Joint Purchasing & Shared Equipment for Small Foundries
小铸造作坊的联合采购与共享设备
标签：联合采购, 共享设备, 协同组合, 成本分摊
三至五家小型铜铸造作坊可组成采购联盟：石墨坩埚按年用量集中下单，厂价直供省 15–20%；硅溶胶、呋喃树脂与耐火材料按季度拼单摊薄运费。设备共享更划算——一台 200 kg 碾轮混砂机（约 3–5 万元）由成员按吞吐量分摊折旧，热电偶校验与 X 光外检合并送检降低单价。日本铸造产业广泛存在"协同组合"模式，共同采购原材料与共用处理设施已有成熟章程。国内作坊可参照制定分摊表与排期公约，先从拼炉与拼料起步。
Three to five small copper foundries can form a buying group: order graphite crucibles annually at factory prices to save 15–20%, and pool quarterly purchases of colloidal silica, furan resin and refractories to share freight. Shared equipment pays faster — a 200 kg mulling unit (¥30,000–50,000) with depreciation split by throughput, plus combined thermocouple calibration and outsourced radiography at better rates. Japan's foundry districts run mature kyodo-kumiai (cooperative association) charters for joint buying and shared plants; smaller shops elsewhere can start with pooled melts, pooled material orders and a simple cost-share schedule.