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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 Semi-Automatic Krah Profile Pipe Machine. Engineered for precision and reliability, this machine is designed to produce high-quality, large-diameter plastic pipes with integrated structural profiles, essential for demanding drainage, sewerage, and culvert applications. We understand the critical importance of material traceability in construction and infrastructure projects, which is why every machine we supply is backed by comprehensive Mill Test Reports (MTRs) for all key steel components, ensuring full compliance with your project specifications and quality standards. Our commitment to robust engineering and verifiable material quality provides our clients with the confidence and documentation needed for successful project execution and long-term asset performance.
This semi-automatic production line represents a significant investment in efficiency and quality control for pipe manufacturers. The "Krah" profile refers to a specific corrugated wall structure that provides exceptional ring stiffness and strength-to-weight ratio, making the pipes ideal for buried applications under high loads. Our machine meticulously forms this profile from extruded plastic, typically HDPE or PP, creating pipes that are both lightweight and incredibly durable.
Core Technical Features & Advantages:
- Precision Profile Forming: The heart of the machine features a series of meticulously calibrated forming molds and mandrels that shape the extruded plastic into the precise Krah profile. This ensures consistent wall thickness and profile geometry, which is critical for achieving the specified pipe stiffness (SN) class.
- Integrated Extrusion & Winding: The system seamlessly integrates the extrusion process with a winding mechanism. The extruded profile is spirally wound and fused together, creating a continuous, monolithic pipe structure with no weak seams.
- Advanced Control System: Operation is managed through a user-friendly PLC (Programmable Logic Controller) interface with a color touch screen. This allows for precise control over key parameters like winding speed, fusion temperature, and pipe diameter, ensuring repeatable quality batch after batch.
- Stable Temperature Management: A multi-zone digital temperature control system governs the heating elements for the extruder and profile fusion. This stability is crucial for achieving perfect molecular bonding between the wound profile layers, resulting in a pipe with excellent long-term integrity.
- Robust Mechanical Construction: Built within our 10,000-30,000 sqm facility, the machine frame utilizes heavy-duty steel sections. Critical components like gears, shafts, and bearings are sourced from reputable suppliers, and their material certifications are included in the Mill Test Report package.
Key Specifications & Performance Data:
| Parameter | Description / Range |
| Pipe Diameter Range | Typically from 500mm to 3000mm (Customizable) |
| Profile Wall Thickness | Adjustable, based on die design and SN class requirement |
| Main Drive Power | Configured based on pipe size and output target |
| Control System | PLC with Human-Machine Interface (HMI) Touch Panel |
| Cooling Method | Water Circulation System with Temperature Control |
| Machine Footprint | Varies with configuration; layout drawings provided |
Tangible Benefits for Your Business:
- Enhanced Product Quality: Produce Krah profile pipes with consistent dimensions and superior structural properties, meeting international standards for sewer and drainage systems.
- Operational Efficiency: The semi-automatic design optimizes the labor requirement, allowing skilled operators to manage multiple machines or focus on quality inspection, thereby improving overall productivity.
- Reduced Project Risk: The included Mill Test Report serves as a verifiable chain of custody for materials, simplifying compliance audits and providing assurance to your end clients, such as municipal authorities or engineering firms.
- Production Flexibility: With adjustable parameters, the machine can be set up to produce pipes of different diameters and stiffness classes, allowing you to cater to a wider market without major re-investment.
- Dependable Performance: The robust design and quality components, verified by our ISO 9001 quality management system, ensure high machine uptime and a long operational lifespan, protecting your capital investment.
Trust in a partner with a proven global footprint. Qingdao Yongke Machinery supports an annual export value of US$1-1.5 Million, delivering reliable machinery to markets across North and South America, Europe, Asia, Africa, and Oceania from the port of Qingdao. Our certifications, including ISO 9001, ISO 14000, and OHSAS 18001, are not just certificates on the wall; they are the framework for our manufacturing processes, guaranteeing that every Semi-Automatic Krah Profile Pipe Machine is built with systematic quality control, environmental responsibility, and workplace safety in mind. This machine is more than equipment; it's a foundation for your business growth in the critical infrastructure sector. Contact us today to discuss your specific pipe production requirements and receive a detailed proposal, complete with the material compliance documentation you need for success.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of the Krah profile compared to other pipe structures?
A: The Krah profile, a type of structured wall design, offers an excellent strength-to-weight ratio. It provides high ring stiffness, making the pipe resistant to deformation under soil and traffic loads, while using less material than a solid wall pipe of equivalent strength, leading to cost savings in material and transportation.
Q2: What does "semi-automatic" mean for this machine's operation?
A: A semi-automatic operation means core processes like profile extrusion, winding, fusion, and cutting are automated and controlled by the PLC. However, tasks such as loading raw material (plastic granules), initial setup for a new pipe size, and final quality checks are performed by an operator. This balance offers high efficiency with manageable complexity and cost.
Q3: What materials are documented in the provided Mill Test Report (MTR)?
A: The MTR typically covers the primary structural steel used in the machine frame, key mechanical components like shafts and gears, and sometimes major electrical parts. It provides chemical composition and mechanical property data from the original steel mill, verifying the material grade (e.g., Q235, 45# steel) meets specified standards.
Q4: Can this machine produce pipes for potable water applications?
A: The machine itself forms the pipe structure. The suitability for potable water depends on the raw plastic material (e.g., HDPE) used and its relevant certifications. Our machine can process food-grade resins, but the final pipe certification must be obtained by the producer based on the complete production process and material used.
Q5: What kind of after-sales support and training do you provide?
A: We provide comprehensive support including installation guidance (via remote video or engineer dispatch, available upon request), detailed operational and maintenance manuals, and training for your technicians on-site or at our factory. We also supply a standard set of spare parts and offer lifelong technical consultation.
Q6: How is the pipe diameter changed on this machine?
A: Changing the pipe diameter involves adjusting the winding carriage's travel path and potentially changing the forming mandrel or mold segments. Our semi-automatic system allows for these adjustments, which are detailed in the machine manual. The process requires skilled technicians but is designed for efficiency.
Q7: What is the typical lead time for such a machine?
A: The lead time varies based on the specific configuration and our production schedule. Generally, it ranges from 60 to 90 days after order confirmation. A more precise timeline can be provided once your technical requirements are finalized.
Q8: Do you offer customization for specific pipe standards or production rates?
A> Yes, customization is a key part of our service. We can engineer the machine to target specific production outputs (meters/hour) and tailor it to produce pipes that conform to various international standards like ASTM, EN, or ISO, based on your target market requirements.
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