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Lecturer(s)
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Jirásková Petra, Ing. Ph.D.
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Moučková Eva, Ing. Ph.D.
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Course content
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Courses: 1. Introduction to Spinning - a repeat of the fundamental terms and parameters of spinning technology, characteristics of basic spinning products and semi-products. Basic spinning processes - fibre opening, attenuation, consolidation. 2. Fiber materials processed in the spinning mills. 3. The basic technological processes of yarn production. Comparison of yarn properties in terms of way of production. 4. Mass irregularity of longitudinal fibrous product - basic terms. Influence of mass irregularity to textile properties. Basic principles of ensuring of mass evenness in technology of spinning. 5. - 6. Preparation for spinning - opening, cleaning, blending. Current trends in the field of blowing rooms. 7. Carding on flat and roller carding machine. Trends in the concept of carding machines. Influence of carding on the properties of the resulting fibrous product. 8. Drawing. Draft analysis. Conception of drafting arrangements in terms of technological level of yarn production Influence of the drafting process on the properties of the resulting sliver and relationship to the properties of spun yarn. 9. The importance of preparation for combing and combing. Technology of cotton and wool combing. Influential parameters of combing in terms of top properties as well as properties of the resulting yarn. 10. Sliver preparation by converters. Formation of the top on the stretch-breaking and cutting converters. Possibilities of influence of properties of resulting top. 11. Strengthening by twisting - true twist, false twists. Twist structure and roving properties in dependance on consolidation system. Roving on the flyer frame, trends in development of flyer frame. Roving assortments. 12. Spinning on the ring spinning frame. Properties of ring yarn in dependence on parameters of ring spinning system. Compact spinning. Comparison of properties of ring and compact spun yarn. Trends in the ring spinning sections. 13. Spinning on rotor spinning machine. Structure and properties of rotor yarn in dependence on technological condition of rotor spinning. High-speed rotor spinning and influence on yarn properties. Trends in development of rotor spinning machine. 14. Non-conventional methods of spinning - basic division and principles. Influence of yarn forming technology on selected yarn properties. Technology of twisting and properties of twisted yarn. Trends in yarn twisting. Practices: 1. Repeat the basic parameters of spinning technology. 2. - 3. Calculation in spining technology. 4. Calculation of selected parameters of mass irregularity of sliver, roving and yarn. 5. - 6. Excursion to the spinning mill. 7. - 8. Spinning plan. Project - the analysis of presented yarn, making the technological method and spining plan for production of this yarn. 9. Relevance of carding. Practical demonstration of carding machine. Trends in carding development. 10. Attenuation of fibres product on the draw-frame. Demonstration of the draw-frame. Principal of change of resulting sliver fineness. Control test of knowledge. 11. Preparation for combing, combing - video demonstration. Roving. Selecting the number of turns of roving for the optimum roving characteristics. 12. Influence of the ring spinning frame adjustment on properties of yarn. Demonstration of the ring spinning frame - practical exhibition + video. 13. Influence of the rotor spinning machine adjustment on properties of rotor yarn. Demonstration of the rotor spinning machine - practical exhibition + video. Comparison of properties of ring and rotor spun yarns. 14. Defence of the project. The total evaluation, credit.
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Learning activities and teaching methods
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Monological explanation (lecture, presentation,briefing), Dialogue metods(conversation,discussion,brainstorming), Self-study (text study, reading, problematic tasks, practical tasks, experiments, research, written assignments), Demonstration, Project teaching, Laboratory work
- Class attendance
- 56 hours per semester
- Presentation preparation (report)
- 10 hours per semester
- Fieldtrips
- 8 hours per semester
- Preparation for credit
- 5 hours per semester
- Preparation for exam
- 40 hours per semester
- Home preparation for classes
- 28 hours per semester
- Preparation for formative assessments
- 5 hours per semester
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Learning outcomes
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The course follows the basic subject Textile Technology I. In this course, students will improve knowledge of the yarn manufacturing. There are discussed each technological stage of the yarn (opening, cleaning, blending, carding, doubling and drawing, combing, converter technology, roving, ring spinning, rotor spinning, unconventional methods of yarn production, twisting) with respect to the processed material. It is analyzed the impact of individual operations on the properties of both the final product, so the final yarn.
Student gains a summary of technology of yarn manufacturing, purposes of individual spinning processes, principle of used machinery. Student is able to do basic spining calculations.
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Prerequisites
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Basic knowledge of mathematics and mechanics, knowledge from subject: Textile technology I.
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Assessment methods and criteria
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Combined examination, Student's performance analysis
Direct teaching: Credit: Active participation in practices and lectures, successful passing the test of knowledge during the semester, elaboration and defense of the project. Exam: oral Lectures are compulsory. Online teaching: Credit: submission of all assigned tasks (and, if required, corrections of tasks) within self-study for exercises, submission of assigned and correctly prepared semester work by May 28, 2021. After May 28, 2021 these works will not be accepted and the student must register the subject next year. Exam: oral
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Recommended literature
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http://andar.co.nz/.
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http://www.befama.com.pl.
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http://www.muratec-vortex.com/.
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http://www.nsc-schlumberger.com/.
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http://www.schlafhorst.de/en/schlafhorst/.
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http://www.truetzschler.com.
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LAWRENCE, C. A. Fundamentals of spun yarn technology. Boca Raton: CRC Press LLC, 2003. ISBN 1-56676-821-7.
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LORD, P., R. Handbook of yarn production. Technology and Science and Economics.. The Textile Institute. Woodhead Publishing Limited Cambridge. England, 2003. ISBN 9781855736962.
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LORD, P., R. Spinning. Woodhead publishing Limited Cambridge. England, 2004. ISBN 9781855739772.
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URSÍNY, P. Předení I., Skriptum TUL, Liberec 2006.
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URSÍNY, P. Předení II., skriptum TU Liberec. Liberec, 2009.
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URSÍNY, P. Spřádání bavlnářským způsobem I., Skriptum TUL, Liberec 1988.
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URSÍNY, P. Spřádání bavlnářským způsobem II., Skriptum TUL, Liberec 1988.
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URSÍNY, P. Spřádání vlnařským způsobem, Skriptum TUL. 1. vydání.. Liberec: Vysoká škola strojní a textilní v Liberci, 1987.
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Vaverka, J., Machuta, K., Rybníkář, J. Teorie a praxe předení ve vlnařském průmyslu, česaná příze.. SNTL Praha, 1990.
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