Disadvantages of the selective laser sintering technology in the manufacture models for investment casting

Dementyeva, J. N.; Кашапов, Р Н; Кашапов, Н. Ф.; Kashapov, L N

doi:10.1088/1757-899x/570/1/012015

Cited by 6 publications

(4 citation statements)

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“…SLS may include a cold period of up to 12 hours, extending the production period. Additionally, it results in poor mechanical properties in the samples and has the potential for distortion geometry if the technological processes for wax impregnation are not followed [60]. It is challenging to obtain single-phase material with the annealing process in SLM.…”

Section: Negative Aspects Of the Cnt Composites' Methods Of Preparationmentioning

confidence: 99%

Carbon Nanotube (CNT) Composites and its Application; A Review

Alhakeem¹

2022

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Due to their superior mechanical, thermal, electrical, and tri-biological characteristics, carbon nanotubes (CNTs) have been widely used in a variety of industries, from aerospace to energy, since their discovery in 1991. Their compact size, amazing tensile strength, and light weight They are often used as reinforcements in metals, plastics, and even additive manufacturing due to their popularity and conductivity. In this analysis, we present a list of these structures and an in-depth discussion of the CNT-reinforced materials can be processed using a variety of techniques, including chemical vapor deposition (CVD), ball milling, both laser melting and hot pressing. The restrictions in the production and processing of these composites additionally discussed, strengthened by many authored works. To comprehend how these composites' properties change in relation to other parameters, such as a wide range of variables, such as temperature, CNT length, diameter, etc. A summary is given, explaining various methods for performing experimental analysis and providing convincing arguments for putting the changes' causes in. Therefore, we investigate the specialized uses of these CNT-reinforced composites in industries like aerospace, energy, biomedicine, and auto, and how they can be handled further, altered to make room for less expensive and more effective fixes going forward.

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Section: Negative Aspects Of the Cnt Composites' Methods Of Preparationmentioning

confidence: 99%

Carbon Nanotube (CNT) Composites and its Application; A Review

Alhakeem¹

2022

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“…The remaining powder in the construction tank can be reused in subsequent prints. The main disadvantage of SLS is that the obtained model is porous and requires further finishing to make it more rigid [ 16 ]. The accuracy of the printed parts is very good, the finishing of the printed surfaces is superior, the printing speed is high, and the spectacles frames can be subjected to post-production treatment in several stages to obtain colors and finishing.…”

Section: The Process Of Manufacturing Spectacles Frames Using 3d Prin...mentioning

confidence: 99%

Innovation Process for Optical Face Scanner Used to Customize 3D Printed Spectacles

2022

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Many people for different reasons end up wearing glasses to correct their vision. From time immemorial, there has been an unquestionable ability to associate people with glasses. Designing the glasses according to the physiognomy of each person opens a new path for a completely new optical experience. The frames are designed to fit perfectly on the face, are comfortable on the nose, and are positioned at an optimal distance from the cheeks and eyelashes. Three-dimensional printing technology offers the possibility to customize any form of glasses at a low cost with average quality. In this type of technology, the printer receives a digitized model of the spectacle frame (usually in STL file format) that must meet the parameters related to the wearer’s anatomy. Therefore, this paper presents an innovative process, an optical method used to scan the wearer’s face to design a parameterized design of the spectacle frames. The procedure has a measurement phase for quantifying the anatomical features of the wearer’s face, a para-metric design phase of the glasses for adjusting the design parameters according to the anatomical characteristics, and a manufacturing phase in which the custom eyeglass frame will be manufactured using 3D printing technology. The aim of this study was to create an innovative process that could be tested as an educational 3D printing system that could be used by undergraduate students (studying under an optometry program), a process that would begin at optometric prescription stage and can be used in the educational laboratory of the Department of Mechatronics and Precision Mechanics from the Politehnica University of Bucharest. Using this method we obtained a custom spectacle frame that can be prototyped using 3D printing. The 3D-printed polylactic acid (PLA) frames are lightweight, flexible, durable, and the innovative photogrammetry process gives designers the ability to create custom designs that cannot be created with traditional manufacturing techniques.

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“…Although scalability is achieved through larger beam size and fast laser‐scanning speeds, challenges such as the resolution limit due to particle size, high surface roughness and high porosity of the finished products, thermal shrinking and warping of the printed structures, and thermal requirements on materials limit the wide‐applicability of laser sintering technology. [ 48 ]…”

Section: Introductionmentioning

confidence: 99%

“…Although scalability is achieved through larger beam size and fast laser-scanning speeds, challenges such as the resolution limit due to particle size, high surface roughness and high porosity of the finished products, thermal shrinking and warping of the printed structures, and thermal requirements on materials limit the wideapplicability of laser sintering technology. [48] An emerging technique, bubble-pen lithography (BPL), has been developed to overcome some of the limitations in the current bottom-up fabrication methods. [49] In brief, BPL exploits laser heating of the substrate or solution to generate light-controlled microbubbles for the concentration and immobilization of ink materials (e.g., colloids, polymers, biomolecules, and ions) on the substrate.…”

Section: Introductionmentioning

confidence: 99%

Bubble‐pen lithography: Fundamentals and applications

Kollipara

Mahendra

et al. 2022

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Developing on-chip functional devices requires reliable fabrication methods with high resolution for miniaturization, desired components for enhanced performance, and high throughput for fast prototyping and mass production. Recently, laser-based bubble-pen lithography (BPL) has been developed to enable sub-micron linewidths, in situ synthesis of custom materials, and on-demand patterning for various functional components and devices. BPL exploits Marangoni convection induced by a laser-controlled microbubble to attract, accumulate, and immobilize particles, ions, and molecules onto different substrates. Recent years have witnessed tremendous progress in theory, engineering, and application of BPL, which motivated us to write this review. First, an overview of experimental demonstrations and theoretical understandings of BPL is presented. Next, we discuss the advantages of BPL and its diverse applications in quantum dot displays, biological and chemical sensing, clinical diagnosis, nanoalloy synthesis, and microrobotics. We conclude this review with our perspective on the challenges and future directions of BPL.

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Disadvantages of the selective laser sintering technology in the manufacture models for investment casting

Cited by 6 publications

References 1 publication

Carbon Nanotube (CNT) Composites and its Application; A Review

Carbon Nanotube (CNT) Composites and its Application; A Review

Innovation Process for Optical Face Scanner Used to Customize 3D Printed Spectacles

Bubble‐pen lithography: Fundamentals and applications

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