| 摘要 |
PURPOSE:To measure the thickness distribution of a continuously travelling film continuously and accurately on an on-line by measuring the temperature distribution of the film. CONSTITUTION:If a heating or cooling source is uniform and fixed from the viewpoint of timing in a direction for measuring its thickness in a heating or cooling area of a continuously travelling film, a phenomenon that the temperature of a fine part of the heating or cooling source is changed in inverse proportion to thermal capacity is applied to a film production process by an inflation method e.g. When the film extruded from a die 1 is to be wound around a winding roll 8, an infrared-ray thermometer 4 is arranged on a position showing temperature distribution in a direction for measuring thickness change; i.e., a position separated from an outlet of the die 1 by about 30-1,000mm.. The output of the thermometer 4 is processed by a computer 5, displayed on a computer screen 6 and also printed out by a printer 7. |
