| 摘要 |
The present invention relates to an unevenness connecting type double-walled sewer manufacturing method to improve hardness and cohesion and, more specifically, relates to a sewer manufacturing method for molding a double-walled sewer, wherein after extruding a profile from a second extruder (20) to be cooled in a cooling device (29), the profile is spirally supplied to a pipe manufacturing device (10), and a connection member is supplied to a gap of the profile in a third extruder (30). The manufacturing method comprises: a profile extruding step; a connection member extruding step; a reinforced connection member extruding step; and a profile coupling step. The present invention is to stably couple a profile and a reinforced connection member by coupling a coupling uneven groove of the profile and a coupling protrusion of the reinforced connection member to be equal while having an uneven shape. |
