In the grand picture of the foundry industry, people's attention often focuses on precision sand casting, advanced die-casting processes, or investment casting of complex parts. However, at the most fundamental level of this manufacturing pyramid - the preparation of metal raw materials - a silent yet fundamental transformation is taking place. Ingot casting, which was once considered a "low tech" process, has now become a strategic location that determines the upper limit of the quality of the entire industry chain. In the field of precious metal ingots, every transformation from traditional handmade ingots to modern precision ingots has reshaped the underlying capabilities of China's jewelry industry, driving the industry from "rough" to "precision" and from "following" to "leading".

Traditional Ingot: The Foundation of the Handmade Era

Process form: manual crucible melting and casting, natural cooling forming; Gold ingots are mostly in the shape of boats or ingots, with a purity of about 99%.

Core limitations:

1.The fluctuation of purity and high impurity content directly affect the subsequent metal shaping effect and finished product color.

2.The internal looseness, shrinkage and segregation of the ingot are severe, resulting in low yield and high loss of precious metals.

3.The production efficiency is extremely low, making it impossible to achieve large-scale production. It can only adapt to traditional handmade jewelry techniques such as hammering, filigree, and wax casting.

Historical position: Established the core value foundation of China's jewelry industry based on "pure gold and pure silver", but the inherent technological bottleneck has become a key factor restricting the industry's scale and high-end upgrading.

Modern Transformation: Industrialization Begins

Equipment upgrade: Introducing intermediate frequency induction melting furnace and simple ingot casting machine, completely bidding farewell to the traditional manual crucible melting mode and entering the primary stage of industrial production.

Technological progress:

Purity improvement: Thousand foot gold (999 ‰) and ten thousand foot gold (999.9 ‰) have become mainstream in the market, gradually aligning with international precious metal purity standards.

Standardization of ingot form: Forming standardized gold ingots such as strip and plate shapes, which can be directly adapted to mechanical processing processes, laying the foundation for industrial scale production.

Remaining issues: The ingot still has problems such as oxidation, porosity, and rough surface; The production efficiency and accuracy are still insufficient to meet the production needs of high-end jewelry and lightweight products.

Modern Revolution: Precision Automation Ingot Casting

Qualitative changes in equipment and processes

Vacuum/inert gas protected ingots: By isolating air, zero oxidation and zero loss are achieved, resulting in mirror like gold ingots without shrinkage or segregation, greatly increasing material utilization from 88% to 95%.

Automated ingot casting machine: realizes mass production mode of one out four or more, adopts PLC one key control system, and can complete the casting of 4kg gold ingots in 15 minutes, increasing production efficiency by more than 10 times and reaching the international advanced equipment efficiency level.

Uniform organization: The internal organization of the ingot is uniform, and the hardness and toughness are synchronously improved, which can meet the strict performance requirements of high-end jewelry processing and completely solve the industry pain point of easy deformation of finished products.

Casting is often referred to as the 'mother of industry', and ingots are the 'source of qi and blood' for this' mother '. As Chinese manufacturing transitions to high-end fields, the performance requirements for basic materials are becoming increasingly stringent. The "basic skills" of the ingot casting process have never been as crucial as they are today.

Against the backdrop of the continuous rise in global prices of precious metals such as gold and silver (as of March 4, 2026, London spot gold prices reached $5159.42 per ounce), domestically produced high-end precious metal ingot equipment represented by Yihui is highly sought after in the global market. This phenomenon marks the transition of China's foundry industry from the "macro era" of pursuing scale and shape to the "micro era" of accurately balancing market demand and product performance. This silent revolution that occurred at the forefront of casting, although not noisy, fundamentally determines how fast and far China's high-end manufacturing industry can go.

This is not only an upgrade of equipment, but also a comprehensive upgrade of industrial strategy and market layout: only by building the strongest foundation can we support the most outstanding heights. Yihui is pouring a more solid and uniform development foundation for itself and the Chinese casting industry in the flames of remelting precious metals and the mist of cooling water, helping the global jewelry industry achieve higher efficiency, better quality, and more sustainable development, and writing a new chapter for China's casting technology to lead the world.

Yihui Casting Technology Co., Ltd. was established in 2003. After more than 20 years of accumulation, Yihui has now developed into a national high-tech enterprise that integrates research and development, production, sales, consulting, installation, and training of lost wax casting equipment, and provides one-stop solutions for metal casting. Yihui Casting Technology products include metal casting equipment, casting wax, graphite products, quartz products, etc., which are exported to Southeast Asia, the Middle East, Europe, America and other regions. The company has its own R&D team, which independently develops and produces automated vacuum die-casting machines, G20 vacuum bead scattering machines, and intelligent system D3 vacuum pressure casting machines, breaking the industry's long-standing dependence on imported high-performance jewelry equipment.

For more information about Yihui Casting Technology Co., Ltd., please visit our official website or contact our team.website: www.yihuicasting.com      email : info@yihuicasting.com     whatsapp : +86-13802830498