End edge processing unit

Abstract

To provide an end edge processing unit being a blast processing unit for performing wet-blast processing on a workpiece, which performs the wet-blast processing on an end edge of the workpiece, as well as, can reliably prevent a processing liquid such as slurry from being discharged to the outside while achieving downsizing of the blast processing unit.SOLUTION: An end edge processing unit having a processing space provided with a nozzle member which ejects, to an end edge portion of a workpiece, slurry as a mixture of liquid and abrasive grains, includes: transportation means which transports the workpiece in a predetermined direction; an opening part which inserts at least the end edge portion of the workpiece into the processing space and is opened in a slit-state along a conveyance direction of the conveyance means; air-curtain means which ejects air toward the workpiece from the opening part side; and pressure reducing means which reduces atmospheric pressure within the processing space.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a wet blasting processing device equipped with a nozzle member that sprays a slurry mixture of abrasive grains and a liquid such as water onto a workpiece to process the surface of the workpiece, and relates to an end processing unit that processes the edges of a plate-shaped workpiece. [Background technology]

[0002] Conventionally, wet blasting has been performed in which a slurry containing abrasive grains and liquid such as water is sprayed onto a workpiece by compressed air in order to improve the durability of the cutting edge of a cutting tip used in a cutting tool and to remove dirt and burrs from the surface of the workpiece. For this type of wet blasting, various types of wet blasting treatment apparatuses are known according to the shape of the workpiece.

[0003] For example, as described in Patent Document 1, a conventional blast processing unit is a blast processing unit in which a thin workpiece such as a resin film is passed through a processing space within a base in a vertically standing state, and a processing liquid is sprayed onto the thin workpiece inside the processing space to perform wet blast processing. A processing liquid spraying section for spraying the processing liquid is provided inside the processing space, and a work introduction section and a work outlet section are provided in the processing space. The work introduction section and the work outlet section are slit-shaped openings provided on the base and have a width and height sufficient for the thin workpiece to pass through in a vertically standing state. An air seal section is provided in either or both of the work introduction section and the work outlet section. The air seal section is formed by arranging a plurality of air nozzles for spraying or sucking air in the height direction of the thin workpiece at horizontally opposed positions sandwiching the thin workpiece passing through the work introduction section or the work outlet section, and the air pressure for this air spraying or air suction is set to a constant value.

[0004] Such a blast processing unit can reliably prevent the processing liquid from being discharged to the outside, and at the same time, it is possible to provide an epoch-making blast processing unit that exerts unprecedented effects, such as not damaging or damaging the surface of the workpiece. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4480469 Summary of the Invention [Problem to be solved by the invention]

[0006] Conventional blast processing units are blast processing units that perform wet blast processing on thin, film-like workpieces or plate-like workpieces, and by transporting the thin or plate-like workpieces into a processing space, sufficient sealing can be ensured so that the processing liquid is not discharged to the outside, even in a configuration in which multiple air ejection nozzles are arranged.

[0007] However, in conventional blast processing units, the blast processing is performed by inserting the entire workpiece into the processing space to prevent the blast projection from scattering, which causes the blast processing unit to become large. Also, when performing blast processing only on specific parts of the workpiece, such as the edge part, it is necessary to protect parts other than the part to be processed with a mask or the like, and since the blast processing is performed by inserting the entire workpiece into the processing space, the processing liquid adheres to parts other than those that have been blasted, and in order to remove this, a cleaning process that covers the entire width of the workpiece and a drying process are required, which causes the blast processing unit to become complicated.

[0008] The present invention has been made to solve the above-mentioned problems, and aims to provide an edge treatment unit in a blast treatment unit which performs wet blast treatment on a workpiece, in which the edge of the workpiece is inserted into the blast treatment unit to perform wet blast treatment, and the treated part is positioned outside the blast treatment unit while reliably preventing the treatment liquid such as slurry from being discharged to the outside, thereby enabling the blast treatment unit to be made smaller. [Means for solving the problem]

[0009] In order to solve the above problems, the edge processing unit of the present invention is an edge processing unit having a processing space equipped with a nozzle member that sprays a slurry, which is a mixture of liquid and abrasive grains, onto the edge portion of a workpiece, and is characterized in that it is equipped with a transport means for transporting the workpiece in a predetermined direction, an opening that inserts at least the edge portion of the workpiece into the processing space and opens in a slit shape along the transport direction of the transport means, an air curtain means for spraying air from the opening side toward the workpiece, and a pressure reducing means for reducing the air pressure in the processing space.

