Method for making pipe of fabric impregnated with resin
AssigneeSociete Nationale Industrielle et Aerospatiale
InventorsGuy B. E. Lecourt, Claude L. L. Portalier
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Abstract
The invention is a method for the manufacture of hollow bodies, particularly pipes, from fabric reinforced resin by forming a coil of fabric impregnated with resin, which is dried, preheated, and introduced into a preheated mold. The coil is pressed axially into the mold between a preheated borer defining the interior shape of the pipe, and a sleeve, and the resin impregnated in the fabric is polymerized. The product is useful in the manufacture of nozzles for missiles or the like.
Claims10
A method for making a tubular hollow body from fabric impregnated with a thermosetting resin, comprising:
- forming a coil of dry, thermosetting resin impregnated fabric, inserting the coil into a hollow mold having two open ends, inserting a preheated mandrel into the coil through a first of said open ends, said mandrel having a conical portion and a cylindrical portion, causing turns of the coil to shift axially and form a conical shape larger than said coil as initially inserted in said mold, inserting a presser sleeve into the mold through the second open end, said sleeve surrounding said cylindrical portion and cooperating with said mandrel and said hollow mold to exert pressure on said coil and to shape said coil while maintaining the temperature of the coil above the softening point of the resin but below a temperature at which significant further polymerization will occur, and then further polymerizing said resin.
Dependencies are inferred from the claim text.