Apparel Online Bangladesh Magazine Magazine March 2018 | Page 49

machine configuration as compared to 2:2 configuration (two operators for 2 workstations), refer Exhibit 1.2. Model 1278-6 from Atlanta Attachment Company incorporates a cylinder arm overlock sewing head with vacuum thread trimmer giving a precise cut Exhibit 1.1: Bottom Rib Attach Operation Machine Make Machine Model/ Serial No. Machine/ Operation Type Juki DDL 5550N Bottom Band Attachment Pegasus EXT5104- 04/433-4/ KS/FR151 Semi Automatic Atlanta Attachment Company 1:1 Conf iguration 1278-6 Automatic 7.65 7.2 Atlanta Attachment Company 1:2 Configuration 1278-6 Automatic 7.65 7.2 Loading for stitching (with allowance) Sewing (with allowance) Unloading after stitching (with allowance) Total Average Cycle Time (Secs) (with allowance) Prod./ Machine/ Hr. X No. of machines manned (Pcs) Prod./ Shift (Pcs) 31 31 116 929 14 14 267 2133 2.0 14.9 242 1939 2.0 14.9 457 3657 Pegasus and Atlanta Attachment Company are prominent brands in the market, offering automatic bottom rib attach workstations. Conclusion Use of technology has been successfully demonstrated in improving productivity and manpower utilization for bottom rib attache operation. Use of automats in deskilling the job, by minimizing human intervention is also demonstrated. Even though the automats are more suitable for the bulk manufactured products that offer longer runs for smaller orders, these machines can be utilized as external tasks by designing the line plans accordingly. Exhibit 1.2: Production Loss for AAC 1278-6 1:2 and 2:2 configurations Time Loss/Cycle (Secs) Time Loss/Hr. (Secs) Prod. Loss/Hr. (Pcs) Prod. Loss/Shift (Pcs) 0.45000 212 27 221 system for band and body panel. It is also equipped with pneumatic expansion rollers that facilitates loading of band and body panel to the sewing head. The machine has automatic stacking device that withdraws the sewn panel from the sewing position and stacks them automatically. The operator’s task is limited to folding the circular rib knit piece in half to form a band and placing it over the expansion guide rollers. The rollers automatically expand to load the body. The body is loaded over the rollers and band, and start sensor expands the rollers to sew position and indexes the parts under the presser foot and sew cycle begins. The operator is then free to load band and body panel on the second machine. When the finished seam is detected at the needlepoint, the parts are sewn further till a predetermined distance, thread chain is cut, and the part is automatically stacked. The productivity of the machine in 1:1, man pieces to-machine configuration is 242 pieces per hour and 1,939 pieces per shift, while in 1:2 configuration machine productivity is 457 pieces per hour and 3,657 pieces per shift. There is a loss of 27 pieces per hour in 1:2 man-to- www.apparelresources.com | MARCH 2018 | Apparel Online Bangladesh 49