scholarly journals Influence of Technological Parameters on the Emision on DLP 3D Printing Process

2020 ◽  
Vol 70 (12) ◽  
pp. 4387-4392
Keyword(s):  
3D Printing ◽  
Point Of View ◽  
Particulate Emissions ◽  
Technological Parameters ◽  
Printing Process ◽  
Laboratory Activity ◽  
Emission Point ◽  
Measurement Methodology ◽  
Made In

The present work addresses the issue of emissions requires it made in resin polymerization processes at 3D digital light process (DLP) printing. From an emission point of view, both particulate and chemical emissions are analysed in the form of gases during the DLP printing process. In the paper, we present first the element, which are study. In second part of the paper, we presented the printer, material for printing, measuring apparatus for emission and measurement methodology. In the three part of paper, we made the determinations for gas emissions. Will follow the determinations for particulate emissions. In the final chapter, the data generated by the printing emissions related to the problems specific to the laboratory activity and it has made the specific conclusion in rapport with the printing process. Keywords: 3D printing; emission particles; air pollution, resin material, DLP printing

Influence of Constructive and Technological Parameters at Generated Spiral Parts with DLP 3D Printing Process

2019 ◽  
Vol 56 (4) ◽  
pp. 801-811
Author(s):  
Mircea Dorin Vasilescu
Keyword(s):  
3D Printing ◽  
Great Influence ◽  
Polymerization Process ◽  
Generation Process ◽  
Technological Parameters ◽  
Printing Process ◽  
The Third ◽  
Solid Models ◽  
Specific Factors ◽  
Printing Processes

This work are made for determine the possibility of generating the specific parts of a threaded assembly. If aspects of CAD generating specific elements was analysed over time in several works, the technological aspects of making components by printing processes 3D through optical polymerization process is less studied. Generating the threaded appeared as a necessity for the reconditioning technology or made components of the processing machines. To determine the technological aspects of 3D printing are arranged to achieve specific factors of the technological process, but also from the specific elements of a trapezoidal thread or spiral for translate granular material in supply process are determined experimentally. In the first part analyses the constructive generation process of a spiral element. In the second part are identified the specific aspects that can generation influence on the process of realization by 3D DLP printing of the two studied elements. The third part is affected to printing and determining the dimensions of the analysed components. We will determine the specific value that can influence the process of making them in rapport with printing process. The last part is affected by the conclusions. It can be noticed that both the orientation and the precision of generating solid models have a great influence on the made parts.

scholarly journals Influence of Technological Parameters on the Dimension of GEAR Parts Generated with PLA Matherial by FDM 3D Printing

2018 ◽  
Vol 55 (2) ◽  
pp. 247-251 ◽  
Author(s):  
Mircea Dorin Vasilescu ◽  
Traian Fleser
Keyword(s):  
Computer Simulation ◽  
3D Printing ◽  
Gear Tooth ◽  
Energy Resource ◽  
Electric Machines ◽  
Resource Consumption ◽  
Point Of View ◽  
Technological Parameters ◽  
Functional Characteristics

The purpose of this research is to establish the technology of 3D printable production on the principle of FDM of gears made of PLA, ABS and PETG mainly. In the paper we present first the dimensional generation and specific aspects that need to be considered to produce gears with internal or external teeth of the cylindrical type with vertical or inclined teeth. Generating the gears appeared as a necessity for the reconditioning of the components of the processing machines and of the electric machines made both in the process of elaboration of the bachelor�s and the laboratory works, with reduced energy resource consumption and low pollution as low as possible. After the construction, we past to identify the dimension that have implications for both mechanical and kinematic resistance to achieve a product with good cinematic and functional characteristics. After that are made an analysis of the layers generated, both from the computer simulation and from the point of view of the analysis of layers physically generated on a gear tooth with external teeth.

scholarly journals Technical considerations on the 3D printing components with DLP 3D printing process with ecological resin

2020 ◽  
Vol XXIII (1) ◽  
pp. 34-40
Author(s):  
Mircea Dorin Vasilescu
Keyword(s):  
3D Printing ◽  
Control Programme ◽  
Point Of View ◽  
Technological Parameters ◽  
Technical Parameters ◽  
Dimensional Measurement ◽  
Organic Resin ◽  
And Control ◽  
Measurement And Control ◽  
Technical Considerations

The purpose of this work is to analyse the technological aspects of the realization of components by 3D printing for the production of plan parts for experimental devices or stands. The author of this work envisages the realization of flat elements to which it can be determined how the organic resin material behaves when printing 3D with additive DLP technology. The work is structured in 5 chapters. In the first chapter, an analysis of how to make the plan elements by the additive DLP technology specific to the experimental programme adopted in this paper. The analysis will be carried out both constructively and functionally taking into account possibilities for designing components and making them. Chapter two is allocated to ordering technological parameters for 3D printing generation of parts defining the main technical parameters for generating them with ecological resin. The next chapter is allocated to analysing how to carry out the printer command program and check the structure of the element. In the four chapter, the dimensional measurement and control programme with dimensional and optical is presented. The last chapter is allocated to conclusions and comparisons from a technological point of view compared to other specific technologies for generating the analysed elements.

