KR20130091802A - Apparatus for blasting process preventing abbrasives and dust from adhering to the inner wall of the blasting process chamber - Google Patents

Abstract

The blast processing apparatus for performing a blast processing by spraying an injection material toward a to-be-processed object from a blast processing nozzle WHEREIN: The blast processing chamber which suppressed adhesion of an injection material and dust to the inner wall of a blast processing chamber is provided.
By sucking outside air into the blast processing chamber on the ceiling surface or the side wall surface of the blast processing chamber, and having at least one outside air suction port for allowing the sucked outside air to flow along the inner wall surface of the blast processing apparatus, it is sucked into the blast processing chamber. The adhesion of the abrasive and dust is inhibited by the flow of the outside air.

Description

BLAST PROCESSING EQUIPMENT WITH BLAST PROCESSING STORAGE WITH INSPECTION OF INSPECTION MATERIALS AND DIAGNOSIS TO INTERNAL WALL SIDE OF THE BLASTING PROCESS CHAMBER}

This invention relates to the blast processing apparatus which performs a blast processing by making an injection material collide with the surface of a to-be-processed object.

Blast processing has been used in the field of surface treatment, such as roughening of the workpiece, smoothing finish, surface roughness adjustment, chamfering, burr removal, end face processing (rounding), and removal of molten metal from the casting. In recent years, blasting has also been used in fine processing such as etching using a fine spray material. The injection material injected from the blast processing nozzle installed in the blast processing chamber and the dust generated by blast processing (hereinafter referred to simply as "dust") are recovered by suction means (generally, a dust collector) connected through a duct. , Part of which is attached to the inner wall surface. In many cases, a window for confirming the blasting state is disposed on the inner wall surface, and it is difficult to confirm the blasting state by adhering the injection material and the dust to the window. In addition, the injection material and dust gradually accumulate on the inner wall surface, and if the amount of deposition of the injection material or the like exceeds the adhesion to the inner wall surface, it falls at once. The workpiece to which the blast processing is completed is ejected to the outside of the blast processing chamber after removing the spraying material and dust adhering to the workpiece in the blast processing chamber, so that the spraying adhered to the inner wall surface of the blast processing chamber at the time of taking out the workpiece. When the ash and dust fall, the injection material and dust adheres to the workpiece again, and leaks the injection material and dust out of the blast processing chamber, which is not preferable in the working environment.

A blast processing apparatus which connects a compressed air source to the ceiling surface of a blast processing chamber, and flows compressed air generated from a compressed air source to the inner wall surface of a blast processing apparatus as a method of preventing adhesion of the injection material to the inner wall surface of a blast processing chamber. Is proposed (patent document 1). In this apparatus, since the compressed air introduced into the blast processing chamber needs to be sucked by the suction means, the suction means is enlarged.

Japanese Laid-Open Patent Publication No. 2001-334466

In view of the above reasons, the present invention provides a blast processing apparatus having a simple structure in which no abrasive and dust adhere to the inner wall surface of the blast processing chamber.

The blast processing apparatus of this invention is a blast processing chamber for performing a blast processing by spraying an injection material toward a to-be-processed object from the blast processing nozzle provided in the inside, and suction for sucking in the said blast processing chamber. The blasting processing chamber is provided with a means, and the outside blast processing chamber draws outside air into the blast processing chamber, and at least one outside air suction port is provided so that the sucked outside air flows along the inner wall surface of the blast processing apparatus. (First invention)

Moreover, in the blast processing apparatus of 1st invention, the external air flow for rectifying outside air and sucking it in the said blast processing chamber on the outer wall surface side of the said blast processing chamber provided with the said outside air suction opening. ) A rectifying member can be arranged. (2nd invention)

In the blasting apparatus according to the second invention, the external air rectifying member is a hollow member having both ends opened, and one of the opening surfaces is attached to the outer wall surface of the blast processing chamber. And the outside air suction port can be connected. (3rd invention)

Moreover, in the blast processing apparatus of 3rd invention, the said airflow rectifying member can make the cross section of the direction orthogonal to the said opening surface into a rectangle. (4th invention)

