文章基本信息

标题：Optimization of machine downtime in the plastic manufacturing
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作者：S.C. Nwanya ; J.I. Udofia ; O.O. Ajayi 等
期刊名称：Cogent Engineering
电子版ISSN：2331-1916
出版年度：2017
卷号：4
期号：1
页码：1335444
DOI：10.1080/23311916.2017.1335444
语种：English
出版社：Taylor and Francis Ltd
摘要：Abstract Reduction of downtime has a considerable effect in improving productivity and is a prerequisite for a profitable and flexible production. This study estimated the total production downtime for each production line per shift and developed an algorithm for an uptime maximization. A case study was conducted on one of the leading Nigerian plastic manufacturing firms experiencing a decline in its production efficiency. Robust interview sessions supplemented with well structured questionnaire were used for data gathering. The data on machine maintenance effectiveness and process pit-stop were evaluated followed by self-criticism of shortcomings of the results. Also, a factory layout of the company was obtained to highlight some issues involving material movement to the plant floor. A multiple regression analysis was also used to compare downtime and other variables such as cycle time, capacity, weight, overall equipment effectiveness (OEE). From the optimization model, uptime was maximised by 332 min per shift operation thereby reducing the downtime. This result showed remarkable increment in production rate for different categories of product, which increased by 140, 120, 120, 240 and 90 pieces, respectively, after optimization. The developed algorithm can be used to optimize production in any manufacturing concern and for reducing capacity losses.
关键词：downtime ; plastic manufacturing ; injection moulding ; planned maintenance ; process pit-stop