Advances in Near Net Shape Polymer Manufacturing Through Microcellular Injection Moulding

Llewelyn, Gethin; Rees, Andrew; Griffiths, Christian; Scholz, Steffen

doi:10.1007/978-3-030-10579-2_8

Cited by 2 publications

(1 citation statement)

References 34 publications

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“…Process schematic to illustrate the additional modifications required of a conventional IM machine to facilitate MIM processing (adapted with permission from Springer Nature). 30 advancements in the technology have shown that by incorporating packing time in MIM (high-pressure foaming), the final cell morphology can be improved as the residual, larger cells that nucleate during the filling stage, are dissolved into the melt and then nucleate in a more controlled manner during cooling. [33][34][35]…”

Section: Mim Processmentioning

confidence: 99%

Advances in microcellular injection moulding

Llewelyn

Rees

Griffiths

et al. 2020

Journal of Cellular Plastics

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Injection moulding is a well-established replication process for the cost-effective manufacture of polymer-based components. The process has different applications in fields such as medical, automotive and aerospace. To expand the use of polymers to meet growing consumer demands for increased functionality, advanced injection moulding processes have been developed that modifies the polymer to create microcellular structures. Through the creation of microcellular materials, additional functionality can be gained through polymer component weight and processing energy reduction. Microcellular injection moulding shows high potential in creating innovation green manufacturing platforms. This review article aims to present the significant developments that have been achieved in different aspects of microcellular injection moulding. Aspects covered include core-back, gas counter pressure, variable thermal tool moulding and other advanced technologies. The resulting characteristics of creating microcellular injection moulding components through both plasticising agents and nucleating agents are presented. In addition, the article highlights potential areas for research exploitation. In particular, acoustic and thermal applications, nano-cellular injection moulding parts and developments of more accurate simulations.

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Section: Mim Processmentioning

confidence: 99%

Advances in microcellular injection moulding

Llewelyn

Rees

Griffiths

et al. 2020

Journal of Cellular Plastics

View full text Add to dashboard Cite

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A Design of Experiment Approach for Surface Roughness Comparisons of Foam Injection-Moulding Methods

et al. 2020

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The pursuit of polymer parts produced through foam injection moulding (FIM) that have a comparable surface roughness to conventionally processed components are of major relevance to expand the application of FIM. Within this study, 22% talc-filled copolymer polypropylene (PP) parts were produced through FIM using both a physical and chemical blowing agent. A design of experiments (DoE) was performed whereby the processing parameters of mould temperatures, injection speeds, back-pressure, melt temperature and holding time were varied to determine their effect on surface roughness, Young’s modulus and tensile strength. The results showed that mechanical performance can be improved when processing with higher mould temperatures and longer holding times. Also, it was observed that when utilising chemical foaming agents (CBA) at low-pressure, surface roughness comparable to that obtained from conventionally processed components can be achieved. This research demonstrates the potential of FIM to expand to applications whereby weight saving can be achieved without introducing surface defects, which has previously been witnessed within FIM.

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Advances in Near Net Shape Polymer Manufacturing Through Microcellular Injection Moulding

Cited by 2 publications

References 34 publications

Advances in microcellular injection moulding

Advances in microcellular injection moulding

A Design of Experiment Approach for Surface Roughness Comparisons of Foam Injection-Moulding Methods

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