Method for manufacturing glass article

Abstract

To provide a method for manufacturing a glass article, capable of, after forming a scribe line in a glass plate mounted on an underlay, easily removing the glass plate from the underlay.SOLUTION: A method for manufacturing a glass article comprises: a preparation step of preparing a mounting table 12 including a surface plate 13 and an underlay 14 arranged to be superposed on the surface plate 13; a static elimination step of statically eliminating the underlay 14 of the mounting table 12; a mounting step of mounting a glass plate on the underlay 14 of the mounting table 12; and a scribe line formation step of forming a scribe line in the glass plate using a tool.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a method for producing a glass article. [Background technology]

[0002] As described in Patent Document 1, a method is known for cutting a glass sheet in which a tool is used to form a scribe line on the glass sheet and then the glass sheet is divided along the scribe line. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-051329 A Summary of the Invention [Problem to be solved by the invention]

[0004] As described above, when forming a scribe line on a glass plate using a tool, for example, the glass plate can be placed on a mounting table including a surface plate and an underlay placed on the surface plate to stably form the scribe line. The glass plate placed on the underlay of the mounting table is separated from the underlay after the scribe line is formed. At this time, the underlay and the glass plate may stick together due to the static electricity of the underlay, making it difficult to peel the glass plate from the underlay.

[0005] An object of the present invention is to provide a method for manufacturing a glass article, which makes it possible to easily peel the glass plate from the underlay after a scribe line is formed on the glass plate placed on the underlay. [Means for solving the problem]

[0006] Each aspect of a method for producing a glass article that solves the above problems will be described. The method for manufacturing a glass article of aspect 1 includes a preparation step of preparing a mounting table having a base plate and a backing placed on top of the base plate, a mounting step of placing a glass plate on the backing of the mounting table, and a scribe line forming step of forming a scribe line on the glass plate using a tool, and further includes a discharge step of discharging electricity from the backing of the mounting table prior to the mounting step.

[0007] According to this method, the charge on the underlay can be suppressed by the charge removal step, and thus it is possible to prevent the glass sheet placed on the underlay from sticking to the underlay due to the charge on the underlay.

[0008] In the method for manufacturing a glass article of aspect 2, in aspect 1, in the de-electrification step, the underlay of the mounting table is de-electrified by contacting a de-electrification member with the underlay, the de-electrification member has a roller part that is capable of rolling while in contact with the underlay, the surface resistivity of the outer circumferential surface of the roller part is 110 Ω / □ or less, the outer circumferential surface of the roller part is adhesive, and in the de-electrification step, foreign matter on the underlay is removed by adhering it to the outer circumferential surface of the roller part.

[0009] According to this method, since the outer peripheral surface of the roller part of the static elimination member has the above-mentioned surface resistivity, static elimination of the underlay can be performed more efficiently in the static elimination process, and it becomes easier to suppress the static charge of the underlay. Also, in the static elimination process, foreign matter on the underlay is removed by adhering it to the outer peripheral surface of the adhesive roller part. This makes it possible to suppress damage to the glass plate caused by foreign matter on the underlay in the scribe line formation process.

[0010] In the method for producing a glass article according to aspect 3, the roller part of the static eliminator may have an outer peripheral layer made of butyl rubber as a base material in aspect 2. For example, such an outer peripheral layer can impart static elimination performance and adhesive performance to the outer peripheral surface of the roller part.

[0011] In the method for producing a glass article according to aspect 4, in aspect 2 or 3, the static elimination step may be performed by contacting the outer circumferential surface of the roller part of the static eliminator over the entire area of ​​use where the glass plate overlaps the underlay. This method makes it possible to further suppress static electricity buildup on the underlay.

[0012] In the method for producing a glass article according to aspect 5, in any one of aspects 1 to 4, the underlay of the mounting table may be made of a synthetic resin sheet, the arithmetic mean roughness Ra of the upper surface of the synthetic resin sheet may be 3.75 μm or less, and the thickness of the synthetic resin sheet may be 30 μm or more. According to this method, the quality of the scribe line formed on the glass plate is improved, thereby enabling the glass plate to be stably divided.

