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Authors = Fábio A. Gameiro ORCID = 0000-0001-5562-2809

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22 pages, 15002 KiB  
Article
Time and Spatially Resolved Operando Small-Angle X-ray Scattering Measurements during Injection Moulding of Plastics
by Matteo Arioli, Anabela Paiva Massano, Daniel P. da Silva, Fábio A. Gameiro, Pedro Carreira, Marc Malfois, João Matias, Paula Pascoal-Faria, Artur Mateus and Geoffrey R. Mitchell
J. Manuf. Mater. Process. 2023, 7(5), 176; https://doi.org/10.3390/jmmp7050176 - 29 Sep 2023
Cited by 3 | Viewed by 3698
Abstract
We recently introduced the possibility of performing operando small-angle X-ray scattering measurements using a novel industrially relevant injection moulding system for plastics. We show that useful time-resolving measurements can be performed with a time-cycle of 1 s and highlight the possible steps to [...] Read more.
We recently introduced the possibility of performing operando small-angle X-ray scattering measurements using a novel industrially relevant injection moulding system for plastics. We show that useful time-resolving measurements can be performed with a time-cycle of 1 s and highlight the possible steps to reduce this to 0.5 s. We show how we can use the transmission measurements to provide a time marker when plastic first enters the mould cavity in the region probed by the incident X-ray beam. We show the opportunities provided by this experimental stage mounted on the NCD-SWEET beamline at ALBA to probe the reproducibility of the injection moulding system on different scales. The design of the equipment allowed for the development of the structure and the morphology to be evaluated in different parts of mould cavity, and we evaluated any differences in a rectangular mould cavity. We identified future prospects for this equipment in terms of novel mould heating and cooling systems and the opportunities for quantitatively evaluating radical approaches to injection moulding technology. Full article
(This article belongs to the Special Issue Advances in Injection Molding: Process, Materials and Applications)
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13 pages, 2870 KiB  
Article
Evaluating the Injection Moulding of Plastic Parts Using In Situ Time-Resolved Small-Angle X-ray Scattering Techniques
by André A. Costa, Fábio Gameiro, Artur Potêncio, Daniel P. da Silva, Pedro Carreira, Juan Carlos Martinez, Paula Pascoal-Faria, Artur Mateus and Geoffrey R. Mitchell
Polymers 2022, 14(21), 4745; https://doi.org/10.3390/polym14214745 - 5 Nov 2022
Cited by 6 | Viewed by 3384
Abstract
In this study, we describe the design and fabrication of an industrial injection moulding system that can be mounted and used on the NCD-SWEET small-angle X-ray scattering beamline at ALBA. We show how highly useful time-resolved data can be obtained using this system. [...] Read more.
In this study, we describe the design and fabrication of an industrial injection moulding system that can be mounted and used on the NCD-SWEET small-angle X-ray scattering beamline at ALBA. We show how highly useful time-resolved data can be obtained using this system. We are able to evaluate the fraction of the material in the mould cavity and identify the first material to solidify and how this varies with the injection temperature. The design follows current industrial practice and provides opportunities to collect time-resolved data at several points within the mould cavity so that we can build up a 4D perspective of the morphology and its temporal development. The quantitative data obtained will prove invaluable for the optimisation of the next generation of injection moulding techniques. This preliminary work used results from the injection moulding of a general-purpose isotactic polypropylene. Full article
(This article belongs to the Special Issue Advances on Injection Molding of Polymers II)
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