Assembly sewing process

The assembly sewing process is the most labour-intensive part of apparel manufacturing. The progressive bundle unit system is common in sewing room design. Recently, many manufacturers have installed unit production systems as a means to improve efficiency and effectiveness. Assembly involves a set of workstations in which a specific task of a pre-defined sequence is processed. 

In the apparel industry, the assembly process involves a set of workstations in which a specific task is processed in a pre-defined sequence. Before production, in order to achieve a balanced line, the sewing line supervisors assign one or mote sewing operatives to each task based on the standard time required to complete the task. However, industrial experience shows that it is difficult to achieve a perfectly balanced line because the production rate of each workstation is different. Imbalance occurs due to various factors, including fluctuation in operative efficiency, frequent change of product style, order size, prior experience and some unexpected factors, such as absenteeism, machine breakdown, and so oa Line balancing control is required to smooth away the bottlenecks. 

Assembly seam. Seams of this type are especially important for tool loading and the injection process. The sub-preforms can be assembled by using suitable types of threads, which again assist the sewing operation. The preform assembly can either be two-dimensional or three-dimensional and the respective stitching parameters can be chosen to be different. 

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