[0013] In the method for producing a glass article of aspect 6, in aspect 5, the Young's modulus of the synthetic resin sheet may be 5000 MPa or less, and the Rockwell hardness defined in ASTM D785 may be R130 or less. According to this method, the quality of the scribe line formed in the glass plate is improved, thereby making it possible to stably divide the glass plate.

[0014] In the method for producing a glass article of aspect 7, in aspect 5 or aspect 6, the synthetic resin sheet may include at least one resin layer selected from polyethylene, polyethylene terephthalate, polypropylene, and polycarbonate.

[0015] In the method for producing a glass article according to an eighth aspect, in any one of the fifth to seventh aspects, the surface resistivity of the synthetic resin sheet is 5.0×10 10 It may be Ω / □ or less. According to this method, it is possible to further suppress the charging of the underlay.

[0016] In the method for manufacturing a glass article according to aspect 9, in any one of aspects 1 to 8, the mounting table has a suction flow path for sucking the glass plate placed on the underlay, the suction flow path has an opening opening on the upper surface of the base plate and a through hole communicating with the opening and penetrating the underlay so as to open on both main surfaces of the underlay, which are the front and back surfaces of the underlay, and the manufacturing method further includes a fixing step of fixing the glass plate on the underlay by sucking the glass plate using the suction flow path after the mounting step, and the scribe line forming step may be performed after the fixing step. According to this method, for example, it is possible to further improve the accuracy of the position of the scribe line.

[0017] In the method for producing a glass article of Aspect 10, the diameter of the through hole of the underlay may be the same as or smaller than the diameter of the opening of the platen in Aspect 9. This method makes it possible, for example, to ensure a larger contact area between the underlay and the glass plate.

[0018] In the method for producing a glass article of Aspect 11, in any one of Aspects 1 to 10, the glass plate may have a thickness in the range of 0.005 mm or more and 0.5 mm or less. In the method for producing a glass article of Aspect 12, in any one of Aspects 1 to 11, the glass plate may be made of alkali aluminosilicate glass.

[0019] In the method for manufacturing a glass article of Aspect 13, in any one of Aspects 1 to 12, the tool may be a scribing wheel. The method for producing a glass article according to aspect 14 may be any one of aspects 1 to 13, further comprising, after the scribe line forming step, a dividing step of dividing the glass plate along the scribe line. Effect of the Invention

[0020] The present invention exhibits the effect of making it possible to easily peel off the glass plate from the underlay after a scribe line is formed on the glass plate placed on the underlay. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a perspective view illustrating a preparation step in a method for producing a glass article according to an embodiment. [Diagram 2] FIG. 2 is a perspective view illustrating the charge removal process. [Diagram 3] FIG. 3 is a perspective view illustrating the placing step and the fixing step. [Figure 4] FIG. 4 is a perspective view illustrating the scribe line forming step. [Diagram 5] FIG. 5 is a perspective view illustrating the peeling step. [Figure 6] FIG. 6 is a perspective view illustrating the cutting step. [Figure 7] FIG. 7 is a partial cross-sectional view taken along line 7-7 in FIG. [Figure 8] FIG. 8 is a flow diagram illustrating a method for producing a glass article. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, an embodiment of a method for manufacturing a glass article will be described with reference to the drawings. Note that in the drawings, for convenience of explanation, some of the configurations may be exaggerated or simplified. Furthermore, the dimensional ratios of each part may differ from the actual ones.

[0023] <Glass articles> As shown in Fig. 6, the glass article 11 of this embodiment is obtained by dividing a glass plate G1 having a scribe line SL along the scribe line SL. The upper limit of the thickness of the glass plate G1 is, for example, 0.5 mm or less, 0.3 mm or less, 0.2 mm or less, 0.1 mm or less, 0.085 mm or less, 0.060 mm or less, 0.055 mm or less, 0.040 mm or less, or 0.035 mm or less. The lower limit of the thickness of the glass plate G1 is, for example, 0.005 mm or more, 0.01 mm or more. The thickness of the glass plate G1 is, for example, within a range of 0.005 mm or more and 0.5 mm or less.

