CN105665208A - Atomizing air cap of polyurea spray gun - Google Patents

Abstract

The invention provides an atomizing air cap of a polyurea spray gun, which belongs to the technical field of polyurea elastomer spraying. It consists of anti-slip structure, thread structure, three sets of atomizing holes (side atomizing holes and two sets of auxiliary atomizing holes) and central atomizing holes. The present invention omits the structure that the conventional atomizing air cap is fastened by a buckle, and optimizes the design of the atomizing hole of the atomizing air cap to improve the atomization effect, make the droplets finer, and improve the decorativeness of the paint film ;The paint mist is less scattered, which reduces the waste of materials, reduces the cost and is beneficial to the environment; the structure of the supporting parts such as the atomizing air cap of the polyurea spray gun is simpler, and the staff can install and disassemble the atomizing air cap more quickly and labor-savingly, and replace the spray gun Spray head and other internal components of the spray gun body.

Description

An atomizing air cap of a polyurea spray gun

technical field

The invention belongs to the technical field of spraying polyurea elastomers, and relates to an atomizing air cap structure of a polyurea spraying gun.

Background technique

The traditional polyurea spraying is that the isocyanate component and the amino compound component (hereinafter referred to as material A and material B respectively) produce mixed impact in the body of the polyurea spray gun, and the mixing of the two components is realized at the moment of impact. The chemical reaction produces an elastomer material, and the high-pressure air-assisted spraying atomization effect is better, but due to the splash of polyurea material, the material is wasted, and the polyurea material is more expensive, which increases the construction cost and has a series of negative effects on the environment ; When high-pressure air-assisted spraying needs to replace parts such as nozzles, only the buckle and atomizing air cap can be removed to replace parts such as nozzles of the required size, which is a waste of time and difficult to operate.

Contents of the invention

The object of the present invention is to provide a novel atomizing air cap structure of a polyurea spray gun in order to solve the above problems.

The technical solution adopted by the present invention is: the inner side of the atomizing air cap is designed with a threaded structure, and the spray gun body is directly installed with threads, and the outer side of the atomizing air cap is designed with a trapezoidal and plane intersecting circumferential arrangement of anti-skid structure. The atomizing air cap is designed with three groups of atomizing holes and the central atomizing hole, and the three groups of atomizing holes are respectively a group of side atomizing holes and two groups of auxiliary atomizing holes.

The beneficial effects of the technical solution proposed in the present invention are:

First, due to the omission of the structure of adding a buckle to the normal atomizing air cap, when it is necessary to replace the internal components such as the spray head, the atomizing air cap can be quickly disassembled to replace the internal components.

Second, the auxiliary atomization hole of the atomization air cap is better designed, and the atomization effect is improved through high-pressure atomization and air-assisted atomization, and the atomization particles are finer, which can reach less than 70 μm, which improves the decorativeness of the paint film.

Third, the spraying efficiency can be as high as more than 75%, and the paint mist is less scattered, which reduces material waste, reduces costs and is beneficial to the environment.

Fourth, the structure of the atomizing air cap is simple and easy to process.

Description of drawings

Below in conjunction with accompanying drawing, the present invention is described in further detail:

Fig. 1 is the front view of the general assembly drawing of spray gun atomizing air cap of invention;

Fig. 2 is the left view of the spray gun atomizing air cap of invention;

Fig. 3 is the left side view of the general assembly drawing of the spray gun atomizing air cap of invention;

In the figure, 1 is the protrusion of the atomizing air cap; 2 is the anti-slip structure; 3, 4 and the two atomizing holes facing the transverse axis of the atomizing air cap are side atomizing holes; 5, 6, 12 and the atomizing air The three atomizing holes facing the transverse axis of the cap are the first group of auxiliary atomizing holes, 7, 8, 9, 10, and 11 are the second group of auxiliary atomizing holes; 13 is the central atomizing hole.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings.

As shown in Figure 1, the inner side of the atomizing air cap is designed with a threaded structure, and correspondingly, a threaded structure of the same size is designed on the spray gun body to cooperate with it, which saves the traditional installation buckle to fix the atomized air cap. After the spray gun is assembled, the atomizing air cap and the spray gun body are directly threaded to provide the axial fixed pressure between the atomizing air cap, spray head and other parts in the spray gun mixing chamber and the spray gun body 4, so that the fit is stable, and due to the threaded installation With the structure that omits the buckle, the spray gun keeps better sealing, and the internal high-pressure air and high-pressure polyurea material are not easy to leak; at the same time, an anti-slip structure is designed on the outside of the atomizing air cap, and the anti-slip structure is designed as a trapezoidal and plane intersection The circular arrangement structure is beneficial for the staff to quickly and effortlessly install and disassemble the atomizing air cap, and replace the internal components of the spray gun body such as the spray gun nozzle.

