core-metalをパンチングするとき、内径の抜きカスが下に落ちず、

core-metalをパンチングするとき、内径の抜きカスが下に落ちず、金型に残ると、core-metalを押し出すときに内径が引っかかり、変形する。

結果 (英語) 1:

When punching the core-metal, venting debris inner diameter without falling down, and remain in the mold, the inner diameter is caught when extruding the core-metal, is deformed.

結果 (英語) 2:

When punching core-metal bore out bore caught when push the core-metal and Caspar falling under the remaining mold and unmold.

結果 (英語) 3:

Core-metal, when punching to the internal diameter of the customer is to be dropped under the mold, and remain in the core-metal when you extrude inner diameter, the deformation to be caught in.