Nozzle member and wet blasting apparatus equipped with the nozzle member

Abstract

Even when wet blasting is performed by placing multiple workpieces on a tray, productivity is further improved and various conventional problems such as uniformity of processing, suppression of workpiece flying, and simplification of transportation are solved. [Solution] A nozzle member that sprays slurry, which is a mixture of liquid and abrasive grains, onto a workpiece. The nozzle member has a pair of nozzle bodies each having a slit-shaped nozzle port extending in a straight line, and the pair of nozzle bodies are arranged opposite each other in a cross section perpendicular to the extension direction of the nozzle port so that the slurry sprayed from the nozzle ports collide with each other at any point.

Description

[Technical field]

[0001] The present invention relates to a nozzle member for spraying a slurry, which is a mixture of abrasive grains and a liquid such as water, onto a workpiece or the like to treat the surface of the workpiece, and a wet blasting treatment apparatus equipped with this nozzle member. [Background technology]

[0002] Conventionally, wet blasting has been performed in which a slurry, which is a mixture of abrasive grains and liquid such as water, is sprayed onto a workpiece by compressed air in order to improve the durability of the cutting tip used in a cutting tool and to remove dirt and burrs from the surface of the workpiece. In this type of wet blasting, a wet blasting treatment device equipped with a nozzle member for spraying the slurry is used, and various types of such nozzle members and wet blasting treatment devices are known.

[0003] For example, as described in Patent Document 1, a nozzle member used in a conventional wet blasting processing apparatus is a nozzle member provided in a wet blasting processing apparatus for spraying a slurry, which is a mixture of liquid and abrasive grains, together with compressed air onto a workpiece, i.e., a member to be treated, and a plurality of nozzle bodies are provided in a main body portion provided at an upward position relative to the member to be treated, and these nozzle bodies are provided so that the slurry is sprayed together with compressed air at an incline downward from the opposing side onto a specified portion of the member to be treated.

[0004] Such a nozzle member has a high processing capacity, and therefore has the effect of reducing the processing costs of the wet blasting process. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-202587 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the conventional nozzle members have a good uniformity of treatment when performing wet blasting on one workpiece, and are very advantageous in preventing the workpiece from shifting due to the spraying of slurry from the opposite side to the workpiece (hereinafter, also referred to as "workpiece flying"), but have a problem of low productivity because they need to perform the treatment on one workpiece.In addition, in order to increase productivity, it is possible to perform wet blasting on multiple workpieces placed on a tray, but this type of treatment method is less reliable and causes problems such as a deterioration in uniformity of treatment, the occurrence of workpiece flying, and complicated transportation.

[0007] More specifically, the nozzle member described in Patent Document 1 has eight nozzle bodies that spray slurry in spots arranged on a predetermined circumference, and each nozzle body sprays slurry at an incline downward from the opposite side to the treated area. In wet blasting treatment using such a nozzle member, the nozzle member is moved back and forth along the horizontal direction of the workpiece to treat the entire surface of the workpiece.

[0008] However, if the slurries sprayed from each of the eight nozzle bodies interfere with each other, the abrasive grains contained in the slurry will collide and wear out, or the buffer will reduce processing efficiency. To prevent this, the spray pattern needs to be arranged in a doughnut shape on the workpiece placement surface so that the slurries sprayed from the eight nozzle bodies do not interfere with each other.

[0009] When the slurry is sprayed in a doughnut shape in this way, when multiple workpieces placed on the tray are processed, the spray of the slurry spreads over the multiple workpieces, causing uneven spraying of the workpieces and resulting in a structure that is prone to misalignment, such as workpieces flying or rotating. In addition, the occurrence of misalignment can cause uneven spraying of the slurry onto the workpieces, which can adversely affect the uniformity and productivity of processing. In order to prevent such misalignment, a method such as making the tray a dedicated shape for each workpiece can be considered, but there is a problem in that such a tray is not versatile enough to be used with a wide variety of workpieces.

