JP3090149U - Spray gun for sandblasting - Google Patents

Abstract

(57) Abstract: A mixing tank (3) is provided so as to surround a nozzle (1) for discharging compressed air. An injection port 3A for jetting an abrasive is provided in the direction of the tip of the nozzle 1 of the mixing tank 3. The abrasive Q is filled below the position of the injection port 3A in the mixing tank 3. A suction port 2 for sucking the abrasive Q into the nozzle 1 is provided above the nozzle 1. The mixing tank 3 includes a side wall 3D, a tapered surface 3C, and an injection surface 3B provided with an injection port 3A. Inlet 2 is nozzle 1
It has a cylindrical shape erected at the upper part of the side. [Effect] A small amount of abrasive can be effectively jetted without lowering the pressure of compressed air. An abrasive Q in an amount suitable for decorative processing using a stencil or the like is sprayed.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a spray gun for sandblasting, which is capable of spraying a minimum required amount of abrasive when spraying a sand-like abrasive onto a workpiece such as glass to perform surface decoration or the like.

[0002]

[Prior art]

 Conventionally, as this type of sandblast gun, a blast gun described in Japanese Patent Application Laid-Open No. 7-276241, a spray gun for sandblast described in Japanese Patent Application Laid-Open No. 2000-117638, and the like have been proposed.

[0003] The former blast gun is provided with a large cabinet capable of accommodating from small parts to large workpieces with the purpose of simplifying the collection and replacement of abrasives, and the blast gun is used inside the cabinet. Is what you do. When the compressed air sent from the compressor is jetted from the nozzle tip of the blast gun, the abrasive is sucked by the negative pressure generated in the negative pressure chamber inside the blast gun, and the compressed air and the abrasive are ejected from the injection nozzle. They are injected together.

On the other hand, the latter spray gun for sandblasting is a type in which a stencil can be repeatedly used. A double sand cylinder covered with an outer cylinder is attached to the tip of a nozzle, and the stencil is attached to the tip of the outer cylinder. Attach the base at an interval and attach a stencil to this base. The abrasive sprayed from the nozzle is provided so as to be sucked from a suction passage between the outer cylinder and the sand cylinder.

[0005]

[Problems to be solved by the invention]

 All conventional spray guns for sand blasting prevent abrasives from being scattered to the surroundings after being sprayed, and all of the spray guns were sucked by the negative pressure generated in the negative pressure chamber inside the blast gun. The abrasive is ejected from the injection nozzle.

However, the amount of the abrasive sprayed from the spray gun varies depending on the purpose of use. For example, a large amount of abrasive is required to remove rust on the metal surface, but a small amount of abrasive can be used to decorate the glass surface with characters and designs. . In particular, when performing decorative processing by applying a mold such as a stencil, only the opening formed in this mold is processed, so if the abrasive can be sprayed efficiently, it is possible to process even a small amount of abrasive. it can.

[0007] However, as described above, the conventional spray gun processes the abrasive after spraying, and cannot adjust the spray amount. Although it is possible to adjust the amount of abrasive to be sucked by adjusting the amount of compressed air sent from the compressor, in this case, the pressure of the compressed air also decreases, so that the abrasive has sufficient impact force. Can not be obtained. Therefore, the adjustment of the compressed air in the conventional spray gun is used to adjust to the strongest ejection power, and cannot be adjusted so as to effectively eject a small amount of abrasive.

Therefore, the present invention has been devised to solve the above-mentioned problem, and it is possible to effectively spray a small amount of abrasive without lowering the pressure of compressed air, and to use a stencil or the like. An object of the present invention is to provide a spray gun for sandblasting suitable for decorative processing.

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a first means of the present invention is a sandblasting spray gun in which an abrasive Q is sprayed by the compressed air of an air compressor P in a sandblasting gun for mixing around a nozzle 1 for discharging compressed air. A tank 3 is provided, and an injection port 3A for injecting an abrasive is provided in the direction of the tip of the nozzle 1 of the mixing tank 3. The abrasive Q is filled below the position of the nozzle 1 in the mixing tank 3, and the polishing is performed. The suction port 2 for sucking the agent Q into the nozzle 1 is provided above the nozzle 1.

The mixing tank 3 in the second means includes a bottomed cylindrical side wall 3D surrounding the side surface of the nozzle 1, and a tapered surface 3 constricted in the direction of spraying the abrasive Q from the open end of the side wall 3D. C, and a spray surface 3B provided with a spray port 3A for spraying the abrasive Q positioned in the direction of the tip of the nozzle 1.

The suction port 2 in the third means is a means for solving the problem in that the suction port 2 has a cylindrical shape provided upright on the upper side surface of the nozzle 1.

[0012]

[Embodiment of the invention]

 Hereinafter, embodiments of the spray gun for sandblasting of the present invention will be described with reference to the drawings.

Reference numeral 1 shown in the figure is a nozzle of a spray gun for sandblasting (see FIG. 1). When the compressed air of the air compressor P is injected from the nozzle 1, the abrasive Q filled in the mixing tank 3 is simultaneously injected.

