WO2014073472A1 - 初期クラック形成装置、及び形成方法 - Google Patents
初期クラック形成装置、及び形成方法 Download PDFInfo
- Publication number
- WO2014073472A1 WO2014073472A1 PCT/JP2013/079680 JP2013079680W WO2014073472A1 WO 2014073472 A1 WO2014073472 A1 WO 2014073472A1 JP 2013079680 W JP2013079680 W JP 2013079680W WO 2014073472 A1 WO2014073472 A1 WO 2014073472A1
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- WO
- WIPO (PCT)
- Prior art keywords
- initial crack
- plate glass
- initial
- glass
- crack forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/10—Glass-cutting tools, e.g. scoring tools
- C03B33/105—Details of cutting or scoring means, e.g. tips
- C03B33/107—Wheel design, e.g. materials, construction, shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/18—Means for removing cut-out material or waste
- B26D7/1845—Means for removing cut-out material or waste by non mechanical means
- B26D7/1863—Means for removing cut-out material or waste by non mechanical means by suction
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
- C03B33/0235—Ribbons
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
- C03B33/03—Glass cutting tables; Apparatus for transporting or handling sheet glass during the cutting or breaking operations
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
- C03B33/037—Controlling or regulating
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/09—Severing cooled glass by thermal shock
- C03B33/091—Severing cooled glass by thermal shock using at least one focussed radiation beam, e.g. laser beam
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/10—Glass-cutting tools, e.g. scoring tools
- C03B33/105—Details of cutting or scoring means, e.g. tips
Definitions
- the present invention relates to an initial crack forming apparatus and a forming method for forming an initial crack serving as a starting point of cutting by laser cleaving by scratching an end portion on the front side in the transport direction of the plate glass while transporting the plate glass.
- a laser cleaving method as disclosed in Patent Document 1 is known as one of methods for cutting plate glass.
- the following is mentioned as an example of the embodiment of this laser cleaving method.
- a conveying means such as a conveyor along the conveyance path
- an initial crack that is the starting point of cutting is formed on the upstream side of the sheet glass in the conveyance direction on the upstream side of the path.
- the initial crack formed at the end passes through the laser irradiation region and the injection region of the coolant (water, etc.) adjacent to the irradiation region along the conveyance direction.
- Transport plate glass Transport plate glass.
- the sheet glass G when cutting the plate glass, the following problems may occur. As shown in FIG. 12, during the conveyance of the sheet glass G loaded on the conveyor 100 in the T direction toward the downstream side, the sheet glass G should originally pass through in order to perform cutting due to the influence of vibration or the like. There may be a positional shift from the position (the position indicated by the two-dot chain line in the figure).
- the initial crack C formed in the end portion Ga of the glass sheet G does not pass through the laser irradiation region and the refrigerant injection region, and the heating unit Z heated by the laser and the refrigerant
- the cooling part Y that has been cooled to the initial crack C is generated at a position shifted from the initial crack C. Therefore, although thermal stress (tensile stress) is generated in the plate glass G, the initial crack C that becomes the starting point of cutting does not exist at the position where the thermal stress is generated. As a result, it becomes impossible to advance the cleaved portion from the initial crack C, and cutting of the glass sheet G may be prevented.
- Patent Document 2 discloses a conveying unit that conveys a plate glass, a crack forming member in which a projection group including a plurality of projections is provided on a portion facing the plate glass, and the crack.
- a crack forming apparatus provided with a supporting means for supporting a forming member so as to be close to and away from the plate glass (movable up and down).
- each initial crack included in the initial crack group is formed by a force acting in a direction opposite to the conveying direction of the plate glass. For this reason, an excessive force is applied to the end portion, causing a situation in which the plate glass is cracked or damaged. As a result, there has been a problem that the value of the plate glass as a product is greatly impaired, or it becomes impossible to use it as a product.
- the present invention made in view of the above circumstances has a technical problem of avoiding the occurrence of cracks and damage of the plate glass when forming the initial crack group at the end of the plate glass being conveyed.
- An initial crack forming apparatus for forming an initial crack group in which a plurality of initial cracks are gathered, having a rotating wound portion that scratches the end portion while rotating in the direction in which the plate glass is pulled in the conveying direction, and the rotating scratch It is characterized in that the rotational peripheral speed of the part is faster than the conveying speed of the plate glass.
- the rotating scratched portion damages the end of the plate glass while rotating in the direction in which the plate glass is pulled in the transport direction, and therefore the rotary scratched portion exerts a force against the transport direction on the plate glass. It is possible to form an initial crack group at the end without acting on the end. Thereby, it is possible to prevent an excessive force from being applied to the end portion, and to avoid as much as possible the occurrence of a situation in which the plate glass is cracked or damaged. Moreover, since the rotational peripheral speed of the rotating scratched part is faster than the conveying speed of the plate glass, it is possible to reliably form the initial crack group at the end part.
- the rotating scratched portion is a shaft portion that rotates about a rotation axis extending along the surface direction of the plate glass, and a sheet-like shape that extends radially from the shaft portion and has flexibility. It is preferable to provide a wound member.
- the sheet-like wound member has flexibility, when the initial crack group is formed, the wound member in contact with the plate glass is subjected to a force applied to the wound member. It bends and deforms accordingly. Thereby, the following preferable effects are obtained.
- Positioning of the rotationally scratched part with respect to the plate glass becomes extremely easy. That is, the degree of deformation of the scratching member varies depending on the distance between the plate glass and the shaft portion of the rotary scratching portion. Therefore, regardless of the length of the separation distance between the plate glass and the shaft portion, the force applied to the plate glass as a reaction force of the force applied to the wound member is excessive due to the bending deformation of the wound member. Can be suppressed.
