TAEANTECH Fully Automatic Gold Bar Making Machine

About Taeantech Fully Automatic Gold&Silver Bar Tunnel Furnace

Taeantech leads the technological development of the gold and silver bar casting industry. To meet the customers' demands for large-scale and rapid casting of gold and silver bars, Teaentech factory independently developed and designed the fully automatic gold and silver bar tunnel furnace, model TA-AGF. This machine can cast a one-kilogram gold bar in one minute. It can work continuously for 24 hours and has a daily gold bar output of over one ton. The working efficiency of one Taeantech fully automatic gold bar tunnel furnace is equivalent to that of three box-type vacuum ingot casting machines, and it can fully meet the ingot casting requirements of large mining companies and gold bar companies.

Part 1: Feeding Mechanism
Part 2: Melting Room
Part 3: Discharging Mechanism


Part 1: Feeding Mechanism

The feeding mechanism is a very important part of the fully automatic gold bar tunnel furnace. From the loading of gold particles into the mold to the mechanical arm pushing the mold to the melting room, the entire process is automatically completed by PLC control, avoiding contamination (such as fingerprints and dust) or operational errors caused by manual contact, and improving the purity and consistency of the product.

The robotic arm: It adopts a high-precision servo drive system as the core actuating component. The robotic arm achieves precise placement of graphite molds through propulsion motion. Its structural design takes into account both strength and flexibility, and can be adapted to graphite molds of different sizes and shapes. The high-rigidity structure and low-inertia design reduce vibration during movement, making it particularly suitable for scenarios with extremely high requirements for surface finish in precious metal processing, preventing gold particles from spilling or mold damage due to vibration.

Stainless steel conveyor belt: The conveyor belt is made of 304 stainless steel, which has excellent corrosion resistance and is suitable for high-temperature environments. It has a moderate cost and is a common choice for conveyor belts in gold bar tunnel furnaces. Its chromium content is ≥18% and nickel content is ≥8%, forming a dense oxide film that resists corrosion by oxygen, water vapor and weak acids and alkalis. The conveyor belt adopts a servo drive system to achieve continuous and high-speed transmission, which is suitable for the full-process rhythm matching of gold bars from raw material entry into the furnace to finished product exit. For example, a single line can handle hundreds of kilograms of gold bars per hour, meeting the demands of large-scale production. Visual positioning system: It adopts high-resolution industrial cameras and combines sub-pixel-level image processing algorithms to achieve a positioning error of ≤±0.05mm, which is suitable for precise operations such as gold bar insertion into molds and melting room docking. For instance, during the docking process in the melting room, the system can precisely identify the center coordinates of the mold and guide the robotic arm to place the gold particle mold with an accuracy of 0.1mm.

The feeding mechanism of the fully automatic gold bar tunnel furnace has established a closed-loop automated system of "perception - decision-making - execution - optimization" through the high-precision perception of the visual positioning system, the precise execution of the mechanical arm and the efficient transmission of the conveyor belt. This system not only realizes the millimeter-level precise transmission and operation of graphite molds in high-temperature environments, but also promotes the development of precious metal processing towards "fully unmanned, intelligent and green" through intelligent algorithms and big data analysis.

Part 2: Melting Room

The fully automatic gold bar tunnel furnace melting room, as the core unit of precious metal processing, shoulders the crucial mission of transforming gold bars from solid to uniform liquid. Its design deeply integrates the latest achievements in materials science, thermal engineering, automatic control and intelligent algorithms. It features high-temperature tolerance, precise temperature control, high efficiency and energy conservation, intelligent collaboration, safety and environmental protection, and has become a key technical support for promoting the development of gold bar processing towards full automation.

IGBT induction coil heating: When alternating current passes through the induction coil in the fully automatic gold bar tunnel furnace, an alternating magnetic field is generated around the induction coil. The magnetic field generates eddy currents inside the metal raw material, thereby achieving heating. This heating method enables metals to reach the required temperature more quickly, reduces energy consumption and enhances production efficiency. Compared with traditional heating methods, IGBT induction coil heating technology has lower energy consumption. Combined with the high efficiency and high stability of IGBT, the waste gas and waste residue produced by precious metals during the heating process are relatively less, which helps to reduce environmental pollution.

