| 摘要 |
<p>PURPOSE:To accurately cut a connection bar by forming a reference hole at the center of a resin in a sealing formation precess with a resin and then cutting out the connection bar upon positioning with the reference hole so as to cope with lead's deformation due to contraction, etc., when a resin hardens. CONSTITUTION:A reference hole 21 is easily made by forming a pin on a female mold of a mold die. By engaging the reference hole 21 with a positioning pin 31 farmed on a female die 3 which cuts a connection bar such as a tie bar 13, sure positioning is obtained. At this state, a tie tar punch 4 presses from above to accurately cut out a connection bar such as the tie bar 13, so a lead 14 is separated with little damage. To mold with resin, a lead frame 1 is aligned with a mold die using an index hole 12 of the lead frame 1 as a reference. At that time, the pin for a reference hole is farmed at, almost near, the center.</p> |
