The invention discloses a preparation method of DRPO double-layer co-extruded steel-plastic reinforced winding pipes and a double-layer co-extrusion die, belonging to the technical field of winding pipe production. The steps are as follows: pre-treating the surface of multiple steel strips for standby; fixing the double-layer co-extrusion die and equipping it with matched extruders for co-extrusion molding; allowing steel strips to pass through the die and completing steel-plastic composite extrusion to form winding strips under extruder operation; cooling and shaping the winding strips by cooling equipment; drawing the shaped strips to a pipe winding machine for spiral winding to form steel-plastic pipes; cutting the finished pipes to required lengths. This process realizes color modification and performance modification on the inner and outer surfaces of steel-plastic pipes, and effectively enhances overall rigidity, strength and durability.
Area Code: CN
Application Number: CN201910875652.2
