A comparison of processing techniques for producing prototype injection moulding inserts.

Ewart, Paul (2019) A comparison of processing techniques for producing prototype injection moulding inserts. The New Zealand Manufacturing and Design (MaD) Conference , Cordis Auckland, New Zealand, 20-21 May, 2019.

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Official URL: https://www.madenz.org/

Abstract or Summary

This project involves the investigation of processing techniques for producing low-cost moulding inserts used in the particulate injection moulding (PIM) process. Prototype moulds were made from both additive and subtractive processes as well as a combination of the two. The general motivation for this was to reduce the entry cost of users when considering PIM. PIM cavity inserts were first made by conventional machining from a polymer block using the pocket NC desktop mill. PIM cavity inserts were also made by fused filament deposition modelling using the Tiertime UP plus 3D printer. The injection moulding trials manifested in surface finish and part removal defects. The feedstock was a titanium metal blend which is brittle in comparison to commodity polymers. That in combination with the mesoscale features, small cross-sections and complex geometries were considered the main problems. For both processing methods, fixes were identified and made to test the theory. These consisted of a blended approach that saw a combination of both the additive and subtractive processes being used. The parts produced from the three processing methods are investigated and their respective merits and issues are discussed.

Item Type:Item presented at a conference, workshop or other event, and published in the proceedings
Keywords that describe the item:PIM, injection moulding, additive, machining
Subjects:T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
T Technology > TN Mining engineering. Metallurgy
T Technology > TS Manufactures
Divisions:Schools > Centre for Engineering and Industrial Design
ID Code:7270
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Deposited On:04 May 2020 03:37
Last Modified:04 May 2020 03:37

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