Method and a device for manufacturing a tool and a tool made...

Details Method and a device for manufacturing a tool and a tool made... Method and a device for manufacturing a tool and a tool made...

2006-09-05

2006-09-05

Smith, Duane (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Stock pressurizing means operably associated with downstream...

Including auxiliary shaping means associated with molding...

C425S076000, C425S465000, C425S466000

Reexamination Certificate

active

07101167

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.

REFERENCES:
patent: 4351631 (1982-09-01), Gessner et al.
patent: 4671763 (1987-06-01), Weiler
patent: 4779440 (1988-10-01), Cleve et al.
patent: 5438858 (1995-08-01), Friedrichs
patent: 5792490 (1998-08-01), Geiger
patent: 5947660 (1999-09-01), Karlsson et al.
patent: 5989482 (1999-11-01), Sagawa
patent: 6176699 (2001-01-01), Franjo et al.
patent: 0 458 774 (1991-11-01), None
patent: WO98/28455 (1998-07-01), None

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