JP2000000768A - Direct pressure type continuous abrasive feeding and injecting method, and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously feed in a stable state a quantitative amount of abrasives from an abrasive recovery tank to an injection nozzle and to easily and reliably set an injection amount of abrasives to a desired value. SOLUTION: An abrasive 34 in an abrasive recovery tank 26 is charged or collected in an abrasive feed hole 24 in the periphery of a rotating abrasive feed machine 20. The abrasive 34 is spouted through a feed and receiving port 22, fronting on the rotation locus of the abrasive feed hole 24, by injection compression air 31 and carried to an abrasive feed pipe 30 through a feed and receiving pipe 29 and forcibly fed to an injection nozzle 11 by pressure compression air 32 and the abrasives 34 are injected against a work. By regulating the rotation speed of an abrasive feed machine, an abrasive feed amount is easily set to a desired value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION In blasting, it is a good and stable blasting process to inject the abrasive in an abrasive recovery tank quantitatively from a spray nozzle to a workpiece, that is, to maintain a constant injection amount. This is one of the important blasting conditions for performing blasting. In particular, in recent years, blasting has been increasingly used for fine cutting of several μm to several hundred μm in addition to the traditional mere scale removal and deburring. ing. For example, semiconductor, fine ceramic, PDP
(Plasma display) Other small cutting of thin film surface,
Also, as an alternative to machining, laser machining, and ultrasonic machining of metal parts, micro-cutting by blasting has been performed. In particular, when these processes are performed by an automated line, control of the injection amount is an important factor.

The present invention meets the above-mentioned needs by continuously and stably supplying the abrasive in the abrasive tank to the injection nozzle in a quantitative manner, and by directly supplying the abrasive for injection. The present invention relates to a pressure-type continuous supply / injection method and apparatus.

[0003]

2. Description of the Related Art When blasting devices are classified by injection method,
Abrasives are put into an abrasive recovery tank, and the inside of the tank is pressurized with compressed air to feed the abrasives, and the abrasives are ejected from the nozzles. It is divided into the suction type that sucks into the inside of the structure and sprays the abrasive with compressed air from the tip.

FIG. 8 shows a conventional direct pressure blasting apparatus.
In the abrasive recovery tank 40, the abrasive after the injection and the dust are separated, and the dust is collected by a dust collector 53.
And the abrasive drops downward and accumulates in the lower portion of the abrasive recovery tank 40. An abrasive pressurizing tank 42 is provided below the abrasive collecting tank 40, and the abrasive pressurizing tank 4
When the abrasive is no longer present in 2, the dump valve 41 is lowered and the abrasive in the abrasive collection tank 40 is removed from the abrasive pressurizing tank 42.
to go into. When the abrasive enters the abrasive pressurizing tank 42, the abrasive pressurized compressed air 4 is supplied through the abrasive pressurized compressed air supply port 44.
7, the dump valve 41 closes, and the pressure in the abrasive pressurizing tank 42 increases, so that the abrasive is pushed out from the abrasive supply port 43. At this time, the pressure of the abrasive pressurized compressed air 32 is adjusted by the abrasive supply amount adjustment valve 45, and the abrasive at the abrasive supply port 43 is sent to the abrasive hose 12, and the abrasive pressurized compressed air 32 Nozzle body 1
1 and the abrasive is sprayed from the nozzle tip 14.

As a conventional direct pressure type abrasive supply device 70, for example, as shown in FIG. 9, a direct pressure type recovery tank 71 for classifying dust from the abrasive and collecting reusable abrasive is used. In the lower part near the bottom surface, a feed pipe 73 that passes through the inside from the side wall of the collection tank 71 and penetrates a side wall 72 opposite to the side wall is provided, and a small diameter introduction hole 74 is provided in the upper part of the feed pipe 73. ing. The feed pipe 73
8 communicates with the injection nozzle via an abrasive supply pipe (not shown), and the other end of the supply pipe 73 faces outward of the side wall of the collection tank 71 in FIG.

[0006] As the abrasive in the collection tank 71 gradually falls at a substantially constant speed from the introduction hole 74 provided in the feed pipe 73 into the feed pipe 73, the abrasive in the collection tank 71 is added to the abrasive in FIG. 9. A mortar-shaped hole is formed as shown by the dashed line, and the mortar-shaped hole gradually expands. On the other hand, the introduction hole 74
The abrasive dropped from the pipe is piled up into a feeding pipe 73 so as to form a cone, and the abrasive of the cone is sucked toward the injection nozzle by the airflow flowing through the feeding pipe 73.

