Title:
NDFEB SYSTEM SINTERED-MAGNET MANUFACTURING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2011/142321
Kind Code:
A1
Abstract:
An NdFeB system sintered-magnet manufacturing apparatus, which fills NdFeB system alloy powder into a mold cavity of a mold with a prescribed packing density, and conducts magnetic field orientation and sintering with the alloy powder filled within the mold cavity, comprises: a first weight-measurement unit (10) for measuring the weight of the mold before filling the alloy powder thereto; a guide mounting section (11) for forming a supplying cavity with a prescribed capacity, by forming a guide on the mold so as to expand the mold cavity; a powder feeding unit (12) for feeding the alloy powder into the supplying cavity so that the amount thereof will become the same as the capacity of the supplying cavity, during which the supplying density thereof is adjusted as well; a filling unit (13) for thrusting the alloy powder in the supplying cavity into the mold cavity, and making the mold cavity more high-density up to the packing density; a second weight-measurement unit (14) for measuring the weight of the mold after filling the alloy powder thereto; and a control unit (15) for calculating the weight of the alloy powder filled into the mold cavity, from the difference between the values measured at the first weight-measurement unit (10) and the second weight-measurement unit (14), and conducting a feedback control of the feeding operation by the feeding means on the basis of that weight.
Inventors:
HAYASHI SHINICHI (JP)
Application Number:
PCT/JP2011/060666
Publication Date:
November 17, 2011
Filing Date:
May 09, 2011
Export Citation:
Assignee:
INTERMETALLICS CO LTD (JP)
HAYASHI SHINICHI (JP)
HAYASHI SHINICHI (JP)
International Classes:
H01F41/02; B22F3/02; B22F3/035; C22C33/02; H01F1/053; H01F1/08
Foreign References:
| JP2006019521A | 2006-01-19 | |||
| JP2004031873A | 2004-01-29 | |||
| JPH0740321A | 1995-02-10 | |||
| JPH1149101A | 1999-02-23 | |||
| JP2011074419A | 2011-04-14 | |||
| JPS5946008A | 1984-03-15 | |||
| JP2006019521A | 2006-01-19 | |||
| JP2009049202A | 2009-03-05 | |||
| JPH1149101A | 1999-02-23 |
Other References:
See also references of EP 2571035A4
Attorney, Agent or Firm:
Kyoto International Patent Law Office (JP)
Patent business corporation Kyoto international patent firm (JP)
Patent business corporation Kyoto international patent firm (JP)
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Claims: