JPH067890Y2 - Blast processing equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an apparatus adapted to perform blasting in a cyclone chamber for processing a surface of a workpiece by spraying a cleaning material on the surface of the workpiece. .

[Prior art]

When the matte finish, cleaning or other treatment is applied to the surface of a work piece such as polyester film, paper, metal foil or glass, a processing method generally called sand blast is adopted, but this is supplied from an air pressure source. A cleaning material made of, for example, sand or iron powder is mixed in the compressed air, and then the surface of the workpiece is sprayed through a blast nozzle so that the surface is cleaned. It is a thing.

However, when performing this type of blasting, a compressor, a blower or the like is usually used as an air pressure source for obtaining high pressure air, as shown in Japanese Patent Laid-Open No. 59-209765, and this is also used. Along with this, blast nozzles having a relatively small diameter are used. In addition, a spray grinding means using a spiral air flow using a cyclone device as the air pressure source is disclosed in, for example, Japanese Patent Laid-Open No.
No. 0-34269 is proposed.

[Problems to be solved by the invention]

By the way, in the above-mentioned conventional blasting, as described in JP-A-59-209765, the operator himself / herself performs the above-mentioned work of spraying the polishing / cleaning material in the polishing / cleaning chamber. Therefore, in order to remove a large amount of dust that accompanies the work and to collect reusable abrasive cleaning material, a large dust collector or a centrifugal separator other than the above abrasive cleaning chamber and compressor is used. It is necessary to separately provide a cyclone device or the like that separates and collects the abrasive cleaning agent by using the force, which causes a problem that the entire blast system becomes extremely large.

In addition to the case where the blasting is performed manually, even when the blasting is automatically performed by fixing the blasting nozzle and sending the workpiece in one direction, According to the conventional system, the polishing and cleaning material ejected from the blast nozzle will fly up into the air even if it comes into contact with the surface of the workpiece once, and as described above, the blast nozzle with a relatively small diameter. However, the work efficiency is extremely poor because it is often used, and therefore, it takes a lot of time and energy especially when processing a workpiece having a large surface area.

The present invention addresses the above-mentioned problems associated with blasting, and when performing blasting using a cyclone device, the blasting is performed in a cyclone chamber, thereby reducing the size of the entire system and consuming less work. The blast process is performed efficiently with energy, and the work environment is not deteriorated due to dust or the like.

[Means for solving problems]

The blasting device of the present invention has an upper part having a substantially semi-cylindrical shape, a lower part formed in a funnel shape, and a lower end provided with a discharge port for polishing and cleaning material to a central axial center position of the upper part. A pipe having an air intake hole formed on the peripheral surface is provided laterally, and an outer end of this pipe and a nozzle for supplying pressurized air tangentially to the chamber from a discharge port opened in the cyclone chamber are provided via a blower. An air circulation path is formed by communicating with each other, and a polishing / cleaning material mixing portion is further provided in the circulation path from the blower to the discharge port, and the work piece is provided in the upper direction of the discharge port in the upper portion of the cyclone chamber. It is characterized in that a notch portion that faces the above is formed.

[Action]

According to the present invention, the air in the cyclone chamber is sucked by the blower through the pipe in the chamber, and the air is tangentially pumped into the upper portion of the cyclone chamber through the nozzle from the discharge port at the tip, so that the air is introduced into the chamber. The swirl flow is formed by the air, and the air in the central portion of the swirl flow is sucked into the pipe again to form the one-way air circulation system passage. On the other hand, a required polishing / cleaning material is supplied by the polishing / cleaning material mixing section provided in the circulation path leading to the discharge port, and further, a notch portion is provided in front of the discharge port to face the workpiece. As a result, the desired blasting will be performed in the cyclone chamber. However, the above-mentioned polishing / cleaning material repeatedly comes into contact with the workpiece while swirling the outermost peripheral portion of the air swirl flow due to the action of centrifugal force, and the polishing / cleaning material that has consumed the kinetic energy is taken out of the room through the outlet below. It is issued.

