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铝毛坯在冷挤压前镀上一层厚磷酸盐涂层可以保持住皂基润滑剂,以防挤压件划伤和金属粘在模具上。这个过程包括清洗、镀磷酸盐涂层和润滑几道工序。它是按下列次序浸在几个槽中来完成的: 1.于82℃温度下在三重磷酸钠溶液中浸泡5分钟。 2.冷水漂洗。 3.热水漂洗。 4.冷水漂洗。 5.热水漂洗。 6.按照生产厂商所推荐的操作方法浸于磷酸盐溶液中处理。 7.热漂洗。
Aluminum blanks are coated with a thick phosphate coating prior to cold extrusion to retain the soap based lubricant against scratches and metal adhering to the mold. This process includes cleaning, plating phosphate coating and lubrication processes. It is done by soaking in several baths in the following order: 1. Soak in trisodium phosphate solution at 82 ° C for 5 minutes. Cold water rinse. 3. hot water rinse. Cold water rinse. 5. Hot water rinse. 6. In accordance with the manufacturer’s recommended method of operation immersed in phosphate solution. 7. Hot rinse.