scholarly journals Optimisation of Shrinkage and Strength on Thick Plate Part Using Recycled LDPE Materials

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1795
Author(s):  
Norshahira Roslan ◽  
Shayfull Zamree Abd Rahim ◽  
Abdellah El-hadj Abdellah ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Katarzyna Błoch ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Thick Plate ◽  
Processing Parameters ◽  
Processing Parameter ◽  
Plastic Injection Moulding ◽  
Optimal Setting ◽  
Quality Of Products ◽  
Validation Tests ◽  
Plastic Injection

Achieving good quality of products from plastic injection moulding processes is very challenging, since the process comprises many affecting parameters. Common defects such as warpage are hard to avoid, and the defective parts will eventually go to waste, leading to unnecessary costs to the manufacturer. The use of recycled material from postindustrial waste has been studied by a few researchers. However, the application of an optimisation method by which to optimise processing parameters to mould parts using recycled materials remains lacking. In this study, Response Surface Methodology (RSM) and Particle Swarm Optimisation (PSO) methods were conducted on thick plate parts moulded using virgin and recycled low-density polyethylene (LDPE) materials (100:0, 70:30, 60:40 and 50:50; virgin to recycle material ratios) to find the optimal input parameters for each of the material ratios. Shrinkage in the x and y directions increased in correlation with the recycled ratio, compared to virgin material. Meanwhile, the tensile strength of the thick plate part continued to decrease when the recycled ratio increased. R30 (70:30) had the optimum shrinkage in the x direction with respect to R0 (100:0) material where the shrinkage increased by 24.49% (RSM) and 33.20% (PSO). On the other hand, the shrinkage in the y direction for R30 material increased by 4.48% (RSM) and decreased by 2.67% (PSO), while the tensile strength of R30 (70:30) material decreased by 0.51% (RSM) and 2.68% (PSO) as compared to R0 (100:0) material. Validation tests indicated that the optimal setting of processing parameter suggested by PSO and RSM for R0 (100:0), R30 (70:30), R40 (60:40) and R50 (50:50) was less than 10%.

scholarly journals Practical Applications of Taguchi Method for Optimization of Processing Parameters for Plastic Injection Moulding: A Retrospective Review

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Ng Chin Fei ◽  
Nik Mizamzul Mehat ◽  
Shahrul Kamaruddin
Keyword(s):  
Taguchi Method ◽  
Injection Moulding ◽  
Principal Component ◽  
Processing Parameters ◽  
Great Success ◽  
Processing Parameter ◽  
Practical Applications ◽  
Multiple Parameters ◽  
Plastic Injection Moulding ◽  
Plastic Injection

Determining the optimal processing parameter is routinely performed in the plastic injection moulding industry as it has a direct and dramatic influence on product quality and costs. In this volatile and fiercely competitive market, traditional trial-and-error is no longer sufficient to meet the challenges of globalization. This paper aims to review the research of the practical use of Taguchi method in the optimization of processing parameters for injection moulding. Taguchi method has been employed with great success in experimental designs for problems with multiple parameters due to its practicality and robustness. However, it is realized that there is no single technique that appears to be superior in solving different kinds of problem. Improvements are to be expected by integrating the practical use of the Taguchi method into other optimization approaches to enhance the efficiency of the optimization process. The review will shed light on the standalone Taguchi method and integration of Taguchi method with various approaches including numerical simulation, grey relational analysis (GRA), principal component analysis (PCA), artificial neural network (ANN), and genetic algorithm (GA). All the features, advantages, and connection of the Taguchi-based optimization approaches are discussed.

Production of Aluminum/SiC/NiAl2O4 MMCs by Thixoforming of Recycled Chips

2014 ◽  
Vol 217-218 ◽  
pp. 286-293 ◽  
Author(s):  
Lygia Maria Policarpio Ferreira ◽  
Maria Helena Robert ◽  
Emin Bayraktar
Keyword(s):  
Liquid Phase ◽  
Processing Parameters ◽  
Reinforcing Particles ◽  
Sic Particles ◽  
Energy Processing ◽  
Quality Of Products ◽  
Reinforcement Distribution ◽  
Processing Steps

The work explores the production of Al/SiC and Al/SiC/NiAl2O4composites by thixoforming compacted mixtures of AA7075 machining chips and reinforcing particles. It is analyzed the influence of processing parameters in the various processing steps, such as mixing, compacting, heating and thixoforming, in the final quality of products. Results showed the general viability of producing composites by the proposed technique; the utilization of recycling material is particularly important in the high demanding energy processing sector, as the Al industry. NiAl2O4particles and, in less extent, also SiC particles, can penetrate into the liquid phase present in the thixotropic microstructure within the chip, promoting their disaggregation; reinforcement distribution in the composite depends on appropriate choose of processing parameters.

