Model of Filling the Internal Structure of Workpiece with Curved Layers for 3D Printing

Mapping Intimacies ◽

10.21741/9781644901755-56 ◽

2022 ◽

Author(s):

A.N. Grechukhin

Keyword(s):

3D Printing ◽

Internal Structure ◽

Helical Line ◽

Technological Equipment ◽

Generalized Model ◽

Research Results ◽

Conical Shape ◽

Curve Layer

Abstract. This paper presents a solution to the problem of filling the internal structure of the workpiece with curve layer in 3D printing. A generalized model of filling the internal structure of workpiece with curve layer is designed. The results are presented for solving the problem on the example of curved layers of a conical shape with filling along a helical line. The research results can be in demand in the development of algorithms and software for technological equipment. They allow to ensure the formation of the internal structure of products in curved layers during 3D printing.

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Evaluation of the 3D Printing Accuracy of a Dental Model According to Its Internal Structure and Cross-Arch Plate Design: An In Vitro Study

Materials ◽

10.3390/ma13235433 ◽

2020 ◽

Vol 13 (23) ◽

pp. 5433

Author(s):

Seung-Ho Shin ◽

Jung-Hwa Lim ◽

You-Jung Kang ◽

Jee-Hwan Kim ◽

June-Sung Shim ◽

...

Keyword(s):

3D Printing ◽

Internal Structure ◽

Three Dimensional ◽

In Vitro Study ◽

Thick Shell ◽

Plate Design ◽

Dental Model ◽

3D Printed ◽

Modeling Data

The amount of photopolymer material consumed during the three-dimensional (3D) printing of a dental model varies with the volume and internal structure of the modeling data. This study analyzed how the internal structure and the presence of a cross-arch plate influence the accuracy of a 3D printed dental model. The model was designed with a U-shaped arch and the palate removed (Group U) or a cross-arch plate attached to the palate area (Group P), and the internal structure was divided into five types. The trueness and precision were analyzed for accuracy comparisons of the 3D printed models. Two-way ANOVA of the trueness revealed that the accuracy was 135.2 ± 26.3 µm (mean ± SD) in Group U and 85.6 ± 13.1 µm in Group P. Regarding the internal structure, the accuracy was 143.1 ± 46.8 µm in the 1.5 mm-thick shell group, which improved to 111.1 ± 31.9 µm and 106.7 ± 26.3 µm in the roughly filled and fully filled models, respectively. The precision was 70.3 ± 19.1 µm in Group U and 65.0 ± 8.8 µm in Group P. The results of this study suggest that a cross-arch plate is necessary for the accurate production of a model using 3D printing regardless of its internal structure. In Group U, the error during the printing process was higher for the hollowed models.

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Bend Testing of Parts Made by Rapid Prototyping with Respect to Possible Use in Robotics

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.760.141 ◽

2015 ◽

Vol 760 ◽

pp. 141-146 ◽

Cited By ~ 3

Author(s):

Jan Lipina ◽

Václav Krys ◽

Jiří Marek

Keyword(s):

3D Printing ◽

Rapid Prototyping ◽

Experimental Determination ◽

Internal Structure ◽

Detailed Knowledge ◽

3D Printer ◽

Bend Strength ◽

Bend Testing ◽

Material Parameters

Recently, the Rapid Prototyping technology (RP hereafter) has been increasingly used for a final product, which requires detailed knowledge of designing parts made by the RP technology. In order to apply parts made by the RP technology in robotics, and design in general, in a wider range, one of the most important material parameters is their bend strength. The paper describes an experimental determination of bend strength in parts printed on a 3D printer. The parts were made of polycarbonate. The tests were carried out in parts with various types of internal structure. The achieved results can be implemented when designing parts made by 3D printing provided that professional printers are used.