Moreover, in the blast processing apparatus as described in 3rd invention, the said airflow rectification member is a shape which bent the cross section of the direction orthogonal to the said opening surface in a U shape or L shape, or a No shape. It can be made into any one of a curved shape. (5th invention)

Moreover, in the blast processing apparatus as described in a 1st or 2nd invention, in the said blast processing chamber, the airflow guide member which guides the outside air attracted by the said outside air suction port to flow along an inner wall surface can be arrange | positioned. (6th invention)

Moreover, in the blast processing apparatus of 6th invention, the said airflow induction member whose one end surface was fixed to at least one of the ceiling surface and the side wall surface in the said blast processing chamber is plate-shaped, The said airflow induction member is The longitudinal section orthogonal to the ceiling surface and / or side wall surface of the said blast processing chamber fixedly attached can be made into a rectangle. (7th invention)

Moreover, in the blast processing apparatus of 6th invention, the said airflow induction member whose one end surface was fixed to at least one of the ceiling surface and the wall surface of the said blast processing chamber is plate-shaped, and the said airflow induction member is fixed The longitudinal section orthogonal to the ceiling surface and side wall surface of the said blast processing chamber can be made into any of the shape bent in a "-shape", or the shape curved in a "no" shape. (Eighth invention)

In the blast processing apparatus according to the seventh or eighth invention, the angle formed between the outside air induction member and the inner wall surface of the side on which the outside air flow of the inner wall surface on which the outside air induction member is fixed is introduced is formed by 90 °. It can be set as follows. (9th invention)

Further, in the blast processing apparatus according to the ninth invention, the outside air flow guide member can be arranged to guide the outside air sucked by the outside air suction port along the inner wall surface of the outside air suction port. 10th invention)

Further, in the blast processing apparatus according to the sixth invention, in the blast processing chamber, an air flow guide member for guiding the air flow generated inside the blast processing chamber to flow along the inner wall surface can be disposed. (Eleventh invention)

Further, in the blast processing apparatus according to the eleventh invention, the air flow guide member is, for example, a flat plate having a rectangular plate shape, and the blast processing is performed on both end surfaces in parallel with the air flow guide member. It can be fixed to the side of a thread, respectively. (12th invention)

Moreover, in the blast processing apparatus of 12th invention, the longitudinal cross section of the said airflow induction member orthogonal to the inner wall surface is bent in a U-shape to the inner wall surface of the said blast processing chamber fixedly attached to the said airflow induction member. It can be any one of the shape curved in one shape or a No-shape. (13th invention)

Moreover, in the blast processing apparatus of 11th invention, the said internal airflow guide member can be arrange | positioned at the position of the side away from the said external air | airflow induction member, and away from the said external air suction port. (14th invention)

Further, in the blast processing apparatus according to the eleventh aspect of the invention, the airflow inducing member has a cross-sectional side farther from the outside air suction port than the cross-sectional side of the blast processing chamber with an inner wall close to the outside air suction port. Therefore, it can be made narrower. (15th invention)

Further, in the blast processing apparatus according to the sixth invention, when the outside air induction member is attached to the ceiling surface, the side wall surface of the blast processing chamber is formed on the ceiling inner wall surface of the blast processing chamber of the outside air induction member. The backflow inhibiting member can be disposed at a position farther from the outside air suction port than the stage on the side opposite to the stage to which it is fixed. (16th invention)

Further, in the blast processing apparatus according to the eleventh invention, when the outside air induction member is attached to the ceiling surface, the end of the outside air induction member is fixed to the ceiling inner wall surface of the blast processing chamber. A backflow inhibiting member can be fixedly attached to the side wall surface of the blast processing chamber that is farther from the outside air suction port of the airflow induction member and further away from the outside air suction port of the airflow induction member. )

Further, in the blast processing apparatus according to the sixteenth or seventeenth invention, the cross sectional area orthogonal to the direction away from the outside air suction port of the backflow inhibiting member is made larger toward the direction away from the outside air suction port of the blast processing chamber. (18th invention)

Further, in the blast processing apparatus according to the eighteenth aspect of the invention, a longitudinal section of the backflow inhibiting member orthogonal to the ceiling surface and the sidewall surface of the blast processing chamber to which the external air induction member is fixedly attached may be a triangle. 19 invention)

