Device for producing a molding of glass or glass ceramic comprises a unit for producing a gob of viscous material, and a pressing unit for forming a preform consisting of a pressing mold having two parts for receiving the material gob

摘要

Device for producing a molding of glass or glass ceramic comprises a unit for producing a gob of viscous material, and a pressing unit for forming a preform consisting of a pressing mold (2) having two parts for receiving the material gob (1). At least one of the pressing mold parts has an open pore material region facing the material gob and forming a pressing surface (2.4). Feed channels (2.1) are provided to form a connection between a compressed gas source and the open pore material.