Welcome To UTPedia

We would like to introduce you, the new knowledge repository product called UTPedia. The UTP Electronic and Digital Intellectual Asset. It stores digitized version of thesis, dissertation, final year project reports and past year examination questions.

Browse content of UTPedia using Year, Subject, Department and Author and Search for required document using Searching facilities included in UTPedia. UTPedia with full text are accessible for all registered users, whereas only the physical information and metadata can be retrieved by public users. UTPedia collaborating and connecting peoples with university’s intellectual works from anywhere.

Disclaimer - Universiti Teknologi PETRONAS shall not be liable for any loss or damage caused by the usage of any information obtained from this web site.Best viewed using Mozilla Firefox 3 or IE 7 with resolution 1024 x 768.

NOVEL TECHNIQUES FOR REDUCING COOLING TIME IN POLYMER INJECTION MOULDS USING RAPID TOOLING TECHNOLOGIES

ALTAF, KHURRAM (2011) NOVEL TECHNIQUES FOR REDUCING COOLING TIME IN POLYMER INJECTION MOULDS USING RAPID TOOLING TECHNOLOGIES. PhD thesis, UNIVERSITI TEKNOLOGI PETRONAS.

[img]
Preview
PDF
Download (14Mb) | Preview

Abstract

In this research, thermal simulations and injection moulding experiments were performed to compare moulds having cooling channels of circular cross section and those with profiled cross section channels. Studies have been performed on the cooling time reduction in plastic injection moulding by different techniques utilizing thermal simulations and thermal measurements during experiments. Rapid Tooling (RT) technique, which is a manufacturing technique used to produce injection mould tools in a short period of time, has been applied in this research to fabricate injection moulds having circular and profiled conformal cooling channels. Injection moulding experiments for parts was done with these RT moulds using a vertical injection moulding machine. Manufacturing of mould patterns was done using 3-dimensional Printer Rapid Prototyping machine which used wax as the build material. Wax patterns were designed, fabricated and used to fabricate the mould cavity and channels. Aluminum Filled Epoxy material was used for the fabrication of mould cavities having circular conformal cooling channels and profiled conformal cooling channels. As the thermal conductivity of aluminum filled epoxy is much lower than metal moulds, another innovative concept which was embedding a metal insert around the cavity, was also applied for enhancing the heat dissipation. The metal insert was fabricated from aluminum. The concept was tested by fabricating moulds with aluminum inserts. All moulds were tested by injection moulding experiments with embedded thermocouples to measure the temperature of the cavity surface and temperatures were recorded with a data logger. Analysis of the temperature data indicated that the profiled channels had an increased heat dissipation and reduction of cooling time of about 17 percent over the circular channels. With the moulds having aluminum inserts, there was an impressive increase in cooling rate and the cooling time was further reduced by over 50 percent as compared to moulds without inserts.

Item Type: Thesis (PhD)
Subject: UNSPECIFIED
Divisions: UNSPECIFIED
Depositing User: Users 5 not found.
Date Deposited: 05 Jun 2012 10:32
Last Modified: 25 Jan 2017 09:42
URI: http://utpedia.utp.edu.my/id/eprint/3033

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...