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Creation of internal structure of mashed potato construct by 3D printing and its textural properties

Food Research International ◽

10.1016/j.foodres.2018.05.075 ◽

2018 ◽

Vol 111 ◽

pp. 534-543 ◽

Cited By ~ 46

Author(s):

Zhenbin Liu ◽

Bhesh Bhandari ◽

Sangeeta Prakash ◽

Min Zhang

Keyword(s):

3D Printing ◽

Internal Structure ◽

Textural Properties

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A review of the newest 3D printing technology for metal objects

Mechanik ◽

10.17814/mechanik.2017.7.89 ◽

2017 ◽

Vol 90 (7) ◽

pp. 612-614 ◽

Cited By ~ 1

Author(s):

Jarosław Tatarczak ◽

Zbigniew Krzysiak ◽

Waldemar Samociuk ◽

Zdzisław Kaliniewicz ◽

Leszek Krzywonos

Keyword(s):

3D Printing ◽

Printing Technology ◽

Research Results ◽

3D Printing Technology ◽

Metal Material ◽

The Way

The article presents the newest technologies of the 3D printing of metal objects. The technologies were classified on account of the way of laying and joining material. The research results are indicated the advantages and the disadvantages of the various methods of joining metal material. There is presented a brief description of the technology of the 3D printing which using a metal material, and lists of manufacturers who offering the device in the technology.

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3D Printing of Parts with Intra-Layer Variable Density

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.799.288 ◽

2019 ◽

Vol 799 ◽

pp. 288-293

Author(s):

Angelos Vassilakos ◽

John Giannatsis ◽

Vasilios Dedousis

Keyword(s):

3D Printing ◽

Relative Density ◽

Internal Structure ◽

Variable Density ◽

Functionally Graded ◽

Density Values ◽

Time Part ◽

Innovative Potential ◽

Short Time ◽

Complex Parts

3D Printing can be considered as one of the most innovative manufacturing processes of our time. Part of the innovative potential of 3D Printing is associated with the production of geometrically complex parts in a relatively short time. In the present paper, a methodology for the production of parts with complex internal structure and intra-layer density variability (ILDV) is presented. The proposed methodology may be used to produce structures composed by two materials, such as functionally graded parts and composites. The variability of the internal structure and composition is captured through voxel modeling, where at each voxel a unique relative density value for each material is assigned. These relative density values are then translated to predefined extrusion paths, which the 3D printer follows for the construction of layers composed by one or two materials. Representative cases and examples of parts with ILDV are presented and discussed.

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Technical innovations as a means of increasing the efficiency of technological equipment in modern production conditions

MATEC Web of Conferences ◽

10.1051/matecconf/201821201014 ◽

2018 ◽

Vol 212 ◽

pp. 01014 ◽

Cited By ~ 1

Author(s):

Denis Skibo ◽

Vera Sudnikovich ◽

Mikhail Tolstoy

Keyword(s):

Working Conditions ◽

Technological Equipment ◽

System Operation ◽

Research Results ◽

Technical Innovations ◽

Water Disposal ◽

Municipal Engineering ◽

Technical Solutions ◽

Production Conditions

This article presents a study of the possibilities of technological equipment in municipal engineering, as well as technical innovations to improve its efficiency. The authors review the research on a hydraulic mode and resistances in a working body of a technological equipment. The research results are determined by the introduction of new technical solutions aimed at increasing the efficiency in the work of the Vodokanal enterprises. Improvement of technological equipment is as a result of the improved working conditions in the process of the water disposal system operation.

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Synchrotron Microbeam Diffraction Studies on the Alignment within 3D-Printed Smectic-A Liquid Crystal Elastomer Filaments during Extrusion

Crystals ◽

10.3390/cryst11050523 ◽

2021 ◽

Vol 11 (5) ◽

pp. 523

Author(s):

Marianne E. Prévôt ◽

Senay Ustunel ◽

Benjamin M. Yavitt ◽

Guillaume Freychet ◽

Caitlyn R. Webb ◽

...

