Zhixing Machine
Zhixing Machine
Pioneering precision manufacturing with industry-validated CNC profile equipment.
In modern architectural fenestration, the structural integrity of composite aluminum profiles hinges on the mechanical lock between the metal extrusions and the thermal barrier polyamide strips. The process of knurling—which involves using specialized serrated wheels to carve precise internal teeth in the aluminum extrusion channel prior to strip insertion and rolling—is the foundation of this composite bond.
As a global leader and Top China Knurling Machine For Thermal Break Supplier & Exporter, Shangdong Zhixing Intelligent Equipment Co.,Ltd. develops high-grade thermal break assembly machines that safeguard structural safety. By delivering an optimized, consistent tooth profile on the pocket inner walls, our systems guarantee that the finished composite profile achieves outstanding transverse and longitudinal shear strength values (in compliance with strict EN 14024 guidelines). This prevents profile displacement under wind load, seismic activities, and thermal expansion dynamics.
Shangdong Zhixing Intelligent Equipment Co.,Ltd. specializes in the production of aluminum and UPVC window and door processing machines, curtain wall machinery, and hollow glass equipment designed to meet diverse client requirements. We are dedicated to providing state-of-the-art products and solutions tailored to customer requests, offering bespoke customization services to elevate manufacturing efficiency.
As a recognized national high-tech enterprise, Zhixing Intelligent leads research and development for industrial aluminum and customized fenestration equipment. Our portfolio includes a new generation of intelligent workstations (drilling and milling saws), sawing centers, CNC machining centers, double-headed precision miter saws, and CNC end milling solutions.
For structural curtain walls and heavy-duty window profiles, the composite section must act as a single monolithic component. This behavior is evaluated under EN 14024 (thermal barrier profiles - performance requirements and tests). If the knurling is inconsistent, the PA66-GF25 (polyamide) strip can slide within the aluminum pocket, leading to catastrophic failure of the curtain wall facade under wind suction.
The knurling wheel cuts precise micro-teeth into the inner surface of the aluminum extrusion pocket. This plastic deformation creates deep ridges. During the subsequent rolling (crimping) stage, the aluminum profile teeth bite into the harder polyamide strip, creating a high-strength mechanical interlock.
Zhixing Intelligent’s knurling machines utilize highly specialized alloy knurling wheels. The pitch and tooth shape are calculated based on the alloy grade (e.g., 6063-T5 vs. 6063-T6) to prevent fracturing of the aluminum pocket flange while maintaining a high shear force threshold.
Modern architectural structures require profiles of varying pocket depths and shapes. Our machines feature electronic height and depth adjustments, enabling continuous, uniform knurling depth even on complex, asymmetrical window profiles.
| Parameter Class | Traditional Knurling Machines | Zhixing Intelligent CNC Knurling Systems | Impact on Profile Performance |
|---|---|---|---|
| Positioning Accuracy | Manual / Mechanical Crank | Digital Precision CNC Adjustment (≤ 0.05 mm) | Eliminates strip misalignment and reduces rolling reject rates. |
| T-Value (Shear Strength) | Unpredictable (20–40 N/mm) | High & Stable (≥ 80 N/mm, exceeding EN 14024) | Ensures high-rise curtain walls resist extreme wind loads. |
| Processing Speed | Fixed Speed (approx. 30m/min) | Variable Speed (up to 80m/min, VFD controlled) | Increases factory throughput to match rapid extrusion rates. |
| Knife Blade Durability | Standard carbon tool steel | Hardened premium alloy with TiN coating | Extends blade lifespans and maintains consistent tooth shapes. |
With international focus shifting toward net-zero buildings, regulations like the EU's Energy Performance of Buildings Directive (EPBD) and North America's Energy Star 7.0 standards have made thermal insulation in facades non-negotiable. Traditional solid aluminum profiles have been replaced by multi-cavity thermal break systems. This change has driven demand for high-efficiency assembly lines.
Architects are also designing increasingly complex facades, including double-skin walls, structural silicone glazing, and oversized triple-glazed windows. These layouts require thicker, wider polyamide strips (sometimes exceeding 50mm) and high-density polyurethane foam fills. Consequently, the mechanical connection between the metal and the insulation strip must withstand larger mechanical loads than ever before, making high-precision knurling a vital manufacturing step.
Zhixing Intelligent is committed to remaining at the forefront of profile assembly technology. Our future roadmap integrates digital intelligence and automated quality assurance into our physical machines.
Real-time optical sensors scan the knurled cavity to confirm tooth depth and pitch before the profile enters the strip-insertion stage.
Smart drives adjust wheel pressure dynamically, compensating for wall thickness variances in the extrusion.
Machine controllers sync with MES networks, logging production parameters for total product traceability.
Updated tooling profiles allow clean knurling on next-generation insulation materials, including glass-fiber-reinforced bio-polymers.
Each machine from Shandong Zhixing Intelligent Equipment Co., Ltd. is built for long-term reliability. Our manufacturing facilities are certified to ISO9001, CE, and SGS. With over 10 national patents, our engineering team continuously refines profile handling and processing systems, providing high value and reliable performance to window and door manufacturers globally.
Polyamide strips have a smooth surface, and extruded aluminum pockets are similarly smooth. Without knurling, the rolled assembly relies solely on friction, which cannot withstand shear stresses. Knurling cuts teeth into the aluminum, creating a secure mechanical lock that prevents movement under wind, structural loads, and temperature shifts.
Our machines use high-precision CNC controllers and high-grade alloy wheels with titanium coatings. Micro-sensors maintain constant hydraulic or pneumatic pressure, preventing structural inconsistencies caused by subtle variances in the aluminum extrusion wall thickness.
Low shear strength typically results from worn knurling wheels, insufficient knurling depth, or incorrect roller pressure during the crimping process. Choosing high-quality knurling machinery and performing regular quality audits ensures deep, clean teeth, resulting in stable shear strength values that easily exceed EN 14024 standards.
Yes, our systems feature adjustable axis clearances and multi-directional wheel positions. Operators can quickly adjust settings to accommodate different channel widths and geometries, allowing factories to process window profiles and large structural curtain wall systems on a single line.
Our design and manufacturing systems are certified to ISO9001, CE, and SGS. We hold more than 10 national utility patents, validating our engineering expertise and dedication to quality in the aluminum and UPVC profile processing industry.
Yes. As an OEM/ODM supplier, we customize our machines to meet specific profile drawings, factory layouts, and automation levels, providing tailored solutions for window, door, and curtain wall manufacturers worldwide.
Discover our broader range of industrial machinery for glass, PVC, and structural facade processing.
