Quantitative analysis of the effects of incorporating laser powder bed fusion manufactured conformal cooling inserts in steel moulds over four types of defects of a commercially produced injected part
Visualitza/Obre
Cita com:
hdl:2117/384931
Tipus de documentArticle
Data publicació2023-03
EditorElsevier
Condicions d'accésAccés obert
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
:
Reconeixement-NoComercial-SenseObraDerivada 4.0 Internacional
Abstract
The introduction of additively manufactured conformal cooling inserts in steel moulds for plastic injection is becoming a recommended standard. Fine adjustment of the temperatures in the mould has demonstrated potential to reduce cycle times and to increase production volumes. Within this context, the present article explores the historical production data of a commercially produced part, before and after the incorporation of an LPBF conformal cooling insert, to analyse what is the quantitative real effect on the efficiency of the production runs. The article analyses the change in the global rejection rates, and its effect over four different product defect types, i.e.: optical (surface), part integrity (bubbles, transparency, geometry), incomplete fill-in (interior), and breakages during extraction. The results demonstrate a specific decrease on the average appearance (from 20.53% to 13.48%; reduction of 7.05%) and variability (standard deviation from 14.16% to 6.81%; reduction of a 7.35%), of the global scrap rates, and a significant decrease in the scrap rates generated by optical defects and extraction part breakages. The article also characterises the former and the new processes by adjusting two distribution functions (Pareto Type-I and Weibull) and compares different estimates for the global expected scrap rates in past and future production runs.
CitacióMinguella-Canela, J. [et al.]. Quantitative analysis of the effects of incorporating laser powder bed fusion manufactured conformal cooling inserts in steel moulds over four types of defects of a commercially produced injected part. "Journal of materials research and technology", Març 2023, vol. 23, p. 5423-5439.
ISSN2238-7854
Versió de l'editorhttps://www.sciencedirect.com/science/article/pii/S2238785423003976
Col·leccions
- Departament d'Enginyeria mecànica - Articles de revista [596]
- CREMIT - Centre de Recerca de Motors i Instal·lacions Tèrmiques - Articles de revista [48]
- Departament de Màquines i Motors Tèrmics - Articles de revista [472]
- TECNOFAB - Grup de Recerca en Tecnologies de Fabricació - Articles de revista [206]
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
1-s2.0-S2238785423003976-main (1).pdf | Article tal com està penjat a la web d'Elsevier | 2,645Mb | Visualitza/Obre |