Method and device for producing large cylindrical structures
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United States of America Patent
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Nov 10, 2015
Grant Date -
Dec 26, 2013
app pub date -
Nov 16, 2011
filing date -
Nov 19, 2010
priority date (Note) -
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Abstract
A large cylindrically tubular molded part is made by assembling a plurality of inner segments into a tubularly cylindrical mold inner part having an outer surface centered on an axis and then juxtaposing reinforcing fibers with the outer surface. Then a plurality of outer segments are assembled into a tubularly cylindrical mold outer part coaxial with the mold inner part and having an inner surface radially confronting the outer surface of the inner part and forming therewith a mold cavity containing the reinforcing fibers. Multiple turns of prestressing cables are then wound under tension around the outer mold part to press the outer segments angularly together and the cavity is with a hard-curing plastic that is cured in the cavity to form the molded part reinforced with the reinforcing fibers. The inner segments are radially inwardly and the outer segments radially outwardly retracted then to demold the molded part.
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