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On increasing the uniformity of mixture by mesh

2019-12-05
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The deformation of the resin grinding wheel of Dalian mesh is a difficult problem that has puzzled the manufacturers of the resin grinding wheel for a long time. The root cause of the deformation is the uneven organization of the effective area of the grinding wheel, which results in the uneven stress in the hardening process of the product. Resin grinding wheel manufacturers should pay attention to the impact of environmental climate on the production of grinding wheel, and timely formulate countermeasures.


Reasonable selection of the appropriate phenolic resin varieties, increase the homogeneity of the mixture, timely and reasonable adjustment of the hardening process to make it more suitable for the complete hardening of phenolic resin. Too coarse or too fine binder particles: it is generally believed that the size of the binder should be fine, which is conducive to the uniform distribution of the binder.


If the grains are too coarse, the molding material is not easy to mix evenly, which affects the hardness and strength of the grinding wheel. As a result, the hardening of resin grinding wheel deviates from the set hardening specification (hardening curve), and the quality of hardening (hardening) of grinding wheel is not fully guaranteed. Processing procedure (mainly large diameter and high thickness resin grinding wheel): resin grinding wheel, especially large diameter and high thickness, or grinding wheel with strict dimensional tolerance shall be processed after hardening.


In order to ensure the geometric dimension and geometrical tolerance of grinding wheel. First of all, the bonding performance of the mesh (including the volatile content of the mesh) should be taken into consideration for the lamination of the grinding disc. If the type of impregnated glue of the mesh is not compatible with the phenolic resin used for the production of resin grinding wheel, the glue content is not enough, or the volatile content of the mesh is too high, the lamination of the grinding disc will be caused.


Resin grinding wheel is a complex system composed of a variety of main and auxiliary raw materials. As long as the materials are abrasives and binders, auxiliary materials include fillers, reinforcement materials, colorants, etc. Because the liquid phenolic resin is very unstable, even at room temperature, the technical indicators will change.


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