BLATTRÜCKHALTEEINRICHTUNG ZUM PERFORIEREN VON KERAMISCHEN GRÜNFOLIEN UND PERFORIERGERÄT

摘要

Move, deformation, or damages of a green sheet can be securely prevented by improvement of the material and shape of a green sheet presser 40 affixed to a punching tool 30 provided with a cutter section 32 for punching a via hole on a ceramic green sheet 20. The sheet presser 40 of the present invention is composed of an elastic material with hardness between 50 to 60 degrees, and comprises: a support portion 46 disposed on one end in the axial direction with a relatively large outer diameter, thick-walled in the radial direction, and engageable in the punching tool 30; a contact portion 42 disposed on the other end in the axial direction with a relatively small outer diameter, thin-walled in the radial direction, and comes in contact with the green sheet 20; and a housing hole 48 axially extending from the contact portion 42 for housing the cutter section 32.