[0007]

As described above, recent blasting is used for micro-cutting. Therefore, it is required to control the injection amount accurately.
The conventional blast processing apparatus has the following problems.

In the above-described conventional direct pressure blasting apparatus, although energy efficiency is high and intense blasting can be obtained, the abrasive is once pressurized in order to pressurize and discharge the abrasive in a pressure tank. It had to be put in a tank and continuous injection was not possible.

Also, the supply amount of the abrasive, and therefore the injection amount,
Inner diameter of abrasive material supply port 43 and abrasive material supply amount adjusting valve 4
5 in addition to adjusting the amount of the abrasive pressurized compressed air 32, the amount of the abrasive sprayed tends to change depending on the amount of the abrasive in the abrasive pressurized tank 42. The amount of supply could not be precisely controlled.

In the above-described abrasive supply means, the amount of the abrasive supplied from the collection tank 71 and the collection tank including the mere abrasive storage tank for storing the abrasive to the feed pipe 73 is equal to the size of the introduction hole 74. The material of the abrasive, the particle size,
It was greatly affected by differences in specific gravity. Furthermore, when the amount of the abrasive in the collection tank 71 is large and when the amount is small, the amount and speed of the abrasive falling from the collection tank to the feed pipe 73 may be different. When the abrasive is injected from the injection nozzle toward the workpiece, the non-reusable abrasive that has collided with the workpiece and is damaged is classified in the collection tank 71, sent to the dust collector, and discarded. Therefore, as the blasting is performed, the amount of the abrasive in the recovery tank 71 decreases, so that the amount of the abrasive falling into the feeding pipe 73 is not always constant.

Further, some abrasives exhibit fine powder properties and others do not. The fine powder property refers to a property in which the abrasive material accumulated at the bottom of the collection tank exhibits a fine powder state such that the angle of repose θ does not become constant. The factor that the abrasive exhibits the fine powder property depends on the material, specific gravity, particle size, pressure in the collection tank, etc. of the abrasive. When the conventional abrasive supply device 70 is used, the abrasive exhibiting the fine powder property is attracted to each other due to the mutual adhesive force peculiar to the fine powder or adheres to the wall surface of the collection tank 71 so that the angle of repose θ becomes constant. However, as shown in FIG. 10, the abrasive in the collection tank 71 has a hole immediately above the introduction hole 74, or a cavity 75 is formed above the introduction hole 74 as shown in FIG. In some cases, the abrasive did not drop.

In a suction type blasting apparatus, continuous injection can be performed, but the injection performance is inferior to a direct pressure type.

As described above, in the conventional abrasive supply / spray method and apparatus, there is a problem that it is difficult to always supply a fixed amount of abrasive from the recovery tank to the spray nozzle and spray it.

SUMMARY OF THE INVENTION The present invention has been made to solve a problem in the course of polishing, and is intended to supply a constant amount of abrasive from a slurry recovery tank to a spray nozzle in a stable and continuous manner, and to polish the slurry. Provides a material supply / spray method and apparatus, and can easily set the desired amount of abrasive supply / spray according to the type of abrasive, supports fine processing and micro cutting, and enables automation of the processing line It is an object of the present invention to provide a method and apparatus for supplying and spraying an abrasive.

[0015]

SUMMARY OF THE INVENTION In order to achieve the above object, a continuous abrasive supply / spray method in a direct pressure type according to the present invention comprises rotating an abrasive supply board horizontally or vertically to supply the abrasive. The abrasive in the abrasive recovery tank is loaded or collected from the loading port of the abrasive recovery tank into a plurality of abrasive supply holes on the outer periphery or side surface of the board, and the abrasive is moved along the rotation locus of the abrasive supply hole. Injection air is preferably injected from one side of the abrasive material supply hole having a small inner diameter, and preferably supplied to an abrasive supply pipe communicating with an injection nozzle by emitting from the other, preferably having a larger inner diameter than the former. (Chart 1; FIG. 2, Claim 2; FIG. 6).

When the inner diameter of the injection port of the injection nozzle is large and the air consumption is large, the abrasive is supplied to the abrasive supply pipe by injection air, and pressurized air for pressure-feeding the abrasive is supplied to the abrasive supply. It is effective to supply to the pipe. (Claim 3).

The abrasive material supply plate is vertically rotated in the abrasive material collection tank, and the abrasive material is collected by, for example, an abrasive supply hole formed on an outer periphery of the abrasive material supply plate. It can also be supplied to the injection nozzle via a tube (claim 4). The amount of the abrasive sprayed, the abrasive material supply board is rotated at a set rotation speed or speed, or, the number of the abrasive material supply holes, the density, the position or number of the array, the volume,
By changing the capacity or the area of the opening, it can be adjusted to an arbitrary set amount (claim 5).

