Method and apparatus for producing tubular glass article

Details Method and apparatus for producing tubular glass article Method and apparatus for producing tubular glass article

C - Chemistry, Metallurgy

03

B

32/60, 49/77, 49

C03B 37/014 (2006.01) C03B 19/14 (2006.01) C03B 20/00 (2006.01)

Patent

CA 1188893

Abstract of the Disclosure Disclosed are a method and apparatus for forming a continuous length of glass article. A coating of glass particles is deposited on a mandrel having a thermal coef- ficient of expansion much greater than that of the glass particles. The mandrel is allowed to cool, thereby causing it to shrink and separate from the coating. The coating is indexed a discrete longitudinal distance along the mandrel, thereby uncovering a region of the mandrel. Another coating of glass particles is deposited on the uncovered region of the mandrel and over a portion of the previously applied coating. The steps or separating or freeing the coating from the mandrel, longitudinally indexing the coating with respect to the mandrel and depositing another coating are repeated. Thus, each step of indexing longitudinally trans- iates an incremental length of a porous body from the end of the mandrel.

416134

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