[0010] The present invention has been made to solve the above-mentioned problems, and aims to provide a nozzle member and a wet blasting processing apparatus equipped with this nozzle member that can further improve productivity and solve various problems that have previously been encountered, such as uniformity of processing, suppression of workpiece flying, and simplification of transportation, even when wet blasting processing is performed by placing multiple workpieces on a tray. [Means for solving the problem]

[0011] The nozzle member according to the present invention for solving the above problems is a nozzle member for injecting a slurry, which is a mixture of liquid and abrasive grains, onto a processed member, the nozzle member having a pair of nozzle bodies each having a linearly extending slit-shaped injection port, the pair of nozzle bodies each having a nozzle hole of the injection port. The slit extends linearly. The slurry injected from the injection port in a cross section perpendicular to the direction The extension of the injection direction is Each other The slits of the respective ejection ports are arranged in parallel to each other so as to intersect with each other and to eject the slurry simultaneously onto the workpiece. They are characterized by being arranged opposite each other.

[0012] In the nozzle member according to the present invention, the pair of nozzle bodies have an injection angle of the slurry injected from the injection port in a cross section perpendicular to an extension direction of the injection port. Vertical It is preferable that the inclination angle is 1 to 50° with respect to each other.

[0013] In the nozzle member according to the present invention, it is preferable that the difference in the spray angles of the pair of nozzle bodies is within 5°.

[0014] In the nozzle member according to the present invention, it is preferable that the pair of nozzle bodies include angle adjustment means capable of changing the spray angle.

[0015] In addition, in the nozzle member according to the present invention, it is preferable that the length along the opposing direction of the pair of nozzle bodies of the position where the slurry sprayed from each of the pair of nozzle bodies is sprayed onto the treated member is changeable.

[0016] In the nozzle member according to the present invention, the nozzle member has a nozzle hole of the injection port. The slit extends linearly. Orthogonal to the direction Move to It is preferable to provide a movable means for moving the vehicle.

[0017] Further, the wet blasting apparatus according to the present invention is a wet blasting apparatus including the nozzle member described above, wherein the nozzle member is set The nozzle members are arranged such that the directions in which the injection ports extend intersect with each other. Effect of the Invention

[0018] According to the nozzle member of the present invention and a wet blasting processing apparatus equipped with this nozzle member, a pair of nozzle bodies are arranged facing each other in a cross section perpendicular to the extension direction of the nozzle so that the slurry sprayed from the nozzles collides with each other at any point. Therefore, the slurry is sprayed only onto a specified treated member (hereinafter also referred to as the "work") from opposite directions, which makes it less likely that the work will fly off or rotate, resulting in improved productivity and uniform processing. [Brief description of the drawings]

[0019] [Figure 1] 1 is a schematic diagram of a wet blasting treatment apparatus including a nozzle member according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a plan view of a nozzle member according to the embodiment of the present invention. [Diagram 3] FIG. 2 is a perspective view showing a nozzle body of the nozzle member according to the embodiment of the present invention. [Figure 4] 6A to 6C are diagrams illustrating the operation of a nozzle member according to an embodiment of the present invention. [Diagram 5] 4A and 4B are diagrams showing an angle adjustment means for a nozzle member according to an embodiment of the present invention. [Figure 6] 5A to 5C are diagrams illustrating a method for adjusting the distance of a nozzle member to a workpiece according to an embodiment of the present invention. [Figure 7] FIG. 2 is a diagram illustrating a transport unit of a wet blasting treatment apparatus including a nozzle member according to an embodiment of the present invention. [Figure 8] 5A to 5C are diagrams illustrating a wet blasting process using a nozzle member according to an embodiment of the present invention. [Figure 9] 5A to 5C are diagrams illustrating a wet blasting process using a nozzle member according to an embodiment of the present invention. [Figure 10] 5A to 5C are diagrams illustrating a wet blasting process using a nozzle member according to an embodiment of the present invention. [Figure 11] 5A and 5B are diagrams illustrating a maximum opposing spray width of slurry from a nozzle member according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Preferred embodiments for carrying out the present invention will be described below with reference to the drawings. Note that the following embodiments do not limit the inventions according to the claims, and all of the combinations of features described in the embodiments are not necessarily essential to the solution of the invention.