[0024] The upper limit of the Young's modulus of the glass plate G1 is, for example, 80 GPa or less, preferably 78.0 GPa or less, 76.0 GPa or less, 75.0 GPa or less, 74.0 GPa or less, 73.0 GPa or less, 72.5 GPa or less, 72.0 GPa or less, 71.5 GPa or less, 71.0 GPa or less. The lower limit of the Young's modulus of the glass plate G1 is preferably 65 GPa or more, more preferably 67 GPa or more, 68 GPa or more, 69 GPa or more.

[0025] The planar shape of the glass plate G1 is not particularly limited. The planar shape of the glass plate G1 is, for example, a quadrangle. The scribe lines SL of the glass plate G1 may be linear or curved. The glass plate G1 may have a plurality of scribe lines SL. The plurality of scribe lines SL of the glass plate G1 may be arranged so as to extend parallel to each other, or may be arranged so as to intersect each other.

[0026] Examples of the glass constituting the glass plate G1 include soda glass, soda lime glass, borosilicate glass, aluminosilicate glass, and non-alkali glass. The glass plate G1 may be a glass plate for chemical strengthening. Examples of the glass for chemical strengthening include soda glass and alkali aluminosilicate glass containing an alkali metal oxide as a glass composition. The alkali metal oxide component contained in the alkali aluminosilicate glass as a glass composition is preferably at least one selected from Li2O, Na2O, and K2O. The glass for chemical strengthening is preferably an alkali aluminosilicate glass. The alkali aluminosilicate glass preferably contains, for example, SiO2: 50 to 80%, Al2O3: 5 to 25%, B2O3: 0 to 15%, Li2O: 0 to 20%, Na2O: 1 to 20%, and K2O: 0 to 10% in mass % as a glass composition. The glass composition of the glass article 11 obtained by cutting the glass plate G1 is the same as the glass composition of the glass plate G1.

[0027] <Method of manufacturing glass article> 8, the method for manufacturing the glass article 11 includes a preparation step (step S1), a static elimination step (step S2), and a placement step (step S3). The method for manufacturing the glass article 11 includes a fixing step (step S4) and a scribe line formation step (step S5). The method for manufacturing the glass article 11 includes a peeling step (step S6) and a cutting step (step S7).

[0028] <Preparation process> As shown in Fig. 1 and Fig. 2, in the preparation process of step S1, a mounting table 12 is prepared. The mounting table 12 has a surface plate 13 and an underlay 14 placed on the surface plate 13. The surface plate 13 is made of, for example, metal. The underlay 14 can be made of a non-adhesive sheet material. The underlay 14 can be made of, for example, a synthetic resin sheet.

[0029] The arithmetic mean roughness Ra of the upper surface of the underlay 14 is preferably 3.75 μm or less. When the underlay 14 is made of a synthetic resin sheet, the thickness of the synthetic resin sheet is preferably 30 μm or more. There is no particular upper limit to the thickness of the synthetic resin sheet, but it is, for example, 500 μm or less. The Young's modulus of the synthetic resin sheet is preferably 5000 MPa or less. The Rockwell hardness of the synthetic resin sheet as defined in ASTM D785 is preferably R130 or less.

[0030] The surface resistivity of the synthetic resin sheet is 5.0×10 10 The surface resistivity [Ω / □] is 1 cm 2 The surface resistivity is the surface resistance value per unit area. The surface resistivity can be measured in accordance with JIS C2139-3-2:2018. The synthetic resin sheet may have a coating that suppresses static electricity. The synthetic resin sheet may also contain an antistatic agent such as a surfactant or conductive filler that suppresses static electricity.

[0031] The synthetic resin sheet may be composed of one resin layer or two or more resin layers. The synthetic resin sheet preferably includes at least one resin layer selected from polyethylene, polyethylene terephthalate, polypropylene, and polycarbonate.

