| 摘要 |
Heat transfer roll for processing materials and having separate temperature zones along its outer surface. The roll has an outer shell and an inner shell with a series of serpentine channels formed between the two shells along a predetermined length of the roll, and with a helical channel formed between the two shells around the roll along the remaining length of the roll. A heat transfer medium circulates through the serpentine channels and is of a different temperature than the heat transfer medium that flows along the helical channel. The two channels are arranged so as to establish along part of the length of the roll working surface a uniform temperature zone above the serpentine channels and along the remaining length of the roll working surface a temperature gradient zone above the helical channel. The temperature from the uniform temperature zone is conducted in part to the adjacent temperature gradient zone to minimize possibility of thermal shock due to differential expansion.
|
