EXTRUDING MACHINE HEAD Russian patent published in 1998 - IPC

FIELD: mechanical engineering; welding production of coated electrodes for manual arc welding. SUBSTANCE: head has housing with compound pass channel, rod pass member with end piece, guide bushing, calibrating bushing with conical inlet hole and bushing adjusting screws. Screws are provided with cones on the ends and are arranged in parallel with rod feed axis. Screw cones adjoin calibrating bushing over generating lines. Face for corresponding cone is cut off on bushing. Angle of cone is 15-45 degrees. Compound pass channel is made in form of two coaxial cylindrical spaces arranged directly above coating chamber. Smaller space is mated with coating chamber and its diameter is equal to diameter of inlet hole of calibrating bushing. EFFECT: improved quality of coated electrodes, reduced power consumption at their manufacturing. 2 dwg