[0021] FIG. 1 is a schematic diagram of a wet blasting processing apparatus equipped with a nozzle member according to an embodiment of the present invention, FIG. 2 is a plan view of the nozzle member according to an embodiment of the present invention, FIG. 3 is an oblique view showing the nozzle body of the nozzle member according to an embodiment of the present invention, FIG. 4 is a diagram showing the operation of the nozzle member according to an embodiment of the present invention, FIG. 5 is a diagram showing the angle adjustment means of the nozzle member according to an embodiment of the present invention, FIG. 6 is a diagram explaining a method of adjusting the distance to the workpiece of the nozzle member according to an embodiment of the present invention, FIG. 7 is a diagram explaining the transport means of a wet blasting processing apparatus equipped with a nozzle member according to an embodiment of the present invention, FIGS. 8 to 10 are diagrams explaining wet blasting processing using the nozzle member according to an embodiment of the present invention, and FIG. 11 is a diagram explaining the maximum opposing spray width of slurry by the nozzle member according to an embodiment of the present invention.

[0022] 1, a nozzle member 10 according to this embodiment is suitably attached to a wet blasting treatment device 1, and the nozzle member 10 sprays abrasives S against the surface of a workpiece W transported by a transport means, colliding the abrasives S and performing surface treatment. The sprayed abrasives S are collected in a slurry collection section 9 arranged below the transport means 2, and reused after removal of foreign matter, etc.

[0023] In this embodiment, the workpiece W to be subjected to the wet blasting process is described as a roughly rectangular cutting tip (see FIG. 11) used in a cutting tool, but the shape of the workpiece W to be processed by the nozzle member 10 of this embodiment is not limited to this and can be applied to various conventionally known processed members.

[0024] The abrasive material S is preferably a slurry, which is a mixture of liquid and abrasive grains, sprayed together with compressed air. The liquid contained in the slurry serves to carry the abrasive grains, which will be described later, to the surface of the workpiece. Therefore, any liquid can be used as long as it can fulfill this role, except for flammable substances. Specifically, it is preferable to use water, from the viewpoints of environmental considerations and cost.

[0025] The abrasive grains are carried to the surface of the workpiece by the liquid and serve to perform the desired processing on the surface of the workpiece. Therefore, any abrasive grains can be used as long as they can perform this function.

[0026] Specifically, the material of the abrasive grains may be ceramics, resin, metal, etc., and more specifically, may be alumina, glass, zirconia, stainless steel, etc. The shape of the abrasive grains may be polygonal, spherical, spherical, etc. The size of the abrasive grains may be appropriately selected from about 1 μm to about 500 μm.

[0027] The content ratio of the abrasive grains in the entire slurry is not particularly limited, and can be appropriately designed depending on the material and processing area of ​​the workpiece, and further the desired degree of processing, etc.

[0028] In addition to the liquid and abrasive grains, the slurry may contain a mixture having various functions, for example, a rust inhibitor. By containing a rust inhibitor in the slurry used in the wet blasting method, it is possible to impart a rust prevention effect to the surface of the workpiece while subjecting it to a conventional wet blasting treatment. Also, instead of the rust inhibitor, various additives may be added to the extent that they do not impair the action and effect of each component.

[0029] The wet blasting processing apparatus 1 equipped with the nozzle member 10 of this embodiment includes a conveying means 2 extending in the processing direction, a loader 2a located at the base end side of the conveying means 2, and a first processing section 3a, a second processing section 3b, and an unloader 6 each arranged along the extension direction of the conveying means 2 from the loader 2a.

