| 摘要 |
<p>PROBLEM TO BE SOLVED: To eliminate a hysteresis of a displacing amount of a flexible lip by giving a compressed air obtained by subtracting a hysteresis compensating reduced pressure value from a command air pressure value to a gap regulating driver of a T-die lip, and then giving a compressed air of a command air pressure value to the driver. SOLUTION: A value of (Jx-ΔP) is calculated by a command value of this time, and an obtained digital signal is converted into an analog signal by a D-A converter 32 to instruct an electropneumatic regulator 33. Thus, a compressed air of a pressure obtained by subtracting a hysteresis compensating reduced pressure value from a command air pressure value is given to a gap regulating driver of a T-die lip. Then, command values 11, 12, 13,..., In of the previous time are replaced with original command air pressure value signals J1, J2, J3,...Jn instructed by a T-die operation board 23 this time to instruct the regulator 33, and hence the compressed air according to the original command air pressure value is given to the driver of the T-die lip.</p> |
