Steel rule die and method of manufacture
OwnerRonald A. Hillock, Steven B. Rossinventors
Life of this patent
Estimating the term…
Abstract
A steel rule die is disclosed having strengthening layers bonded to the die board to stiffen the die board against flexing during handling, while alleviating the tendency to loosen the steel rule during handling and enhancing the durability of the die. KEVLAR graphite fiber fabric is impregnated and bonded to either face of the die board with epoxy resin.
Claims9
A flat bed steel rule die comprising a flat plywood sheet having opposite faces and formed with a slot pattern extending in a pattern corresponding to a part to be die cut, a steel rule piece extending in a shape corresponding to said pattern, said steel rule piece fit into said slot pattern, said die characterized by a stiffening lamination bonded to each opposite face of said plywood sheet composed of at least one layer of graphite fiber fabric bonded to each opposite face of said plywood sheet to form a stiffened die board.
A method of making a flat bed durable steel rule die including the steps of:
- constructing a high stiffness die board by bonding high tensile strength fiber fabric layers to each face of a flat sheet of plywood;
- cutting a slot pattern in said high stiffness die board in the form of the part to be cut by said die;
- forming a rule piece in the shape of said slot pattern;
- assembling said rule piece into said slot pattern.
Dependencies are inferred from the claim text.