The Printing Parameters Effects on the Dimensional Accuracy of the Parts Made of Photosensitive Resin

2021 ◽  
Vol 396 (1) ◽  
pp. 2000287
Author(s):  
Marius‐Andrei Boca ◽  
Alexandru Sover ◽  
Laurențiu Slătineanu
Keyword(s):  
Dimensional Accuracy ◽  
Photosensitive Resin ◽  
Printing Parameters

Evaluation on some Properties of SL7560 Type Photosensitive Resin and its Fabricated Parts

2011 ◽  
Vol 117-119 ◽  
pp. 1164-1167 ◽  
Author(s):  
Bi Wu Huang ◽  
Ming Yi Chen
Keyword(s):  
Mechanical Properties ◽  
Computer Software ◽  
Tensile Modulus ◽  
Dimensional Accuracy ◽  
Elongation At Break ◽  
Photosensitive Resin ◽  
Control Computer ◽  
Ft Ir ◽  
Processing Material

Stereolithography technique is dealt with the techniques of machinery, laser, numeral control, computer software and photosensitive resins, etc. The quality of the photosensitive resins has direct effect on the dimensional accuracy, mechanical properties of the fabricated parts. Therefore the further research on SL7560 type photosensitive resins is very meaningful and valuable. The properties of SL7560 type photosensitive resin were investigated by some instruments and equipments. Characteristics of FT-IR showed that SL7560 type photosensitive resin belonged to an epoxy-acrylic hybrid photosensitive resin. The experimental results showed that its viscosity at 30°C was 197mPa.s, its critical exposure (Ec) was 5.9mJ/cm2, its penetration depth (Dp) was 0.14mm, the tensile strength of its cured product was 43.7MPa, the tensile modulus was 2549MPa, the elongation at break was 10.7%. With the photosensitive resin as the processing material, the part of a mobile phone shell was fabricated using the Stereolithography Apparatus (HRPL-I), and the quality of the fabricated part was good.

Optimization of Additive Manufacturing for Layer Sticking and Dimensional Accuracy

2019 ◽  
pp. 185-198
Author(s):  
Syed Faiz Ali ◽  
Fasih Munir Malik ◽  
Emin Faruk Kececi ◽  
Burak Bal
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Flow Rate ◽  
Experimental Testing ◽  
Dimensional Accuracy ◽  
Theoretical Modelling ◽  
Bed Temperature ◽  
Nozzle Size ◽  
The Relationship ◽  
Printing Parameters

When the 3D printing process is considered, there are also other parameters, such as nozzle size, flow rate of material, print-speed, print-bed temperature, cooling rate, and pattern of printing. There are also dependencies that will be addressed in between these parameters; for example, if the printing temperature is increased, it is not clear if the viscosity of the material will increase or decrease. This chapter aims to explain the effect of printing temperature on layer sticking while dimensional accuracy is achieved. Theoretical modelling and experimental testing will be performed to prove the relationship. This type of formulation can be later adapted into a slicer program, so that the program automatically selects some of the printing parameters to achieve desired dimensional accuracy and layer sticking.

Rheological and printable behavior of resin – class materials for 3D printing applications

2019 ◽  
Vol 25 (5) ◽  
pp. 801-808
Author(s):  
Jianzhong Shang ◽  
Xin Li ◽  
Zhuo Wang ◽  
Rong Wang ◽  
Hong Zhu
Keyword(s):  
Process Parameters ◽  
Cross Sections ◽  
Rheological Behavior ◽  
Dimensional Accuracy ◽  
Cross Sectional ◽  
Content Type ◽  
Nozzle Height ◽  
Uniform Wall ◽  
The Cross ◽  
Printing Parameters

Purpose This study aims to investigate rheological and extrusion behavior of thermosetting epoxy resins, which to find the universal property and printing parameters for extrusion-based rapid prototyping applications. Design/methodology/approach The thickener proportion greatly influences its viscosity and rheological behavior and therefore plays an important role in the shape of the cross-section of the extrudate. Findings A pseudoplastic (shear-thinning) is a basic requirement for obtaining extruded lines with plump cross-sections. In addition to the effects of the rheological behavior of the composite, shape maintenance and its wettability on the substrate, the cross-sectional geometry of the extrudate is also strongly affected by printing process parameters including the extrusion nozzle height, nozzle moving speed, extrusion rate and critical nozzle height. Proper combinations of these process parameters are necessary to obtain single-line extrudates with plump cross-sections and 3-D objects with dimensional accuracy, uniform wall thickness, good wall uprightness and no wall slumping. Formulas and procedures for determining these extrusion parameters are proposed and demonstrated in experiments. Originality/value The results obtained have been explained in terms of the interactions among the rheological properties of the composite, the shear rate imposed on the composite during extrusion, the wettability of the composite on the substrate and the shape maintenance of the composite during extrusion.

