WO2016060386A1 - 유리의 면취 방법 - Google Patents

유리의 면취 방법 Download PDF

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Publication number
WO2016060386A1
WO2016060386A1 PCT/KR2015/009949 KR2015009949W WO2016060386A1 WO 2016060386 A1 WO2016060386 A1 WO 2016060386A1 KR 2015009949 W KR2015009949 W KR 2015009949W WO 2016060386 A1 WO2016060386 A1 WO 2016060386A1
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WO
WIPO (PCT)
Prior art keywords
glass
heating element
chamfering
equation
hardness
Prior art date
Application number
PCT/KR2015/009949
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English (en)
French (fr)
Korean (ko)
Inventor
손동진
김동환
김종민
Original Assignee
동우화인켐 주식회사
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Application filed by 동우화인켐 주식회사 filed Critical 동우화인켐 주식회사
Publication of WO2016060386A1 publication Critical patent/WO2016060386A1/ko

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/10—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of plate glass
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
    • C03C25/002—Thermal treatment

Definitions

  • the present invention relates to a chamfering method of glass, and more particularly to a chamfering method of glass that can improve the chamfering process rate by preventing wear of the heating element.
  • Glass products are treated as essential components in a wide range of technologies and industries, such as monitors, cameras, VTRs, mobile phones, video and optical equipment, automobiles, transportation equipment, various tableware, and construction facilities. According to the present invention, glass having various physical properties is manufactured and used.
  • a touch screen is a display and input device installed on a monitor for a terminal to perform a specific command to a computer by inputting various data such as simple contact or drawing a character or a picture by using an auxiliary input means such as a finger or a pen.
  • Such touch screens are increasingly important as a key component for various digital devices that transmit or exchange information to one or both of mobile communication devices such as smartphones, computers, cameras, certificates such as certificates, and industrial equipment. The range is expanding rapidly.
  • the upper transparent protective layer directly contacting the user among the components constituting the touch screen is mainly a plastic organic material such as polyester or acrylic, and the material is deformed due to continuous and repeated use and contact due to its low heat resistance and low mechanical strength. There is a limit in durability, such as being scratched or scratched. Therefore, the upper transparent protective layer of the touch screen is gradually replaced by the tempered thin glass which is excellent in heat resistance, mechanical strength and hardness from the conventional transparent plastic. In addition to the use of tempered thin glass as a transparent protective window of the LCD or OLED monitor in addition to the touch screen, its use area is gradually expanding.
  • Tempered glass is compressed due to the large compressive stress present on the surface when it is cut, and it breaks out of chaotic debris instead of the intended shape, or even if the cut is made in the intended shape. Since the stress disappears and the strength decreases, it is difficult to cut to a desired size or shape once it is strengthened regardless of the composition of the glass.
  • the cutting method of tempered glass requires very precise and stringent conditions as compared with the conventional cutting method of glass.
  • the method introduced as the cutting method of such tempered glass is as follows.
  • the diamond or carbide notching wheels are pulled across the glass surface so that the scale is mechanically inscribed on the glass plate, which is then cut by bending the glass plate along the scale to create a cutting edge.
  • mechanical cutting will produce lateral cracks of about 100 to 150 ⁇ m deep, which cracks arise from the cutting line of the eyewheel. Since the lateral cracks lower the strength of the window substrate, the cutouts of the window substrate must be polished and removed.
  • the method expands the glass surface by moving the laser along a predetermined path on the glass surface through a check on the edge of the window substrate, and along the path of the laser, by pulling the surface along with the cooler moving behind it.
  • the window substrate is cut by thermally propagating the cracks.
  • Chamfering process is generally performed by rotating the polishing wheel for the processing of the cut, that is, chamfering. Through the chamfering process, the smoothness of the cut portion is improved and the strength is increased. However, it was difficult to provide a window substrate having excellent strength in the conventional chamfering process.
  • WO 2005-044512 discloses a method for removing sharp edges by grinding and / or polishing edges of a cut glass substrate, but this method of holding, processing and transporting glass substrates has several disadvantages.
  • generated particles and chips may enter between the belt and the glass substrate and seriously damage the surface of the glass substrate. Such damage can often cause a series of processing steps to be interrupted, resulting in poor processing rates.
  • Korean Laid-Open Patent No. 2012-002573 discloses a method of chamfering using a high temperature heating element, which has a problem in that the heating element used is easily worn and a continuous chamfering process is difficult.
  • An object of the present invention is to provide an economical chamfering method of glass by preventing the wear of the heating element to improve the chamfering process rate.
  • another object of the present invention is to provide a chamfering method of glass that can exhibit high strength by preventing fine cracks on the glass side.
  • heating element is at least one selected from the group consisting of molybdenum silicide, iridium, rhodium and platinum rhodium alloy, chamfering method of glass.
  • the glass has a Vickers hardness of 200 to 1,200 kgf / mm2, chamfering method of the glass.
