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789
东京2020奥运会的金、银、铜牌正式向世人亮相,但是制作奖牌的原料你了解从哪来?
日前,东京奥组委发布了2020东京奥运会奖牌制作过程的短片。据东京奥组委介绍说,日本从2017年4月1日开始用两年的时间在日本全国收集了约7万8985吨的小家电和621万部旧手机,从中提炼出32公斤的纯金、3500公斤纯银和2200公斤纯铜,所有的奖牌均来自这些回收提炼的金属。
奖牌多数由旧手机“贡献”。
从奖牌规格上讲,金、银、铜牌的直径均宽85毫米,净重分别为556克、550克、450克。其中,金牌和银牌的重量创下历届夏季奥运会奖牌重量之最。
在短片中,详细展示了制作奥运会奖牌的全过程,包括回收的废旧电子设备(基本全部是翻盖手机),拆下主板回收熔炼,设计奖牌模具,奖牌压制成型,清洗打磨,激光刻字,编制奖牌带,制作原木奖牌盒,机械之美与日本职人手作贯穿全程,让人心旷神怡。
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