Analysis of Mold Fabrication Precision Requirements and Key Control Points for Curved GRC Decorative Panels

Mold precision is the lifeline of curved GRC decorative panel quality; millimeter-level error control determines the dual delivery of both architectural aesthetics and structural safety.

In the field of modern architectural decoration, curved GRC decorative panels have become the material of choice for high-end projects such as grand theaters, commercial complexes, and landmark buildings, thanks to their unique curvilinear aesthetics and material advantages. As an industry leader with 28 years of experience in detailed design and production of UHPC/GRC/GRG/GRP materials, Qinglong Group fully understands the decisive role that mold-making precision plays in the final quality of curved GRC products. This article systematically analyzes the core technical points of curved GRC decorative panel mold making from three dimensions—mold design, material selection, and process control—providing the industry with solutions that combine theoretical depth with practical value.

I. Design Precision Control of Curved GRC Molds: Accurate Conversion from Drawings to 3D Models

The mold design of curved GRC decorative panels must be built on parametric modeling, achieving dual optimization of curve smoothness and structural strength through professional software such as Rhino and Grasshopper. Qinglong Group uses BIM technology to build 1:1 digital models, controlling design errors within ±0.5mm to ensure that mold surfaces closely match the architectural design intent. For small-curvature curved components with radii ≤300mm, special attention must be paid to mold segmentation design, using modular splicing technology to reduce seam errors—a process that has been validated in projects such as the Century Plaza renovation project on Nanjing East Road.

II. Mold Material Selection and Machining Processes: Key Decisions in Balancing Cost and Durability

The choice of mold material directly affects the surface precision and production efficiency of curved GRC products. Qinglong Group flexibly selects from three major material categories based on project requirements: fiberglass reinforced plastic (GRP), aluminum alloy, and steel molds. GRP molds are suitable for complex curved surfaces and can achieve a surface roughness of Ra≤3.2μm; aluminum alloy molds, with their lightweight advantage, are widely used in the production of standardized curved components; although steel molds involve higher costs, they demonstrate exceptional durability in the fabrication of extra-large curved GRC curtain wall panels (single panel area ≥10㎡). Five-axis machining centers are used in the machining process, ensuring that mold cavity dimensional tolerances are controlled within the GB/T 1804-m standard range.

III. Precision Monitoring During Production: Building a Full-Process Quality Traceability System

Precision control of curved GRC molds runs through the entire production cycle. Qinglong Group has established a closed-loop management mechanism of "3D scanning – stress testing – dynamic adjustment": before each batch of molds is put into use, full-dimensional inspection is carried out via 3D laser scanning, with focused monitoring of curvature deviation (allowable error ≤1mm/2m); during pouring, strain gauges are used to monitor mold deformation in real time, ensuring dimensional stability during concrete setting. In addition, RFID chips are embedded to achieve full life-cycle traceability of molds—a technology that has been applied in award-winning projects such as the Dongguan Women and Children's Activity Center.

As a participating unit in drafting the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong Group has always regarded mold precision control as the core competitiveness of its curved GRC products. From material selection to process innovation, from digital design to intelligent production, we adhere to millimeter-level precision standards, providing designers and owners with decorative solutions that combine aesthetic value with structural safety. In the future of architectural decoration, with the deep integration of BIM technology and intelligent manufacturing, curved GRC mold making will develop toward higher precision and greater efficiency, offering unlimited possibilities for architectural art creation.