At the time of blast processing, the inside of a blast processing chamber is attracted by a suction means, and it becomes a negative pressure atmosphere. By placing the outside air suction port on the wall surface of the blast processing chamber, the outside air is sucked (introduced) into the blast processing chamber. By placing an outside air suction port at a position along the inner wall surface of the blast processing chamber where the flow of outside air sucked into the blast processing chamber (hereinafter referred to as `` outdoor air ''), spraying material and dust adhere to the inner wall of the blast processing chamber. Can be prevented (first invention). At this time, when the airflow rectifying member is disposed on the outer wall surface side of the blast processing chamber of the outside air suction port, the outside air flow is rectified by the outside airflow rectifying member, and is then sucked into the blast processing chamber through the outside air suction port. The suction can be efficiently sucked into the blast processing chamber (second invention). The outside air flow rectifying member is a hollow member having both ends opened, and one of the opening surfaces is fixedly attached to the outer wall surface of the blast processing chamber, and is connected to the outside air suction port (third invention). The cross section orthogonal to the opening face of the airflow rectifying member may be a rectangular shape, a shape bent in an L shape or a U shape, a shape curved in a no shape, or any shape (fourth and fifth inventions). . Further, by arranging the outside air induction member in the blast processing chamber, the outside air can be efficiently formed along the outer wall to prevent adhesion of the injection material and dust (sixth invention). It is preferable to make the external air induction member into a plate shape, and to fix one end surface of the plate to the ceiling surface or the side wall surface of the blast processing chamber. When the longitudinal section of the external air induction member orthogonal to the inner wall surface of the blast processing apparatus to which the external air induction member is fixedly attached is a rectangular shape, the production of the blast processing chamber is very simple (seventh invention). In addition, the longitudinal section may be bent into a U-shape or curved into a no-shape so that outside air flows along the inner wall surface efficiently (Eighth Invention). At this time, it is preferable that the angle formed between the outside air induction member and the inner wall surface on the side where the outside air flow is introduced into the inner wall surface on which the outside air induction member is fixedly attached is set to 90 ° or less (ninth invention). The outside air introduction member may be arranged such that the outside wall flows along the inner wall surface at which the outside air suction port is arranged to follow the inside wall surface perpendicular to the inside wall surface where the outside air suction port is arranged. The outside air introduction member can be suitably used to allow the outside air flow to flow along the inner wall surface on which the outside air suction port is disposed (tenth invention).

As the outside air sucked away from the outside air suction port becomes weak, the airflow is weakened, and the force for preventing adhesion of the injection material and dust is reduced. On the other hand, in the blast processing chamber, since air flow (hereinafter referred to as "heat flow") flowing toward the suction means is generated, the air flow can be guided to the inner wall surface by disposing the air flow guide member in the blast processing chamber. (The eleventh invention). The airflow guide member is, for example, a flat plate having a rectangular plate shape, and both end surfaces in parallel with the airflow guide member are fixedly attached to the side surfaces of the blast processing chamber, whereby the airflow flows efficiently into the inner wall surface. Can be derived (Twelfth invention). It is preferable that the longitudinal section of the external air induction member orthogonal to the inner wall surface to which the external air induction member is fixed is bent in a U shape or curved in a No-shape (Thirteenth invention). In addition, by placing the outside air induction member at a position away from the outside air intake port, away from the outside air induction member, the flow of the outside air drawn in from the outside air intake port without affecting the aspiration of the outside air is prevented. It can lead to a desired part, such as a weakened part (14th invention). In addition, the airflow guide member has a narrower cross-sectional side that is farther from the outside air intake port than the cross-sectional side of the blast processing chamber close to the outside air intake port, so that the flow of the outside air drawn from the outside air intake port is reduced. The airflow can be efficiently induced to the desired part such as the weakened part (15th invention).