[0032] <Static charge removal process and placing process> As shown in FIG. 2, in the charge removal process of step S2, the charge removal member 15 is brought into contact with the underlay 14 of the mounting table 12 to remove charge from the underlay 14. The charge removal member 15 of this embodiment has a roller portion 16 that can roll while in contact with the underlay 14. In more detail, the charge removal member 15 includes a support portion 17 that rotatably supports the roller portion 16, and an operation portion 18 that is connected to the support portion 17. The operation portion 18 is provided so as to extend in a direction intersecting the axial direction of the roller portion 16. The operation portion 18 may be used as a gripping portion that is held by an operator, or may be used as a mounting portion that is mounted on a robot arm. The operation portion 18 may be omitted. In this case, the roller portion 16 that is in contact with the underlay 14 can also be rolled by operating the support portion 17.

[0033] In order to maximize the neutralization performance of the neutralization member 15, the surface resistivity of the outer circumferential surface of the roller portion 16 of the neutralization member 15 is preferably 110 Ω / □ or less. 2 The surface resistivity can be measured in accordance with JIS C2139-3-2:2018.

[0034] The outer peripheral surface of the roller part 16 of the static eliminator 15 is preferably adhesive. In this case, in the static elimination step of step S2, the foreign matter on the underlay 14 can be removed by adhering the foreign matter to the outer peripheral surface of the roller part 16 of the static eliminator 15. The roller part 16 of the static eliminator 15 preferably has an outer peripheral layer whose base material is butyl rubber. Such an outer peripheral layer may contain, for example, an adhesive, a conductive material, or the like.

[0035] As shown in Fig. 3, in the placing process of step S3, the glass sheet G1 is placed on the underlay 14 of the placing table 12. In Fig. 1, a use range 14a, which is the range where the glass sheet G1 overlaps on the underlay 14, is shown by a two-dot chain line. In the static electricity removal process of step S2 of this embodiment, the outer circumferential surface of the roller unit 16 is brought into contact with the use range 14a on the underlay 14. In the static electricity removal process of step S2, it is preferable to bring the outer circumferential surface of the roller unit 16 into contact over the entire use range 14a.

[0036] <Fixed process> As shown in Fig. 7, in the fixing process of step S4, after the placing process of step S3, the glass plate G1 is sucked using the suction flow path FL of the placing table 12, thereby fixing the glass plate G1 on the underlay 14. As shown in Fig. 3 and Fig. 7, a suction device P that sucks gas from within the surface plate 13 is connected to the surface plate 13. The gas from within the surface plate 13 is sucked by the suction device P, thereby fixing the glass plate G1 on the underlay 14.

[0037] More specifically, the suction flow path FL for sucking the glass sheet G1 placed on the underlay 14 has an opening FL1 opening on the upper surface of the base plate 13 and a through hole FL2 penetrating the underlay 14. As shown in Figs. 1 and 7, the through hole FL2 of the underlay 14 penetrates the underlay 14 so as to open on both main surfaces of the underlay 14, which are the front and back surfaces. The through hole FL2 of the underlay 14 communicates with the opening FL1 of the base plate 13. Examples of methods for forming the through hole FL2 in the underlay 14 include a method of piercing the underlay 14 with a needle and a method of irradiating the underlay 14 with laser light. The through hole FL2 of the underlay 14 may be formed before or after the underlay 14 is placed on the base plate 13.

[0038] There is no particular limitation on the size relationship between the diameter D1 of the opening FL1 of the base plate 13 and the diameter D2 of the through hole FL2 of the underlay 14. The diameter D2 of the through hole FL2 of the underlay 14 is preferably the same as or smaller than the diameter D1 of the opening FL1 of the base plate 13, and more preferably smaller than the diameter D1 of the opening FL1. In this case, a larger contact area between the underlay 14 and the glass sheet G1 can be ensured.