- the initial crack group can be formed satisfactorily without breaking the plate glass more reliably.
- the pressing force applied to the conveying means from the scratching member and the rotation axis of the contact portion where the scratching member and the conveying means contact each other It is possible to set conditions for forming the initial crack group only by two elements along the length along the direction. Therefore, management of this condition can be simplified.
- the conveying means may be damaged by the scratching member and dust may be generated. In such a case, the generated dust can be sucked and collected together with the glass powder. Become.
- the rotating wound portion is covered from above, and further includes second suction means for sucking glass powder generated from the plate glass when the rotating wound portion damages the end portion.
- the glass powder generated from the plate glass and diffused by the centrifugal force due to the rotation of the rotating scratched part (scratching member) is sucked by the second suction means. It becomes possible to collect. Also, when dust is generated from the conveying means, it can be sucked and collected together with the glass powder.
- an initial crack forming apparatus for forming an initial crack group in which a plurality of initial cracks are gathered, and having an initial crack forming portion that scratches the end portion while moving in accordance with the conveying direction of the plate glass, the initial crack
- the moving speed of the forming part is characterized by being substantially the same as the conveying speed of the plate glass.
- the moving speed of the initial crack forming portion is substantially the same as the conveying speed of the plate glass” means that the moving speed of the initial crack forming portion is in the range of 90% to 100% based on the conveying speed of the plate glass. Means that. The range is preferably 95% to 100%.
- the initial crack forming section follows the sheet glass conveyance direction and damages the edge of the sheet glass while moving at a speed substantially the same as the sheet glass conveyance speed.
- the initial crack forming unit can form the initial crack group at the end portion without applying a force against the sheet glass to the conveying direction.
- the initial crack group is formed in a state in which the relative positional relationship between the initial crack forming portion and the plate glass (end portion) does not substantially change in the conveying direction of the plate glass.
- the rotational peripheral speed of this rotation damage part is the said sheet glass. It is preferable that the speed is substantially the same.
- “the rotational peripheral speed of the rotationally scratched part is substantially the same as the conveying speed of the plate glass” means that the rotational peripheral speed of the rotationally scratched part is within a range of 90% to 100% based on the conveying speed of the plate glass. Means that The range is preferably 95% to 100%.
- the initial crack group is formed such that the initial crack forming portion itself presses the end portion while rotating as the rotating scratched portion.
- the configuration of the initial crack forming apparatus can be simplified.
- the rotating scratched portion is a shaft portion that rotates about a rotation axis extending along the surface direction of the plate glass, and a sheet-like shape that extends radially from the shaft portion and has flexibility. It is preferable to provide a wound member.
- the initial crack forming portion is configured to damage a portion of the end portion excluding the edge portion of the plate glass.
- the initial crack group is formed in the portion excluding the edge portion of the plate glass, the strength of the plate glass at the end portion is kept high compared to the case where the initial crack group is formed in the edge portion. Is done. Thereby, after the formation of the initial crack group, it is possible to prevent as much as possible the occurrence of a situation in which the sheet glass being conveyed is broken by the action of an external force or the like.
- the sheet glass transport path further includes a scraping means for removing wrinkles generated at the end portion upstream of the initial crack formation region for forming the initial crack group.
- the wrinkle removing means removes wrinkles, so that the wrinkles at the end are initial when forming the initial crack group. It is possible to prevent a collision with a crack forming part (rotation scratching part). For this reason, it is possible to avoid as much as possible the occurrence of a situation where the plate glass is cracked.
- the above-described initial crack forming apparatus can enjoy the same operations and effects as those already described.
- the moving speed of the tool is characterized by being substantially the same as the conveying speed of the plate glass.
- the above-described initial crack forming apparatus can enjoy the same operations and effects as those already described.
- the end portion when forming the initial crack group at the end portion of the plate glass being conveyed, the end portion can be damaged without acting a force against the conveyance direction. Since an excessive force is prevented from being applied, it is possible to avoid the occurrence of cracks in the plate glass.
- a glass ribbon having a thickness of 300 ⁇ m or less is set as an object for forming the initial crack group.
- edge part formed in the both ends in the width direction of a glass ribbon from the product part utilized as a product by laser cleaving it is an initial crack group at the edge part of the said glass ribbon.
- a thickness of the glass ribbon used as the object (cut object) which forms an initial crack group it is preferable that it is 200 micrometers or less, and it is more preferable that it is 100 micrometers or less.
- FIG. 1 is a sectional view showing an initial crack forming apparatus according to the first embodiment of the present invention
- FIG. 2 is a plan view thereof.
- the initial crack forming apparatus 1 includes a scooping table 2 as a scooping means for scooping the glass ribbon G while passing the glass ribbon G along the upper surface 2a;
- the belt conveyor 3 that transports the glass ribbon G that has passed through the scraping table 2 in the transport direction B, and the end portion Ga on the front side in the transport direction B are rotated in the initial crack formation region S with respect to the glass ribbon G that is being transported.
- a first suction unit that sucks the glass powder K generated from G, a suction unit 5 as a second suction unit, and a suction unit 6 are provided.
- the rafting stand 2 is installed on the upstream side of the initial crack formation region S on the conveyance path of the glass ribbon G.
- the upper surface 2a of the eaves table 2 is gently curved so that the center portion is higher than both ends in the width direction of the glass ribbon G.
- the shape of the upper surface 2a may be, for example, a trapezoidal shape in which the central portion is flat and both end portions are inclined.
