JP2002346931A - Abrasive material supplying method and device in sand blast processing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably supply a fixed amount of abrasive material into an abrasive material injection nozzle, and to accurately set up the injection amount of the abrasive material suitable for processing, regardless of changed in pressure within an abrasive material supplying device, change in a state such as the humidity or grain size of the abrasive material, and using time. SOLUTION: An abrasive material layer 12 provided so as to contact with a part of a circumference of an abrasive material supplying roller 16 formed with recessed portions such as a groove and a hole on a circumference of a column and supply abrasive material from an upper part of the abrasive material supplying roller, a high pressure gas layer 14 supplying high pressure gas, and a low pressure layer 15 having a gas pressure lower than that of the high pressure gas layer are provided. By a flow of air flowing from a high pressure layer 18 to the low pressure layer 15 and in parallel with the circumference of the abrasive material supplying roller, the abrasive material in the abrasive material supplying roller recessed portion 11 is blown off and removed, thereby enabling stable supply of the abrasive material into the abrasive material injection nozzle regardless of change in the state of the abrasive material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direct pressure blasting method in which an abrasive in a pressure vessel containing an abrasive is supplied to an abrasive injection nozzle by a high pressure gas and is injected from the nozzle in sand blasting. By supplying a certain amount of material uniformly to the abrasive spray nozzle 20 and easily adjusting the spray amount, it is possible to stably spray the optimum spray amount in sandblasting, and to achieve efficient and stable sandblasting. Abrasive material in the abrasive material tank is quantitatively applied to the abrasive material spray nozzle 2 to realize
The present invention relates to a method and an apparatus for supplying an abrasive material for supplying an abrasive material.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, an abrasive supply apparatus used in a direct pressure blast apparatus has an abrasive pressure tank 22 installed below an abrasive tank 21 installed below a classifier 32. Then, an abrasive adjustment pipe 42 having an abrasive introduction hole is provided below the abrasive pressure tank, and the abrasive adjustment pipe 42 is connected to the abrasive spray nozzle 20 through the abrasive supply pipe 28.

[0003] The abrasive is supplied from the sandblasting device main body 31, and the supplied abrasive enters the cyclone 32 from the sandblasting device main body 31 through the main body conduit 34 by the negative pressure of the dust collector 35, and from the abrasive material tank 21 below the cyclone 32. The abrasive is supplied to the abrasive pressure tank 22.

After the abrasive is supplied to the abrasive pressure tank 22, the abrasive supply valve 24 is closed to pressurize the interior of the abrasive pressure tank 22. Abrasive material is supplied from the abrasive material introduction hole 43, and passes through the abrasive material supply pipe 28.
More abrasive is injected with the high pressure gas.

The amount of the abrasive is adjusted by adjusting the diameter of the abrasive introduction hole and the air amount of the abrasive adjusting air 19.
If the air amount of the abrasive adjusting air 19 increases, the abrasive hardly enters the abrasive adjusting pipe 42, and the abrasive injection amount decreases.

However, in this method, the abrasive injection amount is adjusted by adjusting the diameter of the abrasive introduction hole 43 and the abrasive adjustment air 19.
Therefore, the injection amount changes depending on the amount of the abrasive in the abrasive pressure tank 22, and it is impossible to adjust the abrasive injection amount with high accuracy.

[0007] For this reason, Japanese Patent Laid-Open No. 2000-2000 shown in FIG.
An abrasive supply device described in Japanese Patent No. 326230 is manufactured.

In this abrasive supply apparatus, the abrasive 5 is supplied from an abrasive pressure tank 21 through an introduction pipe 51 to an abrasive amount adjusting tank 53, and a collecting rotary plate 52 in the abrasive amount adjusting tank 53 is provided. Is rotated, the abrasive 5 enters the groove formed in the collecting rotary plate 52, and the abrasive in the groove is supplied from the pressure feed port 56 close to the collecting rotary plate 52 into the abrasive amount adjusting tank 53. By supplying the abrasive to the abrasive supply pipe 28 by pressure and supplying the abrasive to the abrasive injection nozzle 20, a predetermined amount of abrasive is injected from the abrasive injection nozzle 20 to perform blast processing.

