A PUNCHING MOLD FOR A SHEET

• Main Authors: YEOM, DONG BOK, LEE, JAE HYUG
• Format: Patent
• Language: English; Korean
• Published: 28.03.2014
• Subjects: CUTTING; CUTTING-OUT; HAND CUTTING TOOLS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORATING; PERFORMING OPERATIONS; PUNCHING; PUNCHING METAL; SEVERING; SEVERING BY MEANS OTHER THAN CUTTING; STAMPING-OUT; TRANSPORTING; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

The present invention relates to a sheet punching mold including a lower mold (200) and an upper mold (100) moved down toward the lower mold (200) to punch a center hole (13) in a sheet (10) and form a perforated line (14a) for cutting only an original sheet (11) around the center hole (13) by press action. The upper mold (100) has a mold holder (110), a blanking punch (122), fixed to the mold holder (110), for blanking the center hole (13) in the sheet (10), a perforating punch (121) fixed to the mold holder (110), having a center through-hole (121a) penetrating through a center portion thereof so that the blanking punch (122) is positioned, and forming the perforated line (14a) for cutting only the original sheet (11) of the sheet (10) by a lower corner (121b′) of a center through-hole (121a), a pushing member (130) provided between the blanking punch (122) and the perforating punch (121), and pushing and holding the sheet (10) when the blanking punch (122) blanks the center hole (13) and the perforating punch (121) forms the perforated line (14a) in the original sheet (11), and a pushing member (130) provided between an upper portion of the pushing member (130) and the mold holder (110), and transmitting a pressing force of the mold holder (110) to the pushing member (130) and simultaneously acting a resilient force onto the pushing member (130) when the mold holder (110) is presses against the lower mold (200). Therefore, it is possible to form both the center hole and the perforated line by one operation.