- edge part G1 formed in the width direction both ends of the glass ribbon G is comprised so that it may be in the state which protruded from the width direction both ends of the upper surface 2a, and floated. As a result, the glass ribbon G passing through the scooping table 2 along the upper surface 2a is pulled in the width direction by the weight of the ear portion G1, and the wrinkles generated on the glass ribbon G are removed.
- the belt conveyor 3 includes a driving roller and a driven roller (not shown), and a belt that is wound around both rollers, and the driving roller is driven to rotate so that the belt continuously moves in the conveyance direction B. It is configured.
- the glass ribbon G that passes through the cradle 2 and is conveyed by the belt conveyor 3 extends in the longitudinal direction of the glass ribbon G, and the planned cutting line X that becomes the boundary between the ear part G1 and the product part G2 is , And conveyed so as to extend in parallel with the conveying direction B.
- the flap wheel 4 is installed at the position where the planned cutting line X passes below. Then, a shaft portion 4a connected to a rotational drive source (not shown) (for example, an air porter, a spindle motor, etc.) and a plurality of polishing cloths 4b serving as scratching members extending radially from the shaft portion 4a are provided.
- the flap wheel 4 rotates so that its rotational peripheral speed is faster than the conveying speed of the glass ribbon G when the initial crack group CG is formed. Further, the flap wheel 4 is configured to be able to approach and leave the glass ribbon G (belt conveyor 3) by moving along the Z direction shown in FIG.
- the shaft portion 4a extends along the surface direction of the glass ribbon G, is formed in a columnar shape, and is configured to rotate in the A direction about the rotation axis O.
- the polishing pad 4b has a rectangular shape, and one side of the rectangle is fixed to the outer peripheral surface of the shaft portion 4a.
- a plurality of polishing cloths 4b are arranged radially at an equal pitch.
- abrasive grains for damaging the end portion Ga of the glass ribbon G are adhered to the entire surface of the polishing pad 4b on the front side in the rotation direction (direction A).
- the abrasive grains various abrasive grains such as alumina and carborundum can be used.
- the polishing pad 4b has flexibility, and can be bent and deformed according to the force applied to the polishing pad 4b.
- the length of the polishing pad 4b in the radial direction is longer than the separation distance between the belt conveyor 3 and the shaft portion 4a when the initial crack group CG is formed.
- the outer diameter dimension d of the flap wheel 4 is preferably in the range of 25 mm ⁇ d ⁇ 200 mm.
- the rotational peripheral speed of the flap wheel 4 is preferably 1.5 to 10 times the conveying speed of the glass ribbon G.
- the suction unit 5 is fixedly installed on the front side of the glass ribbon G with respect to the flap wheel 4 in the transport direction B. And it is connected to a negative pressure generator (not shown) (for example, a vacuum pump) that generates a negative pressure for sucking the glass powder K generated from the glass ribbon G. Further, the suction port formed at the tip of the suction device 5 has a wide shape along the surface direction of the glass ribbon G. And if formation of the initial crack group CG by the flap wheel 4 (polishing cloth 4b) is started, suction will be started and the glass powder K which generate
- a negative pressure generator for example, a vacuum pump
- the suction unit 6 covers the flap wheel 4 from above, and is connected to a negative pressure generator (not shown) in the same manner as the suction unit 5. Moreover, the suction port formed in the lower end of the suction device 6 has a substantially semicylindrical longitudinal side surface shape.
- the height position of the flap wheel 4 when the initial crack group CG is formed at the end Ga of the glass ribbon G is positioned.
- the flap wheel 4 is lowered along the Z direction to a position where the polishing pad 4b and the belt conveyor 3 are in contact with each other.
- the value of pressing force P (F / W) [N / mm] per unit width which rotates the flap wheel 4 in the non-contact state with the glass ribbon G and loads it from the polishing pad 4b to the belt conveyor 3 is obtained. , 0.02 ⁇ P ⁇ 0.15 so that the height position of the flap wheel 4 is adjusted and positioned.
- the pressing force F [N] can be measured with a load cell or the like attached to the belt conveyor 3.
- the initial crack group CG is formed by only two elements having a length W (W shown in FIG. 3 in the present embodiment) in the direction along the rotational axis O at the contact portion between the cloth 4b and the belt conveyor 3. Conditions can be set. Therefore, management of this condition can be simplified.
- the polishing cloth 4b provided in the flap wheel 4 has flexibility, when adjusting P, positioning of the flap wheel 4 with respect to the glass ribbon G becomes very easy. . That is, the degree of deformation of the polishing pad 4b varies depending on the distance between the glass ribbon G and the shaft portion 4a of the flap wheel 4. Therefore, regardless of the distance between the glass ribbon G and the shaft portion 4a, the force applied to the glass ribbon G as a reaction force of the force applied to the polishing cloth 4b due to the bending deformation of the polishing cloth 4b is as follows: It can suppress becoming excessive.
- the flap wheel 4 When the height position of the flap wheel 4 during the formation of the initial crack group CG is positioned, the flap wheel 4 rises to a height position that does not contact the glass ribbon G and the belt conveyor 3 along the Z direction and waits. . Thereafter, when a sensor (not shown) detects the end portion Ga of the glass ribbon G conveyed from the upstream side, the flap wheel 4 is lowered along the Z direction to a pre-positioned height position. Then, as shown in FIG. 4, the initial crack group CG is formed at the front end portion Ga in the transport direction B by the rotation of the flap wheel 4.
- the wrinkle table 2 removes the wrinkles. Thereby, it is possible to prevent the end portion Ga from colliding with the flap wheel 4 when the initial crack group CG is formed. This makes it possible to avoid as much as possible the occurrence of a situation in which the glass ribbon G is cracked.
