A Life Cycle Engineering model for technology selection: a case study on plastic injection moulds for low production volumes

Peças, Paulo; Ribeiro, Inês; Folgado, R.; Henriques, Elsa

doi:10.1016/j.jclepro.2009.01.001

Cited by 64 publications

(20 citation statements)

References 28 publications

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“…For example, Peças et al compared the effect of conventional molds and rapid-tooling molds, and suggested a global evaluation method based on the lifecycle assessment of the overall injection-molding process. 97 Local conditions also have a marked effect on decision making, such as the cost of electricity or wage costs. However, modeling and assessment of the process should take precedence.…”

mentioning

confidence: 99%

A comparison of energy consumption in bulk forming, subtractive, and additive processes: Review and case study

Yoon

Lee

Kim

et al. 2014

Int. J. of Precis. Eng. and Manuf.-Green Tech.

273

109

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In addition to the steps taken to ensure optimal efficiency in industry, significant effort has been directed towards the green and sustainable manufacturing practices. In this paper, we review conventional and state-of-the-art manufacturing technologies to provide insight into energy consumption at the processing level. In the review, collected energy data were summarized for three manufacturing categories: conventional bulk-forming, subtractive, and additive manufacturing (AM) processes. Additive processes, in particular, are strongly emphasized in the Advanced Manufacturing Initiatives proposed recently by the United States government. Currently, the specific energy consumption (SEC) of additive processes is estimated to be ~100-fold higher than that of conventional bulk-forming processes, with subtractive processes showing intermediate values that varied over a wide range in terms of scale. Although SEC may vary with respect to the details, in general, the research showed a negative correlation with respect to the reciprocal logarithmic form of the productivity. In addition to the literature review presented, we performed case studies for the three manufacturing processes, to provide practical examples of energy consumption. Additionally, our results indicated that AM processes may require more extensive evaluation; i.e., an assessment of the entire manufacturing cycle, for more accurate prediction of the subsequent environmental impact.

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mentioning

confidence: 99%

A comparison of energy consumption in bulk forming, subtractive, and additive processes: Review and case study

Yoon

Lee

Kim

et al. 2014

Int. J. of Precis. Eng. and Manuf.-Green Tech.

273

109

View full text Add to dashboard Cite

show abstract

“…The term , in equation 5 is the machine efficiency regarding melting and filing the plastic into the mould. According to some authors, injection machine efficiency is between 70 and 90% [4,5]. This value depends on the machine used, as already explained.…”

Section: Thermodynamic-empirical Modelmentioning

confidence: 91%

“…Products ranging from automobiles, to personal computers, to toys all use injection moulded plastic parts [2]. According to some studies, the energy consumption during injection moulding process is low when compared with material and machine cost [3,4]. Still, although in a first glance injection moulding may appear a benign process regarding energy consumption, the large scale of this process makes its impacts especially critic and a minor efficiency improvement may lead to substantial energy savings [5].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Energy Consumption in Injection Moulding Process

Ribeiro

Peças

Henriques

2012

Leveraging Technology for a Sustainable World

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Injection moulding may appear to be a benign process regarding energy consumption. However, the large scale of this process makes its impacts especially critic and minor efficiency improvements may lead to high overall energy savings. Moreover, energy consumption affects not only the product manufacturing costs, but is also a critical component in any overall sustainability strategy. This paper presents a model that estimates in an early phase of the design of a plastic part the energy consumption during its manufacturing. This enables estimating the energy consumption for different part geometries and different machines and process conditions prior to the production phase. Moreover, this paper contributes in integrating thermodynamic fundamentals and empirical relations fostered by literature review and an experimental analysis developed in an injection moulding company. In the end the thermodynamic/empirical model is validated by comparing its results for several parts with the measured real energy consumption.

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“…Krozer, 2006) and Life Cycle Engineering (e.g., Asiedu and Gu, 1998) are used to guide engineers and designers in making more informed decisions during product development and to achieve an optimum between cost and environment. Examples of LCE application include the material selection process for an automotive fender application (Ribeiro et al, 2008) and the selection of a mold manufacturing method (Pecas et al, 2009).…”

Section: Environmental Impact Assessment and Life Cycle Assessmentmentioning

confidence: 99%

Assessing sustainability and value of manufacturing processes: a case in the aerospace industry

Hallstedt

Bertoni

Isaksson

2015

Journal of Cleaner Production

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a b s t r a c tIn spite of the growing awareness and significance of accounting for sustainability aspects in product development, design decision support is still immature in this end compared to other decision support areas, such as product performance and manufacturability. This paper proposes a novel decision support method that combines qualitative sustainability assessment techniques with a quantitative analysis, without losing transparency and still covering a full sustainability perspective. The aim is to contribute to an understanding for how to enable value assessment of sustainability issues already in early product development situations. The method, named Sustainability Assessment and Value Evaluation, combines two qualitative sustainability assessment techniques with a quantitative Net Present Value analysis based on alternative future scenarios. A case study, related to the development of a new hightemperature aero-engine component, illustrates both how the sustainability assessment identifies hotspots and clarifies potential sustainability consequences for a new product technology, and how Net Present Value is used to assess alternative solution strategies based on the hotspot, to facilitate early stage decision-making in design. The paper argues that the method serves two main purposes: i) to make sustainability consequences more concrete and understandable during design concept selection activities, rather than to have an exact measurement, and ii) to simplify and prioritize, systematically asking what is important in the sustainability analysis, rather than to reduce the sustainability problem. The method allows undertaking the sustainability assessment in a more structured way than what happens today in preliminary design, through scenario building based on socio-ecological assessments, including back-casting to cover the longer time perspective. In addition, the Sustainability Assessment and Value Evaluation-method provided the design team of a means for displaying sustainability consequences on an equal basis with other decision support tool results.

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A Life Cycle Engineering model for technology selection: a case study on plastic injection moulds for low production volumes

Cited by 64 publications

References 28 publications

A comparison of energy consumption in bulk forming, subtractive, and additive processes: Review and case study

A comparison of energy consumption in bulk forming, subtractive, and additive processes: Review and case study

Assessment of Energy Consumption in Injection Moulding Process

Assessing sustainability and value of manufacturing processes: a case in the aerospace industry

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