Process for the production of a coating on the surface of plasticizing screws for injection molding machines
AssigneeEngel Machinenbau Gesellschaft M.B.H.
InventorsOtto Urbanek, Peter Baldinger
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Abstract
A process for producing a coating on the surface of a plastifier screw for injection molding machines includes applying to a hard-metallic or ceramic substrate with low distortion, a steel screw base element, by high-speed flame spraying. During the coating process, a spray jet treats the different surface regions of the screw base element including the flanks and top of a rib as well as the base of the screw, independently.
Claims21
A process for producing a coating on a surface of a screw for plasticizing in an injection molding machine in which a metal, carbide-metal or ceramic material is applied as the coating to a screw main body consisting of steel, by means of at least one spray jet using a high-speed flame spray process characterized in that in the coating operation the spray jet acts separately on a top side of a flight of the screw, and on flanks of the flight of the screw and on a bottom of the screw the top, flanks and bottom being acted on by the spray jet independently of each other, a mechanical bond being made between the screw main body (1) and the coating.
Dependencies are inferred from the claim text.