JP3478523B2 - Thick-coating spray nozzle device, coating method, and automobile body - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection nozzle device suitable for thick coating of viscous liquid, a coating method, and an automobile body coated with a vibration damping layer, a sound absorbing layer, a sound insulating layer, a rust preventive coating, etc. by the coating method. .

[0002]

2. Description of the Related Art As the weight of an automobile body is reduced, small vibrations and small noises are likely to be generated, and the vibrations and noises cause resonance or resonance to make passengers uncomfortable. Vibration control,
Although an elastic layer having functions of sound absorption and sound insulation is formed, conventional methods for forming vibration damping, sound absorption and sound insulation layers are
An elastic sheet is attached or polyvinyl chloride paint is applied. When applying this paint, use an airless fan-shaped spray nozzle for general-purpose paint application.
Spray coating is usually performed under a high pressure of about 0 kg / cm ² .

[0003]

In the pasting of the sheet according to the above-mentioned conventional method, since the pasting portion has a complicated shape, a sheet cut into a shape that matches the pasting portion is pasted by hand. Therefore, it is difficult to automate the work.

In spray coating, a paint having a high viscosity and a high concentration is formed by high pressure spraying using an airless fan-shaped spray nozzle to form a coating layer having a thickness of about 5 to 10 mm. When a high-viscosity paint is sprayed with a nozzle, the spray fan shape has a remarkably narrow angle, so the pattern width is naturally small, and there is a drawback that a so-called tail phenomenon occurs, and 100 k
Since it is sprayed from a short distance of about several tens of mm under a high pressure of about g / cm ² , the paint that has collided with the surface to be painted is cast in the direction of both edges by the momentum of the collision, and the thickness of both edges is at the center. There is a drawback that it is formed significantly thicker than that of the part, and since it is airless sprayed at a higher pressure,
It is inevitable that paint splashes will adhere to areas other than the application area.Therefore, it is necessary to perform masking by hand to prevent these splashes from adhering.In addition, after the painting, the mask is peeled off and the peeled masking material is scrapped. Is extremely uneconomical, such as requiring.

Therefore, an object of the present invention is to provide a nozzle device and a coating method for forming a thick coating film layer of a highly viscous liquid under masking-less uniform distribution.
Another object of the present invention is to provide an automobile body provided with an elastic coating film layer having functions such as vibration damping, sound absorption and sound insulation by the above coating method.

[0006]

In order to achieve the above object, the present invention has a structure in which a large number of fine holes are radially (fan-shaped) provided in a row as a nozzle device, or a large number of narrow grooves are radially formed on the inner surface ( A fan-shaped nozzle member is used on at least one side to provide a split type fan-shaped slit, and in order to correspond to the properties of the paint, the distribution of the pores and grooves or the distribution area of each individual It may be unevenly distributed, and the spray gun equipped with the nozzle device may be moved by a robot hand, and the spray distance to the surface to be coated may be changed to spray under the condition that the pattern width is adjusted. To do.

In a nozzle device in which a large number of fine holes are provided in a row in a radial fan shape, or a fan-shaped slit in which a large number of fine grooves are carved in a radial fan shape is provided on at least one inner surface, the paint is applied to the nozzle. While propelling along the radial flow path in the device, it is ejected in a fan shape from the nozzle opening without producing droplets. Therefore, under the condition that the injection gun equipped with the nozzle device is held in the robot hand, By coating while changing the distance of the nozzle ejection port to the coating surface and the moving speed of the nozzle, the coating width and the thickness of the coating layer can be freely adjusted and the coating can be formed to a uniform thickness.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the embodiments shown in the drawings.

1 to 3 show an embodiment of the nozzle device 1 of the present invention, which is a main member 1a.
At least one of the nozzle members, for example, the cover member, adopts a two-part nozzle of the type in which the two nozzle members of A large number of gutter-shaped grooves 3 having a depth of 0.2 mm and a width of 0.5 mm are provided on the contact surface in 1b.
Are engraved in a vertical direction so as to be slightly divergent from each other, a large number of the pores are formed in a fan shape in a row under the joining with the main member 1a, and the communication grooves 4 communicating with these pores are formed. 4 is engraved on the main member 1a and the cover member 1b, and the main member 1a is provided with a flow path 5 upstream of communicating with the through groove 4.

The strip-like flow ejected from each of the narrow grooves 3 reaches the surface W to be coated as it is, or comes into contact with an adjacent strip-like flow to form a fan-shaped film shape. It is also possible to provide a communication groove 6 that allows the openings of the above to communicate with each other, and thereby to eject in a fan-shaped film shape.