By using this abrasive supply device, an arbitrary injection amount is injected from the abrasive injection nozzle 20 by changing the number of rotations of the collecting rotary plate 52 in the abrasive amount adjustment tank 53. It became possible.

[0010]

SUMMARY OF THE INVENTION
In the fixed-quantity supply device described in the publication No. 00-326230, the height of the abrasive layer surface 48 in the abrasive amount adjusting tank 53 is determined by the position of the abrasive introduction port 54 of the introduction pipe 51, and the height of the abrasive layer surface 48 is determined. If the height is high, a large amount of abrasive is loaded on the collecting rotary disk 52, and the amount of abrasive supplied increases. If the height of the abrasive layer is low, the abrasive is difficult to enter the grooves of the collecting rotary disk 52, and the amount of abrasive supplied. Therefore, it is necessary to keep the height of the abrasive layer surface 48 constant.

When a high-pressure gas is supplied into the abrasive amount adjusting tank and the abrasive pressure tank, and the powder is injected from the powder injection nozzle 20, the gas pressure in the powder injection device 26 increases.
When the supply of the high-pressure gas to the abrasive amount adjusting tank 53 and the abrasive pressure tank 22 is stopped, and the injection from the abrasive injection nozzle is stopped, the pressure in the abrasive amount adjusting tank 53 and the inside of the abrasive tank 22 decreases, Therefore, the gas in the abrasive material expands, and the expanded gas causes the gas to blow up and cause a fluidization phenomenon, and the height of the abrasive material layer surface 48 changes every time the injection and stop of the abrasive material are repeated, so that the stable injection is performed. There was a problem that could not be done.

[0012] Further, the humidity in the abrasive and the dust generated by shaving the processed substrate by blasting during the blasting partially enter the abrasive, and the change in the amount of the dust causes the fluidity of the abrasive to change. And the position of the abrasive introduction port 54 is the same, the height of the abrasive layer surface 48 changes, and the amount of abrasive supplied to the abrasive injection nozzle 20 changes during processing. And there was a problem that stable processing could not be performed.

Further, the abrasive of the collecting rotary disk 52 is supplied to the pressure feeding pipe 5.
When the abrasive is supplied from the pressure feed port 56 of FIG.
Flows along the powder supply roller, and once collides with a pressure feed pipe near the pressure feed port, and is supplied to the abrasive supply pipe 28, so that the pressure feed pipe 57 is worn by the abrasive, and a hole is formed in the pressure feed pipe 57. If a hole is made, the amount of the abrasive supplied from the collecting rotary plate 52 decreases, and the amount of the abrasive sprayed decreases. Therefore, it is necessary to periodically exchange the pressure feed pipe 57.

As described above, in the conventional quantitative supply apparatus, the amount of the abrasive in the abrasive amount adjusting tank 53 changes every time the abrasive is repeatedly ejected and stopped, and the polishing to the abrasive injection nozzle 20 is stopped. As the material supply changes,
The problem of the change in the processing state of the blasting process and the wear of the suction pipe 57 for sucking the abrasive are remarkably observed, and the problem that the suction pipe 57 has a hole due to the wear and the supply amount of the abrasive to the abrasive spray nozzle is reduced. there were.

The present invention has been developed in order to solve the above-mentioned problems. The abrasive injection nozzle is capable of stably supplying the abrasive even when the frequency of abrasive injection and the material, grain size and state of the abrasive change. An object of the present invention is to provide a method and apparatus for supplying an abrasive material which is always stable by supplying the material to the apparatus 20 and minimizing wear of parts in the abrasive supply apparatus.

