JP2019005725A - Slurry spray body and wet blast treatment method - Google Patents

Abstract

To provide a very practical slurry spray body and a wet blast treatment method.SOLUTION: A slurry spray body, which has a slurry passage part 3 introducing slurry 50 with abrasive grains 50b mixed in a liquid 50a and a compressed air passage part 2 introducing compressed air to mix the slurry 50 introduced from the slurry passage part 3 with the compressed air introduced from the compressed air passage part 2 in a mixing chamber 4 communicating with the compressed air passage part 2, to spray the slurry 50 mixed with this compressed air sprayed out of a spray hole 6 provided in continuity with the mixing chamber 4 to a treatment object 60, the spray hole 6 being provided side by side in a direction, and the compressed air passage part 2 and the mixing chamber 4 being provided independently by corresponding to the spray holes 6.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a slurry ejector and a wet blasting method.

  For example, the display surface of a portable information terminal such as a smartphone or a tablet or an in-vehicle information terminal in a car navigation system needs to have a light diffusion performance that prevents regular reflection of incident light while maintaining light transmission performance for high-definition display. is there.

  Therefore, specular reflection-preventing coatings and films on the display surface have been proposed. However, these coatings and films have the disadvantages of reduced transmittance and insufficient strength due to deterioration of the materials. The development of anti-glare glass having the above-mentioned performance in the tempered glass itself has been underway.

  This anti-glare glass has fine dimples (spherical dents) formed on the surface of tempered glass. The finer the dimples are, the better the light diffusing performance is maintained while maintaining the light transmission performance. It will be.

  By the way, this dimple is formed by roughening the surface of the tempered glass and then immersing it in an etching solution containing hydrofluoric acid as a main component so that the dimples start from the fine irregularities formed on the surface of the tempered glass. However, in order to form fine and well-equipped dimples on the surface of the tempered glass, it is necessary to form fine irregularities having a uniform size on the surface of the tempered glass as a pretreatment for etching.

  Therefore, conventionally, as a pre-etching treatment on the surface of the tempered glass during the production of the antiglare glass, for example, a wet blasting treatment as disclosed in JP-A-2006-40211 has been performed. A slurry in which grains are mixed is sprayed onto the surface of the object to be processed, and a fine surface treatment for tempered glass is possible. At present, this is an indispensable technique for producing high-quality anti-glare glass.

  By the way, in the production process of anti-glare glass products (displays), production efficiency is taken into consideration, and after forming the dimples in the state of large format glass, it is generally cut into a necessary size. At present, the size is increased to more than 100 cm in order to improve production efficiency.

  In this regard, the present applicant has proposed a slurry spray body disclosed in Japanese Patent No. 3540713 (hereinafter, a conventional example) as a slurry spray body for wet blasting a wide range of processing surfaces. If so, the large glass can be efficiently wet-blasted.

  That is, the conventional example is provided with a slurry storage part for storing slurry 50 in which abrasive 50b is mixed with liquid 50a, and a compressed air passage part is provided in the vicinity of the slurry storage part. The reservoir is communicated by a slurry passage portion, and has a predetermined length of air space where compressed air is introduced from the compressed air passage portion and slurry 50 is introduced from the slurry reservoir portion via the slurry passage portion and communicates with the compressed air passage portion. The slurry 50 and the compressed air are mixed in the mixing chamber, and the slurry 50 mixed with the compressed air is jetted from the injection holes 36 connected to the mixing chamber to the workpiece 60 and is provided below the mixing chamber. The injection hole 36 is provided in a slit shape having the same length as that of the mixing chamber (see FIG. 8).

  Therefore, in the conventional example, even if the object to be processed 60 is a large glass, the object 60 is efficiently wetted by spraying the slurry 50 while moving the position opposed to the object to be processed 60 by a certain distance. Can be blasted.

Japanese Patent Laid-Open No. 2006-40211 Japanese Patent No. 3540713

  However, the length L of the injection hole 36 of the conventional example is about 60 cm, and in order to wet-blast large sized glass exceeding 100 cm, the conventional example is reciprocated. It was confirmed that grain collision traces were generated unevenly.

