JPH05104442A - Blasting device - Google Patents

Abstract

PURPOSE:To prevent the blinding of a sieve plate even in the case of continuous blasting for automatizing the separation of a burr included in a polish-cleaning material by arranging a sieve container provided with the sieve plate for sieving action on the lower part of a blast chamber, and severally providing an outside air introducing hole below the sieve plate, a burr discharging port on the upper part of the sieve plate, and a polish-cleaning material collecting pipe on the lower part of the container. CONSTITUTION:A blast chamber 5 is provided with an oscillating sieving device 9 to sieve a burr from a polish-cleaning material. The device 9 has a cylindrical sieve container 20 connected to the lower part of a main body container 3 through a polish-cleaning material scatter preventing member 21. A sieve plate 22 for sieving the burr is horizontally spreaded in the container 20, and a burr discharging port 24 is opened above the sieve plate 22 for discharging the sieved burr. An outside air introducing port 26 is provided below the sieve plate 22, and the lower part of the container 20 is provided with a polish-cleaning material collecting pipe 10 communicating with a polish-cleaning material storing chamber 4, and the sieved polish-cleaning material is collected in the chamber 4 by the air introduced through the port 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blasting machine, and while continuously operating the blasting machine with unnecessary dust such as burrs scraped from a work by blasting and mixed into the blasting machine. It is configured to be effectively removed from.

[0002]

2. Description of the Related Art Blasting, which is carried out by placing a granular cleaning agent on a high-speed air stream and jetting it from a blast nozzle, is used to form a base material for metallic materials, satin finish, or
It is widely used for deburring resin molded products and metal molded products. As the abrasive material, those having various hardness and various particle diameters are appropriately selected depending on the kind of the work, the purpose of the blast treatment and the like.

This type of blasting device has a blasting chamber,
It is equipped with a blast nozzle etc. arranged in this blast chamber, and this blast nozzle has an air supply hose introduced from an external air supply source and a polishing and cleaning material storage chamber provided in the upper part of the blast chamber. It is connected to the abrasive cleaning agent supply hose for supplying the abrasive cleaning agent from the above, and when a high-speed air flow is introduced from the above air supply hose, the abrasive cleaning agent supplied from the abrasive cleaning agent supply hose inside the blast nozzle is connected. Is mixed with the air flow and is ejected from the tip of the nozzle.

For example, in a blasting device for deburring a molded product, when the deburring process of the molded product is continuously performed, a work conveyor is arranged in a penetrating manner in the blast chamber. The blast nozzle is configured to inject a high-speed air flow mixed with a polishing agent toward a work that is continuously carried into the blast chamber by riding on the work conveyor. The abrasive cleaning material sprayed from the blast nozzle and working on the workpiece and then falling to the lower part of the blast chamber is usually collected in the abrasive cleaning material storage chamber and used for circulation. In order to recover the polishing / cleaning material dropped to the lower part of the blast chamber in the above-mentioned polishing / cleaning material storage chamber, usually, suction negative pressure is utilized through the polishing / cleaning material recovery pipe.

By the way, in the case where the deburring process of the above-mentioned molded product is performed by blast, the burrs scraped from the work by the abrasive cleaning material sprayed from the blast nozzle are mixed with the abrasive cleaning material and are formed in the lower part of the blast chamber. To fall. When such a polishing / cleaning material with burr mixed therein is circulated and used, such a burr causes a clogging in the nozzle, or a problem of causing clogging in the middle of the polishing / cleaning material conveyance path occurs. Alternatively, since hard burr is sprayed onto the work together with the polishing / cleaning material, the work is damaged. Therefore, the burr mixed in the polishing / cleaning material as described above must be removed.

[0006]

Conventionally, the simplest structure attached to remove unnecessary matters such as burrs mixed in the polishing / cleaning material in the blasting machine is to provide only the polishing / cleaning material in the lower part of the blast chamber. A mesh plate having a mesh of a size capable of penetrating
Alternatively, the punching metal is provided with a large number of through holes that allow only the polishing material to pass therethrough. In the case of a configuration in which such a mesh plate or a sieving plate such as punching metal is provided, the sieving plate is attached to the lower part of the blast chamber so as to be slidable in a pull-out manner. By providing the sieving plate in this way, burrs mixed in the polishing material are sieved by the sieving plate, and only the blasting material permeates the sieving plate and is circulated for use.

