Preparation device and method of ceramic coating on a sintered type NdFeB permanent magnet

A preparation device for ceramic coating on a sintered NdFeB permanent magnet, the preparation device comprising a holding barrel, a pump body, a spraying system, and a fixture mechanism,

• wherein the pump body is connected with the holding barrel and the spraying system and the spraying system is located above the fixture mechanism and there is a distance between the spraying system and the fixture mechanism;
• the fixture mechanism is connected with a recovery bucket through a pipeline, and the recovery bucket is connected with the holding barrel through the pipeline;
• the spraying system comprises a nozzle, wherein the inlet of the nozzle is connected with the pipeline of the pump body;
• the fixture mechanism comprises a support plate, an upper recovery trough plate and a lower recovery trough plate, wherein the lower recovery trough plate is located above the support plate, the lower recovery trough plate is symmetrically arranged on both ends of the upper recovery trough plate;
• and
• the outlet of the nozzle is located above a containment space of the spraying system.