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Quality requirements of the permanent magnetic ferrite tile product
Dec 11, 2017

At present, the domestic production of the permanent magnetic ferrite tile product can use different process methods. But the main production process is powder metallurgy process. That is to say, in the actual production, it is necessary to grind the raw materials first, then the compression moulding should be carried out, then sinter at high temperature, and finally surface grinding.

 

Analyzing from the above production process , because the permanent magnetic ferrite tile product in the process of high temperature sintering may produce larger shrinkage, in the design of the mold, mold quality control is very critical. If the mold design is not good, the tile product will be severely deformed after sintering shrinkage, which will be greatly different from the required design shape.

 

More seriously, this will also affect the overall quality of production. Therefore, in the actual production, on the one hand, we need to strengthen the management and control of the whole production quality. On the other hand, we need to strengthen the permanent magnetic ferrite tile product quality inspection and reduce the unqualified products. In the inspection, it mainly inspects the size, shape and surface roughness of the product.

 

Under normal circumstances, the surface of the permanent magnetic ferrite tile product should not appear any scattered evacuation ferrite particles or other attachments. In addition, the dimensional tolerance of the product must be controlled within the specified range. Moreover, the roughness of the grinding surface of the tile magnet should not be less than 3.2 μ m, and the roughness of the non-grinding surface of the tile magnet should also be controlled within the standard dimensional tolerance.

 

In addition, the geometric tolerance of the permanent magnetic ferrite tile product should meet the requirements of the product drawings provided by the user. In general, on the same the permanent magnetic ferrite tile product, its defects should not be more than two types.

 

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