METHOD AND APPARATUS FOR FORMING A POLYMERIC CONTAINER SYSTEM FOR PRESSURIZED FLUIDS

摘要

An apparatus for forming a polymeric pressure vessel has an outer tube extruder for driving a fluid polymeric material and forming the fluid polymeric material into an outer tubular member; a variable die located downstream of the outer tube extruder and constructed and arranged to alternately increase and decrease in size to thereby alternately increase and decrease the thickness of the wall of the outer tubular member; and a molding apparatus located downstream of the variable die and constructed and arranged to expand spaced-apart portions of the outer tubular member having greater wall thickness into hollow chambers to thereby form a plurality of serially interconnected hollow chambers.