Postgraduate Diploma in Textile Technology (Course Terminated)
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- item: Thesis-AbstractApplication of pull system concept for garment production(2014-08-01) Ariyapperuma, AADPThis Study presents the overview of the full system and its implementation in real production floor. Here discuss the practical obstacles of real implementation and the impact on the organization instead of general observations and exact theory explanations. Pull system is more on planning in advance lo get ready the input item in the pipe line with the lime frame set in advance , it is also related to get the item just in time when it's production needed. The concept in pull system is work with minimum work in progress. The biggest the VV1P, cash How will tight down, the business will collapse for that company with limited fund. For those company have plenty of fund, they will be loosen out due low interest charge on those WIP which the money already paid but still in the process (buyer only pay after goods shipped out from factory). At the end of the study, it clearly shows not only the significant saving due to controlling the WIP but also the improvement of quality and speed o f the process.
- item: Thesis-AbstractA national norm for the count variation of yarn produced in Sri Lanka(2014-07-04) Wanniarachchi, CThis project is aimed at establishing a National norm for the count variation of yarns produced in Sri Lankan mills. Owing to , ( a ) its simplicity (b) its ease of understanding by most mill personnel ( c ) the possibility of making some international comparisons on National norms and (d) the ease by which data can be collected , the Percentage Mean Range CPMR) method of measuring count variation has been used in this project . The results of this project have indicated that the average count variation of Sri Lankan spun carded cotton yarns are very much greater than ( worse than ) the world average value given under USTER STATISTICS 1982.
- item: Thesis-AbstractPerformance of polynosic/cotton blended yarn in the process of weaving(2014-07-04) Fernando, M.P.L..Junlon ia a polynosic fibre developed recently and polynosic cotton blends were ruite common "by 1980s.For the first time in Pugoda Kills polynosic/cotton yorn was produced in 19C3. The counts produced wore 45s and 50s and the yorn produced use mainly for the local market.The blending ratio was 65% cotton to 35% polynosic. With the blended yarn, fabric with the following consti-uction was produced in six looms. Warp count of yorn 45s Weft Count of yarn 45s Total no, of warp aids 3712 Picks per inch 64 Reed Count 88s Reed width 41.8 inches Reave Plain And were drawn through two heald frames. The objective 01 the project is to study the performance of polynosic/Cotton blended yarn in the process of weaving and determine the optimum size percentage to be used in order to achieve maximum weaving efficiency in the loom shed under normal working conditions.
- item: Thesis-AbstractThe Shrinkage behaviour of the interlock fabrics before and after washing(2014-07-04) Somapala, HRThis is a study of the shrinkage behavior of the interlock fabrics before and after washing,, The study is Limited to inter1ock knitted goods made from two varieties of yarns , namely 100% cotton and 65/35 polyester cotton blend., The study has been done for various loop lengths by changing the dial heights , The findings of this study suggest that the distortion is 1ess for the b1ended fabric with a dial height of 18 Studies made on the investigation of shrinkage behaviour of the interlock fabrics are very few, Therefore this project work could serve as a starting point for further investigation
- item: Thesis-AbstractControl of loop length in the production of plain knit fabrics(2014-07-04) Dayaratne, KAGThe important results obtained by previous workers , who were interested in the construction of plain knitted fabrics, have been critically analysed. Several fabric samples with different loop lengths were examined so as to obtain further information and some relationships have been observed from the experimental values. An attempt to disaprove some misconceptions , about w/cm and g/m of plain knit fabrics has been made. Finally a suggestion , helpful for further development of the project , has been brought forward.
- item:Economising in the printing department at Thulhiriya textile mill(3/29/2011) Tennakoon, AAKThe object of printing on textiles is to attract attention of consumers. The main theme of printing is localizing of various textures and colours on whit e or coloured ground of textile goods. There are several areas considered where minimizing of cost in printing could be per formed, under the following headings:- Saving of thermal energy, saving of water consumption in wet processes, increase in production speeds, damage control ,choice of dyes, selection of design & colour ways, inventory control, control of colours and chemicals in printing ,replacing costlier chemicals where ever possible, use of ingredients to improve their colour yield. Many of these areas, where cost reduction in printing that could be achieved at Thulhiriya Textile mill, have been dealt with in conclusion.