Processing Parameters Optimization for Stagger Spinning of Trapezoidal Inner Gear

2011 ◽  
Vol 189-193 ◽  
pp. 2754-2758 ◽  
Author(s):  
Xiu Quan Cheng ◽  
Ling Yan Sun ◽  
Qin Xiang Xia
Keyword(s):  
Gear Tooth ◽  
Orthogonal Experiment ◽  
New Technology ◽  
Dimensional Accuracy ◽  
Processing Parameters ◽  
Parameters Optimization ◽  
Gray Relational Analysis ◽  
Processing Parameter ◽  
Forming Quality

Spin-forming of trapezoidal inner gear is a new technology of the near-net forming in gear manufacturing field. Processing parameters, such as the initial thickness of blank and radial reductions of each roller, greatly influence the forming quality of spun part. The forming quality of trapezoidal inner gear involves the filling status of gear tooth and dimensional accuracy of root circle. An approach for processing parameter optimization of the forming quality of the trapezoidal inner gear stagger spinning is proposed. The proposed approach integrates the orthogonal experiment design, gray relational analysis, and analysis of variance (ANOVA). The experiment result indicates that the proposed approach is effective in determining the optimized processing parameters for the stagger spinning of trapezoidal inner gear.

Optimization Processing Parameter of 6061-T6 Alloy Friction Stir Welded Using Taguchi Technique

2016 ◽  
Vol 840 ◽  
pp. 294-298 ◽  
Author(s):  
Mohd Haslam Mohd Hanapi ◽  
Zuhailawati Hussain ◽  
Indra Putra Almanar ◽  
Anasyida Abu Seman
Keyword(s):  
Tensile Strength ◽  
Aluminium Alloy ◽  
Feed Rate ◽  
Rotational Speed ◽  
Parametric Design ◽  
Processing Parameters ◽  
Optimization Approach ◽  
Processing Parameter ◽  
Friction Stir ◽  
Tool Shoulder

Taguchi approach was applied to evaluate the processing parameter to determine the most influential control factors which will yield better tensile strength of friction stir welded joint of 6061-T6 aluminium alloy. The processing parameters involved are tool shoulder diameter, in mm (18 ,20, 22), tool rotational speed, in rpm (410, 865, 1140), and feed rate, in mm/min (22, 32, 45). Taguchi parametric design and optimization approach was used. Through the Taguchi parametric design approach, the optimum levels of process parameters were determined. The results indicate that the shoulder size, rotational speed, and feed rate are the significant parameters influencing the tensile strength and hardness of the joint. The predicted optimal values of tensile strength 6061-T6 aluminium alloy is 321.16 MPa. The results was confirmed by further experiments, where the experimented values for tensile strength is 301.28 MPa.

scholarly journals Optimization of Friction Stir Processing Parameters for Aluminum Alloy (AA6061-T6) Using Taguchi Method

2019 ◽  
Vol 12 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Muna K. Abbassa ◽  
Noor Alhuda B. Sharhan
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Ultimate Tensile Strength ◽  
Taguchi Method ◽  
Friction Stir Processing ◽  
Thick Plate ◽  
Processing Parameters ◽  
Friction Stir ◽  
Tool Tilt Angle

This work is devoted toward optimization of the parameters of the friction stir processing (FSP) which effect on tensile strength of aluminium alloy AA6061-T6 of 6mm thick plate by applying a certain number of tests utilizing the Taguchi method. Design of experiment (DOE) has been applied for the determination of the most important parameters influencing ultimate tensile strength. FSP was achieved under three different rotation speeds (800,1000 and 1250) rpm, different transverse speeds (16,25 and 32) mm\min, and number passes(1,2 and 3)  in the same direction and tool tilt angle was 2°  with using threaded cylindrical pin profile.  The best FSP parameters were 1250 rpm and 32 mm\min and two passes. It was found that the higher hardness value was 75HV in stir zone center and then decreases toward the TMAZ, HAZ and the base metal

