COATING APPARATUS FOR GRAIN-BOUNDARY DIFFUSION TREATMENT
The present invention aims at providing an applicator for grain boundary diffusion process capable of, when performing a grain boundary diffusion process in the production of a NdFeB system sintered magnet, uniformly applying an R H powder without excess or deficiency onto a predetermined surface of...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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Zusammenfassung: | The present invention aims at providing an applicator for grain boundary diffusion process capable of, when performing a grain boundary diffusion process in the production of a NdFeB system sintered magnet, uniformly applying an R H powder without excess or deficiency onto a predetermined surface of a sintered compact with a given thickness and in a given pattern, the applicator being easily automated and being capable of performing an application operation to many sintered compacts. The applicator for grain boundary diffusion process according to the present invention is composed of a work loader 10 and a print head 20, which is provided above the work loader 10. The work loader 10 includes: a base 11 which can be laterally moved; a lift 12 which can be vertically moved with respect to the base 11; a frame 13 which is placed so as to be attachable to and detachable from the lift 12; a tray 14 which is placed so as to be attachable to and detachable from the frame 13; a supporter 15 which is provided on the upper surface of the tray 14; and a magnetic clamp 16 which is vertically movable. The print head 20 includes: a screen 21 in which a passage section 211 is provided; and a squeegee 22 and a backward scraper 23 which are movable while maintaining contact with the upper surface of the screen 21. |
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