| 摘要 |
PURPOSE:To form integrally a resin in a runner part and resins in gate parts and to make it possible to separate a resin formed integrally with a lead frame from the lead frame by a method wherein the runner and the gates are connected to each other and the runner is provided with second runners provided in such a way as to come into contact directly to the gate side of the inserting grooves of the lead frame. CONSTITUTION:Second runners 4, which are in parallel with a runner 1 and are connected with the runner 1 at both ends of the runners 4, are provided in contact directly to inserting grooves 5 of a lead frame. The runner 1, gates 2 and the runners 4 are coupled with one another. Therefore, when a molding resin is flowed in through the runner 1, the molding resins filled in the runner 1, the gates 2 and the runners 4 are formed firmly and integrally and no burr is generated on the sides of the lead frame after the end of a molding process unlike a conventional way. Thereby, when, the lead frame is taken out, the molding resin formed integrally with the lead frame can be reliably separated from the lead frame. |