[0039] <Scribe line formation process> As shown in Fig. 4, in the scribe line forming process of step S5, a scribe line SL is formed in the glass sheet G1 using a tool T. The scribe line SL is a crack line formed continuously on the intended dividing line in the glass sheet G1. The scribe line SL is formed to a depth that does not penetrate the glass sheet G1 in the thickness direction. The scribe line SL is formed at a position that does not overlap with the opening FL1 of the base plate 13 and the through hole FL2 of the underlay 14 in a plan view.

[0040] The tool T used in the scribe line forming step in step S5 may be a rotatable scribing wheel, a non-rotatable scribing tip, etc. The tool T is preferably a scribing wheel.

[0041] In the scribe line forming process of step S5, the tool T and the glass sheet G1 are moved relative to each other while the tool T is in contact with the glass sheet G1. In the scribe line forming process of step S5 of this embodiment, a scribing wheel is run on the glass sheet G1 to form the scribe line SL.

[0042] <Peeling process> As shown in FIG. 5, in the peeling step of step S6, the glass plate G1 on the underlay 14 of the mounting table 12 is peeled off from the underlay 14. In the peeling step of step S6 of this embodiment, first, the fixing of the glass plate G1 in the fixing step of step S4 is released. Next, the carry-out table 19 on which the glass plate G1 can be placed is disposed adjacent to the mounting table 12. Next, the glass plate G1 is moved horizontally toward the carry-out table 19. As a result, the glass plate G1 is peeled off from the underlay 14, and the glass plate G1 is transferred from the mounting table 12 onto the carry-out table 19. Note that, in the peeling step of step S6, for example, the glass plate G1 can be adsorbed using a suction mechanism and the glass plate G1 is moved above the underlay 14, thereby peeling the glass plate G1 from the underlay 14.

[0043] <Cutting process> As shown in FIG. 6, in the dividing process of step S7, the glass sheet G1 having the scribe line SL is divided along the scribe line SL. In the dividing process of step S7, for example, the glass sheet G1 is bent so that an external force is applied to the scribe line SL. As a result, the scribe line SL advances, and the glass sheet G1 is divided. When applying an external force to the glass sheet G1 having the scribe line SL, it is preferable to bend the glass sheet G1 so that tensile stress is generated on the main surface side having the scribe line SL, among both main surfaces of the glass sheet G1. In addition, in the dividing process, for example, the glass sheet G1 can also be divided by advancing the scribe line SL by utilizing thermal stress generated by a temperature difference of the glass sheet G1.

[0044] <Test Example> Next, a test example will be described. (Test Example 1) In test example 1, a glass article 11 was obtained by performing a preparation process in step S1, a static electricity removal process in step S2, a placement process in step S3, a fixing process in step S4, a scribe line formation process in step S5, a peeling process in step S6, and a cutting process in step S7.

[0045] The glass plate G1 used in Test Example 1 is an alkali aluminosilicate glass having a glass composition, in mass%, of SiO2: 61.5%, Al2O3: 18.0%, B2O3: 0.5%, K2O: 2.0%, Na2O: 14.5%, Li2O: 0.1%, MgO: 3.0%, and SnO2: 0.4%. The thickness of the glass plate G1 is 35 μm, and the planar dimensions are 500 mm × 500 mm.

[0046] The underlay 14 used in Test Example 1 was a synthetic resin sheet (polyethylene terephthalate (PET) sheet, surface resistivity: 1.0×10 17 Ω / □, thickness: 100 μm, arithmetic mean roughness Ra: 0.06 μm).

[0047] The static eliminator 15 used in Test Example 1 has a roller part 16. The roller part 16 of the static eliminator 15 has an outer circumferential layer made of butyl rubber as a base material. The surface resistivity of the outer circumferential surface of the roller part 16 of the static eliminator 15 is 110 Ω / □ or less.

[0048] In the scribe line forming step of step S5, a scribing wheel was used as the tool T. The conditions for running the scribing wheel were a load of 1 N and a running speed of 500 mm / s. The planar dimensions of the glass article 11 were 250 mm×500 mm.

