| 摘要 |
An apparatus for calibrating and supporting an extruded film blown up into a film bubble made of a synthetic melt in an inflation extrusion installation consisting of supporting means driven by link rods whose inner ends are articulated in the median zone of each supporting means, and whose outer ends are articulated to brackets, which form parts of frames that carry spindle nuts at at least two points, and axially parallel screw spindles which are mounted on the basket-shaped frame and are provided with drive means, and have thread sections provided with threads of opposite hand screwed into said spindle nuts; that at a distance from one of said link rods, there is arranged an additional link rod parallel thereto and whose respective ends are articulated to a respective said supporting bar and to a said bracket. |
