| 摘要 |
PURPOSE:To completely eliminate adhesion of unnecessary areas of the neck portion of a mount pin and devise to increase yield in an enclosing work, by coating the outer surface corresponding to the inner surface of the neck portion of the mount pin with a mold releasing agent such as graphite and boron nitride powder. CONSTITUTION:A part 27 of a shielding device 26 to shield a stem inserting and fitting portion 25 of a mount pin 22 is inserted into a stem lead hole 28 of the pin 22. After inserting and fitting the shield devide 26 to the mount pin 22, a mold releasing agent of a mixed solution of such as graphite or boron nitride powder and water is coated on predetermined positions. The enclosing work of the mount pin 22 obtained as above makes a clearance 31 between unnecessary areas 30 of a neck portion 3 and the coated film 24 on the pin 22 and prevents adhesion of these parts, allowing dramatic increase of yield in the enclosing work. |
