International Journal of Engineering Inventions
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- Điều hướng trang này:
- 4.1.7.3 Causes of Lap Licking
- 4.1.8 Preventive Action 4.1.8.1 Preventive Action for Neps Formation
| 4.1.7 Defects and Causes
Neps formation Curly cotton due to tight gauge Lap clicking 4.1.7.1 Causes of neps formation in blow room Due to following points neps formation takes place. And these nep formations strongly affect the yarn quality Because of too high or low moisture of cotton. Neps formation takes place when there is extremely fine cotton with high trash content. Reprocessing of laps and mixing of soft waste cotton, if the reprocessing, this will create bad effect of yarn quality. During reprocessing maximum neps are create which are difficult to remove in the next stage. So it is needed to avoid reprocessing of laps and soft waste cotton. Analysis on the Defects in Yarn Manufacturing Process & its Prevention in Textile Industry www.ijeijournal.com Page | 53 Fig. 11 A NEP Formations in Yarn 4.1.7.2 Causes of curly cotton Due to following points of curly cotton it should be set the parts of machine in a proper way so that following causes does not happen Grid bar is the part of blow room machine which is used for cleaning purpose. Grid bar settings are very close to the beater. Causes of curly cotton are due to hooked or bent pins in beaters. 4.1.7.3 Causes of Lap Licking Due to the following points lap clicking occurs. Lap is the output of blow room which is used for next step such as carding machine. To avoid the lap of licking we use roving ends within the lap to act as a layer separation. Soft waste cotton should not use in mixing because it will create problem in the next stage. Sticky nature of cotton, so avoid sticky cotton. 4.1.8 Preventive Action 4.1.8.1 Preventive Action for Neps Formation For avoiding neps formation it is necessary to select the cotton according to moisture content in the cotton. In both cases if moisture content is less or more, our process will become critical. As quality of our end product depends upon raw material. If cotton having more trash content then it is necessary to increase beating point. And this beating will directly affect our neps formation and neps formation will be more. Cotton mixing supervisor should take action that during mixing soft waste and process lap not to be mix with fresh mixing. This step is necessary to avoid neps formation. As neps formation affect the quality of our yarn. tải về 1.28 Mb. Chia sẻ với bạn bè của bạn:
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