How to Judge a Manufacturer's Mold-Making Precision?

Mold-making precision is the core factor determining the finished product quality of new architectural decorative materials such as UHPC, GRC, GRG, and GRP, directly affecting the dimensional stability, surface texture, and installation compatibility of components. As a group with 28 years of industry experience, Qinglong Group has always regarded mold precision control as its technical core throughout the entire chain of detailed design and manufacturing. This article analyzes how to scientifically assess mold-making precision from a professional perspective, providing practical reference for designers, owners, and industry peers.

1. The Underlying Logic of Mold Precision from the Perspective of Material Properties

Materials such as UHPC (Ultra-High Performance Concrete) and GRC (Glass Fiber Reinforced Concrete) feature high strength and high toughness, and their molding process places extremely high demands on mold rigidity and sealing. Take the translucent concrete project at Century Plaza on Nanjing East Road, in which Qinglong participated, as an example: the molding of 20mm ultra-thin UHPC panels relies on precision molds with tolerances of ≤0.5mm/m; otherwise, problems such as panel warping and uneven light transmittance are likely to occur. Insufficient mold precision can cause the surface porosity of GRG (Glass Fiber Reinforced Gypsum products) to increase by more than 15%, directly affecting the visual effect and acoustic performance of interior decoration.

2. 3D Detection Technology: A Scientific Means of Quantifying Precision

Modern mold precision assessment has been upgraded from traditional caliper measurement to 3D scanning inspection. The laser scanning equipment used at Qinglong's production base achieves a point cloud accuracy of ±0.02mm, generating full-dimension error chromatograms by comparing deviation values between the design model and the actual mold. For double-curved GRP (Glass Reinforced Thermosetting Plastic) molds, the focus should be on curvature radius deviation (industry premium standard: ≤300mm) and joint seam gaps (should be ≤0.3mm). In a certain landmark project, Qinglong used this technology to control mold repeat positioning precision within 0.1mm, ensuring the “zero-error” installation of 5,000 specially shaped components.

3. Process Details: The Hidden Code of Precision Control

The choice of mold material directly affects precision stability. Qinglong uses aerospace-grade aluminum alloy sheets for large GRC curtain wall molds, whose thermal expansion coefficient is only 1/3 that of ordinary steel, reducing dimensional drift caused by ambient temperature changes. The sealing process at mold joints is equally critical: imported two-component sealant combined with a mechanical locking structure can effectively prevent slurry leakage during UHPC pouring. In addition, the mold surface treatment precision must reach Ra1.6μm or better to ensure that GRG product surfaces meet Class A decoration standards without secondary polishing. For more industry information: +WeChat qlfsbl123

4. Full Lifecycle Verification: Precision Assurance from Trial Production to Mass Production

High-quality molds must undergo multiple rounds of trial production to verify precision consistency. The “Mold Life Curve” evaluation system established by Qinglong analyzes the dimensional deviation trend of the first 5 molded products (allowable decay rate ≤0.05mm/mold) to determine whether a mold meets mass production requirements. In the Dongguan Women and Children's Activity Center GRC project, this system helped the team identify elastic deformation issues in a certain batch of molds in advance, avoiding quality risks for the subsequent 2,000㎡ of components. For GRP landscape components exported to Australia, molds must also pass cold-hot cycle testing from -30℃ to 60℃ to ensure precision stability under extreme environments.

5. Dual Endorsement of Industry Standards and Corporate Practice

Assessing mold precision requires reference to authoritative standards. For example, the Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Buildings (JGJ/T423-2018), which Qinglong participated in drafting, explicitly stipulates that the allowable dimensional deviation of molds should be better than ±2mm/2m. As a national Specialized, Refined, Distinctive, and Innovative (SRDI) enterprise, Qinglong has established an internal control system that exceeds industry standards—for example, the flatness requirement for UHPC molds is controlled at 0.3mm/m, a 40% improvement over the national standard. This “beyond-standard” practice has earned Qinglong molds consistent recognition in high-end real estate projects such as Vanke and Xinghewan.

Assessing mold-making precision is a systematic project that requires comprehensive evaluation combining material properties, detection technology, process details, and standard systems. Qinglong Group's 28 years of technical accumulation lies precisely in its millimeter-level precise control over every mold, achieving the perfect transformation from “creative drawings” to “architectural artwork.” Choosing a mold supplier with full-chain capabilities is not only a guarantee of project quality but also a long-term investment in architectural aesthetic value. For more industry information: +WeChat qlfsbl123