| 摘要 |
PROBLEM TO BE SOLVED: To manufacture an endless belt for preventing a slip of a belt from a spreading roller of the belt without prolonging a belt manufacturing time with a simple constitution. SOLUTION: The centrifugally molding method comprises the steps of casting a polyamide acid solution in a cylindrical coating mold 1, rapidly rotating the mold 1, and forming a uniform polyamide acid film 2 by its centrifugal force. In this case, at the time of rotating the mold 1, a core rotor 3 having a rough surface is brought into contact with the film 2 to rough the film 2. Thus, since the rotor 3 can be roughed at the same time as the time of forming a coating film with a simple constitution of merely bringing the rotor 3 into contact with the film 2 formed in the mold during rotating, the belt can be manufacturing without prolonging the belt manufacturing time as compared with a conventional method for manufacturing the endless belt for roughing after the belt is heated and salidified. |