  That is, as shown in FIG. 8, since the injection speed drops rapidly at both ends in the length direction of the slit-like injection hole 36 (the central part 36a of the injection hole 36 has two surfaces on the front and rear surfaces that are in contact with the slurry 50). On the other hand, the longitudinal end portions 36b of the injection hole 36 have three surfaces, the front and rear and the side surfaces, and the resistance is reduced accordingly, and the speed is reduced. Non-uniform processing capacity occurs, which results in non-uniform abrasive grain collision marks. Despite the fact that this abrasive grain collision mark is a level that cannot be visually discerned, it becomes noticeable by performing an etching process in the subsequent process, and when it is made a product, it will partially reflect light different from other parts, quality There is a high possibility of failure. In FIG. 9A, the curve obtained by tracing the tip of the arrow representing the injection speed vector of the slurry 50 is the injection energy distribution curve of the slurry 50, and FIG. 9B is the slurry injector. FIG. 9C is a conceptual diagram in which the ejection energy distribution curves for each scan in the case where the scanning and the pitch feed are repeatedly performed are shown, and (c) in FIG. 9 is an overlay of the ejection energy distribution curves for each scan of the slurry injector. It is a conceptual diagram.

  As a measure for preventing the occurrence of uneven abrasive collision marks, it is conceivable that the length L of the injection hole 36 is equal to or greater than the width of the workpiece 60, but the slit-like injection hole 36 can be lengthened. The closer the concentration of abrasive grains 50b in the slurry 50 becomes, the more difficult it is to maintain the uniformity of processing, and there is a cost problem and a large installation space as the wet blasting apparatus becomes larger. Is not realistic. At the present practical level, the limit of the length L of the slit-like injection hole 36 is about 60 cm.

  As described above, it is a major problem in wet blasting when producing high-quality anti-glare glass to suppress the occurrence of non-uniformity of abrasive grain collision traces on the tempered glass surface.

  The present invention solves the above-described problems, and provides a slurry jetting body and a wet blasting method that are extremely excellent in practicality.

  The gist of the present invention will be described with reference to the accompanying drawings.

  A slurry passage portion 3 for introducing a slurry 50 in which abrasive grains 50b are mixed with a liquid 50a and a compressed air passage portion 2 for introducing compressed air are provided. The slurry 50 and the compressed air introduced from the slurry passage portion 3 are provided. The compressed air introduced from the passage portion 2 is mixed in the mixing chamber 4 communicating with the compressed air passage portion 2, and the slurry 50 mixed with the compressed air is fed from the injection hole 6 provided continuously to the mixing chamber 4. A plurality of injection holes 6 are juxtaposed in one direction, and the compressed air passage portion 2 and the mixing chamber 4 correspond to the injection holes 6 respectively. In addition, the present invention relates to a slurry ejector that is provided independently one by one.

  The slurry injection body according to claim 1, wherein the mixing chamber 4 is a hole provided at the bottom of the recess 7 a ″, and the compressed air passage portion 2 corresponding to each hole is provided in the hole. Each of the provided injection cylinders 9 is inserted, and the slurry passage 3 is configured to communicate with the recess 7a ″.

  The slurry jetting body according to claim 2, wherein the slurry passage portion side opening position of the mixing chamber 4 is set to a position higher than the mixing chamber side opening portion position of the compressed air passage portion 2, and the mixing chamber. 4. The slurry injection body according to claim 4, wherein the injection cylinder portion 9 is arranged at the center position of the cross section.

  Moreover, the slurry injection body of any one of Claims 2 and 3 is a slurry injection body characterized in that a plurality of the slurry passage portions 3 are provided.

  Moreover, the slurry injection body of any one of Claims 1-4 WHEREIN: The arrangement | positioning space | interval of the injection holes 6 arranged in parallel by the said one direction is 1.5 times or more of the diameter of this injection hole 6. FIG. The present invention relates to a slurry ejector characterized by that.

  Moreover, the slurry injection body of any one of Claims 1-5 WHEREIN: The said injection hole 6 concerns on the slurry injection body characterized by having a circular cross section.

  Moreover, the slurry injection body of any one of Claims 1-6 WHEREIN: The opening part 6a of the said injection hole 6 concerns on the slurry injection body characterized by the taper shape which becomes a diameter large outside. is there.

