| 摘要 |
A process and die for forming an end cap in an extruded ceramic tube. The die (1) has a body (10) configured to be situated against an extrusion die. The body (10) is provided with an end cap forming cavity (12). A backfill reservoir (14) is provided within the body (10) to receive ceramic material forming the ceramic tube from the cavity. A passageway (16) communicates between the cavity (12) and the backfill reservoir (14) for passage of the ceramic material. The cavity (12) is positioned so that when the body (10) is situated against the extrusion die (4), ceramic material is able to be forced into the cavity (12), through the passageway (16), and into the backfill reservoir (14). A plunger (18) projects into the backfill reservoir (14) to force the ceramic material from the backfill reservoir (14) back trough the passageway (16) and into the cavity (12) to compact the ceramic material so that the latter within the end cap will be provided with a substantially uniform density. <IMAGE> |