However, during continuous operation of the blasting device, the amount of burrs accumulated on the sieving plate gradually increases, and eventually even the polishing and cleaning material becomes difficult to permeate. Therefore, it is necessary to stop the operation of the blast device itself at regular intervals, pull out the above-mentioned pulling-out type sieving plate to the outside, and clean the burrs accumulated on it. For this reason, the continuity as a continuous deburring device is diminished, the efficiency of deburring treatment is reduced, and the workability that the manual cleaning of the sieve plate as described above is required at regular intervals is required. The problem of occurs.

The present invention was devised under the circumstances described above, and automatically secures the blasting device without causing clogging of the sieving plate while ensuring the continuity of the operation of the blasting device. It is an object of the present invention to provide a new blasting device configured to effectively remove burrs mixed in the cleaning material.

[0009]

In order to solve the above problems, the present invention takes the following technical means. That is, in the invention described in claim 1 of the present application, the blast chamber, the polishing cleaning material storage chamber provided in the upper portion of the blast chamber, and the air sent from the air supply means disposed inside the blast chamber are used for the above polishing. It is equipped with a blast nozzle that mixes and injects the abrasive cleaning agent sent from the cleaning agent storage chamber. In a blast device configured to collect in the material storage chamber, a vibration type sieving device is provided in the lower portion of the blast chamber, the vibration type sieving device is given a predetermined vibration by a vibrating means, and the upper part is The sieving container connected to the lower part of the blast chamber so as to be capable of relative vibration, and a sieving plate which is horizontally adjusted in the sieving container and sifts burrs mixed in the polishing and cleaning material are provided. Said sieve on the side wall of the container While providing an external air introduction hole below the plate, while connecting the abrasive cleaning material recovery pipe to the lower part of the sieving container, just above the periphery of the sieving plate on the side wall of the sieving container, is screened by the sieving plate. It is characterized by the provision of a burr discharge port for discharging the burr.

The invention according to claim 2 of the present application is the blasting device according to claim 1, wherein in the vibrating type sieving device, the burrs screened on the sieving plate are spirally directed toward the peripheral portion. It is characterized in that it employs a vibrator to which three-dimensional vibration is applied by the vibrating body.

[0011]

The operation and effect of the invention The burr scraped off from the work during operation of the apparatus is mixed with the abrasive cleaning agent sprayed from the blast nozzle and drops onto the sieve plate in the sieve container. Since the sieving plate is in a vibrating state, the cleaning material quickly permeates the sieving plate and falls, so that the burr is effectively sieved on the sieving plate.

By the way, the three-dimensional vibration applied to the sieve plate by the above-described vibrating screen device causes the behavior of the granular material on the sieve plate, which is similar to a so-called circular part feeder. That is, usually, the granular material sieved on the sieving plate is spirally moved to the peripheral portion by the three-dimensional vibration of the sieving plate as described above, and the granular material thus moved to the peripheral portion is sieved. It is moved along the inner peripheral surface of the container. In this way, the burr that moves while vibrating along the periphery of the sieve plate is automatically and continuously discharged to the outside from the burr discharge port provided on the side wall of the sieve container by the movement caused by the vibration. ..

The polishing / cleaning material that has passed through the above-mentioned sieving plate falls to the lower part of the sieving container, and this polishing / cleaning material is blasted by negative suction pressure through the polishing / cleaning material recovery pipe connected to the lower part of the sieving container. It is collected in the polishing agent storage chamber located in the upper part of the chamber.
In this case, suction negative pressure due to the abrasive cleaning material recovery pipe being connected to the lower part of the sieve container causes a relatively large air flow from the upper part to the lower part inside the sieve container. However, if no measures are taken, even if the sieving plate is vibrating, the burrs screened by this sieving plate are pressed against the sieving plate by the air flow from above to below. In some cases, the expected spiral motion described above does not occur by vibrating the sieve plate.

However, in the above-mentioned sieving container of the present invention, since the air introduction port is opened in the side wall portion thereof, the air flow generated by connecting the polishing / cleaning material recovery pipe to the lower part of the sieving container is as described above. This is achieved by the air flow introduced into the sieving container from the external air inlet. Therefore, since the air flow that passes through the sieve plate from above to below is not so large, the problem that the sieved burs stick to the sieve plate and cause clogging of the sieve plate is avoided. Will be done.

