INITIAL CRACK FORMATION DEVICE, AND FORMATION METHOD

摘要

Provided is an initial crack formation device (1) for scoring a front-side end (Ga) in a conveyance direction (B) of a glass ribbon (G) conveyed by a belt conveyer (3) so as to form an initial crack group (CG) including a plurality of aggregated initial cracks (C) in a width direction of the front-side end (Ga) orthogonal to the conveyance direction (B). The initial crack formation device (1) includes a flap wheel (4) for scoring the front-side end (Ga) while rotating in a direction of drawing the glass ribbon (G) into the conveyance direction (B). The flap wheel (4) is configured to rotate at a rotational peripheral speed higher than a conveyance speed of the glass ribbon (G).

主权项

1. An initial crack formation device for scoring a front-side end in a conveyance direction of a glass sheet conveyed by conveyance means so as to form an initial crack group including a plurality of aggregated initial cracks in a width direction of the front-side end orthogonal to the conveyance direction,
the initial crack formation device comprising a rotary scoring section for scoring the front-side end while rotating in a direction for drawing the glass sheet into the conveyance direction, the rotary scoring section being configured to rotate at a rotational peripheral speed higher than a conveyance speed of the glass sheet.