As shown in FIG. 3, a pressurized paint supply device 8 is connected to the flow path 5 of the nozzle device 1 through a pipe 7, and the nozzle device 1 is mounted on an injection gun. Attached to a robot hand (neither of which is shown), and the viscosity from the pressure paint supply device 8 to the nozzle device 1 is 2500.
For example, polyvinyl chloride paint or acrylic emulsion paint or sealer material of about 0 to 130,000 centipoise is supplied at a rate of, for example, 30 to 50 kg / cm ² , whereby individual stripes are formed as fan-shaped stripes from each pore. While spraying the paint flow in a radially defined state, moving to the side perpendicular to the fan-shaped surface of the spray flow while maintaining a distance of about 50 to 100 mm with respect to the surface W to be coated. Thus, the strip-shaped coating film F is formed on the surface W to be coated.

The polyvinyl chloride paint, the acrylic emulsion paint or the sealer material not only have different components and properties depending on their manufacturers or specifications, but also have different injection flow conditions depending on use conditions, that is, paint temperature and use environment. Above all, it is natural that one type of nozzle device 1 cannot be used for all kinds of paints. Therefore, in order to obtain a desired jet flow, the shape of the jet outlet 2 itself in the nozzle device 1 or It is appropriate to compensate the distortion of the jet flow by changing the distribution, and therefore the narrow grooves 3 for forming the jet outlets 2 are not evenly spaced apart from each other, and as shown in FIG. Gradually set sparsely,
Alternatively, as shown in FIG. 4B, the distribution area of the narrow groove 3 may be gradually reduced toward both ends while keeping the mutual intervals even.

In forming the ejection port 2 of the nozzle device 1, as shown in FIGS. 5 (a) to 5 (f), a nozzle member having a large number of narrow grooves 3 radially (fan-shaped) engraved on its inner surface. It may be configured as a slit nozzle of a split type in which is used on at least one side.

In FIG. 5 (a), a remarkably shallow fan-shaped shallow groove 3a is formed on the contact surface of the main member 1a, and at the contact surface of the cover member 1b, as shown in FIGS.
A large number of narrow grooves 3 similar to those in the above embodiment are engraved in a vertical direction so as to be slightly divergent from each other, and by the contact between the fan-shaped shallow grooves 3a in the main member 1a and the narrow grooves 3 in the cover member 1b. The combined gap forms a slit 9 in which a large number of grooves 3 are radially (fan-shaped) engraved on one inner surface.

In FIG. 5 (b), a remarkably shallow fan-shaped shallow groove 3a is formed in the cover member 1b while keeping the facing surface of the main member 1a flat, and the shallow groove 3a is further provided with the above-mentioned FIG. A large number of small grooves 3 similar to those in the embodiment of FIG. 2 are engraved in a vertical direction so as to be slightly divergent from each other, and the cover member 1b is composed of a shallow groove 3a and a large number of radial small grooves 3 and a main groove. With the flat facing surface of the member 1a,
A large number of narrow grooves 3 are formed in one inner surface to form slits 9 radially (fan-shaped).

Regarding the distribution of the radial thin grooves 3 in the embodiment shown in FIGS. 5 (a) and 5 (b), the mutual intervals are not uniform, and they are gradually sparsely provided toward both ends as shown in FIG. 5 (c). Alternatively, as shown in FIG. 5D, the flow area of the narrow groove 3 may be gradually reduced toward both ends while keeping the mutual intervals even.

Further, as shown in FIGS. 5 (e) and 5 (f),
The fan-shaped shallow groove 3a provided in the main member 1a or the cover member 1b may be formed so that the depth thereof is gradually shallower at both ends.

The injection gun equipped with the above-mentioned nozzle device 1 can be attached to a robot hand and applied to various thick film coatings. That is, a so-called side seal which is applied as a protective film on diagonally downward surfaces on both sides of an automobile body. Sealing is applied to the joints of painting and welding of body parts, but typical and suitable applications are vibration control, sound absorption, and sound insulation for the floor, dash, wheel house, floor backside, etc. of automobile bodies. An elastic coating layer having a function is formed by coating, and the robot hand is operated so that the distance between the nozzle device 1 and the surface W to be coated is kept constant in the uneven portion, and When the coating width needs to be expanded or contracted, the distance of the nozzle device 1 to and from the surface W to be coated is separated and contacted, and at the same time, the lateral moving speed is adjusted slowly. In portions which do not fabric to close the jet due to the injection gun.

For example, when the surface W to be coated has a shape as shown in FIG. 6, the injection gun is opened / closed and the robot is opened under the condition that the surface W to be coated is divided into areas A, B, C, D and E. While controlling the movement by the hand according to the program, the paint is jetted from the nozzle device 1 and applied as shown in the lower half of the figure, and the nozzle is approximately inversely proportional to the distance of the nozzle device 1 to the surface W to be coated. By changing the moving speed of the apparatus 1, the thickness of the coating film F can be formed substantially constant.

