Comparison of the Cost Performance between Pure Cashmere Siro-Spun Yarn and Pure Rabbit Hair Ring-Spun Yarn

2011 ◽  
Vol 331 ◽  
pp. 40-43
Author(s):  
Yue Ling Liu ◽  
Bu Kun Sun
Keyword(s):  
Market Price ◽  
Scientific Basis ◽  
Raw Material ◽  
Performance Ratio ◽  
Cost Performance ◽  
Spun Yarn ◽  
Yarn Properties ◽  
Ring Spun Yarn ◽  
Yarn Hairiness ◽  
The Cost

This paper systematically analysied and measured the main properties of the pure cashmere siro-spun yarn and pure rabbit hair ring-spun yarn, including the yarn evenness, thin and thick , neps, raw material nature, yarn strength, yarn hairiness, twist level, wearing resistance and etc. And the market price of yarn was also investigated. The model of the cost performance ratio was established to analyse the yarn properties scientifically. The results indicated that the pure rabbit hair yarn is better than the pure cashmere yarn. It provided the guidance suggestions and scientific basis for the manufacturers to improve the performance and reduce the cost price of the yarn.

Comparative study of ring yarn properties spun with static and rotary grooved contact surfaces

2017 ◽  
Vol 88 (16) ◽  
pp. 1812-1823 ◽  
Author(s):  
Hao Yu ◽  
Keshuai Liu ◽  
Chen Jun ◽  
Chiyu Fu ◽  
Zhigang Xia ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Contact Surface ◽  
Surface Friction ◽  
Significant Deterioration ◽  
Spun Yarn ◽  
Yarn Properties ◽  
Static Contact ◽  
Ring Spun Yarn ◽  
Grooved Surface ◽  
Yarn Hairiness

Spinning with a static contact surface is an energy-saving method to reduce spun yarn hairiness; however, the spun yarn irregularity and tensile properties are deteriorated. To prohibit the deteriorations, this paper introduces a rotary grooved surface contacting ring spinning strand within the yarn formation zone. In theory, the modeling analysis of spinning with contact surface is conducted to reveal the prohibition mechanism of yarn irregularity and tensile property deteriorations for a rotary grooved surface. Theoretical analysis results indicated that groove-yarn surface friction could wrap the concentrated hairs onto yarn stem while block inflowing twists to the spinning strangle zone; the rotary grooved surface could reduce twist blockage and hair wrapping concentrations to better the situation after a comparison with the static grooved surface. Then, two kinds of specially-designed grooved cylinders (one was rotatable while the other was static) were used to validate the theoretical analysis. The experimental results showed that, unlike the static grooved cylinder which significantly deteriorated the original yarn unevenness CVm, the rotary achieved significant hairiness reduction without any significant deterioration of other yarn properties. This might be due to the decreased friction and twist propagation for the rotary grooved cylinder contacting the spinning strand. In this case, spinning with a rotary grooved cylinder was preferably applied in the first step to control ring spun yarn hairiness.

A new method of yarn hairiness reduction by air suction during carding

2012 ◽  
Vol 82 (20) ◽  
pp. 2128-2136 ◽  
Author(s):  
Majid Mirzaei ◽  
Ali Akbar Gharehaghaji ◽  
Mohammad Zarrebini
Keyword(s):  
New Method ◽  
Short Fibers ◽  
Suction System ◽  
Elongation At Break ◽  
Yarn Quality ◽  
Spun Yarn ◽  
Yarn Properties ◽  
Ring Spun Yarn ◽  
Yarn Hairiness ◽  
Comparison Of The Results

Yarn hairiness has remained an issue of enormous interest in the field of yarn spinning research, since it directly affects yarn quality. In this work, a new method for the reduction of yarn hairiness is presented by attaching a simple effective air suction system to the web detaching zone of a conventional carding machine immediately behind crushing rollers. The slivers produced were almost free from dust or short loose fibers. Yarn properties such as hairiness, tenacity, elongation at break and evenness were evaluated. The ring-spun yarn that was produced was called Vacuum Cleaned Carded yarn or VCC yarn, due to the removal of the short fibers by air suction. The properties of VCC yarns were compared with those of conventionally produced reference yarn sample. Comparison of the results showed that the hairiness of optimum VCC yarn decreases by approximately 20%, while its tenacity, elongation at break and evenness were significantly improved. It was also found that the VCC yarn exhibited better spinning stability and was more environmentally friendly than the reference yarn.

