A process for the production of injection molded plastic bonded permanent magnet of a thermosetting plastic, which contains a particulate magnetic material, as well as a process for producing an injection-molded plastic bonded permanent magnet of a thermosetting plastic, which contains a particulate magnetic material, as a two - components - component and the injection molded of plastic-bound permanent magnet

摘要

A process for producing an injection-molded plastic bonded permanent magnet of a thermosetting plastic (55), which contains a particulate magnetic material, comprising the steps of:a) providing a tool (10) for injection molding with a cavity (20), wherein the tool (10) a magnetic body (30) as well as a to the cavity (20) adjacent wall region (40), and the wall region (40) by means of a heating device (50) is formed at least in sections, can be heated;b) injection of thermoset (55), which the particulate magnetic material contains, in the flowable state into the cavity (20);c) applying a of the desired magnetization corresponding directional magnet field to generate a preferred magnetic direction to the thermosetting plastic (55) with the aid of the magnetic body (30), wherein during the duration of at least one of the steps b) or c) an active cooling of the wall region (40) is carried out;d) the end of the active cooling of the wall region (40);e) heating of the wall region (40) to crosslinking temperature of the thermoset (55) with the aid of the heating device (50), as long as to the crosslinking of the thermoset (55) is completed;f) switching off of the heating device (50) or reducing the temperature of the wall region (40) to a predetermined temperature below the crosslinking temperature by means of the heating device (50);g) allowed to solidify of the injected thermoset (55); andh) from the removal of the solidified thermoset (55).