- the flap wheel 4 (abrasive cloth 4b) damages the end portion Ga of the glass ribbon G while rotating in the direction in which the glass ribbon G is pulled in the transport direction B. Therefore, the polishing pad 4b can form the initial crack group CG at the end portion Ga without causing the glass ribbon G to act against the conveyance direction B. Further, since the polishing cloth 4b has flexibility and the polishing cloth 4b in contact with the glass ribbon G bends and deforms according to the force applied to the polishing cloth 4b, the polishing cloth 4b becomes the glass ribbon. It is possible to avoid an excessive force (frictional force) for pulling G in the conveyance direction B.
- the width of the initial crack group CG formed at the end Ga is preferably about 10 to 30 mm.
- the polishing cloth 4b is arranged at an equal pitch on the outer peripheral surface of the shaft portion 4a, it is possible to avoid occurrence of abnormal vibration in the rotating flap wheel 4.
- the polishing cloth 4b is bent in each of the large and small portions of the undulation and warpage due to deformation of the polishing cloth 4b, and the glass in the vicinity thereof is deformed. Press. Thereby, it is possible to load an appropriate force to damage the end portion Ga.
- the conveyance direction B of the glass ribbon G and the width direction of the end portion Ga are not orthogonal to each other, the polishing cloth 4b is deformed, and the tip portion (contact portion with the glass ribbon G) is in the width direction.
- the end Ga is damaged along the direction orthogonal to the direction. Therefore, also in this case, the initial crack group CG can be formed in a direction orthogonal to the width direction of the end portion Ga.
- the glass powder K generated from the glass ribbon G and scattered forward in the conveyance direction B and the glass powder K diffused by the centrifugal force generated by the rotation of the flap wheel 4 are aspirator. 5 and aspirator 6. Therefore, the fear that these glass powders K adhere to the glass ribbon G can be reduced, and eventually the deterioration of the quality of the plate glass produced from the glass ribbon G can be prevented.
- the belt conveyor 3 may be damaged by the polishing cloth 4b and dust may be generated, it is possible to collect the generated dust together with the glass powder K with both suction devices 5 and 6 in such a case. .
- the flap wheel 4 When the formation of the initial crack group CG with respect to the end portion Ga of the glass ribbon G is completed, the flap wheel 4 is raised along the Z direction in order to prevent unnecessary scratches from being engraved on the glass ribbon G.
- the time from when the formation of the initial crack group CG by the flap wheel 4 is started until the flap wheel 4 is raised is preferably about 1.0 second.
- carborundum is used as the abrasive, the glass can be damaged more deeply. For this reason, even if it is a case where the site
- FIG. 5 is a cross-sectional view showing the initial crack forming apparatus 1 according to the second embodiment of the present invention.
- the initial crack forming apparatus 1 according to the second embodiment is different from the initial crack forming apparatus according to the first embodiment in that the belt conveyor 3 that conveys the glass ribbon G is divided into two groups. And the support roller 7 for supporting the glass ribbon G being conveyed between the belt conveyors 3 and the glass powder generated from the glass ribbon G and scattered below the support roller 7.
- a suction device 8 for sucking and collecting K is provided.
- the support roller 7 is formed in a cylindrical shape and rotates in the A ′ direction around the rotation axis O ′. Unlike the flap wheel 4, the support roller 7 does not have a rotational drive source and is configured to rotate by friction with the polishing cloth 4 b provided on the flap wheel 4 or the glass ribbon G. . That is, in the opposing part of the flap wheel 4 and the support roller 7, it rotates so that the moving direction along the tangent of both these outer periphery may correspond.
- the aspirator 8 is connected to a negative pressure generator (not shown) similarly to the aspirator 5 and the aspirator 6.
- the suction port formed at the upper end of the suction device 8 extends in a direction along the rotational axis O ′ of the support roller 7. Then, when the formation of the initial crack group CG on the end Ga by the flap wheel 4 is started in the initial crack formation region S, the glass powder K generated and scattered from the glass ribbon G is sucked and collected. And when the glass ribbon G finishes passing over the suction device 8, the suction is stopped.
- the belt conveyor 3 may be damaged by the polishing cloth 4b, and dust may be generated from the belt conveyor 3.
- the polishing pad 4b contacts only the support roller 7 except for the glass ribbon G.
- the support roller 7 rotates so that the moving direction along the tangent of the outer periphery may correspond with the direction along the tangent of the outer periphery of the flap wheel 4 in a part facing the flap wheel 4 due to friction with the polishing pad 4b. .
- the support roller 7 can be prevented from being scraped off by contact with the polishing pad 4b as much as possible, and the generation of dust from the support roller 7 can be suppressed.
- FIG. 6 is a cross-sectional view showing the initial crack forming apparatus 1 according to the third embodiment of the present invention.
- the initial crack forming apparatus 1 according to the third embodiment is different from the initial crack forming apparatus according to the first embodiment in that both suction devices 5 and 6 are removed, and a flap wheel. 4 is different in the rotational peripheral speed and the part where the initial crack group CG is formed with respect to the end portion Ga of the glass ribbon G.
- the flap wheel 4 comprises the initial stage crack formation part (initial stage crack formation tool).
- the flap wheel 4 rotates so that the rotational peripheral speed thereof is substantially the same as the conveying speed of the glass ribbon G when the initial crack group CG is formed.
- the glass ribbon G is rotated so as to have a rotational peripheral speed within a range of 90% to 100%, preferably within a range of 95% to 100%, based on the conveyance speed of the glass ribbon G.