[0016]

In order to solve the above-mentioned problems, in the abrasive supply apparatus of the present invention, as shown in FIGS. 1 and 2, concave portions such as grooves and holes are formed on the circumference of a roller. The abrasive layer 12 and the high-pressure gas layer 14 to which the high-pressure gas is supplied so that the abrasive 5 is supplied from above the abrasive supply roller 16 so as to be in contact with a part of the circumference of the abrasive supply roller 16. A low-pressure gas layer 15 which is located between the high-pressure gas layer 14 and the abrasive supply pipe connected to the abrasive spray nozzle from the high-pressure gas layer and has a lower gas pressure than the high-pressure gas;
The high-pressure gas layer 14 and the low-pressure gas layer 15 are electrically connected by a gas introduction part 19 formed by a gap between the gap adjusting plate 18 provided in parallel with the abrasive supply roller 16 and the abrasive supply roller 16. By rotating the roller 16, the powder supply roller recess 1 is formed in the powder layer 12.
After the powder has been filled in 1, the abrasive 5 in the abrasive supply roller recess 11 is blown off by the gas flow in the gas introduction unit 19 flowing in parallel with the abrasive supply roller 16, thereby filling the abrasive supply roller recess 11. Take out the abrasive,
Thereafter, the abrasive was collected at the abrasive collecting port 17 having a larger cross-sectional area than the gap of the gas introduction part 19, and the abrasive was stably supplied to the abrasive spray nozzle 20 via the abrasive supply pipe 28.

Since the abrasive is supplied to the abrasive layer 12 from above the powder supply roller 16, there is no change in the contact area between the abrasive supply roller 16 and the abrasive due to a change in the height of the surface of the abrasive layer. Even if the supply amount of the abrasive is changed due to a change in the flowability of the abrasive or a change in the state of the abrasive due to humidity, the amount of the abrasive supplied to the abrasive is not changed, and the abrasive is stably supplied to the abrasive injection nozzle 20. The abrasive is removed from the abrasive supply roller recess 11 by blowing it off by the flow of gas flowing in parallel with the abrasive supply roller 16 and collected by the collection port, so that the abrasive is directly polished. Since there is no portion that collides in the material supply device, the wear caused by the abrasive in the abrasive material supply device is reduced, and the above problem can be solved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the method and apparatus for supplying abrasives according to the present invention will be described below with reference to the drawings.

The blasting device for installing the abrasive supply device used in the present invention has a blasting device main body 3 as shown in FIG.
1 and a classifier 32 such as a cyclone and a dust collector 35, and an abrasive injection nozzle 20 is provided in the blast device main body.

The blasting apparatus main body 31 is connected to a classifier 32 by a main body conduit 34, and the classifier is connected to a dust collector 35 by a dust collecting pipe 39. The blast apparatus main body 31 is operated by a negative pressure from the dust collector 35. It is always in a negative pressure state with respect to the outside air, so that the abrasive injected from the abrasive injection nozzle 20 is not scattered from the blast device main body 31.

The abrasive sprayed from the abrasive spray nozzle 20 with high-pressure gas hits a workpiece and is blasted.
The abrasive flows from the blasting device main body 31 to the classification device 32 by the flow of the air due to the negative pressure generated by the dust collector 35, and cuts the abrasive, the crushed abrasive and the workpiece which can be used by the classification device 32 such as a cyclone. The abrasive that can be used after being separated into dust enters the abrasive tank 21, passes through the abrasive pressure tank 22, is supplied to the abrasive layer 12 of the abrasive supply device 10, and cuts the crushed abrasive and the workpiece. The dust is collected by the dust collector 35.

As shown in FIG. 3, in the abrasive supply device 10, there is an abrasive supply roller 16 in which concave portions such as grooves and holes are formed on the circumference of the roller, and the abrasive supply roller 16 is driven by a motor or the like. Rotated by device.

The shape of the concave portion 11 formed on the circumference of the abrasive supply roller 16 may be any shape such as a vertical groove shape, a horizontal groove shape, a round hole shape, and a screw shape, and may be recessed from the outer periphery of the roller.