PID ± 1℃ temperature control: PID temperature control technology continuously monitors and adjusts the temperature of precious metals heated in the smelting room through advanced internal sensors and processors, ensuring that the temperature remains stable within the preset ideal range. This precise temperature control is crucial for gold bar casting, as temperature is one of the key factors affecting the quality and performance of gold bars. The PID temperature control of the Taeantech AGF fully automatic gold bar tunnel furnace is precise, with a range of ±1℃. The temperature control range of most ingot casting machines on the market is ±5℃ to ±15℃. Therefore, the gold bars produced by the Taeabtech AGF fully automatic gold bar tunnel furnace present a mirror-like appearance, with no color segregation, no defects, and uniform and beautiful fineness.

Segmented temperature control technology: Segmented temperature control design is a key technology in the collaborative operation of the fully automatic gold bar tunnel furnace's feeding mechanism and smelting room. Its core lies in achieving precise heating of metals from solid to liquid state through multi-zone independent temperature control, temperature gradient control, and intelligent algorithm optimization, while ensuring equipment safety and energy efficiency. The interior of the melting room is divided into the preheating zone, the melting zone and the heat preservation zone, and the temperature of each zone is independently regulated. For instance, the preheating zone is gradually heated to 500℃, the melting zone is maintained at a high temperature of 1200℃, and the holding zone is slowly cooled to 800℃ to prevent the metal from cracking due to sudden temperature changes.

Inert gas protection: Inert gases have stable chemical properties and are not prone to react with precious metals. During the smelting process, inert gas fills the smelting room, isolating oxygen and gaseous impurities in the air to prevent metal oxidation from the source. Inert gas evenly covers the surface of the molten metal, preventing stress concentration caused by local oxidation. The porosity is reduced to below 0.2%, and the crack rate is almost zero.

Taeantech fully automatic gold bar tunnel furnace achieves high quality, high efficiency and low energy consumption in the precious metal smelting process through the efficient power of IGBT induction heating, the extremely precise PID±1℃ temperature control, the uniformity guarantee of segmented thermal field optimization and the purity maintenance of inert gas protection. It is a very crucial link in casting high-quality gold bars.

Part 3 Discharging Mechanism

The discharging mechanism of the fully automatic gold bar tunnel furnace is the core link between the smelting process and the output of finished products, and it undertakes the key mission of precisely discharging the gold liquid after cooling and shaping. It integrates high-temperature resistant materials, intelligent positioning push, multi-device collaborative control and safety protection technologies, achieving non-destructive transmission from high-temperature environments of 1200-1600℃ to normal-temperature gold bars.

Cooling platform: During the production process of the fully automatic gold bar tunnel furnace, the heating elements, induction furnaces and other equipment inside it generate a large amount of heat. The water cooling platform removes the heat generated by the equipment by circulating cooling water, ensuring that the equipment operates within an appropriate temperature range, thereby guaranteeing production efficiency and product quality.

Conveying system: The conveying system is composed of high-temperature resistant conveyor belts and push rod structures. The design adopts variable frequency speed regulation technology, and the transmission speed is adjusted through a frequency converter to adapt to the heating duration and ejecting requirements of different gold bars. The conveying system adopts a modular design and can adjust the width or height of the conveying line according to the size of the gold bars (such as length and width). Reduce the vibration of the gold bar during movement to prevent surface scratches or deformation.

Positioning device: Through multi-point temperature sensors and Mitsubishi PLC operating system, it ensures that the position error of the gold bar at the discharge port is less than ±1mm. The sensor monitors the position of the gold bar in real time, triggering the action of the mechanical hand or the discharging component. The limit bar works in coordination with the limit slot to prevent the gold bar from deviating and causing the discharge to fail.

The fully automatic gold bar tunnel furnace discharging mechanism has achieved high efficiency, precision and automation in gold bar production through the integration of high-temperature resistant transmission, dynamic positioning, safe material receiving and modular design. Its technical features not only enhance production efficiency and product quality, but also reduce the overall cost through energy-saving design and flexible adaptability, providing a reliable solution for the precious metal processing industry.