| 摘要 |
The present invention relates to a molding device for DC double-walled drain pipe for friction coefficient reduction and inner diameter reinforcement. More specifically, the present invention relates to a molding device for DC double-walled drain pipe for friction coefficient reduction and inner diameter reinforcement, which coats inner pipe formed in the inner diameter or the inner diameter with silicone while molding the DC double-walled drain pipe which continuously molds a groove part and a projection part externally, thereby increasing water permeability by friction coefficient reduction and improving hardness. |
