Qingdao Huashida Machinery Co., Ltd.
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A pre-insulated plastic pipe machine is a specialized production line used to manufacture insulated plastic pipes, commonly used in district heating, hot water supply, and industrial applications. These pipes typically consist of an inner plastic pipe (often PEX, PP-R), an insulating layer (usually polyurethane foam or another thermal insulator), and an outer protective casing (often HDPE or another durable plastic).
| Component | Description | Key Sub-Parts |
|---|---|---|
| Inner Pipe Extrusion Line | Produces the inner plastic pipe (PEX, PP-R, PB, etc.). | - Extruder - Die head - Vacuum calibration - Cooling tank - Haul-off unit |
| Foam Insulation System | Applies polyurethane (PUR) foam insulation around the inner pipe for thermal efficiency. | - Foam pouring station/spray system - Density & thickness control system |
| Outer Jacket Extrusion Line | Extrudes the outer protective layer (typically HDPE) over the foam insulation. | - Extruder - Crosshead die - Cooling system - Haul-off unit |
| Corrugation/Smooth Layer Option | Some machines allow corrugated outer layers for flexibility or smooth layers for rigid applications. | - Corrugator module (if applicable) |
| Cutting & Stacking System | Cuts finished pipes to required lengths and stacks them for packaging. | - Automated saw/cutter - Conveyor system - Stacking robot/mechanism |