Grinding element for use in rotary grinding or polishing tools

Abstract

Provided is a grinding element for use in rotary grinding or polishing tools used for grinding or polishing surfaces, and of the type comprising an elongate profile rail, including an abrasive cloth and support brushes. The abrasive cloth and the support brushes are mounted in or on the profile rail, such that the abrasive cloth is supported by the support brushes on its inactive side. The abrasive cloth outside the profile rail has a height in the vertical direction and a length in the longitudinal direction. The support brushes and the abrasive cloth have different heights, a support brush height and an abrasive cloth height, respectively, from the profile rail, such that the abrasive cloth is terminated by an outer exposed edge area extending beyond the top of the support brushes and a short distance down along the outer exposed end portions of the support brushes.

1 . A grinding element for use in rotary grinding or polishing tools used for grinding or polishing surfaces and of a type comprising an elongate profile rail and an abrasive cloth and support brushes, and wherein the abrasive cloth and the support brushes are mounted in or on the profile rail, such that the abrasive cloth on its inactive side is supported by the support brushes, wherein the abrasive cloth outside the profile rail has a height of the abrasive cloth in the vertical direction and a cloth length in the longitudinal direction, wherein the support brushes and the abrasive cloth have different heights, a support brush height and an abrasive cloth height, respectively, from the profile rail, such that the abrasive cloth is terminated by an outer exposed edge area extending beyond the top of the support brushes as the height of the cloth exceeds the height of the support brushes and a short distance down along the outer exposed end portions of the support brushes, which outer exposed edge area, when in use, forms an active area of an active side of the abrasive cloth, wherein the abrasive material is applied only to the active area of the abrasive cloth, which abrasive material includes particles, which abrasive cloth is cut from an outer exposed edge of the cloth against the profile rail in a direction parallel to the vertical direction in order to form slats, and which particles are arranged in adjacent rows, wherein the particles of the abrasive material in a row are arranged with the particles offset relative to the particles in adjacent rows, and wherein the particles in the adjacent rows are spaced apart, such that the abrasive particles overlap in the longitudinal direction of the abrasive cloth. 
     
     
         2 . The grinding element according to  claim 1 , wherein the adjacent rows are arranged at an angle different from 0° with respect to the vertical direction. 
     
     
         3 . The grinding element according to  claim 1 , wherein the adjacent rows are arranged with their orientation in the longitudinal direction. 
     
     
         4 . The grinding element according to  claim 1 , wherein the particles have an extension in the orientation of the row, which is greater than the spacing between the particles in the adjacent rows. 
     
     
         5 . The grinding element according to  claim 1 , wherein the abrasive material is a super-abrasive material, which consists of the particles and a powder of diamonds, or similar materials. 
     
     
         6 . The grinding element according to  claim 1 , wherein the active area constitutes between ¼ and ½ of the height of the abrasive cloth. 
     
     
         7 . An abrasive element according to  claim 1 , wherein the abrasive canvas height of the abrasive canvas is between 20 mm and 80 mm. 
     
     
         8 . The grinding element according to  claim 1 , wherein the abrasive material is made to adhere to the abrasive canvas in the active area with a binder, which bonds the particles to the abrasive cloth. 
     
     
         9 . The grinding element according to  claim 1 , wherein the abrasive material is provided on a second cloth, which second cloth is mounted in the active area of the abrasive cloth. 
     
     
         10 . The grinding element according to  claim 1 , wherein the flexibility of the abrasive cloth in an area between the active area and the profile rail is greater than the flexibility of the abrasive cloth in the active area. 
     
     
         11 . The grinding element according to  claim 6 , wherein the active area constitutes about a third of the height of the abrasive cloth. 
     
     
         12 . An abrasive element according to  claim 7 , wherein the abrasive canvas height of the abrasive canvas is about 40 mm.