Additive Manufactoring - Contributi utente [it]

Equipment for additive manufacturing of biocompatible silicone

2020-02-03T11:56:29Z

SaraCampanini:

'''AUTHORS AND FULL AFFILIATIONS:'''

Alessandro Colpani, Antonio Fiorentino, Elisabetta Ceretti

'''KEYWORDS:'''

Extrusion, 3D printing, Medical devices, Biomedical Silicones

'''PURPOSE:'''

This work focuses on the development of an extrusion based 3D printing process equipment for two-component and biocompatible silicones. The main problem when processing these silicones is the curing time that brings to the full solidification of the polymer. In fact, this material is characterized by a too short curing time (tens of minutes) when compared with the processing time of AM (hours or even days). Therefore the purpose of this work is to present a new technology which can overcome this limitation. The technology is a new extrusion head Abe to extend the processing time of the material.

'''LIMITATION:'''

The main problem when processing these silicones is the curing time that brings to the full solidification of the polymer. In fact, this material is characterized by a too short curing time (tens of minutes) when compared with the processing time of AM (hours or even days).

'''FINDINGS:'''
dimensioning, design and realization phases of a modular extrusion head are presented. The extrusion head is equipped with a cooling system able to keep the silicone at low temperature in order to slow down the curing kinetics. Furthermore, the results of the testing phase performed to evaluate the behavior and the optimal operating conditions of this equipment are provided.

'''ORIGINALITY/VALUE:'''
This work demonstrates the effectiveness of the proposed solution in reaching suitable temperatures to extend the time window of AM process for biocompatible silicones. The developed equipment overcomes the main issues related to the biomedical silicones processing with AM, and shows a potential application in customized medical devices production.

'''FULL REFERENCE:'''

COLPANI, Alessandro; FIORENTINO, Antonio; CERETTI, Elisabetta. Equipment for additive manufacturing of biocompatible silicone. In: AIP Conference Proceedings. AIP Publishing, 2019. p. 150003.

'''LINK:'''

https://aip.scitation.org/doi/abs/10.1063/1.5112679

[[Utente:SaraCampanini|SaraCampanini]]

3D printing technique applied to rapid casting

2020-02-03T11:55:48Z

SaraCampanini:

'''PURPOSE'''

The purpose of this paper is to verify the feasibility and evaluate the dimensional accuracy of two rapid casting (RC) solutions based on 3D printing technology: investment casting starting from 3D‐printed starch patterns and the ZCast process for the production of cavities for light‐alloys castings.

'''AUTHORS AND FULL AFFILIATIONS:'''

Elena Bassoli, Andrea Gatto, Luca Iuliano, Maria Grazia Violante

'''KEYWORDS'''

Rapid Prototypes, Printers, Computer Aided Design

'''METHODOLOGY'''

Starting from the identification and design of a benchmark, technological prototypes were produced with the two RC processes. Measurements on a coordinate measuring machine allowed calculating the dimensional tolerances of the proposed technological chains. The predictive performances of computer aided engineering (CAE) software were verified when applied to the ZCast process modelling.

'''FINDINGS'''

The research proved that both the investigated RC solutions are effective in obtaining cast technological prototypes in short times and with low costs, with dimensional tolerances that are completely consistent with metal casting processes.

'''PRACTICAL IMPLICATIONS'''

The research assessed the feasibility and dimensional performances of two RC solutions, providing data that are extremely useful for the industrial application of the considered technologies.

'''ORIGINALITY/VALUE'''

The paper deals with experimental work on innovative techniques on which data are still lacking in literature. In particular, an original contribution to the determination of dimensional tolerances and the investigation on the predictive performances of commercial CAE software is provided.

'''FULL REFERENCES'''

BASSOLI, Elena, et al. 3D printing technique applied to rapid casting. Rapid Prototyping Journal, 2007, 13.3: 148-155.

