Optimization of Manufacturing Parameters for Melt Spun Yarns Using Taguchi Method

2014 ◽  
Vol 556-562 ◽  
pp. 4264-4267
Author(s):  
Shu Wen Wang ◽  
Te Li Su
Keyword(s):  
Taguchi Method ◽  
Melt Spinning ◽  
Parameter Design ◽  
Controllable Factors ◽  
Melt Spun ◽  
Spun Yarns ◽  
Spinning Process ◽  
Polypropylene Melt ◽  
Manufacturing Parameters

In melt spinning process, evenness of polypropylene melt spun yarns affects the appearance, hairiness, strength and productivity of yarns, as well as product production and profits, causing rejection due to nonconformity. The research is to find optimal manufacturing parameters of melt spun yarns. Firstly, to proceed the parameter design by Taguchi method, then to select a manufacturing parameter which will affect the quality of melt spun yarns as controllable factors. Also to choose a suitable orthogonal arrays. Meanwhile, according to variation of analysis, to decide optimal manufacturing parameters of melt spun yarns and its remarkable factor. Finally, using 95% confidence interval to proof the experiment’s reliability and repeatability.

Microstructure Analysis of Melt-Spun Al3Ti Intermetallics by XRD and EXAFS

1996 ◽  
Vol 460 ◽  
Author(s):  
Jinmin Chen ◽  
W. E. Frazier ◽  
E. V. Barrera
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Melt Spinning ◽  
Composition Range ◽  
Processing Parameters ◽  
Wheel Speed ◽  
Annealing Temperatures ◽  
Melt Spun ◽  
Temperature Heat ◽  
Spinning Process

ABSTRACTIn an effort to expand the composition range over which Al3Ti is stable, various amounts of niobium were substituted for titanium and processed by melt-spinning. Several samples were annealed both at 600°C and 1000°C for 24 hours. The effects of processing parameters such as wheel speed, the amount of niobium, and annealing temperatures on the structure were investigated by XRD and EXAFS. XRD showed that for all the samples the only structure present was DO22-The DO22 structure was stable even after the high temperature heat treatments. By means of EXAFS, niobium atoms were observed to occupy titanium sites in the DO22 structure. Furthermore, in the unannealed samples, increasing wheel speed of the melt spinning process or the niobium concentration tended to distort the crystal structure. It was observed that Ti EXAFS had different results from the Nb EXAFS beyond their occupying similar sites, which suggested there may exist some composition zones, i.e. rich Nb zone or rich Ti zones, although the structures present were still DO22. The samples were found to experience different distortions as a function of annealing temperatures.

scholarly journals The Effect of External Magnetic Field on Microstructure and Magnetic Properties of Melt-Spun Nd-Fe-B/Fe-Co Nanocomposite Ribbons

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Xuan Truong Nguyen ◽  
Hong Ky Vu ◽  
Hung Manh Do ◽  
Van Khanh Nguyen ◽  
Van Vuong Nguyen
Keyword(s):  
Magnetic Field ◽  
Grain Size ◽  
High Performance ◽  
Melt Spinning ◽  
Nominal Composition ◽  
Energy Product ◽  
Melt Spun ◽  
Spinning Process ◽  
Reduction Effect ◽  
Microstructure And Magnetic Properties

The ribbons Nd2Fe14B/Fe-Co were prepared with the nominal composition Nd16Fe76B8/40% wt. Fe65Co35by the conventional and the developed magnetic field-assisted melt-spinning (MFMS) techniques. Both ribbons are nanocomposites with the smooth single-phase-like magnetization loops. The 0.32 T magnetic field perpendicular to the wheel surface and assisting the melt-spinning process reduces the grain size inside the ribbon, increases the texture of the ribbon, improves the exchange coupling, and, in sequence, increases the energy product(BH)maxof the isotropic powdered samples of MFMS ribbon in ~9% by comparison with that of the ribbon melt-spun conventionally. The grain size reduction effect caused by the assisted magnetic field has also been described quantitatively. The MFMS technique seems to be promising for producing high-performance nanocomposite ribbons.

