| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the occurrence of appearance defect such as a weld line while preventing increase of a wasting resin amount. <P>SOLUTION: The width direction of a gate 13 along a design molding face 14 and a non-design molding face 15 is made to be the width direction of a cavity 10, and the injection direction of the gate 13 to be the depth direction of the cavity 10. In the non-design molding face 15, the long holes 17 extending from a side face 16 along the depth direction of the cavity 10 are formed between the gate 13 and both edges in the width direction of the cavity 10, respectively, and the movable walls 18 fitted in the long holes 17 are formed to be capable of advancing and retreating between the position of the non-design molding face 15 when retreating and the protruding position when protruding toward the design molding face 14. When injecting a melted resin into the cavity 10, the flow of the resin toward the width direction is once stemmed by making the movable wall 18 protrude to the protrusion position, and then the movable wall 18 is set back to the retreating position. <P>COPYRIGHT: (C)2013,JPO&INPIT |
