Polymer bond abrasive articles and methods of making them

Abstract

Methods of making polymer bond abrasive articles and their precursors using powder bed jetting are disclosed. Polymer bond abrasive articles prepared by the method include abrasive articles having arcuate or tortuous cooling channels, unitary structured abrasive discs, abrasive segments, shaped abrasive particles, and abrasive wheels.

1 . A polymer bond abrasive article comprising a polymer bond material having abrasive particles retained in a polymeric matrix therein, wherein the polymer bond abrasive article has at least one of a tortuous cooling channel and an arcuate cooling channel extending at least partially therethrough. 
     
     
         2 . The polymer bond abrasive article of  claim 1 , wherein the abrasive particles comprise first abrasive particles and second abrasive particles, wherein the first abrasive particles and second abrasive particles are disposed in predetermined different regions within the polymer bond abrasive article. 
     
     
         3 . The polymer bond abrasive article of  claim 1 , wherein the different regions are layers. 
     
     
         4 . The polymer bond abrasive article of  claim 1 , wherein the abrasive particles comprise at least one of diamond particles or cubic boron nitride particles. 
     
     
         5 . The polymer bond abrasive article of  claim 1 , wherein the abrasive particles comprise at least one of silicon carbide, boron carbide, silicon nitride, or metal oxide ceramic particles. 
     
     
         6 . The polymer bond abrasive article of  claim 1 , wherein the polymer bond abrasive article is chosen from a unitary structured abrasive disc, an abrasive grinding bit, an abrasive segment, and an abrasive wheel. 
     
     
         7 . A polymer bond abrasive article precursor comprising abrasive particles bonded in a polymeric matrix, wherein the polymer bond abrasive article precursor further comprises at least one of at least one tortuous cooling channel extending at least partially through the polymer bond abrasive article precursor; or at least one arcuate cooling channel extending at least partially through the polymer bond abrasive article precursor. 
     
     
         8 . The polymer bond abrasive article precursor of  claim 7 , wherein the abrasive particles comprise at least one of silicon carbide, boron carbide, silicon nitride, or metal oxide ceramic particles. 
     
     
         9 . The method of  claim 8 , wherein the liquid binder precursor material comprises a liquid carrier having a polymer dissolved or dispersed therein.