Characterization of near-zero pressure powder injection moulding with sacrificial mould by using fingerprint geometries

Zhang, Yang; Basso, Alberto; Christensen, Simon Emil; Pedersen, David Bue; Staal, Lasse Guldborg; Valler, Peter; Hansen, Hans Nørgaard

doi:10.1016/j.cirp.2020.04.052

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…Geometrical PFs address the geometrical variation of selected micro/nano features based on process conditions, allowing process learning. Those features can be selected directly from the specimen design [22], or they can be inserted on a nonfunctional part of the product, like the runners in an IM device [23,24]. The PF can also be selected from micro-defects, which do not alter the overall sample functionality, but they can serve for quality assurance [25].…”

Section: Product Fingerprint Methodsmentioning

confidence: 99%

Product Fingerprints for the Evaluation of Tool/Polymer Replication Quality in Injection Molding at the Micro/Nano Scale

Loaldi

Regi

et al. 2021

Nanomanuf Metrol

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Section: Product Fingerprint Methodsmentioning

confidence: 99%

Product Fingerprints for the Evaluation of Tool/Polymer Replication Quality in Injection Molding at the Micro/Nano Scale

Loaldi

Regi

et al. 2021

Nanomanuf Metrol

Self Cite

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“…In Figure 1 , a process chain for PIM is illustrated. A detailed description of this process chain can be found in the authors’ previous works [ 16 ]. In this study, the tools used for the injection moulding machine were fabricated using VPAM.…”

Section: Methodsmentioning

confidence: 99%

“…The advantage of freeform injection moulding is its ability to produce complex geometries like a helix structure; however, there is a lack of knowledge for powder injection moulding with such complex structures, since they are not possible to produce with conventional injection moulding. One of the challenges of using a sacrificial mould, or a soft tool in general, is that the strength of this material is lower than that of traditional tool steel [ 16 ], which hinders the possibility to use injection pressures from 60 to 200 MPa that are typically applied in conventional powder injection moulding.…”

Section: Introductionmentioning

confidence: 99%

Analysing Powder Injection Moulding of a Helix Geometry Using Soft Tooling

et al. 2021

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Freeform injection moulding is a novel technology for powder injection moulding where a sacrificial 3D printed mould (i.e., a soft tooling) is used as an insert in the injection process. The use of 3D printed moulds enable a higher geometrical design flexibility as compared to the conventional injection moulding process. However, there is still very limited knowledge on how the sacrificial soft tooling material and powder suspension handles the increased geometrical complexity during the process. In this study, a stainless steel powder suspension is injected into a geometrically challenging sacrificial mould (viz. a helix structure) that is produced by vat photopolymerization additive manufacturing. Computed tomography is used to quantify the geometrical precision of the mould both before and after injection. In addition, a new numerical model that considers the suspension feedstock is developed to investigate the powder injection moulding process. The numerical results are found to be in qualitative good agreement with the experimental findings in terms of pinpointing critical areas of the structure, thereby highlighting a new pathway for evaluating sacrificial inserts for powder injection moulding with a high geometrical complexity.

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Mold filling simulation and experimental investigation of metallic feedstock used in low-pressure powder injection molding

2021

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Characterization of near-zero pressure powder injection moulding with sacrificial mould by using fingerprint geometries

Cited by 4 publications

References 15 publications

Product Fingerprints for the Evaluation of Tool/Polymer Replication Quality in Injection Molding at the Micro/Nano Scale

Product Fingerprints for the Evaluation of Tool/Polymer Replication Quality in Injection Molding at the Micro/Nano Scale

Analysing Powder Injection Moulding of a Helix Geometry Using Soft Tooling

Mold filling simulation and experimental investigation of metallic feedstock used in low-pressure powder injection molding

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