Functional Analysis Validation of Micro and Conventional Injection Molding Machines Performances Based on Process Precision and Accuracy for Micro Manufacturing

Micromachines

Marco Santochi¹  Gualtiero Fantoni¹  Guido Tosello²  HansNørgaard Hansen²  Matteo Calaon²  Federico Baruffi²  Ilenia Cirri³ 

[1] Department of Civil and Industrial Engineering, University of Pisa, Largo Lucio Lazzarino 2, 56126 Pisa, Italy;Department of Mechanical Engineering, Technical University of Denmark, Building 427A, Produktionstorvet, DK-2800 Kgs Lyngby, Denmark;Erre Quadro s.r.l., Largo Padre Renzo Spadoni c/o Cittadella Galileiana, 56126 Pisa, Italy;

关键词: functional analysis;    micro-injection moulding;    machine design;    process capability;   

DOI  :  10.3390/mi11121115

来源: DOAJ

【 摘 要 】

Micro polymer parts can be usually manufactured either by conventional injection moulding (IM) or by micro-injection moulding (µIM). In this paper, functional analysis was used as a tool to investigate the performances of IM and µIM used to manufacture the selected industrial component. The methodology decomposed the production cycle phases of the two processes and attributed functions to parts features of the two investigated machines. The output of the analysis was aimed to determine casual chains leading to the final outcome of the process. Experimental validation of the functional analysis was carried out moulding the same micro medical part in thermoplastic elastomer (TPE) material using the two processes by means of multi-cavity moulds. The produced batches were assessed using a precision scale and a high accuracy optical instrument. The measurement results were compared using capability indexes. The data-driven comparison identified and quantified the correlations between machine design and part quality, demonstrating that the µIM machine technology better meets the accuracy and precision requirements typical of micro manufacturing productions.

【 授权许可】

Unknown