| 摘要 |
<p>PURPOSE:To stabilize a discharge amount by a method wherein a raw material feed amount to be supplied is controlled so that a filled amount of molten resin in a tip part calculated on the basis of discharge pressure of a multiple screw extruder, its extrusion capacity and a physical property of resin becomes a target value. CONSTITUTION:In a caluculation block L, a ROM is retrieved for a viscosity (mu) corresponding to a detected temperature of resin TP reading constants K1, K2 determined according to a shape of a screw from a RAM. A filled amount of the resin L1 in a tip part of a double-screw extruder is calculated according to relational formulas I, II. In the formula I, DELTAL indicates a varied amount of the resin filled amount, DELTAQ indicates an unbalanced amount in material balance, and (t) indicates time. By substituting discharge pressure P1 of the double-screw extruder for the formula II, the present filled amount L1 of resin is obtained. Then, a feed amount of a raw material is controlled so that the resin-filled amount L as a calculated result becomes constant as a target value.</p> |
