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17
2025
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09
Turnkey Solutions for Ceramic and Granite Coating on Cookware
Author：
Chuangzhi Coating
In the cookware market, ceramic and granite coatings have become mainstream choices due to their non-toxic, non-peeling, wear-resistant and scratch-resistant properties. However, these coatings have extremely high requirements for the coating process—needing precise control of coating thickness (usually 30-50μm), ensuring uniform surface without sagging, and adapting to the irregular structures of various cookware such as frying pans, soup pots and woks. As a coating line equipment manufacturer, we have developed the "Turnkey Solutions for Ceramic and Granite Coating on Cookware" to meet the needs of cookware enterprises, realizing full-process automation from blank pretreatment to finished product inspection, and adapting to the coating production of cookware made of different materials (aluminum alloy, cast iron).
1. Full-Process Technology Adaptation to Cover the Needs of Various Cookware
The film-forming characteristics of ceramic and granite coatings are significantly different: ceramic coatings require high-temperature curing (200-220℃) to enhance adhesion, while granite coatings need precise control of color paste ratio to restore stone texture. Our turnkey solution adapts to both types of coatings through modular process design: in the pretreatment stage, degreasing and passivation modules are set for aluminum alloy cookware, and derusting and phosphating processes are added for cast iron cookware to ensure tight bonding between the coating and the substrate; in the spraying stage, high-precision electrostatic spray guns are equipped—for ceramic coating, the atomization pressure is controlled at 0.3-0.5MPa; for granite coating, dual-gun synchronous spraying (base material + color paste) is used to restore texture, avoiding uneven color spots.
At the same time, the solution adapts to the structures of various cookware: for the flat surface of frying pans, a translational spraying trajectory is adopted; for the curved side walls of soup pots, 360° surrounding spraying is realized by robotic arms; for the deep-cavity design of woks, retractable spray guns are added to reach the bottom of the cavity, ensuring no spraying dead ends and meeting the production needs of enterprises' multi-product lines.
2. Fully Automated Production to Improve Efficiency and Coating Consistency
Traditional cookware coating line relies on manual operation, which easily leads to coating thickness deviation (more than ±10μm) due to hand shaking, and low production efficiency (daily output of a single line is less than 500 pieces). Our turnkey solution solves these pain points through a fully automated system: from blank loading to finished product unloading, all processes are connected by conveyor lines without manual intervention; in the spraying stage, a laser thickness gauge is used to monitor the coating thickness in real time, and when the deviation exceeds ±3μm, the spray gun parameters are automatically adjusted to ensure that the coating thickness consistency of cookware in the same batch reaches more than 99%; in the curing stage, a segmented drying oven is used—for ceramic coating, a curing section of 200℃/30min is set, and for granite coating, a curing section of 180℃/25min is set to avoid texture deformation caused by high temperature, while increasing the drying efficiency by 40%.
In addition, the solution integrates an MES production management system, which can count production capacity in real time and monitor equipment status. The daily output of a single automated production line can reach 1500-2000 pieces, which is 3-4 times higher than that of traditional manual lines, significantly reducing the unit production cost.
3. Dual Guarantee of Environmental Protection and Quality to Meet Industry Standards
Cookware coatings are in direct contact with food and must comply with food safety standards (such as FDA, GB 4806.10), and the production process must meet environmental protection requirements. Our turnkey solution strengthens guarantees in two aspects: in terms of environmental protection, a solvent-free coating supply system is adopted—the VOCs content of ceramic/granite coating is ≤100g/L, and equipped with activated carbon adsorption + catalytic combustion device, the waste gas treatment efficiency reaches 99%, complying with national air pollution emission standards; in terms of quality, an online detection module is set up—high-definition cameras are used to detect surface defects of coatings (sagging, pinholes), and unqualified products are automatically rejected. At the same time, finished products must pass wear resistance test (no coating peeling after 5000 rubs) and salt spray resistance test (no rust after 48 hours) to ensure compliance with food safety and durability requirements.
After a cookware enterprise introduced this turnkey solution, the defective rate of ceramic-coated cookware dropped from 8% to 1.2%, the production efficiency of granite-coated cookware increased by 3 times, and it passed the environmental protection acceptance, successfully entering the European and American markets, which verifies the practical value of the solution.
Conclusion
For cookware enterprises, the quality and production efficiency of ceramic/granite coatings directly determine market competitiveness. Our turnkey solution helps enterprises achieve large-scale and high-standard production, reduce operating costs, and seize the opportunity in the high-end cookware market through full-process technology adaptation, fully automated production, and dual guarantee of environmental protection and quality. In the future, we will continue to optimize equipment performance, adapt to the market demand for healthy coatings, and provide more targeted customized solutions.
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