Surface Flatness Control of Double-Curved GRC Panels: Full-Process Precision Control from Forming to Installation

The surface flatness of double-curved GRC panels directly affects a building's aesthetic appearance and structural sealing, making it a core indicator of engineering quality. Leveraging 28 years of technical expertise, Qinglong Group has established a full-process flatness control system covering mold fabrication, component forming, and on-site installation, achieving an industry-leading standard of surface flatness deviation ≤2mm/2m across thousands of projects in China and abroad.

High-precision molds are the fundamental guarantee of flatness control. The curved-surface characteristics of double-curved GRC panels place extremely high demands on mold precision. In the Dongguan Women and Children's Activity Center project, Qinglong used CNC-machined GRP molds and inspected mold surface precision through 3D scanning technology, ensuring mold curvature deviation ≤0.3mm/m. At the same time, modular mold design was adopted to reduce the impact of joint seams on the panel surface, laying the foundation for the surface flatness of double-curved GRC panels.

Optimized forming processes enhance the surface quality of components. Qinglong adopts a “layered spraying + vacuum dewatering” process in production. In the production of 15mm-thick double-curved GRC panels for the Wuhan Han Show Theater, precise control of spraying pressure and fiber distribution prevented surface defects such as air bubbles and pitting. In addition, a combination of mechanical grinding and manual fine finishing was used to perform three rounds of grinding on the panel surfaces, ensuring a smooth, flat surface that meets design requirements.

Leveling technology during the installation phase safeguards the final result. Cumulative errors during the installation of double-curved GRC panels can affect overall flatness. In the Shenzhen Pingshan High-tech Zone Comprehensive Service Center project, Qinglong adopted an “overall first, then local” leveling strategy, using 3D laser scanners to monitor installation accuracy in real time and adjusting panel positions one by one through adjustable supports. For joint seams, dedicated leveling mortar was applied to ensure smooth, flush transitions without noticeable height differences.

As a participating enterprise in the revision of the industry standard “Glass Fibre Reinforced Cement (GRC) Decorative Products,” Qinglong has incorporated surface flatness control technology into its corporate quality system, ensuring that every double-curved GRC panel meets high standards through strict factory inspection and on-site acceptance. Supported by a provincial-level R&D center, Qinglong continuously optimizes production processes and develops new mold materials and forming technologies to steadily improve the surface quality of double-curved GRC panels. Choose Qinglong for double-curved GRC panel products and services that combine aesthetic refinement with precise accuracy.