Fused deposition modelling based rapid patterns for investment casting applications: a review

2016 ◽  
Vol 22 (1) ◽  
pp. 123-143 ◽  
Author(s):  
Sunpreet Singh ◽  
Rupinder Singh
Keyword(s):  
Investment Casting ◽  
Biomedical Applications ◽  
Design Methodology ◽  
State Of The Art ◽  
Fused Deposition Modelling ◽  
Content Type ◽  
Biomedical Implant ◽  
Fused Deposition ◽  
Manufacturing Organizations ◽  
Machine Parts

Purpose – This paper aims to review the industrial and biomedical applications of state-of-the-art fused deposition modelling (FDM)-assisted investment casting (FDMAIC). Brief literature survey of methodologies, ideas, techniques and approaches used by various researchers is highlighted and use of hybrid feedstock filament-based pattern to produce metal matrix composite is duly discussed. Design/methodology/approach – Pattern replica required for investment casting (IC) of biomedical implant, machine parts, dentistry and other industrial components can be directly produced by using FDM process is presented. Relevant studies and examples explaining the suitability of FDMAIC for various applications are also presented. Findings – Researches to optimize the conventional IC with FDM solutions and develop new hybrid feedstock filament of FDM done by researchers worldwide are also discussed. The review highlights the benefit of FDMAIC to surgeons, engineers and manufacturing organizations. Research limitations/implications – The research related to this survey is limited to the suitability and applicability of FDMAIC. Originality/value – This review presents the information regarding potential IC application, which facilitates the society, engineers and manufacturing organizations by providing variety of components for assisting FDM. The information reported in this paper will serve doctors, researchers, organizations and academicians to explore the new options in the field of FDMAIC.

Precision investment casting: A state of art review and future trends

2016 ◽  
Vol 230 (12) ◽  
pp. 2143-2164 ◽  
Author(s):  
Sunpreet Singh ◽  
Rupinder Singh
Keyword(s):  
Rapid Prototyping ◽  
Investment Casting ◽  
Biomedical Applications ◽  
Medical Science ◽  
Future Research ◽  
Fused Deposition Modelling ◽  
Future Trends ◽  
Fused Deposition ◽  
Cast Specimen ◽  
State Of Art

Investment casting process is known to its capability of producing clear net shape, high-dimensional accuracy and intricate design. Consistent research effort has been made by various researchers with an objective to explore the world of investment casting. Literature review revealed the effect of processing parameters on output parameters of cast specimen. This article highlights the advancements made and proposed at each step of investment casting and its hybridization with other process. Besides, investment casting has always been known to manufacture parts such as weapons, jewellery item, idols and statues of god and goddess since 3000 BC; this article reviews the present applications and trends in combination of rapid prototyping technique as integrated investment casting to serve in medical science. Advancements in shell moulding with incorporation of fibre and polymer, development of alternative feedstock filament to fused deposition modelling are duly discussed. The aim of this review article is to present state of art review of investment casting since 3200 BC. This article is organized as follows: in section ‘Introduction’, introduction to investment casting steps is given along with researches undertaken at each step; in section ‘Rapid prototyping technique’, background is given on the concept of rapid prototyping technique by examining the various approaches taken in the literature for defining rapid prototyping technique; section ‘Biomedical applications of RPT’ presents the medicine or biomedical applications of investment casting and rapid prototyping technique; section ‘Future trends’ provides some perspectives on future research and section ‘Conclusion’ closes the article by offering conclusions.

Optimal assembling of 3D printed features by modulation of interfacial behaviour

2019 ◽  
Vol 25 (1) ◽  
pp. 13-21
Author(s):  
Justin Favero ◽  
Sofiane Belhabib ◽  
Sofiane Guessasma ◽  
Hedi Nouri
Keyword(s):  
Design Methodology ◽  
Acrylonitrile Butadiene Styrene ◽  
Interfacial Phenomena ◽  
Fused Deposition Modelling ◽  
Content Type ◽  
Fused Deposition ◽  
Interfacial Behaviour ◽  
3D Printed ◽  
Practical Implications ◽  
Butadiene Styrene

Purpose Assembling items to achieve bigger parts seems to be the solution to counterbalance the dimension limits of 3D printing. This work aims to propose an approach to achieve optimal assembling. Design/methodology/approach Acrylonitrile butadiene styrene polymer samples were printed using fused deposition modelling (FDM). These samples were assembled and the precise contribution of interfacial shearing and tension was measured using simple tensile experiments. Findings The results achieved show the correlation between the printing orientation and the assembling angle. It could be proved that rupture by an interfacial decohesion mechanism of glued parts can be avoided by simple adaptation of the assembling junction. Practical implications Design of large parts using FDM is no more a limitation if assembling configurations are adapted based on the knowledge gained about the interfacial phenomena occurring at the junction position. Originality/value The unbalanced contribution of shearing and tension at the interface defines new assembling profiles that exclude flat junctions.

