Rapid Development Technology of Mobile Phone Shell Basing on the Selective Laser Sintering

2012 ◽  
Vol 198-199 ◽  
pp. 123-127
Author(s):  
Chong You Feng ◽  
Jin Mei Zhang ◽  
Zheng Yu Zhang ◽  
Li Ping Li
Keyword(s):  
Mobile Phone ◽  
Orthogonal Experiment ◽  
Rapid Development ◽  
Selective Laser Sintering ◽  
Processing Parameters ◽  
Laser Sintering ◽  
Technological Parameters ◽  
Optimum Processing ◽  
Development Technology ◽  
Warpage Deformation

According to the characteristics of mobile phone shell, the mobile phone products model provided by Pro/E software, analyzed the technological parameters of warpage deformation influence, and designed the orthogonal experiment plan, Verified the plan on SINTERSTATION HIQ + HS selective laser sintering system, carried out optimum processing parameters of the minimum warping deformation.

Effects of the Processing Parameters on Porosity of Selective Laser Sintered Aliphatic Polycarbonate

2014 ◽  
Vol 915-916 ◽  
pp. 1000-1004 ◽  
Author(s):  
Xiao Hui Song ◽  
Yu Sheng Shi ◽  
Ping Hui Song ◽  
Qing Song Wei ◽  
Wei Li
Keyword(s):  
Mechanical Properties ◽  
Biomedical Engineering ◽  
Laser Power ◽  
Orthogonal Experiment ◽  
Selective Laser Sintering ◽  
Processing Parameters ◽  
Laser Sintering ◽  
Optimal Parameters ◽  
Micro Structure ◽  
Aliphatic Polycarbonate

Selective Laser Sintering (SLS) has been successfully and broadly applied in biomedical engineering to fabricated biomedical part. And the porosity and microstructure of part can be controlled by main sintered parameters. This research focused aliphatic Polycarbonate (PC) sintered with SLS. According to the orthogonal experiment, the effect of laser power energy and interaction between main sintered parameters on porosity has been studied. Then the micro structure and mechanical properties of specimens sintered with the best optimal parameters have been analyzed.

scholarly journals Selective Laser Melting of PA 2200 for Hip Implant Applications: Finite Element Analysis, Process Optimization, and Morphological and Mechanical Characterization

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4240
Author(s):  
Răzvan Păcurar ◽  
Petru Berce ◽  
Anna Petrilak ◽  
Ovidiu Nemeş ◽  
Cristina Ştefana Miron Borzan ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Surface Roughness ◽  
Finite Element ◽  
Selective Laser Sintering ◽  
Processing Parameters ◽  
Laser Sintering ◽  
Compression Tests ◽  
Element Analysis ◽  
Polyamide 12 ◽  
Research Activities

Polyamide 12 (PA 22000) is a well-known material and one of the most biocompatible materials tested and used to manufacture customized medical implants by selective laser sintering technology. To optimize the implants, several research activities were considered, starting with the design and manufacture of test samples made of PA 2200 by selective laser sintering (SLS) technology, with different processing parameters and part orientations. The obtained samples were subjected to compression tests and later to SEM analyses of the fractured zones, in which we determined the microstructural properties of the analyzed samples. Finally, an evaluation of the surface roughness of the material and the possibility of improving the surface roughness of the realized parts using finite element analysis to determine the optimum contact pressure between the component made of PA 2200 by SLS and the component made of TiAl6V4 by SLM was performed.

Research on Processing Parameters Coupling Effects of Selective Laser Sintering Polystyrene

Applied laser ◽  
2014 ◽  
Vol 34 (4) ◽  
pp. 305-309
Author(s):  
王传洋 Wang Chuanyang ◽  
陈瑶 Chen Yao ◽  
董渠 Dong Qu
Keyword(s):  
Selective Laser Sintering ◽  
Processing Parameters ◽  
Laser Sintering ◽  
Coupling Effects

Microstructures and Properties of Cu–AISI304 Parts Fabricated by Improved Selective Laser Sintering

