Cutting method for tempered glass
A technology for strengthening glass and cutting methods, applied in glass cutting devices, glass manufacturing equipment, metal processing equipment, etc., can solve problems such as poor efficiency, and achieve the effect of improving manufacturing efficiency
Inactive Publication Date: 2015-03-11
NIPPON ELECTRIC GLASS CO LTD
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Problems solved by technology
However, this method is inefficient especially from the viewpoint of production efficiency, and therefore development of a technique for cutting strengthened glass well and for forming scribe lines well on strengthened glass is desired.
Method used
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Embodiment Construction
[0047] Hereinafter, the method of cutting tempered glass according to the first embodiment of the present invention will be described with reference to the drawings. Here, in the following description, the "surface" of the tempered glass refers to the surface on which the scratch line is formed, and the "back surface" refers to the opposite surface.
[0048] figure 1 It is a front sectional view showing a scratching device used in the method of cutting tempered glass according to the first embodiment of the present invention. As shown in the figure, the scratching device 1 includes, as main elements, a support table 2 for supporting the tempered glass G, a wheel cutter 3 for forming a scratch line S on the surface Ga of the tempered glass G, and The pressing bar 4 that presses down the strengthened glass G placed on the support table 2 to bend it.
[0049] A pair of support stands 2 are provided so as to be parallel to both end portions of the tempered glass G in the width ...
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Abstract
This cutting method for tempered glass cuts tempered glass (G) with a scribe line (S) as a boundary after the scribe line (S) is formed along a planned cutting line from the front surface side on tempered glass (G) in which are formed a front surface side compressive stress layer (A1), which is present on a front surface (Ga) side in the direction of thickness and to which compressive stress is applied, a rear surface side compressive stress layer (A2), which is present on a rear surface (Gb) side and to which compressive stress is applied, and an intermediate tensile stress layer (B) present between the front surface side compressive stress layer (A1) and the rear surface side compressive stress layer (A2) and to which tensile stress is applied. When the scribe line (S) is formed, the thickness of the front surface side compressive stress layer (A1) is enhanced at least in the vicinity of a planned cutting line (X).
Description
technical field [0001] The present invention relates to a strengthening glass cutting method for cutting the strengthened glass by forming a scribe line on the strengthened glass. Background technique [0002] It is well known that the surface layer of strengthened glass is strengthened by chemical strengthening treatment such as ion exchange method and physical strengthening treatment such as air cooling strengthening method, and compressive stress layers to which compressive stress is applied are formed on the surface side and the back side in the thickness direction. As a result, the breaking strength against the tensile stress acting on the surface layer portion is significantly improved compared with ordinary glass. Such tempered glass is adopted, for example, as a cover glass for displays in smartphones, tablet PCs, and the like that have spread rapidly in recent years. [0003] However, tempered glass is very difficult to cut, unlike ordinary glass, due to the presen...
Claims
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IPC IPC(8): C03B33/02C03B33/09
CPCC03B33/091C03B33/03C03B33/02C03B33/0222C03B33/033Y10T225/12
Inventor 小西智美中津广之市川耕二国友一伸竹内久博粟津晃
Owner NIPPON ELECTRIC GLASS CO LTD