As shown in Figure 2, in order to improve the atomization effect of the polyurea material, the atomization air cap is designed with three groups of atomization holes and the central atomization hole. Three groups of atomizing holes include side atomizing holes and two groups of auxiliary atomizing holes. The side atomizing holes include atomizing holes 3, 4 and two atomizing holes opposite to the transverse axis of the atomizing air cap, wherein the diameter of the atomizing hole 4 is smaller than the diameter of the atomizing hole 3, and the ejected compressed air will The material spray pattern is extruded into the required shape; the first group of auxiliary atomizing holes includes atomizing holes 5, 6, 12 and three atomizing holes opposite to the transverse axis of the atomizing air cap, among which, the atomizing holes 5, 6, 12 are arranged in a triangle, the diameters of atomizing holes 5 and 12 are the same, slightly larger than the diameter of atomizing hole 6; the second group of auxiliary atomizing holes includes atomizing holes 7, 8, 9, 10, 11, etc. 8 atomizing holes. After the high-pressure air is sprayed from the auxiliary atomizing air hole, it is beneficial to surround the high-pressure polyurea material, so that the polyurea material is not easy to fly, and the atomized material particles are further refined.

As shown in Figure 3, the diameter of the center hole of the atomizing air cap is larger than the outer diameter of the outlet of the material ejected from the nozzle. When the spray gun body and the atomizing air cap are assembled, a cylindrical ring is formed at the center hole of the atomizing air cap and the outlet of the material ejected from the nozzle. The central atomizing hole 13 of the structure, the axis of the central atomizing hole 13 coincides with the axis of the nozzle outlet. When the spray gun is working, the high-pressure air sprayed from the central atomizing hole 13 impacts the high-pressure material, making the atomized particles finer and the quality of the coating layer formed is higher. At the same time, the central atomizing hole 13 can prevent the material from accumulating at the nozzle .

Further, there are two oblique projections of the same size on the atomizing air cap, which are opposite to the transverse axis of the atomizing air cap, and the side atomizing holes are obliquely placed on it.

Furthermore, the atomizing air cap of the present invention is not only suitable for polyurea material spraying spray guns, but also suitable for other high-pressure air-assisted spraying spray guns.

Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative rather than limiting. Under the inspiration, on the premise of not violating the spirit and claims of the present invention, various similar representations can be made, and such transformations all fall within the protection scope of the present invention.

Claims (9)

1. An atomizing air cap of a polyurea spraying gun, which consists of a protrusion (1), an anti-slip structure (2), a thread structure, side atomizing holes, two sets of auxiliary atomizing holes and a central atomizing cap. Holes (13) form. 2. The atomizing air cap according to claim 1, characterized in that the inner side is designed with the threaded structure, which saves the traditional installation buckle structure, and is directly installed with the spray gun body using the threaded structure. 3. The atomizing air cap according to claim 1, characterized in that the anti-slip structure (2) is designed on the outside, and the anti-slip structure (2) is designed as a trapezoidal and plane intersecting circumferential arrangement structure. 4. The side atomizing hole according to claim 1, characterized in that it consists of an atomizing hole (3), an atomizing hole (4) and two atomizing holes opposite to the transverse axis of the atomizing air cap; Wherein, the diameter of the atomization hole (4) is smaller than the diameter of the atomization hole (3). 5. The auxiliary atomizing hole according to claim 1, characterized in that it comprises a first group of auxiliary atomizing holes and a second group of auxiliary atomizing holes. 6. The first group of auxiliary atomizing holes according to claim 5, characterized in that the atomizing holes (5), the atomizing holes (6), the atomizing holes ((12) and the transverse axis of the atomizing air cap Composed of three atomizing holes; wherein: the atomizing hole (5), the atomizing hole (6), and the atomizing hole (12) are arranged in a triangle; the atomizing hole (5), The diameters of the atomization holes (12) are the same size, slightly larger than the diameter of the atomization holes (6). 7. The second group of auxiliary atomizing holes according to claim 5, characterized in that by atomizing holes (7), atomizing holes (8), atomizing holes (9), atomizing holes (10), atomizing holes The atomization hole (11) is composed of 8 atomization holes with the same size in the circumferential direction. 8. The atomizing air cap according to claim 1, characterized in that the diameter of the center hole of the atomizing air cap is greater than the diameter of the outlet of the material ejected from the nozzle. After the spray gun body and the atomizing air cap are assembled, the center of the atomizing air cap The holes and nozzles eject the material outlet to form a central atomizing hole (13) in a cylindrical shape. 9. The atomizing air cap according to claim 1, characterized in that there are two oblique projections of the same size on the atomizing air cap, opposite to the transverse axis of the atomizing air cap, and the side atomizing holes are oblique put on it.