Particularly in the air blast which injects the injection material together with the compressed air, the compressed air (hereinafter referred to as "injection") injected from the blasting nozzle collides with the inner wall surface of the workpiece or the blast processing chamber, and part of It is reflected toward the ceiling surface direction (upward direction). The airflow generated by the reflection prevents the airflow sucked from the outside air suction port and the airflow guided to the inner wall surface by the airflow guide member by the reflection airflow. By providing the backflow inhibiting member, it is possible to prevent the flow of the outside air and the inside air caused by the reflected flow from being inhibited (16th invention). When the airflow guide member is fixedly attached to the blast processing chamber, it is preferable to provide the airflow guide member at a position farther from a cross section on the side farther from the outside air suction port of the airflow guide member (17th). invent). By increasing the cross-sectional area orthogonal to the direction away from the outside air intake port of the backflow inhibiting member toward the direction away from the outside air intake port of the blast processing apparatus, the flow of outside air and internal air flow is provided by the installation of the backflow inhibiting member. This case does not occur. It is particularly preferable that the longitudinal section is triangular (18th and 19th inventions).

1 is a schematic view illustrating a configuration of a blast processing apparatus in this embodiment.
FIG. 2 is a schematic view showing the configuration of a blast processing chamber in the present embodiment, in which FIG. 2A is a front view, and FIG. 2B is a view seen from the arrow A direction in FIG. (Right side view), FIG. 2 (C) is the figure seen from the arrow B direction in FIG. 2A, FIG. 2 (D) is sectional drawing along the CC line in FIG. 2B, FIG. (E) is sectional drawing along the DD line in FIG. 2A, and FIG. 2 (F) is sectional drawing along the EE line in FIG.
It is explanatory drawing which shows the flow of external air flow by the external air suction opening in this invention.
4 is a schematic view showing an outside air induction member according to the present invention, FIG. 4A is an explanatory diagram for explaining an installation state, and FIG. 4B is an explanatory diagram for explaining a modification.
It is a schematic diagram which shows the installation example of the outside air flow guide member in this invention.
It is a schematic diagram which shows the example of installation of the airflow guide member in this invention.
It is a schematic diagram which shows the flow of the jet stream when the backflow inhibiting member in this invention is provided.
8 is a schematic view showing the form of the reflux inhibiting member in the present invention.

An example of embodiment of the blast processing apparatus in this invention is demonstrated using drawing as an example using a sand blast apparatus. In addition, this invention is not limited to embodiment described in this specification, It can change suitably as needed. For reference, in the following description, the up, down, left and right directions will be described as up, down, left and right directions (with the ceiling side as the up direction) unless otherwise specified. In addition, the inner wall surface in this specification represents the ceiling surface and side wall surface in a blast processing chamber unless there is particular notice.

The blast processing apparatus 1 includes a blast processing chamber 10 in which a blast processing nozzle 11 (suction type in this embodiment) is disposed inside, and a duct connected to a bottom portion of the blast processing chamber 10 ( And a suction means 20 (dust collector in this embodiment) for generating a suction force and recovering the powder, which is connected via D). Moreover, the separating means 21 (cyclone type | mold classification apparatus in this embodiment) for separating the reusable injectable material, the non-reusable injectable material, and dust from the injecting material and dust is arrange | positioned.

A compressed air supply source (not shown) is connected to the blasting nozzle via a hose (not shown). Blast processing of a to-be-processed object is performed by spraying the injection material toward the to-be-processed object W with the compressed air which generate | occur | produced from the compressed air supply source. The injection material generates cracks or defects in a part thereof due to collision with the workpiece W, and the like. In addition, the surface of the workpiece W is ground by collision with the injection material to generate dust. These jetting materials and dusts fly in the blast processing chamber, and they are attracted by the suction force generated from the suction means 20 and are transferred to the separating means 21. The spraying material and dust transferred to the separating means 21 are classified into spraying material and dust (light powder) which cannot be reused due to cracks or defects, and reusable spraying material (heavy powder), and reused. Injectable material and dust cannot be recovered by the suction device 20. On the other hand, the reusable spraying material is stored in the spraying material hopper 22, transferred back to the spraying nozzle through the hose H, and sprayed together with the compressed air again to perform blast processing (see FIG. 1).

