B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
18/1103
B29D 23/08 (1980.01) B29C 13/04 (1980.01)
Patent
CA 1092768
ABSTRACT OF THE DISCLOSURE: An apparatus for checking the inner surface of tubes by resin casting comprises a rigid tube fitted into a tube made of resilient material of which the end sections are sealingly mated to the respective end sections of the rigid tube. The resilient tube is provided at the end sections of its outer surface with peripheral seals of which the outer diameter is slightly smaller than the inner diameter of the tube being ins- pected. Between the seals the resilient tube is provided with a plurality of peripheral ribs regularly spaced from one another and with dovetail cross-section. A duct connectible to a pres- surized fluid vessel communicates with the outer surface of-the rigid tube, a duct connectible to a vessel containing a pres- surized polymerizable resin communicates with the outer surface of the resilient tube and a duct connectible to a vacuum vessel or to the atmosphere also communicates with the outer surface of the resilient tube. Also disclosed is a method whereby a replica is made by flowing a silicone resin into the space between the tube being inspected and the outside of the apparatus. After polymerization, the resilient tube contracts and while contracting draws the replica therewith. Thus between the tube being copied and the replica a clearance is formed great enough for permitting the withdrawal of the apparatus from the tube along with the replica of the latter.
275008
Mantega Franco
Oriani Attilio
Comitato Nazionale Per L'energia Nucleare -C N. E. N.
Robic Robic & Associes/associates
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