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

Analysis of Mold Parting Principles and Key Technical Points for Complex GRC Shapes: Creating a Perfect Balance Between Architectural Aesthetics and Engineering Practice

In the field of contemporary architectural design, GRC (Glass Fiber Reinforced Concrete) has become an ideal material for realizing complex architectural forms, thanks to its excellent plasticity and structural performance. From the curved curtain walls of grand theaters to the irregular decorative elements of commercial complexes, the mold parting process of GRC materials directly determines the precision with which design creativity is realized as well as project economics. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group, drawing on the practice of more than a thousand complex projects, provides an in-depth analysis of the core principles and technical points of GRC mold parting, offering systematic solutions for designers and engineering parties.

I. Core Principles of GRC Mold Parting Design: Balancing Aesthetics and Production Logic

Complex GRC mold parting design must follow three core principles. The first is the principle of "shape integrity first": parting lines should be set along the natural texture or structural transition lines of the shape. For example, for double-curved components, the optimal parting surface should be determined through parametric analysis to ensure no visible joints after assembly. In a cultural landmark project in Nanjing, Qinglong Group used Rhino and Grasshopper software to simulate mold parting, dividing 12-meter-high twisted curtain wall panels into 16 unit modules and achieving millimeter-level assembly precision.

The second is the principle of "production feasibility": mold parting must take into account mold reuse rates in the factory and ease of demolding. For openwork relief GRC components, horizontal parting should be adopted to avoid undercuts, while the weight of a single mold piece should be controlled at ≤500kg to suit lifting equipment. In a GRG ceiling project for a commercial complex, Qinglong's technical team innovatively adopted a "modular nested parting method," increasing mold utilization by 40% and shortening the production cycle by 25%.

The last is the principle of "installation safety": mold parting must be combined with structural force analysis, with anchoring points set at parting joints to ensure that each GRC unit has independent load-bearing capacity. In a super high-rise project in Guangzhou, BIM technology was used to simulate the parting scheme, enabling the anchoring system of each curtain wall panel to work in perfect coordination with the main structure; third-party testing showed wind pressure resistance of 1.5kPa.

II. Key Technical Points: Full-Process Control from Digital Design to Intelligent Production

Parametric parting technology is the core breakthrough for complex GRC shapes. Qinglong Group's independently developed "GRC Mold Parting Optimization System" can automatically generate parting schemes through algorithms and simulate the material loss rate and installation efficiency under different parting methods. In an irregular landscape project in Shenzhen, the system compressed the parting scheme iteration cycle from the traditional 72 hours to 6 hours, raising material utilization to 92%.

Innovation in mold craftsmanship directly affects GRC product precision. For double-curved shapes, Qinglong adopts the "adjustable steel mold + flexible liner" technology, using CNC machining to ensure mold surface errors of ≤0.5mm/m. In the Dongguan Women and Children's Activity Center project, this process successfully achieved GRG decorative lines with a single curvature radius of 300mm, winning the Silver Award at the first GRC Construction Engineering Innovation Awards.

Joint treatment technology is key to ensuring the aesthetics of GRC. Qinglong's "invisible joint process," through pre-embedded adjustable connectors and special repair materials, controls joint width to 1-2mm, with surface flatness meeting the ±2mm standard measured with a 2m straightedge. This technology has been successfully applied to a GRP daylighting roof at an airport project in Malaysia, achieving seamless assembly of curved shapes covering nearly 10,000 square meters.

III. Full-Chain Service Guarantee: Integrated Support from Design Development to After-Sales Maintenance

As a national high-tech enterprise and a contributor to GRC industry standards, Qinglong Group has established a full-chain service system covering "design-production-construction-maintenance." In the design development stage, it provides one-stop technical support ranging from parting scheme optimization and structural calculations to mold design; the production process uses automated material distribution systems and steam curing to ensure product strength reaches above C80; in the construction stage, 3D laser scanning positioning technology is applied to achieve installation errors of ≤3mm.

For overseas projects, Qinglong's Malaysia production base can provide localized parting and production services, significantly reducing logistics costs and delivery cycles. In a commercial complex project in Saudi Arabia, the overseas parting production model shortened the delivery cycle of a 20,000㎡ GRC curtain wall to 45 days, earning high recognition from the owner.

The mold parting process for complex GRC shapes is a fusion of technology and art, requiring both a deep understanding of material properties and innovative application of digital tools. With 28 years of industry experience as its foundation, Qinglong Group continuously drives the iterative upgrading of GRC mold parting technology through ongoing R&D and project practice, providing a solid guarantee for architectural designers to bring their creativity to life. In the future, with the development of UHPC/GRC composite technology, the mold parting process will advance toward greater precision, economy, and sustainability, helping to create more architectural works that combine aesthetic value with engineering quality.