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AssigneeHeraeus Quarzglas GmbH & Co. KG
InventorsChristian SCHENK, Markus KÖNIG, Michael WENTZEL
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The production of near-net geometry rings from a multi-component glass, in particular thick-walled rings with wall thicknesses of more than 10 mm. For this purpose, a ring-shaped blank is first produced from the multi-component glass using a casting process, in which a casting strand made of a glass melt of the multi-component glass is fed into a casting mold with a ring-shaped casting cavity running around a center axis. The casting strand hitting an impact zone diverges into a right-hand substream and a left-hand substream, with the substreams converging at a merging zone in the casting cavity and filling the casting cavity over at least part of its height. After the glass melt cools, a ring-shaped blank is obtained, which is further processed into a glass ring made of the multi-component glass.
A method for producing a glass ring from multi-component glass, wherein a ring-shaped blank is produced from the multi-component glass by means of a casting process comprising the following method steps:
A device for producing a glass ring from glass by casting a glass melt, comprising:
A glass ring made of multi-component glass, which glass ring has a center line and a cross-section, which is defined by an upper side, a bottom side opposite thereto, an outer wall and an inner wall, and which has at an azimuthal position a radial casting stria, which extends, with respect to the center line, in the radial direction in the area between the inner wall and the outer wall.
Dependencies are inferred from the claim text.