[0010] In the edge treating unit according to the present invention, it is preferable that the nozzle member injects the slurry from the opening at an angle in a direction toward the edge of the workpiece.

[0011] In the edge processing unit according to the present invention, it is preferable that the air curtain means injects the air from both the front and back sides of the workpiece.

[0012] In addition, in the edge processing unit of the present invention, it is preferable that the air curtain means has an inlet for introducing compressed air and an outlet for spraying the air toward the workpiece, and that the outlet is slit-shaped and opens approximately parallel to the opening.

[0013] In addition, in the edge processing unit of the present invention, it is preferable that the air curtain means is provided in the processing unit main body and is equipped with a cover member having an inclined portion inclined in a cross section perpendicular to the conveying direction and a slope corresponding to the inclined portion, the inlet port being connected to a groove portion formed along the conveying direction of the cover member, and the outlet port being a gap formed between the inclined portion and the slope.

[0014] In the edge processing unit according to the present invention, it is preferable that the processing space includes a slurry recovery section for recovering the slurry sprayed onto the workpiece.

[0015] In the edge processing unit according to the present invention, it is preferable that the processing space includes water washing means for washing the edge portion with water.

[0016] In the edge treating unit according to the present invention, it is preferable that the nozzle member sprays the slurry from both the front and rear sides of the edge portion.

[0017] In the edge processing unit according to the present invention, it is preferable that a pair of the water washing means are arranged symmetrically along the transport direction with respect to the nozzle member. Effect of the Invention

[0018] According to the edge treatment unit of the present invention, the edge, which is the treated part of the workpiece, can be wet blasted, and even if the part other than the treated part is placed outside the blast treatment unit, it is possible to reliably prevent the treatment liquid such as slurry from being discharged to the outside, thereby providing an edge treatment unit that can reduce the size of the blast treatment unit. [Brief description of the drawings]

[0019] [Figure 1] FIG. 2 is a perspective view of an edge processing unit according to an embodiment of the present invention. [Diagram 2] Cross section taken along line AA in FIG. [Diagram 3]Cross-sectional view taken along line B-B in FIG. [Figure 4] FIG. 4 is a perspective view of a lid member used in the edge processing unit according to the embodiment of the present invention. [Diagram 5] Enlarged view of part C in Figure 3. 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 an oblique view of an edge processing unit according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, FIG. 3 is a cross-sectional view taken along line BB in FIG. 1, FIG. 4 is an oblique view of a cover member used in the edge processing unit according to an embodiment of the present invention, and FIG. 5 is an enlarged view of portion C in FIG. 3.

[0022] As shown in Fig. 1, the edge processing unit 10 according to this embodiment has an opening 11 into which a plate-shaped workpiece W, which will be described later, is inserted, and is provided with a nozzle member 12 and a pair of water washing means 13 along a conveying direction T of a conveying means 16, which will be described later. The pair of water washing means 13 are arranged in the order of the water washing means 13, the nozzle member 12, and the water washing means 13, so as to be symmetrical along the conveying direction T of the conveying means 16 with the nozzle member 12 at the center. Note that in this specification, the workpiece to be blasted in the edge processing unit 10 according to this embodiment is described as being a plate-shaped workpiece, but the shape of the workpiece is not limited to being plate-shaped and may be applied to various shapes.

[0023] In addition, the edge processing unit 10 of this embodiment is equipped with a processing unit main body 14 and a lid member 21 attached to the processing unit main body 14, and the lid member 21 and an inclined portion 22 formed on the processing unit main body 14 form an air curtain means 20.

[0024] 1 and 2, the opening 11 is formed in a slit shape that opens along the conveying direction T so that a portion including the edge of the plate-shaped workpiece W formed in a thin plate shape can be inserted into the processing space P formed in the processing unit body 14, and the plate-shaped workpiece W can be conveyed along the conveying direction T. The other end side of the plate-shaped workpiece W that is not inserted into the processing space P is exposed to the outside of the edge processing unit 10 according to this embodiment from the opening 11 via the air curtain means 20.

