Big copper age cast copper product production process

**The Big Copper Age: Handcrafted Copper Art and Its Time-Honored Production Process** During the Big Copper era, every copper casting product was a masterpiece of artistry, requiring 12 intricate and labor-intensive steps, all done by hand. Each stage demanded precision, patience, and skill, resulting in exquisite works that blend craftsmanship with beauty. **Process 1: Clay Sculpture** Every piece begins with a clay prototype, created by skilled sculptors who refine the design through repeated trials. The quality of the clay sculpture directly influences the final product’s appearance and character. Our artists are renowned for their ability to capture the essence of the original design, ensuring each creation is a true reflection of artistic vision. **Process 2: Silicone Mold Making** A high-quality silicone mold is crafted using a material known as Likang Silicon. This advanced chemical compound allows for exceptional detail, even capturing the finest textures like hair strands. It ensures accuracy in replication throughout the production process. **Process 3: Resin Prototype Creation** Once the silicone mold is ready, it is filled with polyethylene (also known as Boli Polyethylene) to create a resin prototype. This step serves as a model for the next stages and helps ensure the final shape is accurate. **Process 4: Resin Embryo Trimming** The resin prototype undergoes careful trimming, grinding, and texture refinement to prepare it for the next phase. This step ensures a smooth and precise surface before moving forward. **Process 5: Re-Manufacturing the Silicone Mold** The finished resin body is used to create a new silicone mold, which will be used in the following steps. This ensures consistency and precision in the reproduction of the design. **Process 6: Paraffin Prototype Casting** Molten wax is injected into the silicone mold under pressure to create a paraffin embryo. This wax replica closely matches the final product's shape and details, serving as the basis for the next stage. **Process 7: Refining the Paraffin Prototype** After being removed from the mold, the paraffin prototype is carefully trimmed to remove any imperfections or mold lines. This critical step ensures the final product maintains its intended form and surface quality. **Process 8: Ceramic Shell (Sand Mold) Production** Multiple wax embryos are assembled into a tree-like structure and repeatedly dipped into ceramic slurry. After several layers are applied, the shell is dried and hardened. The wax is then melted out, leaving behind a hollow ceramic shell ready for casting. **Process 9: Sintering** The ceramic shell is placed in a high-temperature sintering furnace at around 800°C to strengthen it and prepare it for metal casting. **Process 10: Casting** Copper alloy is poured into the ceramic shell at temperatures ranging from 800°C to 1000°C, depending on the material. Once cooled, the outer shell is broken away, revealing the raw copper casting. **Process 11: Finishing and Machining** The rough copper casting undergoes sanding, cleaning, cutting, grinding, heat treatment, shaping, machining, and polishing to achieve the desired finish and structural integrity. **Process 12: Surface Treatment and Protection** Finally, the copper product is treated to achieve the desired surface effect—such as an antique finish or polished look. It is then waxed and polished to protect and enhance its appearance. Each copper product from the Big Copper era is not just a craft but a legacy of tradition, skill, and artistry. Submitted by: http://news.chinawj.com.cn

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