scholarly journals Economic and technogical considerations on the 3d printing components in university laboratories made from students

2019 ◽  
Vol XXII (1) ◽  
pp. 261-268
Author(s):  
Vasilescu M. D.
Keyword(s):  
3D Printing ◽  
Physical And Mechanical Properties ◽  
Point Of View ◽  
Fused Deposition Modelling ◽  
Technological Parameters ◽  
Digital Light Processing ◽  
Practical Applications ◽  
Technical Parameters ◽  
Fused Deposition ◽  
Component Design

The scope of this research is to analyse the economic aspects of the 3D printing parts for making parts and functional sub-assemblies for different machinery. The author intends in this work to make a clarification on the economic approaches of processing FDM (Fused Deposition Modelling) and DLP (Digital Light Processing) materials which can be used for generating mechanically required items. The paper it is structured in 5 chapters. In the first chapter, there is an ordering of the materials based on the literature, but also from its own experience in generating parts by 3D printing. Synthesis is made both in terms of physical and mechanical properties, but also from the point of view of economic as well. It should be shown that the comparison will also be made from the point of view of 3D printing generation since two different printing processes are used both as the principle of generation and the way of obtaining the 3D parts. For generating, two printers will be used, which both constructively and functionally will be analysed, both as functionality and as component design possibilities. The second chapter affected to the ordering of technological parameters of 3D generation by printing the parts with defining the main technical parameters of generation of the parts. This step is important both to ensure the assembly conditions of the components, but also to the fact that the materials used to make the parts produce different comportment after the three directions in terms of contractions and the variation of the dimensions. The third chapter analyses the main ways of generating the parts with the presentation of some of the domain-specific elements generated by 3D printing with FDM and DLP. In the fourth chapter is presented the economic calculation program made with practical applications related to the parts generated in the previous chapter. The last chapter is allocated to the conclusions and comparisons from the technologicaleconomical point of view compared to other specific technologies for generating the analysed parts.

scholarly journals FABRICATION CYCLES COMPARISON OF ASSEMBLIES AND MONOLITHIC PARTS MADE BY 3D PRINTING METHOD

2021 ◽  
Vol 13 (3) ◽  
pp. 158-163
Author(s):  
Kinga Skrzek ◽  
◽  
Mariusz Piotr Hetmanczyk ◽  
Keyword(s):  
3D Printing ◽  
Three Dimensional ◽  
Post Processing ◽  
Material Consumption ◽  
Printing Process ◽  
Practical Applications ◽  
Energy Consuming ◽  
Definition Of ◽  
Printing Method ◽  
Made In

The article presents an analysis of the time-consuming, energy-consuming, and cost-consuming nature of 3D printing a three-dimensional polymer components made in two separate approaches: assembly and monolith structure of various materials (automatic filament change required). The introduction includes the definition of 3D printing, its advantages and examples of practical applications, as well as the reason for undertaking the researches described in the article. The justification of the form of 3D sample models was discussed in detail, as well as the methodology adopted by the authors for comparing the print characteristics and the steps of the printing cycles (print preparation, the course of the printing process and post-processing). A comparison of the materials consumption in the phasess of manual and automatic filament change in the mixer were also described. The test printout was made on the Prusa i3 MK3S printer for filament deposition (FDM or FFF methods). For automatic filament mixing, the Palette 2 Pro device was used. The conclusions also include guidelines for the design and production of models made in one continuous printing cycle (using automatic filament feeding devices). Monolithic elements are less accurate, while elements with replaceable filaments are cheaper, less energy-consuming and the material consumption is lower.

scholarly journals On the technological and dimensional considerations for generating parts by 3D-printed with light processing focus

2019 ◽  
Vol XXII (1) ◽  
pp. 289-296
Author(s):  
Vasilescu M. D.
Keyword(s):  
3D Printing ◽  
Optical Microscope ◽  
Point Of View ◽  
Surface Generation ◽  
Digital Light Processing ◽  
Printing Process ◽  
Flat Surfaces ◽  
3D Printed ◽  
The One ◽  
The Cost