  Moreover, the slurry injection body of Claim 7 WHEREIN: The taper angle of the said opening part 6a concerns on the slurry injection body characterized by 60 degrees or more.

  Moreover, the slurry injection body of any one of Claims 1-8 WHEREIN: The diameter of the said injection hole 6 is 5 mm or less, and length is below the diameter dimension value of this injection hole 6, It is characterized by the above-mentioned. This relates to a slurry jet.

  Moreover, the slurry injection body of any one of Claims 1-9 is a slurry injection body characterized by the said to-be-processed object 60 being glass.

  Further, in the wet blasting method using the slurry spray body X according to any one of claims 1 to 10, the slurry spray body X is moved while spraying the slurry 50 from the spray hole 6, The slurry injection body X is moved so that the injection trajectories from the injection holes 6 partially overlap each other, and this is repeated to perform the first step of injecting the slurry 50 onto the object 60 to be processed. The wet blasting method is characterized in that the second step is performed in the same manner as the first step.

  Further, in the wet blasting method using the slurry spray body X according to any one of claims 1 to 10, the slurry spray body X in an initial position is injected while the slurry 50 is sprayed from the spray hole 6. A predetermined length is moved in the direction a to move to the second position, and then the slurry injector X in the second position is moved in the direction b intersecting the one direction a to at least the slurry 50 from the injection hole 6. Are moved to the third position by a length that partially overlaps each of the injection trajectories, and then moved to the fourth position in the opposite direction in parallel with the one direction a by the same length as the predetermined length. The wet blasting method according to the present invention is characterized in that the slurry injection is performed by causing the slurry injection body X to repeat the above movement.

  Since the present invention is configured as described above, it becomes a slurry jet body and a wet blast treatment method that are extremely practical, such as being able to suppress the occurrence of non-uniform abrasive collision marks on the surface of the workpiece.

It is use condition explanatory drawing of a present Example. It is a description exploded perspective view of a present Example. It is a description disassembled perspective view of the principal part of a present Example. It is explanatory sectional drawing of a present Example. It is explanatory drawing of the principal part of a present Example. It is explanatory drawing of the wet blast process in a present Example. It is schematic operation explanatory drawing of a present Example. It is explanatory drawing of the principal part of a prior art example. It is explanatory drawing of the wet blast process in a prior art example.

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

  In the present invention, the slurry 50 introduced from the slurry passage 3 and the compressed air introduced from the compressed air passage 2 are mixed in the mixing chamber 4, and the slurry 50 mixed with the compressed air is connected to the mixing chamber 4. From the injection hole 6 to be processed.

  By the way, the present inventor relates to the problem of the above-described conventional example, that is, the problem that when the workpiece 60 is processed, abrasive collision collision marks are unevenly formed on the surface thereof, the slit-shaped injection holes 36 and As a result of repeating various experiments paying attention to the relationship with the injection energy distribution curve of the slurry 50, when a plurality of injection holes 6 are arranged in one direction instead of the slit-like injection holes 36, for example, in the case of tempered glass It was confirmed that a high-quality product that does not cause uneven light reflection partially different from other parts was obtained.

  When the slurry 50 is sprayed from the spray holes 6 arranged in parallel in one direction, abrasive grain collision traces are uniformly formed on the entire surface of the object 60, and the abrasive grains are processed as in the conventional example. When the collision mark is formed non-uniformly, light reflection different from that of other parts occurs. However, when the abrasive particle collision mark is formed uniformly as a whole as in the present invention, even if the etching process is performed, the whole Therefore, non-uniform light reflection does not occur. In addition, even if the abrasive grain collision trace is formed uniformly, it has been confirmed that the decrease in light transmission performance does not impair the practicality because the abrasive grain collision trace is fine.

  As described above, according to the present invention, the wet blasting process for obtaining extremely good light diffusion performance while maintaining the light transmission performance is performed.

  Specific embodiments of the present invention will be described with reference to the drawings.

