Method and mould assembly for bending complex shapes on a glass sheet.

摘要

The invention relates to a method and a mould assembly for bending complex shapes on a glass sheet. The invention relates also to a bending mould and its manufacturing method. A heated glass sheet placed upon a ring mould (5) is bent to its final shape by means of an overhead non-contacting mould (6) whose curved lower surface (7, 8) is provided with blasting orifices (10) and suction orifices (11). Blasting orifices (10) are used to blow hot air for heating a glass sheet at least locally while building an air cushion between shaping surface and glass sheet. The hot air blown from blasting orifices (10) is used to apply a greater heat volume to those sections of the glass sheet surface in which the bending radius of a glass sheet is the smallest or deformation (elongation, bending) is the greatest. <IMAGE>