[0030] As shown in Figure 7, the conveying means 2 is continuously extended in the longitudinal direction, and a pair of profiled belts 7, 7 arranged at a predetermined interval in the width direction are looped around a drive unit 8 arranged at the end of the conveying means 2 on the longitudinal side of the unloader 6.

[0031] In addition, the workpieces W are preferably arranged vertically and horizontally at a predetermined interval along the length and width directions on the mounting member T, and the mounting member T is transported so as to be stretched between the profiled belts 7. For this reason, when the abrasives S are sprayed from above the workpieces W by the first processing section 3a and the second processing section 3b described later, in a conventional method in which a conveying belt is provided under the mounting member T, the abrasives S after the wet blasting process is likely to hit the conveying belt and be reflected, causing the workpieces W to fly out of the mounting member T or rotate. However, according to the structure of the conveying means 2 according to this embodiment, there is no belt or the like below the mounting member T that reflects the abrasives S, so problems such as the workpieces W flying out or rotating due to the belt or the like do not occur.

[0032] Furthermore, since the mounted material T is transported by the profiled belt 7, in a system in which a conveying belt is provided under the mounted material T, slippage is likely to occur when the belt is divided and the mounted material T transfers to the next belt at the divided part. However, according to the structure of the conveying means 2 in this embodiment, it is possible to prevent the mounted material T from slipping on the conveying means 2, and a simple structure of the conveying means 2 can be realized without causing a decrease in the uniformity of the wet blasting treatment.

[0033] The drive unit 8 is composed of a pulley arranged on the unloader 6 side of the profiled belt 7, and it is preferable that a belt tension mechanism is arranged on the loader 2a side, and at least the pulley on the unloader 6 side is given a driving force by a motor or the like (not shown). As a structure for giving a driving force, the rotating shaft of the motor may be assembled coaxially with the pulley, or the motor and pulley may be driven via a drive belt or the like.

[0034] The loader 2a and unloader 6 are respectively arranged at the base end and the tip end of the conveying means 2 in the conveying direction, and are used to load a mounting member T carrying a workpiece W before processing, and to remove a mounting member T carrying a workpiece W after processing.

[0035] The first processing section 3a and the second processing section 3b are arranged so that the nozzle member 10 according to this embodiment can move in a predetermined direction. The first processing section 3a is arranged so that the slit-shaped injection port 22 of the nozzle member 10 described later is aligned along the conveying direction of the conveying means 2, and moves back and forth along the width direction of the conveying means 2 (the opposing direction of the pair of profiled belts 7). In contrast, the second processing section 3b is arranged so that the slit-shaped injection port 22 of the nozzle member 10 is aligned along the width direction of the conveying means 2, and moves back and forth along the conveying direction of the conveying means 2.

[0036] Furthermore, since the same nozzle member 10 is used in both the first processing section 3a and the second processing section 3b, in the following explanation, the first processing section 3a will be described, and a detailed explanation of the second processing section 3b will be omitted.

[0037] As shown in FIG. 2, the nozzle member 10 is arranged such that the extension directions of the openings of the slit-shaped injection port 22 are parallel to each other, and is sandwiched between a pair of angle adjustment means 11 arranged on both ends of the slit-shaped injection port 22. In addition, a moving means 12 to which the angle adjustment means 11 is attached is provided above the nozzle member 10. The moving means 12 holds the nozzle member 10 so that it can move back and forth in a direction perpendicular to the extension direction of the slit-shaped injection port 22 (the width direction in the case of the first processing section 3a, and the conveying direction in the case of the second processing section 3b). The moving means 12 may have any configuration as long as it can move the nozzle member 10 along the width direction or the conveying direction, but for example, a conventionally known moving mechanism using various conventionally known actuators such as a linear guide device or a ball screw or a timing belt can be used. It is preferable that the moving means 12 is provided with a vertical moving mechanism 15 that can move not only back and forth but also vertically.

