| 摘要 |
<p>PURPOSE:To improve control properties and start and finish a tandem extruder in a short time by eliminating the problem of poor follow-up properties of the pressure of a connecting tube when the number of screw rotations of a two-stage extruder is increased or decreased. CONSTITUTION:In the discharge pressure control method for a tandem extruder for controlling the number of screw rotations of a first-stage extruder 1, the output value is corrected by the correction value based on the ratio between the number of screw rotations n1 of the first-stage extruder and the number of screw rotations n2 of a second-stage extruder 2, and the output value is corrected by the correction value computed based on the inclination value of the approximation line expressed by the pressure balance line, representing the relation between the number of screw rotations n1 of the first-stage extruder 1 and the number of screw rotations n2 of the second-stage extruder 2 to the discharged pressure P, in the broken line approximation or tangential line approximation.</p> |
