Efficient large-sized pipe extrusion molding device

The utility model discloses an efficient large-sized pipe extrusion molding device. The efficient large-sized pipe extrusion molding device mainly comprises a planetary screw extruder, a gas-assisted extrusion molding machine head and a traction device, wherein the planetary screw extruder consists of a temperature control system, a transmission system, a conveying segment and a planetary segment, and the planetary segment comprises a plurality of planetary screws and a main screw; the gas-assisted extrusion molding machine head consists of a machine head body, a flow splitting cone, a flow splitting cone bracket, a mouth mold, a core rod, a gas nozzle A, a gas nozzle B, a perforated embedded pipe A, a perforated embedded pipe B, a gas chamber outer pipe, a nut, a sealing gasket, a coupling head, a mouth mold pressing plate, a gas nozzle and a heating coil. According to the efficient large-sized pipe extrusion molding device, a layer of uniform gas film is formed on each of the inside and outside surfaces of a pipe blank through a gas-assisted extrusion technology, so that the resistance of material extrusion is reduced, and the problem that the outlet pressure of the planetary screw extruder is low is solved; by using the combination of the planetary screw extruder and the gas-assisted extrusion molding machine head, large-batch production is realized; through axially and radially drawing PVC (Polyvinyl Chloride) pipe blanks, PVC-O pipes with high strength and high toughness can be produced.