Method for making ndfeb sintered magnet and mold for making...

H - Electricity – 01 – F

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

H01F 41/02 (2006.01) B22F 3/10 (2006.01) H01F 1/053 (2006.01) H01F 1/08 (2006.01)

Patent

CA 2696700

The objective of the present invention is to provide a method for making a NdFeB sintered magnet without an occurrence of a curve or deformation, by using a mold which is inexpensive, easy to be machined, and will not be embrittled. The present invention also provides such a mold. In the present invention, at least a part (e.g. a bottom plate 11) in the mold is made of a carbon material. This enables a production of a NdFeB sintered magnet without an occurrence of a curve or deformation caused by a friction due to a sintering shrinkage, because the friction between a carbon material and a sintered compact in a sintering process is lower than that between metal and a sintered compact. What is more, a carbon material is advantageous in that it is inexpensive, easy to be machined, and will not be embrittled even after repeated uses of the mold. Such effects can be particularly obtained by using a carbon material as the bottom plate 11, which is subjected to the load of the sintered compact in the sintering process.

L'invention concerne un moule qui est peu coûteux et facile à traiter et ne se fragilise pas. L'invention concerne aussi un procédé par lequel un aimant NdFeB fritté peut être fabriqué à l'aide du moule sans souffrir de flexion ou de déformation. Au moins une partie (par exemple, une plaque de fond (11)) du moule est faite d'un matériau carboné. Les matériaux carbonés ont une plus faible friction avec un aggloméré durant le frittage que des métaux. Le moule permet donc de fabriquer un aimant NdFeB fritté sans souffrir de la flexion ou déformation causée par une friction due au retrait de frittage. Des matériaux carbonés sont peu coûteux et faciles à traiter. Le moule ne se fragilise pas même lorsqu'il est utilisé de façon répétée. Ces effets peuvent être produits de façon significative lorsqu'un matériau carboné est utilisé en tant que plaque de fond (11), sur laquelle la charge de l'aggloméré est imposée durant le frittage.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Method for making ndfeb sintered magnet and mold for making... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for making ndfeb sintered magnet and mold for making..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for making ndfeb sintered magnet and mold for making... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1618976

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.