[0038] 3, the nozzle body 20 sprays the abrasives S in a band shape from a slit-shaped spray port 22 extending linearly. The nozzle body 20 includes a nozzle body main body 21 in which a slurry inlet 23 for introducing slurry and an air inlet 24 for introducing compressed air are formed, and the slit-shaped spray port 22 suspended from the nozzle body main body 21. The slurry and compressed air introduced from the slurry inlet 23 and air inlet 24 are stored in a slurry storage chamber and an air storage chamber inside the nozzle body main body 21, mixed in an internal passage connecting to the slurry storage chamber and the air storage chamber, and sprayed as the abrasives S from the slit-shaped spray port 22.

[0039] The angle adjustment means 11 is a plate-like member arranged on the side surface of the pair of nozzle bodies 20, and has an arc-shaped guide groove 13. The guide groove 13 has notches 13a and 13b formed at a predetermined interval so that the spray angle of the nozzle body 20, which will be described later, can be adjusted to a predetermined angle. In the nozzle member 10 according to this embodiment, a total of six notches 13a and 13b are formed on one side so that the positions of the notches 13a and 13b can be adjusted to 1°, 10°, 20°, 40°, 45°, and 50°.

[0040] As shown in Figure 4, a pair of nozzle bodies 20 are attached to the angle adjustment means 11, and are arranged opposite each other so that the slurries sprayed from the slit-shaped nozzles 22 collide with each other at any point in a cross section perpendicular to the extension direction of the slit-shaped nozzles 22.

[0041] 5, the nozzle body 20 is fixed to the angle adjustment means 11 by loosening the fixing pin 14a, inserting the fixing pin 14a into any of the notches 13a of the guide groove 13, and inserting the fixing pin 14b into any of the notches 13b, and then tightening the fixing pin 14a to fix the nozzle body 20. At this time, the pair of nozzle bodies 20 are fixed to the notches 13a and 13b formed at positions symmetrical to the vertical direction, respectively.

[0042] In this way, by fixing the nozzle body 20 at two locations in the fixing holes 25a, 25b using the fixing pins 14a, 14b, it becomes possible to fix the nozzle body 20 at a desired angle without any deviation.

[0043] The fixing holes 25a, 25b formed in the nozzle body 20 are formed at two locations, the tip side (slit-shaped injection port 22 side) and the base side (slurry inlet port 23 side) of the nozzle body 20, as shown in Figs. 5 and 6. The fixing pins 14a, 14b are inserted into either the tip side or the base side of the fixing holes 25a, 25b, so that the distance from the slit-shaped injection port 22 to the workpiece W can be adjusted. The positions at which the fixing holes 25a, 25b are formed are not limited to the tip side or the base side, and they may be formed in three or more locations. In the nozzle member 10 according to this embodiment, the case where the fixing pin 14b corresponding to the tip side fixing hole 25b is inserted at a position corresponding to a nozzle angle of 20° has been described. However, for the purpose of explanation, the insertion holes of the fixing pins 14b formed in the angle adjustment means 11 at positions corresponding to angles other than 20° are omitted from the illustration.

[0044] In this way, the nozzle member 10 of this embodiment makes it possible to adjust the spray distance from the slit-shaped spray nozzle 22 to the workpiece W, making it possible to adjust the force with which the slurry collides with the workpiece W during wet blasting processing.

[0045] Furthermore, the nozzle body 20 may be fixed to the angle adjustment means 11 at any position on the arc without forming the notches 13a, 13b in the guide groove 13. In this case, it is preferable that the angle difference between the spray angles of the pair of nozzle bodies 20 is set to 5° or less. If the angle difference between the spray angles exceeds 5°, it becomes difficult to sufficiently suppress the flying and rotation of the workpiece, which will be described later.

[0046] As described above, the adjustment range of the spray angle of the nozzle body 20 is preferably set to 1° to 50°. If the spray angle exceeds 50°, the sprayed slurry S interferes with the wall portion formed on the mounting member T for holding the workpiece W, reducing the processing efficiency. If the spray angle exceeds 50°, the force that lifts the workpiece W becomes greater than the force that holds down the workpiece W, which will be described later, making it difficult to hold down the workpiece W reliably.

