KR20210058390A - The blast apparatus - Google Patents

Abstract

The present invention comprises: a tank containing an abrasive; an abrasive supply unit for supplying an abrasive by rotation of a screw; and an air spraying unit that sprays the abrasive supplied by the screw by high-pressure air through a nozzle, thereby stably spraying a uniform amount of abrasive.

Description

Blast device {THE BLAST APPARATUS}

The present invention relates to a blasting apparatus, and more particularly, to a blasting apparatus capable of stably supplying a certain amount of abrasive.

According to the prior art, a constant pressure is applied to the pressurized tank through a direct pressure valve (air compressor). Thereby, the abrasive material contained in the pressure tank is pressurized. The pressurized abrasive is sprayed with high-pressure air through the outlet of the pressurized tank. At this time, the abrasive is introduced into the injection pipe through the introduction hole of the injection pipe of the high-pressure air.

According to this, a direct pressure valve (air compressor) for applying pressure to the pressurized tank is required. In addition, the tank should also have a structure that has airtightness for pressurization. In addition, when the direct pressure valve (air compressor) does not operate normally, it is difficult to supply normally through the introduction hole formed in the injection pipe. That is, there is a problem in that the surface treatment of the workpiece is not uniform because the amount of the abrasive is not supplied.

An embodiment of the present invention is to provide a blasting apparatus capable of supplying a predetermined amount of abrasives in a constant and stable manner.

In order to achieve the above object, the blasting apparatus according to an embodiment of the present invention includes a tank for accommodating an abrasive, an abrasive supplying part for supplying an abrasive with rotation of a screw, and an abrasive supplied by a screw through a nozzle. It includes an air injection unit for injecting with high-pressure air.

In addition, the air injection unit is connected to the air compressor, the air compressor and the nozzle, the injection pipe disposed at the lower part of the tank, and a transfer pipe that connects the injection pipe and the outlet of the abrasive supply unit, and guides the abrasive material from the abrasive supply unit to the injection pipe It characterized in that it comprises a.

In addition, the screw is characterized in that it is disposed on the top of the injection pipe.

In addition, it characterized in that it further comprises a vibration generating unit connected to the tank.

In addition, it characterized in that it further comprises an abrasive sorting unit for sorting the used abrasives sprayed toward the surface of the workpiece from the nozzle.

In addition, the abrasive sorting unit includes a sorting tank having an inlet of an abrasive used, a first filter disposed inside the sorting tank, having a hole of a first size, a hole of a second size that is in contact with the first filter, and is larger than the first size. And a second filter having a second filter, and a third filter that is spaced apart from the first filter and contacts the second filter, and has a hole of a third size larger than the second size.

In addition, the sorting tank has a bottom surface, a ceiling surface facing the bottom surface, and a side surface disposed between the bottom surface and the ceiling surface, and the first filter is disposed at a first angle with respect to the bottom surface, and the second filter is It is characterized in that it is disposed at a second angle less than the first angle with respect to the bottom surface, and the third filter is disposed at a third angle less than the second angle with respect to the bottom surface.

In addition, at least a part of the end of the first filter not in contact with the second filter is characterized in that it is spaced apart from the side of the sorting tank to define a through hole.

In addition, the abrasive sorting unit is characterized in that it further comprises a blower disposed on the side facing the first filter.

In addition, the rotation shaft of the blower is characterized in that it is arranged at a predetermined angle with respect to the bottom surface.

In addition, the sorting tank is characterized in that it has a first storage unit and a second storage unit partitioned under the first filter to the third filter.

According to the present invention, it is possible to stably supply a predetermined amount of an abrasive material. Since a certain amount of abrasive is sprayed, the surface treatment of the workpiece can be uniform.

The aggregated abrasive is pulverized by forceful screw rotation and separated into the abrasive itself into particle size, so that a certain amount of abrasive in the particle size can be supplied.

It can be reused without defects by selecting used abrasives sprayed from the nozzle.

1 is a schematic diagram of a blasting apparatus according to an embodiment of the present invention.
2 is a schematic view showing an abrasive sorting unit according to an embodiment of the present invention.

Hereinafter, the blasting apparatus 10 according to an embodiment of the present invention will be described in detail.

1 is a schematic diagram of a blasting apparatus 10 according to an embodiment of the present invention.

Referring to FIG. 1, the blasting apparatus 10 according to an embodiment of the present invention includes a tank 100, an abrasive supplying unit 200, an air injection unit 300, and a vibration generating unit 400 in order to constantly supply an abrasive. ). The tank 100 accommodates the abrasive. The abrasive material includes sand and the like. The abrasive supply unit 200 supplies the abrasive to the air injection unit 300. The air injection unit 300 includes a nozzle 310 and supplies high-pressure air to inject the abrasive material through the nozzle 310.

