The Effect of the Humidification Treatment of the Roving on the Quality of the Hemp/Cotton Blended Yarn

2010 ◽  
Vol 143-144 ◽  
pp. 1322-1327
Author(s):  
Zhi Li ◽  
Ya Bin Li ◽  
Hua Zhang ◽  
Xiao Ting Wang
Keyword(s):  
Blended Yarn ◽  
Spinning Process

A humidification approach was employed by using spraying mist on the roving before the back rollers of the spinning frame to improve the quality of the hemp/cotton blended yarn. The yarn performance after was investigated. The investigation showed that the evenness, hairiness, tenacity of the yarn was improved by using the humidification technique. When the humidification reached 250mL/h, the spinning process was adversely affected and quality of yarn decreased.

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.

scholarly journals Friele Model of Rotor Spun Multi-Primary-Colour-Blended Yarn

2019 ◽  
Vol 27 (5(137)) ◽  
pp. 50-59
Author(s):  
Ruihua Yang ◽  
Yaya Xu ◽  
Ruiye Han
Keyword(s):  
Industrial Production ◽  
Model Parameters ◽  
Mixing Effect ◽  
Model Parameter ◽  
Rotor Spinning ◽  
Blended Yarn ◽  
Two Component ◽  
Spinning Process ◽  
Production Flexibility ◽  
High Production

Multi-channel rotor spinning equipment can produce multi-colour mixed yarn by changing the feed speeds of three primary coloured slivers separately. The method realises the mixing of colour fibres during the spinning process, and has the characteristics of high production flexibility, simplicity and quickness. The colour mixing effect and colour blending ratio prediction are important conditions for industrial production. In this paper, two-component and three-component samples were spun with rovings of red, yellow and blue with different blending ratios. A colour model of the rotor spun multi-primary-colour-blended yarn was established based on Friele theory by determining the σ value, which is the model parameter determined by experiments. Two methods were employed to calculate the σ value to improve the accuracy of the model:1. under the condition of all wavelengths and 2. at various wavelengths. The results showed that the model parameters calculated at various wavelengths could better predict the colour of multi-channel rotor spun colour-blended yarn.

scholarly journals Investigation of the Physical Properties of Jute Blended Yarn Using a Novel Approach in Spinning Process

2016 ◽  
Vol 02 (01) ◽  
pp. 1-6 ◽  
Author(s):  
Md. Abdus Shahid ◽  
A. K. M. Mahabubuzzaman ◽  
Farid Ahmed ◽  
Ayub Ali
Keyword(s):  
Physical Properties ◽  
Blended Yarn ◽  
Novel Approach ◽  
Spinning Process

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.

Law of Metal Flow of Thin-Walled Conical Part With Variable Section During Spinning

2020 ◽  
Author(s):  
Shu Xuedao ◽  
Xia Yingxiang ◽  
Zhu Ying ◽  
Li Zixuan ◽  
Ye Bohai
Keyword(s):  
Metal Flow ◽  
Conical Part ◽  
Forming Process ◽  
Finite Element Software ◽  
Axial Tensile ◽  
Variable Section ◽  
Spinning Process ◽  
Thin Walled ◽  
Forming Defects

Abstract During the spinning process of the variable-section thin-walled conical parts, the metal flow law is relatively complicated and the flange is prone to be unstable, which resulting in wrinkling and other defects. In this paper, the variable-section conical part of superalloy GH1140 is taken as the research object. The spinning forming process is numerically simulated by using Simufact Finite Element software and the metal flow in each stage of the forming process is analyzed. The flow velocity shows an annular distribution as a whole. The metal near the center of the circle flows more slowly, and the metal far from the circular flange flows more quickly. In the direction of thickness, the velocity of metal flow decreases gradually. Under the feeding action of the roller, the metal in front of the roller is subjected to axial tensile stress, tangential and radial compressive stress, resulting in a strain state of one-way tension and two-way compression. The metal moves along the negative direction of the rotary wheel feed, resulting in the increase of the sheet wall thickness. The correctness of the model in this paper is further verified by spinning experiments. The research results provide a theoretical basis for analyzing the mechanism of forming defects and improving the quality of spinning forming of conical thin-walled parts with variable sections.

