Rubber mold for producing powder compacts
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United States of America Patent
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Jun 9, 1998
Grant Date -
N/A
app pub date -
Apr 18, 1996
filing date -
Apr 18, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A elastically and reversibly deformable rubber mold for producing powder compacts is made of a material at least a part of which is a mixture of rubber and magnetic powder. In use, this rubber mold filled with the magnetic powder and subjected to a magnetic field and pressure with punches, thereby compressing the powder to form powder compact. This makes the distribution of magnetic field in the cavity of the rubber mold more homogeneous, and therefore, the distortion, cracking and chipping caused by inhomogeneity of the distribution of the magnetic field are reduced, so that the shape of the resultant powder compact is closer to the end product.
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