| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a multi-cavity injection molding die which easily obtains filling balance into each cavity. <P>SOLUTION: Molten resin introduced from a sprue 1 is filled in a plurality of cavities 8, 9, 10, 11, 12, 13, 14 and 15 of the injection molding die. The injection molding die includes a stair shape 7 having a cross sectional area same as that of a first runner 2 and formed within 25-75% of a height of the first runner 2 at a branch part from the first runner 2 to a second runner 3 so that generation distribution of shearing heat of the molten resin flowing by branching from a first runner 2 to a second runner 3 is made even on right and left sides to uniform the filling balance of the molten resin into the plurality of cavities. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