  The present embodiment has a slurry passage portion 3 for introducing a slurry 50 in which abrasive grains 50b are mixed with a liquid 50a and a compressed air passage portion 2 for introducing compressed air. The slurry 50 introduced from the slurry passage portion 3 is provided. And the compressed air introduced from the compressed air passage portion 2 are mixed in a mixing chamber 4 communicating with the compressed air passage portion 2, and an injection hole 6 in which a slurry 50 mixed with the compressed air is provided continuously to the mixing chamber 4. This is a slurry injection body X provided in a slurry injection device that is injected from the nozzle to the object to be processed 60.

  Specifically, the slurry injection device is provided on a base body (not shown) through which the object to be processed 60 passes, and includes a slurry injection body X, a slurry transfer section 10 that transfers the slurry 50 to the slurry injection body X, and a slurry. A compressed air transport unit 11 that transports compressed air to the spray body X, and the slurry 50 sprayed from the slurry spray body X is circulated and reused.

  As shown in FIGS. 1 to 4, the slurry injection body X includes a long member 7 that is long in the width direction (left-right direction) and short in the front-rear direction, and a block that is continuously connected to the upper portion of the long member 7. It is comprised from the fitting member 8 of a shape, and the end member 12 connected with the right-and-left both ends of this fitting member 8. FIG.

  The long member 7 is composed of a first long member 7a and a second long member 7b which are provided in a stacked state vertically.

  Further, a plurality of mixing chambers 4 are provided inside the elongate member 7, and a compressed air passage portion 2 for introducing compressed air into the mixing chamber 4 is provided above each mixing chamber 4, and a recess 7a " One side portion (right side in FIG. 4) is provided with a porous slurry passage portion 3 in which horizontally long small holes are arranged side by side, and an injection hole 6 is provided below the mixing chamber 4.

  Specifically, the mixing chamber 4 is configured by providing a hole 7a ′ having a circular cross-section in a vertically penetrating state at the bottom of a recess 7a ″ provided in the long member 7 (first long member 7a). ing.

  In addition, a plurality of rows of holes formed by arranging the holes 7 a ′ constituting the mixing chamber 4 are provided in a direction perpendicular to the length direction of the long member 7.

  In addition, the holes 7a 'constituting the adjacent hole rows are provided in a staggered pattern that is displaced from each other.

  In addition, an injection cylinder portion 9 having a circular cross section constituting the compressed air passage portion 2 is inserted and disposed in the mixing chamber 4 (hole 7a ′), and the compressed air passage portion 2 is disposed at the lower end portion of the injection cylinder portion 9. The mixing chamber side opening is provided.

  The injection cylinder portion 9 constituting the compressed air passage portion 2 has a diameter smaller than that of the mixing chamber 4 (hole 7a ′) and is arranged at the center of the cross section of the mixing chamber 4 (hole 7a ′). An annular gap is provided between the outer peripheral surface of the first hole and the inner surface of the hole 7a ′.

  In addition, a plurality of injection cylinder portions 9 constituting the compressed air passage portion 2 are arranged side by side in the length direction of the long member 7 (second long member 7b), and the injection cylinder portions 9 are arranged in parallel. A plurality of injection cylinder portion rows are provided in a direction orthogonal to the length direction of the long member 7.

  Moreover, the injection cylinder parts 9 which comprise the adjacent injection cylinder part row | line | column are provided in the staggered pattern form mutually displaced.

  Further, the mixing chamber side opening of the compressed air passage portion 2 is set to be positioned below the mixing chamber side opening of the slurry passage portion 3. That is, the position of the slurry passage side opening portion of the mixing chamber 4 is set to a position higher than the position of the mixing chamber side opening portion of the compressed air passage portion 2.

  When compressed air is introduced into the mixing chamber 4 from the compressed air passage portion 2 by this configuration, the slurry 50 and the compressed air fed from the mixing chamber side opening of the slurry passage portion 3 in the mixing chamber 4 are compressed. Will be mixed.

  Further, the upper portion of the first long member 7a related to the long member 7 is provided with a concave portion 7a ″ in the length direction in which the mixing chamber 4 (hole 7a ′) described above is opened in the bottom surface portion. In one side portion of the first long member 7a related to the member 7, a slurry passage portion 3 composed of a laterally small hole penetrating the concave portion 7a "is provided in parallel in the length direction.