- the flap wheel 4 is initially waiting at a height position where it does not contact the glass ribbon G and the belt conveyor 3. And after the edge part of the conveyance direction B front side in the glass ribbon G passes just under the rotating shaft center O of the flap wheel 4, as mentioned later, it follows a Z direction to the height position previously positioned. And descends to damage the end Ga. Thereby, as shown in FIG. 7, the flap wheel 4 is configured to form an initial crack group CG in a portion of the end portion Ga of the glass ribbon G excluding the edge portion.
- the length of the contact portion between the polishing cloth 4b and the belt conveyor 3 is W [mm]
- the height position of the flap wheel 4 when the initial crack group CG is formed at the end Ga of the glass ribbon G is positioned.
- the height position of the wheel 4 is adjusted and positioned. In this way, the height position of the flap wheel 4 when the initial crack group CG is formed is positioned. Then, when the positioning is completed, the flap wheel 4 is raised along the Z direction to stand by.
- the flap wheel 4 (abrasive cloth 4 b) is in the direction in which the glass ribbon G is pulled in the transport direction B and is substantially the same as the transport speed of the glass ribbon G.
- the edge part Ga of the glass ribbon G is damaged while rotating at the rotational peripheral speed.
- the polishing pad 4b can form the initial crack group CG in the end portion Ga without causing the glass ribbon G to act against the conveyance direction B. Thereby, it is possible to prevent an excessive force from being applied to the end portion Ga, and to avoid the occurrence of a situation in which the glass ribbon G is cracked or damaged as much as possible.
- the actions and effects already described in the first embodiment can be obtained, but the scattering of the glass powder K and the cracking of the glass ribbon G can be prevented. From the standpoint of prevention, it has more excellent actions and effects.
- the initial crack group CG when forming the initial crack group CG, the initial crack group is in a state where the relative positional relationship between the polishing cloth 4b and the glass ribbon G (end portion Ga) does not substantially change in the transport direction B of the glass ribbon G. A CG is formed. Thereby, scattering of the glass powder K etc. which generate
- the initial crack group CG is formed at a portion excluding the edge portion of the glass ribbon G, the strength of the glass ribbon G at the end portion Ga is higher than when the initial crack group is formed at the edge portion. Retained. Thereby, after the initial crack group CG is formed, it is possible to prevent as much as possible the occurrence of a situation in which the glass ribbon G being conveyed is cracked by the action of external force or the like.
- the action and effect of the initial crack forming method according to the third embodiment can also be obtained by the initial crack forming method using the initial crack forming apparatus according to the fourth embodiment described later.
- the end crack forming section unlike the initial crack forming apparatus according to the fourth embodiment, the end crack forming section itself presses the end Ga while rotating as the flap wheel 4.
- the initial crack group CG is formed. Therefore, the configuration of the initial crack forming apparatus 1 can be simplified.
- the initial crack forming apparatus 1 divides the belt conveyor 3 that conveys the glass ribbon G into two, as in the initial crack forming apparatus according to the second embodiment. It is good also as a structure which installs the support roller 7 which supports the glass ribbon G in conveyance between the belt conveyors 3.
- FIG. 1 the suction device 8 for sucking the glass powder K may not be provided.
- FIG. 8 is a cross-sectional view showing the initial crack forming apparatus 1 according to the fourth embodiment of the present invention.
- the initial crack forming apparatus 1 according to the fourth embodiment is different from the initial crack forming apparatus according to the first embodiment in that both suction devices 5 and 6 are removed, and a glass ribbon.
- an initial crack forming member 9 having a plurality of protrusions 9 a is provided instead of the flap wheel 4.
- the initial crack forming member 9 constitutes an initial crack forming portion (initial crack forming tool).
- the initial crack forming member 9 is connected to the slide member 11 via an arm 10 that moves (lifts) along the Z direction. As the slide member 11 moves along the guide rail 12 extending parallel to the conveyance direction B of the glass ribbon G, the initial crack forming member 9 moves in the A direction.
- the initial crack forming member 9 (sliding member 11) is initially waiting at the upstream end of the guide rail 12 (the right end of the guide rail 12 in FIG. 8), and a glass ribbon is directly below the initial crack forming member 9.
- the movement starts after the end Ga of G has passed.
- the initial crack formation member 9 follows the conveyance direction B of the glass ribbon G, and becomes a structure which moves to A direction at the substantially the same speed as the conveyance speed of the glass ribbon G.
- the moving speed of the initial crack forming member 9 moves at a speed in the range of 90% to 110%, preferably in the range of 95% to 105%, based on the conveyance speed of the glass ribbon G.
- the initial crack forming member 9 has a plurality of protrusions 9a on the lower surface thereof.
- the plurality of protrusions 9a are arranged along the longitudinal direction and the width direction of the glass ribbon G. And by the downward movement of the initial crack forming member 9 accompanying the operation of the arm 10, the plurality of protrusions 9 a press the portion excluding the edge portion of the end portion Ga of the glass ribbon G, and the initial crack group CG is It is the structure to form.
- the initial crack forming member 9 that has completed the formation of the initial crack group CG rises with the operation of the arm 10 and returns to the initial position by the movement of the slide member 11 in the direction opposite to the A direction. It is.
- the initial crack forming member 9 follows the transport direction B of the glass ribbon G and moves at a speed substantially the same as the transport speed of the glass ribbon G.
- the edge part Ga of the glass ribbon G is damaged.
