What Are the Mold Parting Principles for Complex GRC Shapes? A Guide to Mold Division Techniques and Manufacturability Optimization

Parting design for complex GRC shapes is a key step in balancing artistic expression with manufacturing feasibility, directly affecting production costs, demolding success rates, and component integrity. Based on experience with complex-shaped projects such as the Wuhan Han Show Theater and Hainan Changying Global 100 Paradise, Qinglong Group has summarized three major parting principles: "demolding without negative angles, module standardization, and invisible seams." Through scientific parting design, mold costs for complex shapes have been reduced by 30% and production efficiency increased by 40%, providing technical assurance for the mass production of irregular GRC components.

Demolding without negative angles is the primary parting principle. Software analysis of the shape's draft angles (generally ≥3°) ensures smooth demolding. In a tree-shaped column project for a tourist complex in Guizhou, Qinglong Group adjusted the orientation of the parting surfaces, optimizing the 27 negative-angle areas in the original design into positive angles throughout, raising the demolding success rate to 99%. Module standardization reduces the variety of molds, for example by discretizing free-form surfaces into repeatable standardized units. In an art center project in Shenzhen, parametric design consolidated 196 irregular panels into 12 standard modules, reducing the number of molds by 70% and significantly lowering costs.

Invisible seams enhance aesthetics. Parting lines should be placed in visually weak areas or at natural transitions wherever possible. Qinglong Group uses high-precision CNC machining for mold joint surfaces, achieving seam widths of ≤0.1mm, leaving virtually no trace after casting. For oversized components, parting design must also account for transportation limits, with single-piece dimensions typically kept within 3m×3m. By following these principles, complex GRC shapes can be produced efficiently and with high quality.

Parting design should be involved early and optimized collaboratively with architects. Qinglong Group uses BIM technology to simulate the entire manufacturing process in advance, resolving manufacturability issues ahead of time. Scientific parting design brings bold, imaginative designs to perfect realization.