Vacuum Calibrating HDPE Jacket Pipe Extrusion Line

High-Efficiency Solution for PPU Pre-insulated Pipe Outer Protection

1. Product Overview

 This extrusion line is high-efficiency equipment designed for high-speed operation and energy saving. 1.2 It is specifically used for producing HDPE pipes that serve as the protective outer cover for Polyurethane (PU) foam thermal pre-insulated pipes. 1.3 The machinery features a compact size, easy operation via an automatic control system, and a long service life. 1.4 Pipe/Jacket Diameter Range: 110mm – 1680mm. 1.5 Pipe Usage: Outer casing for thermal insulating pipes widely used in central heating, oil, natural gas, and other industrial sectors.

2. Machine Advantages

High Productivity: The high-efficiency extruder ensures larger output and stable performance. 2.2 Material Savings: Pipe walls are uniform and smooth, reducing raw material waste; wall thickness is fully adjustable. 2.3 Seamless Production: No need for edge trimming; the pipe is finished in a single forming process. 2.4 Labor Efficiency: High degree of automation allows the entire line to be operated by a single person, significantly saving labor costs.

3. Production Line Composition

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 — No-dust cutting machine

1 set — Stacker

4. Detailed Technical Components

4.1 High-Efficiency Single Screw Extruder

The single screw is designed with a barrier and mixing head.

Features a new model barrel with feed slotting (channels).

This combination guarantees excellent jellification (homogenization), large output, and stable performance.

4.2 Precision Die-Head System

The die-head is primarily composed of a mandril, neck mold, spiral body, cover, die-head body, bolts, and heating rings.

All internal surfaces in contact with plastic materials are polished and chrome-plated to ensure smooth flow and zero rusting.

The uniformity of the pipe wall thickness is precisely adjustable via specialized bolts.

A copper calibrating sleeve fixed in the die-head is used to cool the fresh pipe and set the initial outer diameter.

4.3 Vacuum Calibration Tank

Composed of a heavy-duty frame, stainless steel tank, vacuum system, spray cooling system, and position adjustment device.

The vacuum pump exhausts air from the sealed tank to force the fresh pipe against the copper sleeve, ensuring an exact outer diameter.

Spray nozzles deliver cooling water from all directions onto the pipe surface to set the shape promptly.

4.4 Haul-off Machine

Composed of a driving device, tracks, clamping structure, adjusting system, side plate, and foundation bed.

The haul-off tracks are driven by an AC motor with frequency conversion control to synchronize with various extrusion speeds.

Includes an automatic length-measuring device to realize precise cutting at set lengths.

4.5 No-Dust Cutter

Adopts the blade punching principle to achieve high-speed cutting without generating dust or waste.

Composed of a cutting device, clamping device, synchronous movement structure, and frame.

4.6 Centralized Control System

The complete production line is controlled by a PLC with a high-quality human-machine interface (HMI).

All technical parameters can be set and monitored via a high-resolution touch screen.

The control system can be customized according to specific customer operational requirements.

4.7 Discharging Frame

The table surface is constructed from corrosion-resistant stainless steel.

Utilizes a pneumatic overturn system for automatic discharging of finished pipes.

5. Company Profile: Qingdao Huashida Machinery Co., Ltd.

Experience: A specialized manufacturer with 23 years of experience in plastic pipe machinery and anti-corrosion equipment.

Global Reach: Serving over 400 overseas customers, exporting to Kazakhstan, Uzbekistan, Iran, Turkey, Russia, Nigeria, and beyond.

Core Product Range: 3.1 HDPE Jacket Pipe Production Lines (110-2200mm). 3.2 Steel Pipe FBE/2LPE/3LPE Anti-corrosion Coating Lines. 3.3 Steel Pipe Derusting & Shot Blasting Lines. 3.4 Pipeline Anti-corrosion Materials: Heat shrink sleeves, electro-fusion joints, and PE/PP welding rods.