[0020]

As described above, according to the present invention,
It has the following effects.

Since a large number of pores are radially arranged in a line to eject the high-viscosity liquid, this allows the high-viscosity liquid to be ejected radially under the condition that the directionality of each part is individually regulated. Therefore, the pattern width, which is apt to occur in the case of using a conventional product that ejects a highly viscous liquid from an airless nozzle under high pressure in a film shape, does not occur gradually, and is propelled almost linearly over the entire fan shape, Not only is it easy to form a coating film F having a uniform thickness, but the relationship between the film jet distance, that is, the distance between the surface W to be coated and the jet port 2 of the nozzle device 1 and the pattern width to be applied is simple. The injection distance for obtaining the predetermined pattern width, which is obtained by calculation, can be easily calculated.

A high viscosity liquid is jetted by using a nozzle device 1 having a large number of pores radially arranged in a line or a nozzle device 1 having a slit 9 having a large number of narrow grooves 3 radially arranged in a line. As a result, a wide-angle fan-shaped jet flow can be obtained under a low pressure, and therefore a coating film F layer having a uniform thickness can be easily formed without causing the phenomenon of spreading to both ends by the high-pressure jet.

Pores formed by a large number of fine grooves 3 are formed such that the pitch thereof is gradually sparser at both ends than at the center,
Alternatively, the coating areas F near the ends are made thicker than near the center by forming the distribution areas of the multiple fine grooves 3 gradually smaller at both ends than the center, or by making the thickness of the slit 9 gradually thinner at both ends than the center. When a coating material that tends to be applied is used, the coating film F can be formed with a uniform thickness.

A robot hand is a robot hand that uses a nozzle device 1 in which a large number of pores are radially arranged in a row to eject a high-viscosity liquid or a nozzle device 1 in which a plurality of narrow grooves 3 are radially arranged in a row. The coating width and the coating film F of the coating film F can be adjusted by adjusting the spraying distance to the surface W to be coated, or by adjusting the moving speed. The thickness can be adjusted freely, and therefore, it is possible to easily apply a uniform thickness to the coating surface W of various shapes and the coating surface W having irregularities, which enables vibration damping, sound absorption, sound insulation, and rust prevention. It is possible to efficiently and inexpensively manufacture an automobile body provided with an elastic film layer having such functions.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a nozzle device of the present invention according to an embodiment.

FIG. 2 is a front view showing a main part of the apparatus shown in FIG.

FIG. 3 is a side view of a coating state in which the nozzle device is partially broken away.

FIG. 4 is a front view showing a main part of a nozzle device according to another embodiment.

FIG. 5 is a front view showing a main part of a nozzle device according to still another embodiment.

FIG. 6 is a chart showing a coating procedure for an automobile body.

[Explanation of symbols]

1 nozzle device 1a Main member 1b cover member 2 spout 3 narrow groove 3a shallow groove 9 slits W coated surface F coating

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-8-24766 (JP, A) JP-A-10-174905 (JP, A) JP-A-8-224503 (JP, A) JP-A-58- 223461 (JP, A) Actual development 51-54160 (JP, U) Actual development 58-151461 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B05B 1/14 B05C 5 / 00 B05D 1/02 B05D 5/00 B05D 7/14

Claims (6)

(57) [Claims] 1. A thick coating jet nozzle in which a large number of pores are radially provided in a line to jet a high-viscosity liquid in a fan shape.
The number of pores in the above
A thick coating injection nozzle device, characterized in that it is formed in a state in which it gradually becomes sparse at the end . 2. A large number of fine grooves are radially engraved on the inner surface.
Two split fan-shaped thick coating for the injection nozzle device, characterized in that provided a high viscosity liquid slit so as to eject a fan shape for at least using one side of the nozzle member. 3. A plurality of fine grooves provided in a nozzle member are
3. The thick coating spray nozzle device according to claim 2, wherein the switch is formed so as to become gradually sparser at both ends than at the center . 4. A plurality of fine grooves provided in a nozzle member
Passing area has been for thick coating injection nozzle device according to claim 2, characterized in that it has gradually small fence formed at both ends than at the center. 5. A nozzle device according to any one of claims 1 to 4 is mounted.
The spray gun as well as to move Ri by the robot hand has, the method of coating a high-viscosity liquid, characterized in that so as to injection while adjusting the injection distance to the surface to be coated. 6. Damping and absorbing by applying the coating method according to claim 5.
Sound, sound insulation, automotive bodies, characterized in that formed by applying an elastic coating layer having a Sukunakutomoizu Re of the anticorrosive function.