| 摘要 |
PURPOSE:To remove residual stress and prevent the deformation before and after the molding process onwards by applying ultrasonic vibration to at least one of the surface or back face of an original sheet on an extrusion molded sheet extruded out of an extruder. CONSTITUTION:An extruded original sheet 8 extruded out of an extrusion molding machine 3 onto a sheet and cut into the given length is transferred to the following process by conveyors 9 and 10, and the conveyor 9 is a belt conveyor 9a, and the conveyor upper section is prevented from bending downward by applying a supporting plate 11 to the back face of upper section, while ultrasonic vibrator 12 is provided above, Said vibrator 12 is supported by a supporting tool 13 to be adjustable in its upper and lower positions, and ultrasonic waves from a ultrasonic generator 14 and input to vibrate a smoothening piece 15 installed on the lower end. |