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.

Simulation of sliver blending and evaluation of blending irregularity

2021 ◽  
pp. 004051752110288
Author(s):  
Qiaoli Cao ◽  
Lili Qian ◽  
Hao Li ◽  
Chongwen Yu
Keyword(s):  
Simulation Method ◽  
Research Results ◽  
Blended Yarn ◽  
Blending Process ◽  
Fiber Components ◽  
Simulation Results ◽  
Experiment And Simulation ◽  
Good Agreement

The quality of blended yarn depends on the uniformity of the blending of the multi-component fibers in the yarn, and sliver blending is a process necessary for mixing fibers. The movement of fibers directly affects the distribution and mixing of fibers in the sliver. In this paper, the sliver blending process was simulated, and a method for the evaluation of sliver blending irregularity was proposed. The effects of passages of drawing and blending ratio on the sliver mixing uniformity were studied and verified both by experiment and simulation. The results show that the blending irregularity decreases gradually and tends to be stable with the increase of the passages of blending drawing. The more similar the blending ratio of the two components with approximately equal linear densities, the easier it is for the component fibers to mix evenly in the sliver. The simulation results are in good agreement with the measured values and previous research results. In addition, the blending irregularity of fiber components in the blended sliver can be predicted by the simulation method.

scholarly journals Establishment and Analysis of Simulation Model for Single-pass 20 Steel Spinning

2021 ◽  
Vol 2076 (1) ◽  
pp. 012068
Author(s):  
Yu Yang ◽  
Jiao Yang
Keyword(s):  
Simulation Model ◽  
Process Parameters ◽  
Computer Technology ◽  
Deformation Process ◽  
Scientific Basis ◽  
Element Simulation ◽  
Spinning Process ◽  
Cylindrical Parts ◽  
Metal Deformation

Abstract With the continuous advancement of computer technology, finite element simulation has been gradually applied to the analysis of plastic deformation of metals. If a strong spinning simulation model of 20 steel cylindrical parts can be established to effectively simulate the stress, strain and surface quality of the metal deformation process, it can provide a scientific basis for the setting of spinning process parameters, thus reducing the number of spinning process experiments to determine spinning process parameters.

Influence of yarn parameters on cotton/kenaf blended yarn characteristics

2020 ◽  
Vol 14 (4) ◽  
pp. 7622-7627
Author(s):  
S. A. S. Abdullah ◽  
N. Z. M. Zuhudi ◽  
K. D. Mohd Aris ◽  
M. N. Roslan ◽  
M. D. Isa
Keyword(s):  
Alkali Treatment ◽  
Cotton Fibers ◽  
Structural Parameter ◽  
Ring Spinning ◽  
Kenaf Fiber ◽  
Yarn Strength ◽  
Blended Yarn ◽  
Spinning Process ◽  
Kenaf Fibers ◽  
Blend Ratios

Spinning kenaf fibers into yarns is challenging due to the stiffness and lack of cohesiveness of the fibers. Alkali treatment is known to remove hemicellulose, wax, and breaks down lignin, reducing stiffness of kenaf fiber and improving its spinnability. Kenaf fibers were treated at percentages of 4% and 6% and blended with cotton fibers at blend ratios of 40:60 and 50:50 prior to a ring spinning process to produce a double ply yarn of 70 tex.  Yarn were twisted at three sets of twist. The responses were measured in terms of carding waste percentages and yarn strength. The results showed that the optimized yarn structural parameter is kenaf fiber treated at 6% and with a kenaf/cotton 40/60 blending ratio based on its tenacity and minimum carding waste. ANOVA shows that there is a good interaction effect between NaOH and kenaf/cotton ratio, and NaOH concentration and twist.

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