Further, vibration is applied to the abrasive recovery tank (claim 6), or the abrasive in the abrasive recovery tank is agitated to reduce the set amount of the abrasive falling on the abrasive supply plate. It is also possible to reliably maintain the constant (claim 7).

In the abrasive supply / spray apparatus of the present invention, a loading port 27 is provided below the abrasive recovery tank 26, and a plurality of abrasive supply holes 24 are formed facing the loading port. The plate 20 is provided so as to be horizontally rotatable by the rotation drive means 21, and the abrasive supply pipe 30 communicating with the spray nozzle 11 is arranged on one side of the abrasive supply plate facing the rotation trajectory of the abrasive supply hole 24, On the other side surface, there is provided an injection air conduit 28 for injecting and supplying the abrasive, and the conduit 28 is communicated with an injection air supply source (claim 8; FIG. 2).

A through-hole communicating with each of the abrasive supply holes is opened on the abrasive supply plate, facing a rotational locus of the abrasive supply hole, and communicating with an injection air supply source so as to face the opening. And an abrasive supply pipe facing the abrasive supply hole and communicating with the spray nozzle can be provided (claim 9; FIG. 4). Further, a polishing material supply plate 20 is provided rotatably in a vertical direction by a rotation driving means, and a plurality of polishing material supply holes 24 continuous in a circumferential direction are formed on an outer peripheral surface of the polishing material supply plate. Forming through holes communicating with the material supply holes to the outer periphery of the abrasive material supply board, respectively;
An abrasive supply pipe 30 communicating with a spray nozzle is arranged on the outer peripheral surface of the abrasive supply board facing the rotation trajectory of the abrasive supply hole, and the abrasive is communicated with a supply source of injection air (31) to the opening. And a part of the outer periphery of the abrasive supply board is disposed so as to be buried in the abrasive layer in the abrasive recovery tank 26. (Claim 10; FIG. 6).

Further, a higher injection pressure can be obtained by connecting the abrasive supply pipe 30 to a pressurized air supply source (claim 11; FIGS. 2 to 6).

The inner diameter of the abrasive supply hole is smaller than the inner diameter of the upper supply hole 24 communicating with the abrasive supply pipe 30 than the inner diameter of the lower supply hole 25 communicating with the injection air supply source. If the inner diameter of the lower part of the insertion hole is preferably 1 mm or less, it is possible to surely make the injection air flow from the injection hole to the supply hole constant and stable.
2).

The abrasive supply holes are formed by forming one or more rows of a plurality of abrasive supply holes in an annular shape so as to draw the same rotation trajectory. It can be formed concentrically (claim 13).

A plurality of abrasive supply pipes each communicating with a plurality of spray nozzles are arranged for each of the rows, facing a horizontal or vertical rotation trajectory of the abrasive supply holes formed in a plurality of rows. In addition, the processing efficiency in the automatic line can be improved (claim 14).

[0025]

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

A blasting apparatus 50 for installing the abrasive supply / spraying apparatus of the present invention includes an injection nozzle 11 for injecting an abrasive to the workpiece, a cabinet 51 for charging the workpiece, and a spray nozzle 11. The reusable abrasive is separated by separating the dust from the abrasive injected from the nozzle, and communicates with the abrasive recovery tank 26 for storage via a pipe. An air flow is generated from the cabinet 51 to the abrasive recovery tank 26 by communicating with an air flow generating means such as a machine, and the abrasive or dust is placed on the air flow and transferred. The abrasive recovery tank 26
May be a so-called cyclone itself, or may be a tank that communicates with a lower portion of the cyclone 13 and simply stores the abrasive of the cyclone 13.

In this specification, tanks functioning as tanks for supplying abrasives to the injection nozzles in various abrasive injection systems via an abrasive supply pipe are collectively referred to as "abrasive recovery tanks".

The abrasive recovery tank 26 communicating with the lower part of the cyclone 13 is provided with a loading port 27 communicating with the abrasive supply hole 24 at the lower part, and the abrasive 34 stored in the abrasive recovery tank 26 is used for polishing. It falls into the material supply hole 24, flows in, and is filled or loaded.

Preferably, the abrasive recovery tank 26 is connected to vibration generating means such as a vibrator (not shown) or means for stirring the abrasive in the tank by compressed air or the like,
The flow of the abrasive 34 into the abrasive supply hole 24 is ensured, that is, by preventing the bridging of the abrasive 34 in the abrasive recovery tank 26 by the vibration generating means and the stirring means, the abrasive is supplied to the abrasive supply hole 24. Is constant.

