What Proportion of the Total Cost Is the Mould for Hollow-Out UHPC Shapes? Cost Composition and Optimization

The mold cost for hollow-out UHPC designs accounts for 15%-35% of the total project cost, primarily influenced by the hollow-out rate, design complexity, and batch size. The higher the hollow-out rate, the more complex the design, and the smaller the batch, the higher the proportion. Through mold reuse, digital machining, and large-scale production, Qinglong reduces this proportion by 5-10 percentage points below the industry average.

I. Mold Cost Proportion Standards for Different Scenarios

The proportion varies dynamically with project characteristics. Conventional hollow-out (hollow-out rate 20%-30%): regular design, reusable molds, accounting for 15%-20% of the total cost; Qinglong's batch orders (≥100 ㎡) can be as low as 15%. Moderate hollow-out (hollow-out rate 30%-50%): more complex design, partially custom molds, accounting for 20%-25%; Qinglong's modular design keeps the proportion at around 20%. High hollow-out (hollow-out rate above 50%): complex design, fully custom molds, accounting for 25%-35%; Qinglong's Algeria hotel project (hollow-out rate over 50%) had a proportion of 28%. Artistic hollow-out (carving + high hollow-out): unique design, non-reusable molds, accounting for 30%-35%; Qinglong's Nanning Liyuan Hotel colored carved design had a proportion of 32%. Batch impact: when the batch is ≥500 ㎡, the proportion drops by 5-8 percentage points; Qinglong's large-scale production compresses the proportion of batch projects to 15%-25%.

II. Key Factors Affecting Mold Cost Proportion

Three major factors dominate the proportion. Hollow-out rate: for every 10% increase in the hollow-out rate, mold cost rises by 5%-8% due to the need for more precise mold structures; Qinglong optimizes hollow-out patterns through parametric design to reduce mold machining difficulty. Design complexity: whether the hollow-out pattern is regular, whether there are double-curved shapes, and the number of joint nodes; Qinglong's simple geometric hollow-out has a proportion 10 percentage points lower than artistic carved hollow-out. Mold material: polyurethane molds (suitable for complex designs) cost 30% more than steel molds (suitable for batches), but steel molds require a large initial investment and are not cost-effective for small-batch projects; Qinglong selects materials as needed to balance costs. Batch size: the smaller the batch, the higher the amortized mold cost; Qinglong's 100 ㎡ small-batch projects have a proportion of 25%-30%, while 500 ㎡ large-batch projects have 15%-20%.

III. Qinglong's Mold Cost Optimization Strategies and Project Practice

The proportion is reduced from multiple dimensions to ensure cost-effectiveness. Mold reuse: molds for conventional hollow-out patterns are stored in inventory for reuse in subsequent projects; Qinglong's mold library exceeds 1,000 sets with a reuse rate of 40%. Modular design: hollow-out designs are split into standard modules + custom modules, with standard module molds reused; Qinglong achieves a modularization rate of 50% for complex designs. Digital machining: five-axis engraving + 3D scanning replication increase mold machining efficiency by 30% and reduce cost by 20%; Qinglong's digital machining saves 15%-20% on mold costs. Project cases: the Ouargla hotel in Algeria (hollow-out rate over 50%, batch of 500 ㎡) had a mold cost proportion of 28%, 7 percentage points below the industry average; the Nanning Liyuan Hotel colored hollow-out carving (batch of 100 ㎡) had a proportion of 32%; through mold reuse, the proportion of subsequent similar projects dropped to 25%. Qinglong's advantages: providing customers with cost optimization solutions, with mold cost proportions of ≤20% for conventional hollow-out projects, ≤30% for complex hollow-out, and ≤25% for batch projects, minimizing the total project cost.