| 摘要 |
PROBLEM TO BE SOLVED: To obtain a molded product of high precision and high quality stable in resin pressure by excluding the effect depending on mechanical precision and to more enhance the homogeneity of the molded product (weight) by excluding the effect exerted on resin density (resin amount) at the time of weighing. SOLUTION: A predetermined rotation inhibiting section Zn that inhibits the rotation of a screw 2 from the start of an injection process and a screw angle (reference angle) Qo relatively small in the irregularity R at every shot of resin pressure Pr at the time of advance of the screw 2 are preset. When the injection process is performed, the screw 2 is rotated up to the reference angle Qo after the rotation inhibiting section Zn is elapsed from the start of the injection process and the injection process is subsequently performed while holding the screw 2 to the reference angle Qo. COPYRIGHT: (C)2008,JPO&INPIT
|