'''LINK'''
https://www.emerald.com/insight/content/doi/10.1108/13552540710750898/full/html

[[Utente:SaraCampanini|SaraCampanini]]

Utente:SaraCampanini

2020-02-03T11:55:11Z

SaraCampanini: Creata pagina con "Sara Campanini"

Sara Campanini

Thickening of surfaces for direct additive manufacturing fabrication

2020-02-03T11:54:49Z

SaraCampanini:

'''PURPOSE'''

The purpose of this paper is to propose a new way of prototyping surfaces, taking the mathematical background into account, without involving drawing environments.

'''KEYWORDS'''

Prototypes, Manufacturing systems, Mathematics, Surface properties of materials, Additive manufacturing, Surface thickening, Fused deposition modelling

'''AUTHORS AND FULL AFFILIATION'''

Manlio Bordoni, Alberto Boschetto

'''METHODOLOGY'''

The authors thicken surfaces from a mathematical point of view to obtain solids. Next they look for an operative procedure to build virtual models and interchange files. The authors build a sample of Enneper thickened surface by fused deposition modelling and verify the prototype by reverse engineering techniques.

'''FINDINGS'''

The authors provide a formulation able to thicken surfaces in mathematical terms. An operative procedure generates virtual solids and interchange files in the same environment. The approximations necessary for additive fabrication, such as triangulations and mesh geometry, can be chosen at this stage.

'''LIMITATION'''

The approach is useful at the product/process development stage, in which surfaces are delivered by theoretical analysis. At this stage a prototype can give useful advice permitting functional tests. The limitation is that, when the mathematical formulation is not available, it is difficult to translate a concept without fundamentals of differential geometry.

'''PRACTICAL IMPLICATIONS'''

Approximations of drawing environments typically lead to fault models, not ready for fabrication by additive manufacturing (AM) technologies, needing empiric, not at all obvious and not rapid repair interventions. The authors' approach eliminates this stage, permitting a faster and simple managing of modifications due to functional and technological requirements, that are frequent at concept stage. This leads to a time‐to‐market reduction in the course of product/process development.

'''ORIGINALITY/VALUE'''

This paper extends the capability of a mathematical approach to solve surface prototyping problems. By reducing the required stages, the proposed methodology finds a theoretical and practical shorter route to direct fabrication.

'''FULL REFERENCES'''

BORDONI, Manlio; BOSCHETTO, Alberto. Thickening of surfaces for direct additive manufacturing fabrication. Rapid Prototyping Journal, 2012.

'''LINK'''

https://www.emerald.com/insight/content/doi/10.1108/13552541211231734/full/html

[[Utente:SaraCampanini|SaraCampanini]]

Thickening of surfaces for direct additive manufacturing fabrication

2020-02-03T11:52:37Z

SaraCampanini:

3D printing technique applied to rapid casting

2020-02-03T11:50:58Z

SaraCampanini:

3D printing technique applied to rapid casting

2020-02-03T11:50:22Z

SaraCampanini: Creata pagina con "'''PURPOSE''' The purpose of this paper is to verify the feasibility and evaluate the dimensional accuracy of two rapid casting (RC) solutions based on 3D printing technology..."

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2020-02-03T11:47:11Z

SaraCampanini: /* Trasversal issues */

[[Utente:BaldassareVitaggio|BaldassarreVitaggio]]
[https://docs.google.com/document/d/1Dpv8YCcSNuxh99Nw9ARPFtaRnw1ZEKm8RlWba0UMcWU/edit Istruzioni (in Italian, sorry)]

=[[Materials]]=

=[[Processes]]=
*[[Fused Deposition Modeling]]
*[[Wire Arc Additive Manifacturing]]
*[[Material Jetting]]
*[[Vat Polymerization]]
*[[Selective Laser Melting]]
*[[Hybrid Additive Manufacturing]]
*[[Laser engineered net shaping]]
*[[Droplet-Based Manufacturing]]
*[[Laser Processing]]
*[[Augmented reality 3D for manual assemply workstation]]
*[[Direct energy deposition]]
*[[Extrusion based 3D printing process]]

=[[Parts]]=
*[[Selective Laser Melting Parts]]
*[[Medical devices]]

=[[Trasversal issues ]]=
*[[3D printing benefits on supply chain]]
*[[Contactless inspection]]
*[[Thickening of surfaces for direct additive manufacturing fabrication]]
*[[3D printing technique applied to rapid casting]]
[[Speciale:Utenti|Users]]

Main Page

2020-02-03T11:46:20Z

SaraCampanini: /* Trasversal issues */

Main Page

2020-02-03T11:45:27Z

SaraCampanini: /* Trasversal issues */

[[Utente:BaldassareVitaggio|BaldassarreVitaggio]]
[https://docs.google.com/document/d/1Dpv8YCcSNuxh99Nw9ARPFtaRnw1ZEKm8RlWba0UMcWU/edit Istruzioni (in Italian, sorry)]

=[[Materials]]=

=[[Processes]]=
*[[Fused Deposition Modeling]]
*[[Wire Arc Additive Manifacturing]]
*[[Material Jetting]]
*[[Vat Polymerization]]
*[[Selective Laser Melting]]
*[[Hybrid Additive Manufacturing]]
*[[Laser engineered net shaping]]
*[[Droplet-Based Manufacturing]]
*[[Laser Processing]]
*[[Augmented reality 3D for manual assemply workstation]]
*[[Direct energy deposition]]
*[[Extrusion based 3D printing process]]

=[[Parts]]=
*[[Selective Laser Melting Parts]]
*[[Medical devices]]

=[[Trasversal issues ]]=
*[[3D printing benefits on supply chain]]
*[[Contactless inspection]]
*[[3D printing technique applied to rapid casting]]
[[Speciale:Utenti|Users]]

Thickening of surfaces for direct additive manufacturing fabrication

2020-02-03T11:41:33Z

SaraCampanini:

'''PURPOSE'''

The purpose of this paper is to propose a new way of prototyping surfaces, taking the mathematical background into account, without involving drawing environments.

'''KEYWORDS'''

Prototypes, Manufacturing systems, Mathematics, Surface properties of materials, Additive manufacturing, Surface thickening, Fused deposition modelling

'''METHODOLOGY'''

The authors thicken surfaces from a mathematical point of view to obtain solids. Next they look for an operative procedure to build virtual models and interchange files. The authors build a sample of Enneper thickened surface by fused deposition modelling and verify the prototype by reverse engineering techniques.

'''FINDINGS'''

The authors provide a formulation able to thicken surfaces in mathematical terms. An operative procedure generates virtual solids and interchange files in the same environment. The approximations necessary for additive fabrication, such as triangulations and mesh geometry, can be chosen at this stage.

'''LIMITATION'''

The approach is useful at the product/process development stage, in which surfaces are delivered by theoretical analysis. At this stage a prototype can give useful advice permitting functional tests. The limitation is that, when the mathematical formulation is not available, it is difficult to translate a concept without fundamentals of differential geometry.

'''PRACTICAL IMPLICATIONS'''

Approximations of drawing environments typically lead to fault models, not ready for fabrication by additive manufacturing (AM) technologies, needing empiric, not at all obvious and not rapid repair interventions. The authors' approach eliminates this stage, permitting a faster and simple managing of modifications due to functional and technological requirements, that are frequent at concept stage. This leads to a time‐to‐market reduction in the course of product/process development.

'''ORIGINALITY/VALUE'''

This paper extends the capability of a mathematical approach to solve surface prototyping problems. By reducing the required stages, the proposed methodology finds a theoretical and practical shorter route to direct fabrication.

'''FULL REFERENCES'''

BORDONI, Manlio; BOSCHETTO, Alberto. Thickening of surfaces for direct additive manufacturing fabrication. Rapid Prototyping Journal, 2012.

'''LINK'''

https://www.emerald.com/insight/content/doi/10.1108/13552541211231734/full/html

Thickening of surfaces for direct additive manufacturing fabrication

2020-02-03T11:41:17Z

SaraCampanini: Creata pagina con "'''PURPOSE''' The purpose of this paper is to propose a new way of prototyping surfaces, taking the mathematical background into account, without involving drawing environmen..."

