Design of a thermoforming process for a semi-crystalline polymer

The use of thermoformed plastic products continues to escalate each year causing vast productions of these plastic manufactured merchandises. A low-cost in design and tooling for the production of thermoformed products compared to injection and blow moulded products has become a major factor in whic...

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Main Author:	Farah Amira, Mohd Ghazali
Format:	Thesis
Language:	English English English
Published:	2017
Subjects:	TS Manufactures
Online Access:	http://umpir.ump.edu.my/id/eprint/23414/ http://umpir.ump.edu.my/id/eprint/23414/ http://umpir.ump.edu.my/id/eprint/23414/1/Design%20of%20a%20thermoforming%20process%20for%20a%20semi-crystalline%20polymer%20-%20Table%20of%20contents.pdf http://umpir.ump.edu.my/id/eprint/23414/2/Design%20of%20a%20thermoforming%20process%20for%20a%20semi-crystalline%20polymer%20-%20Abstract.pdf http://umpir.ump.edu.my/id/eprint/23414/3/Design%20of%20a%20thermoforming%20process%20for%20a%20semi-crystalline%20polymer%20-%20References.pdf

id	ump-23414
recordtype	eprints
spelling	ump-234142018-12-31T08:32:07Z http://umpir.ump.edu.my/id/eprint/23414/ Design of a thermoforming process for a semi-crystalline polymer Farah Amira, Mohd Ghazali TS Manufactures The use of thermoformed plastic products continues to escalate each year causing vast productions of these plastic manufactured merchandises. A low-cost in design and tooling for the production of thermoformed products compared to injection and blow moulded products has become a major factor in which the former is preferred over the latter; in cases of manufacturing simple to complex shapes of plastic products. As plastic productions continue to grow, issues in defects of these parts begin to spread whereby causing low quality thermoformed plastic products to be manufactured. The issues of the defects include incomplete forming and non-uniform wall-thickness distribution of the thermoplastic product which leads to the decreasing the high quality of the thermoformed plastic product. The objective of this research is to design and develop a thermoforming process for the production of a thermoformed plastic part using a positive mould whereby implementing drape forming technique and venting features. A semi-crystalline polymer material, Polypropylene (PP) is heat-softened and drawn onto a positive mould with the assistance of a constant pressure of 20 kPa. Experimental investigations and visualisation observations were carried out in the understanding material behaviour of the polymer material when treated to elevated temperature during the heating of the plastic sheet prior to forming. ANSYS ® Polyflow simulation software was used to compute the modelling of the thermoforming process simulation. The total amount of time of the simulation is 2.6 seconds. Post-thermoforming, the thickness of the thermoforming plastic sheet in the regions in which the venting systems are allocated (region AB and DE) only decreased 22.5% and 37.5% respectively. In regions AB and DE, air is removed through the venting system allowing the plastic sheet to conform onto the mould. The material distribution on these regions are better distributed compared to without using venting system. 2017-08 Thesis NonPeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/23414/1/Design%20of%20a%20thermoforming%20process%20for%20a%20semi-crystalline%20polymer%20-%20Table%20of%20contents.pdf pdf en http://umpir.ump.edu.my/id/eprint/23414/2/Design%20of%20a%20thermoforming%20process%20for%20a%20semi-crystalline%20polymer%20-%20Abstract.pdf pdf en http://umpir.ump.edu.my/id/eprint/23414/3/Design%20of%20a%20thermoforming%20process%20for%20a%20semi-crystalline%20polymer%20-%20References.pdf Farah Amira, Mohd Ghazali (2017) Design of a thermoforming process for a semi-crystalline polymer. Masters thesis, Universiti Malaysia Pahang. http://iportal.ump.edu.my/lib/item?id=chamo:102975&theme=UMP2
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English English English
topic	TS Manufactures
spellingShingle	TS Manufactures Farah Amira, Mohd Ghazali Design of a thermoforming process for a semi-crystalline polymer
description	The use of thermoformed plastic products continues to escalate each year causing vast productions of these plastic manufactured merchandises. A low-cost in design and tooling for the production of thermoformed products compared to injection and blow moulded products has become a major factor in which the former is preferred over the latter; in cases of manufacturing simple to complex shapes of plastic products. As plastic productions continue to grow, issues in defects of these parts begin to spread whereby causing low quality thermoformed plastic products to be manufactured. The issues of the defects include incomplete forming and non-uniform wall-thickness distribution of the thermoplastic product which leads to the decreasing the high quality of the thermoformed plastic product. The objective of this research is to design and develop a thermoforming process for the production of a thermoformed plastic part using a positive mould whereby implementing drape forming technique and venting features. A semi-crystalline polymer material, Polypropylene (PP) is heat-softened and drawn onto a positive mould with the assistance of a constant pressure of 20 kPa. Experimental investigations and visualisation observations were carried out in the understanding material behaviour of the polymer material when treated to elevated temperature during the heating of the plastic sheet prior to forming. ANSYS ® Polyflow simulation software was used to compute the modelling of the thermoforming process simulation. The total amount of time of the simulation is 2.6 seconds. Post-thermoforming, the thickness of the thermoforming plastic sheet in the regions in which the venting systems are allocated (region AB and DE) only decreased 22.5% and 37.5% respectively. In regions AB and DE, air is removed through the venting system allowing the plastic sheet to conform onto the mould. The material distribution on these regions are better distributed compared to without using venting system.
format	Thesis
author	Farah Amira, Mohd Ghazali
author_facet	Farah Amira, Mohd Ghazali
author_sort	Farah Amira, Mohd Ghazali
title	Design of a thermoforming process for a semi-crystalline polymer
title_short	Design of a thermoforming process for a semi-crystalline polymer
title_full	Design of a thermoforming process for a semi-crystalline polymer
title_fullStr	Design of a thermoforming process for a semi-crystalline polymer
title_full_unstemmed	Design of a thermoforming process for a semi-crystalline polymer
title_sort	design of a thermoforming process for a semi-crystalline polymer
publishDate	2017
url	http://umpir.ump.edu.my/id/eprint/23414/ http://umpir.ump.edu.my/id/eprint/23414/ http://umpir.ump.edu.my/id/eprint/23414/1/Design%20of%20a%20thermoforming%20process%20for%20a%20semi-crystalline%20polymer%20-%20Table%20of%20contents.pdf http://umpir.ump.edu.my/id/eprint/23414/2/Design%20of%20a%20thermoforming%20process%20for%20a%20semi-crystalline%20polymer%20-%20Abstract.pdf http://umpir.ump.edu.my/id/eprint/23414/3/Design%20of%20a%20thermoforming%20process%20for%20a%20semi-crystalline%20polymer%20-%20References.pdf
first_indexed	2023-09-18T22:35:02Z
last_indexed	2023-09-18T22:35:02Z
_version_	1777416538434830336

Design of a thermoforming process for a semi-crystalline polymer

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