Dimensional Stability and Process Capability of an Industrial Component Injected with Recycled Polypropylene
The usage of recycled polymers for industrial purposes arises as one of the most promising methods of reducing environmental impact and costs associated with scrapping parts. This paper presents a systematic study of the dimensional stability of a raw and 100% recycled polypropylene subjected to rea...
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doaj-bc6e95daadd04ac181e4c779f94acd162020-11-25T01:16:08ZengMDPI AGPolymers2073-43602019-06-01116106310.3390/polym11061063polym11061063Dimensional Stability and Process Capability of an Industrial Component Injected with Recycled PolypropyleneJosé Eduardo Galve0Daniel Elduque1Carmelo Pina2Isabel Clavería3Raquel Acero4Ángel Fernández5Carlos Javierre6BSH Electrodomésticos España, S.A., Avda. de la Industria, 49, 50016 Zaragoza, Spaini+AITIIP, Department of Mechanical Engineering, University of Zaragoza EINA, Maria de Luna 3, 50018 Zaragoza, SpainBSH Electrodomésticos España, S.A., Avda. de la Industria, 49, 50016 Zaragoza, Spaini+AITIIP, Department of Mechanical Engineering, University of Zaragoza EINA, Maria de Luna 3, 50018 Zaragoza, SpainDepartment of Design and Manufacturing Engineering, University of Zaragoza EINA, Maria de Luna 3, 50018 Zaragoza, Spaini+AITIIP, Department of Mechanical Engineering, University of Zaragoza EINA, Maria de Luna 3, 50018 Zaragoza, Spaini+AITIIP, Department of Mechanical Engineering, University of Zaragoza EINA, Maria de Luna 3, 50018 Zaragoza, SpainThe usage of recycled polymers for industrial purposes arises as one of the most promising methods of reducing environmental impact and costs associated with scrapping parts. This paper presents a systematic study of the dimensional stability of a raw and 100% recycled polypropylene subjected to realistic environmental conditions occurring along its working life. The component studied is an internal part of an induction hob assembly. Industrial samples manufactured with both materials, in the same mold, and in the same injection machine, are subjected to ejection conditions, storage conditions (50 °C), and extreme performance conditions (80 °C). Induced dimensional changes are registered and analyzed using a coordinate measuring machine, and a tactile sensing probe. To verify the process capability of the samples manufacturing, <i>C</i><sub>p</sub> and <i>C</i><sub>pk</sub> values are calculated to evaluate the suitability of the recycled material as an alternative. Results conclude that, although the use of recycled material implies slight differences in terms of dimensional stability due to the changes induced in the polymer structure, these differences are not significant enough to affect the injection process capability. Therefore, recycling arises as one effective method to reduce both overruns associated with the consumption of raw polypropylene material and its environmental impact.https://www.mdpi.com/2073-4360/11/6/1063polypropylenedimensionalinjectionrecycledprocess capabilitywarpageshrinkage |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
José Eduardo Galve Daniel Elduque Carmelo Pina Isabel Clavería Raquel Acero Ángel Fernández Carlos Javierre |
spellingShingle |
José Eduardo Galve Daniel Elduque Carmelo Pina Isabel Clavería Raquel Acero Ángel Fernández Carlos Javierre Dimensional Stability and Process Capability of an Industrial Component Injected with Recycled Polypropylene Polymers polypropylene dimensional injection recycled process capability warpage shrinkage |
author_facet |
José Eduardo Galve Daniel Elduque Carmelo Pina Isabel Clavería Raquel Acero Ángel Fernández Carlos Javierre |
author_sort |
José Eduardo Galve |
title |
Dimensional Stability and Process Capability of an Industrial Component Injected with Recycled Polypropylene |
title_short |
Dimensional Stability and Process Capability of an Industrial Component Injected with Recycled Polypropylene |
title_full |
Dimensional Stability and Process Capability of an Industrial Component Injected with Recycled Polypropylene |
title_fullStr |
Dimensional Stability and Process Capability of an Industrial Component Injected with Recycled Polypropylene |
title_full_unstemmed |
Dimensional Stability and Process Capability of an Industrial Component Injected with Recycled Polypropylene |
title_sort |
dimensional stability and process capability of an industrial component injected with recycled polypropylene |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2019-06-01 |
description |
The usage of recycled polymers for industrial purposes arises as one of the most promising methods of reducing environmental impact and costs associated with scrapping parts. This paper presents a systematic study of the dimensional stability of a raw and 100% recycled polypropylene subjected to realistic environmental conditions occurring along its working life. The component studied is an internal part of an induction hob assembly. Industrial samples manufactured with both materials, in the same mold, and in the same injection machine, are subjected to ejection conditions, storage conditions (50 °C), and extreme performance conditions (80 °C). Induced dimensional changes are registered and analyzed using a coordinate measuring machine, and a tactile sensing probe. To verify the process capability of the samples manufacturing, <i>C</i><sub>p</sub> and <i>C</i><sub>pk</sub> values are calculated to evaluate the suitability of the recycled material as an alternative. Results conclude that, although the use of recycled material implies slight differences in terms of dimensional stability due to the changes induced in the polymer structure, these differences are not significant enough to affect the injection process capability. Therefore, recycling arises as one effective method to reduce both overruns associated with the consumption of raw polypropylene material and its environmental impact. |
topic |
polypropylene dimensional injection recycled process capability warpage shrinkage |
url |
https://www.mdpi.com/2073-4360/11/6/1063 |
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