Patent ID: 8298469
Filing Date: 2012-10-30
Classification: H01F,Y02E,Y10T

Abstract:
1. A method for manufacturing sintered magnet poles, comprising: providing a mould having a first opening; filling a vitrifiable randomly oriented base material powder into the mould through the first opening; closing the first opening with a plate; placing the mould with the randomly oriented powder into a magnetic field to align the randomly oriented powder into aligned powder; pressing the plate onto the aligned powder to establish a compact that holds the alignment of the aligned powder in place; sintering the compact while the compact is oriented over the plate inside the mould to form a sintered magnet pole that adheres to the plate as a result of the sintering process, wherein a gap is formed between the sintered magnet pole and the mould due to shrinkage of the compact during sintering; simultaneously pressing the mould inside a die during sintering, wherein the mould is initially provided in a rough shape, and wherein the rough shape is converted to a final shape as a result of said pressing; quenching and then heat treating the sintered magnet pole; fixing the mould to the plate before or after quenching or heat treatment; introducing a filling material into the gap by vacuum injection after fixing the mould to the plate; and using the protective cover and base plate as part of the final product, wherein the mould ultimately forms a protective cover of the sintered magnet pole and the plate ultimately forms a base plate of a magnet pole piece.