'''PURPOSE'''

The purpose of this paper is to propose a new way of prototyping surfaces, taking the mathematical background into account, without involving drawing environments.

'''KEYWORDS'''

Prototypes, Manufacturing systems, Mathematics, Surface properties of materials, Additive manufacturing, Surface thickening, Fused deposition modelling

'''METHODOLOGY'''

The authors thicken surfaces from a mathematical point of view to obtain solids. Next they look for an operative procedure to build virtual models and interchange files. The authors build a sample of Enneper thickened surface by fused deposition modelling and verify the prototype by reverse engineering techniques.

'''FINDINGS'''

The authors provide a formulation able to thicken surfaces in mathematical terms. An operative procedure generates virtual solids and interchange files in the same environment. The approximations necessary for additive fabrication, such as triangulations and mesh geometry, can be chosen at this stage.

'''LIMITATION'''

The approach is useful at the product/process development stage, in which surfaces are delivered by theoretical analysis. At this stage a prototype can give useful advice permitting functional tests. The limitation is that, when the mathematical formulation is not available, it is difficult to translate a concept without fundamentals of differential geometry.

'''PRACTICAL IMPLICATIONS'''

Approximations of drawing environments typically lead to fault models, not ready for fabrication by additive manufacturing (AM) technologies, needing empiric, not at all obvious and not rapid repair interventions. The authors' approach eliminates this stage, permitting a faster and simple managing of modifications due to functional and technological requirements, that are frequent at concept stage. This leads to a time‐to‐market reduction in the course of product/process development.

'''ORIGINALITY/VALUE'''

This paper extends the capability of a mathematical approach to solve surface prototyping problems. By reducing the required stages, the proposed methodology finds a theoretical and practical shorter route to direct fabrication.

'''FULL REFERENCES'''

BORDONI, Manlio; BOSCHETTO, Alberto. Thickening of surfaces for direct additive manufacturing fabrication. Rapid Prototyping Journal, 2012.

'''LINK'''

https://www.emerald.com/insight/content/doi/10.1108/13552541211231734/full/html

Main Page

2020-02-03T11:37:30Z

SaraCampanini: /* Trasversal issues */

[https://docs.google.com/document/d/1Dpv8YCcSNuxh99Nw9ARPFtaRnw1ZEKm8RlWba0UMcWU/edit Istruzioni (in Italian, sorry)]

=[[Materials]]=

=[[Processes]]=
*[[Fused Deposition Modeling]]
*[[Wire Arc Additive Manifacturing]]
*[[Material Jetting]]
*[[Vat Polymerization]]
*[[Selective Laser Melting]]
*[[Hybrid Additive Manufacturing]]
*[[Laser engineered net shaping]]
*[[Droplet-Based Manufacturing]]
*[[Laser Processing]]
*[[Augmented reality 3D for manual assemply workstation]]
*[[Direct energy deposition]]
*[[Extrusion based 3D printing process]]

=[[Parts]]=
*[[Selective Laser Melting Parts]]
*[[Medical devices]]

=[[Trasversal issues ]]=
*[[3D printing benefits on supply chain]]
*[[Contactless inspection]]
*[[Thickening of surfaces for direct additive manufacturing fabrication]]

[[Speciale:Utenti|Users]]

Equipment for additive manufacturing of biocompatible silicone

2020-02-03T11:34:20Z

SaraCampanini: Creata pagina con "'''AUTHORS AND FULL AFFILIATIONS:''' Alessandro Colpani, Antonio Fiorentino, Elisabetta Ceretti '''KEYWORDS:''' Extrusion, 3D printing, Medical devices, Biomedical Silicon..."

Extrusion based 3D printing process

2020-02-03T11:31:52Z

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*[[Equipment for additive manufacturing of biocompatible silicone]]

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2020-02-03T11:31:28Z

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