Grinding disk having plant seed capsules as a filler and method for the production thereof

Abstract

The invention relates to a synthetic-resin-bonded grinding disk comprising a mixture of abrasive grain, binding agent, and pore formers, wherein the pore formers are plant seeds and are contained in the finished grinding disk. The grinding disk is composed of 60 to 90 wt % of abrasive grain and 10 to 40 wt % of a binding agent, wherein the plant seeds constitute up to 80 wt % of the binding agent. The plant seeds can contain oil and can be rape seeds, poppy seeds, clover seed, lupin seeds, mustard seeds, serradella vetch seeds, or similar plant seeds. The grinding disk can be produced by mixing abrasive grain, binding agent, and plant seeds, pouring the starting mixture into a mold provided therefor, pressing the mixture, pre-drying the mixture, and curing the grinding disk. The plant seeds are not burned in the production of the grinding disk. The grinding disk is cured at temperatures of up to 250° C., preferably of up to 200° C., more preferably of up to 180° C., and more preferably of up to 150° C.

1 . Resin-bonded abrasive disk, containing a mixture of abrasive grain, binder and pore former, wherein the pore formers are plant seeds, and wherein the finished abrasive disk contains the plant seeds. 
     
     
         2 . Abrasive disk according to  claim 1  which comprises 60 to 90 wt.-% of abrasive grain and 10 to 40 wt.-% of binder. 
     
     
         3 . Abrasive disk according to  claim 2 , wherein the plant seeds account for up to 80 wt.-% of the binder. 
     
     
         4 . Abrasive disk according to  claim 1 , wherein the abrasive grain is corundum, silicon carbide, chromium oxide, cubic boron nitride, diamond, silicon oxide, zirconium oxide, garnet and emery, or mixtures thereof. 
     
     
         5 . Abrasive disk according to  claim 1 , wherein the size of the abrasive grains is in the range of from 105 μm to 2830 μm, preferably in the range of from 250 μm to 2830 μm. 
     
     
         6 . Abrasive disk according to  claim 1 , wherein the plant seeds contain oil. 
     
     
         7 . Abrasive disk according to  claim 1 , wherein the plant seeds are rape, poppy, clover, lupine, mustard, serradella or vetch seeds or similar plant seeds. 
     
     
         8 . Abrasive disk according to  claim 1 , wherein the binder is a liquid or powdery resin, for example polyimide, phenolic resin, epoxy resin, unsaturated polyester. 
     
     
         9 . Abrasive disk according to  claim 1 , which contains a reinforcement, in particular a glass-fibre cloth reinforcement. 
     
     
         10 . Method of producing an abrasive disk according to  claim 1  which comprises the following steps: mixing of abrasive grain, binder and plant seeds, pouring of the starting mixture into a mould provided for it, pressing of the mixture and hardening of the abrasive disk, wherein the plant seeds are not burned when producing the abrasive disk. 
     
     
         11 . Method according to  claim 10 , wherein pressing of the mixture takes place under contact pressures of from 15 to 45 N/mm 2 , preferably from 20 to 35 N/mm 2 , even more preferably of from 30 N/mm 2  to produce a green perform. 
     
     
         12 . Method according to  claim 10 , wherein the pressing time lies in the range of 1 to 100 seconds, preferably 5 to 50 seconds. 
     
     
         13 . Method according to  claim 10 , wherein the abrasive disk is hardened at temperatures of up to 250° C., preferably of up to 200° C., even more preferably of up to 180° C. and in particular of up to 150° C. 
     
     
         14 . Method according to  claim 10 , wherein the hardening of the abrasive disk lasts 5 to 40 hours, preferably 10 to 30 hours and even more preferably 15 hours.