As described above, according to the blasting apparatus of the present invention, it is possible to efficiently remove unnecessary substances such as burrs mixed in the polishing and cleaning material while continuing the continuous operation of the apparatus. As a result, the blasting efficiency such as deburring processing efficiency can be dramatically improved compared to the conventional one, and the trouble of cleaning the burrs accumulated on the sieve plate at regular intervals is completely unnecessary. Therefore, the work cost is reduced, which greatly contributes to the reduction of the product cost.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 shows the overall configuration of a blasting device 1 of this embodiment. The inside of the main body container 3 supported and installed by the plurality of legs 2 is divided into an upper abrasive cleaning material storage chamber 4 and a lower blast chamber 5. The bottom of the abrasive cleaning material storage chamber 4 and the bottom of the blast chamber 5 both have a hopper shape, and the abrasive cleaning material existing in both chambers 4 and 5 is centered at the bottom of each chamber 4 and 5 due to gravity. It can be collected at.

A blast nozzle 6 is arranged inside the blast chamber 5, and a blast nozzle 6 is provided with a blast nozzle 6 at the base end thereof. 7 and an air supply hose 8 connected to an external air supply source (not shown) are connected. As the external air supply source, a compressor that generates compressed air or a low-pressure blower such as a roots blower that generates a low-pressure large-volume air flow is used.

The inside of the blast nozzle 6 is constructed so that the polishing / cleaning material supplied via the polishing / cleaning material supply hose 7 is mixed with the high-speed air stream flowing from the air supply hose 8 to the nozzle hole. Therefore, in the operating state in which the air flow is supplied from the air supply hose to the blast nozzle 6, the high-speed air flow mixed with the polishing and cleaning material is jetted from the tip of the blast nozzle 6.

The work to be blasted may be subjected to the blast treatment by the blast nozzle while being held in the blast chamber by the hand of the operator inserted through the work hole formed in the blast chamber 5. In the case where a conveyor mechanism (not shown) arranged so as to penetrate the blast chamber in the lateral direction is provided, and the blast processing by the blast nozzle 6 is performed on the work continuously carried into the blast chamber by such a conveyor mechanism. Therefore, there are various modes of performing the blast process by the blast nozzle 6 on the work.

A vibrating sieving device 9 is connected to the hopper-shaped lower end of the blast chamber 5, and unnecessary burrs are continuously removed from the polishing material mixed with burrs scraped from the work by the blasting process. It is like this. Since the vibrating type sieving device 9 and its peripheral structure are essential parts of the present invention, they will be described in detail later.

The abrasive cleaning material from which unnecessary burrs are removed by the vibrating sieving apparatus 9 is transferred to the abrasive cleaning material storage chamber 4 through the abrasive cleaning material recovery pipe 10 connected to the lower portion of the vibrating sieving apparatus 9. Be recovered. The recovery of such a cleaning material is carried out by air conveyance using the negative pressure generated by the dust collector 11 arranged on the side of the main body container 3. That is, the dust collecting pipe 12 connected to the dust collecting device 11 is connected to the upper end of the polishing / cleaning material storage chamber 4 while the side wall of the polishing / cleaning material storage chamber 4 and the vibrating screen device 9 are connected. The spaces are connected by the above-mentioned abrasive cleaning material recovery pipe 10. Therefore, the negative pressure generated by the dust collector 11 is
It acts on the lower end connection portion of the vibrating sieving apparatus 9 via the abrasive cleaning material storage chamber 4 and the abrasive cleaning material recovery pipe 10, whereby the abrasive cleaning material dropped below the vibration sieving apparatus 9 is It is conveyed to the above-mentioned polishing / cleaning material storage chamber 4 via the polishing / cleaning material recovery pipe 10 with a suction force by negative pressure.

By the way, the polishing / cleaning material storage chamber 4 in this embodiment is constructed so as to efficiently separate the dust from the polishing / cleaning material containing the dust and send it to the dust collector 11. There is. That is, the baffle 13 hanging from the ceiling
Is provided in the vicinity of the connection portion of the abrasive cleaning material recovery pipe 10,
Thereby, when the air flow introduced from the polishing / cleaning material recovery pipe 10 into the polishing / cleaning material storage chamber 4 passes below the baffle plate 13, the flow cross section is greatly expanded. There is. The abrupt expansion of the flow cross section of the air flow passing below the baffle plate 13 means that the velocity of the air flow is greatly reduced when passing below the baffle plate 13. Even if the flow rate of the air sent to the dust collector 11 through the cleaning material recovery pipe 10 is relatively large, the polishing material is sent to the dust collector 11 via the dust collecting tube 12 while floating in the air flow. Rather, the abrasive cleaning material surely falls due to gravity and falls to the bottom of the hopper-shaped abrasive cleaning material storage chamber, while only fine dust mixed with the burr by the blast treatment into the abrasive cleaning material storage chamber is stored. Room 4
That is, it is sent to the dust collecting device 11 by being carried by the air flow that passes through.