[0049] In the dividing step of step S7, the glass sheet G1 was bent so that tensile stress was generated on the main surface side having the scribe lines SL. In this way, the glass sheet G1 was divided by bending and breaking the glass sheet G1 along the scribe lines SL.

[0050] (Test Examples 2 and 3) In Test Examples 2 and 3, glass articles 11 were obtained in the same manner as in Example 1, except that underlays 14 with different surface resistivities or thicknesses were used as shown in Table 1.

[0051] (Test Example 4) In Test Example 4, an attempt was made to manufacture glass article 11 in the same manner as in Test Example 1, except that the static elimination step in step S2 was omitted.

[0052] (Pass / fail judgement of peeling process) In Test Examples 1 to 4, when the peeling step of step S6 was performed, a pass / fail judgment was made in which the glass plate G1 having the scribe line SL could be peeled off from the underlay 14. The pass / fail judgment of the production of the glass article 11 and the peeling step was performed a total of four times, and the pass rate was calculated. The results are shown in Table 1.

[0053] (Judgment of pass / fail of cutting process) In the test examples 1 to 3, when the dividing step of step S7 was performed, a pass / fail judgment was made in which the glass article 11 was divided without any defects such as chipping. The pass / fail judgment of the manufacturing and dividing steps of the glass article 11 was performed 100 times, and the pass rate was calculated. The results are shown in Table 1.

[0054] [Table 1] The pass rate for the peeling step was 100% in Test Examples 1 to 3. On the other hand, the pass rate for the peeling step was 0% in Test Example 4. The pass rate for the cutting step was 50% or more in Test Examples 1 to 3.

[0055] <Action and Effects> Next, the operation and effects of this embodiment will be described. (1) The manufacturing method of a glass article 11 includes a preparation step S1, a static electricity removal step S2, a placing step S3, and a scribe line forming step S5. In the preparation step S1, a placing table 12 is prepared, which has a base plate 13 and an underlay 14 placed on the base plate 13. In the static electricity removal step S2, the underlay 14 of the placing table 12 is removed from the base plate 14 before the placing step S3. In the placing step S3, a glass sheet G1 is placed on the underlay 14 of the placing table 12. In the scribe line forming step S5, a tool T is used to form a scribe line SL on the glass sheet G1.

[0056] According to this method, the static charge of the underlay 14 can be suppressed by the static charge removal step in step S2. This makes it possible to prevent the glass sheet G1 placed on the underlay 14 from sticking to the underlay 14 due to the static charge of the underlay 14. Therefore, after the scribe line formation step in step S5, it becomes possible to easily peel the glass sheet G1 having the scribe line SL from the underlay 14.

[0057] Therefore, in the peeling process of step S6, it is possible to easily avoid application of excessive force to the glass plate G1 having the scribe line SL, which makes it possible to easily prevent breakage of the glass plate G1 having the scribe line SL in the peeling process of step S6.

[0058] (2) In the static elimination step S2 of the method for manufacturing the glass article 11, the static elimination member 15 is brought into contact with the underlay 14 of the mounting table 12 to eliminate static electricity from the underlay 14. The static elimination member 15 has a roller portion 16 that can roll while in contact with the underlay 14. The surface resistivity of the outer circumferential surface of the roller portion 16 of the static elimination member 15 is preferably 110 Ω / □ or less. In this case, the static elimination of the underlay 14 can be performed more efficiently in the static elimination step S2, so that it is easier to suppress the charging of the underlay 14. In addition, the outer circumferential surface of the roller portion 16 of the static elimination member 15 is preferably adhesive. In this case, in the static elimination step S2, the foreign matter on the underlay 14 is adhered to the outer circumferential surface of the roller portion 16 to remove the foreign matter on the underlay 14. This makes it possible to suppress damage to the glass plate G1 caused by the foreign matter on the underlay 14 in the scribe line formation step S5. The roller portion 16 of such a static eliminator 15 preferably has an outer peripheral layer whose base material is, for example, butyl rubber.

