Stretching machine.

摘要

A pair of stretching pulleys (3a,3a) are rotatably mounted on a pair of support plates (3,3) within a housing (1). A belt (3b) is wound around the upper part of the stretching pulley and a number of turn pulleys. A film (F) introduced onto the stretching pulley is held between the belt and the stretching pulley and is transferred. Air flow generated by a fan (51) and heated with a heater (5) is blown against the film through a louver and circulates through bellows mounted to the housing to return to the fan. The stretching pulley is partially cooled in a water bath (4c). The support plates are rotatably connected to screw shafts, thereby changing a distance and angle between the plates. The stretch width or stretch ratio of the film is thus adjusted with the change of the distance and angle. <IMAGE>