- the initial crack forming member 9 can form the initial crack group CG at the end Ga without causing the glass ribbon G to act against the conveying direction B. Thereby, it is possible to prevent an excessive force from being applied to the end portion Ga, and to avoid the occurrence of a situation in which the glass ribbon G is cracked or damaged as much as possible.
- the initial positional relationship between the initial crack forming member 9 and the glass ribbon G (end portion Ga) is not changed substantially in the conveying direction B of the glass ribbon G.
- a crack group CG is formed. Thereby, scattering of the glass powder K etc. which generate
- the initial crack group CG is formed at a portion excluding the edge portion of the glass ribbon G, the strength of the glass ribbon G at the end portion Ga is higher than when the initial crack group is formed at the edge portion. Retained. Thereby, after the initial crack group CG is formed, it is possible to prevent as much as possible the occurrence of a situation in which the glass ribbon G being conveyed is cracked by the action of external force or the like.
- the initial crack forming apparatus is not limited to the configuration described in each of the above embodiments.
- the flap wheel provided in the initial crack forming apparatus according to the first to third embodiments described above may have a shape as shown in FIGS. 9a, 9b, and 9c.
- FIG. 9a when the polishing pad 4b is inclined, the end part Ga of the glass ribbon G is sequentially formed from one end of the polishing pad 4b to the other end in the direction along the rotational axis O. Will come in contact with. Therefore, it becomes possible to damage the end Ga more reliably. Further, as shown in FIG.
- the polishing cloth 4b provided in the flap wheel 4 is divided into a plurality of pieces in the direction along the rotation axis O, the initial crack group is formed in the glass having swell and warpage. In addition, the formation can be carried out satisfactorily. Further, when the polishing cloth 4b is not divided into a plurality of parts, the length of the polishing cloth 4b in the direction along the rotational axis O (hereinafter referred to as the width of the polishing cloth 4b in this paragraph) becomes longer. At both ends of the width, the end portion Ga of the glass ribbon G can be damaged without any problem, while at the center portion of the width, it may be difficult to damage the end portion Ga.
- the polishing cloth 4b is divided into a plurality of parts, and the entire polishing cloth 4b is configured by arranging a plurality of short polishing cloths. It is possible to damage the end portion Ga without causing any problems. Furthermore, as shown in FIG. 9c, when the corner portions positioned at both ends of the width of the polishing pad 4b are rounded into an R shape, the glass is further hardly broken.
- a metal member such as steel wool, a member obtained by adding abrasive grains to a resin fiber, or the like can be used as the scratch member.
- the ratio of the length of the polishing cloth (scratching member) to the outer diameter of the flap wheel and the number of polishing cloths provided in the flap wheel can be changed as appropriate. For example, when the ratio of the length of the polishing cloth is increased or when the number of polishing cloths is decreased, the flexibility of the polishing cloth can be increased. Furthermore, it is good also as a structure which a flap wheel moves synchronizing with the movement to the conveyance direction of a glass ribbon. In this way, the initial crack group can be formed more reliably. In the case of such a configuration, for example, in the initial crack forming apparatus according to the first embodiment described above, if the suction device for sucking the glass powder is also configured to move in synchronization with the flap wheel, it is ensured. Glass powder can be sucked and collected.
- the length along the rotation axis of the flap wheel may be increased, or a plurality of flap wheels may be arranged.
- a plurality of flap wheels may be arranged in a straight line or in a staggered pattern.
- the flap wheel is used as the rotating wound portion.
- the polishing band 13 as shown in FIG. 10 is used as the rotating wound portion. it can.
- components having the same function or shape as those of the initial crack forming apparatus according to the above-described embodiments are denoted by the same reference numerals, and redundant description is omitted.
- the polishing band 13 includes a cylindrical shaft portion 13a that rotates about the rotation axis OO, and a rubber band 13b that fits on the outer peripheral surface of the shaft portion 13a and has abrasive particles attached to the outer surface thereof. I have.
- polishing band 13 is comprised so that the rotational peripheral speed may become faster than the conveyance speed of the glass ribbon G (As a structure with the rotational peripheral speed of the grinding
- the band 13b is transported by scratching the end portion Ga of the glass ribbon G while the polishing band 13 rotates in a direction to draw the glass ribbon G in the transport direction B.
- the initial crack group CG can be formed in the end portion Ga without applying a force against the direction B to the glass ribbon G. Therefore, it is possible to prevent an excessive force from being applied to the end Ga, and to avoid the occurrence of a situation in which the glass ribbon G is cracked as much as possible.
- the towing table is used as the towing means.
- the present invention is not limited to this.
- the towing means may be configured as shown in FIGS. 11a and 11b. it can.
- components having the same function or shape as those of the initial crack forming apparatus according to the above-described embodiments are denoted by the same reference numerals, and redundant description is omitted. .
- an air injector 14 that injects air V toward the glass ribbon G may be used as the scooping means.
- the air injector 14 is installed on the upstream side of the initial crack formation region S, and is configured to inject air V from directly above the surface of the glass ribbon G.
- the air V ejected from the air ejector 14 is ejected to a region wider than the width of the glass ribbon G, and soot generated on the glass ribbon G is pressed and removed by the wind pressure.
- the air injector 14 may be configured to inject the air V from an angle inclined with respect to the surface of the glass ribbon G.
- the air injector 14 may be installed at an arbitrary position as long as the air V is jetted toward the upstream side of the initial crack formation region S on the conveyance path of the glass ribbon G. Furthermore, you may install the air injector 14 so that the wrinkle of only the peripheral part of the initial stage crack formation area S may be removed. In this case, means for detecting wrinkles can be used as appropriate.
- a roll brush 15 that presses while rotating the glass ribbon G may be used as the scraping means.