The paper takes into account the specific process of generation and parameters setting of 3D printing process DLP (Digital Light Processing) which have an influence on the characteristics of planar surface of the parts. In the first part of the paper the study is conduct to determinate the parameters which can influence the process of implementation of flat surfaces pieces with 3D DLP process printing. In this part there is and a comparison with the method of generating the marker method 3D printing FDM (Fuse Deposit Modelling). It has chosen this solution because on the one hand the cost of parts are medium, as well as generating principle is relatively simple in terms of technological point of view, but as well as the accuracy and quality of surface generation made with this printing is much better than that provided by the process of asking for a comparison is made. Analysis of the surface will be done so about using an optical microscope with a magnification of 0-500 times, and by means of an electronic measure for dimensional parts as well as for spatial areas of the deviations generated. In it also make references to the methodology of generating flat surfaces and to influence the way their generation characteristics of the parts generated by the 3D printing process type DLP. It should be pointed out that from the perspective of the characteristics of the surfaces generated in literature there are few references in this direction being those areas indicated in the area, as well as acting, although the products have engineering applications.

Economical Considerations over 3D Printing Components for Abrasive Water Jet Machinery

2018 ◽  
Vol 1146 ◽  
pp. 84-91 ◽  
Author(s):  
Mircea Dorin Vasilescu ◽  
Tiberiu Aurel Vasilescu ◽  
Ioan Vasile Groza
Keyword(s):  
3D Printing ◽  
Water Jet ◽  
Point Of View ◽  
Abrasive Waterjet ◽  
Fused Deposition Modelling ◽  
Technological Parameters ◽  
Processing Equipment ◽  
3D Print ◽  
Fused Deposition ◽  
Technological Field

The purpose of this research is to analyse the technological and economical aspects of making 3D print pieces to produce functional parts and subassemblies for abrasive waterjet processing equipment. The authors of this paper intend to make a clarification on the technological and economic approaches of material that can be used to make such a reference in terms of economic efficiency and technology. In the paper are analysed all the aspects involved in generating the necessary elements on the mechanical side of them by FDM (Fused Deposition Modelling). The paper is structured in a five chapters in which it is presented in a logical order the analysis of the materials that can be used in the mentioned technological field, the technological parameters specific to the analysed process, the method of generating the parts and their realization from a practical point of view and presenting the main economic aspects that involve the manufacturing costs of specific parts through 3D printing technology for components of water jet processing equipment with suspension abrasive media.

BIO-ENERGY FROM PHOTOSYNTHETIC ALLOYS FOR USE IN BIOGUALS AND BIOPRODUCTS

2019 ◽  
pp. 613-618
Author(s):  
Petar Kazakov ◽  
Atanas Iliev ◽  
Emil Ivanov ◽  
Dobri Rusev
Keyword(s):  
Technical Progress ◽  
Point Of View ◽  
Energy Sustainability ◽  
International Activities ◽  
Made In

Significant technical progress has been made in recent years in the development of algae-based bioenergy, and much of industrial and academic R&D projects have diverged from the biofuels strategy. This report summarizes the conclusions of a recently concluded symposium analyzing the prospects for using micro- and macroalgae as a feedstock for biofuels and bioenergy. It discusses international activities for the development of bio-energy and non-energy algae bioproducts, advances in the use of macroalgae (both non-cultivated and cultivated algae). Applications for various biochemical and thermochemical uses, bio-refining capabilities for various products, as well as an in-depth review of the process from the point of view of economy and energy sustainability are also given.

Conclusions

2018 ◽  
Author(s):  
Amy Strecker
Keyword(s):  
International Law ◽  
Eu Law ◽  
World Heritage Convention ◽  
State Practice ◽  
The World ◽  
State Obligations ◽  
Made In ◽  
Landscape Protection

The final chapter of this book advances four main conclusions on the role of international law in landscape protection. These relate to state obligations regarding landscape protection, the influence of the World Heritage Convention and the European Landscape Convention, the substantive and procedural nature of landscape rights, and the role of EU law. It is argued that, although state practice is lagging behind the normative developments made in the field of international landscape protection, landscape has contributed positively to the corpus of international cultural heritage law and indeed has emerged as a nascent field of international law in its own right.

scholarly journals Against management: Auto-critique

Organization ◽  
2021 ◽  
pp. 135050842110209
Author(s):  
Martin Parker
Keyword(s):  
Business School ◽  
Western Europe ◽  
Business Schools ◽  
The Uk ◽  
North Western ◽  
Made In ◽  
Highly Cited

In this review I consider the 20 years that have passed since the publication of my book Against Management. I begin by locating it in the context of the expanding business schools of the UK in the 1990s, and the growth of CMS in north western Europe. After positioning the book within its time, and noting that the book is now simultaneously highly cited and irrelevant, I then explore the arguments I made in the final chapter. If the book is of interest for the next two decades, it because it gestures towards the importance of alternative forms of organization, which I continue to maintain are not reducible to ‘management’. Given the intensifying crises of climate, ecology, inequality and democracy, developing alternatives must be understood as the historical task of CMS within the business school and I propose a ten-point manifesto in support of that commitment.

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