Plate auto-level system for fused deposition modelling (FDM) 3D printers

2017 ◽  
Vol 23 (2) ◽  
pp. 401-413 ◽  
Author(s):  
Enrique Soriano Heras ◽  
Fernando Blaya Haro ◽  
José María de Agustín del Burgo ◽  
Manuel Enrique Islán Marcos
Keyword(s):  
Design Methodology ◽  
Fused Deposition Modelling ◽  
Content Type ◽  
Open Hardware ◽  
Fused Deposition ◽  
Sensing System ◽  
3D Printers ◽  
The Cost ◽  
Ultrasound Sensing ◽  
Practical Implications

Purpose The purpose of this paper is to present a solution for the levelling plate of fused deposition modelling (FDM) additive manufacturing (AM) systems. This automatic levelling system is presented as an evolution of actual systems, which uses a new ultrasound sensing system. Design/methodology/approach After obtaining a prototype, different tests were conducted for getting a system which solves the level plate problem and can be mounted in any FDM AM machine. Several benchmark models were obtained and compared with current equipment concepts for the validity of the product. Findings All tests were performed with high accuracy, enabling the production of geometries that could not have been achieved without this novel system. Practical implications This development will enable experienced users to set aside the problems of calibration and focus on the purpose of this type of machines, making prototypes. Originality/value A system architecture has been developed and integrated into an open hardware AM system, allowing real-time adjustment of the plate during each layer, thus eliminating the need of levelling the plate, allowing to achieve easier printing, and without increasing the cost significantly.

Fused deposition modelling interfacial and interlayer bonding in PLA post-processed parts

2019 ◽  
Vol 26 (3) ◽  
pp. 585-592 ◽  
Author(s):  
Ana P. Valerga Puerta ◽  
S.R. Fernandez-Vidal ◽  
Moises Batista ◽  
F. Girot
Keyword(s):  
Polylactic Acid ◽  
Design Methodology ◽  
Internal Quality ◽  
Fused Deposition Modelling ◽  
Content Type ◽  
Chemical Treatments ◽  
Fused Deposition ◽  
Partial Crystallization ◽  
Interlayer Bonding

Purpose This paper aims to study the interfacial and interlayer bonding of Polylactic acid parts manufactured by fused deposition modelling. Different layer thicknesses are analysed in the manufacture of these pieces and the lack of material associated with this parameter is verified. The influence of the immersion of these parts in different solvents is also studied, as they are increasingly used in the improvement of the surface finish. Tomography results are also obtained in which the increase in density of the parts subjected to these treatments is demonstrated. Design/methodology/approach The material used in this study is a 1.75-mm diameter polylactic acid (PLA) filament from fused filament fusion world. Monolayer and multilayer samples have been manufactured. The manufactured parts were subjected to solvent immersion for a period of 60 s. The solvents used are chloroform (CHCl3), dichloromethane (CH2Cl2), tetrahydrofuran (C4H8O) and ethyl acetate (C4H8O2). The pieces were then dried for 48 h. The interior of the samples was evaluated by two techniques: microscopy and tomography. Findings With this study, it has been observed that the thickness of the layer affects the porosity interfacial to a greater extent than in the interlayer, causing the increase in porosity as this thickness is increased.The impact of different chemical treatments (immersions in different solvents) on the internal quality of the parts has been evaluated. All the solvents analysed soften the surface as they cause the softening of the material and its possible redistribution. In the interior, however, they affect in a lighter way. The retention of solvents in the porosity of the pieces is also checked, especially pronounced in the areas close to the surface. Finally, changes are observed in the density of the pieces, related to the partial crystallization of the samples. Originality/value All that has been studied shows that the application of chemical post-processes not only affects the surface texture of the parts, or the less studied mechanical properties, but also affects the interfacial union of the parts in a very different way. This is the first study carried out on this aspect with polylactic acid (PLA) and post-processing methods.

