| 摘要 |
PROBLEM TO BE SOLVED: To provide a mold capable of sealing a bearing part without applying a load to a shaft, capable of obtaining a roller having high deflection precision and sealable regardless of the viscosity of a resin. SOLUTION: A seal body 10 has a square cross-sectional shape and is equipped with the R-part 14 coming into contact with the base of a seal groove 11 and the R-part 13 coming into contact with a shaft 4 and has a wide sealing surface even in a low shrinkage factor to ensure sealability under low pressure. The seal body 10 is reduced or becomes zero in a crushing margin at the normal temperature to reduce the bending stress to the shaft 4. The seal body 10 is expanded by heating at the time of molding to increase the crushing margin to the shaft 4 and brought into contact with the outer peripheral surface of the shaft 4 to fill the gap with the seal groove 11 in a close contact state to perform sealing. COPYRIGHT: (C)2005,JPO&NCIPI |