The abrasive supply plate 20 having the abrasive supply hole 24 is preferably a flat plate made of synthetic resin and horizontally rotated at a constant speed by the rotational force of a rotary driving means such as a motor 21. 27 is provided near the lower portion of the loading port 27 so that the polishing material supply hole 24 communicates with the polishing material supply hole 24. The thickness of the abrasive supply plate 20 can be arbitrarily set in accordance with the amount of abrasive supplied / sprayed. If the thickness is large, the volume of the abrasive supply hole 24 can be increased, and many abrasives 34 can be formed. Can be supplied efficiently.

The abrasive material supply hole 24 is formed by drilling in the thickness direction of the abrasive material supply plate 20.
It is necessary that the inflowing abrasive does not fall from the abrasive supply hole 24 and is a through hole. That is, the abrasive supply hole 2
4 flows into and out of the metal port 22 preferably made of metal.
The abrasive is transported to the lower part of the nozzle, and the abrasive may be of any shape as long as it can be injected and blown up by compressed air, which forms the injection air 31, here. If the inner diameter of the injection hole 25 is smaller than the inner diameter of the supply hole 24 at the upper portion of the hole, and more preferably, the inner diameter of the injection hole 25 is 1 mm or less, the abrasive air does not fall from the abrasive supply hole 24 even if the fine abrasive powder is used. At the supply hole 24.

The abrasive material supply hole 24 is formed by forming a plurality of penetrating insertion holes into a plurality of, in the present embodiment, three annular rings each drawing the same rotational locus, and forming one or a plurality of rows. can do. At this time, if the plurality of annular insertion rows are provided at positions that do not overlap with each other in the diametric direction of the abrasive supply board 20 in each of the inner and outer rows, each of the insertion holes is used to supply the abrasive material. During the rotation of the board 20, a plurality of positions are always located in the transmission / reception port 22, and the transmission / reception port 22
There is no interruption in the supply of the abrasive material 34 to the metal.

Abrasive supply pipe 3 communicating with injection nozzle 11
0 branches this into a transmission / reception pipe 29, and the transmission / reception pipe 29
The transmission / reception port 22 formed at the end of the hole is formed so as to face the rotation trajectory of the plurality of rows of abrasive supply holes 24, in this embodiment, all the rotation trajectories of the plurality of abrasive supply holes 24. .

The abrasive supply hole 24 (injection hole 25)
Communicates with an injection air supply source (not shown) via an abrasive supply hole 24, a holding port 23, and a conduit 28. That is, a metal holding port 23 formed at the end of a conduit 28 communicating with the injection air supply source is provided on the other side surface of the sending / receiving port 22 in the opposite direction of the abrasive material supply plate 20 with the abrasive material supply plate 2.
0 is rotatably provided as close as possible.

The abrasive which has flowed into the abrasive supply hole 24 is transferred to a lower portion of the sending / receiving port 22 by the rotation of the abrasive supply board 20, and is ejected and blown up by the ejection air 31 from the conduit 28 to send and receive the abrasive. It is sent to tube 29. At this time, in order to prevent the abrasive from leaking to the outside, it is desirable to provide the low friction material sending / receiving port 22 and the turntable holder 23 as close as possible to the abrasive supply board 20. .

The abrasive sent to the sending / receiving pipe 29 is injected from the injection nozzle 11 through the abrasive supply pipe 30 by the injection air 31. For the fine powder abrasive, the abrasive is supplied and processed by the injection air alone. Is possible, but the abrasive material,
Depending on the specific gravity or the particle size, the abrasive supply hole 24 for the abrasive may be used.
Although the injection from the nozzle is sufficient, a pressurized air supply source (not shown) is connected to the abrasive supply pipe 30 separately from the injection air 31, and the abrasive is processed by the compressed air 32, here, compressed air. By injecting at an object, it becomes possible to inject at a higher pressure.

The flow rate of the injection air 31 is smaller than the flow rate of the pressurized air 32 because the inner diameter of the lower portion of the abrasive supply hole 24 is small. Therefore, since the abrasive is sprayed with a constant amount of compressed air, stable blast processing is possible.

When the abrasive supply holes 24 are formed in a plurality of rows, a plurality of transmission / reception ports 22 are provided so as to face the rotation trajectories of the respective abrasive supply holes 24, and the plurality of transmission / reception ports 2 are provided.
By providing the injection nozzles 11 communicating with each other, the abrasive can be stably injected from the plurality of injection nozzles 11 to the workpiece, and at the same time, the processing efficiency in the automatic line can be increased.

