| 摘要 |
PURPOSE:To simply prevent the oozing of resin by nipping a lead frame between upper and lower dies, forming a projection at the frame when charging molding resin into the cavity formed in the dies and pressing the projection with the dies thereby eliminating the gap therebetween. CONSTITUTION:A projection 6 becoming a weir at a dam part 5 formed at the lead frame 4 is formed by deforming the frame 4 itself or using metal having softer property than the mold. A projection 9 is formed correspondingly to the projection 6 on the contacting surface of the dies 8 when nipping the frame 4 using the upper and lower dies 8 beforehand, thereby pressing the projection 6 of the frame 4 so as to thus seal the gap between the dies 8 and the frame 4. Thereafter, predetermined molding resin 10 is charged into the cavity formed in the dies 8. Thus, the frame 4 can be prevented from generating burrs. |