An abrasive layer 12, a high-pressure gas layer 14, and a low-pressure gas layer 15 are formed on the circumference of the abrasive supply roller 16 so that the abrasive is supplied from above to the abrasive supply roller. 14 and the low-pressure gas layer 15 are provided with a gap adjusting plate 18 installed in parallel with the abrasive supply roller 16 and a gas introduction portion 19 formed by the abrasive supply roller 16.
Are connected by

Abrasive material tank 2 below cyclone 32
1 and an abrasive pressure tank 22 below the abrasive tank 21
A high-pressure gas is supplied into the abrasive pressure tank 22 and the abrasive supply device 10 while the abrasive is injected from the abrasive injection nozzle 20, so that the abrasive supply valve 24 is always installed at a constant pressure. Since the abrasive supply valve 24 needs to be held,
To prevent the high-pressure gas from leaking, and while the abrasive is not being injected from the abrasive injection nozzle 20, no high-pressure gas is supplied to the abrasive pressure tank 22 and the abrasive supply device 10. The abrasive supply valve 24 is opened to introduce the material from the abrasive supply tank 21 to the abrasive pressure tank 22.

When the abrasive in the abrasive pressure tank 22 is exhausted, it is necessary to stop the injection from the abrasive injection nozzle 20 and introduce the abrasive from the abrasive tank 21 to the abrasive pressure tank 22. If two material pressure tanks 21 and two abrasive material supply valves 22 are provided, and the abrasive material supply valves 22 are alternately opened and closed so that the pressure in the abrasive material pressure tank 22 can be kept constant during the abrasive material supply. Also, the abrasive can be supplied into the abrasive pressure tank 22 while the abrasive is being injected from the abrasive injection nozzle 20, and it is not necessary to stop the injection to supply the abrasive.

Abrasive pressure tank 22 and abrasive supply device 1
0 is connected by the high-pressure gas conduit 23 so that the same pressure is always maintained even during the supply of the high-pressure gas, so that the same pressure can be maintained.

When the abrasive supply roller 16 rotates, the abrasive in the abrasive layer 12 is filled in the abrasive supply roller recess 11, and the filled abrasive 5 is supplied to the gas inlet by the rotation of the abrasive supply roller 16. High-pressure gas layer 14 which has been supplied with high-pressure gas
Then, the abrasive is blown off by the flow of air to the low-pressure gas layer 15, taken out from the abrasive material supply roller concave portion 11, collected at the abrasive material collecting port 17, and supplied to the abrasive injection nozzle 20 together with the high-pressure gas.

In FIG. 3, the abrasive supply roller 16 is transferred from the abrasive layer 12 to the low-pressure gas layer 15 through the high-pressure gas layer 14.
The high pressure gas layer 14 and the low pressure gas layer 15 are turned upside down, and the abrasive supply roller 16 rotates from the abrasive layer 12 to the high pressure gas layer 14 via the low pressure gas layer 15. You may do it.

In this case, the abrasive material is supplied upward from the bottom with the high pressure gas layer 14 with the abrasive material collecting port 17 placed on the upper side.

The force for blowing off the abrasive 5 in the abrasive supply roller 16 is formed by the gap adjustment plate 18 and the abrasive supply roller 16 using the gap adjustment plate 18 installed in parallel with the abrasive supply roller 16. It is changed by adjusting the gap of the gas introduction unit 19 to be performed.

When the gap between the gas introduction portions 18 becomes narrow, the flow of air flowing from the high-pressure gas layer 14 to the low-pressure gas layer 15 becomes faster, so that the abrasive in the abrasive material supply roller concave portion 11 can be easily removed. The flow of air is slowed down, making it difficult to remove the abrasive in the abrasive supply roller recess 11, and the abrasive in the abrasive supply roller recess 11 tends to remain in the recess.

If the abrasive has poor fluidity, such as when the abrasive has a small particle diameter, the abrasive is placed in the powder supply roller recess 11.
Since it becomes difficult to stably inject the slurry, it is not possible to obtain a stable spray. Therefore, a vibrator is attached to the abrasive material supply device 10, the abrasive material tank 21, or the abrasive material pressure tank 22, and the abrasive material supply device 10, the abrasive material tank 21, and the abrasive material pressure tank Is desirably vibrated so that the abrasive is easily supplied to the abrasive supply roller concave portion 11.