Hereinafter, more specific embodiments will be described with reference to the drawings.

In FIGS. 1 and 2, a reusable abrasive 34 after the dust is separated is stored at the bottom of the abrasive recovery tank 26 provided with a mechanism for separating the so-called cyclone dust from the abrasive. A loading port 27 communicating with the abrasive supply hole 24 is provided at the bottom of the abrasive recovery tank 26, and the abrasive 34 stored in the abrasive recovery tank 26 is provided.
Flows into the abrasive supply hole 24.

Reference numeral 20 denotes an abrasive supply plate, which in this embodiment is shown in FIG.
As shown in FIG. 3, in the thickness direction of the abrasive supply board 20,
Three rows of abrasive supply holes 24, which are circular through holes continuous in the rotation direction, are formed concentrically with respect to the rotation center of the abrasive supply board.

In the insertion hole, the inner diameter of the upper supply hole 24 was 3 mm, the depth was 30 mm, and the inner diameter of the lower injection hole 25 was 0.5 mm.

The abrasive supply plate 20 is supported by a rotating shaft so that the abrasive supply hole 24 communicates with the abrasive recovery tank 26 through the loading port 27 and is horizontally rotatable. The rotation shaft is connected to the rotation driving means of the rotation motor 21. The rotation speed of the rotation driving means is configured to be adjustable by a known means.

In FIGS. 1, 2 and 3, reference numeral 22 denotes a sending / receiving tube, which is connected to an abrasive supply tube 30 communicating with the injection nozzle 11, and a rear end face of the sending / receiving tube 29 is connected to the abrasive supply plate 2;
A transmission / reception port 22 having a circular opening slightly larger than the opening of the abrasive material supply hole 24 is formed. In addition, a holding port 23 is formed at the front end of the conduit 28 communicating with an ejection air supply source (not shown) at the front end in the ejection air supply direction and coaxially with the transmission / reception port 22 so as to be coaxial with the transmission / reception port 22. Hole 2
4.

When the abrasive supply plate 20 is rotated at a constant speed by the rotary drive means, the abrasive falls from the loading port 27 into the abrasive supply hole 24 and the loaded abrasive in the abrasive recovery tank 26 is moved to the lower portion of the sending / receiving port 22. Be transported. When the electromagnetic valve (not shown) is opened by the operation of the foot switch or the micro switch and the injection air 31 is sent from the injection air supply source through the conduit 28, the abrasive in the abrasive supply hole 24 is supplied to the sending / receiving port 2.
It is injected into the abrasive supply pipe 30 through the pipe 2 and the transfer pipe 29 and is blown up. At the same time, the abrasive supply pipe 30 communicates with a pressurized air supply source (not shown), and the abrasive sent through the sending / receiving pipe 29 and the pressurized air 32 are injected from the injection nozzle 11 at high pressure. You.

Further, a vibrator or a stirring means is connected to the abrasive recovery tank 26, and the abrasive recovery tank 2
By vibrating the abrasive 6 or stirring the abrasive 34 in the abrasive recovery tank 26, the abrasive 34 is loaded into the loading port 27.
The amount of the abrasive that sufficiently flows into the abrasive supply hole 24 and flows into the abrasive supply hole 24 is always constant, and a constant amount of the abrasive is supplied in a more stable state.

By adjusting the rotational speed of the abrasive supply board 20, the number of rotations can be increased or decreased, and the amount of abrasive supplied to the injection nozzle 11 can be adjusted. For example, by increasing the rotation speed of the abrasive supply plate 20, a large amount of the abrasive is supplied, and by reducing the rotation speed of the abrasive supply plate 20, a small amount of the abrasive is supplied. By maintaining the rotation speed of the abrasive supply board 20 constant, a constant amount of abrasive is supplied to the injection nozzle 11 in a constantly stable state, and a fixed amount of abrasive is continuously and stably supplied from the injection nozzle 11. Is injected into the workpiece. Accordingly, when the volume of the other abrasive supply holes 24 or the opening area of the sending / receiving port 22 is constant, the rotational speed of the abrasive supply board 20 and the amount of abrasive supply are correlated. By obtaining the relational expression and digitizing the supply amount of the abrasive by the rotation speed of the abrasive supply plate 20, the desired supply amount of the abrasive can be easily adjusted.

