JP2983264B2 - Nozzle for painting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a shape having an opening on one surface in a longitudinal direction, such as an H shape, a groove shape, a lip groove shape or a hat shape. The present invention relates to a nozzle used for applying an air spray coating to the inner peripheral surface of the semi-hollow shaped material.

[Conventional technology]

For example, in the case of the above-mentioned semi-hollow shaped material used for window frames for automobiles or furniture, or in-vehicle accessories for automobiles, for example, a glass plate or a cable or the like is fitted with a rolling guide member in a groove of the shaped material. In many cases, they are directly slid so as to slide. In such a case, it is required to apply a coating on the inner peripheral surface of the semi-hollow profile to improve the slip.

Therefore, the surface to be coated is the inner peripheral surface of the groove, especially the lip groove type, so the conventionally used flat spray air spray gun cannot be used, and the round spray air spray gun An attempt was made to paint using As shown in FIG. 4, depending on the shape to be processed, grooves 2 and 3 communicating with each other in two upper and lower stages are formed in the semi-hollow shape member 1, and the upper groove 2 is formed. If it is necessary to apply paint only to the inner peripheral surface of
As shown in the drawing, a nozzle 4 to be attached to the tip of a round-blowing air spray gun is formed by a tube, an injection port 5 is provided on the tip surface, and the pipe is curved in the lateral direction. Is applied so as to face the side wall of the upper groove 3.

[Problems to be solved by the invention]

However, as is well known, when painting with a round-blowing air spray gun, it is necessary to provide an appropriate gap between the tip of the nozzle and the surface to be coated. Because it is intended to be painted, it is very narrow and can not maintain the normal interval, as a result, the thickness of the coating film becomes uneven, so even if you try to change the spray pressure and other coating conditions variously However, it was extremely difficult to finish the surface evenly.

The present invention has been made in view of the above circumstances, and has studied and developed means for finishing an inner peripheral surface of a profile with a smooth surface by an air spray coating method.

[Means for solving the problem]

The gist of the solution according to the present invention is such that air and paint are sprayed radially over a plurality of layers from the outer periphery of the tip of the nozzle. Accordingly, the nozzle is formed by a tube body having a closed end opening, and at least two rows of injection holes in which a plurality of holes are formed at intervals in the circumferential direction are provided on the outer periphery of the front end portion of the tube body. In addition, the holes in each row are staggered from each other, and the area of the holes in the row becomes smaller as the row reaches the tip of the tubular body.

[Action]

By the way, tentatively, an experiment was conducted in which a single layer of holes was used to radially inject, but the jetting power was still strong and the surface could not be finished to a smooth surface. Due to the conditions of the reduced area, even if the air pressure supplied to the air spray gun is the conventional required pressure, the spraying power is reduced, and moreover, a predetermined amount of paint is spread radially at the tip of the nozzle. Since the injection is performed, the inner peripheral surface of the groove in the profile can be painted and finished at once with a smooth surface.

〔Example〕

Specifically, the nozzle according to the present invention will be described. As shown in FIGS. 1 and 5, a tube 8 having a closed end opening is formed at the end of a cap 7 attached to the end of an air spray gun 6. A plurality of holes 9 are bored at equal intervals in the circumferential direction on the outer peripheral surface of the distal end portion of the tube body 8, and the plurality of holes 9 drilled in the circumferential direction As
The injection rows 10 are provided at least over two rows. And second
As shown in FIGS. 3 and 3 in an enlarged manner, the hole 9 of the injection port array 10 reaching the tip of the tube 8 is formed so that the opening area thereof is smaller than that of the hole 9 on the base side. . Further, the holes 9 of the two adjacent injection port arrays 10 and 10 are formed so as to be staggered. Note that the number of rows of the injection port rows 10 is determined by the size of each hole 9, but usually two rows are sufficient. Further, a guide 11 made of a synthetic resin material or other material having good lubricity is attached to the tube 8 so as to be detachably attached thereto, and paint is applied over the entire surface of the semi-hollow shaped member 1 to be coated. The injection position is set so as to be kept constant. The illustrated guide 11 is provided with inclined surfaces at both ends of a rectangular body, and may be formed in the most appropriate form according to the member to be coated.

Therefore, as shown in FIG. 5, the nozzle according to the present invention is attached to the air spray gun 6, and the nozzle is inserted into the groove 2 of the semi-hollow shaped member 1 to perform the coating operation. Even if it is supplied and atomized,
The fact that 10 is provided over a plurality of rows, the area of each hole 9 is different for each row, and that the holes 9 are staggered reduce the injection force from each hole, and furthermore, each hole 9 Injecting radially with almost the same arrival length of the injection, the overall injection state presents a disk-like state, even if the coating is applied once or several times, the coating always has a smooth surface. This is to be finished on the film 12 surface. In addition, if the guide 11 is attached, the spraying position is fixed to the entire length in the longitudinal direction of the profile, and a stable coating film can be finished because of its stability.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to the coating nozzle by this invention, it is comprised so that the differential air and paint may be sprayed radially over a multilayer from the outer periphery of the front-end | tip part of a pipe, and may be sprayed like drawing a disk. Therefore, the inner surface of the narrow groove of the profile can be surely finished to a smooth surface required for the function.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a coating nozzle according to the present invention, and FIG.
3 and 4 are sectional views showing the arrangement and size of the holes formed in the nozzle, FIG. 4 is a sectional view showing an example of a profile to be coated, and FIG. 5 shows the state of the coating operation. FIG. 6 is a perspective view showing a conventionally used coating nozzle. 1 ... Shape, 6 ... Air spray gun 7 ... Cap, 8 ... Tube, 9 ... Hole 10 ... Injection row, 11 ... Guide, 12 ... Coating

Claims (1)

(57) [Claims] 1. An injection port comprising a tube (8) having a closed end opening, and a plurality of holes (9) formed in the outer periphery of the end of the tube (8) at circumferential intervals. The rows (10) are provided in at least two rows, and the holes (9) in each row are staggered from each other, and the area of the holes (9) in the row becomes smaller as the row reaches the tip of the tubular body (8). Coating nozzle characterized by being provided so that