High-Tech HDPE Jacket Pipe Extrusion Line for PU Pre-insulated Pipe

HDPE jacket pipe extrusion line is a high-speed, energy-efficient unit for manufacturing HDPE outer jackets for PU foam pre-insulated thermal pipes, complying with international standards.

Pipes made by this line adopt vacuum calibration. They feature smooth inner and outer surfaces, long service life, excellent corrosion resistance and reliable mechanical properties for thermal insulation.

HDPE jacket pipe extrusion line is a high-speed, energy-efficient unit for manufacturing HDPE outer jackets for PU foam pre-insulated thermal pipes, complying with international standards.

Pipes made by this line adopt vacuum calibration. They feature smooth inner and outer surfaces, long service life, excellent corrosion resistance and reliable mechanical properties for thermal insulation.

Note: The parameters are for reference only which can be selected, matched or modified according to customer requirements.

Note: Equipment configuration and quantity are customized according to customer requirements, with no fixed standard

Solid-liquid separation screw: Adopts double-flight deep & shallow groove structure for solid-liquid splitting and improved melting efficiency, together with an extended homogenizing section for more uniform plasticization. Compared with conventional screws, it delivers 30% higher output and 15% lower energy consumption, bringing substantial electricity savings.

Forced feeding system: Air-isolated flange and cooling water jacket eliminate heat cross-talk, keeping the feeding zone temperature below 80°C. Grooved barrel prevents material backflow to ensure stable feeding and raises output by 20%.

Multi-stream splitting & recombining in spiral mandrel: Material undergoes repeated splitting, pressurization and kneading for higher compaction, improving pipe resistance to pressure and cracking.

Thickened die structure: Buffers ambient temperature fluctuations for stable temperature control. It produces pipes with smooth surface, uniform wall thickness and higher yield rate.

Dual pump & dual vacuum redundant configuration: One unit standby while the other works. Pumps can be replaced online without full-line shutdown and rethreading, securing continuous production and reducing waste from defective pipes.

Optimized load design for traversing motor: An additional flange bears all tensile force. The motor only provides rotational power without axial tension, protecting it from damage and unexpected downtime.

Centralized synchronous drive by single motor: One motor drives all haul-off jaws through mechanical linkage to achieve absolute synchronization. It resolves common issues such as asynchronous movement, slipping, pipe scratches and rapid pad wear.

4-meter extended haul-off frame: Larger contact area enables traction with low clamping force relying on friction. Thin-walled PE pipes avoid compression deformation, with guaranteed straightness and surface finish.

Special cutter with circular notch: The notch locks onto thin small-diameter pipe outer wall to restrain deformation. It eliminates slipping, dragging and scratching during cutting, delivering stable cutting performance and longer service life of blades.