| 摘要 |
PURPOSE:To provide mechanism parts such as a disk, a gear, a cam, etc., made of thermoplastic resin by a blow injection molding which have a good appearance and are excellent in dimensional precision. CONSTITUTION:In a mechanism part made of thermoplastic resin molded by a blow injection molding, the mechanism part is revolved with its axis as a center. A hollow rate of a hollow part of the mechanism part is 5 to 45%. A wall thickness in a molded area of the hollow part is 1.8 to 6mm. |
