メタルジェットノズルの噴射粒径限界に関する考察(機械要素,潤滑,工作,生産管理など)

概要

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The authors have developed two types of metal jet nozzles, i.e., a molten metal type and an electric-discharge type. In the molten metal type, the molten metal droplets are jetted through a hole in the nozzle by the action of a piezo-electric actuator. In the first half of this paper, the jetting mechanisms of metal droplets and the minimum droplet sizes able to be jetted are discussed. Some considerations show that an ultra-small droplet can be jetted in the case of the molten metal having a concave meniscus to nozzle material. On the other hand, it becomes very difficult to jet smaller droplets in the case of molten metal having a convex meniscus. These discussions are confirmed by experiments under several combinations between molten metals and nozzle materials. In the electricdischarge type, molten metal droplets are jetted intermittently by blowing out the molten balls which are formed at the end of a metal wire by the electric discharge. The mechanisms of the droplet formation are discussed. On the bases of the discussion and the experimental results, the minimum and maximum droplet sizes are then estimated under practical conditions.
一般社団法人日本機械学会の論文
2006-10-25