[0025] The conveying means 16 includes a pair of rollers that rotate while contacting the front and back surfaces of the plate-shaped workpiece W, and a driving means (not shown) that drives the rollers. Note that the driving device can adopt various types that are well known in the art. For example, it is preferable that the plate-shaped workpiece W is conveyed along the conveying direction T by a linear actuator or the like arranged outside the edge processing unit 10 according to this embodiment, and the conveying means 16 is composed of a pair of rollers that suppress vibration and damage to the plate-shaped workpiece W caused by blast projection by the nozzle member 12.

[0026] The nozzle member 12 is attached to the processing unit body 14, and performs surface treatment by spraying abrasives S against the edge portion of the plate-like workpiece W guided by the transport means 16, colliding the abrasives S and removing materials adhering to the edge portion. The sprayed abrasives S are collected in a slurry collection section 17 arranged in the processing unit body 14, and reused after removal of foreign matter, etc.

[0027] The nozzle member 12 may have various known structures, and preferably includes, for example, a housing having a compressed air inlet and a slurry inlet, and a nozzle body fixed to the lower end of the housing. The nozzle body has an injection port 15 at its tip, and the abrasives S introduced from the slurry inlet are injected from the injection port 15 toward the plate-shaped workpiece W by compressed air introduced from the compressed air inlet.

[0028] 3, the nozzle member 12 is disposed at an angle from the opening 11 toward the edge of the plate-shaped workpiece W so that the ejection port 15 faces the processing space P. The inclination angle of the nozzle member 12 is preferably set to 45° to 90°, and more preferably set to 75°.

[0029] In addition, it is preferable that the nozzle members 12 are disposed above and below the processing unit body 14 so that both the front and back sides of the plate-shaped workpiece W can be processed.

[0030] In this embodiment, the plate-shaped workpiece W to be subjected to the wet blasting treatment is described as a base having a core material on which a PET layer is laminated via an interlayer insulating material, but the plate-shaped workpiece W to be processed by the edge processing unit 10 of this embodiment is not limited to this and can be applied to various conventionally known processed members.

[0031] In addition, an explanation will be given of the case where the plate-shaped workpiece W processed by the edge processing unit 10 according to this embodiment is subjected to processing in which abrasive material S is sprayed onto the edge portion in order to remove interlayer insulating material that has leaked from the PET layer.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] The processing space P is a space formed within the processing unit main body 14, and has an exhaust prevention structure to prevent the abrasive material S sprayed by the nozzle member 12 from being exhausted outside the edge processing unit 10 of this embodiment.

[0038] Next, the discharge prevention structure of the edge processing unit 10 according to this embodiment will be described. The processing space P is equipped with a pressure reducing means 18 and a slurry recovery section 17. The pressure reducing means 18 is provided above the processing space P, and reduces the air pressure in the processing space P by a negative pressure generating means such as a pump (not shown). This generates a fluid flow in the processing space P in a direction toward the pressure reducing means 18, preventing the abrasives S sprayed by the nozzle member 12 from flowing toward the opening 11, and preventing the abrasives S from being discharged from the opening 11.

[0039] The slurry recovery section 17 is disposed below the end of the treatment space P opposite to the opening 11, and recovers the abrasives S sprayed by the nozzle member 12. At this time, the sprayed abrasives S flows in the opposite direction to the opening 11 along the flow generated by the pressure reducing means 18, but the gas is drawn upward by the pressure reducing means 18, and the abrasives S containing solids and liquids is recovered by falling toward the slurry recovery section 17 due to gravity.

[0040] In addition, an air curtain means 20 is provided at the opening 11. As shown in Fig. 3, the air curtain means 20 includes a cover member 21 having an inlet 24 for introducing compressed air, and an inclined portion 22 formed on the processing unit body 14.