- the roll brush 15 is installed on the upstream side of the initial crack formation region S, and the axial length thereof is longer than the width of the glass ribbon G.
- the roll brush 15 is configured to rotate in a direction (R direction shown in the drawing) in which the glass ribbon G is drawn in the transport direction B, similarly to the flap wheel 4. Then, the wrinkles generated on the glass ribbon G are removed by pressing while rotating.
- an initial point that is a starting point for cutting (separating) the thick-walled ears formed at both ends in the width direction of the glass ribbon from the product part used as a product by laser cleaving has been described as an example.
- the present invention is not limited to such an embodiment.
- the present invention can also be applied when forming an initial crack group that is the starting point of cutting.
- a conveyance means which conveys a glass ribbon (plate glass) it is good also as a structure which uses a resin-made stationary stage other than a belt conveyor.
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Abstract
Description
2 皴取台
3 ベルトコンベア
4 フラップホイール
4a 軸部
4b 研磨布
5 吸引器
6 吸引器
9 初期クラック形成部材
14 エアー噴射器
15 ロールブラシ
O 回転軸心
OO 回転軸心
A フラップホイール(研磨バンド)の回転方向
B ガラスリボンの搬送方向
G ガラスリボン(板ガラス)
Ga 端部
C 初期クラック
CG 初期クラック群
K ガラス粉
S 初期クラック形成領域
Claims (13)
- 搬送手段により搬送される板ガラスの搬送方向前方側の端部を傷付けることで、該端部における搬送方向と直交する幅方向に、複数の初期クラックが集合した初期クラック群を形成する初期クラック形成装置であって、
前記板ガラスを搬送方向に引き込む向きに回転しながら前記端部を傷付ける回転加傷部を有し、
該回転加傷部の回転周速度が、前記板ガラスの搬送速度よりも速いことを特徴とする初期クラック形成装置。 - 前記回転加傷部は、前記板ガラスの面方向に沿って延びた回転軸心を中心として回転する軸部と、該軸部から放射状に延びると共に可撓性を有するシート状の加傷部材とを備えることを特徴とする請求項1に記載の初期クラック形成装置。
- 前記回転加傷部が、前記加傷部材と前記搬送手段とが接触する位置に存し、且つ前記板ガラスと非接触の状態で回転する際に、前記加傷部材から前記搬送手段に負荷される押付け力をF[N]、前記加傷部材と前記搬送手段とが接触する接触部の前記回転軸心に沿う方向の長さをW[mm]としたとき、P=(F/W)[N/mm]の値が、0.02<P<0.15を満たすように回転する前記回転加傷部で、前記端部を傷付けるように構成したことを特徴とする請求項2に記載の初期クラック形成装置。
- 前記回転加傷部を基準とした前記板ガラスの搬送方向前方に、前記回転加傷部が前記端部を傷付ける際に前記板ガラスから発生したガラス粉を吸引する第一の吸引手段を備えることを特徴とする請求項1~3のいずれかに記載の初期クラック形成装置。
- 前記回転加傷部を上方から覆うと共に、前記回転加傷部が前記端部を傷付ける際に前記板ガラスから発生したガラス粉を吸引する第二の吸引手段を備えることを特徴とする請求項1~4のいずれかに記載の初期クラックの形成装置。
- 搬送手段により搬送される板ガラスの搬送方向前方側の端部を傷付けることで、該端部における搬送方向と直交する幅方向に、複数の初期クラックが集合した初期クラック群を形成する初期クラック形成装置であって、
前記板ガラスの搬送方向に倣って移動しながら前記端部を傷付ける初期クラック形成部を有し、
該初期クラック形成部の移動速度が、前記板ガラスの搬送速度と略同一であることを特徴とする初期クラック形成装置。 - 前記初期クラック形成部は、前記板ガラスを搬送方向に引き込む向きに回転しながら前記端部を傷付ける回転加傷部であると共に、該回転加傷部の回転周速度が、前記板ガラスの搬送速度と略同一であることを特徴とする請求項6に記載の初期クラック形成装置。
- 前記回転加傷部は、前記板ガラスの面方向に沿って延びた回転軸心を中心として回転する軸部と、該軸部から放射状に延びると共に可撓性を有するシート状の加傷部材とを備えることを特徴とする請求項7に記載の初期クラック形成装置。
- 前記回転加傷部が、前記加傷部材と前記搬送手段とが接触する位置に存し、且つ前記板ガラスと非接触の状態で回転する際に、前記加傷部材から前記搬送手段に負荷される押付け力をF[N]、前記加傷部材と前記搬送手段とが接触する接触部の前記回転軸心に沿う方向の長さをW[mm]としたとき、P=(F/W)[N/mm]の値が、0.5<P<3.0を満たすように回転する前記回転加傷部で、前記端部を傷付けるように構成したことを特徴とする請求項8に記載の初期クラック形成装置。
- 前記初期クラック形成部が、前記端部のうち、前記板ガラスのエッジ部を除外した部位を傷付けるように構成したことを特徴とする請求項6~9のいずれかに記載の初期クラック形成装置。
- 前記板ガラスの搬送経路において、前記初期クラック群を形成する初期クラック形成領域よりも上流側で、前記端部に発生した皺を取る皺取手段を備えることを特徴とする請求項1~10のいずれかに記載の初期クラック形成装置。
- 搬送手段により搬送される板ガラスの搬送方向前方側の端部を傷付けることで、該端部における搬送方向と直交する幅方向に、複数の初期クラックが集合した初期クラック群を形成する初期クラック形成方法であって、
前記板ガラスを搬送方向に引き込む向きに回転する回転加傷具により、前記端部を傷付けると共に、
前記回転加傷具の回転周速度を、前記板ガラスの搬送速度よりも速くしたことを特徴とする初期クラック形成方法。 - 搬送手段により搬送される板ガラスの搬送方向前方側の端部を傷付けることで、該端部における搬送方向と直交する幅方向に、複数の初期クラックが集合した初期クラック群を形成する初期クラック形成方法であって、
前記板ガラスの搬送方向に倣って移動する初期クラック形成具により、前記端部を傷付けると共に、
前記初期クラック形成具の移動速度を、前記板ガラスの搬送速度と略同一としたことを特徴とする初期クラック形成方法。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13852825.2A EP2918558B1 (en) | 2012-11-09 | 2013-11-01 | Initial crack formation method |
