Chemically machined sheet metal cutting tools and method

Details Chemically machined sheet metal cutting tools and method Chemically machined sheet metal cutting tools and method

1990-12-04

1992-03-31

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

29 761, 301663, 51204, 51394, 51309, 76 251, 76112, 156640, 1566611, B44C 122, C23F 102, B24D 1100, B23D 6300

Patent

active

051005069

ABSTRACT:
A method is shown for manufacturing a sheet metal tool from a metal blank in which a predetermined pattern of etching resistant material is applied to the back surface of the metal blank to define exposed areas separated by resist areas. A layer of etching resistant material is also applied to the front surface of the metal blank which overlies at least the exposed areas on the back surface of the metal blank. The exposed areas on the back surface are then subjected to etching treatment through the exposed areas to form a tooth shape with a cutting edge. The etching treatment is applied solely from the back surface of the metal blank, whereby the cutting edge is so formed terminate in sharpened surfaces in the plane of the front surface, protected by the layer of the etching resistant material on the front surface of the metal blank.

REFERENCES:
patent: 107808 (1870-09-01), Phillips
patent: 297816 (1884-04-01), Ledward
patent: 788236 (1905-04-01), Bartholomew
patent: 3045321 (1962-07-01), McDermott
patent: 3079669 (1963-03-01), Bryant
patent: 4240806 (1980-12-01), Frantzen

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