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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 present our advanced Plastic HDPE Krah Pipe Extrusion Machine. Engineered for high-volume, consistent production of durable HDPE spiral winding corrugated pipes, this machine is the cornerstone of modern drainage and sewerage infrastructure projects worldwide. Our commitment to innovation and quality, backed by ISO9001, ISO14000, and OHSAS18001 certifications, ensures that every machine we produce meets the rigorous demands of the global market. We understand that your production efficiency and product reliability are paramount, which is why we have designed this extrusion line to deliver superior performance, operational stability, and long-term value for pipe manufacturers across North America, South America, Europe, Asia, and beyond.
This integrated production line combines precision extrusion with advanced spiral winding technology to manufacture high-strength, double-walled corrugated HDPE pipes, commonly known as Krah pipes. These pipes are essential for municipal drainage, industrial sewer systems, land drainage, and cable conduit protection due to their excellent ring stiffness, chemical resistance, and long service life. Our machine transforms high-quality HDPE raw material into finished pipes with consistent wall thickness, precise corrugation geometry, and smooth inner surfaces in a continuous, automated process.
Core Technical Features & Advantages:
- High-Efficiency Extrusion System: Equipped with a high-torque, energy-saving single or twin-screw extruder (model dependent) that ensures stable plasticizing and consistent melt pressure for uniform pipe quality. The barrel and screw are crafted from nitrided alloy steel for exceptional wear resistance.
- Intelligent Spiral Winding & Forming Unit: The heart of the machine features a precision winding head that spirally winds the extruded HDPE profile onto a mandrel. A synchronized vacuum calibration and cooling system instantly forms the corrugated outer wall and smooth inner wall, ensuring excellent dimensional accuracy and structural integrity.
- Fully Automated PLC Control: The entire production process is managed by a user-friendly PLC with a color touch screen HMI. Operators can monitor and adjust key parameters like temperature, speed, winding pitch, and vacuum pressure in real-time, ensuring repeatable quality and simplifying operation.
- Robust Construction & Stability: Built on a heavy-duty welded steel frame with reinforced bases for all major components, the machine offers remarkable vibration resistance and operational stability, which is critical for 24/7 production runs and achieving tight pipe tolerances.
- Energy-Optimized Design: Incorporates AC frequency conversion drives for the extruder, haul-off, and winding motors, significantly reducing power consumption. The segmented electric heating zones with PID temperature control minimize heat loss and improve thermal efficiency.
- Versatile Production Capability: The machine can be configured to produce a range of pipe diameters (commonly from DN/ID 200mm up to DN/ID 3000mm or more) with different ring stiffness classes (SN4, SN8, SN16), making it adaptable to various project specifications and market requirements.
Key Specifications Table:
| Parameter | Description / Typical Range |
|---|---|
| Applicable Material | HDPE (High-Density Polyethylene) Granules |
| Production Pipe Diameter (ID) | Customizable (e.g., 200mm - 3000mm) |
| Extruder Configuration | Single Screw or Parallel Twin Screw (Model Dependent) |
| Screw Diameter (Example) | Available in various sizes (e.g., 90mm, 120mm, 150mm) |
| Main Drive Power | AC Variable Frequency Drive |
| Control System | PLC with Color Touch Screen Interface |
| Heating Method | Resistance Heater with PID Control |
| Cooling Method | Water Spray / Vacuum Calibration Tank |
| Haul-Off System | Caterpillar Type with Synchronized Speed Control |
What This Means for Your Business:
- Enhanced Productivity: Achieve continuous, high-output production with minimal downtime, maximizing your return on investment and meeting large-scale order deadlines.
- Superior Product Quality: Produce pipes with consistent dimensions, high ring stiffness, and excellent surface finish, giving you a competitive edge in tenders and projects that demand reliable infrastructure materials.
- Reduced Operational Costs: The energy-efficient design and stable process control lower your per-meter production cost, while the durable construction minimizes maintenance expenses and extends the machine's service life.
- Operational Simplicity & Safety: The automated control system reduces reliance on highly skilled operators and enhances workplace safety through integrated monitoring and alarm functions.
- Market Flexibility: The ability to customize the machine for different pipe sizes and standards allows you to diversify your product portfolio and tap into various regional and application-specific markets.
Trust in a manufacturer with a proven global footprint. Operating from a modern facility spanning 10,000-30,000 square meters in Qingdao, our dedicated team of 51-100 professionals oversees every stage of manufacturing, from R&D to final testing. Our annual export value of US$1-1.5 Million to diverse markets including North America, Europe, Southeast Asia, and Africa is a testament to the reliability and acceptance of our machinery. We provide comprehensive support, from installation guidance and operator training to readily available spare parts, ensuring your production line runs smoothly for years. Contact Qingdao Yongke Machinery today to discuss how our HDPE Krah Pipe Extrusion Machine can become the reliable, high-performance core of your pipe manufacturing operations.
Frequently Asked Questions (FAQ):
-
Q: What is the main difference between a Krah pipe and a standard corrugated pipe?
A: Krah pipe refers to a specific manufacturing process (spiral winding) that creates a structured-wall profile. Our machine produces double-walled pipes with a corrugated outer wall for high ring stiffness and a smooth inner wall for excellent flow characteristics, which is superior to single-wall corrugated pipes for many drainage applications. -
Q: Can this machine use recycled HDPE material?
A: Yes, the machine is designed to process both virgin and certain grades of high-quality recycled HDPE granules. We recommend discussing your specific material blend with our engineers to ensure optimal machine configuration and screw design for your intended raw material mix. -
Q: How is the pipe diameter changed on this machine?
A: Pipe diameter changes typically require replacing the forming mandrel (core) and adjusting the winding head and haul-off system. Our machines are designed for such changeovers, and we provide detailed procedures and necessary tooling. The changeover time depends on the target diameter difference. -
Q: What is the typical production speed or output?
A: Output is measured in kilograms or meters per hour and varies significantly based on the target pipe diameter, wall thickness, and material. For example, a machine for DN/ID 500mm pipe may have a different output than one for DN/ID 2000mm. Specific output data is provided with the technical proposal for your required specifications. -
Q: Do you provide training for our operators?
A: Absolutely. We include comprehensive operational and basic maintenance training as part of our service. Training can be conducted at our factory during the FAT (Factory Acceptance Test) and/or at your site after installation by our dispatched engineers. -
Q: What after-sales support do you offer?
A: Our support includes a standard warranty period, remote technical assistance via phone/video, a detailed operation manual, and readily available spare parts. We maintain a stock of commonly worn parts for prompt shipment from Qingdao port. -
Q: Can the machine be customized for a specific national or project standard?
A: Yes, customization is a key service. We can adapt the machine design to produce pipes that comply with various international standards such as ASTM F2435, EN 13476, or specific national codes, including adjustments for required dimensions, stiffness classes, and testing protocols. -
Q: What utilities are required for installation?
A: The main requirements are a stable three-phase electrical power supply, a clean and sufficient water source for the cooling system, and a compressed air supply for pneumatic components. We provide detailed utility specifications (voltage, amperage, water flow/pressure) in the pre-sales technical documentation.
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