The inside of the blast processing chamber 10 is sucked by the suction means 20, that is, in a negative pressure atmosphere, so that the outside air is disposed in the blast processing chamber 10 by arranging the outside air suction port 12 on the wall surface of the blast processing chamber 10. It is sucked into (introduced). The outside air suction port 12 is disposed so that the flow of outside air to be sucked is along the inner wall surface of the blast processing chamber 10. The abrasives and dusts are charged with static electricity due to friction from the blasting nozzle 11 or collision with the workpiece W, adsorption of moisture or oil in the atmosphere and compressed air, intermolecular forces, and irregularities. The blast processing chamber 10 adheres to the inner wall surface due to the cause, and the adhesion of the injection material and the dust is hindered by the suctioned outside air flowing along the inner wall surface. In the case of preventing the adhesion to the ceiling surface 10a among the inner wall surfaces of the blast processing chamber 10, the fabric is to be prevented from being attached to the upper side of the side wall surface 10b and the side wall surface 10b. What is necessary is just to arrange | position the said outside air suction opening 12 in the side wall side among the front faces 10a, and may combine these. Moreover, it is preferable that the said outdoor air suction opening 12 arrange | positions the outdoor airflow rectification member 12f in the outer wall surface side of the said blast processing chamber 10 with respect to the said outdoor air suction opening 12 (FIG.3 ( See A). Since the outside air is rectified and flows from the outside of the blast processing chamber 10 to the inside of the outside air rectifying member 12f, the air flow in the blast processing chamber 10 flows near the outside air suction port 12. Even when the vector toward the outside of the is large, the rectified outside air can efficiently suck the outside air into the blast processing chamber 10 without flowing out to the outside. 12 f of external air flow rectifying members are arrange | positioned toward the outer direction of the blast processing chamber 10 from the outside air suction opening 12, and if the external air to suck | suck can be rectified, the shape and the blast processing chamber 10 The angle and size of the sidewalls of are not particularly limited. For example, as shown in FIG. 3 (B), the air flow rectifying member 12f may have any arbitrary appropriate angle, not right angle, with respect to the wall surface of the blast processing chamber 10, and the R surface. You may use the curved external air rectifying member 12f which has the following. In addition, as shown in FIG. 3C (FIG. 3C corresponds to a cross-sectional view along the AA line in FIG. 3A), a plurality of outside air suction ports 12 are arranged on the same line. When there is, the outside air flow rectifying member 12f may be disposed for each of the outside air suction openings 12, and the outside air flow rectifying member 12 may be disposed on the entire outside air suction opening 12 so as to cover all the outside air suction openings 12. 12f) may be disposed.

In the blast processing chamber 10, an airflow guide member 13 for guiding outside air sucked into the inner wall surface to prevent adhesion is provided. The airflow guide member 13 is formed of a plate-shaped member, and one end surface thereof is fixedly attached to the ceiling surface 10a or the side wall surface 10b of the blast processing apparatus 10 (FIG. 4A). Reference). The longitudinal cross section orthogonal to the inner wall surface to which the outside air induction member 13 is fixedly attached may be any one of a rectangle, a shape curved in a "-shape", and a shape curved in a no-shape. At this time, it is preferable that the angle θ formed between the external air induction member 13 and the inner wall surface of the side on which the external air flow is introduced into the inner wall surface to which the external air induction member 13 is fixed is set to 90 ° or less. . When θ is larger than 90 °, the amount of outside air flowing along the inner wall surface of the blast processing chamber 10 is reduced, and the force for inhibiting the adhesion of the above-described spray material and dust is weakened (see FIG. 4B). ). In addition, the outer air induction member 13 may be fixedly attached to one end surface on the inner wall surface orthogonal to the inner wall surface on which the outside air suction port is arranged, as shown in FIG. 5A. As shown in B), one end surface may be fixedly attached to the inner wall surface where the outside air suction port is arranged. The former may change the direction in which the sucked outside air flows, and the latter may rectify the outside air so that it does not flow away from the inner wall surface immediately after being sucked into the blast processing chamber 10. When the outside air induction member 13 is provided with a plurality of the outside air intake ports 12, the outside air induction member 13 is disposed on the inner wall surface where the outside air intake ports 12 are arranged according to the purpose. One of the case where the end is fixedly attached to the orthogonal inner wall surface, the case where the one is fixedly attached to the inner wall surface on which the outside air suction port 12 is arranged, and any combination thereof may be used (FIG. 5C). ). In addition, when it is not necessary to arrange the outside air induction member 13 with respect to all the outside air intake ports 12, the outside air induction member 13 may be provided only for a part of the outside air intake port 12. (FIG. 5D).

