JPH11254328A - Blasting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blasting device by which a high working precision against a large working area can be stably and easily maintained and which is effective to scale reduction of a plant. SOLUTION: A number of blast nozzles 17 arranged in a blast chamber 16 are divided into plural blocks, and control means which control supply of blast material are installed per each block, and then a block where the blast material is supplied through the control means is changed selectively to thereby move the blast nozzles 17 and a work 18 relatively. Hereby, blasting is performed to the whole surface to be worked of the work 18. Respective blast- material separating means 20 are installed corresponding to each block.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blast processing apparatus for processing a surface by spraying a powdery or granular blast material made of alumina or the like on a work by placing the blast material on a high-speed air flow. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blast processing device that can easily maintain high processing accuracy and is effective in reducing equipment.

[0002]

2. Description of the Related Art In a blasting machine of this type, for example, a large amount of low-pressure air is used as blast air to enlarge the cross section of a jet from a blast nozzle to improve workability. It is known that a blower suitable for low pressure and large capacity is adopted in place of a high pressure compressor to reduce the size of the air supply equipment (Japanese Patent Publication No. 1-60392). Nevertheless, work that still requires a particularly large processing area and high processing accuracy, such as a PD that tends to be larger,
In the case of P, that is, in the case of forming a rib of a plasma display panel, not only an increase in installation space and cost due to an increase in equipment due to an increase in size of the work, but also an increase in the processing area thereof. Since technical difficulties arise in the uniform and proper supply of blast material and blast air, there are also difficulties in maintaining the processing accuracy, which has been one of the major obstacles to realizing a large size.

[0003]

SUMMARY OF THE INVENTION The present invention has been developed in view of such conventional circumstances, and can stably and easily maintain high processing accuracy even for a large processing area. It is an object of the present invention to provide a blast processing device that is effective for reducing the size of a blasting machine.

[0004]

In order to solve the above-mentioned problems, the present invention divides a large number of blast nozzles disposed in a blast chamber into a plurality of blocks and supplies blast material for each of the blocks. By installing control means for controlling and selectively switching the block for supplying the blast material through the control means and relatively moving the blast nozzle and the work, the entire work surface of the work is controlled. The technical means of blasting was adopted. As a result, the range of the blast nozzles operating simultaneously is reduced to the blast nozzles belonging to each of the divided blocks, so that the supply of the blast material and the blast air to each nozzle properly and uniformly becomes easier and required. Process accuracy, and
Blast air supply equipment and blast material supply and recovery equipment can be significantly reduced. As a result, blasting can be sufficiently applied to a process of forming a rib of a PDP, which is increasing in size.

Further, if individual blast material separating means is disposed above the blast nozzle corresponding to each block, its own weight can be used for supplying the blast material to the blast nozzle, so that the low-pressure blast air can be used. This is extremely effective when the suction force on the blast material is relatively small, as in the case of using. In particular, if a secondary cyclone separator is employed as the individual blast material separating means, a high-precision separating action can be obtained by the multi-stage separating means, so that good processing with a blast material having a uniform particle size can be obtained.

In addition, the supply of the blast material to all of the blocks is stopped, and only the air is blown out from the blast nozzle, so that the work surface of the workpiece can be air-cleaned. In addition, a suction nozzle for dust collection is provided corresponding to each of the blocks, and the suction nozzles are connected to the inlet side of the blast material separating means via opening / closing valves, respectively. It is possible to suck and remove dust such as used blast material and processing debris that has accumulated on the processing surface through the suction nozzle corresponding to the appropriate block, including those other than and the block that is operating It is. Further, the blast material removed by suction is separated by the separating means and can be reused.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is extremely suitable for a large machining area requiring high machining accuracy as described above, but can be widely applied to other cases. Also,
It is suitable for low pressure blast air, but can be applied to other forms. Various blasting materials such as alumina can be used as the blasting material. The arrangement of each block is generally a linear arrangement, but may be, for example, a stair-like arrangement. If the processing width consisting of the whole block is set to be equal to or greater than the processing width on the work side,
It can be dealt with only by the relative movement between the workpiece and the blast nozzle in the direction orthogonal to the processing width, but if the relative movement in the processing width direction is also added, the processing width is not necessarily adjusted on the workpiece side. There is no need to set it to a value greater than the width.
The relative movement between the work and the blast nozzle is
The form of moving the work side is desirable for maintaining the processing accuracy, but it is also possible to move the blast nozzle side.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system configuration diagram illustrating the entire system configuration of an embodiment of the present invention. In the figure, 1 is a primary cyclone separator, 2 is its primary cyclone separator 1
An appropriate rotary valve 3 disposed at a discharge port of the blast material separated by the above is a blast material supply tank. In the present embodiment, the primary cyclone separation device 1
The blast material supply tank 3 constitutes a blast material supply mechanism. That is, a return pipe 5 in which used blast material and processing waste are mixed is connected to the inlet 4 side of the primary cyclone separation device 1, and the blast material separated in the primary cyclone separation device 1 and the supply tank 3. The required blast material is supplied for processing through the storage unit 6 by the blast material supplied from the storage unit. The outlet 7 of the primary cyclone separator 1 is connected via a suction pipe 8 to a suction chamber 10 set to a negative pressure by a suction fan 9. A filter 11 is provided in the suction chamber 10, and air is exhausted through the filter 11. The solid content separated by the filter 11 is discharged through an opening / closing valve 12 such as a rotary valve.

