1results about How to "Simplified molding steps" patented technology

This invention discloses a powder metallurgy external helical gear workpiece forming die, comprising a forming base with a forming cavity; a first punch; a second punch with a first forming end and a first connecting end, and a first through-channel within the second punch; a third punch with a second forming end and a second connecting end, and a second through-channel within the third punch; forming helical teeth on the inner surface of the second forming end; at least two clearance through holes on the second connecting end, extending circumferentially along the second connecting end; a fourth punch with a third forming end and a third connecting end; guiding helical teeth on the outer surface of the third forming end, the guiding helical teeth engaging with the forming helical teeth; and a mandrel assembly including a mounting base and at least two mandrels spaced apart axially from the mounting base. This invention can form helical teeth and holes on the helical teeth in a single die-casting operation.