  The long member 7 is provided with a plurality of circular through-holes communicating with the lower opening 4 a of the mixing chamber 4 inside, and each through-hole is set as an injection hole 6.

  Specifically, as shown in FIG. 5, the injection holes 6 are juxtaposed with respect to the length direction of the long member 7 at intervals, and are arranged below the injection cylinder portions 9 described above. Is provided. The parallel arrangement interval of the long members 7 between the injection holes 6 is 1.5 times or more the diameter of the injection holes 6 (in this embodiment, about 1 of the diameter (3 mm) of the injection holes 6). .7 spacing (5 mm)).

  The diameter of the injection hole 6 is 5 mm or less, and the length is set to be equal to or less than the diameter dimension value of the injection hole 6 (in this embodiment, the length is 2 mm with respect to the diameter (3 mm) of the injection hole 6). .

  In the present embodiment, a plurality of injection hole arrays in which the injection holes 6 are arranged in parallel are provided in a direction orthogonal to the length direction of the long member 7.

  Further, the injection holes 6 constituting the adjacent injection hole rows are provided in a staggered pattern so as to be displaced from each other.

  The gap between the injection holes 6 constituting the adjacent injection hole rows is substantially the same as the diameter of the injection holes 6 (in this embodiment, an interval (about 6 times the diameter of the injection holes 6) (6 4 mm)).

  The injection hole 6 has a circular cross section, and the opening 6a of the injection hole 6 has a tapered shape (taper angle of 60 degrees or more (90 degrees in this embodiment)) that increases in diameter toward the outside. Among the openings 6a, the openings 6a adjacent to each other in the direction orthogonal to the length direction of the long member 7 are provided so as to partially overlap each other.

  When the slurry 50 is injected from each of these injection holes 6, the injection energy distribution curve of the slurry 50 injected from each of the injection holes 6 is as shown in FIG.

  The fitted member 8 is composed of a first member 8 ′ and a second member 8 ″ assembled in a superposed state on the left and right. The fitted member 8 includes a first member 8 ′ and a second member 8 ″. When the is assembled, a recess 8e that can hold the long member 7 in a sandwiched state is provided.

  As shown in FIGS. 1, 2, and 4, the first member 8 ′ is provided with a compressed air introduction portion 8 a to which a compressed air conveying portion 11 to which compressed air is pumped is connected. A compressed air storage portion 8b that communicates with the air introduction portion 8a and temporarily stores compressed air is provided, and is connected to the upper portion of the long member 7 when the first member 8 ′ and the second member 8 ″ are assembled. The site is provided with a compressed air passage 8c that communicates from the compressed air reservoir 8b to the compressed air passage 2 of the elongate member 7.

  As shown in FIGS. 1, 2, and 4, the second member 8 ″ is provided with a slurry introducing portion 8 d to which a slurry conveying portion 10 to which the slurry 50 is pressure-fed is connected at the upper portion, and the length of the second member 8 ″ is internally A slurry storage part 1 for storing the slurry 50 is provided.

  Further, when assembled to the second member 8 ″, a portion that comes into contact with one side of the long member 7 (the side on which the slurry passage portion 3 is provided) is elongated from the slurry reservoir 1. A slurry passage portion 8 f communicating with the slurry passage portion 3 of the member 7 is provided.

  The second member 8 ″ is connected to the upper portion of the long member 7, and the continuous member and the compressed air passage portion 8c of the first member 8 ′ compress the long member 7 from the compressed air storage portion 8b. A compressed air passage route communicating with the air passage portion 2 is configured.

  The left and right openings of the compressed air reservoir 8b and the slurry reservoir 1 are closed by end members 12.

  The long member 7, the fitted member 8, and the end member 12 are made of a material that does not deform as much as possible, for example, a metal material.

  Of the above-described components, the path through which the slurry 50 passes (for example, the slurry path portion of the long member 7, the inner wall of the slurry storage portion 1, the slurry introduction portion 8d, the inner wall of the slurry passage portion 8f, and the closed side surface of the end member 12). ) Is made of urethane resin, which prevents the slurry 50 (especially abrasive grains 50b) from polishing the path through which the slurry 50 passes. Has been confirmed to extend several times.