The mixing tank 3 is provided with the mixing tank 3 so as to surround the nozzle 1. In the illustrated example, the mixing tank 3 includes an injection surface 3B, a tapered surface 3C, and a side wall 3D. The spray surface 3B is located in the direction of the tip of the nozzle 1 and is provided with a spray port 3A for spraying the abrasive Q. The abrasive Q is injected from the injection port 3A. At this time, in order to engrave fine characters and patterns on the side of the glass using a stencil or the like, pinpoint processing can be performed by providing the injection port 3A having a diameter of about 3 mm. On the other hand, the side wall portion 3D has a bottomed cylindrical shape surrounding the side surface of the nozzle 1, and is provided with a tapered surface portion 3C tapered in the abrasive Q spraying direction from the open end of the side wall portion 3D. Further, the shape of the mixing tank 3 is not limited to the illustrated example, and the shape can be freely changed as long as a suitable abrasive Q can be injected from the injection port 3A.

An abrasive Q is filled below the position of the injection port 3 A in the mixing tank 3. A suction port 2 for sucking the abrasive Q into the nozzle 1 is provided above the nozzle 1. In the illustrated example, a detachable nozzle 1 is provided at the tip of the nozzle R1 of the existing spray gun R, and the nozzle 1 is mounted on the tip of the nozzle R1 of the existing spray gun R together with the mixing tank 3. (See FIG. 2). Further, the illustrated suction port 2 has a cylindrical shape whose upper end is open (see FIG. 1). By providing the suction port 2 in this way, it is easy to mount the nozzle 2 on the nozzle R1 of the existing spray gun R. Further, a suction port 2 having a side surface of the nozzle 1 opened may be used. In addition, the nozzle 1 and the mixing tank 3 can be freely selected to be provided integrally or separately.

When the compressed air sent from the air compressor P to the nozzle 1 is injected from the injection port 3 A of the mixing tank 3, the inside of the mixing tank 3 becomes a negative pressure, and the abrasive material wound up inside the mixing tank 3 Q is sucked into the nozzle 1 from the suction port 2. The abrasive Q sucked into the nozzle 1 is injected together with compressed air from the injection port 3A.

[0017]

[Effect of the invention]

 The present invention has achieved the original object by being configured as described above.

That is, a mixing tank 3 surrounding the periphery of the nozzle 1 for discharging the compressed air is provided, and an injection port 3A for injecting the abrasive toward the tip of the nozzle 1 of the mixing tank 3 is provided. The abrasive Q is filled below the position of the injection port 3A in the nozzle 3 and the suction port 2 for sucking the abrasive Q into the nozzle 1 is provided above the nozzle 1, so that the pressure of the compressed air is reduced. It has become possible to effectively spray a small amount of abrasive without the need. As a result, the amount of the abrasive Q can be adjusted to an amount suitable for decorative processing using, for example, a stencil.

Moreover, since decorative processing can be performed with a small amount of the polishing material Q, the amount of the polishing material Q scattered around after the processing is reduced, and the environment of the workplace is not deteriorated even if a special recovery device is not easy. Can be decorated.

The mixing tank 3 includes a bottomed cylindrical side wall 3D surrounding the side surface of the nozzle 1, a tapered surface portion 3C narrowing in an abrasive Q spraying direction from an open end of the side wall 3D, 1 and an injection surface 3B provided with an injection port 3A for injecting the abrasive material Q, which is easy to handle during operation and can be used safely.

Furthermore, the suction port 2 has a very simple structure because it has a cylindrical shape standing upright on the upper side of the nozzle 1 and can be provided at low cost. It is also possible to attach.

As described above, according to the present invention, it is possible to effectively spray a small amount of abrasive without lowering the pressure of the compressed air, and to spray an amount of abrasive suitable for decorative processing using a stencil or the like. It has practically useful effects such as being able to do so.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of a spray gun of the present invention.

FIG. 2 is a side view showing a use state of the spray gun according to the present invention.

[Explanation of symbols]

 P Air compressor Q Abrasive R Spray gun R1 Nozzle 1 Nozzle 2 Suction port 3 Mixing tank 3A Injection port 3B Injection surface 3C Taper surface

Claims (3)

[Utility model registration claims] 1. A sandblasting spray gun in which an abrasive is sprayed by compressed air from an air compressor. An injection port for injecting a material is provided, an abrasive is filled below the position of the injection port in the mixing tank, and an intake port for sucking the abrasive into the nozzle is provided at an upper portion of the nozzle. Spray gun for sand blasting. 2. The mixing tank according to claim 1, wherein the mixing tank has a bottomed cylindrical side wall surrounding the side surface of the nozzle, a tapered surface portion narrowed in an abrasive spray direction from an opening end of the side wall portion, and a position in a tip direction of the nozzle. 2. A spray gun for sandblasting according to claim 1, further comprising: a spray surface portion provided with a spray port for spraying the abrasive. 3. The spray gun for sand blast according to claim 1, wherein the suction port has a cylindrical shape provided upright on an upper portion of a side surface of the nozzle.