Analysis of Mold Cost Proportion for Custom UHPC Components and Discussion of Influencing Factors

In the field of architectural decoration materials, mold costs are often a significant factor that cannot be overlooked in customized production. For new materials such as UHPC (Ultra-High Performance Concrete), which feature ultra-high strength, excellent durability, and exceptional formability, the proportion of mold costs in customized components directly affects a project's economics and feasibility. As an industry leader with 28 years of experience in detailed design and manufacturing of UHPC/GRC/GRG/GRP materials, Qinglong Group will provide an in-depth professional analysis of the composition and key influencing factors of mold costs for customized UHPC components, offering designers, owners, and industry peers a reference that combines technical depth with practical value.

I. Analysis of the Proportion of Mold Costs for Customized UHPC Components

In the total cost structure of customized UHPC components, mold fees typically account for 15%-30%, with the specific figure varying depending on project scale, shape complexity, and production processes. Take, for example, a shaped UHPC curtain wall project for a landmark building undertaken by Qinglong Group: its mold cost proportion reached 28%, mainly due to the high precision requirements that double-curved surfaces place on molds; whereas in UHPC garden bench projects with a higher degree of standardization, the mold cost proportion can be controlled at around 18%. This data both reflects the central role of molds in customized UHPC production and reveals the possibility of reducing project costs through optimized mold design and management. Compared with materials such as GRC (Glass Fiber Reinforced Concrete) and GRG (Glass Fiber Reinforced Gypsum), UHPC—owing to its good material flowability and high molding precision requirements—places more stringent demands on mold rigidity, surface finish, and durability, which is the fundamental reason its mold cost proportion is relatively high.

II. Key Factors Affecting the Mold Costs of Customized UHPC Components

1. Shape Complexity and Structural Design: The degree of shaping complexity is the primary factor affecting mold costs. Straight-line and simply curved components can use modular combined molds at relatively low cost, whereas customized components with double-curved surfaces, openwork reliefs, or super-large dimensions (e.g., length exceeding 6 meters) require molds for integral casting or precise segmented splicing, with design difficulty and material consumption increasing geometrically. Qinglong Group optimized component jointing through parametric design (Rhino+Grasshopper) and BIM technology, successfully reducing shaped mold costs by 12% in the translucent concrete project for the Century Plaza renovation on Nanjing East Road.

2. Mold Material and Process Selection: The choice of mold material directly determines cost and service life. Steel molds, although requiring high initial investment (about 3-5 times that of wooden molds), can be reused more than 50 times, making them suitable for large batches of standardized components; wooden molds (such as plywood) are low in cost but short-lived (3-5 uses), and are mostly used for small batches of shaped components; while GRP (fibreglass reinforced plastic) molds offer advantages in curved shape adaptability and surface texture rendering, and are commonly used for artistic sculpture UHPC components. Qinglong Group flexibly combines mold materials according to project characteristics; in the Dongguan Women and Children's Activity Center project, it adopted a "steel mold + partial GRP liner" process, achieving a balance between cost and effect.

3. Production Batch and Turnover Efficiency: The amortized cost of a mold is inversely proportional to the production batch size. When the production quantity of a given component specification exceeds 20 units, the unit amortized cost of steel molds can be lower than that of wooden molds. Qinglong Group established a standardized mold library to enable mold reuse for commonly sized UHPC decorative lines, sunshades, and other components, raising the average turnover count to 35 uses and effectively reducing overall costs. In addition, whether a mold is designed for quick disassembly, cleaning, and maintenance also affects production efficiency, indirectly increasing time costs.

4. Precision Requirements and Surface Treatment: The exposed surfaces of UHPC components are usually required to achieve a fair-faced concrete effect, requiring mirror polishing or coating treatment of the mold surface, which increases mold costs by 15%-20%. For components with special texture requirements (such as imitation stone or wood grain), engraving or film application on the mold surface is also needed, further driving up costs. Leveraging 28 years of process expertise, Qinglong Group's self-developed nano-scale mold coating technology guarantees surface precision while reducing mold maintenance costs by 8%.

III. Practical Approaches to Optimizing Mold Costs and Their Industry Value

Reducing the mold costs of customized UHPC components requires efforts across the entire chain, from design origination and production processes to supply chain management. As a national-level high-tech enterprise, Qinglong Group has achieved cost optimization through three major initiatives: first, promoting the concept of "parametric design + modular molds," breaking complex shapes down into standardized units—for example, in a UHPC exterior wall project for a commercial complex, 86 facade effects were created by combining 12 basic modules, reducing mold costs by 23%; second, establishing a mold-sharing platform to share mold resources for non-competing projects with industry partners (such as Shantaixin Industrial and Nanjing Beilida), improving the utilization rate of idle molds; third, developing new composite material molds, such as basalt fiber reinforced plastic molds, which cost 40% less than steel molds and can last more than 25 uses, and have been successfully applied in overseas projects in Southeast Asia.

Effective control of mold costs concerns not only a project's economics but is also key to the promotion and application of UHPC materials in the field of architectural decoration. With the mission of "creating beautiful architecture" and 28 years of accumulated full-chain experience, Qinglong Group deeply integrates technological innovation with cost optimization, providing designers with broader creative space and delivering premium projects for owners that combine artistic value with economic feasibility. In the future, with the development of new technologies such as 3D-printed molds and biodegradable molds, the mold costs of customized UHPC components will become further controllable, enabling this high-performance material to shine in more landmark buildings.