How to Make Gold Bars

Gold bars are the foundation of global investment markets. This guide explains how to make gold bars using JUYI’s vacuum ingot casting machine — from weighing raw gold and casting in vacuum to logo stamping. The result: flawless bullion with smooth surfaces, accurate weight, and compliance with LBMA, COMEX, and other international standards.

Gold bars, also known as bullion, are one of the most recognized forms of gold investment worldwide. Producing high-quality gold bars requires precision, advanced equipment, and a reliable process to ensure each bar meets international trading standards. At JUYI, we provide professional gold bar casting solutions with our advanced Vacuum Ingot Casting Machine, designed to deliver smooth, flawless, and investment-grade bullion.

Process of Making Gold Bars

1.Weighing the Raw Materials

The process begins by accurately weighing pure gold or refined raw materials according to the required bar size and weight. Precision is key to ensure each bar meets standard specifications.

2.Loading into Graphite Molds

The pre-weighed gold is placed directly into specially designed high-purity graphite molds, which shape the bar during the casting process.

3.Vacuum Casting Process

The molds are then placed inside the JUYI Vacuum Ingot Casting Machine. With just one-click operation, the machine handles both smelting and casting in a single chamber.

The raw gold is melted under a full vacuum environment, preventing oxidation.
The molten gold flows directly into the graphite mold and solidifies, eliminating the need to transfer liquid metal.
This design makes the process safer, easier, and more efficient.

4.High-Quality Gold Bar Formation

Once cooled, the bars are removed from the molds. The result is bullion with:

Smooth, mirror-like surfaces
No porosity or air bubbles
Accurate weight and dimensions

5.Logo & Serial Number Stamping

Each gold bar is then stamped with a logo, hallmark, and unique serial number using a hydraulic logo stamping machine. This ensures traceability, authenticity, and compliance with the standards of major gold trading markets, including:

LBMA (London Bullion Market Association)
COMEX (Commodity Exchange, USA)
Shanghai Gold Exchange (SGE)
Dubai Gold & Commodities Exchange (DGCX)

Why Choose JUYI Vacuum Ingot Casting Machine

All-in-One Design – Smelting and casting take place in the same chamber.
Full Vacuum Process – Prevents oxidation, ensures purity, and improves surface quality.
Ease of Operation – One-button casting, safe and user-friendly.
Superior Quality Output – Mirror-like surface, no shrinkage, no porosity.
Market Standard Compliance – Bars produced meet LBMA, COMEX, SGE, and other global standards.

Gold Bars for Global Trading

With JUYI’s advanced gold bar casting solution, the finished bullion is immediately ready for the market after stamping. The bars comply with international standards, making them suitable for investment, storage, and trading across global exchanges.

Ready to produce investment-grade gold bars with precision and efficiency?
👉 Contact JUYI today to explore our complete gold bar casting solutions — including vacuum ingot casting machines, logo stamping presses, and full production support — and start creating bullion that meets the highest global standards.

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