Information processing by elderly consumers: a five-decade review

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Gianluigi Guido ◽  
Marco Pichierri ◽  
Cristian Rizzo ◽  
Verdiana Chieffi ◽  
George Moschis
Keyword(s):  
Information Processing ◽  
Design Methodology ◽  
State Of The Art ◽  
Relevant Literature ◽  
Academic Research ◽  
The Elderly ◽  
Marketing Strategies ◽  
Content Type ◽  
Processing Activity ◽  
Elderly Consumers

Purpose The purpose of this study is to review scholarly research on elderly consumers’ information processing and suggest implications for services marketing. Design/methodology/approach The review encompasses a five-decade period (1970–2018) of academic research and presents relevant literature in four main areas related to information processing: sensation, attention, interpretation and memory. Findings The study illustrates how each of the aforementioned phases of the information processing activity may affect how elderly individuals buy and consume products and services, emphasizing the need for a better comprehension of the elderly to develop effectual marketing strategies. Originality/value The study provides readers with detailed state-of-the-art knowledge about older consumers’ information processing, offering a comprehensive review of academic research that companies can use to improve the effectiveness of their marketing efforts that target the elderly market.

Learning from criticisms of quality management

2015 ◽  
Vol 7 (2/3) ◽  
pp. 201-216 ◽  
Author(s):  
Gilles Barouch ◽  
Stéphane Kleinhans
Keyword(s):  
Quality Management ◽  
Literature Review ◽  
Design Methodology ◽  
State Of The Art ◽  
Senior Managers ◽  
Content Type ◽  
Adequate Response ◽  
Academic Results

Purpose – This paper aims at summing up the main criticisms concerning quality management (QM) in order to address them through objective arguments or extant research. Since its diffusion in the Occident in the 70s, QM gained as much approvals as criticisms. Therefore, with 40 years distance, it seems useful to sum up the main criticisms addressed to QM, to present a synthesis of the answers provided by researchers to these criticisms and to propose extant research when it appears that some criticisms have not received yet the adequate response. Design/methodology/approach – This paper is based on a literature review. Findings – This paper comes up with a list of the main criticisms addressed to QM. Then, main causes of criticisms are identified: ignorance of QM, confusion concerning QM definitions and theory and misuse of QM by senior managers. At last, QM organizational solutions are proposed which answer most expressed criticisms. Extant research tracks are considered for those relevant criticisms which have not been sufficiently addressed until now. Research limitations/implications – Further research will look into depicting a survey conducted among QM professionals concerning QM criticisms in their organization and confronting them to these academic results. Originality/value – This paper actualizes and completes Giroux and Landry’s (1998) article which dealt extensively with QM criticisms. Professionals will find in this paper answers to most criticisms against QM and a better understanding of the present limits of this discipline. Researchers will be provided with a state of the art concerning this sensitive topic, allowing them to go deeper in the fields that require special attention.

Animal orthosis fabrication with additive manufacturing – a case study of custom orthosis for chicken

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Wiktoria Maria Wojnarowska ◽  
Jakub Najowicz ◽  
Tomasz Piecuch ◽  
Michał Sochacki ◽  
Dawid Pijanka ◽  
...  
Keyword(s):  
Veterinary Medicine ◽  
Additive Manufacturing ◽  
Computer Aided Design ◽  
Three Dimensional ◽  
Fused Deposition Modelling ◽  
Content Type ◽  
Fused Deposition ◽  
Secondary Objective ◽  
Traditional Manufacturing ◽  
Aided Design

Purpose Chicken orthoses that cover the ankle joint area are not commercially available. Therefore, the main purpose of this study is to fabricate a customised temporary Ankle–Foot Orthosis (AFO) for a chicken with a twisted ankle using computer-aided design (CAD) and three-dimensional (3D) printing. The secondary objective of the paper is to present the specific application of Additive Manufacturing (AM) in veterinary medicine. Design/methodology/approach The design process was based on multiple sketches, photos and measurements that were provided by the owner of the animal. The 3D model of the orthosis was made with Autodesk Fusion 360, while the prototype was fabricated using fused deposition modelling (FDM). Evaluation of the AFO was performed using the finite element method. Findings The work resulted in a functional 3D printed AFO for chicken. It was found that the orthosis made with AM provides satisfactory stiffen and a good fit. It was concluded that AM is suitable for custom bird AFO fabrication and, in some respects, is superior to traditional manufacturing methods. It was also concluded that the presented procedure can be applied in other veterinary cases and to other animal species and other parts of their body. AM provides veterinary with a powerful tool for the production of well-fitted and durable orthoses for animals. Research limitations/implications The study does not include the chicken's opinion on the comfort or fit of the manufactured AFO due to communication issues. Evaluation of the final prototype was done by the researchers and the animal owner. Originality/value No evidence was found in the literature on the use of AM for chicken orthosis, so this study is the first to describe such an application of AM. In addition, the study demonstrates the value of AM in veterinary medicine, especially in the production of devices such as orthoses.

