20-150mm Polyurethane Spraying Foam Pre Insulated Steel Pipe Making Machine 380V

Polyethylene winding, the semi-finished pipe sprayed with polyurethane insulation layer is spirally run on the transmission line, the extruder extrudes a certain thickness of molten polyethylene sheet is wound on the outer surface of the insulation layer, with the continuous rotation of the semi-finished pipe, the extruder continuously extrudes the molten polyethylene sheet, and is superficially wound on the surface of the polyurethane layer according to the controlled pitch.

Technological flow of the polyurethane coating steel preinsulated pipe equipment:
1. Remove rust from steel pipe surface
2. Heat the steel pipe to get it ready for polyurethane spraying
3. Spray polyurethane evenly on steel pipe outer surface
4. Wrap melted HDPE strap around the PU foam
5. Trim the pipe ends

Spray cooling: The semi-finished pipe wrapped with the polyethylene outer coating is cooled by an online spray device. The polyethylene outer coating tightly wraps the polyurethane insulation layer on the steel pipe/piece to complete the production of the polyethylene outer coating.
When the sensor senses the insulation pipe, the control system automatically starts the cutting saw. When the saw blade rotates at a high speed, the cutting mechanism as a whole performs ring cutting at the advancing speed of the insulation pipe. Dynamic cutting not only ensures the cutting quality of the product, but also ensures the continuity of production and improves production efficiency.

Rust removal of steel pipe/piece, the hydraulic lifting mechanism is used to transport the steel pipe/piece to the transmission pipe conveying line of the steel pipe shot blasting cleaning line, and the steel pipe/piece is turned and entered the shot blasting room. When the signal of the steel pipe/piece is collected by the internal sensor, the control system commands the shot gate to open, and the pellets are thrown against the outer wall of the steel pipe to remove the rust and impurities attached to the outer wall of the steel pipe. The steel pipe workpiece enters the output roller table, and after shot blasting, the outer surface of the steel pipe workpiece meets the requirements of sa2.5.

Polyurethane spraying, the steel pipe in a certain Angle of the rotating tugboat uniform speed, spraying robot will be the polyurethane raw materials in the shape of umbrella, fog and mixed evenly spray on the spiral forward steel pipe, polyurethane raw materials launched within a certain period of time, to meet the technical requirements of the compressive strength and design thickness, to complete the production of spraying insulation layer. Multiple spraying can be performed when the required thickness is large.

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