Analysis of Differences in Mold Requirements Between UHPC Single-Curved and Double-Curved Panels and Discussion of Key Technologies

In the field of architectural decorative materials, UHPC is becoming a key material for shaping architectural artistry with its excellent mechanical properties and molding potential. As common forms in UHPC applications, single-curved panels and double-curved panels differ in mold requirements, which directly affects product precision and project implementation efficiency. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group will provide an in-depth analysis of the technical differences between the two from the dimensions of mold design, process difficulty, and cost control, offering professional reference for designers and owners.

I. UHPC Single-Curved Panel Molds: Balancing Standardization and Economy

Due to their single curvature and relatively regular shapes, UHPC single-curved panels require mold designs that emphasize standardization and mass-production efficiency. Their molds are typically made of steel or glass fiber reinforced plastic (GRP), achieving precise forming through CNC machining. Take, for example, the exterior wall project of a commercial complex undertaken by Qinglong Group: single-curved panel molds can achieve over 90% commonality through modular design, shortening the production cycle by 30% compared with custom molds and effectively reducing project costs. In terms of key technical points, single-curved panel molds must focus on controlling the draft angle (usually ≥3°) and surface finish (Ra≤3.2μm) to ensure concrete flowability during pouring and flatness after forming.

II. UHPC Double-Curved Panel Molds: Tackling the Technical Challenges of Complex Shapes

The spatial complexity brought by biaxial curvature places higher demands on the design and manufacture of double-curved panel molds. In the translucent concrete project at Century Plaza on Nanjing East Road, Qinglong Group employed parametric design (Rhino+Grasshopper) and 3D scanning technology to achieve mold surface errors of ≤1mm. Compared with single-curved panel molds, double-curved panel molds must solve three core problems: first, material selection, where aluminum alloys or carbon fiber composites are often used to balance strength and lightweight properties; second, support structure design, where finite element analysis is used to optimize the stress distribution of the mold and prevent deformation during pouring; third, demolding technology, where segmented demolding and vacuum adsorption techniques are innovatively adopted to reduce the demolding risk of complex curved surfaces.

III. Key Technical Differences: A Full-Chain Comparison from Design to Production

In the detailed design stage, single-curved panels can rely on 2D drawings to complete mold machining, while double-curved panels require the creation of 3D digital models for collision detection and manufacturability analysis. In production, single-curved panels are suitable for assembly-line operations; Qinglong Group's automated production line can achieve a daily output of 300㎡. Double-curved panels, however, require customized production, with each component requiring individual adjustment of mold parameters, resulting in a production cycle approximately 2-3 times that of single-curved panels. In terms of cost, double-curved panel mold expenses can account for 15%-20% of the total project cost—3-5 times that of single-curved panels—so cost reduction must be achieved through optimized structural design (such as split-and-combined molds).

IV. Qinglong's Full-Chain Advantages: Technical Assurance from Mold to Project Implementation

As a national high-tech enterprise and a participant in setting UHPC industry standards, Qinglong Group possesses full-chain service capabilities from detailed design to after-sales maintenance. In mold technology, backed by the 3D printing and reverse engineering technologies of its provincial-level R&D center, it can quickly respond to complex shape requirements; on the production side, BIM technology is adopted to achieve digital management of molds and components, ensuring dimensional accuracy; in construction, 3D laser scanning positioning enables "zero-error" installation. To date, Qinglong has completed the production of over 600,000 square meters of UHPC/GRC/GRG/GRP components, with double-curved projects covering landmark buildings such as the Guangzhou Opera House and the Nanning Convention and Exhibition Center, fully demonstrating its technical strength.

Whether it is the efficient mass production of single-curved panels or the artistic expression of double-curved panels, mold technology is the core guarantee of UHPC product quality. Building on 28 years of industry experience, Qinglong Group continues to provide designers with solutions that bring "creative ideas to life" through technological innovation and lean management, injecting more possibilities into the architectural decoration industry. In the future, with the in-depth application of digital and intelligent technologies, UHPC mold technology will develop toward greater precision, economy, and environmental friendliness, promoting the deep integration of architectural aesthetics and engineering technology.