The tank 100 has an outlet (I) of the abrasive. The abrasive material supply unit 200 is disposed at the outlet (I). The outlet I may extend in a direction from the top to the bottom of the tank 100. In one embodiment, the abrasive supply unit 200 includes a screw 210 and a motor 330. The motor 330 rotates the screw 210. The rotation axis of the screw 210 may be disposed in a direction crossing the extending direction of the outlet (I). Accordingly, the abrasive may be transported along the rotation axis of the screw 210 according to the rotation of the screw 210. That is, the abrasive may be transferred in a certain amount according to the rotation of the screw 210.

The air injection unit 300 may further include an air compressor 330, an injection pipe 350, and a transfer pipe 370. The air compressor 330 supplies high-pressure air. The injection pipe 350 connects the air compression 330 and the nozzle 310. The injection pipe 350 is disposed under the screw 210. That is, the screw 210 is disposed above the injection pipe 350. As an example, the extending direction of the injection pipe 350 and the rotation axis of the screw 210 may be arranged side by side. The transfer pipe 370 connects the outlet of the abrasive supply unit 200 and the injection pipe 350. The conveying pipe 270 guides the abrasive conveyed by the screw 210 into the injection pipe 250. Here, due to the difference in position between the screw 210 and the injection pipe 250, the abrasive may fall into and flow into the injection pipe 250.

The sand blasting device 10 according to an embodiment of the present invention further includes a vibration generating unit 400. The vibration generating unit 400 is connected to the tank 100. As an example, the vibration generating unit 400 may be attached to the outer circumferential surface of the tank 100 between the upper and lower ends of the tank 100. The vibration generating unit 400 transmits vibration to the tank 100 to vibrate the aggregated abrasive. Thereby, the aggregated abrasive can be separated into grains. Therefore, it is possible to supply the abrasive material constantly and stably.

2 is a diagram schematically showing an abrasive sorting unit 500 according to an embodiment of the present invention.

Referring to FIG. 2, the abrasive sorting unit 500 selects the used abrasive sprayed from the nozzle 310 toward the surface of the workpiece 11. The used abrasive contains foreign matters such as abrasives and dust broken by a collision due to the surface treatment of the workpiece 11. In the case of broken abrasives, they can be sprayed onto the workpiece and lodged in the workpiece. When a product is produced from such a processed product, it causes damage to the product. In addition, since foreign substances can cause defects in product production, it is necessary to select the abrasives used.

As an example, the abrasive sorting unit 500 has an inlet through which the sprayed used abrasive is introduced and an outlet connected to the tank 100. In addition, the abrasive sorting unit 500 includes a sorting tank 510, a first filter 530, a second filter 550, and a third filter 570. The sorting tank 510 has an inlet through which used abrasives are introduced. The first to third filters 530 to 570 are disposed inside the sorting tank 510.

The first filter 530 extends in one direction. The second filter 550 contacts the end of the first filter 530 and extends in one direction. The third filter 570 contacts the end of the second filter 550 and extends in one direction. That is, the first to third filters 530, 550, and 570 are sequentially disposed along one direction. In addition, the first filter 530 has a hole of a first size through which foreign substances or broken abrasives pass. The second filter 550 has a hole of a second size larger than the first size. The third filter 570 has a hole of a third size larger than the second size. Accordingly, foreign substances having the smallest size among the abrasives used are filtered by the first filter 530. The second filter 550 or the third filter 570 filters out foreign matters that are relatively larger than the size of the foreign matters filtered by the first filter 530.

The sorting tank 510 has a bottom surface (F), a ceiling surface (C) and a side surface (W). The bottom surface F is arranged parallel to the ground. The ceiling surface (C) is disposed above the floor surface (F) parallel to the floor surface (F). The side surface W is disposed between the bottom surface F and the ceiling surface C.

The first filter 530 is disposed at a first angle θ1 with respect to the bottom surface F (with respect to the bottom surface). The second filter 550 is disposed at a second angle θ2 smaller than the first angle θ1 with respect to the bottom surface F. The third filter 570 is disposed at a third angle θ3 that is smaller than the second angle θ2 with respect to the bottom surface F.

Accordingly, abrasives and foreign substances having a relatively large size may be rapidly rolled and moved on the first to third filters 530, 550, and 570. In addition, since the inclination (angle) of the first to third filters 530, 550, and 570 gradually decreases, the moving speed of the abrasive and foreign matters is gradually reduced, so that the accuracy of sorting according to the size may be improved.

As an example, the first angle θ1 may be equal to or greater than the sum of the second angle θ2 and the third angle θ3. That is, the first filter 530 has a relatively steep slope than the second filter 550 and the third filter 570. Since the first filter 530 filters particles having a very small size, an abrasive material having a relatively large particle size may quickly move on the first filter 530. Accordingly, filtering in the first filter 530 can be performed quickly.

