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As a leading manufacturer with over a decade of expertise in plastic machinery, Qingdao Yongke Machinery Co., Ltd. is proud to introduce our advanced Krah Profile Pipe Extrusion Machine. Engineered for high-efficiency production of HDPE Krah (spiral wound) profile pipes, this machine integrates precision engineering with user-friendly PLC control to deliver reliable performance for demanding industrial applications. Our commitment to innovation and quality, backed by ISO9001 certification, ensures that this extrusion line meets the rigorous standards required for municipal drainage, industrial wastewater systems, and cable protection projects worldwide.
This machine is designed to transform HDPE granules into robust, large-diameter profile pipes through a continuous extrusion and spiral winding process. The core of its operation lies in the synchronized control of multiple components.
- PLC & Touch Screen Control: The heart of the machine is an industrial-grade PLC system paired with a large, intuitive touch screen interface. This allows for precise parameter setting, real-time monitoring of temperature, speed, and pressure, and automated fault diagnosis, significantly reducing operator error and downtime.
- High-Efficiency Extruder: Features a specially designed screw and barrel for optimal plasticizing and conveying of HDPE material. Multiple independently controlled heating and cooling zones ensure uniform melt temperature and stable extrusion output.
- Precision Profile Die Head: Custom-engineered die head creates the specific HDPE profile strip that forms the pipe wall. It is designed for easy adjustment to produce different profile dimensions.
- Spiral Winding & Fusion Unit: The extruded profile is spirally wound onto a mandrel. A dedicated heating and pressure fusion system ensures a strong, leak-proof weld between the profile winds, creating a seamless pipe structure.
- AC Variable Frequency Drives: All critical drives, including the extruder screw, haul-off, and winding unit, are powered by AC variable frequency drives for smooth speed adjustment, energy savings, and consistent torque.
The machine offers distinct advantages for pipe producers:
- Operational Simplicity: The centralized PLC control makes complex pipe production manageable, requiring less skilled labor.
- Production Consistency: Automated controls maintain stable process conditions, resulting in pipes with uniform wall thickness and consistent quality batch after batch.
- Material Efficiency: Precise control over extrusion and winding minimizes material waste, optimizing raw material usage.
- Versatility: By changing the die head and mandrel, the machine can be configured to produce a range of pipe diameters and wall thicknesses to meet specific project requirements.
- Durability & Low Maintenance: Built with high-grade components and a robust frame, the machine is designed for continuous operation in industrial environments with minimal maintenance needs.
Below is a summary of key technical specifications. Please note that specific parameters can be customized based on your production targets.
| Parameter | Description / Typical Range |
| Applicable Raw Material | HDPE (High-Density Polyethylene) Granules |
| Screw Diameter (Example) | 90mm, 120mm, or customized |
| L/D Ratio | 28:1 to 33:1 for optimal HDPE processing |
| Heating Zones (Extruder) | 4 to 6 zones with independent PID control |
| Main Drive Power | Customizable (e.g., 55kW, 90kW) |
| Control System | PLC (Siemens/Mitsubishi optional) with Touch Screen HMI |
| Producible Pipe Diameter Range | From DN/ID 300mm up to 2500mm or larger (configurable) |
| Production Line Layout | Extruder, Profile Die, Cooling Trough, Haul-Off, Spiral Winding & Fusion Station, Cutting Unit |
Operating from our 10,000-30,000 square meter manufacturing facility in Qingdao, our team of 51-100 skilled professionals ensures every machine is built to exacting standards. Our products have gained the trust of clients across North America, South America, Europe, Southeast Asia, Africa, and Oceania, supported by an annual export value reaching US$1.5 Million. This global reach is a testament to the reliability and performance of our machinery. We combine this proven track record with integrated management systems (ISO9001, ISO14000, OHSAS18001) to guarantee not just a product, but a dependable production solution. For enhancing your HDPE profile pipe production with efficiency, control, and quality, contact us to discuss configuring a machine for your specific needs.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of a Krah profile pipe compared to a solid-wall pipe?
A: Krah profile pipes offer an excellent strength-to-weight ratio. Their spiral-wound, structured-wall design provides high ring stiffness while using less material, making them lightweight, cost-effective for large diameters, and easier to transport and install.
Q2: How does the PLC control system benefit the operation?
A: The PLC system automates critical functions like temperature control, speed synchronization, and fault monitoring. It stores recipes for different products, ensures repeatable quality, reduces manual intervention, and provides detailed production data for process optimization.
Q3: Can this machine process recycled HDPE material?
A: Yes, it is capable of processing a blend of virgin and recycled HDPE granules. The screw design and temperature profile can be optimized for the specific flow characteristics of recycled material, though the percentage and quality of regrind should be evaluated for optimal results.
Q4: What is the typical output (kg/hour) of this machine?
A: The output depends heavily on the screw size, pipe diameter, and wall thickness. For example, a machine with a 120mm screw might produce approximately 300-500 kg/hour. We provide output estimates based on your target pipe specifications during the quotation process.
Q5: What kind of after-sales support do you provide?
A: We offer comprehensive support including detailed installation manuals, on-site installation guidance and commissioning by our engineers (optional), operator training, a supply of spare parts, and remote technical assistance via phone or video call.
Q6: How long does it take to deliver and install the machine?
A: The standard manufacturing lead time is approximately 60-90 days after order confirmation. Installation and commissioning typically require 2-3 weeks, depending on the complexity of the line and site readiness. All timelines are confirmed in the project plan.
Q7: Can the machine produce pipes with different profile shapes?
A: The core profile shape is determined by the die head. While the standard machine is set up for a common Krah profile, custom die heads can be manufactured to produce alternative profile geometries tailored to specific mechanical performance requirements.
Q8: What utilities are required to run this extrusion line?
A: The main requirements are a stable electrical power supply (voltage and capacity as per machine specification), compressed air for pneumatic components, and cooling water for the extruder barrel and downstream cooling tanks. A detailed utility list is provided with the technical layout.
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