Rubber mold for producing powder compacts

Details Rubber mold for producing powder compacts Rubber mold for producing powder compacts

1996-04-18

1998-06-09

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

With direct application of magnetic force to manipulate...

249134, 264108, 425DIG33, 425DIG44, B29C 4517

Patent

active

057629676

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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patent: 3400180 (1968-09-01), Buttner et al.
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patent: 4661053 (1987-04-01), Yokota et al.
patent: 5135375 (1992-08-01), Matsuo et al.
patent: 5446428 (1995-08-01), Kumeji et al.

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