Method for forming a tubular fibrous body
Abstract
Abstract A METHOD FOR MAKING A TUBULAR FIBROUS BODY OR DUCT SECTION FASHIONED WITH SHIPLAP END FORMATIONS WHEREIN THE END REGIONS OF THE BODY OR SECTION ARE OF INCREASED DENSITY. A MASS OR MAT OF BINDER-IMPREGNATED FIBERS, PREFERABLY MINERAL FIBERS, IS WOUND INTO TUBULAR FORMATION ON A FORAMINOUS MANDREL. THE FIBERS ARE COMPRESSED DURING THE WINDING AND A REDUCED PRESSURE IS ESTABLISHED WITHIN THE MANDREL AS AN ASSIST IN COLLECTING THE FIBROUS MASS OR MAT INTO TUBULAR FORMATION. A THERMAL TREATMENT IS THEN ADMINISTERED TO THE TUBULAR BODY OR DUCT SECTION WHILE ROTATING THE SAME ON THE MANDREL TO CURE THE BINDER. NARROW END REGIONS OF THE TUBULAR BODY OR DUCT SECTION ARE COMPRESSED TO A HIGHER DENSITY THAN THE MAIN BODY OR SECTIONS DURING THE WINDING.
Inventors
- 👤 R Kissell
- 👤 D Richards
- 👤 R Beeson
Bibliographic Details
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