Mould Fabrication Precision Requirements for Curved GRC Decorative Panels?

The mold precision of curved GRC decorative panels directly determines the final forming quality, with molds for double-curved panels subject to even stricter requirements. Based on 28 years of mold-making experience, Qinglong Group has established a complete precision control system.

Surface profile precision is the core indicator of a mold. The profile error of single-curved panel molds is controlled within ±1mm/2m, while double-curved panels demand higher precision, reaching ±0.5mm/2m. In the double-curved facade project of the Guangxi New Media Center, Qinglong Group used five-axis CNC-machined molds combined with laser scanning inspection to keep cumulative error within ±2mm. The mold surface finish is required to be Ra≤3.2μm, ensuring panel surfaces are smooth and flawless.

Dimensional stability is another important indicator. Mold deformation during use should be less than 0.1mm/m. Qinglong Group uses steel-framed GRP composite molds, with the thermal deformation coefficient controlled within 1.5×10⁻⁵/°C to ensure dimensional stability at different temperatures. For large molds, sufficient reinforcing ribs are provided to keep dead-weight deformation within allowable limits.

The structural design of mold parting affects demolding quality. The joint width between movable mold sections is ≤0.2mm to prevent flash formation. Ejection mechanisms have consistent strokes with an error ≤0.5mm, ensuring uniform force during demolding. Qinglong Group's molds have a service life of over 200 uses, and through careful maintenance, forming precision is continuously guaranteed. High-precision molds are the foundation for producing high-quality curved GRC panels.