scholarly journals Optimization of Extrusion Process Parameters for Red Lentil-carrot Pomace Incorporated Ready-to-eat Expanded Product Using Response Surface

2014 ◽  
Vol 2 (7) ◽  
pp. 106-119 ◽  
Author(s):  
Md. Shafiq Alam ◽  
Sunil Kumar
Keyword(s):  
Response Surface ◽  
Process Parameters ◽  
Extrusion Process

scholarly journals Optimization of Extrusion Process Using Response Surface Methodology for Producing Squid and Millet Based Extrudate

2021 ◽  
Vol 22 (2) ◽  
Author(s):  
Viswanth Ganesan ◽  
Balasundari Subbaiah ◽  
Nimish Mol Stephen ◽  
Manikandavelu Dhanushkodi ◽  
Rathnakumar Kolandaivadivel ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Process Parameters ◽  
Extrusion Process ◽  
Expansion Ratio ◽  
Domestic Consumption ◽  
Screw Speed ◽  
Food Grain ◽  
Density Expansion ◽  
Product Weight

The squid is underutilized seafood than finfish and shellfishes in domestic consumption and millet is also an underutilized food grain. This study aimed to produce squid and millet- based extrudate under the optimized process parameters using Response Surface Methodology (RSM). The effects of process parameters such as heater 1 temperature (55°C, 60°C and 65°C), heater 2 temperature (120°C, 125°C and130°C), screw speed (250 rpm, 275 rpm and 300 rpm), and inclusion of squid powder (3%, 4%, 5%, 6% and 7%) were tested for responses like bulk density, expansion ratio and fifty product weight in RSM. All process parameters tested had significant (P<0.05) impact on responses. The optimized parameters were found to be 64.10°C of heater 1 temperature, 129.98°C of heater 2 temperature, screw speed of 317.87 rpm, and 6.56% of inclusion of squid powder.

scholarly journals Optimizing Laser Powder Bed Fusion Parameters for IN-738LC by Response Surface Method

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4879
Author(s):  
Mireia Vilanova ◽  
Rubén Escribano-García ◽  
Teresa Guraya ◽  
Maria San Sebastian
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Process Parameters ◽  
Crack Density ◽  
Processing Parameters ◽  
Optimum Process ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Surface Method

A method to find the optimum process parameters for manufacturing nickel-based superalloy Inconel 738LC by laser powder bed fusion (LPBF) technology is presented. This material is known to form cracks during its processing by LPBF technology; thus, process parameters have to be optimized to get a high quality product. In this work, the objective of the optimization was to obtain samples with fewer pores and cracks. A design of experiments (DoE) technique was implemented to define the reduced set of samples. Each sample was manufactured by LPBF with a specific combination of laser power, laser scan speed, hatch distance and scan strategy parameters. Using the porosity and crack density results obtained from the DoE samples, quadratic models were fitted, which allowed identifying the optimal working point by applying the response surface method (RSM). Finally, five samples with the predicted optimal processing parameters were fabricated. The examination of these samples showed that it was possible to manufacture IN738LC samples free of cracks and with a porosity percentage below 0.1%. Therefore, it was demonstrated that RSM is suitable for obtaining optimum process parameters for IN738LC alloy manufacturing by LPBF technology.

Numerical Analysis on the Extruded Volume and Length Ratios of Backward Tube to Forward Rod in Combined Extrusion Processes

2006 ◽  
Vol 519-521 ◽  
pp. 919-924 ◽  
Author(s):  
B.S. Ham ◽  
J.H. Ok ◽  
Jung Min Seo ◽  
Beong Bok Hwang ◽  
K.H. Min ◽  
...  
Keyword(s):  
Process Parameters ◽  
Material Flow ◽  
Volume Ratio ◽  
Forward Direction ◽  
Extrusion Process ◽  
Forming Load ◽  
Tube Extrusion ◽  
Corner Radius ◽  
Combined Operation ◽  
Simulation Results

This paper is concerned with forward rod extrusion combined simultaneously with backward tube extrusion process in both steady and transient states. The analysis has been conducted in numerical manner by employing a rigid-plastic finite element method. AA 2024 aluminum alloy was selected as a model material for analysis. Among many process parameters, major design factors chosen for analysis include frictional condition, thickness of tube in backward direction, punch corner radius, and die corner radius. The main goal of this study is to investigate the material flow characteristics in combined extrusion process, i.e. forward rod extrusion combined simultaneously with backward tube extrusion process. Simulation results have been summarized in term of relationships between process parameters and extruded length and volume ratios, and between process parameters and force requirements, respectively. The extruded length ratio is defined as the ratio of tube length extruded in backward direction to rod length extruded in forward direction, and the volume ratio as that of extruded volume in backward direction to that in forward direction, respectively. It has been revealed from the simulation results that material flow into both backward and forward directions are mostly influenced by the backward tube thickness, and other process parameters such as die corner radius etc. have little influence on the volume ratio particularly in steady state of combined extrusion process. The pressure distributions along the tool-workpiece interface have been also analyzed such that the pressure exerted on die is not so significant in this particular process such as combined operation process. Comparisons between multi-stage forming process in sequence operation and one stage combined operation have been also made in terms of forming load and pressure exerted on die. The simulation results shows that the combined extrusion process has the greatest advantage of lower forming load comparing to that in sequence operation.

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