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4. Advantage
The debinding step is a crucial stage in the manufacture of parts using the PIM process. During this stage, the thermoplastic binder is removed by a process adapted to its nature.
This operation must be perfectly controlled, as it can cause damage to the part. Poorly controlled degradation of the binder can lead to cracking-type defects, as well as chemical pollution from carbon residues.
4.1 Different techniques
Debinding parameters (temperature, atmosphere, etc.) depend not only on the nature of the binder, but also on the nature of the powder (metallic or ceramic).
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The main debinding techniques are :
thermal degradation ;
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Sintering
Bibliography
Events
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Congress organized by EPMA: EuroPM, held every year in Europe
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Congress organized by the Metal Powder Industries Federation: PowderMet takes place every year in the USA
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Patents
SCHWARTZWALDER (K.), Refractory body and method of making same, US Patent 2122960 (1938).
SMITH (D.J.), SHAPPIE (T.B.), SANFORD (R.A.), LIESZ (R.J.), Tungsten-carbide articles made by metal injection molding and method, US Patent 6790252 (2004).
MIYASHITA (T.), UENO (Y.), NISHIO (H.), KUBODERA (S.), Method for removing the dispersion medium from a molded pulverulent material, US...
Directories
Manufacturers – Suppliers – Distributors (non-exhaustive list)
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Feedstocks
BASF
Polymer Chemie
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Statistical and economic data
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Breakdown of sales between MIM and CIM industries
Data taken from German's work [6], see figures 1 and
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