| 摘要 |
The present invention relates to a method and an apparatus for manufacturing a polyethylene pipe for safely coupling the inner circumference. More specifically, confluent resins are provided to make differences in the forms of the convex and the concave of embossed materials extruded as a double-layered sewer pipe profile or a triple-layered sewer pipe profile. Thereby, the profiles are spirally coupled, while unevenly coupling each other, so as for the rest of the space to be supplied with molten resins as a connecting member. Thereby, the bonding of the connecting member can be tremendously increased. |
