Manufacturing equipment of stiffness gradient-type hollow elongate body

摘要

PURPOSE:To prevent the generation of a flaw part of mechanical strength on the surface of a hollow long member inclined in rigidity in its longitudinal direction at the time of production. CONSTITUTION:The emitting ports of first and second polymer supply parts 1, 2 as supply means of polymers different in elastic modulus are connected to the passage F reaching a long land die 5. A fluid supply nozzle 7 emitting a fluid for forming a hollow part is arranged in the polymer supply passage 110 between the confluent part 3 in the passage F of the polymers emitted from the polymer supply means and the first polymer supply part 1. The long land die 5 is constituted so that the inner surface thereof is coated with the molding aid emitted from a molding aid supply part 4. Since the nozzle 7 is arranged on this side of the confluent part 3, a seam line where polymers of a different kind remain is not generated in the obtained long member.