  The urethane resin is also provided as a seal member at a portion where the long member 7, the fitted member 8, and the end member 12 are in contact with each other.

  Further, a urethane resin is provided as much as possible in a path through which only compressed air passes (the inner wall of the compressed air introduction portion 8a, the inner wall of the compressed air storage portion 8b, the inner wall of the compressed air passage portion 8c, and the compressed air passage portion 2). The structure which does not provide is adopted. This is because the urethane resin has a large surface frictional resistance, and if the urethane resin is present, the pressure of the compressed air is lost due to contact between the urethane resin and the compressed air.

  A wet blasting method for the object to be processed 60 (tempered glass) using the slurry jetting body X having the above configuration will be described.

  The slurry 50 in which the abrasive grains 50b are mixed with the liquid 50a introduced from the slurry passage 3 and the compressed air introduced from the compressed air passage 2 are mixed in the mixing chamber 4, and this slurry 50 is injected together with the compressed air into the injection hole. It sprays from 6 and hits the surface of the to-be-processed object 60, and processes it.

  Specifically, the slurry injector X is moved while injecting slurry 50 from the injection hole 6, and then the slurry injector X is moved so that the injection trajectories from the injection holes 6 partially overlap each other. To repeat the first step of injecting the slurry 50 onto the workpiece 60, and then to perform the second step in the same manner as the first step. The same process is repeated.

  In this embodiment, a slurry jet X having a width of 9 cm is prepared for testing, and this slurry jet X is moved from one end side to the other end side of the workpiece 60 in one direction (direction a in FIG. 7). It is moved by a predetermined length and subjected to wet blasting, and then pitch-fed in the direction (b direction in FIG. 7) perpendicular to the scanning direction in which wet blasting is performed on the other end side of the object to be processed 60. X is moved from the other end side to the one end side in parallel with the one direction (direction a in FIG. 7) and moved in the opposite direction by the same length as the predetermined length, and then wet blasting is performed. Wet blasting, which is performed while pitch-feeding in the direction (b direction in FIG. 7) orthogonal to the scanning direction in which wet blasting is performed on one end side, and then moving the slurry spray body X from the other end side to one end side, and slurry injection Body X from one end to the other Repeatedly performs the wet blast process performed while moving (see FIG. 7).

  In this wet blasting method, when the processing of the object to be processed 60 (glass) is completed, the interval of the scanning trajectory (position) of the injection holes 6 is equal to or less than the diameter of the injection holes 6, and each An absolute condition is that the total number of scans in the scanning locus (position) is uniform.

  As described above, when the slurry injection body X is moved and the slurry 50 is injected from the injection holes 6 arranged side by side, abrasive collision marks are not partially applied to the surface of the object to be processed 60, and the entire surface is uniformly distributed at a narrow interval. Formed (see FIG. 6). A two-dot chain line in FIG. 6 is an injection energy distribution curve of the slurry 50 injected from the slurry injection body X after pitch feeding.

  When the product thus obtained was etched to produce a product, it was confirmed that a high-quality product that does not cause uneven light reflection partially different from other parts as a whole was obtained.

  That is, when the slurry 50 is injected from the injection holes 6 arranged in parallel in one direction, the energy fluctuation (gradient) in the injection energy distribution curve of the slurry 50 is gentle as compared with the above-described conventional example, and an arbitrary The injection energy distribution curves of the plurality of injection holes 6 are closely overlapped with each other at the position. Therefore, in the overlapped injection energy distribution curves, there are energy fluctuations / changes uniformly over the entire area, not locally. Since the amplitude is slightly (relatively small) with respect to the total amount of energy superposed at an arbitrary position, abrasive grain collision traces are uniformly formed on the entire surface of the workpiece 60.

  Therefore, when the abrasive grain collision traces are formed non-uniformly as in the case of the conventional example, light reflection different from other parts occurs, but the abrasive grain collision traces are uniform throughout as in this embodiment. In the case of being formed, even if the etching process is performed, since the abrasive grain collision trace exists throughout, non-uniform light reflection does not occur.

