High-speed HDPE Outer Sheath Vacuum Extrusion Line

Huashida’s high-efficiency extrusion line manufactures black HDPE outer jackets for PU foam pre-insulated pipes. Featuring a compact layout and simple operation, it offers fast production speed and low energy consumption. Equipped with an automatic control system, the line maintains stable and continuous long-run operation.

• 1 set — Vacuum loader
• 1 set — Hopper dryer
• 1 set — High-efficiency single screw extruder
• 1 set — Vacuum calibration table
• 1 set — Water spraying tank
• 1 set — Hauling machine
• 1 set — Cutting machine
• 1 set — Discharging frame

• This high-efficiency extruder raises production output while maintaining stable operation.
• It yields uniform, smooth pipe walls to cut raw material consumption and allows adjustable wall thickness.
• The pipe achieves complete one-pass forming without edge trimming.
• Highly automated, this production line only needs one operator, helping reduce labor costs.

The single screw comes with a barrier mixing head and matches a newly designed slotted barrel. This structure delivers superior plasticization, high throughput and consistent running performance.

The vacuum calibration tank comprises a frame, stainless steel tank body, vacuum unit, spray cooling system and position adjuster. The vacuum pump extracts air from the sealed tank, pressing the newly extruded pipe firmly against the sizing copper sleeve to set its outer diameter. Spray nozzles eject cooling water from all directions for fast surface cooling of the pipe.

The haul-off machine includes a drive unit, hauling tracks, clamping mechanism, adjustment system, side plates and base frame. Its tracks are driven by frequency-controlled AC motors to accommodate different extrusion speeds. Fitted with an automatic length counter, it supports cutting at preset lengths.

This cutter uses blade punching technology for dust-free cutting. It comprises a cutting assembly, clamping assembly, synchronous motion mechanism and frame.

It has a stainless steel tabletop and uses pneumatic turnover for automatic discharging.

Founded in 2003, Qingdao Huashida Machinery Co., Ltd. specializes in the R&D and manufacturing of pipeline anti-corrosion equipment and supporting raw materials. As a leading domestic manufacturer of heat-shrinkable sleeves and corresponding machinery, Huashida has earned wide recognition from global customers. Many of our equipment designs are covered by patents, and we hold ISO 9001, ISO 14001 environmental management and ISO 45001 occupational health and safety certifications.

To date, more than 500 production lines have been exported to Russia, Kazakhstan, Belarus, Egypt, Iran, Indonesia and other countries. Continuously optimized from real production experience, Huashida’s heat-shrinkable sleeve equipment has been upgraded to the fourth generation. The complete production line features a neat layout, intelligent operation and high efficiency, lowering consumption of energy, raw materials and labor. Optimized components ensure uniform wall thickness along with enhanced shrinkage performance, tensile strength and elongation at break. Our products meet diverse pipeline anti-corrosion demands, and our professional after-sales team offers on-site service and online video training for fast troubleshooting.