〔Example〕

The present invention will be described below with reference to the embodiments shown in the drawings.
In the figure, 1 is an airtight cyclone chamber 2 and a blower 3
A blasting machine having the cleaning and cleaning material supply part 4 and the work piece supply part 5 as main constituent elements, and the cyclone chamber 2 has an upper part 2a having a substantially semi-cylindrical shape when viewed from one side, and a lower part. The portion 2b is squeezed downward so that the side cross section has a funnel shape, and one bottom portion 2c is inclined toward the other side as shown in FIG. Are formed. Reference numeral 2e designates a space formed by bulging the upper piece of the cylindrical upper portion 2a of the cyclone chamber 2 outward, and the horizontal upper surface 2f has a third portion.
As shown in the drawing, a wide cutout portion 2g is formed in the width direction of the cyclone chamber 2 (the left-right direction in FIG. 2) and the lower surface is an inclined surface 2h. Reference numeral 2a 'designates an auxiliary plate which extends in an arc shape toward the upper middle position of the bottom portion 2c as the same curved surface as the inner surface of the cylinder of the upper portion 2a, if necessary or by adjusting the protruding length.

Furthermore, on the peripheral surface inside the cyclone chamber of the pipe 6 connected to the suction side of the blower 3, the other end 6b taken out of the chamber is provided at the center of the upper portion 2a of the cyclone chamber 2 so as to close the one end 6a. Many air intake holes 6c ...
Since the air is sent under pressure from the nozzle 7 which will be described later to the inside of the chamber 2 when the blower 3 is operated, the air is sucked into the blower 3 through the pipe 6 through the circulation path indicated by the arrow A. There is. On the other hand, the base of a nozzle 7 is connected to the discharge side of the blower 3, and the nozzle is provided with a polishing / cleaning material mixing part 7a in the middle part thereof, and the tip discharge port 7b has a flat wide width from the space 2e to the cyclone chamber. It is open. The polishing / cleaning material supply unit 4 is composed of a polishing / cleaning material storage tank 8 and a transporting section 10 having a screw conveyor 9 in the horizontal direction therein. A plurality of branch ports 10b arranged in parallel at the lower part of the outlet part 10a of the nozzle 7 supply the nozzle 7 into the mixing part 7a of the nozzle 7 in the width direction on average.
Reference numeral 11 is a conduit for supplying excess polishing and cleaning material which connects the transportation end portion of the transportation portion 10 and the inside of the cyclone chamber 2 below the space 2e, and 12 is a polishing and cleaning material provided at the outlet portion 10a of the nozzle 7. It is a supply amount adjusting plate. Further, the workpiece supply unit 5 makes the workpiece a in a wound state by facing the lower peripheral surface into the chamber 2 through a notch 2g formed in the upper surface 2h of the space 2e in the cyclone chamber 2. Roller 13 moving in the direction
And two guide rollers 14 arranged in parallel on the upper sides of both sides.

However, the above-mentioned flat and wide discharge port 7b of the nozzle 7 is
In order to supply air into the cyclone chamber 2 from its tangential direction, it is opened in a predetermined direction on the inclined surface 2h of the space 2e in the chamber, and is transferred by the roller 13 in the direction of the discharge port 7b. The notch 2g that faces the workpiece a to be processed is located. Then, the air pressure-fed from the blower is blown into the cyclone chamber 2 through the nozzle 7 from the discharge port 7b at the tip through the circulation path indicated by the arrow A and swirls in the chamber. Although not shown, the roller 13 is preferably wrapped with a conductive rubber for discharging static electricity. Further, the roller 13 is not limited to one as shown in the drawing, but is provided with an appropriate interval. The two work pieces are installed in parallel so that the work piece can be placed in a planar state in the cyclone chamber 2
You may let them face you.

Reference numeral 15 in the figure is a discharge port 2d provided below the cyclone chamber 2.
And a polishing / cleaning material recovery passage for connecting the polishing / cleaning material supply port 8a of the storage tank 8 to each other. Further, the dust outlet 8b provided on the upper portion of the storage tank 8 is connected to an external dust collector (not shown). Of.