[0041] The inclined portion 22 is a member attached to the processing unit body 14, and is attached by extending along the opening direction of the opening 11. Similarly to the nozzle member 12 described above, the surface to which the cover member 21 is attached has a slope inclined toward the processing space P in a cross section perpendicular to the transport direction T, and the inclination angle of the slope is preferably formed to be 15° to 75°, and more preferably 60°. The inclination angle of the inclined portion 22 is preferably formed to be smaller than the inclination angle of the nozzle member 12 described above.

[0042] 4, the cover member 21 is an elongated member attached to the inclined portion 22, and has an inclined surface 26 corresponding to the inclination of the inclined portion 22. A groove portion 23 extending along the conveying direction T is formed in the inclined surface 26, and the groove portion 23 is connected to an inlet 24. A predetermined gap is formed between the inclined surface 26 and the inclined surface of the inclined portion 22, and the compressed air that has reached the groove portion 23 is sprayed in a band shape toward the plate-shaped workpiece W from an outlet 25 formed between the inclined surface 26 and the inclined surface of the inclined portion 22.

[0043] The air curtain means 20 injects compressed air in a band shape toward the vicinity of the opening 11 of the plate-shaped workpiece W, and the compressed air is injected at an angle inclined toward the treatment space P. Therefore, after being injected into the plate-shaped workpiece W, the compressed air flows toward the inside of the treatment space P, thereby reliably preventing the abrasive material S remaining in the treatment space P from being discharged to the outside.

[0044] The water washing means 13 sprays a cleaning liquid such as water onto the treated portion of the plate-shaped workpiece W that has been subjected to the blast treatment, thereby washing the treated portion. The water washing means 13 can employ various conventionally known configurations, and therefore a detailed description thereof will be omitted.

[0045] The water washing means 13 is disposed at an angle within the processing space P in the same manner as the nozzle member 12, and the above-mentioned pressure reducing means 18, slurry recovery section 17 and air curtain means 20 prevent the cleaning liquid after water washing from being discharged to the outside through the opening 11.

[0046] As described above, the water washing means 13 is arranged in the order of the water washing means 13, the nozzle member 12, and the water washing means 13 so as to be symmetrical along the conveying direction T of the conveying means 16 with respect to the nozzle member 12. By arranging them in this manner, even when the plate-shaped workpiece W is moved back and forth along the conveying direction T, the blasting treatment by the nozzle member 12 and the water washing after the blasting treatment can be performed. That is, when moving in the forward direction, one of the nozzle member 12 and the water washing means 13 is used, and when moving in the return direction, the nozzle member 12 and the other water washing means 13 are used, so that the blasting treatment and water washing can be reliably performed regardless of whether the workpiece is moved in the conveying direction T or not.

[0047] Next, the operation of the edge processing unit 10 according to this embodiment will be described. As shown in Fig. 5, in the edge processing unit 10 according to this embodiment, the nozzle member 12 is disposed at an angle from the opening 11 toward the edge E of the plate-shaped workpiece W, so that the abrasives S are sprayed obliquely toward the edge E to perform the blasting process.

[0048] Thereafter, the injection material S injected onto the plate-shaped workpiece W rebounds at the edge and stays in the processing space P. However, since a fluid flow is generated in the processing space P in the direction toward the pressure reducing means 18 by the pressure reducing means 18, the injection material S injected by the nozzle member 12 is prevented from flowing toward the opening 11 side, and the injection material S is prevented from being discharged from the opening 11. Further, since the processing space P is provided with a slurry recovery section 17, the injection material S is recovered from the slurry recovery section 17 by the flow toward the pressure reducing means 18 described above.

[0049] Also, among the injection material S injected by the nozzle member 12, the injection material S that rebounds toward the opening 11 side is prevented from being discharged from the opening 11 by the air curtain means 20. At this time, the air curtain means 20 injects compressed air in a band shape onto the plate-shaped workpiece W, and the injection angle of the compressed air is inclined toward the processing space P side, so as to prevent the injected injection material S from being discharged from the opening 11. Further, the compressed air injected by the air curtain means 20 has an inclined injection angle, and after colliding with the plate-shaped workpiece W, it flows toward the inside of the processing space P by the flow toward the pressure reducing means 18 described above. At this time, water droplets and the injection material S adhering to the plate-shaped workpiece W can be blown off, and the plate-shaped workpiece W after water washing can be carried out in a dried state. Therefore, the edge processing unit 10 according to the present embodiment does not require a separate drying means, and the entire unit can be downsized.