[0059] (3) In the static electricity removing process in step S2, it is preferable to bring the outer circumferential surface of the roller portion 16 of the static electricity removing member 15 into contact with the entire use area 14a where the glass sheet G1 overlaps on the underlay 14. In this case, it is possible to further suppress the charging of the underlay 14. Furthermore, if the outer circumferential surface of the roller portion 16 of the static electricity removing member 15 is adhesive, it is possible to remove foreign matter from the entire area where the glass sheet G1 is placed on the underlay 14. This makes it possible to further suppress damage to the glass sheet G1 caused by foreign matter on the underlay 14 in the scribe line forming process in step S5.

[0060] (4) The underlay 14 of the mounting table 12 may be made of, for example, a synthetic resin sheet. The arithmetic mean roughness Ra of the upper surface of the synthetic resin sheet is preferably 3.75 μm or less. The thickness of the synthetic resin sheet is preferably 30 μm or more. The Young's modulus of the synthetic resin sheet is preferably 5000 MPa or less. The Rockwell hardness of the synthetic resin sheet as defined in ASTM D785 is preferably R130 or less.

[0061] In this case, by improving the quality of the scribe line SL formed on the glass sheet G1, it becomes possible to stably divide the glass sheet G1. Therefore, it becomes possible to improve the quality of the glass article 11 and to increase the yield of the glass article 11.

[0062] (5) The manufacturing method of the glass article 11 further includes a fixing step (step S4) of fixing the glass plate G1 on the underlay 14 after the placing step of step S3. In the fixing step of step S4, the glass plate G1 is sucked using the suction flow path FL of the mounting table 12. In the manufacturing method of the glass article 11, the scribe line forming step of step S5 is performed after the fixing step of step S4. In this case, for example, it is possible to further increase the accuracy of the position of the scribe line SL. Therefore, it is possible to improve the quality of the glass article 11 divided in the dividing step of step S7 and to improve the yield of the glass article 11.

[0063] (6) In the mounting table 12, the diameter D2 of the through hole FL2 of the underlay 14 is preferably equal to or smaller than the diameter D1 of the opening FL1 of the base plate 13. In this case, for example, it is possible to ensure a larger contact area between the underlay 14 and the glass plate G1. Therefore, for example, the glass plate G1 can be suitably protected by the underlay 14.

[0064] (7) The method for producing glass article 11 further includes a dividing step (step S7) of dividing glass sheet G1 along scribe lines SL after scribe line forming step S5. In this case, glass article 11 divided along scribe lines SL can be provided.

[0065] <Example of change> The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other to the extent that no technical contradiction occurs.

[0066] In the method for producing the glass article 11, the fixing step S4 may be omitted. In the manufacturing method of the glass article 11, the peeling step in step S6 may be performed after the dividing step in step S7. That is, the dividing step in step S7 may be a step of dividing the glass plate G1 in a state where it is laminated on the underlay 14.

[0067] The underlay 14 may be made of rubber or elastomer. The underlay 14 may have a laminated structure in which layers of different materials, such as a layer made of rubber, a layer made of synthetic resin, and a layer made of elastomer, are laminated together.

[0068] In the method for manufacturing the glass article 11, the static elimination step in step S2 may use a static elimination member 15 having a brush portion that contacts the underlay 14. In this case, it is also possible to remove foreign matter on the underlay 14 by utilizing the brush portion of the static elimination member 15.

[0069] In the manufacturing method of the glass article 11, in the static elimination step of step S2, the static elimination member 15 is brought into contact with the inside of the use range 14a of the underlay 14, but static elimination of the underlay 14 can also be performed by bringing the static elimination member 15 into contact with the outside of the use range 14a of the underlay 14. That is, in the static elimination step of step S2, the step of removing foreign matter on the underlay using the static elimination member 15 can be omitted.

