Optimization of Coating Thickness in a Tangential Fluidized Bed

2014 ◽  
Vol 625 ◽  
pp. 131-135
Author(s):  
Ku Zilati Ku Shaari ◽  
Luqman Hakim Hassan ◽  
Zakaria Man
Keyword(s):  
Fluidized Bed ◽  
Air Temperature ◽  
Process Parameters ◽  
Coating Thickness ◽  
Rotation Speed ◽  
Variance Analysis ◽  
Factors Influencing ◽  
Significant Process ◽  
Disc Rotation ◽  
Disc Rotation Speed

The focal intention of this research was to investigate the factors influencing the coating thickness of urea granule by using modified biopolymer which performed in a tangential fluidized bed. The effects of inlet air temperature, disc rotation speed and spraying rate on coating thickness of urea granule were investigated. In this study, the results showed that the significant process parameters which effect the coating thickness was spraying rate (58.585%), followed by disc rotation speed (21.579%) and inlet air temperature (18.883%). The optimized process parameters in this work were 400C for inlet air temperature, 40 rpm for disc rotation speed and 2 rpm for spraying rate. The confirmation run for this work had verified the conclusion from the variance analysis.

Urea Hardness Optimization in a Fluidized Bed Coating Equipment Using Taguchi Design Method

2014 ◽  
Vol 699 ◽  
pp. 111-117 ◽  
Author(s):  
Luqman Hakim Hassan ◽  
Ku Zilati Ku Shaari ◽  
Zakaria Man
Keyword(s):  
Fluidized Bed ◽  
Air Temperature ◽  
Rotation Speed ◽  
Design Method ◽  
Operating Parameters ◽  
Critical Properties ◽  
Fluidized Bed Coating ◽  
Disc Rotation ◽  
Disc Rotation Speed ◽  
Coating Hardness

This paper describes the use of Taguchi Method in optimizing coating hardness in a tangential fluidized bed coater using modified biopolymer. During the coating process, granular ureas collide among themselves and the wall surface at high velocity. This led to excessive attrition and likely to break the granular ureas into smaller sizes. Hence, hardness is the critical properties during operations such as packaging and stacking. A series of coating experiments were carried out by using the L9 orthogonal array with 3 levels to determine the effect of inlet air temperature (40, 60 and 80OC), disc rotation speed (40, 60 and 80 rpm) and spraying rate (0.5, 1.0 and 2.0 rpm) on hardness of coated granular urea. The optimized operating parameters in this work were 60OC for inlet air temperature, 60 rpm for disc rotation speed and 2 rpm for spraying rate. The results show that the spraying rate was the most significant factor affecting the hardness of the coated granular urea since the contribution was 69.2 %. No confirmations run for this work were necessary since the optimized operating parameters that were discovered was one of the experiments operating parameters.

Cooling Design for the Next Generation Optical Disc Drive

2007 ◽  
Author(s):  
Takayuki Fujimoto ◽  
Nobuyuki Isoshima ◽  
Hiroyuki Toyoda ◽  
Yoshiaki Yamauchi ◽  
Hitoshi Matsushima ◽  
...  
Keyword(s):  
Transfer Rate ◽  
Data Transfer ◽  
Rotation Speed ◽  
Cooling System ◽  
Memory Capacity ◽  
Next Generation ◽  
Optical Disc ◽  
Data Transfer Rate ◽  
Disc Rotation ◽  
Disc Rotation Speed

Recently, the data transfer rate and the memory capacity of optical disc drives have been increasing dramatically. To obtain the high data transfer rate and greater memory capacity, the disc rotation speed and the laser power also need to be increased and these cause an increase in the temperature of the laser diode. Therefore, to develop the next generation optical disc drives, an enhanced cooling system is indispensable for the optical pick-up unit that contains the laser diode. As the temperature of the pick-up unit is influenced by the inside air flow induced by the disc rotation, it is quite necessary to grasp the velocity and temperature distribution inside the drive, and also the influence of the disc rotation speed on the temperature of the pick-up unit. Hence we applied PIV measurements and CFD simulations to visualize the flow field and the internal temperature. Then, during the actual disc recording process we measured the temperature of the pick-up unit and the internal air of the drive. As a result, we made clear the dependence of the disc rotation speed on the pick-up unit temperature. In addition, as an example for next generation optical disc drives, we evaluated the cooling system applying a small axial fan inside the drive and confirmed the validity of this fan system.

scholarly journals RESEARCH OF EFFECTIVENESS OF DISK SHAPED ELEMENTS FOR OIL REMOVAL / DISKINIŲ NAFTOS SURINKIMO ELEMENTŲ EFEKTYVUMO TYRIMAS