| KR1020147035336A KR102073668B1 (ko) | 2012-11-09 | 2013-11-01 | 초기 크랙 형성 장치, 및 형성 방법 |
| CN201380051332.6A CN104684856B (zh) | 2012-11-09 | 2013-11-01 | 初始裂纹形成装置以及形成方法 |
| JP2013550684A JP6108175B2 (ja) | 2012-11-09 | 2013-11-01 | 初期クラック形成装置、及び形成方法 |
| US14/440,916 US20150299021A1 (en) | 2012-11-09 | 2013-11-01 | Initial crack formation device, and formation method |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2012-247230 | 2012-11-09 | ||
| JP2012247230 | 2012-11-09 |
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| WO2014073472A1 true WO2014073472A1 (ja) | 2014-05-15 |
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| PCT/JP2013/079680 Ceased WO2014073472A1 (ja) | 2012-11-09 | 2013-11-01 | 初期クラック形成装置、及び形成方法 |
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| Country | Link |
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| US (1) | US20150299021A1 (ja) |
| EP (1) | EP2918558B1 (ja) |
| JP (1) | JP6108175B2 (ja) |
| KR (1) | KR102073668B1 (ja) |
| CN (1) | CN104684856B (ja) |
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2013
- 2013-11-01 US US14/440,916 patent/US20150299021A1/en not_active Abandoned
- 2013-11-01 JP JP2013550684A patent/JP6108175B2/ja active Active
- 2013-11-01 EP EP13852825.2A patent/EP2918558B1/en active Active
- 2013-11-01 CN CN201380051332.6A patent/CN104684856B/zh active Active
- 2013-11-01 KR KR1020147035336A patent/KR102073668B1/ko active Active
- 2013-11-01 WO PCT/JP2013/079680 patent/WO2014073472A1/ja not_active Ceased
- 2013-11-08 TW TW102140597A patent/TWI594962B/zh active
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016073680A1 (en) * | 2014-11-07 | 2016-05-12 | Corning Incorporated | Mechanically forming crack initiation defects in thin glass substrates using an abrasive surface |
| CN107108323A (zh) * | 2014-11-07 | 2017-08-29 | 康宁股份有限公司 | 使用研磨表面在薄玻璃基材中机械形成裂纹引发缺陷 |
| JP2017538650A (ja) * | 2014-11-07 | 2017-12-28 | コーニング インコーポレイテッド | 研磨面を用いた薄型ガラス基板におけるクラック開始欠陥の機械的形成 |
| US10301211B2 (en) | 2014-11-07 | 2019-05-28 | Corning Incorporated | Mechanically forming crack initiation defects in thin glass substrates using an abrasive surface |
| CN107108323B (zh) * | 2014-11-07 | 2019-12-31 | 康宁股份有限公司 | 使用研磨表面在薄玻璃基材中机械形成裂纹引发缺陷 |
| JP2016098153A (ja) * | 2014-11-25 | 2016-05-30 | 三星ダイヤモンド工業株式会社 | 脆性基板の分断方法 |
| CN106275568A (zh) * | 2015-06-25 | 2017-01-04 | 旭硝子株式会社 | 带吸附层的基板的包装方法和带吸附层的基板的包装装置 |
| JP2017007718A (ja) * | 2015-06-25 | 2017-01-12 | 旭硝子株式会社 | 吸着層付き基板の梱包方法及び吸着層付き基板の梱包装置 |
| WO2019102783A1 (ja) * | 2017-11-27 | 2019-05-31 | 日本電気硝子株式会社 | ガラスロールの製造方法 |
| JP2019094240A (ja) * | 2017-11-27 | 2019-06-20 | 日本電気硝子株式会社 | ガラスロールの製造方法 |
| JP2023511627A (ja) * | 2020-01-27 | 2023-03-20 | コーニング インコーポレイテッド | インライン工程でガラス基板のエッジトリミングを行うための方法および装置 |
| JP7737207B2 (ja) | 2020-01-27 | 2025-09-10 | コーニング インコーポレイテッド | インライン工程でガラス基板のエッジトリミングを行うための方法および装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104684856B (zh) | 2017-07-07 |
| US20150299021A1 (en) | 2015-10-22 |
| EP2918558A1 (en) | 2015-09-16 |
| TW201429899A (zh) | 2014-08-01 |
| CN104684856A (zh) | 2015-06-03 |
| KR20150084655A (ko) | 2015-07-22 |
| TWI594962B (zh) | 2017-08-11 |
| EP2918558A4 (en) | 2016-09-28 |
| KR102073668B1 (ko) | 2020-02-05 |
| JP6108175B2 (ja) | 2017-04-05 |
| EP2918558B1 (en) | 2018-02-21 |
| JPWO2014073472A1 (ja) | 2016-09-08 |
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