[0070] The manufacturing method of glass article 11 can be changed to a method in which a laminate of glass plate G1 having scribe lines SL and underlay 14 is manufactured as glass article 11 without performing the peeling step of step S6 and the cutting step of step S7. Also, the manufacturing method of glass article 11 can be changed to a method in which glass plate G1 having scribe lines SL is manufactured as glass article 11 without performing the cutting step of step S7. [Explanation of symbols]

[0071] 11. Glass items 12...Placement table 13...Fixed plate 14...Pad 14a…Scope of use 15...Static charge removal member 16…Roller section 17...Support part 18...Operation unit 19...Export platform D1,D2…Diameter FL…Suction flow path FL1…Opening FL2…Through hole G1: Glass plate SL…Scribe line T…Tools P…Suction device

Claims

1. a preparation step of preparing a mounting table having a base and a pad placed on the base; a placing step of placing a glass plate on the underlay of the placing table; A scribe line forming step of forming a scribe line on the glass plate using a tool, A method for manufacturing a glass article, comprising a static elimination step of eliminating static electricity from the underlay of the placement table prior to the placement step.

2. In the charge removing step, a charge removing member is brought into contact with the underlay of the mounting table to remove charge from the underlay; The static electricity removing member has a roller portion that is capable of rolling on the underlay while being in contact with the underlay, The surface resistivity of the outer circumferential surface of the roller portion is 110 Ω / □ or less, The outer circumferential surface of the roller portion has adhesiveness, The method for manufacturing a glass article according to claim 1 , wherein in the static electricity removing step, the foreign matter on the underlay is removed by adhering the foreign matter on the underlay to an outer circumferential surface of the roller unit.

3. The method for manufacturing a glass article according to claim 2 , wherein the roller portion of the static electricity removing member has an outer peripheral layer whose base material is butyl rubber.

4. The method for manufacturing a glass article according to claim 2 or 3, wherein in the static elimination step, an outer circumferential surface of the roller portion of the static elimination member is brought into contact with the underlay over an entire use range where the glass plate overlaps the underlay.

5. The underlay of the mounting table is made of a synthetic resin sheet, The arithmetic mean roughness Ra of the upper surface of the synthetic resin sheet is 3.75 μm or less; The method for manufacturing a glass article according to claim 1 , wherein the synthetic resin sheet has a thickness of 30 μm or more.

6. The Young's modulus of the synthetic resin sheet is 5000 MPa or less, The method for producing a glass article according to claim 5, wherein the Rockwell hardness as defined in ASTM D785 is R130 or less.

7. The method for producing a glass article according to claim 5 or 6, wherein the synthetic resin sheet includes a layer of at least one resin selected from the group consisting of polyethylene, polyethylene terephthalate, polypropylene, and polycarbonate.

8. The surface resistivity of the synthetic resin sheet is 5.0×10 １０ The method for producing a glass article according to claim 5 or claim 6, wherein the hardness of the glass article is Ω / □ or less.

9. the mounting table has a suction flow path that sucks the glass plate placed on the underlay, The suction flow path has an opening that opens to an upper surface of the base plate, a through hole penetrating the underlay so as to communicate with the opening and open onto both main surfaces of the underlay, The manufacturing method further includes a fixing step of fixing the glass plate on the underlay by sucking the glass plate using the suction flow path after the placing step, The method for manufacturing a glass article according to claim 1 or 2, wherein the scribe line forming step is performed after the fixing step.

10. The method for manufacturing a glass article according to claim 9 , wherein the diameter of the through hole in the underlay is the same as or smaller than the diameter of the opening in the platen.

11. The method for producing a glass article according to claim 1 or 2, wherein the glass plate has a thickness in the range of 0.005 mm or more and 0.5 mm or less.

12. The method for producing a glass article according to claim 11, wherein the glass plate is an alkali aluminosilicate glass.

13. The method for manufacturing a glass article according to claim 1 or 2, wherein the tool is a scribing wheel.

14. The method for producing a glass article according to claim 1 or 2, further comprising, after the scribe line forming step, a dividing step of dividing the glass plate along the scribe line.

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