Immediately after being sucked from the outside air intake port 12, the flow of the outside air becomes strong, and the effect of inhibiting adhesion of the injection material and dust to the inner wall surface of the blast processing chamber 10 is high, but away from the outside air intake port 12. As a result, the flow of outside air is weakened, so that the effect of inhibiting the adhesion is weakened. In the blast processing chamber 10, airflow (potential flow) toward the bottom of the blast processing chamber 10, that is, the suction means, is generated. (For reference, in the present specification, the term “flood stream” refers to compressed air (spray stream) injected together with the injection material by the blasting nozzle 11 and collides with the workpiece W or the inner wall surface and is reflected.) A part of which is directed upward, and then the air flow directed toward the bottom connected to the suction means 20 is a concept representing an air flow other than the air flow immediately after being introduced in the blast processing chamber. The adhesion can be inhibited by inducing airflow to a portion where the flow of the external air is weakened. An airflow guide member 14 for guiding the internal airflow to a portion where the flow of the outside air is weakened is disposed in the blast processing chamber 10. As the air flow guide member 14, a plate-shaped member (for example, bent at 135 ° to 170 °) bent in a U shape was used (see Fig. 6A). The airflow guide member 14 is disposed at a position away from the airflow guide member 13 with respect to the outside air suction port 12. In addition, the distance between the airflow guide member 14 and the inner wall surface of the blast processing chamber 10 is arranged so that the cross-sectional side farther from the outside air suction port 12 becomes narrower than the cross-sectional side close to the outside air suction port 12. . That is, as shown in FIG. 6, when the outside air induction member 13 and the inside air induction member 14 are disposed, the distance between the side surface where the outside air suction port 12 is disposed and the inside air induction member 14 are disposed. A side far from the outside air suction port 12, that is, the lower side, is disposed as compared with the side close to the outside air suction port 12, that is, the upper side. This distance may be continuously narrowed, or there may be a portion that is continuous and has the same distance in a part thereof (see FIGS. 6A and 6B). The internal airflow guide member 14 may have a plate shape (see FIG. 6C) that is curved in a no-shape in addition to the above shape, and may have a curved and uncurved rectangular plate shape (see FIG. 6D). In either case, it can be applied.

In addition, since part of the reflected airflow flows through the side wall surface 10b and its vicinity, it is introduced by the outside air suction port 12 and also flows downward along the side wall surface 10b by the outside air induction member. The air flow and the flow of the internal air flowing downward along the side wall surface 10b by the internal air induction member are inhibited by the reflected air flow (see FIG. 7). In order to prevent this, the backflow preventing member 15 is disposed on the side wall surface 10b of the blast processing chamber 10. The reverse flow inhibiting member 15 is provided such that its upper end portion is lower than the lower end portion of the internal airflow guide member 14. By the installation of the countercurrent blocking member 15, the cross-sectional area in the horizontal direction is continuously increased as the countercurrent blocking member 15 becomes downward so that the flow of the outside air and the internal air flowing toward the lower side is not impeded. desirable. The longitudinal section is triangular (see Figure 8 (A)), 1/4 circle (see Figure 8 (B)), 1/4 ellipse (see Figure 8 (C)), and part of the ellipse is deformed and the top is acute It can use suitably also in any of 1/4 phosphorus (refer FIG. 8 (D)), etc.

In this embodiment, as shown in FIG. 2, the outside air suction port 12 is arrange | positioned in the upper side part of the blast processing chamber 10, and the outside air flow suctioned from the said outside air suction port 12 is made into the side wall surface 10b. In order to flow along), one end of the rectangular airflow guide member 13 having a rectangular plate shape is disposed perpendicular to the ceiling surface 10a, and the side wall surface 10b below the position where the flow of the external air becomes weak. In order to prevent the adhesion of the spray material and the dust to the airflow guide, the airflow guide member 14, which consists of a plate-shaped member bent in a U-shape, for inducing airflow, is introduced to the outside airflow guide member. Away from the outside air suction port 12 and disposed at a position on the side away from the outside air suction port 12. Further, the reverse flow inhibiting member 15 having a triangular longitudinal section is formed on the side wall surface 10b provided with the outside air suction port 12 so that the bottom side of the vertical cross section is perpendicular to the side wall surface 10b. The upper end of 15 is disposed below the lower end of the air flow guide member 14.