  • the tempered glass has a depth of 10 to 200 ⁇ m, the chamfering method of the glass.
  • the present invention by using the heating element having a specific range of Vickers hardness, it is possible to prevent the wear of the heating element to improve the chamfering process rate and perform the chamfering process economically.
  • the present invention can effectively remove the fine cracks generated on the side, and have a high strength.
  • FIG. 1 is a view schematically showing a chamfering method according to the present invention.
  • Figure 3 is a schematic cross-sectional view (a) and front view (b) of the side of the chamfered glass according to the present invention.
  • FIG. 4 is a view schematically showing an embodiment of a chamfering method according to the present invention.
  • FIG. 5 is a view schematically showing another embodiment of the chamfering method according to the present invention.
  • the present invention is a method of chamfering the glass chamfered after contacting the heating element having a temperature of 1,200 to 1,700 °C to the side edge of the glass, the heating element satisfies the equation 1, to prevent wear of the heating element to improve the chamfering process rate It relates to a method of chamfering a tempered glass that can exhibit an economical and uniform surface and excellent strength.
  • the heating element 10 contacts the edge of the glass substrate 11 to cut the edge portion of the glass substrate 11 by thermal stress.
  • This is a method of chamfering the substrate 11.
  • thermal stress is generated in the corner portion where the heating element 10 is in contact, and thus a predetermined depth from the contact portion of the heating element 10. The part up to will fall off. Therefore, when the heating element 10 moves in contact with the edge of the glass substrate 11 (in the direction of the arrow in FIG. 1), the edge of the glass substrate 11 may be chamfered.
  • the heating element satisfies Equation 1 below.
  • the heating element is out of the range of Equation 1, the wear of the heating element is significantly increased, the continuous chamfering process is difficult and the chamfering process rate is lowered.
  • the heating element satisfies Equation 1, it is possible to prevent wear of the heating element, thereby improving the chamfering process rate.
  • Figure 2 shows the wear constant according to the Vickers hardness ratio (Pa / Pw) of the glass to the Vickers hardness of the heating element according to the manufacturing example described later.
  • the wear constant of the y-axis which indicates the wear rate of the heating element, changes rapidly when the ratio (Pa / Pw) of the Vickers hardness of the heating element to the Vickers hardness of the glass exceeds 2.00. Therefore, when the Vickers hardness of the heating element satisfies Equation 1 of 2.00 times or less of the Vickers hardness of the glass, wear of the heating element may be prevented, thereby improving the chamfering process rate.
  • the heating element satisfies the following equation (2).
  • the chamfering method according to the present invention may be performed by contacting the side edge of the glass with a heating element having a temperature of 1,200 to 1,700 °C in order to satisfy the equation (1), to achieve the effect of the present invention.
  • a heating element having the temperature range of the present invention is in contact with the side edge of the glass, the thermal stress is generated in the corner portion of the glass is separated from the heating element contact portion to a predetermined depth in the form of a strip.
  • the chamfering method according to the present invention it is possible to effectively remove the fine cracks generated on the side and to improve the strength of the glass.
  • chamfering when the temperature of the heating element is less than 1,200 ° C., chamfering may not be performed, and when the temperature of the heating element is more than 1,700 ° C., the tempered glass may be melted.
  • the total amount of heat supplied to the glass is not particularly limited as long as it can generate heat stress required to cut the edge portion of the glass substrate, but specific examples may satisfy Equation 3 below. .
  • the total amount of heat (Q) supplied by the heating element to the glass may be controlled by the thermal conductivity of the glass, the temperature of the heating element, the temperature of the glass, the moving speed of the heating element, and the distance the heating element moves in the glass direction. If less than 10 Kcal, the chamfering does not occur due to the lack of the thermal stress required to cut the edge of the glass substrate, and if the total supply heat is more than 200 Kcal, the thermal stress is excessive and deformation may occur and the glass may be broken.
  • the moving speed may be 0.5 to 5 m / min. If the moving speed is less than 0.5 m / min may cause damage to the protective layer, increase the amount of cutting and melting of the glass, and if it exceeds 5 m / min, the chamfered surface is rough and the chamfered shape may be uneven.
  • the material that can be used as a heating element is not particularly limited as long as it can transfer the temperature of the heating element described above without deformation and satisfy the equation (1).
  • Specific examples include iridium, rhodium and platinum rhodium alloys, and these may be used alone or in combination of two or more thereof.
  • the type of glass substrate to be chamfered to which the chamfering method of the present invention can be applied is not particularly limited, and examples thereof include conventional glass, tempered glass, and the like.
  • the tempered glass is not particularly limited, but in a preferred embodiment, the depth of the strengthening layer may be 10 ⁇ m to 200 ⁇ m, in another embodiment, 40 ⁇ m to 200 ⁇ m, and in another embodiment, 120 ⁇ m to 200 ⁇ m.
  • the tempered glass to which the chamfering method of the present invention may be applied may have a Young's modulus of 60 to 90 GPa, preferably 65 to 85 GPa.
  • Figure 3 is a schematic cross-sectional view (a) and the side of the chamfered glass Front view (b) is shown.
