| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a high-precision tubular body by which surface undulation and unevenness caused by a coating method are hardly generated. SOLUTION: The method for manufacturing the high-precision tubular body comprises coating the inner face of a cylindrical mold 2 with a polyamic acid solution 1 by means of a dispenser by relatively moving the cylindrical mold 2 in the rotating shaft direction to a dispenser feeding part 3 while the cylindrical mold 2 is rotated in the peripheral direction, leveling unevenness of the coating film face by a centrifugal force, obtaining a cured or solidified cylindrical film by heating or extraction, inserting this cylindrical film into an inner mold with a circular section with a surface roughness Ra of 0.5-3μm and a difference between the maximum value and the minimum value of the surface roughness Ra of less than 0.5μm, performing imidation of it by heating and thereby forming the high-precision tubular body with a precision of undulation of at most 0.7 mm. COPYRIGHT: (C)2003,JPO |
