| 摘要 |
A system (10) is disclosed for manufacturing multi-wall corrugated polymer pipe. The system (10) includes an extruder (18) configured to co- extrude concentric annular tubes a corrugator (20) configured to form the concentric annular tubes into a dual -wall pipe having a smooth wall and a corrugated wall (122, 222), a cross -head die (22) configured to extrude an outer wall of pipe onto the corrugated wall (122, 222) of the dual -wall pipe, a vacuum punch (26) configured to penetrate the outer wall of pipe and draw a vacuum between the corrugated wall (122, 222) and the outer wall, such that the outer wall of pipe deforms inward toward the corrugated wall (122, 222) of pipe between bell and spigot portions of the corrugated wall (122, 222), and a cutter (40) configured to cut the pipe into sections where the vacuum punch (26) deformed the outer wall between the bell (112) and spigot (114) portions of the corrugated wall (122, 222). A method of manufacturing multi-wall corrugated polymer pipe is also disclosed. |