(Example)

Fig. 2A is a plan view, Fig. 2B is a right side view, and Fig. 2C is a plan view. 2D is a sectional view along the line CC in FIG. 2B, FIG. 2E is a sectional view along the DD line in FIG. 2A, and FIG. Shows sectional drawing along the EE line in FIG. 2E and 2F omit the blasting nozzle 11 and the workpiece W for convenience. The blast processing was performed using the blast processing chamber shown in FIG. The suction means 20 was operated and 150 minutes of spraying materials (WA # 600: Shinto Kogyo Co., Ltd.) were sprayed on the workpiece | work W (270 * 280 * t10 steel materials). In addition, a window (not shown) for checking the inside of the blast processing chamber 10 under blasting is disposed on the sidewall surface 10b of the blast processing chamber 10, and the state of the inner wall surface during blast processing was confirmed. . After blasting, no deposits of abrasives and dust on the inner wall surface were found. In addition, even during blasting, deposition of the spray material and the dust on the inner wall surface is not confirmed, and the blast processing can be performed without adhering the spray material and the dust to the inner wall surface of the blast processing chamber 10 according to the present invention. there was.

(Change example)

Although the blasting nozzle in this embodiment was the case of suction type | mold, what was called the direct injection of the injection | pouring material with a compressed air flow to a blasting nozzle and spraying by pressurizing the pressurization tank which loaded the injection material, Even in the case of pressing, the present invention can be suitably used.

In addition, the blasting process is not only an air blast for injecting an injection material together with compressed air, but also a centrifugal blasting device (so-called short blasting device) for projecting the injection material by centrifugal force by the rotation of an impeller. Can be used as appropriate.

In addition, the injection material used for blast processing is specifically limited if it is ceramic type, resin, and vegetable powder other than what is generally used by blast processing (metal type (so-called shot, grid, cut wire)). The present invention can be applied to the present invention.

In the embodiment, three rectangular outside air suction ports were arranged in parallel with the side wall surface of the blast processing chamber, but the shape and the number of water can be appropriately changed without being limited.

In the Example, although the opening surface of the airflow rectifying member which is not connected to the outer wall of a blast processing chamber was provided so that it might become an upward direction (ceiling surface direction), you may provide in a horizontal direction.

Even if the internal airflow guide member bent in a U-shape is continuously curved, a portion may be straight, or the bending rate (angle) may change depending on the site.

The air flow guide member may be a plate member curved in a no-shape. In this case, even if it curves continuously, even if one part is a straight line and the curvature changes with a site | part, it can use preferably in any case.

As shown in the embodiment and the example, the backflow inhibiting member is a blast processing chamber provided with the outside air suction port, even when the outside airflow rectifying member, the outside airflow guide member, and the inside airflow guide member are not provided. It is available.

In the embodiment, the outside air suction port, the outside air flow rectifying member, the outside air flow inducing member, the inside air flow inducing member, and the backflow inhibiting member are provided so that the outside air and the inside air flow to the side wall surface of the blast processing chamber. The outside air and the inside air may be arranged to flow to the ceiling surface of the blast processing chamber.

1: blast processing device
10: blast processing chamber
10a: ceiling
10b: side wall surface
11: nozzle for blast processing
12: outside air suction port
12f: airflow rectifying member
13: outside air induction member
14: air flow guide member
15: no reflux inhibition
20: suction means (dust collector)
21: separation means (cyclone classifier)
22: abrasive hopper
D: Duct
H: Hose
W: Workpiece

Claims (19)

