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This technology combines the advantages of plastic
injection molding (geometric design freedom) with the advantages offered by
powder metallurgy (processing of demanding, hardly machinable or unmachinable,
sometimes even uncastable, structural and functional materials). With this
technology, it is possible to manufacture complicated, ready-for-installation
metallic molded parts with greatest reproducibility and a wide variety of
material properties in series.
This overview focuses on the technological chain
spanning from feedstock (plastified powder comprising metallic powder and
binding system), the "green" part and the "brown" part through to the sintered
part.  |
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Injection molded part with approx. 10 weight percent of
binder.
Properties:
- High density,
- Homogeneous powder
distribution,
- No alignment of powder
particles.
These properties result in a symmetrical reduction and a
higher component density, which is a prerequisite for gastight sintered
parts. |
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With the dissolution of the first binding components, the
so-called matrix, the green part transforms into the porous brown part that
still has to be sintered. |
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The resulting component is free of binders and
consolidated by way of sintering such that it is with close tolerances in terms
of dimensions and ready for installation.
Properties:
- Observance of
close
tolerances,
- Density of 97% of
the
theoretical density,
- Round, separate,
yet
uniformly distributed
micropores
- No
cracking as a result of
micropores. |
