| 摘要 |
PROBLEM TO BE SOLVED: To provide the roller molding die which the pin-hole defect is hard to occur in an elastic layer edge part while reducing the fluctuation of the outside diameter. SOLUTION: The roller molding die is constituted of a mold body 3 having an opening part 2A, 2B in both ends and a cap part 4A, 4B to be engaged to an opening part 2A, 2B. In this case, the cap part 4A, 4B has a cap body 6A, 6B with a cylindrical opening 5A, 5B and a support part 7A, 7B to support the edge part of a shaft 1 of the roller arranged in the cylindrical opening 5A, 5B of the cap body in the center. It is constituted that the cap body 6A, 6B and the support part 7A, 7B are connected by the rib 8A, 8B which extends toward the shaft direction of the roller and the concentricity between the outer circumference of the cylindrical opening 5A, 5B and the inner circumference of the support part 7A, 7B of the cap body is not more than the 10μm and the coaxial degree of the inner face of the mold body 3 is not more than 10μm, and it makes that the value before the engagement (outer diameter of the cylindrical opening 5A, 5B of the cap body)-(inner diameter of the mold body 3) is 0 to 50μm. COPYRIGHT: (C)2007,JPO&INPIT |
