| 摘要 |
PROBLEM TO BE SOLVED: To make a gate cutting as a post-working unnecessary by a method wherein the residual amount of a gate mark is made small in an injection molding with the mold with the horn gate. SOLUTION: The shape of the tip part 13a of a horn gate 13 connecting between a runner 2 and a cavity 4 is made to be nearly normal to the molding releasing direction (the direction indicated with the arrow arrow(a)). At a releasing, a stress concentrates in the solidified resin in the horn gate at the tip of the horn gate so as to perform the breakage of the tip part 13a of the horn gate at the spot near the surface of a molded product, resulting in allowing to make the residue of a gate mark smaller.
|
