Applications of dimensional micro metrology to the product and process quality control in manufacturing of precision polymer micro components

Precision manufacturing of micro injection moulded (mIM) components presents challenges in terms of quality control due to the miniaturization of product dimensions and tolerances. This paper addresses product compliance with specifications, focusing on tolerances of dimensions and position on mIM components selected from industrial production. Two systems were analysed: a tactile coordinate measuring machine (CMM) with sub-micrometer uncertainty and an optical CMM allowing fast measurements suitable for in-line quality control. Product quality control capability, measuring uncertainty and calibration guidelines are discussed for both systems. Finally, a new approach for the manufacturing of hybrid micro polymer–metal calibrated objects is proposed.