- item: Thesis-AbstractControl of yarn tension in the production of plain knit fabrics(3/29/2011) Perera, KA Eason, PThis is a study of the influence of yarn tension in the production of plain knit fabrics. The fabric samples in this study were produced in a leading knitting mill "Cyntex Knitters" at Eakala and all the tests were carried out in the textile laboratories at the University of Moratuwa, under controlled atmospheric conditions. The fabric samples produced on one machine may include some errors but will include in this study. This project work could also serve as a starting point for further investigations of the static charge buildup during weft knitting process and also of the lubrication of knitting yarns.
- item: Thesis-AbstractCost reduction in the processing department at Pugoda Textile Mill(3/29/2011) Gauthamadasa, KThis project has been undertaken to review and study the existing textile finishing process in the Processing Department of the pugoda Textile Mill, and to Propose cost reductive modifications a or new methods of practical importance. The suggestion made here are practicable under the existing set up of processing machinery ,While maintaining and ever . improving the present quality stranded conclude that there are large number of possibilities Of reducing cost by process modification and new methods
- item: Thesis-AbstractNational norms for twist, strength and count variations of yarn produced in Sri Lanka(3/29/2011) Induruwa, IPVariation in' any chosen quality characteristic is an ever present phenomenon. Twist and Count variation in a yarn can have considerable effect on the appearance of the finished fabric, whether woven or knitted. The variability in the strength of a yarn is important in fabric formation. Variation in strength is related to variation of weight per unit length. In this project, an attempt has been made to establish National Norms for Twist and Strength Variation of Cotton Yarn produced in Sri Lanka. The short-term variability of twist is determined very largely by the variation in weight per unit length. Therefore, an attempt has also been made to establish a National Norm for count variation as well. The coefficient of variation which gives a clear picture of variation as a fraction of the mean of all observations is used in this project for the analysis of results. The upper limits for Twist, Breaking Strength (single strand) and Count Variations were determined according to Indian Standard : 397 (Part III) - 1930. The results of this project have indicated that the upper limits for National Norms for Twist, Breaking Strength and Count Variations are 1 , 15 and 5 respectively.
- item:Influence of spinning parameters on yarn quality(3/29/2011) Liyanapatabandi, D; Liyanapatabandi, DSpinning, Weaving and Processing defects individuaJ1y or collectively cause faults in fabric. Yarn unevenness caused in the process o f spinning maybe due to either long or short term variations. In this project; types of short tern variations that could occurring ring spinning, their causes, methods of over coming these defects and measurement of such defects have been discussed. Due to practical difficulties in, doing changes in the process line this exercise was limited to the analysis of the effect of only certain spinning parameters on yarn quality. The results of this project have indicated that the normal. Pressure Of 10 kgs’ on front roller and 3.5mn distance clips produce the best results for 30S warp yarn.
- item: Thesis-AbstractInvestigation of causes and suggested remedies of hosiery faults(3/29/2011) Rathnayake, N; Rathnayake, NDefects occurring at knitting, dyeing, linking, boarding, cutting and sewing individually or collectively give rice to faults in hosiery which are detected by the naked eye apart from the undetectable winding faults and yarn faults. In this study these faults have been considered in eight different classes and given in tabulated form. Due to practical difficulties such as interruption to production flow and difficulties in introducing new methods, this study has been limited to a few suggestions only. This work could be used for a more detailed study in faults in hosiery including shrinkage after dyeing of stretched nylon and acrylic for hosiery knitted fabrics
- item: Thesis-AbstractSuggestions to upgrade operator performance while reducing cost by introducing new payment scheme(3/29/2011) Jayalath, KBKThis study is mainly based on the performance of the operators who work in the double cylinder .knitting department. by the help of method study and work measurement the following improvements have been achieved Achievements 1) payment scheme to upgrade operator performance 2 ) installation of new methods. 3) cost reduction This study was Carried out under two limitations 1 without changing machines to new machine 2 under prevailing circumstances This project report would also serve for further study of the situations where group of operatives are working under restricted work.