Shrinkage calibration method for μPIM manufactured parts

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Five green and five sintered parts of a micro mechanical component, produced by micro powder injection moulding, were measured using an optical coordinate measuring machine. The aim was to establish a method for quality assurance of the final produced parts. Initially, the so called “green” parts were compared with the sintered parts (final products) calculating the percentage of shrinkage after sintering. Successively, the expanded uncertainty of the measured dimensions were evaluated for each single part as well as for the overall parts. Finally, the estimated uncertainty for the shrinkage was evaluated propagating the expanded uncertainty previously stated and considering green and sintered parts correlated. Results showed that the proposed method can be effective instating tolerances if it is assumed that the variability on the dimensions induced by the shrinkage equals the propagated expanded uncertainty.
Original languageEnglish
Title of host publicationProceedings. 11th International Conference on Micro Manufacturing
Number of pages6
Publication date2016
Article numberPaper 20
Publication statusPublished - 2016
Event11th International Conference on Micro Manufacturing - University of California, Irvine, Orange County, United States
Duration: 29 Mar 201631 Mar 2016
Conference number: 11


Conference11th International Conference on Micro Manufacturing
LocationUniversity of California, Irvine
Country/TerritoryUnited States
CityOrange County
Internet address


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