[0047] Furthermore, in the nozzle member 10 according to this embodiment, the length along the opposing direction of the pair of nozzle bodies 20 at the position where the slurry jetted from each of the pair of nozzle bodies 20 is jetted onto the workpiece W (hereinafter referred to as the "opposing jet width" in this specification) is variable. Specifically, the opposing jet width can be adjusted by assembling the nozzle body 20 into any of the notches 13a, 13b formed in the guide groove 13 of the angle adjustment means 11.

[0048] As shown in Fig. 11, it is preferable that the adjustment range of the opposed injection width L is adjustable from 5 mm to the diameter of the maximum inscribed circle C of the workpiece W. Since the opposed injection width L can be adjusted within such a range, it is possible to sufficiently suppress the flying and rotation of the workpiece W, which will be described later. If the adjustment range of this opposed injection width L is 5 mm or less, the processing efficiency decreases due to the buffer, and the abrasive is easily worn away due to collisions between the sprayed slurries S, and if the opposed injection width L is set to exceed the maximum inscribed circle C, the force suppressing the flying and rotation of the workpiece W does not work effectively.

[0049] The opposed injection width L can be freely adjusted by moving the nozzle member 10 itself up and down using the above-mentioned vertical movement mechanism 15. Specifically, by making the vertical movement mechanism 15 vertically movable by numerical control, it becomes possible to freely set the opposed injection width L according to the shape of the workpiece W.

[0050] Next, the operation of the nozzle member 10 according to this embodiment will be described with reference to FIGS.

[0051] 7, in the first processing section 3a, a wet blasting process is performed by injecting a slurry onto a plurality of workpieces W placed on a mounting member T. In the first processing section 3a, the nozzle member 10 has a slit-shaped injection port 22 arranged parallel to the conveying direction of the conveying means 2, and performs the wet blasting process while moving in the width direction.

[0052] At this time, in the nozzle member 10 of this embodiment, as shown in Figure 8, the nozzle body 20 (picking up processing side) located upstream in the movement direction of the workpiece W sprays slurry onto the upper surface of the workpiece W, and the nozzle body 20 (feeding processing side) located downstream of the workpiece W wet blasts the cutting surface of the workpiece W.

[0053] The jetting of the slurry from the nozzle body 20 on the sending side generates a force that blows the workpiece W towards the receiving side, and at the same time, the jetted slurry penetrates into the underside of the workpiece W and generates a force that lifts the workpiece W. The nozzle body 20 on the sending side blows away and rotates the workpiece W due to this blowing force and lifting force, but the nozzle body 20 on the receiving side jets the slurry onto the top surface of the workpiece W, suppressing the force that causes the workpiece W to fly or rotate.

[0054] Furthermore, when the nozzle member 10 in this embodiment is moved further, as shown in Figure 9, the nozzle body 20 on the incoming processing side wet blasts the cutting surface of the workpiece W, and the nozzle body 20 on the sending processing side holds down the upper surface of the workpiece W, making it possible to wet blast the cutting surface while suppressing the flying and rotation of the workpiece W.

[0055] Furthermore, as shown in FIG. 10, according to the nozzle member 10 of this embodiment, wet blasting can be performed on multiple workpieces W placed on a mounting member T, and the slurry S can be sprayed only onto the workpieces W arranged in the spraying direction. This prevents biased and uneven wet blasting from being performed on any of the workpieces W, and allows for spraying with good controllability, thereby enabling uniform wet blasting to be performed on multiple workpieces W.

[0056] In addition, since the nozzle member 10 of this embodiment is capable of adjusting the spray angle of the slurry S using the angle adjustment means 11, it is possible to perform wet blasting not only on the top surface of the workpiece W but also on the cutting surface of the side of the workpiece W regardless of the shape of the workpiece W.

