| 摘要 |
PROBLEM TO BE SOLVED: To provide a method capable of demolding even a roll, which has an undercut part and a thin elastomer layer with a thickness of about 0.3 mm, without using a split mold by efficiently cooling the roll to contract its diameter by putting a cooling medium in a core rod body to manufacture the smooth roll having no parting line or flaw on its surface. SOLUTION: A liquid elastomer material 10A is injected in the cavity 3 of a roll mold 1 in a state that the hollow core rod body 9 of a roll 11 is inserted in the cavity 3 of the mold 1 and heated and cured to manufacture the roll 11 wherein the elastic layer 10 is formed to the periphery of the core rod body 9. Thereafter, a cooling medium 13 is directly put in the core rod body 9 to cool the core rod body 9 to thermally shrink the core rod body 9 along with the elastic layer 10, the gap C with a predetermined width is formed between the inner periphery of the cavity 3 of the mold 1 and the outer periphery of the roll 11 to eliminate the undercut part present in the roll 11 and the roll 11 is drawn out of the cavity 3 of the mold 1. COPYRIGHT: (C)2008,JPO&INPIT |
