What Are the Production Challenges of Hollowed-Out GRC Decorative Panels? Qinglong Group's Practices in Precision Control and Structural Innovation

The production difficulties of openwork GRC decorative panels center on three major technical bottlenecks: "mold-making precision, fiber distribution uniformity, and demolding success rate." For panels with an openwork rate >30%, the industry average yield is only 60-70%. Through 28 years of technical breakthroughs, Qinglong Group developed the "integral casting - segmented vibration - vacuum dewatering" process in the Shanghai Century Plaza openwork carved panel project, raising the yield of complex openwork panels to over 95%. We use glass fiber reinforced polyurethane molds (service life ≥300 uses), robotic directional fiber spraying (fiber density at openwork edges increased to 5%), and a modular demolding system, successfully producing artistic panels with an openwork rate of up to 50% and a minimum openwork width of 3mm, achieving the unity of artistic expression and structural safety.

Mold Precision Is the Primary Challenge

Openwork molds must ensure rib width consistency (tolerance ±0.2mm) and draft angle (≥3°). Qinglong Group introduced five-axis CNC machining centers with mold positioning precision of ±0.1mm. In the Wuhan Han Show Theater openwork panel project, injection ports were optimized through simulated runner analysis to avoid fiber accumulation. The mold surface is sprayed with a Teflon coating, reducing demolding force by 40%.

Fiber Distribution Affects Structural Integrity

Openwork areas are prone to fiber discontinuity. We use a combined vibration + vacuum process to achieve fiber uniformity of ≥92%. Fiber content in edge reinforcement zones is increased to 4%, with flexural strength reaching 12MPa. Qinglong Group's patented fiber guiding technology ensures effective reinforcement in stress concentration areas.

Demolding Technology Determines Yield

A segmented ejection system is designed, demolding the large surfaces first and the fine details later; demolding is performed when curing strength is controlled at 15-18MPa to avoid brittle fracture. In the Shenzhen Yirui Biotechnology Building project, these measures increased openwork panel production efficiency by 50%. Overcoming these difficulties requires lean management throughout the entire process.