Patent ID: 8440937
Filing Date: 2013-05-14
Classification: B23K

Abstract:
1. A self-cleaning nozzle for a gas metal arc welding apparatus, comprising: a generally cylindrical shield housing having an internal shield surface and an open end, said shield housing having a recessed internal shield surface adjoining said open end; and a laminate group adhered to said recessed internal shield surface of said shield housing, said laminate group adjoining said open end and extending a predetermined axial length therefrom; wherein said laminate group comprises sequentially alternating layers of a first material and a heat sensitive bonding material in mutually concentric disposition; and wherein the heat sensitivity of said bonding material is selected such that during welding by the welding apparatus, heat of the welding is transmitted through an outermost first material layer such that the heat causes adhesive release of an adjoining bonding material layer, whereupon the outermost first material layer detaches from said laminate group exposing a new outermost first material layer.