On the other hand, in this embodiment, a low-pressure air generator 13 composed of a roots blower or the like is installed below the suction chamber 10 so that a large amount of low-pressure air can be supplied by an air supply pipe 15 through a silencer 14. It is composed.

[0010] In the blast chamber 16 for blasting,
In the present embodiment, 60 blast nozzles 17 are arranged in a plurality of rows, for example, in a staggered manner, and the entire processing surface of the workpiece 18 is set by setting the processing regions by the blast nozzles 17 to partially overlap. It is configured to be processed evenly. Further, in the present embodiment, 60 blast nozzles 17 are configured to be divided into four blocks of 15 and operate. That is, above the blast chamber 16, individual blast material separating means 20 composed of four secondary cyclone separating devices connected to the blast material storage section 6 via the supply pipes 19 respectively.
By controlling the respective rotary valves 21, the individual blast material separating means 2 through the blast material supply header 22 and the supply pipe 23 are provided.
It is configured such that the blast material can be supplied to each blast nozzle 17 belonging to the corresponding block every zero. Regarding blast air, four blast air supply headers 25 connected to the air supply pipes 15 via butterfly valves 24 and the like are provided, respectively.
By controlling each butterfly valve 24, low pressure air can be supplied to each blast nozzle 17 belonging to a block corresponding to each supply header 25 via a supply pipe 26.

The outlet side of each of the secondary cyclone separation devices constituting the individual blast material separation means 20 is connected to a suction pipe 28 through an appropriate opening / closing valve 27, and a manual damper means 29 and an auxiliary suction means 30 are connected. Through the suction chamber 10. And the auxiliary suction means 30
Of the ejector effect by high-pressure air at the control valve 3
The suction pressure of the individual blast material separating means 20 can be finely adjusted by adjusting the pressure through the first blast material separating means 20. Further, high pressure air can be supplied to the supply header 22 of each blast material through the supply pipe 32, and the supply of the high pressure air agitates the blast material in the supply header 22 and increases the internal pressure. Thus, the blast material can be easily sent to the blast nozzle 17. Further, a flow control valve 33 and a supply pipe 34 are connected to each supply header 22 so that atmospheric pressure can be used to assist in sending out the blast material. Further, a stacking chamber 35 for used blast material and processing waste is formed below the blast chamber 16, and is connected to the return pipe 5 through the respective stacking sections 36 and the collecting pipe 37, and is connected to the primary cyclone separator 1. It is configured to be sucked. In the figure, reference numeral 38 denotes an opening adjustment valve connected to the air supply pipe 15 for fine adjustment of the pressure of the supply header 25 for blast air or when the supply header 25 is switched or stopped. This is used when the air is released to the atmosphere to protect the generator 13.

In this embodiment, the supply header 22 for the blast material and the supply header 25 for the blast air are divided into four blocks A to D as described above, and the blast nozzle 17 is formed in a form corresponding to each block. Are divided into four blocks of fifteen. At the time of execution of processing, first, any of the blocks is operated to control the work 18 by using the blast nozzle 1 through control means such as the rotary valve 21, the opening / closing valve 27, and the butterfly valve 24.
7 in a direction orthogonal to the arrangement direction. When the movement is completed, the block is switched to another block and the work 18 is moved in the opposite direction. In the case of this embodiment, 4
Since the entire width of the work surface of the work 18 is set to be processed by one block, the entire work surface of the work 18 can be blasted by repeating this operation two times. When the above-mentioned predetermined processing step is completed, the supply of the blast material to all the blocks is stopped once, and only the air is blown from the blast nozzle 17 to clean the processing surface of the work 18 with the air. Can be.