Meanwhile, in the first filter 530, at least some of the ends of the first filter 530 that do not contact the second filter 550 are spaced apart from the side W of the sorting tank 510. Thereby, the through hole H is defined (formed) between the first filter 530 and the side surface W. In addition, the abrasive sorting unit 500 further includes a blower 590 disposed on the side W facing the first filter 530. The blower 590 blows air toward the first filter 530. By the blowing of the blower 590, the small-sized particles are moved to the side W of the first filter 530 and fall to the lower portion of the sorting tank 510 through the through hole H. The inlet of the used abrasive formed in the sorting tank 510 is disposed between the through hole H and the second filter 550. As a result, the abrasive material or the like that has fallen from the inlet does not fall into the through hole H.

Meanwhile, the rotation axis of the blower 590 is disposed at a predetermined angle θ with respect to the bottom surface F. Specifically, the rotational shaft of the blower 590 may be disposed to pass between the upper end of the first filter 530 and the inlet of the sorting tank 510. Accordingly, the blown by the blower 590 may be directed to the upper portion of the first filter 530. Accordingly, small particles of foreign matter may be effectively separated and dropped into the through hole H.

The sorting tank 510 includes a partition plate 512 disposed below the first to third filters 530, 550 and 570. The partition plate 512 separates the lower spaces of the first to third filters 530, 550, and 570. That is, the sorting tank 510 has a first storage unit 511 and a second storage unit 513 by the partition plate 512. The second storage unit 513 accommodates broken abrasives or foreign matters that have fallen through the first to third filters 530 and through holes H. The first storage unit 511 accommodates the abrasive material in a good state dropped from the end of the third filter 530. To this end, the end of the third filter 530 may be disposed between the second storage unit 513 and the side surface W. The abrasive material accommodated in the first storage unit 511 may be provided to the tank 100 again.

Meanwhile, a sealing member (not shown) may be further shown on the outer circumferential surface of the screw 210. The sealing member can prevent reverse flow to the transfer pipe 370 and the outlet I by the high-pressure air. The sealing member may have a ring shape extending along the circumferential direction of the rotation axis of the screw 210.

Although the invention made by the present inventor has been described in detail according to the above embodiment, the invention is not limited to the above embodiment, and it goes without saying that the invention can be changed in various ways without departing from the gist of the invention.

10: blast device
11: workpiece
100: tank
200: abrasive material supply unit
210: screw
230: motor
300: air injection unit
310: nozzle
330: air compressor
350: injection pipe
370: transfer pipe
400: vibration generating unit
500: abrasive material sorting unit
510: sorting tank
530: first filter
550: second filter
570: third filter
590: blower
I: tank outlet

Claims (10)

A tank containing an abrasive material;
An abrasive material supply unit for supplying an abrasive material by rotation of the screw; And
A blasting device comprising an air injection unit for injecting an abrasive material supplied by a screw with high-pressure air through a nozzle. The method of claim 1,
The air injection part,
Air compressor;
An injection pipe connected to the air compressor and the nozzle and disposed under the tank; And
A blasting device comprising a transfer pipe connecting the injection pipe and the outlet of the abrasive supply unit and guiding the abrasive material from the abrasive supply unit to the injection pipe. The method of claim 1,
Blast device further comprising a vibration generating unit connected to the tank. The method of claim 1,
A blast apparatus further comprising an abrasive sorting unit for sorting used abrasives sprayed from the nozzle toward the surface of the workpiece. The method of claim 4,
The abrasive sorting unit,
A sorting tank having an inlet of a used abrasive;
A first filter disposed inside the sorting tank and having a hole of a first size;
A second filter contacting the first filter and having a hole of a second size larger than the first size; And
A blast apparatus comprising a third filter spaced apart from the first filter to contact the second filter, and having a hole of a third size larger than the second size. The method of claim 5,
The sorting tank has a bottom surface, a ceiling surface facing the bottom surface, and a side surface disposed between the bottom surface and the ceiling surface,
The first filter is disposed at a first angle with respect to the bottom surface,
The second filter is disposed at a second angle less than the first angle with respect to the bottom surface,
The third filter is placed at a third angle less than the second angle with respect to the bottom surface. The method of claim 6,
At least a portion of the end of the first filter not in contact with the second filter is spaced apart from the side of the sorting tank to define a through hole. The method of claim 6,
A blasting apparatus further comprising a blower disposed on the side facing the first filter in the abrasive sorting unit. The method of claim 8,
A blasting device in which the rotation axis of the blower is disposed at a predetermined angle with respect to the floor surface. The method of claim 5,
The sorting tank is a blast apparatus having a first storage unit and a second storage unit partitioned below the first filter to the third filter.

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