| 摘要 |
PURPOSE:To exactly hold a lead frame in a given position for ensuring its continuous operation by a method in which a guide hole for regulating the longitudinal position is drilled in the central side edge of the lead frame, long guide holes are drilled in both end edges, and a projection pin is fitted into these holes. CONSTITUTION:Round guide holes 2 are formed in the central both edges of the lead frame 1, and oblong guide holes 3 are formed in both end edges along the longitudinal direction of the lead frame. The lead frame 1 is held by an upper mold 4 and an lower mold 5 and positioned by a round section of pins 6 and 7 projectionally provided to the lower mold 5. Thus, even when the lead frame 1 is thermally expanded by heating in the former process, the longitudinal position of the lead frame 1 is secured in place by the central guide holes 2, and also its widthwise position is secured in place by the guide holes 3 on both ends. Thus, a baking process and a molding process can be continuously shifted, permitting the continuous operation of molding to be performed. |