When the abrasive is sprayed from the spray nozzle 11 to the workpiece in the cabinet 51 and the workpiece is blasted, the abrasive becomes a reusable abrasive or a damaged non-reusable abrasive. The dust and the like generated by the separation of the abrasive and the workpiece are both supplied to the cyclone 13 via the conduit 52 in the airflow. In the cyclone 13, non-reusable abrasives and dust are separated from reusable abrasives, and the non-reusable abrasives and dust are fed to the dust collector 53 and collected in the lower part of the dust collector 53. Then, clean air is discharged from the exhaust fan 54 of the dust collector 53 to the outside air. On the other hand, after the reusable abrasive is stored at the bottom of the abrasive recovery tank 26, the above-described operation is repeated.

Blasting was performed under the following processing conditions using the above-described abrasive supply and injection method and apparatus.

[0050]

[Table 1]

When the supply flow rates of the injection compressed air and the pressurized compressed air were measured by the blasting, the ratio was 1:17, and a small amount of the injection compressed air was sufficient. Therefore,
Abrasive material is always injected by a fixed amount of compressed air,
The difference between the strong and weak parts was 3% or less per 30 cm ² , and uniform processing was obtained.

FIG. 4 and FIG. 5 show that a plurality of circumferentially continuous abrasive supply holes 24 are formed in the side surface of the abrasive supply plate 20 in two rows in a concentric manner in this embodiment. A single U-shaped bent through hole 25 ′ communicating with the lower end of the abrasive injection holes 25, 25 below each of the two rows of abrasive supply holes 24 is formed. A through hole 25 ′ is formed on the abrasive supply board 20 near the periphery to open. By opening the through-hole 25 ′ on the abrasive supply board 20, it is possible to completely prevent the abrasive from dropping from the abrasive supply hole.

A transmission / reception port 22 is provided near the transmission / reception pipe 29 so that the conduit 28 faces the opening, and the transmission / reception port 22 is slightly larger than the openings of the abrasive supply holes 24, 24. The holes 22 ', 22' are formed.

The injection process is almost the same as the embodiment shown in FIGS.

The abrasive in the abrasive recovery tank 26 that has dropped from the loading port 27 into the abrasive supply hole 24 and is transferred to the lower portion of the sending / receiving port 22, and is sent from the injection air supply source to the conduit 2.
When the injection air 31 is sent through the through hole 8, the abrasive in the abrasive supply holes 24, 24 is sent from the abrasive injection holes 25, 25 through the through holes 25 ′, and the abrasive in the abrasive supply holes 24, 24 is inserted into the insertion hole 22 ′ of the sending / receiving port 22.
22 ′ is injected into the abrasive supply pipe 30 through the transfer pipe 29 and blown up. Here, if necessary, the abrasive sent through the sending / receiving pipe 29 is ejected from the ejection nozzle 11 at high pressure by the pressurized air 32.

FIGS. 6 and 7 show a configuration in which the abrasive supply plate 20 shown in FIGS. 3 to 5 is rotated at a vertical position. Reference numeral 26 denotes an abrasive recovery tank, which is preferably a closed box which has a substantially rectangular parallelepiped shape. In the tank, an abrasive layer 17 made of the abrasive flowing into the lower portion of the abrasive recovery tank 26 is formed below, and an air layer 18 is formed above the abrasive layer 17.

In this embodiment, a plurality of abrasive supply holes 24 which are continuous in the circumferential direction are formed in the outer peripheral surface of the abrasive supply board 20 in two rows concentrically, and are the same as in the embodiments of FIGS. 4 and 5 described above. A through hole 25 ′ formed by bending the abrasive injection hole 25 below the two rows of abrasive supply holes 24 into a U-shape is formed so as to open on the outer side of the outer peripheral surface width direction of the abrasive supply board 20. ing.

Then, the abrasive supply plate 2 of the through hole 25 '
The transmission / reception port 22 is provided so that the conduit 28 faces an opening formed on one outer side in the outer circumferential surface width direction of the conduit 0.

The abrasive supply board 20 is provided with an abrasive recovery tank 26.
The rotating shaft 60 is rotatable vertically in the abrasive layer 17 in the inside.
Since the upper portion or a part of the upper portion of the abrasive supply plate 20 is provided at a position exposed to the air layer 18, the abrasive supply hole 2 containing the abrasive collected in the abrasive layer 17 is provided.
When the nozzle 4 reaches below the sending / receiving port 22, the injection air supplied from the conduit 28 is sent from the abrasive injection hole 25 to the abrasive supply hole 24 through the through hole 25 ', and the abrasive supply hole 24
The abrasive in the inside is pressed and ejected and sent out to the sending / receiving tube 29.

