paint.