Abstract: In the manufacture of magnetic, plastic bonded molded bodies having different magnetic properties but the same physical dimensions, it has been found that variations in the amount of the magnetic mass constituent result in a change in the shrinkage behavior of the mass during and after shaping. Therefore, the shaping tools must be adapted to compensate for this varied shrinkage behavior. In order to prevent this varied shrinkage behavior, according to the invention, magnetic material in the mass is replaced by nonmagnetic inorganic material having the same or similar shrinkage behavior, the constituent of plastic remaining the same in both cases. Since the ratio of binder to material to be bonded remains constant as regards volume, in the final product, molded bodies having strongly different magnetic properties can be manufactured without having to change the shaping tool.

Abstract: In a method of manufacturing plastic-bonded anisotropic permanent magnets, agglomerates having an easy axis of magnetization in a size from 300 to 1000 .mu.m are used as a magnetic material in a mixture with single magnetic domain particles. In this manner a particularly large packing density of magnetic material in the permanent magnets is obtained. With a filling of the mixture of plastic-binder with magnetic material in the order of approximately 75% by volume, remanence values are realized above 310 mT.