Effect of employing different grades of recycled polyamide 12 on the surface texture of laser sintered (LS) parts

Laser sintering (LS) is one of the most versatile rapid prototyping (RP) processes currently available. One of the main advantages of employing this technology is that the non-sintered powder can be recycled and reused for further fabrication. Current powder recycling methodologies using a constant...

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Main Authors:	Wan Yusoff, Wan Ahmad Yusmawiza, Pham, D. T., Dotchev, K.
Format:	Conference or Workshop Item
Language:	English
Published:	2009
Subjects:	T59.7 Human engineering in industry. Man-machine systems TA170 Environmental engineering
Online Access:	http://irep.iium.edu.my/5956/ http://irep.iium.edu.my/5956/1/Paper_ID797PA12.pdf

id	iium-5956
recordtype	eprints
spelling	iium-59562013-01-10T23:23:40Z http://irep.iium.edu.my/5956/ Effect of employing different grades of recycled polyamide 12 on the surface texture of laser sintered (LS) parts Wan Yusoff, Wan Ahmad Yusmawiza Pham, D. T. Dotchev, K. T59.7 Human engineering in industry. Man-machine systems TA170 Environmental engineering Laser sintering (LS) is one of the most versatile rapid prototyping (RP) processes currently available. One of the main advantages of employing this technology is that the non-sintered powder can be recycled and reused for further fabrication. Current powder recycling methodologies using a constant refresh rate with a very high portion of new material being added to the existing material reserve in order to maintain part quality and integrity. If the amount of the new powder is insufficient or if the recycled material is too “old” (i.e. has been recycled too many times), then the fabricated parts experience variation in their quality. Typical quality defects include; higher shrinkage rates and rougher than average surface textures often known as “orange peel”. This paper reports on an experimental study to investigate the significance of different deteriorated recycle Polyamide 12 (PA12) powders on the surface quality of products. The main aim of this research is to determine and acceptable ratio quantities of virgin to recycled powder that can be used before adversely affecting product surface texture. In this experiment, the melt flow rate (MFR) is chosen as a criterion to measure the recycled powder quality. The microstructures of external surface and cross sectional parts which employed the different grades of recycled powder quality were examined. The results of experiment suggested that the refresh powder target must be at least 27MFR in order to produce a LS good part surface. 2009 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/5956/1/Paper_ID797PA12.pdf Wan Yusoff, Wan Ahmad Yusmawiza and Pham, D. T. and Dotchev, K. (2009) Effect of employing different grades of recycled polyamide 12 on the surface texture of laser sintered (LS) parts. In: International Conference on Advances in Materials & Processing Technology (AMPT 2009), 26-29 Oct., 2009, Kuala Lumpur.
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	T59.7 Human engineering in industry. Man-machine systems TA170 Environmental engineering
spellingShingle	T59.7 Human engineering in industry. Man-machine systems TA170 Environmental engineering Wan Yusoff, Wan Ahmad Yusmawiza Pham, D. T. Dotchev, K. Effect of employing different grades of recycled polyamide 12 on the surface texture of laser sintered (LS) parts
description	Laser sintering (LS) is one of the most versatile rapid prototyping (RP) processes currently available. One of the main advantages of employing this technology is that the non-sintered powder can be recycled and reused for further fabrication. Current powder recycling methodologies using a constant refresh rate with a very high portion of new material being added to the existing material reserve in order to maintain part quality and integrity. If the amount of the new powder is insufficient or if the recycled material is too “old” (i.e. has been recycled too many times), then the fabricated parts experience variation in their quality. Typical quality defects include; higher shrinkage rates and rougher than average surface textures often known as “orange peel”. This paper reports on an experimental study to investigate the significance of different deteriorated recycle Polyamide 12 (PA12) powders on the surface quality of products. The main aim of this research is to determine and acceptable ratio quantities of virgin to recycled powder that can be used before adversely affecting product surface texture. In this experiment, the melt flow rate (MFR) is chosen as a criterion to measure the recycled powder quality. The microstructures of external surface and cross sectional parts which employed the different grades of recycled powder quality were examined. The results of experiment suggested that the refresh powder target must be at least 27MFR in order to produce a LS good part surface.
format	Conference or Workshop Item
author	Wan Yusoff, Wan Ahmad Yusmawiza Pham, D. T. Dotchev, K.
author_facet	Wan Yusoff, Wan Ahmad Yusmawiza Pham, D. T. Dotchev, K.
author_sort	Wan Yusoff, Wan Ahmad Yusmawiza
title	Effect of employing different grades of recycled polyamide 12 on the surface texture of laser sintered (LS) parts
title_short	Effect of employing different grades of recycled polyamide 12 on the surface texture of laser sintered (LS) parts
title_full	Effect of employing different grades of recycled polyamide 12 on the surface texture of laser sintered (LS) parts
title_fullStr	Effect of employing different grades of recycled polyamide 12 on the surface texture of laser sintered (LS) parts
title_full_unstemmed	Effect of employing different grades of recycled polyamide 12 on the surface texture of laser sintered (LS) parts
title_sort	effect of employing different grades of recycled polyamide 12 on the surface texture of laser sintered (ls) parts
publishDate	2009
url	http://irep.iium.edu.my/5956/ http://irep.iium.edu.my/5956/1/Paper_ID797PA12.pdf
first_indexed	2023-09-18T20:14:46Z
last_indexed	2023-09-18T20:14:46Z
_version_	1777407714381529088

Effect of employing different grades of recycled polyamide 12 on the surface texture of laser sintered (LS) parts

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