Influence of Angle of Inclination of the Crucible on Puddle Formation and Ribbon Thickness during Planar Flow Melt Spinning Process

2018 ◽  
Vol 1 (1) ◽  
pp. 279-285 ◽  
Author(s):  
Sowjanya Madireddi
Keyword(s):  
Melt Spinning ◽  
Ribbon Thickness ◽  
Wheel Surface ◽  
Planar Flow ◽  
Ideal Position ◽  
Quality Product ◽  
Spinning Process ◽  
Transformer Core ◽  
The Ideal

Planar flow melt spinning process is widely used to manufacture amorphous ribbons for transformer core applications. The position of the crucible above cooling wheel for melt ejection in the realistic production conditions is crucial to producing the higher quality product. The quality of the product depends on the thickness and defect-free state of the ribbon. Puddle formation plays a significant role in the quality of the ribbon. As the experimental investigation is expensive and time consuming a numerical model is used to investigate the effect of clockwise and counter-clockwise inclination of the crucible on puddle formation and ribbon thickness. The thickness increases by 62.8 % and 111.5% with an augment in inclination angle from 0o to 5.4o in counter-clockwise and clockwise directions respectively. Limiting angle of inclination to avoid non-contact zone or cavity in the puddle at the nozzle wall is around 2o to 3o to obtain a higher quality ribbon. This limit can increase up to 3o to 4o for higher wheel speeds. The ideal position of the crucible is perpendicular to the wheel surface. Otherwise, the limiting angle of inclination to produce higher quality ribbon is, counter-clockwise with an optimum inclination of not more than 2 degrees.

Investigation of Movable Balloon Controller System on a Ring Spinning Frame

2011 ◽  
Vol 175-176 ◽  
pp. 474-479
Author(s):  
Ju Sheng Qiu ◽  
Zhi Li Zhong ◽  
Huan Guo ◽  
Xun Gai Wang
Keyword(s):  
Displacement Sensor ◽  
Step Motor ◽  
Ring Spinning ◽  
Yarn Tension ◽  
Spun Yarns ◽  
The Status ◽  
Spinning Process ◽  
Linear Module ◽  
High Power Consumption

Compared to other spinning system, the ring spinning process has been used to produce higher quality yarns, but with a much lower spinning efficiency, resulted from the relatively high spinning tension that leads to increased yarn breakage rates and makes high power consumption. Thus, depressing yarn tension is essential to change the status. In this paper, we design a movable balloon controller system to reduce yarn tension. The system is automatic, composed of powder switch, touch screen, PLC (Programmable Logic Controller), pulling-thread displacement sensor, controller of step motor, step motor and linear module. PLC, the core of the system, controls the position of the balloon controller by a series of programs. Then yarn tension was tested while spinning with movable balloon control ring, fixed balloon control ring and no balloon control ring, respectively. The result shows that the yarn tension can be depressed indeed by equipping this movable balloon controller system to some extent. Additionally, we find that the number of hairiness of ring spun yarns with this system can be reduced to some extent, while yarn tensile properties are not as sensitive to be worse. It is significant to cut down ends-down rate, improve the quality of ring spun yarns, the spinning efficiency as well as the energy efficiency of ring spinning.

Taguchi Optimization to Determine Optimal Denier of the Polyester Fibre

2014 ◽  
Vol 472 ◽  
pp. 688-692
Author(s):  
Shu Wen Wang ◽  
Te Li Su
Keyword(s):  
Taguchi Method ◽  
Melt Spinning ◽  
Signal To Noise Ratio ◽  
Polyester Fibre ◽  
Synthetic Fiber ◽  
Signal To Noise ◽  
Taguchi Optimization ◽  
Spinning Process ◽  
Quality Deviation ◽  
Significant Factors

Polyester fibre is the synthetic fiber made with man-made fibers. Its surface is smooth with the texture of fine linen. It has good flexibility and durability and is the best non-iron fibres. In order to promote the accuracy and reduce the quality deviation of melt spinning, the Taguchi method was adopted in the melt spinning process. The aim of the research is to enhance the optimization of the melt spinning process using the material polyester. First, the Taguchi method is applied to establish the design of experiment. An analysis of variance will be done to arrive at the significant factors that influence the melt spinning quality the most. Lastly, confirmation experiments verified the reproducibility of this experiment. Confirmed by the experiments, results showed that the obtained SN ratios were greater than the signal-to-noise ratio of nine orthogonal array experiments and this means the experiment is reliable.