According to the above configuration, the air sucked into the blower 3 through the pipe 6 from the central portion of the axial center in the cyclone chamber 2 is pressurized by the blower 3, and then the tangent to the cyclone chamber 2 through the nozzle 7. Since it is supplied again from the direction, a swirling flow of air is formed in the cyclone chamber 2. At this time, the polishing / cleaning material is supplied from the polishing / cleaning material mixing section 4 through the polishing / cleaning material mixing section 7a of the nozzle 7 and mixed into the air, and at the same time, the air having a flat and wide width in the cyclone chamber is supplied. Since the workpiece a is supplied in the direction of the discharge port 7b,
The abrasive material is sprayed from the discharge port 7b toward the workpiece a, and then swirls in the cyclone chamber 2 along with the air swirling flow. As a result, the abrasive cleaning agent swirls around the outermost peripheral portion of the air swirling flow by the action of centrifugal force, its kinetic energy is weakened, and the discharge port 2d below
The blasting efficiency of this kind is remarkably improved by repeatedly coming into contact with the work piece until it falls to. Further, since the polishing / cleaning material is blown onto the work piece a by the wide discharge port 7b of the nozzle 7 along with a large amount of air discharged from the blower 3, the work piece having a wide width such as a long work piece is blown. Also, blasting can be performed extremely efficiently with relatively small energy consumption.

In particular, according to the above configuration, since the blasting of the work piece is performed in the airtight cyclone chamber 2, the working environment becomes very good, and the conventional grinding and sweeping chamber is unnecessary, and this type of system is provided. The whole is significantly simplified and miniaturized. Further, the air in the central part of the cyclone chamber 2, that is, the central part of the air swirling flow generated in the cyclone chamber 2 is sucked by the blower 3 and then supplied again from the blower 3 into the cyclone chamber 2. Flow becomes smooth,
Along with this, the drive loss of the system is significantly reduced.

[Effect of device]

According to the present invention, not only when the abrasive material is sprayed onto the work piece from the nozzle, but also after that, the abrasive material can be repeatedly abutted against the work piece while rotating.
As a result, the efficiency of this type of blasting can be significantly improved. Further, since the blasting of the work piece is performed in the airtight cyclone chamber, the grinding and sweeping chamber, which was conventionally required for performing this type of work, becomes unnecessary, and as a result, the working environment is deteriorated due to dust and the like. Without inviting, the entire blast system will be greatly simplified and at the same time miniaturized.

Further, since the air is sucked from the central portion of the cyclone chamber, that is, the central portion of the air swirling flow generated in the chamber and is supplied again to the chamber, energy is not wasted, and therefore the energy consumption is significantly reduced. Will be. Also,
The present invention enables wide blasting by widening the nozzle outlet and the notch.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a vertical cross-sectional side view showing a part of the invention, FIG. 2 is a partially cutaway front view, and FIG.
The drawing is an enlarged cross-sectional view of a main part taken along line III-III in FIG. Reference numeral 1 is a blasting machine, 2 is a cyclone chamber, 3 is an air circulation system passage (blower), 4 is an abrasive cleaning material mixing section, 5 is a workpiece supply section, 7 is a nozzle, 7a is a mixing section, and 2g is a cutout section. .

Claims (1)

[Scope of utility model registration request] 1. An air intake to a central axial center position of the upper part in a cyclone chamber in which the upper part is formed in a substantially semi-cylindrical shape, the lower part is formed in a funnel shape, and a polishing / cleaning material discharge port is provided at the lower end. A pipe having holes formed in the peripheral surface is provided laterally, and the outer end of the pipe is connected to a nozzle for supplying pressurized air tangentially into the cyclone chamber through a discharge port through the blower. This forms an air circulation path, and further, a part for mixing the polishing and cleaning material is provided in the circulation path from the blower to the discharge port, and the workpiece is placed in the upper part of the cyclone chamber in the direction front of the discharge port. A blasting machine characterized by forming a notch.