Abrasive bristle, method for the manufacture thereof, brush with abrasive bristles and method for the surface treatment of a workpiece with a brush having abrasive bristles

Abstract

For the manufacture of an abrasive bristle, a plastic material is melted, and a granular material made of abrasive particles is mixed into the melt. The melt is extruded together with the abrasive particles into a filament, and the filament is subsequently treated and cut up. The plastic material may be a high-temperature-resistant polymer with a continued use temperature of ≧150° C. and for the melt with the abrasive particles to be extruded at a temperature of ≧280° C. A brush equipped with corresponding abrasive bristles can be used for the surface treatment of a workpiece, whereby the brush is rotated with a speed in the range of 3,000 rpm to 12,000 rpm and is brought into contact with the surface to be treated.

1 . A method for manufacture of an abrasive bristle, the method comprising:
 melting a plastic material and mixing a granular material made of abrasive particles into the melt;   extruding the melt with the abrasive particles into a filament; and   treating and cutting the filament, the plastic material comprising a high-temperature-resistant polymer with a continued use temperature greater than or equal to 150° C., and the melt with the abrasive particles being extruded at a temperature greater than or equal to 280° C.   
     
     
         2 . A method in accordance with  claim 1 , wherein the melt with the abrasive particles is extruded at a temperature of 300° C. to 400° C. 
     
     
         3 . A method in accordance with  claim 1 , wherein the plastic material is partially crystalline. 
     
     
         4 . A method in accordance with  claim 1 , wherein the abrasive particles comprise SiC and/or Al 2 O 3  and/or are formed by diamond particles and/or corundum particles and/or ceramic particles and/or boron carbide particles and/or zirconium oxide. 
     
     
         5 . A method in accordance with  claim 1 , wherein the abrasive particles are coated with an adhesive. 
     
     
         6 . A method in accordance with  claim 1 , wherein the abrasive particles are mixed into the melt at a temperature greater than or equal to 280° C. 
     
     
         7 . An abrasive bristle, comprising:
 a plastic material, into which abrasive particles are mixed, said plastic material comprising a high-temperature-resistant material with a continued use temperature greater than or equal to 150° C.   
     
     
         8 . An abrasive bristle in accordance with  claim 7 , wherein the plastic material is partially crystalline. 
     
     
         9 . An abrasive bristle in accordance with  claim 7 , wherein the abrasive particles comprise SiC and/or Al 2 O 3  and/or are formed by diamond particles and/or corundum particles and/or ceramic particles and/or boron carbide particles and/or zirconium oxide. 
     
     
         10 . An abrasive bristle in accordance with  claim 7 , wherein the abrasive particles are coated with an adhesive. 
     
     
         11 . A brush for a surface treatment of a workpiece, the brush comprising:
 a bristle carrier, which carries a bristle filling, whereby the bristle filling has one of bristle filling abrasive bristles and manufactured abrasive bristles, said bristle filling abrasive brittles comprising a bristle filling plastic material, into which bristle filling abrasive particles are mixed, said bristle filling plastic material comprising a high-temperature-resistant material with a continued use temperature greater than or equal to 150° C., said manufactured abrasive bristles being manufactured according to a method, said method comprising melting a manufactured abrasive bristles plastic material and mixing a granular material made of manufactured abrasive bristles abrasive particles into the melt, extruding the melt with the manufactured abrasive bristles abrasive particles into a filament at a temperature greater than or equal to 280° C., and treating and cutting the filament, the manufactured abrasive bristles plastic material comprising a high-temperature-resistant polymer with a continued use temperature greater than or equal to 150° C.   
     
     
         12 . A brush in accordance with  claim 11 , wherein the bristle filling consists entirely of said one of said bristle filling abrasive bristles and said manufactured abrasive bristles. 
     
     
         13 . A method for a surface treatment of a workpiece, the method comprising:
 providing a brush, which has one of brush abrasive bristles and manufactured brush abrasive bristles, said brush abrasive bristles comprising a brush abrasive bristles plastic material and brush abrasive particles, said brush abrasive bristles plastic material comprising a brush abrasive bristles high-temperature-resistant material with a continued use temperature greater than or equal to 150° C., said manufactured brush abrasive bristles being manufactured via a manufacturing method, said manufacturing method comprising melting a manufactured plastic material and mixing a granular material made of manufactured abrasive particles into the manufactured plastic material melt, extruding the melt with the manufactured abrasive particles into a filament at a temperature greater than or equal to 280° C., and treating and cutting the filament, wherein the manufactured plastic material comprises a manufactured high-temperature-resistant polymer with a continued use temperature greater than or equal to 150° C.,   rotating the brush and bringing the brush into contact with the surface to be treated, wherein the brush is rotated with a speed of 3,000 rpm to 12,000 rpm.   
     
     
         14 . A method in accordance with  claim 13 , wherein the brush is rotated with a speed in a range of 5,000 rpm to 9,000 rpm. 
     
     
         15 . A method in accordance with  claim 13 , wherein ends of the bristles are moved with a peripheral speed of 5,000 m/min to 7,000 m/min. 
     
     
         16 . A method in accordance with  claim 13 , wherein the bristle filling of the brush consists entirely of said one of said brush abrasive bristles and said manufactured abrasive bristles.