scholarly journals Roughing Milling with Ceramic Tools in Comparison with Sintered Carbide on Nickel-Based Alloys

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 734
Author(s):  
Pablo Fernández-Lucio ◽  
Octavio Pereira Neto ◽  
Gaizka Gómez-Escudero ◽  
Francisco Javier Amigo Fuertes ◽  
Asier Fernández Valdivielso ◽  
...  
Keyword(s):  
Cutting Speed ◽  
High Volume ◽  
Cemented Carbide ◽  
Performance Ratio ◽  
Cost Performance ◽  
Ceramic Tools ◽  
The Cost ◽  
Engine Components ◽  
Coated Carbide ◽  
Milling Tools

Productivity in the manufacture of aircrafts components, especially engine components, must increase along with more sustainable conditions. Regarding machining, a solution is proposed to increase the cutting speed, but engines are made with very difficult-to-cut alloys. In this work, a comparison between two cutting tool materials, namely (a) cemented carbide and (b) SiAlON ceramics, for milling rough operations in Inconel® 718 in aged condition was carried out. Furthermore, both the influence of coatings in cemented carbide milling tools and the cutting speed in the ceramic tools were analysed. All tools were tested until the end of their useful life. The cost performance ratio was used to compare the productivity of the tested tools. Despite the results showing higher durability of the coated carbide tool, the ceramic tools presented a better behavior in terms of productivity at higher speed. Therefore, ceramic tools should be used for higher productivity demands, while coated carbide tools for low speed-high volume material removal.

scholarly journals Open-End Yarn Properties Prediction Using HVI Fibre Properties and Process Parameters

2017 ◽  
Vol 17 (1) ◽  
pp. 6-11 ◽  
Author(s):  
Hanen Ghanmi ◽  
Adel Ghith ◽  
Tarek Benameur
Keyword(s):  
Response Surface ◽  
Process Parameters ◽  
Processing Parameters ◽  
Raw Material ◽  
Spun Yarn ◽  
Yarn Properties ◽  
Spun Yarns ◽  
Yarn Count ◽  
Input Variables ◽  
Rotor Spun Yarn

AbstractThis article provides three models to predict rotor spun yarn characteristics which are breaking strength, breaking elongation and unevenness. These models used noncorrelated raw material characteristics and some processing parameters. For this purpose, five different cotton blends were processed into rotor spun yarns having different metric numbers (Nm10, Nm15, Nm18, Nm22, Nm30 and Nm37). Each count was spun at different twist levels. Response surface method was used to estimate yarn quality characteristics and to study variable effects on these characteristics. In this study, predicting models are given by the analysis of response surface after many iterations in which nonsignificant terms are excluded for more accuracy and precision. It was shown that yarn count, twist and sliver properties had considerable effects on the open-end rotor spun yarn properties. This study can help industrial application since it allows a quality management-prediction based on input variables such as fibre characteristics and process parameters.

Reducing yarn hairiness in ring spinning by an agent-aided system

2019 ◽  
Vol 89 (21-22) ◽  
pp. 4438-4451 ◽  
Author(s):  
Peiying Li ◽  
Mingrui Guo ◽  
Fengxin Sun ◽  
Weidong Gao
Keyword(s):  
Textile Industry ◽  
Speed Ratio ◽  
Rotating Speed ◽  
Comprehensive Properties ◽  
Spun Yarn ◽  
Spun Yarns ◽  
Ring Spun Yarn ◽  
Yarn Hairiness ◽  
Yarn Tenacity