[0057] Furthermore, since the nozzle member 10 in this embodiment is capable of reciprocating movement along the movement direction, even if the processes described in Figures 8 and 9 are repeated multiple times, the workpiece W does not fly or rotate, and wet blasting of the cutting surface can be performed to the desired state, thereby improving processing performance.

[0058] Furthermore, in the second processing section 3b, the slit-shaped injection nozzle 22 is arranged parallel to the width direction of the conveying means 2, and wet blasting treatment is performed while moving in the conveying direction. This makes it possible to perform wet blasting treatment on the cutting surface that could not be treated in the first processing section 3a (the cutting surface in the vertical direction in Figure 10), and therefore makes it possible to perform wet blasting treatment on the cutting surface around the entire circumference of the workpiece W.

[0059] In addition, the nozzle member 10 according to this embodiment can be configured to be movable in the vertical direction with respect to the thickness direction of the workpiece W, thereby making it possible to accommodate changes in the thickness of the workpiece W. In this case, the above-mentioned up-down movement mechanism 15 can be used as a mechanism for moving the nozzle member 10 according to this embodiment in the vertical direction.

[0060] In addition, the nozzle member 10 according to the present embodiment has been described as being arranged in a mutually orthogonal orientation in the first processing section 3a and the second processing section 3b, but the number of nozzle members 10 is not limited to two, and one or three or more may be arranged. In addition, the nozzle member 10 according to the present embodiment has been described as performing a wet blasting treatment on a workpiece W transported by the transport means 2, but the nozzle member 10 itself may be moved relative to the workpiece W placed on a table or the like to perform the wet blasting treatment. It is clear from the claims that such modified or improved forms are also included in the technical scope of the present invention. [Explanation of symbols]

[0061] 1 wet blasting processing apparatus, 2 conveying means, 2a loader, 3a first processing section, 3b second processing section, 6 unloader, 7 profiled belt, 8 drive section, 9 slurry recovery section, 10 nozzle member, 11 angle adjustment means, 12 moving means, 13 guide groove, 13a, 13b notches, 14a, 14b fixing pins, 20 nozzle body, 21 nozzle body main body, 22 slit-shaped injection port, 23 slurry inlet port, 24 air inlet port, 25a, 25b fixing holes, C maximum inscribed circle, L opposing injection width, S slurry, T mounting member.

Claims

1. A nozzle member that sprays a slurry, which is a mixture of liquid and abrasive grains, onto a member to be treated, The nozzle member has a pair of nozzle bodies each having a slit-shaped injection port extending linearly, The pair of nozzle bodies are arranged opposite each other so that, in a cross section perpendicular to the direction in which the slits of the nozzles extend linearly, extension lines of the injection directions of the slurry injected from the nozzles intersect with each other, and the extension directions of the slits of each of the nozzles are parallel to each other so that the slurry is injected simultaneously onto the workpiece.

2. The nozzle member according to claim 1 , The pair of nozzle bodies are characterized in that, in a cross section perpendicular to the extension direction of the nozzles, the spray angles of the slurry sprayed from the nozzles are inclined at 1 to 50 degrees relative to the vertical direction.

3. The nozzle member according to claim 2, A nozzle member, characterized in that the difference in the jetting angles of the pair of nozzle bodies is within 5°.

4. The nozzle member according to claim 2, The pair of nozzle bodies are provided with angle adjustment means capable of changing the spray angle.

5. The nozzle member according to claim 1 , A nozzle member, characterized in that a length along a direction in which the pair of nozzle bodies face each other of a position where the slurry is sprayed from each of the pair of nozzle bodies onto the processed member is variable.

6. The nozzle member according to claim 1 , The nozzle member is characterized in that it is provided with a moving means capable of moving in a direction perpendicular to a direction in which the slit of the injection port extends linearly.

7. A wet blasting apparatus comprising the nozzle member according to claim 1, The wet blasting apparatus includes two or more sets of the nozzle members, and the nozzle members are arranged such that the extension directions of the jet nozzles intersect with each other.

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