The abrasive and the high-pressure gas supplied from the abrasive collecting port 17 of the abrasive supplying device 10 to the abrasive injection nozzle 20 through the abrasive supply pipe 28 such as a hose are injected from the abrasive injection nozzle 20 and blasted. Processing is performed, and the abrasive material is supplied to the hopper 3 of the blast device main body 31 by the negative pressure of the dust collector 35.
3, only the usable abrasive is classified into the classifier 32 through the abrasive tank 21, the supply of the pressure to the abrasive supply device 10 is stopped, and the polishing is stopped again when the injection from the abrasive injection nozzle 20 is stopped. After the abrasive supply valve 24 is opened and the abrasive is supplied to the abrasive pressure tank 22, the abrasive supply valve 24 is closed, the abrasive supply roller is rotated, and the abrasive supply device 10 is pressurized with a high-pressure gas to polish again. The abrasive can be sprayed from the material spray nozzle 20.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the above-described method and apparatus for supplying an abrasive according to the present invention will be specifically described below with reference to the drawings.

In FIG. 8, an abrasive injection nozzle 20 is provided inside the blasting apparatus main body 31 and connected to the abrasive material collecting port 17 of the abrasive supply apparatus 10 by an abrasive hose.

A cyclone 32 is installed at the back of the main body of the blasting apparatus for classification of abrasives. The hopper 33 at the lower part of the main body of the blasting apparatus is connected to the cyclone 32 via a main body conduit 34, and a dust collector 35 is installed at the back of the cyclone. Conduit 39
Connect with.

An abrasive tank 21 is provided below the cyclone, and an abrasive pressure tank is provided below the abrasive tank.
An abrasive supply valve is provided between the abrasive tank and the abrasive pressure tank so that the pressure in the abrasive pressure tank can be maintained, and the abrasive supply device 10 is mounted below the abrasive pressure tank.

The abrasive tank 21 has a vibrator 36
The cyclone 32 and the abrasive tank 21 are connected by a rubber tube 38 so that the abrasive tank 21, the abrasive pressure tank and the abrasive supply device 10 are vibrated so that the vibration is not transmitted to the cyclone 32 and the blast device main body 31. Connected.

As shown in FIG. 3, an abrasive supply roller 16 having a thread-shaped vertical groove formed on the outer periphery of the roller is provided inside the abrasive supply device 10 below the abrasive tank 21 so that the rotation can be changed by an inverter. Then, the abrasive supply roller 16 is rotated by the motor.

On one side of the abrasive supply roller 16, there is provided an abrasive layer 12 connected to an abrasive pressure tank 22 so as to supply the abrasive from above the abrasive supply roller 16, and on the opposite side to the abrasive layer 12. High pressure gas layer 14 and low pressure gas layer 15
The high-pressure gas layer 14 and the low-pressure gas layer 15 are connected by a gap adjusting plate 18 installed in parallel with the abrasive supply roller 16 and a gas introduction portion 19 formed by a gap between the abrasive supply roller 16. The gap between the gas introduction portions 18 is set to 3 mm by the adjustment plate 18.

An abrasive collecting port 17 is provided below the low-pressure gas layer 15, and the abrasive injection nozzle 20 and the abrasive collecting port 17 are connected by an abrasive hose.

By rotating the fan motor of the dust collector 35,
Average particle size 8μm as abrasive from blasting device main body 31
1 kg of the alumina powder is charged, and the abrasive 5 charged is supplied from the hopper 33 of the blasting apparatus main body 31 through the main body conduit 34 to the cyclone 32 by the negative pressure of the dust collector 35, supplied to the abrasive tank 21 and supplied to the abrasive tank 21. The valve 24 is opened and the abrasive is supplied to the abrasive pressure tank 22.
The abrasive layer 12 of the abrasive supply device 10 is filled.