2016 ◽  
Vol 7 (6) ◽  
pp. 624-627
Author(s):  
Robertas Andrulionis ◽  
Ieva Švagždytė
Keyword(s):  
Inclination Angle ◽  
Water Surface ◽  
Rotation Speed ◽  
Oil Removal ◽  
Industrial Oil ◽  
Disc Rotation ◽  
Disc Rotation Speed ◽  
Analysis Of Results

Influence of grooved disc rotation speed and inclination angle of fluid from surface on amount of removed liquid, was studied in this article. Stand with possibility to change disc, rotation speed of disc and angle was designed and assembled. U and V shaped groove discs were used. Edible and industrial oil SAE 80W90 were removed from water surface and collected into the flash. Optimal disc rotation speed, which is 15 rpm and disc inclination angle 00 were determined after analysis of results. Straipsnyje išnagrinėta skirtingais griovėtais diskais nuo vandens paviršiaus surenkamo skysčio ir jame esančio vandens kiekio priklausomybė nuo griovėto disko sukimosi greičio ir polinkio kampo. Buvo suprojektuotas stendas su galimybėmis pakeisti diską, disko sukimosi greičius bei polinkio kampą. Naudotų diskų griovelių geometrija V ir U formos. Nuo vandens paviršiaus disku buvo renkamas maistinis aliejus ir tepalai 80W90 į sugraduotą kolbą. Atlikus gautų rezultatų analizę, nustatytas optimalus disko sukimosi greitis, kuris lygus 15 aps/min, o polinkio kampas lygus 0°.

A Plastic Injection Molding Process Characterization Using Experimental Design Technique: A Case Study

2012 ◽  
Author(s):  
Shaik Mohamed Mohamed Yusoff ◽  
Jafri Mohd. Rohani ◽  
Wan Harun Wan Hamid ◽  
Edly Ramly
Keyword(s):  
Regression Analysis ◽  
Injection Molding ◽  
Process Parameters ◽  
Rotation Speed ◽  
Plastic Injection Molding ◽  
Injection Molding Process ◽  
Molding Process ◽  
Significant Process ◽  
Short Shot ◽  
Plastic Injection

Kertas kerja ini mengillustrasikan applikasi reka bentuk eksperimen dalam industri pemprosesan suntikan plastik untuk salah satu komponen penyaman udara. Objektif utama reka bentuk eksperimen ini ialah untuk mengenal pasti parameter mesin suntikan plastik dan seterusnya menentukan paras optima mesin yang mempengaruhi karekteristik output, iaitu short–shot. Reka bentuk factorial penuh telah dipilih untuk kajian ini dengan mengenal pasti lima mesin parameter, iaitu backpressure, screw rotation speed, spear temperature, monifold temperature, dan holding pressure transfer. Keputusan kajian telah dapat mengenal pasti mesin parameter yang mempengaruhi karekteristik output dan mesin parameter signifikasi tersebut telah dianalisa melalui model regrasi. Kata kunci: Reka bentuk eksperimen, mesin suntikan plastik, analisa varian, analisa regrasi This paper illustrates an application of design of experimental (DOE) approach in an industrial setting for identifying the critical factors affecting a plastic injection molding process of a certain component for aircond assembly. A critical to quality (CTQ) of interest is reducing process defects, namely short–shot. A full factorial design was employed to study simultaneously the effect of five injection molding process parameters. The five process parameters are backpressure, screw rotation speed, spear temperature, manifold temperature, and holding pressure transfer. Finally, the significant process parameters influencing the short–shot defect have been found. Empirical relationship between CTQ and the significant process parameters were formulated using regression analysis. Key words: Design of experiments, injection molding, analysis of variance (ANOVA), regression analysis

scholarly journals Production and Characterization of Controlled Release Urea Using Biopolymer and Geopolymer as Coating Materials

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 400 ◽  
Author(s):  
Babar Azeem ◽  
Kuzilati KuShaari ◽  
Muhammad Naqvi ◽  
Lau Kok Keong ◽  
Mohammed Khaloofah Almesfer ◽  
...  
Keyword(s):  
Controlled Release ◽  
Fluidized Bed ◽  
Air Temperature ◽  
Process Parameters ◽  
Interactive Effect ◽  
Process Time ◽  
Nitrogen Release ◽  
Coating Materials ◽  
Spray Rate ◽  
Controlled Release Urea

