Process Flow for Automated Hydraulic Production Lines for Commemorative Coins, Medals, and Badges

An automated hydraulic production line for commemorative coins, medals, and badges essentially transforms the traditional "mold making – stamping – manual post-processing" model into a "continuous, precise, and intelligent integrated process." The core objective is to ensure product consistency and production efficiency through automation and intelligent control. The complete process flow of this production line can generally be divided into the following stages, as outlined below by the team at Jianlong Hydraulic Technology.

1. Stage One: Preliminary Preparation and Mold Making

This serves as the foundation for the entire production process and determines the precision of the final product.

1.1 Design and Mold Making: Designs are created digitally based on client artwork, and precision molds are manufactured using equipment such as CNC precision engraving machines. Mold precision is critical for high-relief designs or complex patterns.

1.2 Material Preparation: Raw materials—such as copper, iron, gold, or silver—are cut (via mechanical shearing or laser cutting) into blanks of specific shapes, such as discs, that meet required dimensions. Some high-end automated lines utilize laser cutting to achieve superior precision and higher material utilization rates.

2. Stage Two: Core Forming—Automated Hydraulic Stamping

This is the central phase of the production line, executed through the collaboration of hydraulic presses and automation systems; the entire process is highly automated.

2.1 Automatic Feeding and Positioning: Automated feeding systems—such as vibratory bowl feeders and robotic arms—precisely place the blanks into the working mold ring of the hydraulic press. Positioning accuracy reaches ±0.1mm, ensuring the precision of the subsequent stamping step.

2.2 Precision Hydraulic Forming: This stage determines the clarity and three-dimensional quality of the pattern. Controlled by an intelligent PLC system, the hydraulic press applies hundreds of tons of force (typically ranging from 50 to 1,000 tons) to imprint the intricate mold patterns onto the blank. Advanced systems automatically adjust the pressure based on the material (e.g., gold or silver) to ensure consistency in weight, thickness, and pattern depth across every product.

2.3 Automatic Demolding and Collection: Once stamping is complete, a demolding mechanism ejects the product from the mold. It is then automatically collected by a robotic arm or conveyor belt and transferred to the next processing stage—all without the need for manual intervention. 

3. Stage 3: Post-processing and Surface Finishing

Stamped semi-finished products require a series of post-processing steps to become finished goods.

3.1 Surface Treatment: Includes polishing (to enhance luster), electroplating (gold, silver, nickel, etc., for rust prevention and decorative effects), and coloring processes such as imitation enamel, baking enamel, and epoxy coating.

3.2 Automated Inspection: Some advanced production lines integrate automated inspection systems to monitor critical parameters—such as temperature and pressure—in real-time, rejecting defective items and effectively reducing the defect rate.

4. Stage 4: Packaging and Final Output

Finally, inspected and approved finished products undergo automated counting and packaging before shipment. The entire production line utilizes centralized PLC control, enabling stable, uninterrupted 24-hour operation and increasing production efficiency by more than 3 to 5 times compared to traditional methods.

5. Key Process Highlights

5.1 Wide Range of Materials: The production line accommodates various materials, including common options like copper, iron, stainless steel, zinc alloy, and aluminum alloy, as well as precious metals like gold and silver.

5.2 hydraulic press Tonnage Selection: Equipment tonnage is selected based on product size, thickness, and design intricacy. Standard commemorative coins and badges typically use 100–300 ton presses, whereas large-diameter, high-relief, or high-volume products may require equipment with a capacity of 500 tons or more.

5.3 Flexible Process Switching: By changing molds and adjusting programs, a single production line can rapidly switch between manufacturing different products—such as commemorative coins, medals, and badges—effectively meeting customization demands for diverse product types and small batch sizes.

By integrating stages such as pressing, blanking, and post-processing, this automated production line achieves efficient and stable manufacturing from raw materials to finished products. Jianlong Hydraulic Technology currently offers customized automated hydraulic production lines—ranging from 100 to 5,000 tons—for the manufacture of commemorative coins, medals, and badges. We possess mature technology and extensive experience, providing comprehensive solutions that include the production line itself along with auxiliary equipment such as chillers and air compressors. All our hydraulic presses are CE certified and fully compliant with the EU Machinery Directive (2006/42/EC). Our products are exported to markets across Europe and the Americas, including Germany, the United States, Mexico, and Portugal. Please contact us if you have any inquiries or purchasing needs (you may also scan the WhatsApp QR code below); Jianlong Hydraulic Technology is dedicated to providing you with professional, personalized, and customized solutions.