Patent Number: 7,101,167

Title: Method and a device for manufacturing a tool and a tool made by the method

Abstract: A rotary tool such as a helix drill and an end mill for example, is manufactured by forming a blank by an extrusion process, and then sintering the blank. During the extrusion, a mixture is passed through a die which provides a cylindrical shape to the outer peripheral surface of the mixture. A plurality of jaws are disposed downstream of the die for conducting the mixture. Each jaw includes a helical ridge for engaging the outer surface of the extrudate to cause a helical groove to be formed therein which constitutes a chip flute in the tool. During the extrusion, the jaws are moved away from the mixture to terminate formation of the chip groove, whereby a shank portion of the tool is formed.

Inventors: Puide; Mattias (Fagersta, SE), Bruhn; Johnny (Norberg, SE), Gronkvist; Mikael (Norrkoping, SE)

Assignee: SECO Tools AB

International Classification: B29C 47/12 (20060101)

Expiration Date: 9/05/02018