  • the method of processing the inclined upper and lower corners of the side surface of the glass to be inclined in a detailed order, the number of times, and the inclination angle of contacting the heating elements if the upper and lower corners are inclined in the final form There is no special limitation.
  • the heating element may be carried out by contacting the heating element to the upper and lower corners of the glass.
  • the inclined surface may be formed by contacting the heating element with the upper edge portion 1 and the lower edge portion 2 of the side surface of the glass.
  • the heating element may be contacted with the upper edge portion and the lower edge portion of the side of the glass and then contacted with the heating element in a parallel direction of the side of the glass.
  • Figure 5 schematically shows the chamfering method of this embodiment. Referring to Figure 5, first to form a slope to a predetermined portion (1) by contacting the heating element in the upper corner portion of the side of the glass. Next, the heating element is brought into contact with the upper edge portion of the side surface of the glass to form an inclined surface up to a predetermined portion (2). Subsequently, the final cross-sectional shape can be obtained by contacting the heating element in the parallel direction of the side surfaces of the glass to remove the glass to the required portion 3.
  • the order of the chamfering process can be changed, and thus, the chamfering process may be performed in a different order from that shown in FIG. 5.
  • the chamfering process may be performed in the order of 2, 1 and 3, or may be performed in the order of 3, 2, and 1, but is not limited thereto.
  • the reinforcement process of the surface of the side surface of glass can be further performed as needed. This reinforcement process allows for a more uniform surface and excellent strength.
  • the reinforcing process according to the present invention includes a method of polishing the side of the glass with a polishing wheel, or etching the side of the glass with an etchant containing hydrofluoric acid.
  • a method of polishing with a polishing wheel is a method of polishing the side of the glass more evenly by contacting the side of the glass with the rotating polishing wheel after the inclined surface processing by the heating element is completed. As a result, fine cracks or the like present on the surface are polished to reinforce the side surface of the glass.
  • the polishing wheel may use a wheel made of abrasive particles such as cerium oxide. It is preferable that the size of abrasive grain is 5 micrometers or less from the viewpoint which fully demonstrates the side reinforcement effect of glass. The smaller the size of the abrasive particles, the higher the polishing accuracy is. Therefore, the lower limit is not particularly limited, but considering the process time or the like, about 0.01 ⁇ m can be used.
  • the rotation speed of the polishing wheel is not particularly limited and may be appropriately selected so that the side of the glass is sufficiently polished to obtain a desired level of strength, for example, it may be 1,000 to 10,000 rpm.
  • the method of etching using hydrofluoric acid is a method of applying an etching solution containing hydrofluoric acid to the side of the glass to etch the surface portion of the side of the glass.
  • an etchant containing hydrofluoric acid the side of the glass exhibits an embossed pattern and is etched to reinforce the surface.
  • the etchant including hydrofluoric acid is an aqueous hydrofluoric acid solution, and may further include components known in the art as free etching components such as hydrochloric acid, nitric acid, and sulfuric acid, in addition to hydrofluoric acid.
  • the time for etching the side of the glass with the etchant including hydrofluoric acid is not particularly limited, but for example, etching between 30 seconds and 10 minutes may increase the strength without excessively etching the side of the glass.
  • the temperature of the etching liquid containing hydrofluoric acid is not specifically limited, For example, it is preferable that it is 20-50 degreeC. If the temperature is lower than 20 °C process time is long and the etching may proceed inadequately, if the temperature is higher than 50 °C process time is short but the etching may proceed unevenly.
  • An etchant including hydrofluoric acid may be applied to the side of the glass in a manner known in the art, such as sprayed on the side of the glass or immersing the side of the glass in the etchant.
  • a relative wear coefficient of Pa / Pw which is the ratio of the Vickers hardness of the heating element to the Vickers hardness of the glass, was measured while changing the hardness of the heating element, and the results are shown in Tables 1 and 2 below. Shown in In Table 1, Pa is the Vickers hardness of the heating element, and Pw is the Vickers hardness of the tempered glass.
  • the chamfering process was performed by contacting the heating element to the side edge of the cut tempered glass of Preparation Example 1 under the conditions shown in Table 2.
  • Table 2 Pa is the Vickers hardness of the heating element, and Pw is the Vickers hardness of the tempered glass.
  • Table 3 shows the degree of wear and measured elongation of the heating elements of the Examples and Comparative Examples. Elongation was judged by the average value of 50 or more sheets of tempered glass.
  • the chamfering process of the said Example and the comparative example was performed by making into less than 5 sheets, less than 5 sheets, less than 10 sheets, and more than 10 sheets of cut tempered glass.
  • the degree of wear of the heating element was evaluated according to the number of tempered glass, and the results are shown in Table 3. When the heating element wear depth exceeds 50 mm, microcracks occur in the tempered glass during processing, and the phenomenon that the tempered glass after processing is broken occurs.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Surface Treatment Of Glass (AREA)
PCT/KR2015/009949 2014-10-17 2015-09-22 유리의 면취 방법 WO2016060386A1 (ko)

