What Is the Mold Cost Share for Custom UHPC Components?

In the total cost composition of customized UHPC components, the proportion of mold cost is a highly variable figure, ranging from 10% to 50% or even higher, depending mainly on three major factors: "component complexity, production batch quantity, and mold material and process." Based on extensive experience with customization projects, Qinglong Group can offer a general rule: for artistic components with extremely complex shapes and very small production quantities (such as a single piece or just a few pieces), mold cost is often the largest share of the total cost; whereas for standardized components of medium complexity produced in reasonable batches, the proportion of mold cost drops significantly.

The core reason for the high proportion of mold cost lies in UHPC's extremely high demands on mold precision and strength. To perfectly render complex curved surfaces, sharp lines, or fine textures, and to withstand the high viscosity of low water-binder ratio UHPC mix and the thermal stress of the steam curing process, custom molds typically require five-axis steel molds CNC-machined to high precision or high-strength resin molds. For example, the large textured steel mold developed to produce light-transmitting wood-grain-effect UHPC panels for the Shanghai New World Century Plaza project cost as much as several hundred thousand yuan per set. If such a mold were used to produce only a few dozen square meters of special components, the amortized mold cost per cubic meter of components would be staggering—possibly exceeding the sum of material and production costs.

Conversely, if the component design incorporates a certain degree of standardization and repetition, mold cost can be effectively amortized. Qinglong's strategy is to communicate actively with architects during the project's detailed design phase and, while meeting the overall artistic effect, to optimize component segmentation through parametric design, striving to create rich facade effects by combining a limited variety of modules through rotation, mirroring, and other means. For example, in the doubly curved curtain wall project of the Nanning New Media Center, through algorithmic optimization we consolidated the theoretically over a thousand panels of different curvatures into fewer than two hundred standard panels, which greatly increased the production quantity per mold set and kept the proportion of mold cost at around 20% of the total price—achieving the optimal balance between economy and artistry. Therefore, one of the keys to controlling customized UHPC costs lies in front-end design optimization and batch planning.