Keyword(s):

Liquid Crystal ◽

3D Printing ◽

Internal Structure ◽

Smart Materials ◽

Time Resolved ◽

Promote Cell Proliferation ◽

Liquid Crystal Elastomer ◽

Smectic A ◽

3D Printed ◽

Liquid Crystal Elastomers

3D printing of novel and smart materials has received considerable attention due to its applications within biological and medical fields, mostly as they can be used to print complex architectures and particular designs. However, the internal structure during 3D printing can be problematic to resolve. We present here how time-resolved synchrotron microbeam Small-Angle X-ray Diffraction (μ-SAXD) allows us to elucidate the local orientational structure of a liquid crystal elastomer-based printed scaffold. Most reported 3D-printed liquid crystal elastomers are mainly nematic; here, we present a Smectic-A 3D-printed liquid crystal elastomer that has previously been reported to promote cell proliferation and alignment. The data obtained on the 3D-printed filaments will provide insights into the internal structure of the liquid crystal elastomer for the future fabrication of liquid crystal elastomers as responsive and anisotropic 3D cell scaffolds.

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Generalizing Boolean Satisfiability I: Background and Survey of Existing Work

Journal of Artificial Intelligence Research ◽

10.1613/jair.1353 ◽

2004 ◽

Vol 21 ◽

pp. 193-243 ◽

Cited By ~ 14

Author(s):

H. E. Dixon ◽

M. L. Ginsberg ◽

A. J. Parkes

Keyword(s):

Internal Structure ◽

High Performance ◽

Boolean Satisfiability ◽

Performance Characteristics ◽

Cardinality Constraints ◽

Fundamental Idea ◽

Research Results ◽

The Third ◽

Computational Performance ◽

Theoretical Structure

This is the first of three planned papers describing ZAP, a satisfiability engine that substantially generalizes existing tools while retaining the performance characteristics of modern high-performance solvers. The fundamental idea underlying ZAP is that many problems passed to such engines contain rich internal structure that is obscured by the Boolean representation used; our goal is to define a representation in which this structure is apparent and can easily be exploited to improve computational performance. This paper is a survey of the work underlying ZAP, and discusses previous attempts to improve the performance of the Davis-Putnam-Logemann-Loveland algorithm by exploiting the structure of the problem being solved. We examine existing ideas including extensions of the Boolean language to allow cardinality constraints, pseudo-Boolean representations, symmetry, and a limited form of quantification. While this paper is intended as a survey, our research results are contained in the two subsequent articles, with the theoretical structure of ZAP described in the second paper in this series, and ZAP's implementation described in the third.

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Pengaruh Kecepatan, Temperatur dan Infill Terhadap Kualitas dan Kekasaran Kotak Relay Lampu Sign Sepedamotor Hasil dari 3D Printing

SPROCKET JOURNAL OF MECHANICAL ENGINEERING ◽

10.36655/sproket.v2i2.530 ◽

2021 ◽

Vol 2 (2) ◽

pp. 87-99

Author(s):

Joy H Panjaitan ◽

Miduk Tampubolon ◽

Fiktor Sihombing ◽

Jamser Simanjuntak

Keyword(s):

3D Printing ◽

Rough Surface ◽

Fused Deposition Modeling ◽

Nozzle Diameter ◽

Geometric Accuracy ◽

Research Results ◽

3D Printing Technology ◽

Fused Deposition ◽

Deposition Modeling ◽

Work Table

3D printing technology has great potential in today's manufacturing world where one of its uses is in the prototype of a product. One of the most famous and inexpensive 3D printing technologies is the Fused Deposition Modeling (FDM) method. Many studies have been carried out using this FDM method. In this study, the printing of motorbike light relay boxes was carried out using the FDM method with two variations of speed, temperature and infill of each mass. 3D Printing uses a nozzle diameter of 0.4 mm and a work table temperature of 60oC and a height of 0.2 mm for each layer with support every where. From the research results, all the products produced have a rough surface with a level of geometric accuracy ranging from 0.91% for the length dimension and 7.73% for the width dimension of the product.

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