Corporate social responsibility practices developed by Mexican family and non-family businesses

2019 ◽  
Vol 9 (1) ◽  
pp. 40-53 ◽  
Author(s):  
José Luis Esparza Aguilar
Keyword(s):  
Design Methodology ◽  
State Of The Art ◽  
Family Businesses ◽  
University Education ◽  
Quintana Roo ◽  
Southern State ◽  
Content Type ◽  
Mexican Family ◽  
Corporate Social ◽  
Practical Implications

Purpose The purpose of this paper is to identify the CSR practices developed by Mexican family and non-family MSMEs. The study also aims to compare the CSR practices carried out by family and non-family businesses in a country with an emergent economy. Design/methodology/approach The paper opted for an exploratory study using a sample of 384 businesses was selected in the southern state of Quintana Roo, Mexico, distributed in 245 family and 139 non-family businesses and a questionnaire was applied directly to the managers/owners. Findings The results show that family MSMEs develop CSR practices to a higher extent than non-family ones, mainly on environment and societal dimensions. In addition, CSR practices in family-owned enterprises develop to a higher extent when the manager/owner has more years of experience in the business, has a higher university education and the size of the business is larger. Research limitations/implications The study was developed exclusively with a MSMEs sample with a scope only on the southern part of Quintana Roo, Mexico; the shortage of business databases and the stratification of businesses based exclusively on the number of employees. This work presents information that contributes to the state of the art, broadening the existing literature related to CSR in businesses of a country with an emergent economy and an environment where the tourism and commercial sectors predominate. Practical implications This paper provides information to government institutions for the establishment of public policies targeted for an increase of CSR activities by businesses in the area. Manager and/or owners can understand the importance of implementing CSR activities within the business as a competitive strategy. It is also important for universities, professors/researchers and for all interested parties. Originality/value This paper provides theoretical and empirical evidence about CSR practices carried out among family and non-family MSMEs in an emergent economy.

Printing with mechanically interlocked extrudates using a custom bi-extruder for fused deposition modelling

2018 ◽  
Vol 24 (6) ◽  
pp. 921-934 ◽  
Author(s):  
Mohammad Abu Hasan Khondoker ◽  
Asad Asad ◽  
Dan Sameoto
Keyword(s):  
Cross Sections ◽  
Acrylonitrile Butadiene Styrene ◽  
Easy Access ◽  
Fused Deposition Modelling ◽  
Content Type ◽  
Immiscible Polymers ◽  
Fused Deposition ◽  
Functionally Gradient ◽  
Different Sources ◽  
Butadiene Styrene

Purpose This paper aims to target to print functionally gradient materials (FGM) devices made of immiscible polymers in multi-material fused deposition modelling (FDM) systems. The design is intended to improve adhesion of dissimilar thermoplastics without the need for chemical compatibilization so that filaments from many different sources can be used effectively. Therefore, there is a need to invent an alternative solution for printing multiple immiscible polymers in an FDM system with the desired adhesion. Design/methodology/approach In this study, the authors have developed a bi-extruder for FDM systems which can print two thermoplastics through a single nozzle with a static intermixer to enhance bonding between input materials. The system can also change the composition of extrudates continuously. Findings The uniqueness of this extruder is in its easy access to the internal channel so that a static intermixer can be inserted, enabling deposition of mechanically interlocked extrudates composed of two immiscible polymers. Without this intermixer, the bi-extruder extrudes with simple side-by-side co-extrusion having no mechanical interlocking. The bi-extruder was characterized by printing objects using pairs of materials including polylactic acid, acrylonitrile butadiene styrene and high impact polystyrene. Microscope images of the cross-sections of the extrudates confirm the ability of this bi-extruder to control the composition as desired. It was also found that the mechanically interlocked extrudates composed of two immiscible polymers substantially reduces adhesion failures within and between filaments. Originality/value In this study, the first-ever FDM extruder with a mechanical blending feature next to the nozzle has been designed and used to successfully print FGM objects with improved mechanical properties.

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