FIG. 2 is a schematic structural view showing another embodiment in which a cleaning mechanism for the work surface of the work 18 is added. As shown in the figure, in the present embodiment, suction nozzles 39 are provided corresponding to the blast nozzles 17, and these suction nozzles 39 are connected to the primary cyclone separation device through appropriate opening / closing valves 40 and suction pipes 41. By connecting to the inlet 4 side of 1, it is configured to be able to suck and remove used blast material and processing waste accumulated on the processing surface of the work 18. The suction operation is performed by using the blast material accumulated on the surface to be processed through the suction nozzle 39 corresponding to an appropriate block, including the block other than the operating block or the operating block. This means that dust such as dust and processing dust is removed by suction and washed. In particular,
For example, in FIG. 1, when the block A at the left end is blasting, the other blocks B, C, and D suck, and when the blasting moves to the B block, the blocks A, C, and D
When the blast processing is finally performed in the block D, control is performed so that the blocks A, B, and C suck. Further, as another control example, first, the block A executes blast processing, and then, when the process moves to the block B, only the block A is sucked. Next, when the blast processing moves to the block C, a form in which only the block B is sucked is also possible. Further, when blasting is performed in the block A, it is also possible to control so that the block A sucks at the same time, and then when the blasting moves to the block B, the block B sucks. In the drawing, reference numeral 42 denotes an auxiliary wall member made of a brush or the like for assisting the suction operation of the suction nozzle 39. Further, if a device 43 for increasing the suction force by blowing high-pressure air to the cyclone side is inserted in the suction pipe 41 connected from the suction nozzle 36 to the inlet side of the primary cyclone separation device 1, the cleaning effect can be obtained. Can be improved.

[0014]

According to the present invention, the following effects can be obtained. (1) The blast nozzle is divided into a plurality of blocks and the range of blast nozzles that operate simultaneously is reduced, so that appropriate and uniform supply of blast material and blast air to each nozzle is facilitated and high processing accuracy is achieved. It can be realized stably. Therefore, the blast processing can be applied even to a case where the processing area is large with a high processing accuracy, such as a rib forming processing of a PDP, which is increasing in size. (2) Since the blast nozzle is made into a block, the air supply equipment for blast air and the supply and recovery equipment for the blast material can be significantly reduced. (3) If individual blast material separating means is disposed above the blast nozzle corresponding to each block, the own weight of the blast material itself can be used for supply to the blast nozzle, so that a smoother supply state can be easily achieved. Is obtained. Especially,
This is extremely effective when the suction force on the blast material is relatively small, such as when using low-pressure blast air. (4) If a secondary cyclone separation device is employed as the individual blast material separation means, a more accurate separation action can be obtained, so that a favorable processing state with a blast material having a uniform particle size can be obtained. (5) By stopping the supply of the blast material to all of the blocks and ejecting only the air from the blast nozzle, the work surface of the workpiece can be easily air-cleaned. (6) Suction nozzles for dust collection are provided corresponding to the respective blocks, and the suction nozzles are connected to the inlet side of the blast material separation means via opening / closing valves, respectively. By using the negative pressure, dust such as used blast material and processing waste accumulated on the processing surface can be easily removed by suction.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing an overall system configuration of an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cyclone separation apparatus, 2 ... rotary valve, 3 ... supply tank, 4 ... inlet, 5 ... return pipe, 6 ... storage part, 7 ... outlet, 8 ... suction pipe, 9 ... suction fan, 10 ... suction chamber, 11
... Filter, 12 ... Open / close valve, 13 ... Low-pressure air generator, 14 ... Silencer, 15 ... Air supply pipe, 16 ... Blast, 17 ... Blast nozzle, 18 ... Work, 19 ... Supply pipe, 20 ... Individual blast material separating means 21 rotary valve, 22 supply header, 23 supply pipe, 24 butterfly valve, 25 supply header, 26 supply pipe, 27
... Opening / closing valve, 28 ... Suction tube, 29 ... Manual damper means,
Reference numeral 30: auxiliary suction means, 31: control valve, 32: supply pipe, 33: flow control valve, 34: supply pipe, 35: accumulation chamber, 36: accumulation section, 37: collecting pipe, 38: open adjustment valve, 39 ... Suction nozzle, 40: open / close valve, 41: suction tube, 42: auxiliary wall member, 43: suction power increasing device

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor, Yukiyuki Yasuyoshi 58, Kozuda Honmachi Kou, Kanazawa-shi, Ishikawa Pref.

Claims (5)

[Claims] 1. A large number of blast nozzles arranged in a blast chamber are divided into a plurality of blocks, and a control means for controlling the supply of the blast material is provided for each of the blocks. By selectively switching the block for supplying the blast material and relatively moving the blast nozzle and the work, blast processing can be performed on the entire work surface of the work. Blasting equipment. 2. The blasting machine according to claim 1, wherein individual blasting material separating means is disposed above the blast nozzle corresponding to each block. 3. The blasting machine according to claim 2, wherein said individual blast material separating means is a secondary cyclone separating device. 4. The processing surface of a workpiece can be air-cleaned by stopping supply of blast material to all of the blocks and jetting only air from the blast nozzle. The blasting device according to any one of claims 1 to 3. 5. A suction nozzle for collecting dust corresponding to each of the blocks, and each of the suction nozzles is connected to an inlet side of the blast material separating means via an opening / closing valve. The blast processing device according to any one of claims 1 to 4.