A Thermal-Expansion-Type Microactuator with Paraffin as the Expansive Material

Nobuyuki Kabei, Masayuki Kosuda, Hideki Kagamibuchi, Ryoichi Tashiro, Hitoshi Mizuno, Yasuhiro Ueda, Kiichi Tsuchiya

研究成果: Article査読

40 被引用数 (Scopus)


Our aim is to develop a microactuator for use in endoscopie-surgery. The purpose of this study was to construct cylinder-piston-type microactuators actuated by thermal expansion of paraffin. We use paraffin as the material for expansion because paraffin has a large coefficient of expansion in the temperature range of 35 to 45 degrees centigrade. For smooth actuation of the piston, we must prevent the paraffin from sticking to the inside surface of the cylinder. Thus, the paraffin is enclosed in a silastic tube. The cavity between the cylinder and the tube is filled with silicone oil for lubrication and prevention of expansion loss. The outer diameter of the actuator is 2.5 mm and its length is 130 mm. The actuator can generate a stroke of 8 mm against a load of 1 kg.

ジャーナルJSME International Journal, Series C: Mechanical Systems, Machine Elements and Manufacturing
出版ステータスPublished - 1997 12

ASJC Scopus subject areas

  • 機械工学
  • 産業および生産工学


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