Forming one inductor
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In the production process of integrated forming inductors, if the proportion of powder is improper, it may cause poor adhesion, so it will be easy to crack. This crack is also graded, if only the surface has a grain and the inductance performance does not affect, the use of no change with normal products, reliability verification can be used normally, we can be classified as second-class good products. However, if it is found that the inside has cracked, it is a defective product, and this kind of product can not be used normally! As for how to check whether the inside is cracked, we can use the grinding section or X-ray inspection method to confirm.
Integrated forming inductance cracking this problem, I believe that many friends have encountered. Inductance cracking is related to powder and equipment, as well as coil inductance outer diameter. Inductance cracking caused by excessive pressure of molding machine equipment; Such cracks will affect the electrical performance of the product, and there will be a risk of deterioration after long-term work, and such products can be judged as defective products.
Cracks caused by poor adhesion due to improper powder ratio, only the surface has lines and the electrical properties are no different from normal products, after reliability verification, can be classified as second-class good products, if there is cracking inside (grinding section or X-ray inspection), can be judged as defective products;
Due to copper wire stress caused by the product side cracks, can be done grinding section or X-ray inspection, can be judged as defective products. To determine the cause of inductance cracking, we must first look at the quality of the product fracture surface, and judge whether it is cracking before or after the furnace. And then through other known factors to judge the cause of cracking, so that you can be the right medicine, completely solve the problem of cracking.
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