Analysis of Mold Parting Principles and Key Technical Points for Complex GRC Shapes

The Perfect Balance of Form Artistry and Engineering Logic: A Complete Analysis of Complex GRC Mold Parting Technology

Driven by the dual forces of contemporary architectural aesthetics and engineering technology, GRC (Glass Fiber Reinforced Concrete) has become the preferred decorative material for high-end projects such as grand theaters, commercial complexes, and landmark buildings, thanks to its outstanding design freedom and structural performance. As an industry-leading enterprise with 28 years of full-chain experience in UHPC/GRC/GRG/GRP, Qinglong Group deeply understands the decisive role that complex GRC mold parting technology plays in a project's success. This article provides a systematic analysis of mold parting principles and key technical points, offering designers and engineering teams a complete workflow solution from concept to implementation.

I. Core Principles of Complex GRC Mold Parting: The Golden Rule of Balancing Artistry and Engineering

Mold parting design is the critical step in transforming GRC components from digital models into physical products, and its core lies in resolving the conflict between design complexity and production feasibility. Drawing on the practice of more than a thousand irregular-shaped projects, Qinglong Group has summarized three major principles. First is the principle of structural safety priority: mold parting must ensure that the self-weight and load conditions of each unit component comply with the Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Buildings (JGJ/T423-2018), with particular attention to the demolding angles and reinforcement design of double-curved and hollow-out structures. Second is the principle of production economy: modular mold parting reduces mold costs—for example, decomposing single-curvature shapes into standard unit components saves more than 30% compared with integral molds. Finally is the principle of controllable installation precision: mold parting must reserve precise joint nodes, which, combined with BIM technology, achieves millimeter-level error control—a technology already validated in the Nanjing East Road Century Square renovation project.

II. Key Technical Points: Full-Chain Control from Digital Design to Precision Manufacturing

In the parametric design phase, Qinglong uses the Rhino+Grasshopper platform for mold parting simulation, focusing on solving three major technical challenges. First, optimization of parting lines for complex curved surfaces: manifold segmentation algorithms allow the parting lines to blend naturally with the sculptural texture, avoiding visual fragmentation. Second, mold material selection: mold solutions are matched to different shape characteristics—single-curvature components use GRP (fiberglass) molds, while double-curved irregular components use high-precision silicone molds, ensuring surface precision of 0.1mm/㎡. Third, integrated design of embedded parts: the positions of stainless steel connectors are pre-set in the BIM model, solving the installation problems caused by embedded part misalignment in traditional mold parting.

In the production and manufacturing stage, Qinglong's original "pre-assembly verification method" effectively improves mold parting precision: before each component is produced, a 1:1 digital pre-assembly is carried out, error heat maps are generated through 3D scanning, and molds are corrected at any locations exceeding tolerances. In the Dongguan Women and Children's Activity Center project, this technology achieved a 100% pass rate for on-site joints of the double-curved GRC curtain wall. Meanwhile, for special shapes such as hollow-out and relief patterns, the "reverse mold parting method" achieves complete replication of complex textures, improving production efficiency by 40% over traditional processes.

III. Industry Practice and Technological Innovation: The Accumulation and Breakthrough of Qinglong's 28 Years of Experience

As a member of the International GRC Association and a participant in industry standard setting, Qinglong Group continues to innovate in mold parting technology: its independently developed flexible mold parting technology breaks through the shape limitations of traditional rigid molds, enabling the forming of complex components with a minimum radius of curvature of 300mm; meanwhile, the intelligent mold parting system uses AI algorithms to automatically optimize parting schemes, shortening the design cycle by 50%. These technical achievements have been successfully applied to international projects such as the Malaysia Twin Towers expansion project and the King's Library in Saudi Arabia, demonstrating the technical strength of Chinese GRC enterprises.

Mold parting technology for complex GRC shapes represents a deep integration of materials science, structural mechanics, and digital technology. With the mission of "creating beautiful architecture," Qinglong Group has built a complete technical system from design development to after-sales maintenance through 28 years of accumulated full-chain experience. In the future, with the development of UHPC/GRC composite technology, mold parting technology will advance toward greater intelligence and precision, providing solid engineering support for the unlimited possibilities of architectural art. Choosing a supplier with deep technical expertise is the key to turning complex shapes from drawings into reality.