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Powder suplly device, powder supply method and powder compacting device

A technology of powder and powder feeding, which is applied in the direction of magnetic materials, magnetic objects, presses, etc.

Inactive Publication Date: 2004-08-18
HITACHI METALS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thus, even if a metal mesh is provided, there are the same problems as above

Method used

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  • Powder suplly device, powder supply method and powder compacting device
  • Powder suplly device, powder supply method and powder compacting device
  • Powder suplly device, powder supply method and powder compacting device

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Embodiment Construction

[0051] Various embodiments of the present invention are described below with reference to the accompanying drawings.

[0052] Referring now to FIG. 1 , the figure shows a powder molding device 100 having a powder feeding device 10 as an embodiment of the present invention.

[0053] The powder molding device 100 can be used to obtain rare earth magnets, for example, and includes a powder feeding device 10, a molding part 12, a weighing device 14, and a transfer table 16, and the transfer table is arranged so that the powder feeding device 10 can be used in the molding part 12 and Reciprocating motion between weighing devices 14 .

[0054] The forming part 12 includes a machining tool 18 . The processing tool 18 includes a die (die) 22 having a plurality (two in this embodiment) of vertical through holes 20, an upper punch 24 and a lower punch 26 so as to be inserted into the through holes from the upper and lower directions, respectively. 20 in. A cavity 28 is formed in each...

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Abstract

A powder pressing apparatus includes a powder feeding apparatus for supply of a powder such as a rare-earth alloy powder into a cavity of a tooling. The powder feeding apparatus includes a feeder box having a bottom face provided with an opening. Inside the feeder box, there are provided a hopper for supply of the powder into the cavity, a feeder for supply of the powder to the hopper, and a vibration generator for vibration of the hopper. Surfaces of the feeder and hopper to contact the powder are mirror-polished. Leg portions are provided in two sides of the bottom face parallel to a moving direction of the feeder box. The leg portions make the bottom face of the feeder box spaced from an opening of the cavity. The powder supplied to the powder feeding apparatus is weighed by a weighing unit. The opening of the feeder box is provided with a linear member arranged in a grid pattern having a regular pitch. The linear member is rotationally shaken in a horizontal plane when the powder is fed into the cavity. The linear member is shaken in a stroke greater than the pitch at which the linear member is arranged.

Description

technical field [0001] The present invention relates to a powder feeding device, a powder feeding method and a powder molding device, in particular to a device and method for filling powder into a tool cavity for powder molding for manufacturing rare earth magnets. Background technique [0002] In the manufacture of rare earth magnets, for example, a rare earth alloy raw material is first ground into powder, and then the processes of molding compaction, sintering, aging treatment and surface processing are carried out before a final sintered magnet is made. In the above process, the uniformity and accuracy of powder feeding in the molding steps are of great significance to the coercive force, residual magnetic flux density and dimensional accuracy of the product. When the amount of powder supplied is very inconsistent, correspondingly, the coercive force, residual magnetic flux density and dimensional accuracy will also be very inconsistent. Therefore, in order to overcome ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/00B30B15/30H01F1/057H01F41/02
CPCH01F41/0253B22F3/004B30B15/304H01F1/0577
Inventor 小川笃史田村敏昭
Owner HITACHI METALS LTD