Induction heated vacuum furnace for making brazed diamond dental burrs
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United States of America Patent
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Jun 5, 2018
Issued Date -
Oct 22, 2015
app pub date -
Apr 17, 2015
filing date -
Apr 17, 2014
priority date (Note) -
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Abstract
Process for manufacture of a dental burr including a brazed diamond grit working surface comprising the steps of: a. providing a vacuum induction furnace and a graphite insert which is tuned to be heated at a predetermined frequency in the induction furnace, said graphite insert including a sub chamber configured for receiving at least one dental burr; b. providing a dental burr blank including a shaft portion and a working head portion; c. providing a synthetic diamond abrasive grit material, which is unprocessed for removal of ferromagnetic properties, mixture with a temporary green binder which adheres to the burr substrate and coating the working head portion with the mixture; d. placing the coated burr into the graphite insert sub chamber and heating the graphite insert to 910 to 990° C.; and e. heating the coated burr in the chamber under a vacuum for forming a diamond burr with a brazed diamond grit working surface.
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