Accurate characterisation of post moulding shrinkage of polymer parts

L. C. Neves; L. De Chiffre; D. González-Madruga; G. Dalla Costa; I. Jespersen

Accurate characterisation of post moulding shrinkage of polymer parts

L. C. Neves
, L. De Chiffre
, D. González-Madruga
, G. Dalla Costa
, I. Jespersen

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

The work deals with experimental determination of the shrinkage of polymer parts after injection moulding. A fixture for length measurements on 8 parts at the same time was designed and manufactured in Invar, mounted with 8 electronic gauges, and provided with 3 temperature sensors. The fixture was used to record the length at a well-defined position on each part continuously, starting from approximately 10 minutes after moulding and covering a time period of 7 days. Two series of shrinkage curves were analysed and length values after stabilisation extracted and compared for all 16 parts. Values were compensated with respect to the effect from temperature variations during the measurements. Prediction of the length after stabilisation was carried out by fitting data at different stages of shrinkage. Uncertainty estimations were carried out and a procedure for the accurate characterisation of post moulding shrinkage of polymer parts was developed. Expanded uncertainties (k=2) of 3 μm were obtained.

Original language	English
Title of host publication	Proceedings of the 15th International Conference of the European Society for Precision Engineering and Nanotechnology
Publisher	The European Society for Precision Engineering and Nanotechnology
Publication date	2015
Pages	131-132
ISBN (Print)	9780956679079
Publication status	Published - 2015
Event	15th euspen International Conference & Exhibition (2015) - Leuven, Belgium Duration: 1 Jun 2015 → 5 Jun 2015 Conference number: 15 http://www.euspen.eu/OurEvents/Leuven2015.aspx

Conference

Conference	15th euspen International Conference & Exhibition (2015)
Number	15
Country/Territory	Belgium
City	Leuven
Period	01/06/2015 → 05/06/2015
Internet address	http://www.euspen.eu/OurEvents/Leuven2015.aspx

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title = "Accurate characterisation of post moulding shrinkage of polymer parts",

abstract = "The work deals with experimental determination of the shrinkage of polymer parts after injection moulding. A fixture for length measurements on 8 parts at the same time was designed and manufactured in Invar, mounted with 8 electronic gauges, and provided with 3 temperature sensors. The fixture was used to record the length at a well-defined position on each part continuously, starting from approximately 10 minutes after moulding and covering a time period of 7 days. Two series of shrinkage curves were analysed and length values after stabilisation extracted and compared for all 16 parts. Values were compensated with respect to the effect from temperature variations during the measurements. Prediction of the length after stabilisation was carried out by fitting data at different stages of shrinkage. Uncertainty estimations were carried out and a procedure for the accurate characterisation of post moulding shrinkage of polymer parts was developed. Expanded uncertainties (k=2) of 3 μm were obtained.",

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year = "2015",

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pages = "131--132",

booktitle = "Proceedings of the 15th International Conference of the European Society for Precision Engineering and Nanotechnology",

publisher = "The European Society for Precision Engineering and Nanotechnology",

note = "15th euspen International Conference \& Exhibition (2015) ; Conference date: 01-06-2015 Through 05-06-2015",

url = "http://www.euspen.eu/OurEvents/Leuven2015.aspx",

}

Neves, LC, De Chiffre, L, González-Madruga, D, Dalla Costa, G & Jespersen, I 2015, Accurate characterisation of post moulding shrinkage of polymer parts. in Proceedings of the 15th International Conference of the European Society for Precision Engineering and Nanotechnology. The European Society for Precision Engineering and Nanotechnology, pp. 131-132, 15th euspen International Conference & Exhibition (2015), Leuven, Belgium, 01/06/2015.

Accurate characterisation of post moulding shrinkage of polymer parts. / Neves, L. C.; De Chiffre, L.; González-Madruga, D. et al.
Proceedings of the 15th International Conference of the European Society for Precision Engineering and Nanotechnology. The European Society for Precision Engineering and Nanotechnology, 2015. p. 131-132.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

TY - GEN

T1 - Accurate characterisation of post moulding shrinkage of polymer parts

AU - Neves, L. C.

AU - De Chiffre, L.

AU - González-Madruga, D.

AU - Dalla Costa, G.

AU - Jespersen, I.

N1 - Conference code: 15

PY - 2015

Y1 - 2015

N2 - The work deals with experimental determination of the shrinkage of polymer parts after injection moulding. A fixture for length measurements on 8 parts at the same time was designed and manufactured in Invar, mounted with 8 electronic gauges, and provided with 3 temperature sensors. The fixture was used to record the length at a well-defined position on each part continuously, starting from approximately 10 minutes after moulding and covering a time period of 7 days. Two series of shrinkage curves were analysed and length values after stabilisation extracted and compared for all 16 parts. Values were compensated with respect to the effect from temperature variations during the measurements. Prediction of the length after stabilisation was carried out by fitting data at different stages of shrinkage. Uncertainty estimations were carried out and a procedure for the accurate characterisation of post moulding shrinkage of polymer parts was developed. Expanded uncertainties (k=2) of 3 μm were obtained.

AB - The work deals with experimental determination of the shrinkage of polymer parts after injection moulding. A fixture for length measurements on 8 parts at the same time was designed and manufactured in Invar, mounted with 8 electronic gauges, and provided with 3 temperature sensors. The fixture was used to record the length at a well-defined position on each part continuously, starting from approximately 10 minutes after moulding and covering a time period of 7 days. Two series of shrinkage curves were analysed and length values after stabilisation extracted and compared for all 16 parts. Values were compensated with respect to the effect from temperature variations during the measurements. Prediction of the length after stabilisation was carried out by fitting data at different stages of shrinkage. Uncertainty estimations were carried out and a procedure for the accurate characterisation of post moulding shrinkage of polymer parts was developed. Expanded uncertainties (k=2) of 3 μm were obtained.

M3 - Article in proceedings

SN - 9780956679079

SP - 131

EP - 132

BT - Proceedings of the 15th International Conference of the European Society for Precision Engineering and Nanotechnology

PB - The European Society for Precision Engineering and Nanotechnology

T2 - 15th euspen International Conference & Exhibition (2015)

Y2 - 1 June 2015 through 5 June 2015

ER -

Accurate characterisation of post moulding shrinkage of polymer parts

Abstract

Conference

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