Applications Claiming Priority (2)

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KR1020140140913A KR102219327B1 (ko) 2014-10-17 2014-10-17 유리의 면취 방법
KR10-2014-0140913 2014-10-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022212684A1 (en) * 2021-04-01 2022-10-06 Corning Incorporated Heat chamfering apparatus and method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101867039B1 (ko) * 2017-02-02 2018-06-14 에이펫(주) 면취 장치 및 면취 방법
KR102589337B1 (ko) * 2021-10-01 2023-10-16 (주)하나기술 초박막 유리 절단 장치 및 이를 이용한 절단 방법

Citations (6)

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Publication number Priority date Publication date Assignee Title
KR19990083449A (ko) * 1998-04-24 1999-11-25 이데이 노부유끼 유리스크라이버
JP2001294437A (ja) * 2000-04-13 2001-10-23 Sharp Corp 液晶表示装置のガラス基板の面取り方法およびその方法に用いる加熱器
JP2007145681A (ja) * 2005-11-30 2007-06-14 Optrex Corp 切断刃および切断方法
KR20110131563A (ko) * 2010-05-31 2011-12-07 주)제원 Csc 유리박판의 모서리 연삭 방법 및 장치
KR20130081541A (ko) * 2012-01-09 2013-07-17 주식회사 라미넥스 유리 모서리 가공 방법 및 장치
KR20140018227A (ko) * 2011-02-28 2014-02-12 아사히 가라스 가부시키가이샤 강화용 유리판

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7125319B2 (en) 2003-10-27 2006-10-24 Corning Incorporated Apparatus and method for grinding and/or polishing an edge of a glass sheet
EP2412507A4 (en) 2009-03-27 2012-11-07 Konica Minolta Opto Inc ART RESIN ARTICLES FOR AN OPTICAL ELEMENT, PROCESS FOR PREPARING AN ART RESIN ARTICLE FOR AN OPTICAL ELEMENT, DEVICE FOR PRODUCING AN ART RESIN ARTICLE FOR AN OPTICAL ELEMENT AND OPTICAL SCANNING DEVICE

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990083449A (ko) * 1998-04-24 1999-11-25 이데이 노부유끼 유리스크라이버
JP2001294437A (ja) * 2000-04-13 2001-10-23 Sharp Corp 液晶表示装置のガラス基板の面取り方法およびその方法に用いる加熱器
JP2007145681A (ja) * 2005-11-30 2007-06-14 Optrex Corp 切断刃および切断方法
KR20110131563A (ko) * 2010-05-31 2011-12-07 주)제원 Csc 유리박판의 모서리 연삭 방법 및 장치
KR20140018227A (ko) * 2011-02-28 2014-02-12 아사히 가라스 가부시키가이샤 강화용 유리판
KR20130081541A (ko) * 2012-01-09 2013-07-17 주식회사 라미넥스 유리 모서리 가공 방법 및 장치

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022212684A1 (en) * 2021-04-01 2022-10-06 Corning Incorporated Heat chamfering apparatus and method

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Publication number Publication date
KR20160045419A (ko) 2016-04-27
TW201620668A (zh) 2016-06-16
KR102219327B1 (ko) 2021-02-22

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