Method of cutting sheet materials
AssigneeShima Seiki Manufacturing, Ltd.
InventorMorita Toshiaki
Life of this patent
Estimating the term…
Abstract
At the time of cutting stacked sheet members, a knife or a punch pierces the sheet members at positions such as along a cutting line, in a region outside the cutting line, or in a seam allowance inside the cutting line. By moving the knife or the punch vertically, heat is applied to the sheet members such that the seam members are welded together vertically. Even if at the time of cutting stacked sheet members having low air permeability, it is possible to prevent warpage or slippage of the sheet members, and cutting is performed accurately.
Claims4
1-6. (canceled)
A method of cutting sheet members, wherein at the time of stacking a plurality of sheet members having air impermeability while fixing the sheet members by vacuum suction, and cutting the sheet members along a predetermined cutting line toward parts, the cutting is performed by locally heating a seam allowance of the part or a region outside the seam allowance, near the cutting line by frictional heat between the sheet members and a knife or a punch of a cutting head such that the sheet members are welded together vertically to fix upper and lower sheet members, or the cutting is performed such that a plurality of uncut portions are formed along the cutting line, and then, the uncut portions are cut.
Dependencies are inferred from the claim text.