| 摘要 |
PURPOSE:To surely prevent flashes from developing by a method wherein a mold clamping oil pressure, under which the changing-over from filling during injection to dwelling during injection is performed, is set within a range corresponding to the range of the displacement of a mold parting face so as to change over to the dwelling during injection by means of the set displacement of the mold parting face. CONSTITUTION:A displacement-detecting device of the parting face 8 is used to detect a gap (delta) or a displacement sensor 21 sends an output in proportion to the gap (delta) through a lead wire 21a. A mold clamping oil pressure PC under which the changing- over to dwelling during injection is performed is set. In addition, the displacement deltaC of the parting face at the time when mold clamping pressure P reaches PC within the rising range (a) of mold clamping pressure is memorized. When the displacement (delta) of the parting face reaches deltaC in the filling section (f) during injection, the section (f) is changed over to the dwelling section (h) during injection. Further, because the maximum mold clamping oil pressure PE is set at a setter so as to set PC to satisfy the condition of O<PC<PE, the relation of deltaE<deltaC<deltaD is also satisfied. Because the relation of deltaC<deltaD is kept, no opening of the parting faces occurs and consequently no flashes develop. |