[0060]

The present invention is as follows. With the configuration described above, the following effects can be obtained.

According to the present invention, a certain amount of abrasive can be stably and continuously supplied and injected to the injection nozzle even if the abrasive has a fine powder property.

According to the present invention, it is possible to increase or decrease the supply amount of the abrasive by changing the rotation speed of the abrasive supply plate to increase or decrease the number of rotations. Can be continuously supplied to a fixed amount in a stable state. Therefore, by freely adjusting the rotation speed of the abrasive supply plate, it is possible to reliably and easily adjust a desired amount of abrasive supply according to the type of abrasive. Moreover,
By digitizing the rotation speed of the abrasive supply plate corresponding to the abrasive supply amount, it is possible to easily adjust the desired abrasive supply amount, and thus the injection amount.

Alternatively, the number, density,
By changing the volume, the capacity, the area of the opening or the opening area of the sending / receiving port, it is possible to supply and spray an arbitrarily set amount of abrasive.

In the present invention, the abrasive loaded or collected in the abrasive supply hole of the abrasive supply board is injected into the abrasive supply pipe by injection air, blown up, and further pressurized by the pressurized air. Is supplied to the injection nozzle and injected, the supply amount of the injection air is smaller than the supply amount of the pressurized air, and therefore, it can be injected with a certain amount of air, enabling uniform blasting of the workpiece Was.

[Brief description of the drawings]

FIG. 1 is a front view of a blast processing device provided with an abrasive supply / spray device of the present invention.

FIG. 2 is a sectional view of a main part of the abrasive supply / spray device of FIG. 1;

FIG. 3 is a perspective view of a main part of the abrasive supply / spray device of FIG. 2;

FIG. 4 is a cross-sectional view of a main part of another embodiment of the abrasive supply / spray device of the present invention.

FIG. 5 is a perspective view of the abrasive supply / spray device of FIG. 4;

FIG. 6 is a main part perspective view showing a main part cross section of still another embodiment of the abrasive supply / spraying device of the present invention.

FIG. 7 is a perspective view of a main part of the abrasive supply / spray device of FIG. 6;

FIG. 8 is a front view showing a conventional direct-pressure blasting device.

FIG. 9 is a cross-sectional view of a main part of a conventional abrasive supply device, particularly showing a state of the abrasive when an abrasive not exhibiting fine powder properties falls into a feeding pipe.

FIG. 10 is a cross-sectional view of a main part of a conventional abrasive supply device, particularly showing a state of the abrasive when an abrasive exhibiting a fine powder property falls into a feeding pipe.

FIG. 11 is a cross-sectional view of a main part of a conventional abrasive supply apparatus, particularly showing a state of the abrasive when an abrasive exhibiting fine powder properties falls into the inside.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Injection nozzle (nozzle main body) 12 Abrasive material hose 13 Cyclone 14 Nozzle tip 20 Abrasive material supply board 21 Rotary motor 22 Sending / receiving port 22 'Insertion hole 23 Holding port 24 Abrasive material supply hole 25 Abrasive material injection hole 25' Through hole 26 Polishing Material recovery tank 27 Loading port 28 Conduit 29 Transfer pipe 30 Abrasive supply pipe 31 Injection (compressed) air 32 Pressurized (compressed) air 34 Abrasive 40 Abrasive recovery tank 41 Dump valve 42 Abrasive pressurized tank 43 Abrasive supply Port 44 Compressed air supply port for abrasive pressurization 45 Abrasive supply pressure adjusting valve 47 Compressed air for abrasive pressurization 50 Blasting device 51 Cabinet 52 Conduit 53 Dust collector 54 Exhaust fan 60 Rotary shaft 61 Collection hole 62 Collection rotary plate 63 Sending / receiving port 64 Sending / receiving tube 65 Air layer 70 Abrasive supply device 71 Recovery tank 7 Feed tube 74 the introduction hole 75 cavity 76 abrasive

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[Procedure amendment]

[Submission date] July 8, 1998 (1998.7.8)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 8

[Correction method] Change

[Correction contents]

FIG. 8

Claims (14)

