The HDPE jacket pipe extrusion line is designed for extruding a thin-wall outer protective shell used in Polyurethane (PU) foaming pre-insulated directly buried pipes.
This shell provides mechanical protection and waterproofing for the insulation layer.
Huashida Company, a leading manufacturer in China, adopts the vacuum calibration method for stable and precise production.
The line operates smoothly, features Siemens PLC intelligent control, and ensures high-speed, energy-efficient, and environmentally friendly performance - helping customers save production costs.
Structure of Pre-Insulated Pipe:
Carrier Pipe: Steel / Stainless Steel / Plastic / Copper
Insulation Layer: Polyurethane Rigid Foam (PU)
Outer Jacket: High-Density Polyethylene (HDPE) Protective Shell
Screw System: Solid-Liquid Separation & High-Efficiency Plasticization
Adopts next-generation solid-liquid separation screw technology (industry-leading in China);
Multi-zone structure: feeding, separation, plasticizing, homogenizing, and mixing sections;
Long L/D ratio for excellent plasticization;
Extended feeding system ensures fast and stable material compression;
Thermal isolation design prevents heat transfer to the feeding section;
High-speed gearbox and powerful motor for enhanced extrusion efficiency;
Production efficiency improved by approx. 30%, and heating energy consumption reduced by 20%.
Die Head System: Precision Molding & Stress-Relief Design
Made from high-strength alloy steel, resistant to deformation under high temperature and pressure;
Multi-layer spiral flow channels with polished and chrome-plated surfaces for smooth flow;
Counter-rotation design helps release extrusion stress and reduce pipe bursting risk;
Optimized expansion and contraction angles ensure good melt flow and axial strength;
Extended straight section increases radial and axial rigidity;
Supports LDPE, HDPE, and mixed PE materials, lowering production cost.
Control System: Centralized Control & Intelligent Operation
Equipped with a Siemens PLC centralized control system
Custom-designed software integrates system and HMI interaction
One-button control for speed, wall thickness, and production capacity
Supports remote monitoring and fault diagnosis
Easy operation, safe and labor-saving
Planetary Cutter: Hough Block Positioning & Precision Cutting
Features Hough block clamping structure to prevent pipe deformation during cutting;
Ensures vertical and smooth cut surfaces without secondary processing;
Equipped with dust collection system for a clean working environment.
High strength and toughness, smooth surface finish
Uniform wall thickness with excellent pressure resistance
Outstanding resistance to stress cracking and low-temperature impact
Based on German extrusion technology with independent innovation
High automation, stable performance, and energy-saving operation
Compatible with various polyethylene raw materials
Safe operation, easy maintenance, and long service life
District heating pipeline systems
Oil and chemical insulation pipelines
Municipal water supply and drainage projects
Liquid and gas transmission systems
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