It is provided with the blast processing chamber for performing a blast processing by spraying an injection material toward a to-be-processed object from the blast processing nozzle installed inside, and the suction means for sucking in the said blast processing chamber,
The blast processing chamber sucks outside air into the blast processing chamber, and at least one outside air suction port is provided so that the sucked outside air flows along the inner wall surface of the blast processing apparatus. Device. The method of claim 1,
A blast processing, characterized in that an outside air flow rectifying member is disposed on the outer wall surface side of the blast processing chamber provided with the outside air suction port for rectifying outside air and sucking it into the blast processing chamber. Device. 3. The method of claim 2,
The outside air flow rectifying member is a hollow member having both ends open, and one of the opening faces is attached to an outer wall surface of the blast processing chamber, and is connected to the outside air suction port. The method of claim 3, wherein
The external air rectifying member has a rectangular cross section in a direction orthogonal to the opening surface. The method of claim 3, wherein
The airflow rectifying member is any one of a shape in which a cross section in a direction orthogonal to the opening surface is bent in a U-shape or an L-shape, or a shape curved in a No-shape. Blast processing device. The method of claim 1,
The blast processing apparatus is arrange | positioned in the said blast processing chamber, The outside air flow guide member which guides the outside air attracted by the said outside air suction port to flow along an inner wall surface is arrange | positioned. The method according to claim 6,
The external air induction member whose one end surface is fixedly attached to at least one of the ceiling surface and the side wall surface in the blast processing chamber has a plate shape, and the ceiling surface and the side of the blast processing chamber to which the external air induction member is fixedly attached. A blast processing apparatus, characterized in that the longitudinal section orthogonal to the wall surface is rectangular. The method according to claim 6,
The external air induction member whose one end surface is fixed to at least one of the ceiling surface and the side wall surface of the blast processing chamber has a plate shape, and the ceiling surface and the side of the blast processing chamber to which the external air induction member is fixedly attached. The longitudinal cross section orthogonal to a wall surface is either a shape bent in a U shape or a shape bent in a No shape. 9. The method according to claim 7 or 8,
An angle formed between the outside air induction member and the inner wall surface of the side on which the outside air flow of the inner wall surface to which the outside air induction member is fixed is introduced is 90 ° or less. The method of claim 9,
The outside air flow guide member is arranged to guide the outside air sucked by the outside air suction port along the inner wall surface of the outside air suction port. The method according to claim 6,
The blast processing apparatus is arrange | positioned in the said blast processing chamber, The airflow guide member which guides the airflow which generate | occur | produced inside the blast processing chamber along an inner wall surface is arrange | positioned. The method of claim 11,
The said airflow guide member is a plate shape of which the flat surface is rectangular, The blast processing apparatus characterized by the both end surfaces parallel to the said airflow guide member being fixedly attached to the side surface of the said blast processing chamber, respectively. 13. The method of claim 12,
Any one of a shape in which a longitudinal cross section of the airflow induction member orthogonal to the inner wall surface of the blast processing chamber fixedly attached to the airflow induction member is curved in a U-shape or in a no-shape shape. The blast processing apparatus characterized by the above-mentioned. The method of claim 11,
The said airflow induction member is arrange | positioned at the position of the side away from the said outside air suction inlet from the said outside airflow induction member, The blast processing apparatus characterized by the above-mentioned. The method of claim 11,
The blast processing apparatus is characterized in that the airflow guide member is narrower on the cross-sectional side farther from the outside air suction port than the cross-sectional side close to the outside air suction port of the blast processing chamber. The method according to claim 6,
In the case where the outside air induction member is attached to the ceiling surface, the side wall surface of the blast processing chamber is opposite to the end that is fixedly attached to the ceiling inner wall surface of the blast processing chamber of the outside air induction member. A blast processing apparatus, wherein the backflow inhibiting member is fixed to a position farther from the outside air suction port than the stage. The method of claim 11,
In the case where the outside air induction member is attached to the ceiling surface, the outside air induction member is farther from the outside air suction port than the end opposite to the end fixedly attached to the ceiling inner wall surface of the blast processing chamber. A blast processing apparatus, wherein a backflow inhibiting member is fixedly attached to a side wall surface of the blast processing chamber further away from the outside air suction port of the airflow inducing member than a distant cross section. 18. The method according to claim 16 or 17,
The blast processing apparatus characterized by the cross-sectional area orthogonal to the direction away from the said outside air suction port of the said backflow inhibiting member becoming large toward the direction away from the said outside air suction port of the said blast processing chamber. The method of claim 18,
The blast processing apparatus characterized by the fact that the longitudinal cross section of the said backflow inhibiting member orthogonal to the ceiling surface and the wall surface of the said blast processing chamber fixedly attached to the said airflow induction member is a triangle.

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