プラスティツクの転造加工について(歯車の場合)

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  • プラスティツク ノ テンゾウカコウ ニ ツイテ ハグルマ ノ バアイ
  • On the Plastics Rolling (in Case of Gears)

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I tried to manufacture mechamical element parts in the rolling method instead of the injection molding way. 1) As the result of cold rolling the free drive, the manufacturing was found possible 0.1M～0.6M. Though, not the same way according to the nature of materials, the hot rolling seems suitable over 0.7M. 2) The rolling possibility of each material when the cold rolling is applied is fair, as far as Polyvinyl Chroride, Styrol, Acril, Cycholac and Tyril are concerned, and grows gradually worse in the order of Polyethelen, Hyzex and Nylon. Out of gear blanks got from logs rather than from blanks, a better result can be obtainable without any difference of strength caused by the directions of blanks. 3) As the rolled plastic has less mounding character than metals, gear blanks outside diamter coincides with addendum circle diameter of the finished gear. 4) Among the rolling conditions, the rolling speed is better when the rotating speed is low while the pressing speed of the die-rollers is great.

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