The dust collecting device 11 has a dust collecting element 15 supported by a partition which divides the upper part and the lower part inside the container 14, and has a construction in which a suction blower 16 is arranged on the upper part of the container 14. Dust is removed when air containing dust introduced from the dust tube 12 into the lower chamber of the container is passed through the dust collecting element 15 by the suction force of the suction blower 16.

In addition, what is denoted by reference numeral 17 in FIG. 1 is not removed by the dust collecting element 15 and the container 1
In order to discharge relatively heavy dust or the like accumulated in the lower part of 4 to the outside while maintaining the negative pressure inside the container of the dust collector 11,
A so-called rotary valve is shown.

Now, the vibrating sieving apparatus 9 is based on the base 1
8 is supported by a plurality of elastic springs 19,
A cylindrical sieve container 20 having a vertical axis is provided. In the present example, the upper end of the sieving container 20 is basically opened, and the flexible cleaning material is scattered between the upper end of the sieving container 20 and the lower end of the lower hopper of the blast chamber 5. It is covered by the prevention member 21. The scattering prevention member 21 is preferably made of a flexible mesh having a fine mesh that does not allow the polishing agent to pass therethrough, since the burr sieving action, which will be described later, inside the sieving container can be visually confirmed and checked from above. Is.

In the portion above the sieving container 20 from above,
A sieving plate 22 having a mesh size that allows only the abrasive material to pass therethrough and does not allow dust such as burrs larger than that to pass through is stretched in the horizontal direction. And
A guide tube 23 extending downward from the lower end of the lower hopper portion of the blast chamber 5 extends to the vicinity of the upper surface of the central portion of the sieving plate 22. This is to prevent the polishing / cleaning material containing burrs falling from the hopper from being scattered over the entire upper surface of the sieving plate 22 and being discharged together with the burrs. Further, on the side wall of the sieving container 20, directly above the sieving plate 22, the sieving plate 2
A burr discharge port 24 for discharging the burr which has been sieved is provided on the upper part 2.

On the other hand, the polishing / cleaning material recovery pipe 10 is connected to the bottom wall of the sieving container 20, and the polishing / cleaning material which has passed through the sieving plate 22 and dropped downward is guided by a sloped guide 25. After being collected on one side of the lower part of the sieving container, it is conveyed from the abrasive cleaning material recovery pipe 10 to the abrasive cleaning material storage chamber 4.

Further, in the present invention, in particular, a plurality of external air introducing holes 26 are provided in the side wall of the sieving container 20 located below the sieving plate 22. Further, in this embodiment, the funnel-shaped guide plate 27 is arranged so that the central lower end opening is located slightly lower than the external air introducing hole 26.
It is provided so that the peripheral portion thereof is held on the inner periphery of the sieving container 20 above the portion where the is provided. By doing so, the polishing and cleaning material that has passed through the sieving plate 22 will not accidentally leak to the outside from the external air introducing hole 26, and at the central portion of the sieving container 20 separated from the external introducing hole 26. Will be dropped below it.

There are various forms of the vibrating body for applying a predetermined three-dimensional vibration to the sieving container 20 or the sieving plate 22 arranged inside the sieving container 20. The oscillating body 27 driven by a motor is directly attached to the outer wall portion of the sieving container 20.

The operation of the above embodiment will be described below. In the operating state, the high speed airflow is continuously supplied to the blast nozzle 6 through the air supply hose 8 by the operation of the external air supply source. At this time, the polishing / cleaning material sent through the polishing / cleaning material supply hose 7 is mixed with the high-speed air stream and is sprayed from the tip of the blast nozzle 6, and is introduced or carried into the blast chamber by the spraying of the polishing / cleaning material. As described above, the blast process is performed on the workpiece. The dust collecting device 11 and the vibrating sieving device 9 are both connected to the suction blower 16 or the vibrating body 2.
Activated by activating 7. The vibrating sieving device 9 in the operating state is three-dimensionally vibrated by the vibrating body 27. This three-dimensional vibration causes the granular material that is dropped onto the sieving plate 22 to be sieved, as shown in FIG. As shown, it is set to be spirally moved from the central portion toward the peripheral portion.

