Finishing: Shell Removal, Cut-off & Polish

后处理：清壳、切割浇道、打磨

type:tutorial · level:beginner · material:bronze · material:copper · scale:jewellery · scale:decorative-object · equipment:hand-tools · stage:cleanup · stage:finishing

标签：清壳, 切割, 打磨, 后处理

铸件冷却后先击碎型壳（水枪冲洗或手工剔），再用切割机/线锯切除浇道与冒口，留 1–2 mm 余量。随后用锉刀、砂带机、纤维轮逐级打磨：粗砂（120–240 目）去浇口痕，细砂（400–800 目）出光，最后布轮抛光或喷砂做哑光。注意：石膏型残留碱性物会加速铜氧化，务必彻底清洗并干燥后再着色或封护。

After cooling, break the shell (water blast or hand pick), then cut sprues and risers with a cutoff wheel or jeweler's saw, leaving 1–2 mm. Grind progressively: coarse (120–240) removes gate marks, fine (400–800) brings sheen, then buff or bead-blast for matte. Note: plaster residue is alkaline and accelerates copper oxidation — wash and dry thoroughly before patina or sealing. ---