One-step forming equipment and process of polyolefin polyurethane thermal insulation composite tube

The invention discloses one-step forming equipment of a polyolefin polyurethane thermal insulation composite tube. The equipment comprises a polyolefin inner tube extruding machine, a vacuum sizing box, a spraying cooling box, a blowing dryer, a first traction machine, a plasma processor, a foaming and shaping device, a coating extruder and a second traction machine, and the foaming and shaping device comprises a foaming and shaping mold, a polyurethane high-pressure foaming machine and a mold temperature controller. The invention further discloses a one-step forming process of the polyolefinpolyurethane thermal insulation composite tube. Compared with an existing two-step method, the tube length can be customized, the production efficiency is improved, and the product quality is guaranteed; and compared with an existing one-step method, bonding force between an inner tube and a polyurethane heat preservation layer is improved, the axial shearing strength meets the standard requirements, and the product quali