Abrasive material recovery pipe 1 when the apparatus is in operation
Negative pressure generated by the suction blower 16 of the dust collector 11 acts on the bottom of the sieving container 20 through 0. However, in the present invention, the external air introducing hole 26 described above is provided on the side wall of the sieving container 20. Is provided, the external air is introduced into the sieving container through the air introduction hole 26, and this is sucked into the blasting / cleaning material recovery pipe to carry the blasting / cleaning material by air. Therefore, even if the negative suction pressure acts on the lower portion of the sieving container 20 as described above, a strong air flow passing from the above-mentioned sieving plate 22 from above to below does not occur. Therefore, the abrasive cleaning material containing burr dropped from the blast chamber 5 through the guide tube 23 and onto the sieving plate 22 promptly causes burrs together with the fact that the sieving plate is vibrating three-dimensionally. Only the sieving remains on the sieving plate.
The burr thus screened on the sieving plate does not come into close contact with the sieving plate due to the air flow flowing from the top to the bottom, and swiftly moves on the sieving plate and spirally moves to the peripheral portion. And is continuously discharged from the burr discharge port 24 to the outside.

In this embodiment, as described above, the guide tube 23 is extended from the lower hopper portion of the blast chamber so that the polishing and cleaning material is dropped only on the central portion of the sieving plate 22. The abrasive material does not scatter all over the sieving plate and is discharged to the outside from the burr discharge port 24 together with the screened burrs. Further, in the present embodiment, as shown in FIG. By providing a guide wall 28 that prevents the granular material on the sieve plate from moving directly in the radial direction between the burr discharge port 24 and the burr discharge port 24, the abrasive material is accidentally discharged from the burr discharge port 24. It is more reliably prevented from being done.

The cleaning and cleaning material that has passed through the sieving plate 22 is dropped to the lower part of the sieving container 20 while being collected in the central part by the funnel-shaped guide plate 27, and collected on one side of the bottom wall by the sloped guide 25. After that, the air is introduced into the sieving container through the external air introduction hole 26 and is collected in the polishing / cleaning material storage chamber 4 by the air flow sucked from the bottom into the polishing / cleaning material recovery pipe 10.

As described above, dust such as burrs larger than the particle size of the abrasive cleaning material, which is scraped off from the work as a result of the blasting and mixed in the abrasive cleaning material, is especially included in the blasting apparatus of the present invention. The device 9 reliably and quickly screens and discharges to the outside. Since such dust is continuously discharged all the time, a fixed installation type sieving plate is provided to stop the entire device at regular intervals like the conventional example of sieving burrs and the like. The need for cleaning the sieving plate by doing so is completely unnecessary, and the continuity of the blast treatment is dramatically improved.

Of course, the scope of the present invention is not limited to the above embodiments. For example, as the vibrating body for generating three-dimensional vibration in the sieving container in the above embodiment, a type in which the oscillating body is directly attached to the side wall of the sieving container is adopted. It suffices that the sieved particles give a three-dimensional vibration that is sent to the peripheral portion while making a spiral motion, and as a mechanism for generating such a three-dimensional vibration,
The vibration generating mechanism used in the circular vibrating screener manufactured and sold as KF type, KFO type, KG type or KGO type by Koa Kogyo Co., Ltd. can be adopted.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an overall configuration of a preferred embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

[Explanation of symbols]

 1 Blasting device 3 Main body container 4 Abrasive cleaning material storage chamber 5 Blasting chamber 6 Blast nozzle 9 Vibratory sieving device 10 Abrasive cleaning material recovery pipe 20 Sieve container 22 Sieve plate 24 Burr discharge port 26 External air inlet

Claims (2)

[Claims] 1. A blast chamber, a polishing / cleaning material storage chamber provided in an upper portion of the blasting chamber, and an inside of the blasting chamber, which is sent from the polishing / cleaning material storage chamber to air sent from an air supply means. Equipped with a blast nozzle that mixes and jets abrasives, so that the abrasives dropped to the lower part of the blast chamber can be collected in the abrasives storage chamber by suction negative pressure through the abrasives recovery pipe. In the configured blasting device, a vibrating sieving device is provided in the lower part of the blasting chamber, the vibrating sieving device is given a predetermined vibration by vibrating means, and the upper part is lower than the lower part of the blasting chamber. A sieving container connected so as to be capable of relative vibration, and a sieving plate which is horizontally stretched in the sieving container and sifts burrs mixed in the polishing and cleaning material, and the sieving plate on the side wall of the sieving container. External air inlet below While providing the above, while connecting the abrasive cleaning material recovery pipe to the lower part of the sieving container, immediately above the peripheral edge of the sieving plate on the side wall of the sieving container, a burr discharge port for discharging the burr screened by the sieving plate. A blasting device characterized by being provided with. 2. The vibrating sieving device is one in which three-dimensional vibration is applied by the vibrating body so that the burr sieved on the sieving plate moves spirally toward the peripheral portion. The blasting device according to claim 1.