  Therefore, according to the present embodiment, wet blasting is performed to obtain extremely good light diffusion performance while maintaining light transmission performance.

  In this embodiment, since the injection hole array formed by arranging the injection holes 6 in parallel is a plurality of lines, a good wet blasting process is performed efficiently.

  Further, in the present embodiment, since the injection holes 6 are provided in a staggered pattern that is displaced from each other, the abrasive grain collision traces are more uniformly and uniformly formed on the entire surface of the workpiece 60. become.

  Further, in this embodiment, since the injection hole 6 has a circular cross section, a wet blasting process capable of forming a good abrasive grain collision mark is performed also in this respect.

  Further, in this embodiment, since the opening 6a of the injection hole 6 has a tapered shape with a larger diameter on the outer side, the wet blasting process capable of forming a uniform abrasive grain collision mark is performed also in this respect. become.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

X Slurry ejector 2 Compressed air passage 3 Slurry passage 4 Mixing chamber 6 Injection hole 6a Opening 7a "Recess 9 Injection cylinder
50 slurry
50a liquid
50b abrasive
60 workpiece

Claims (12)

  A slurry passage portion for introducing a slurry in which abrasive grains are mixed in a liquid and a compressed air passage portion for introducing compressed air, and a slurry introduced from the slurry passage portion and a compression introduced from the compressed air passage portion. The air is mixed in a mixing chamber that communicates with the compressed air passage portion, and a slurry that is mixed with the compressed air is injected into an object to be processed from an injection hole that is connected to the mixing chamber. A plurality of the injection holes are juxtaposed in one direction, and the compressed air passage section and the mixing chamber are provided independently one by one corresponding to each of the injection holes. body.   2. The slurry injector according to claim 1, wherein the mixing chamber is a hole provided at a bottom of the recess, and an injection cylinder portion including the compressed air passage corresponding to each hole is provided in the hole. A slurry jetting body, wherein each of the slurry jetting sections is inserted, and the slurry passage section is configured to communicate with the recess.   3. The slurry injector according to claim 2, wherein the slurry passage side opening position of the mixing chamber is set to a position higher than the mixing chamber side opening position of the compressed air passage portion, and the cross-sectional center position of the mixing chamber The slurry injection body is characterized in that the injection cylinder portion is arranged on the surface.   4. The slurry injector according to claim 2, wherein a plurality of the slurry passage portions are provided. 5.   The slurry spray body according to any one of claims 1 to 4, wherein an interval between the injection holes arranged in the one direction is 1.5 times or more a diameter of the injection hole. Slurry jetting body.   The slurry injection body of any one of Claims 1-5 WHEREIN: The said injection hole is a cross-sectional circular shape, The slurry injection body characterized by the above-mentioned.   The slurry spray body according to any one of claims 1 to 6, wherein the opening of the spray hole has a tapered shape with a diameter increasing toward the outside.   The slurry spray body according to claim 7, wherein the taper angle of the opening is 60 degrees or more.   9. The slurry injector according to claim 1, wherein a diameter of the injection hole is 5 mm or less, and a length is a diameter dimension value or less of the injection hole. 10.   The slurry injection body of any one of Claims 1-9 WHEREIN: The said to-be-processed object is glass, The slurry injection body characterized by the above-mentioned.   The wet blasting method using the slurry spray body according to any one of claims 1 to 10, wherein the slurry spray body is moved while spraying slurry from the spray hole, and subsequently sprayed from the spray hole. The slurry ejector is moved so that the trajectories partially overlap each other, and this is repeated to perform the first step of injecting the slurry to the object to be processed, and then in the same manner as the first step. A wet blasting method comprising performing the second step.   11. The wet blasting method using the slurry spray body according to claim 1, wherein the slurry spray body at an initial position is moved by a predetermined length in a direction a while spraying slurry from the spray hole. Next, the slurry injection trajectory of the slurry from at least the injection hole partially overlaps in the direction b intersecting the one direction a with respect to the slurry injection body X at the second position. Move it to the third position by moving it by the length, and then move it to the fourth position by moving the same length as the predetermined length in the opposite direction in parallel with the one direction a. A wet blasting method, wherein the slurry is ejected repeatedly by a slurry ejector.

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