Process for producing tubular ceramic structures

A process for producing tubular ceramic structures (11) is provided which comprises: a) rotating a mandrel-spindle assembly (25) comprising a mandrel component (27) and a spindle component (23), the mandrel component (27) being a heat shrinkable polymeric tube the external surface of which correspon...

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Bibliographische Detailangaben
Hauptverfasser:	FINNERTY, CAINE M, EMLEY, BENJAMIN J
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTRICITY INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY PERFORMING OPERATIONS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING WORKING CEMENT, CLAY, OR STONE
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Beschreibung
Zusammenfassung:	A process for producing tubular ceramic structures (11) is provided which comprises: a) rotating a mandrel-spindle assembly (25) comprising a mandrel component (27) and a spindle component (23), the mandrel component (27) being a heat shrinkable polymeric tube the external surface of which corresponds to the internal surface of the tubular ceramic structure (11) to be produced and the internal surface of which defines a bore (51), the spindle component (23) being in close fitting but slidably removable contact therewith; b) applying a ceramic-forming composition to the external surface of the mandrel component (27) of the rotating mandrel-spindle assembly (25) to produce a tubular ceramic structure (11) the internal surface of which is in contact with the external surface of the mandrel (27); c) removing the spindle (23) from the bore (51) of the mandrel (27) to provide a mandrel-tubular ceramic structure assembly (40) in which the interior surface of the tubular ceramic structure (11) remains in contact with the external surface of the mandrel (27); and, d) heat shrinking the mandrel component (27,56) of the mandrel-tubular ceramic structure assembly (40) to cause the mandrel (27,56) to undergo shrinkage to a reduced size in which the external surface of the mandrel (56) separates from the interior surface of the tubular ceramic structure (11) facilitating removal of the mandrel (56) therefrom.