Experimental study of distribution of magnetic flux in rectangular soft-contact mold

In order to get the rectangular soft-contact mold with reasonable structure, the distribution of magnetic flux density was investigated experimentally. The results show that the electromagnetic flux overlap aooears distinctly at the corner of rectangular soft-contact mold. The distribution of magnetic flux density along narrow face is more uniform than that along the wide face of soft-contact mold. By reasonably controlling and adjusting slits position, the magnetic flux density and its uniformity can be improved synchronously. The slits position along width face should be arranged non-uniformly, and the distances between slits in the midst of width face are smaller than those near corner. The slit should not be arranged at the corner of soft-contact mold. The maximum magnetic flux density is located slightly above the center of coil, moreover, as the coil position sets upward, the maximum value of magnetic flux density increases and its location rises upward to the top of mold. The magnetic flux density along the circumference becomes larger and more uniform with rising coil up to the top of mold. The magnetic flux density is uniform near the center of coil, therefore, the meniscus level in mold should locates between the coil center and the top of mold in casting operation.