Synthetic polymers-based controlled release urea (CRU) leaves non-biodegradable coating shells when applied in soil. Several alternative green materials are used to produce CRU, but most of these studies have issues pertaining to nitrogen release longevity, process viability, and the ease of application of the finished product. In this study, we utilized tapioca starch, modified by polyvinyl alcohol and citric acid, as coating material to produce controlled release coated urea granules in a rotary fluidized bed equipment. Response surface methodology is employed for studying the interactive effect of process parameters on urea release characteristics. Statistical analysis indicates that the fluidizing air temperature and spray rate are the most influential among all five process parameters studied. The optimum values of fluidizing air temperature (80 °C), spray rate (0.13 mL/s), atomizing pressure (3.98 bar), process time (110 min), and spray temperature (70 °C) were evaluated by multi-objective optimization while using genetic algorithms in MATLAB®. Urea coated by modified-starch was double coated by a geopolymer to enhance the controlled release characteristics that produced promising results with respect to the longevity of nitrogen release from the final product. This study provides leads for the design of a fluidized bed for the scaled-up production of CRU.

A Try for Improvement of Performance in Dry Barrel Finishing by Centrifugal Disc Type

2007 ◽  
Vol 329 ◽  
pp. 279-284 ◽  
Author(s):  
Koichi Kitajima ◽  
Akihiro Yamamoto ◽  
Moriyasu Izawa
Keyword(s):  
Rotation Speed ◽  
Plain Carbon Steel ◽  
Total Efficiency ◽  
Triangular Prism ◽  
Belt Grinding ◽  
Disc Rotation ◽  
Disc Rotation Speed ◽  
Speed Up ◽  
Cold Rolled ◽  
Barrel Finishing

The speed-up of the disc rotation in dry centrifugal barrel finishing is done and its influence on finishing characteristics is experimentally examined. The workpiece is a sliced cold rolled bar of plain carbon steel (S45C in JIS, HB221). It is 32mm in diameter and finished to10mm in thickness by belt grinding. The equilateral triangular prism nylon media (1010mm, A#320) is used at 20vol% in media charging ratio. The disc rotation speed is increased up to 500min-1. By speeding up the disc rotation, the finishing speed improves, but the total efficiency decreases.

Fuzzy Model for Electrostatic Fluidized Bed Coating

2014 ◽  
Author(s):  
Federica Trovalusci ◽  
Massimiliano Barletta ◽  
Oliviero Giannini
Keyword(s):  
Fluidized Bed ◽  
Process Parameters ◽  
Coating Thickness ◽  
Gas Flow ◽  
Fuzzy Model ◽  
Transformation Method ◽  
Model Parameters ◽  
Main Process ◽  
Fluidized Bed Coating ◽  
Control Procedures

The study concerns the coating process of metal substrates in an electrostatic fluidized bed (EFB). This eco-friendly process is profitably used to coat components of particularly complex shapes. Although this technology is widely spread in several industrial domains, the implementation of appropriate process control procedures is still object of investigation. A model was generated from experimental data with the aim of predicting, for any set of process parameters, the resulting coating thickness of the sample. With a design of experiment (DOE) approach, the experimental investigation, that is the base for the model, quantifies the coating thickness as a function of the main process parameters namely coating time, applied voltage, and gas flow rate fed into the fluidized bed. This study addresses the effect of the inherent uncertainties on the predicted coating thickness caused by the approximation in the model parameters. In particular, a fuzzy-logic based approach is used to describe the model uncertainties and the transformation method is used to propagate their effect on the thickness. The fuzzy results are then compared with the data produced by the experimentation leading to the evaluation of the membership level of the dataset to the uncertain model.

Optimization of Injection Process Parameters Based on Grey Theory

2013 ◽  
Vol 711 ◽  
pp. 166-172
Author(s):  
Jiang Dong Cao ◽  
Jian Bo Ding ◽  
Lei Gang Wang
Keyword(s):  
Product Development ◽  
Process Parameters ◽  
Optimal Level ◽  
Variance Analysis ◽  
Grey Theory ◽  
Grey System ◽  
Injection Process ◽  
Factors Influencing ◽  
Orthogonal Experiments ◽  
Relational Degree

Abstract. In this paper injection process for industry production is just a grey system which have problems of complex representation and discrete data. Orthogonal experiments have been designed to obtain the value of shrinkage and warp. The lower value of the two objects is better. After data obtained in experiments are dealt with by grey theory, relational degree had been calculated. With variance analysis the optimal level of the factors influencing the value of the two objects have been find out, then a optimal group of the process parameters has been obtained. Through simulation in computer, the warp is less than 0.5 mm, the shrinkage is less than 0.5%. The requirements of the product have been satisfied. In this method the factors had been considered before mould is tested comprehensively. Time and cost of product development have been decreased greatly. It is believed that the method is valuable in actual product.

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