An agent-aided system (AAS) for improving comprehensive properties of ring spun yarns with the aid of viscosity and surface tension of the agent is reported in this paper. The mechanism of the humidification and friction process of the AAS was investigated, and related experiments were also carried out to verify the mechanism of analysis. The results confirm that the AAS can attach the fiber ends protruding out of a yarn body on the yarn surface and assist in twisting the fiber ends back into the interior of the yarn body, resulting in a significant reduction of the modified ring spun yarn hairiness. Moreover, the yarn hairiness is prominently reduced after the winding process. The experimental results also show that a speed ratio of 1.3 between the rotating speed of the cylinder and the output speed of the yarn leads to the greatest extent of harmful hairiness reduction (34%), which also corresponds to optimal modified yarn tenacity. Meanwhile, the modified ring spun yarns show a tight and smooth appearance, and the yarn evenness has no deterioration. In addition, the AAS is applicable to both cotton and viscose yarns with different yarn counts. Therefore, the AAS can potentially be used to reduce yarn hairiness for ring spun yarns and enhance the quality of ring spun yarns in the textile industry.

Aspects of Improving the Cost-Performance Ratio for the Manufacturing of Small-Size Cast Parts

2010 ◽  
Vol 43 (17) ◽  
pp. 349-354
Author(s):  
Cristian Deac ◽  
Melania Tera ◽  
Cristina Biris ◽  
Marius Bibu ◽  
Valentin Oleksik
Keyword(s):  
Performance Ratio ◽  
Cost Performance ◽  
The Cost ◽  
Cast Parts

scholarly journals Key Parameters in the Manufacture of SiC-Based Composite Materials by Reactive Melt Infiltration

2019 ◽  
Author(s):  
Mario Caccia ◽  
Javier Narciso
Keyword(s):  
Composite Materials ◽  
Dwell Time ◽  
Performance Ratio ◽  
Cost Performance ◽  
Vacuum Atmosphere ◽  
Protection Systems ◽  
Melt Infiltration ◽  
The Cost ◽  
Reactive Melt Infiltration ◽  
Reactive Melt

The manufacture of SiC-based composites is quite widespread, and currently different methods are employed for to produce them. The most efficient method, taking into account the cost/performance ratio, is reactive melt infiltration. It consists in infiltrating liquid silicon into a porous preform that must contain carbon, so that SiC is produced during infiltration. This chemical reaction is, in fact, the driving force of the process. In the present work, the synthesis of two SiC-based composite materials with very different applications and microstructures has been studied and optimized. In both cases, materials have been obtained with suitable properties for the selected applications. One of the materials studied is SiCp/Si for protection systems such as armor jackets, and the other one is Cf/SiC for use in braking systems. For the optimization, the dwell time and the atmosphere (Ar or primary vacuum) were used as variables. It has been found that in both preforms the optimum conditions are 1 hour dwell time and a vacuum atmosphere at 1450 °C. The effect of these parameters on microstructure and infiltration kinetics are discussed.

scholarly journals Assessment of the Usefulness of Observation and Tracking Heads of the Long-Range for the Stratospheric Aerostat Recognition System

2018 ◽  
Vol 9 (4) ◽  
pp. 163-176
Author(s):  
Paweł DOBRZYŃSKI ◽  
Mariusz KRAWCZAK ◽  
Stanisław LIPSKI ◽  
Bogdan MACHOWSKI
Keyword(s):  
Long Range ◽  
Armed Forces ◽  
Recognition System ◽  
Performance Ratio ◽  
Cost Performance ◽  
Technical Parameters ◽  
Intelligence Collection ◽  
Operational Capabilities ◽  
The Cost ◽  
Production And Operation

The paper presents the problems of applications of stratospheric systems to increase the tactical and reconnaissance capabilities of the Polish Armed Forces. The paper contains the results from examples of simulations which were designed to determine the cost/performance ratio of the production and operation of aerostats with strictly identified technical parameters in the context of their operational capabilities. It also describes the principles of operation of aerostats for the support of intelligence collection and the limitations imposed on aerostats by the specificity of tropospheric and stratospheric regions.

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