Molded body made of silicon dioxide, comprises at least one channel-shaped region whose surface comprises protrusions and/or recesses which form a helix in the channel-shaped region

摘要

Molded body made of silicon dioxide, comprises at least one channel-shaped region whose surface comprises protrusions and/or recesses which form a helix in the channel-shaped region. Independent claims are also included for: (1) producing the molded body, comprising extruding flowable silicon dioxide mass using an extruder; and (2) a device for carrying out the above method, comprising at least one extruder which comprises a head comprising a device, by which a flowable mass is solidifiable.