JPH0593565U - Air nozzle for spray gun for painting - Google Patents

Abstract

(57) [Summary] [Purpose] The paint is smoothly dispersed by intersecting the discharge direction of the air discharged to the discharge part with the flow direction of the paint flowing in the discharge part. [Structure] An air nozzle of a spray gun for painting, in which an air nozzle for ejecting air is concentrically provided at an axial center of an ejecting portion for ejecting paint, wherein the air nozzle is an air ejecting opening outward in a radial direction. A plurality of outlets are formed in the circumferential direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air nozzle of a spray gun for coating, which sprays a discharged paint into a predetermined shape by compressed air and applies it to a surface to be painted.

[0002]

[Prior Art]

 As a conventional technique, there is one shown in FIG. In FIG. 5, reference numeral 1 denotes a paint discharge pipe through which paint is discharged, and a nozzle head 2 is connected to the tip (right end) of the paint discharge pipe 1. The tip of the nozzle head 2 is curved downward, and a cone-shaped mix nozzle 3 is attached to the tip of this curved portion. Further, the air nozzle pipe 5 is inserted into the upper wall of the curved portion of the nozzle head 2 via the pipe guide 4. The tip of the air nozzle pipe 5 is arranged at the axial center of the nozzle head 2, and the air nozzle 6 is connected to this tip. The air nozzle 6 has its discharge port 6a formed on the same axis as the discharge port 3a of the mix nozzle 3.

Reference numeral 9 denotes a valve case for opening and closing the paint supply passage and the air supply passage, and a paint supply hose connection portion 10 connected to a paint pump (not shown) on the left side and an air connected to an air pump (not shown). A supply hose connection part 11 is provided, the paint discharge pipe 1 and the air nozzle pipe 5 are connected to the right part, and a valve lever 13 provided on the upper part simultaneously opens and closes the paint supply passage and the air supply passage provided inside. It is like this. The paint discharge pipe 1 is directly connected to the valve case 9, and the air nozzle pipe 5 is connected to the valve case 9 via a union elbow 7 and a flexible tube 8.

[0004]

[Problems to be solved by the device]

 In the above-mentioned conventional one, since the discharge port 6a of the air nozzle 6 is opened on the same axis as the discharge port 3a of the mix nozzle 3, the flow direction of the air discharged from the discharge port 6a is within the mix nozzle 3. The flow direction of the paint is the same as that of the flowing paint, and particularly in the case of highly viscous paint, there is a drawback that the paint and air are not sufficiently mixed and the paint cannot be dispersed smoothly. An object of the present invention is to obtain a new air nozzle for a spray gun for painting which solves the above drawbacks.

[0005]

[Means for Solving the Problems]

 The present invention is configured as follows to achieve the above object. That is, in an air nozzle of a spray gun for painting, which has a concentric air nozzle for ejecting air at the axial center of the ejecting portion for ejecting paint, the air nozzle is an air ejecting opening outward in the radial direction. The configuration is such that a plurality of outlets are formed in the circumferential direction.

[0006]

[Action]

 Since the present invention is configured as described above, the flow direction of the air discharged from the air nozzle intersects the flow direction of the paint flowing in the paint discharge portion. For this reason, the paint and the air are mixed well in the discharge section.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In the drawings, FIG. 1 is a sectional side view of an essential part showing an embodiment of the present invention, FIG. 2 is a partial sectional view of an air nozzle, FIG. 3 is a III-III sectional view thereof, and FIG. It is an expanded sectional view. In FIG. 1, the same reference numerals as those in FIG. 5 have the same structures as those in FIG. Reference numeral 15 is an air nozzle connected to the tip of the air nozzle pipe 5. As shown in FIGS. 2 and 3, the air nozzle 15 forms a main path 16 having a left end opened at the axial center of the main body 15a and a right end, that is, a front end side closed, and the main path 15a has the above main path. Four branch passages, that is, air outlets 17 extending in the radial direction outward from the right end of 16 and opening at the outer peripheral surface of the main body 15a are formed in the circumferential direction.

FIG. 4 shows another embodiment of the air nozzle. In this structure, a main path 16a having a left end opened and a right end closed at the axial center of the main body 15a is formed, and the right end of the main body 15a extends radially outward from the right end of the main path 16a. After that, four branch passages that are bent in the tangential direction of the main body 15a and open at the outer peripheral surface of the main body 15a, that is, the air discharge ports 17a are formed in the circumferential direction.

Next, an operation mode of the above embodiment will be described. The paint supply hose connection part 10 is connected to the paint pump, and the air supply hose connection part 11 is connected to the air pump. In this state, the valve lever 13 is opened. Then, the paint is supplied from the paint pump to the paint discharge pipe 1, the paint flows in the axial direction of the nozzle head 2 and is discharged into the mix nozzle 3, and at the same time, the air is supplied from the air pump to the air nozzle pipe 5. The supplied air is discharged into the nozzle head 2 from the air discharge port 17 (17a) of the air nozzle 15. In this case, in the embodiment shown in FIGS. 2 and 3, the air discharged from the air discharge port 17 is discharged radially outward into the nozzle head 2 and flows in the nozzle head 2. Is stirred. Further, in the embodiment of FIG. 4, the air discharged from the air discharge port 17a is displaced into the nozzle head 2 from its axial center, is discharged radially outward, and is flowing in the nozzle head 2. Stir and swirl paint. The paint and air discharged into the nozzle head 2 are mixed in the mix nozzle 3 and discharged from the discharge port 3a toward the outside in a predetermined shape (pattern).

[0010]

[Effect of the device]

 As is clear from the above description, in the present invention, the discharge direction of the air discharged to the discharge section is made to intersect the flow direction of the paint flowing in the discharge section, so that the dispersion of particularly viscous paint can be prevented. The effect is that it is carried out smoothly and a stable coated surface can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view of essential parts showing an embodiment of the present invention.

FIG. 2 is a partial sectional view of an air nozzle according to the present invention.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a cross-sectional view of an air nozzle showing another embodiment.

FIG. 5 is a sectional side view of a main part showing a conventional example.

[Explanation of symbols]

 1 Paint Discharge Pipe 2 Nozzle Head 3 Mix Nozzle 3a Discharge Port 4 Pipe Guide 5 Air Nozzle Pipe 7 Union Elbow 8 Tube 9 Valve Case 10 Paint Supply Hose Connection 11 Air Supply Hose Connection 13 Valve Lever 15 Air Nozzle 15a Main 16 Main Route 16a Main route 17 Air outlet 17a Air outlet

Claims (1)

[Scope of utility model registration request] 1. An air nozzle of a spray gun for coating, wherein an air nozzle for discharging air is concentrically provided at an axial center of a discharge portion for discharging a coating material, wherein the air nozzle is opened outward in a radial direction. An air nozzle for a spray gun for painting, characterized in that a plurality of air outlets are formed in the circumferential direction.