Nippon Electric Glass Co., Ltd.

Taiki Minari

Yasuo Teranishi

Yasuhiro Matsumoto

Takaya Furuta

A full body of a glass sheet (G) is cut by forming an initial crack () on a preset cutting line () of the glass sheet (G) that is supported by a support member (()) from a back surface side of the glass sheet (G), followed by propagating the initial crack () while passing through the glass sheet from a front surface to the back surface thereof due to a stress generated through localized heating along the preset cutting line () and cooling of a heated region that is formed through the localized heating, the glass sheet (G) being supported by the support member (()) from the back surface side through an intermediation of an elastic sheet (E) having low thermal conductivity.

Method for cutting plate-like glass, and cutting device therefor

Provided is a method of cutting a glass sheet (G) by performing at least localized heating along a preset cutting line () of the glass sheet (G), the method comprising cutting a full body of the glass sheet (G) by performing at least the localized heating along the preset cutting line () of the glass sheet (G) under a state in which support members (()) for supporting, from a back surface side of the glass sheet (G), portions of the glass sheet (G) that are situated apart from the preset cutting line () toward both sides thereof are arranged apart from each other so as to form a space (S) on the back surface side of the preset cutting line ().

In a cleaving apparatus for a glass film, an initial crack, which is formed at a leading end portion of a preset cleaving line of a glass film, is propagated along the preset cleaving line by a thermal stress generated in the glass film through localized heating performed along the preset cleaving line and cooling of a heated region resulting from the localized heating. At this time, a resin sheet having higher flexibility than the glass film is arranged in a cleaving region, and the resin sheet is floated by blowing a gas on a lower surface of the resin sheet by a floating unit. Then, a preset cleaving portion of the glass film including the preset cleaving line is lifted and supported while being covered with the floated resin sheet from below, and in this state, the glass film is cleaved.

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Shiga, Japan

Taiki Minari