How does HDPE Hollow Wall Winding Pipe Machine Work?

The core features of HDPE hollow wall winding pipe machine include hot air welding unit, spiral winding mechanism and synchronous cooling module. Its working principle is essentially the structural reorganization process of thermoplastic polymer materials within a specific temperature window.

HDPE hollow wall winding pipe machine performs gradient heating when producing pipes. The first-stage solid conveying zone preheats the crystallized polymer, and the second-stage melt mixing zone completely destroys the molecular lattice to make the material reach a viscous flow state. The melt is extruded through a flat die to form a continuous base belt, and the extrusion rate and temperature are precisely controlled to maintain the melt strength.

The high-temperature base belt is spirally wound on the surface of the core mold at a preset inclination angle, and the overlapping area between adjacent turns is instantly heated by a hot air nozzle. When the base belt is wound to the preset number of layers, the hydraulic pressure roller array imposes forced deformation on the pipe wall, causing the surface material to sink into the bottom of the inner corrugated valley to form a closed chamber. The cavity structure is finalized as a mechanical reinforcement unit in subsequent cooling.

The partitioned spray system of HDPE hollow wall winding pipe machine achieves gradient cooling. The outer surface of the water pipe is first quenched with atomized water to form a hardened shell, and the internal heat is slowly discharged through the core mold circulating water cooling. This process helps to eliminate residual thermal stress and avoid circumferential shrinkage and deformation of the pipe. The laser diameter gauge can provide real-time feedback to adjust the cooling intensity.