| 摘要 |
A sheet film forming roll includes a center rotary shaft. Fixed end plates are disposed in two locations which are away from each other in an axial direction of the center rotary shaft, respectively. An external cylinder is made of a metal thin film. Two ends of the external cylinder are rotatably supported by the fixed end plates, respectively. Multiple rolling rubber rolls have ends which are rotatably supported by the respective fixed end plates. The rolling rubber rolls are in sliding contact with an outer peripheral surface of the center rotary shaft, and in sliding contact with an inner peripheral surface of the external cylinder. The rolling rubber rolls divide an annular space between the external cylinder and the center rotary shaft into multiple heating medium chambers arranged in a circumferential direction of the sheet film forming roll. A heating medium is configured to be filled in each of the multiple heating medium chambers. At least one heating medium chamber includes a heater which uses electricity as its heat source. |
