High-yield Pre-insulated Pipe Shell Vacuum Shaping Extrusion Line

Huashida’s high-efficiency extrusion line produces black HDPE outer jackets for PU foam pre-insulated pipes. With a compact layout and easy operation, it delivers fast production speed and low energy consumption. Fitted with an automatic control system, the line ensures 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 increases production capacity while keeping stable operation.
• It forms uniform and smooth pipe walls to lower raw material consumption and allows adjustable wall thickness.
• The pipe adopts complete one-pass forming without edge trimming.
• Highly automated, this production line needs only one operator to help reduce labor costs.

The single screw is fitted with a barrier mixing head and matched with a newly designed slotted barrel. This structure ensures good plasticization, high throughput and stable operation.

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

The haul-off machine comprises a drive unit, hauling tracks, clamping mechanism, adjustment system, side plates and base frame. Its tracks are driven by frequency-regulated 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 to achieve dust-free cutting. It is composed of a cutting assembly, clamping assembly, synchronous motion mechanism and frame.

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

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

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