The vibrator 36 attached to the abrasive tank 21 is operated to apply vibration to the abrasive tank 21, the abrasive pressure tank 22, and the abrasive supply device 10.

The abrasive material supply valve 24 is closed, high-pressure air of 0.2 MPa is supplied to the abrasive material supply device 10, and the motor for driving the abrasive material supply roller 16 of the abrasive material supply device 10 is rotated. Adjusting so that about 80 g of the abrasive is sent to the abrasive spray nozzle, the abrasive is sprayed from the abrasive spray nozzle 10 to cut the glass substrate.

The abrasive sprayed from the abrasive spray nozzle 10 passes through the main pipe 34 from the hopper 33 of the blasting device body 31, enters the cyclone 32, is again supplied to the abrasive tank 21, and is supplied from the abrasive spray nozzle 20. After the abrasive injection, the abrasive supply valve 24 is opened and the abrasive pressure tank 2 is opened.
2, the abrasive is supplied to the abrasive supply device 10, the abrasive supply valve 24 is closed again, and the abrasive shared roller 16 is rotated to supply high-pressure air to the abrasive supply device 10 to supply the abrasive. The abrasive is supplied to the injection nozzle 20, and the abrasive is injected again from the abrasive injection nozzle.

[0047]

According to the present invention, the abrasive is put into the concave portion 11 formed on the abrasive supply roller, and the abrasive supply roller 16 is provided.
In the method of supplying a fixed amount of abrasive to the abrasive spray nozzle 20 by rotating the abrasive, the method of burying the roller in the abrasive layer 12 in the conventional abrasive supply apparatus is different from that in processing in the abrasive supply apparatus. The amount of abrasive in the abrasive supply device is liable to change due to changes in the state of the abrasive such as pressure and humidity, and the amount of abrasive supplied also changes. Material supply roller 1
6 so that the powder supply roller 16
Since the abrasive is supplied from above, the area of the abrasive in contact with the powder supply roller 16 is not changed even when the abrasive in the abrasive supply changes and the state of the abrasive such as humidity changes. The change in the amount of abrasive supplied has disappeared.

In the conventional method of collecting the abrasive charged in the concave portion 11 of the abrasive supply roller from the roller, the conventional method of collecting the abrasive by bringing the pressure feed port 56 close to the roller is a method of feeding the abrasive near the pressure feed port 56 by the flow of the abrasive. There was a problem that the abrasive collides with the inside of the pipe 57 and the pumping pipe 57 was worn. However, the flow of air generated by the pressure difference between the low-pressure gas layer 15 and the high-pressure gas layer 14 was caused to flow between the outer circumference of the abrasive supply roller 16 and The abrasive is discharged from the abrasive supply roller 16 by blowing off the abrasive in the abrasive supply roller recess 11 by the flow of the air.
As a result, almost no wear of parts in the abrasive supply device was observed.

In the conventional method of burying the roller in the abrasive supply tank, about 5 kg is stored in the abrasive tank.
It is necessary to put the above abrasive, and if the amount of the abrasive is small, the abrasive does not enter the concave portion 11 of the abrasive supply roller, so that there is a problem that the abrasive can not be supplied in a constant amount. By providing the upper portion on the outer periphery, the abrasive can be sprayed if the abrasive 5 is filled in the abrasive layer 12, and the abrasive can be supplied in a constant amount even with a small amount of abrasive of about 500 g.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a cross section showing an outline of an abrasive supply device of the present invention.

FIG. 2 is a perspective view showing an outline of an abrasive supply device of the present invention.

FIG. 3 is a side sectional view showing an abrasive supply device according to an embodiment of the present invention.

FIG. 4 is a perspective view showing an abrasive supply device according to an embodiment of the present invention.

FIG. 5 is an explanatory view of an abrasive supply portion of a conventional generally used direct pressure blast apparatus.

FIG. 6 is an explanatory cross-sectional view showing an outline of an abrasive supply device using a conventional roller.

FIG. 7 shows the flow of an abrasive in an abrasive feeder of an abrasive supply apparatus using a conventional roller.