[Claims] An abrasive material supply plate is horizontally rotated, and an abrasive material in an abrasive material collecting tank is loaded into a continuous abrasive material supply hole on a side surface of the abrasive material material supplying plate from a loading port of the abrasive material collecting tank.
In the rotation trajectory of the abrasive supply hole, the abrasive is injected from one of the abrasive supply holes with injection air, injected from the other, and supplied to an abrasive supply pipe communicating with an injection nozzle. Direct pressure type continuous abrasive supply and injection method. 2. An abrasive supply disk is vertically rotated, and the abrasive in the abrasive recovery tank is collected in a plurality of continuous abrasive supply holes on the outer periphery of the abrasive supply disk. A direct pressure type continuous abrasive supply, characterized in that the abrasive is injected from one of the abrasive supply holes in the rotation path, and is injected from the other and supplied to the abrasive supply pipe communicating with the injection nozzle.・ Injection method. 3. The abrasive material is supplied to the abrasive material supply pipe by injection air, and pressurized air for pressure-feeding the abrasive material is supplied to the abrasive material supply pipe. Direct pressure type continuous abrasive supply and injection method. 4. The abrasive material supply board is vertically rotated in the abrasive material recovery tank to collect the abrasive material, and supplies the abrasive material to an injection nozzle through the abrasive material supply pipe. Item 4. A direct pressure type continuous abrasive supply / injection method according to Item 2. 5. The polishing material supply plate is rotated at a set number of revolutions or speed, or the number, density, arrangement position or number, volume, capacity, or opening area of the polishing material supply holes is changed. 5. A direct pressure type continuous abrasive supply / injection method according to claim 1, wherein an arbitrary set amount of abrasive is supplied and injected. 6. The direct pressure type continuous abrasive supply / spray method according to claim 1, wherein vibration is applied to the abrasive recovery tank. 7. The direct pressure type continuous abrasive supply / spray method according to claim 1, wherein the abrasive in the abrasive recovery tank is stirred. 8. An abrasive supply plate provided with a loading port at a lower portion of the abrasive recovery tank and having a continuous abrasive supply hole facing the loading port is provided so as to be horizontally rotatable by a rotary driving means, and the abrasive supply is provided. An abrasive supply pipe communicating with an injection nozzle is provided on one side of the abrasive supply plate facing the rotation trajectory of the hole, and further, on the other side of the abrasive supply plate facing the rotation trajectory of the abrasive supply hole. A direct pressure type continuous abrasive supply / injection apparatus, characterized in that an injection air conduit for injecting and supplying an abrasive is provided, and the conduit is connected to an injection air supply source. 9. A loading port is provided at a lower portion of the abrasive recovery tank, and an abrasive supply plate having a continuous abrasive supply hole facing the loading port is provided so as to be horizontally rotatable by a rotary driving means. Opening the through holes communicating with the supply holes respectively on the abrasive supply board, facing the rotation trajectory of the abrasive supply holes, providing a conduit communicating with the injection air supply so as to face the opening, and A direct pressure type continuous abrasive supply / injection device, characterized in that an abrasive supply pipe facing the abrasive supply hole and communicating with the injection nozzle is provided. 10. A polishing material supply board is provided rotatably in a vertical direction by a rotation drive means, and a plurality of circumferentially continuous abrasive supply holes are formed in an outer peripheral surface of the polishing material supply board. A through-hole communicating with the abrasive supply hole is formed so as to open to an outer periphery of the abrasive supply plate, and an abrasive is communicated with a spray nozzle on an outer peripheral surface of the abrasive supply plate facing a rotation locus of the abrasive supply hole. A supply pipe is arranged, and a conduit of injection air for injecting and supplying an abrasive communicating with an injection air supply source to the opening is provided so as to be opposed to the opening. Direct pressure type continuous abrasive supply, characterized by being buried in the abrasive layer in the recovery tank
Injection device. 11. A direct pressure type continuous abrasive supply / spraying apparatus according to claim 8, wherein said abrasive supply pipe communicates with a pressurized air supply source. 12. The abrasive material supply hole, wherein the inner diameter of the lower injection hole communicating with the injection air supply source is smaller than the inner diameter of the upper supply hole communicating with the abrasive material supply pipe, preferably. The direct pressure type continuous abrasive supply / spraying device according to any one of claims 8 to 11, wherein an inner diameter of a lower portion of the insertion hole is 1 mm or less. 13. The abrasive supply hole is formed by forming one or more rows of a plurality of abrasive supply holes in an annular shape each having the same rotational locus, preferably each row is concentric with the rotation center of the abrasive supply plate. 9. The method according to claim 8, wherein the second member is formed in a shape.
13. The direct pressure type continuous abrasive supply / spray apparatus according to 1 or 12. 14. A plurality of abrasive supply holes, each of which is provided so as to face a rotational trajectory of an abrasive supply hole formed in a plurality of rows, and which is connected to a plurality of spray nozzles via the abrasive supply tube. The direct pressure type continuous abrasive supply / spraying device according to claim 8, 9, 10, 11 or 12.