Modeling and Optimization of 3D Printed PLA Material for Maximum Flexural Strength Using Multiple Nonlinear Neuro Regression Analysis

2021 ◽  
Author(s):  
Melih Savran ◽  
Asil Ayaz ◽  
Tuğrul Uslu
Keyword(s):  
Mechanical Properties ◽  
Regression Analysis ◽  
Flexural Strength ◽  
Process Parameters ◽  
Dimensional Accuracy ◽  
Fused Deposition Modelling ◽  
Complex Objects ◽  
Manufacturing Method ◽  
Fused Deposition ◽  
Printing Parameters

Fused deposition modelling (FDM) is a growing additive manufacturing method to produce complex objects without geometrical limitations. In addition, mechanical strength, dimensional accuracy, product development cycle time, and surface properties can be improved depending on the application of the best settings of design variables. There are various printing parameters which influence the mechanical properties and quality of FDM parts. In this study, appropriate printing parameters were determined to obtain desired quality on mechanical properties and dimensional accuracy. Then full factorial design was employed to form experiment set including process parameters. Multiple nonlinear neuro-regression analysis was used for modeling of FDM process. The present study aims at optimization of the FDM process parameters including infill pattern, infill density and build orientation on flexural strength and strain for polylactide (PLA) material. In this regard, optimization algorithms Differential Evolution and Nelder Mead were used to find the best design or elite designs. Third-order polynomial model and hybrid model including polynomial and logarithmic terms were employed as an objective function to define physical phenomena regarding flexural strength and strain, respectively. It was found that (i) maximum flexural strength as 99.66 MPa using a cubic pattern, flat orientation, and 90 % infill density, (ii) minimum ultimate strain as 1.102 % for gyroid pattern, flat orientation, and 47 % infill density.

Influence of Binder Saturation Level on Compressive Strength and Dimensional Accuracy of Powder-Based 3D Printed Geopolymer

2018 ◽  
Vol 939 ◽  
pp. 177-183 ◽  
Author(s):  
Ming Xia ◽  
Behzad Nematollahi ◽  
Jay Sanjayan
Keyword(s):  
Compressive Strength ◽  
Dimensional Accuracy ◽  
The Other ◽  
Saturation Level ◽  
Rate Of Increase ◽  
Building Components ◽  
3D Printed ◽  
Binder Saturation ◽  
Decisive Parameter ◽  
Printing Parameters

Powder-based 3D concrete printing (3DCP) process is highly suitable for producing building components and interior structures that can be later assembled on site. The accuracy and strength of 3D printed concrete components heavily rely on printing parameters, among which the binder saturation is the most decisive parameter. This paper reports the effects of binder saturation level on linear dimensional accuracy and compressive strength of 3D printed geopolymer. A geopolymer composition suitable for the powder-based 3DCP process previously developed by the authors was used in this study. 20 mm cubic specimens were printed with five binder saturation levels (75%, 100%, 125%, 150% and 170%). The results indicated that the increase in binder saturation level resulted in significant increase in compressive strengths of both green and post-processed samples in both directions. Nevertheless, the rate of increase in compressive strength of green samples was significantly higher than the post-processed samples. On the other hand, the increase in binder saturation level significantly reduced the linear dimensional accuracy of green samples in all directions. Nonetheless, the rate of reduction in linear dimensional accuracy in Z-direction was lower than the other two directions.

scholarly journals Study on the influence of technological parameters on 3D printing with sla technology

2021 ◽  
Vol 343 ◽  
pp. 01003
Author(s):  
Andrei Komjaty ◽  
Elena Stela Wisznovszky (Muncut) ◽  
Lavinia Ioana Culda
Keyword(s):  
3D Printing ◽  
Dimensional Accuracy ◽  
Basic Type ◽  
Polymerization Time ◽  
Technological Parameters ◽  
Reference Mark ◽  
Printing Technology ◽  
Photosensitive Resin ◽  
Uv Rays

The influence of the technological parameters of the printing through the SLA (Stereolithography) technology is presented. This printing technology is based on the use of a photosensitive resin, which polymerizes in contact with UV rays with a wavelength of 405nm. An Anycubic Photon Mono printer is used, on which parts are printed, in which the dimensional accuracy and the condition of the resulting surfaces will be analyzed. It will study the influence of the polymerization time of the resin (5s - 10s), of the advance step between the successively deposited layers (0.05mm - 0.2mm), as well as the influence of the placement positioning of the reference mark for printing. A Black basic type, monomer with photo-initiator photosensitive resin will be used made by Anycubic,. A Sony alpha 37 DSLR camera with Sony SAL-100M28 100mm F / 2.8 AF Macro lens will be used to capture images for the resulting surfaces.

Evaluation of geometrical benchmark artifacts containing multiple overhang lengths fabricated using material extrusion technique

2020 ◽  
Vol 14 (3) ◽  
pp. 7296-7308
Author(s):  
Siti Nur Humaira Mazlan ◽  
Aini Zuhra Abdul Kadir ◽  
N. H. A. Ngadiman ◽  
M.R. Alkahari
Keyword(s):  
3D Model ◽  
Laser Scanner ◽  
Dimensional Accuracy ◽  
Fused Deposition Modelling ◽  
Layer By Layer ◽  
Fused Deposition ◽  
Layer Technique ◽  
Subtractive Manufacturing ◽  
Manufacturing Features ◽  
Layer Problem

Fused deposition modelling (FDM) is a process of joining materials based on material entrusion technique to produce objects from 3D model using layer-by-layer technique as opposed to subtractive manufacturing. However, many challenges arise in the FDM-printed part such as warping, first layer problem and elephant food that was led to an error in dimensional accuracy of the printed parts especially for the overhanging parts. Hence, in order to investigate the manufacturability of the FDM printed part, various geometrical and manufacturing features were developed using the benchmarking artifacts. Therefore, in this study, new benchmarking artifacts containing multiple overhang lengths were proposed. After the benchmarking artifacts were developed, each of the features were inspected using 3D laser scanner to measure the dimensional accuracy and tolerances. Based on 3D scanned parts, 80% of the fabricated parts were fabricated within ±0.5 mm of dimensional accuracy as compared with the CAD data. In addition, the multiple overhang lengths were also successfully fabricated with a very significant of filament sagging observed.

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