[0050] Note that since the nozzle member 12 is arranged so as to correspond to both the front and back surfaces of the plate-shaped workpiece W, both the front and back surfaces can be processed at once. Further, since the plate-shaped workpiece W is conveyed by the driving device and the conveying means 16 so as to be reciprocally movable along the conveying direction T, the edge E of the plate-shaped workpiece W can be continuously subjected to blasting treatment.

[0051] The edge E that has been subjected to the blast treatment is transported by the drive device and transport means 16 and washed with water by the water washing means 13. At this time, since the water washing means 13 are arranged symmetrically along the transport direction T with the nozzle member 12 as the center, when the plate-shaped workpiece W is transported back and forth along the transport direction T, it is possible to perform water washing after the blast treatment during transport in either direction.

[0052] Furthermore, in the edge processing unit 10 of this embodiment, even when blast processing is performed in a state in which the portion including the edge E of the plate-shaped workpiece W is inserted into the processing unit main body 14 through the opening 11 and the remaining portion protrudes outside the edge processing unit 10, it is possible to reliably prevent the abrasive material S from being discharged outside the edge processing unit 10, thereby making it possible to reduce the size of the edge processing unit 10.

[0053] In addition, in the edge processing unit 10 according to this embodiment, the water washing means 13 has been described as being arranged symmetrically in the transport direction T with the nozzle member 12 at the center, but one or more sets of water washing means 13 and nozzle members 12 may be arranged in the transport direction. In addition, although the nozzle members 12 and water washing means 13 have been described as being arranged on both the front and back sides, they may be arranged on only one side. 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]

[0054] 10 edge processing unit, 11 opening, 12 nozzle member, 13 water washing means, 14 processing unit body, 15 injection port, 16 transport means, 17 slurry recovery section, 18 pressure reduction means, 20 air curtain means, 21 cover member, 22 inclined portion, 23 groove portion, 24 inlet, 25 outlet, 26 inclined surface, E edge, P processing space, S injection material, T transport direction, W plate-shaped workpiece.

Claims

1. An edge processing unit having a processing space provided with a nozzle member for spraying a slurry, which is a mixture of liquid and abrasive grains, onto an edge portion of a workpiece, A conveying means for conveying the work in a predetermined direction; an opening portion for inserting at least the edge portion of the workpiece into the processing space and opening in a slit shape along a conveying direction of the conveying means; An air curtain means for spraying air from the opening side toward the workpiece; and a pressure reducing means for reducing the air pressure within the processing space.

2. 2. The edge treatment unit according to claim 1, The nozzle member ejects the slurry from the opening at an angle toward the edge of the workpiece.

3. 2. The edge treatment unit according to claim 1, The air curtain means is adapted to spray air from both the front and back sides of the workpiece.

4. 2. The edge treatment unit according to claim 1, The air curtain means includes an inlet for introducing compressed air and an outlet for spraying the air toward the workpiece, The edge processing unit, wherein the outlet is a slit-like opening that is substantially parallel to the opening.

5. 5. The edge treatment unit according to claim 4, the air curtain means is provided in the processing unit body and includes a lid member having an inclined portion inclined in a cross section perpendicular to the conveying direction and an inclined surface inclined corresponding to the inclined portion, the inlet is connected to a groove portion formed in the lid member along the conveying direction, The edge processing unit, wherein the outlet is a gap formed between the inclined portion and the inclined surface.

6. 2. The edge treatment unit according to claim 1, The edge processing unit is characterized in that the processing space is provided with a slurry recovery section that recovers the slurry sprayed onto the workpiece.

7. 2. The edge treatment unit according to claim 1, The edge processing unit is characterized in that the processing space is provided with a water washing means for washing the edge portion with water.

8. 2. The edge treatment unit according to claim 1, The nozzle member ejects the slurry from both the front and rear sides of the edge portion.

9. 8. An edge treatment unit according to claim 7, The edge processing unit is characterized in that a pair of the water washing means are arranged symmetrically in the transport direction with the nozzle member as the center.

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