Fabric cutting

All coating should be post-fabrication, cutting or drilling coated sheet or tube is unacceptable. However, coated items can be bent or formed. 

Pre-impregnated rovings, tapes, tows or fabrics, cut to the right shape and size, are laid-up by hand or machine onto a mould surface. 

Knitting/manufacturing (Socks/Garment) in which the dyed yam was knitted into fabric Cut and sew, finishing (Garment)... 

Schematic workflow of activities of a fabric-cutting department of a typical apparel manufacturing company. 

The last operation is fabric cutting. Garment pieces are cut out of the fabric lay following the pattern lines of the component parts of one or more garments on the marker, and then transported to the sewing department for assembly into a finished... 

This example shows that numerous other possible COP solutions can be generated. The COP problem becomes more difficult when the numbers of garments and sizes increase. The problem will be further complicated when the parameter of colour is also considered in the plan. In addition, labour is needed to operate the spreading and eutting machines. As the fabric cut pieces will be transported to the sewing room for garment assembly, COP needs to consider the fulfilment of the demand quantity of cut-piece from the downstream sewing room. 

Key words genetic algorithms, firzzy set theory, parallel machine scheduling, fabric cutting, apparel. 

Fabric cutting jobs belong to different production order. 

Layout of a fabric-cutting department consisting of four cutting tables with examples of fabric lays being spread. 

In a traditional fabric-cutting department, there are several key operatiorrs... 

The JIT fabric-cutting schedule can be optimized using GAs such that the overall degree of satisfaction. 

To optimize a fuzzy fabric-cutting schedule by GAs, the operation procedure begins by randomly generating an initial population of integer strings in which each string represents a job processing sequence, as shown in Fig. 7.4. Evolution... 

In the apparel industry, production orders tend to split into smaller orders with different product features in response to growing requests for product customization. In order to shorten product time-to-market, apparel manufacturers work hard in the direction of just-in-time production. In the apparel manufacturing process, the effectiveness of fabric-cutting schedule planning extensively influences downstream assembly operations, and thus, in turn, is critical to the overall system performance. However, the demand from downstream operation... 

Mok, P.Y., Kwong, C.K. and Wong, W.K., 2007. Optimisation of fault-tolerant fabric-cutting schedules using genetic algorithms and fuzzy set theory, European Journal of Operational Research, 177(3), 1876-1893. 

Wong, W.K., Kwong, C.K., Mok, P.K., Ip, W.H. and Chan, C.K., 2005. Optimization of manual fabric-cutting process in apparel manufacturing using genetic algorithms. 

In the strip test (Fig. 5.2) the strength of a 10 cm wide strip of fabric cut parallel to the warp and parallel to the weft is proposed as in DIN 53354, DIN 13934-1 and other standards. In setting the number of tests it is necessary to decide which evaluations are the most important-... 

The plumbite treated fabric cut to desired shape is heated in a closed oven to approximately 600 0 with the fabric in surface contact with either a silicate glass or porcelain It is important that the oven remain closed while the temperature is raised to about 300 C to prevent ignition of the fabric Above 300 C the oven can be opened periodically for examination of the sample The temperature of 600 C is maintained for about 1 h The maximum temperature required will vary soiaewhat depending on the siliceous substrate used Temperatures as low as 550 C with soda-lime glass and as high as 700 C with borosilicate glasses have been used with success ... 

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