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
Z. L. Lu ◽  
J. H. Liu ◽  
Y. S. Shi
Keyword(s):  
High Performance ◽  
Selective Laser Sintering ◽  
Hot Isostatic Pressing ◽  
Processing Parameters ◽  
Laser Sintering ◽  
Cold Isostatic Pressing ◽  
Isostatic Pressing ◽  
Cu Content ◽  
Mechanical Performances ◽  
Liquid Sintering

For fabricating complex AISI304 parts with high performance by advanced powder/metallurgy technologies, cold isostatic pressing (CIP) is introduced into selective laser sintering (SLS) combined with hot isostatic pressing (HIP), which is abbreviated to selective laser sintering/isostatic pressed (SLS/IP). The effect of processing parameters on the densification of Cu–AISI304 parts is analyzed and then the influence of Cu on their relative densities, metallurgical structures, and mechanical performances are investigated. The results show that relative densities of Cu–AISI304 parts fabricated by SLS/IP are mainly influenced by CIP pressure and sintering temperature, and it is interesting to find that the formula 1−D=(1−D0)e−kP is testified by the CIP of SLS/IP. There is an antidensification phenomenon resulting from Cu and AISI304 in liquid sintering, but the relative densities of Cu–AISI304 parts can be gradually improved in HIP with Cu content increasing from 1 wt % to 3 wt %. After the above-mentioned Cu–AIS304 parts are finally hot isostatic pressed, their metallurgical structures consist of sosoloid (Cu,Ni) and (Fe,Ni) besides austenite (Fe,Cr,Ni,C), their best mechanical performances are close to those of solution treated compact AISI304 when Cu content is 3 wt %.

Rapid Manufacturing Technique of Casting Mould Based on the SLS

2011 ◽  
Vol 291-294 ◽  
pp. 2970-2973
Author(s):  
Hong Feng Zhang ◽  
Wei Hang Chang
Keyword(s):  
Rapid Prototyping ◽  
High Voltage ◽  
Rapid Development ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Rapid Manufacturing ◽  
Forming Process ◽  
Technological Support ◽  
Manufacturing Technique ◽  
Rapid Prototyping System

Selective laser sintering (SLS) is one of relatively mature rapid prototyping technologies at present day. This paper takes the forming of a high voltage switch casting model in the AFS-3000 rapid prototyping system as example to describe the forming process of SLS, and introduce the casting model rapid prototyping technology based on SLS. This research provides a powerful technological support for rapid development of casting products.

scholarly journals Improvement on Selective Laser Sintering and Post-Processing of Polystyrene

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 956 ◽  
Author(s):  
Zhi Zeng ◽  
Xiaohu Deng ◽  
Jiangmei Cui ◽  
Hai Jiang ◽  
Shuo Yan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Orthogonal Experiment ◽  
Selective Laser Sintering ◽  
Single Layer ◽  
Dimensional Accuracy ◽  
Amorphous Polymers ◽  
Laser Sintering ◽  
Temperature Fields ◽  
Post Processing ◽  
Forming Process

Amorphous polymers are heavily utilized materials in selective laser sintering (SLS) due to their good dimensional accuracy. However, sintered parts of amorphous polymers cannot be used as functional parts owing to their poor forming performance, including their low relative densities and tensile strength. Therefore, post-processing methods are employed to enhance the mechanical properties of amorphous polymers SLS parts without damaging their relatively high dimensional accuracy. In this study, the forming process of selective laser sintering (SLS) and post-processing on polystyrene (PS) was investigated. The orthogonal experiment was designed to obtain the optimal combination of process parameters. The effect of a single process parameter and the laser volumetric energy density (LVED) on dimension accuracy and warpage of the sintered parts were also discussed. In addition, a three-dimensional (3D) thermal model was developed to analyze the temperature fields of single-layer SLS parts and PS powder sintering mechanism. Then, infiltrating with epoxy resin was employed to enhance the mechanical properties of the PS parts. Good resin-infiltrated formulation was obtained based on the mechanical property tests and fractured surface analysis. This research provides guidance for SLS process and post-processing technology in polymers.