Structure and Size Distribution of Powders Produced from Melt-Spun Fe-Si-B Ribbons

2021 ◽  
Vol 876 ◽  
pp. 25-30
Author(s):  
Rosa M. Aranda Louvier ◽  
Raquel Astacio Lopez ◽  
Fátima Ternero Fernández ◽  
Petr Urban ◽  
Francisco G. Cuevas
Keyword(s):  
Size Distribution ◽  
Melt Spinning ◽  
Nanocrystalline Structure ◽  
Amorphous Structure ◽  
X Ray Diffraction ◽  
Homogenization Time ◽  
Melt Spun ◽  
Spinning Process ◽  
Amorphous Character ◽  
Ejection Pressure

This work studies the production of melt spun Fe78Si9B13 ribbons with amorphous or nanocrystalline structure. The main objective is the preservation of the amorphous structure after obtaining powders by mechanical milling of the ribbons, as well as the study of the influence of the milling conditions on the size distribution and structure of the obtained powders. In order to obtain high quality amorphous ribbons, the wheel rotation speed, crucible-wheel distance, melt homogenization time, ejection pressure and the ejection temperature were optimized in the melt spinning process. Different mills were used for powder production, studying the size distribution, efficiency, and preservation of the amorphous character as a function of the milling time. Ribbons and powders were characterized by X-ray diffraction (XRD) and electron microscopy (SEM and TEM); laser diffraction was used for powder granulometry.

Amorphous - Nanocrystalline Melt Spun Al-Si-Ni Based Alloys Modified with Cu and Zr

2013 ◽  
Vol 58 (2) ◽  
pp. 419-423 ◽  
Author(s):  
A. Kukuła-Kurzyniec ◽  
J. Dutkiewicz ◽  
P. Ochin ◽  
L. Perrière ◽  
P. Dłuzewski ◽  
...  
Keyword(s):  
Solid Solution ◽  
Melt Spinning ◽  
Amorphous Matrix ◽  
Amorphous Structure ◽  
Glass Forming Ability ◽  
Dsc Studies ◽  
Glass Forming ◽  
Melt Spun ◽  
Spinning Process ◽  
The Mean

In the present paper glass forming ability and structure of Al-Si-Ni based alloys were investigated. Three alloys starting from the ternary Al78Si12Ni10 [alloy 1], Al75Si12Ni8Zr5 [alloy 2] and Al73Si5Ni7Cu8Zr7 [alloy 3] were subjected to melt spinning process. The mean thickness of the obtained ribbons amounted between 25 and 40 μm. XRD and DSC studies showed predominantly amorphous structure of the ribbons. STEM and HRTEM methods confirmed participation of crystalline phase identified mainly as Al solid solution with the grain size near 10 nm. The mean microhardness [0.1N] of the ribbons was measured for alloys 1 - 3 respectively: 457 HV, 369 HV and 536 HV. The high value of hardness can be related to the presence of α-Al dispersoids in the amorphous matrix.

Crystallization Behavior and Curie Temperature Properties of Al Doped Nd-Fe-B Based Nanocomposite Permanent Magnet

2012 ◽  
Vol 585 ◽  
pp. 149-153
Author(s):  
Sudipta Halder ◽  
A.K. Panda ◽  
Amitava Mitra ◽  
Amitava Basu Mallick
Keyword(s):  
Curie Temperature ◽  
Permanent Magnet ◽  
Crystallization Temperature ◽  
Melt Spinning ◽  
Annealing Temperature ◽  
Vacuum Arc ◽  
Scanning Calorimetry ◽  
Melt Spun ◽  
Vacuum Arc Furnace ◽  
Spinning Process

The work is primarily concerned with the development of nanocrystalline Nd-Fe-B, based permanent magnet with high Curie temperature. An alloy of composition Fe81Nd7Al2B10 has been prepared using vacuum arc furnace and subjected to using Melt-Spinning process for preparation of amorphous flakes. Differential scanning calorimetry (DSC) has been performed to determine the crystallization temperature and activation energy of the melt spun amorphous ribbons. Subsequently the melt spun ribbon was subjected to annealing at below and above the crystallization temperatures to identify effect of Al on the Curie temperature. It was noteworthy for the effect of alloying Al above crystallization temperature. The Curie temperature increases to by almost 1.3 times with increase in annealing temperature.

scholarly journals THE ESTIMATION OF BIREFRINGENCE IN POLYPROPYLENE MELT SPINNING PROCESS

1973 ◽  
Vol 29 (5) ◽  
pp. T205-T210 ◽  
Author(s):  
Jiro Shimizu ◽  
Kozo Shimazaki
Keyword(s):  
Melt Spinning ◽  
Spinning Process ◽  
Polypropylene Melt
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