FIG. 8 is a side view showing the direct pressure blast device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High-pressure gas 3 Air flow by differential pressure between high-pressure layer and low-pressure layer 4 High-pressure gas supply port 5 Abrasive material 6 Abrasive + high-pressure gas 7 Work substrate 10 Abrasive material supply device 11 Abrasive material supply roller recess 12 Abrasive material layer 14 High pressure Layer 15 Low pressure layer 16 Abrasive supply roller 17 Abrasive collection port 18 Gap adjusting plate 19 Abrasive adjustment air 20 Abrasive spray nozzle 21 Abrasive tank 22 Abrasive pressure tank 23 High pressure gas conduit 24 Abrasive supply valve 28 Abrasive Supply pipe (abrasive supply hose) 30 Processing chamber 31 Blast device main body 32 Classifier (cyclone) 33 Hopper 34 Main body conduit 35 Dust collector 36 Vibrator 37 Spring 38 Rubber pipe 39 Dust collection conduit 40 Glass window 42 Abrasive material adjustment pipe 43 Abrasive material introduction hole 48 Abrasive material layer surface 51 Inlet tube 52 Collection rotating plate 53 Polishing Wear part according to charge adjustment tank 54 abrasive inlet 55 flow stream 59 abrasive abrasive material from the air layer 56 pumping port 57 pumping tube 58 pumping port

Claims (5)

[Claims] In a direct pressure blasting process in which an abrasive in a pressure vessel containing an abrasive is supplied to an abrasive injection nozzle by the pressure of a high-pressure gas and injected from the nozzle, grooves, holes, etc. are formed on the circumference of a roller. By passing through the abrasive layer filled with the abrasive so that the abrasive is supplied from the upper portion of the abrasive supply roller so as to be in contact with a part of the circumference of the abrasive supply roller in which the concave portion is formed. After supplying the abrasive to the concave portion on the circumference of the abrasive supply roller, the high-pressure gas supplied from the high-pressure gas supply section is used to remove the abrasive in the roller concave portion, and then remove the abrasive removed from the roller concave portion. An abrasive supply method, wherein the abrasive is supplied to an abrasive spray nozzle by being collected from an abrasive collection port. 2. A direct pressure blasting process in which an abrasive in a pressure vessel containing an abrasive is supplied to an abrasive spray nozzle by the pressure of a high-pressure gas and sprayed from the nozzle, a rotary roller is provided inside the pressure vessel. An abrasive layer filled with an abrasive and a high-pressure gas layer supplied with a high-pressure gas so as to be in contact with a part of the circumference of the abrasive supply roller in which a recess such as a groove and a hole is formed on the circumference of the rotating roller; and A low-pressure gas layer having a lower pressure than the high-pressure gas layer is provided, and after supplying the abrasive to the grooves of the abrasive supply roller that has passed through the abrasive layer by rotating the abrasive supply roller, the air flowing from the high-pressure layer to the low-pressure layer The abrasive is supplied to the abrasive spray nozzle by removing the abrasive in the concave portion of the abrasive supply roller by blowing off the abrasive, and collecting the removed abrasive in the abrasive collecting port provided in the low-pressure layer. Abrasive supplying apparatus in blasting and supplying. 3. The blasting process according to claim 1, wherein the abrasive supply roller is rotated at a set number of revolutions so that an arbitrary set amount of the abrasive is collected at the abrasive supply collecting port. A method for supplying abrasives in blasting, wherein the method supplies the abrasives to an abrasive injection nozzle. 4. The blasting process according to claim 1, further comprising the step of adjusting the speed of air flowing between the high-pressure layer and the low-pressure layer for removing the abrasive in the recess. A method for supplying abrasives in blasting, characterized by providing a gap adjusting plate in parallel with a roller. 5. The blasting process according to claim 1, wherein vibration is applied to an abrasive pressure tank and / or an abrasive supply device in order to fill the abrasive in the abrasive supply roller recess. Abrasive supply method in processing.