The Influence of Processing Parameters on the Void Content and Compressive Strength of Carbon Fibre-Epoxy Laminates

2011 ◽  
Vol 275 ◽  
pp. 243-246
Author(s):  
Xiao Wen Yuan ◽  
S. Bickerton ◽  
Samuel Bradley ◽  
Arry Tapiheroe ◽  
John Little
Keyword(s):  
Compressive Strength ◽  
Carbon Fibre ◽  
Void Fraction ◽  
Processing Parameters ◽  
Positive Pressure ◽  
Void Content ◽  
Processing Parameter ◽  
The Impact ◽  
Carbon Fibre Composites

This research addresses the influence of various processing parameters on the post cure quality of carbon fibre composites. Four processing parameters were investigated in the study, in terms of their impact on void content and overall compressive strength. The first parameter distinguishes between laminates cured in a vacuum oven and those cured in an autoclave under high positive pressure. The second parameter describes the impact on voids of differing fibre architectures, comparing a unidirectional fibre structure to that of woven cloth. Thirdly, the influence of compaction during manufacture is analysed and lastly, variation in cure temperature was tested to determine its effect on final laminate quality. The quality of the cured laminate samples was assessed from visual inspection, and in terms of compressive strength and void fraction calculated by Micro-CT X-ray Tomography. The results show that autoclave-cured samples feature significant quality improvements in terms of void fraction and compressive strength when compared to oven-cured samples. Unidirectional laminates incur higher sensitivity to void inclusion than cloth laminates due to the influence of fibre wrinkling. Compaction has no effect on laminate strength; it does however reduce variability in certain cases. Temperature affects different fibre structures in different ways, these being highly dependent on curing method. Finally, it was discerned that curing by autoclave was the dominant processing parameter. Thus, regardless of other manufacturing techniques, the autoclave samples featured almost zero voids and were consequently of the highest quality.

scholarly journals Mechanical Reinforcement of Polyamide 6 by Cold Hydrostatic Extrusion

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6045
Author(s):  
Monika Skorupska ◽  
Mariusz Kulczyk ◽  
Sylwia Przybysz ◽  
Jacek Skiba ◽  
Jan Mizeracki ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Tensile Strength ◽  
Flexural Modulus ◽  
Tensile Modulus ◽  
Polyamide 6 ◽  
Hydrostatic Extrusion ◽  
Mechanical Reinforcement ◽  
Quality Of Products ◽  
High Plastic

This paper presents the effect of severe plastic deformation obtained using the cold hydrostatic extrusion (HE) method on the mechanical and structural properties of polyamide 6 (PA6). As a result of the plastic strain, a significant increase in ultimate tensile strength and tensile modulus were observed. Tensile strength rose by almost 500%, up to the level of 508 MPa, whereas the tensile modulus rose by about 65%. Flexural modulus increase was also observed to 3230 MPa, i.e., by approx. 160%. As a result of high plastic deformation, the structure of the polyamide 6 changed significantly, as evidenced by its fibrous nature as presented in the results of the scanning electron microscopy inspection (SEM). The surface quality of products investigated was tested using profilometry.

CONTROL IN REAL TIME THE DENSITY OF PRODUCT AT VARIOUS STAGES OF THE TECHNOLOGICAL PROCESS OF SUGAR PRODUCTION

2020 ◽  
Author(s):  
S.B. Kudryashev ◽  
◽  
N.S. Assev ◽  
R.D. Belashov ◽  
V.A. Naumenko ◽  
...  
Keyword(s):  
Real Time ◽  
Technological Process ◽  
Sugar Industry ◽  
Sugar Production ◽  
Production Processes ◽  
Quality Of Products

The article is devoted to solving one of the most important problems of the development of the sugar industry in Russia – the modernization of sugar production processes. Today, sugar production is actively being modernized, shifting most of its processes to the path of avomatization and optimization to improve the quality of products. This article describes one of the main ways to obtain information about the concentration of sucrose in syrup in the production of sugar.

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