METHOD FOR MANUFACTURE OF BIPLASTIC PIPES Russian patent published in 2006 - IPC B29D23/00 B29C47/20 B29C53/32 B29L23/00 

FIELD: manufacture of pipes, applicable for manufacture of long-sized biplastic pipes.

SUBSTANCE: the method consists in formation of a polymeric pipe shell, application of a fibrous filler with a binding material onto its outer surface and polymerization. Stiffening ribs with grooves crossing the stiffening ribs are formed on the outer surface of the pipe shell. Application of the fibrous filler with the binding material is accomplished on the outer surfaces of the pipe shell, stiffening ribs and grooves.

EFFECT: obtained a reliable mechanical joint of the pipe she; with glass plastic in the process of continuous manufacture of biplastic pipes in a single process cycle at a minimal consumption of material.

23 cl, 12 dwg