Investigation into Indirect Selective Laser Sintering Alumina Ceramic Parts Combined with Cold Isostatic Pressing

2012 ◽  
Vol 217-219 ◽  
pp. 2217-2221 ◽  
Author(s):  
Kai Liu ◽  
Chen Hui Li ◽  
Wen Ting He ◽  
Yu Sheng Shi ◽  
Jie Liu
Keyword(s):  
Bending Strength ◽  
Orthogonal Experiment ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Cold Isostatic Pressing ◽  
Alumina Ceramic ◽  
Alumina Powder ◽  
Isostatic Pressing ◽  
Scan Speed ◽  
Resin Binder

To obtain complex shape alumina ceramic parts, a composite powder of epoxy resin binder E-06 and alumina powder are laser sintered combined with cold isostatic pressing(CIP). An orthogonal experiment is carried out to probe the influencing factors of selective laser sintering (SLS) alumina green parts. When preheating temperature, laser power, scan speed, scan spacing and layer thickness are, respectively, 60°C,14 w, 2000 mm/s, 0.10 mm/s and 0.10 mm, the density and bending strength of alumina parts are relatively high. Then, airproof canning prepared for CIP is manufactured in the vacuum environment. Finally, the optimized SLS/CIP alumina parts are degreased and sintered in 1600 °C to produce crack-free alumina parts. The sintered relative density of the parts however is limited to only 57% but the forming integrity during SLS and CIP remains after sintering.

The Optimization Design Study of Selective Laser Sintering Process Parameters on the Pro-Coated Sand Mold

2011 ◽  
Vol 55-57 ◽  
pp. 853-858
Author(s):  
Rong Cheng ◽  
Xiao Yu Wu ◽  
Jian Ping Zheng
Keyword(s):  
Layer Thickness ◽  
Process Parameters ◽  
Laser Power ◽  
Selective Laser Sintering ◽  
Dimensional Accuracy ◽  
Processing Parameters ◽  
Laser Sintering ◽  
Process Variables ◽  
Scan Speed ◽  
Coated Sand

This paper presents experimental investigations on influence of important process parameters viz., laser power, scan speed, layer thickness, hatching space along with their interactions on dimensional accuracy of Selective Laser Sintering (SLS) processed pro-coated sand mold. It is observed that dimensional error is dominant along length and width direction of built mold. Optimum parameters setting to minimize percentage change in length and width of standard test specimen have been found out using Taguchi’s parameter design. Optimum process conditions are obtained by analysis of variance (ANOVA) is used to understand the significance of process variables affecting dimension accuracy. Scan speed and hatching space are found to be most significant process variables influencing the dimension accuracy in length and width. And laser power and layer thickness are less influence on the dimension accuracy. The optimum processing parameters are attained in this paper: laser power 11 W; scan speed 1200 mm/s; layer thickness 0.5 mm and hatching space 0.25 mm. It has been shown that, on average, the dimensional accuracy under this processing parameters combination could be improved by approximately up to 25% compared to other processing parameters combinations.

Influence of SLS processing parameters according to the new mathematical model on flexural properties

2016 ◽  
Vol 22 (2) ◽  
pp. 258-268 ◽  
Author(s):  
Ana Pilipović ◽  
Bogdan Valentan ◽  
Mladen Šercer
Keyword(s):  
Mathematical Model ◽  
Selective Laser Sintering ◽  
Processing Parameters ◽  
Laser Sintering ◽  
Flexural Properties ◽  
Content Type ◽  
Manufacturing Procedure ◽  
Fabrication Parameters ◽  
Selection Of

Purpose The purpose of this paper is the selection of production parameters in selective laser sintering – SLS for the production of quality products (e.g. good mechanical properties). The manufacturing procedure affects the properties, which is especially significant in additive procedures, as the products are not cheap and the procedure and material need to be optimally selected. Design/methodology/approach The paper presents an analysis of the fabrication parameters in selective laser sintering (SLS) that affect the flexural properties of the finished product. Findings The influence of a new parameter has been found, the overlay ratio, and using the mathematical and scheme method, the selection of parameters for obtaining the optimal flexural properties has been proposed. Originality/value The paper presents a new mathematical model for the calculation of the processing parameters in SLS of polymer products and gives a diagram for the determination of which parameters are the best to use for practical purposes.

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