30
Md. N. H. Nihad et al.
0
1
2
3
4
5
6
7
8
9
0
2
4
6
8
1 0
EffecƟve Time (in Hour)
Total ShiŌ Time (in hour)
OperaƟon
with Bobbin
Bobbinless
OperaƟon
Fig. 6 The graph of effectiveness in an 8 h shift
cutting, etc., for yielding the modification. So, the possible increase in the cost of
this modification is approximately 200 USD (17000 BDT). This increase is about
only 30 % cost of any modern conventional lock stitch sewing machine. This is very
promising to get such effective modification at a cheap cost.
4 Conclusion
The constructed design is simple enough to industrialize at a reasonable cost. Moreover, no additional installation is needed and the previous setup for pre-wound bobbin
can be neglected. It’s quite effective in terms of a large number of productions. The
objective of the work is achieved by developing such an efficient design which opens
up a new field for further research. With more support and investment bulk production would be possible to spread out the impact of this research. In the RMG sector,
such modification and analytical study are necessary for export-oriented countries
like Bangladesh, India, Vietnam, China, etc. The conducted modification is applicable for any kind of conventional single needle Lockstitch sewing machine with
the bobbin and rotary hook. Because the modification actually reshaped the bobbin
package holding chamber and the stitching mechanism with a newly modified hook.
There are some limitations to the performance analysis with the need for further
amendment. The indicated construction can be approached to advance the functional
designing of specific elements.
Md. N. H. Nihad et al.
0
1
2
3
4
5
6
7
8
9
0
2
4
6
8
1 0
EffecƟve Time (in Hour)
Total ShiŌ Time (in hour)
OperaƟon
with Bobbin
Bobbinless
OperaƟon
Fig. 6 The graph of effectiveness in an 8 h shift
cutting, etc., for yielding the modification. So, the possible increase in the cost of
this modification is approximately 200 USD (17000 BDT). This increase is about
only 30 % cost of any modern conventional lock stitch sewing machine. This is very
promising to get such effective modification at a cheap cost.
4 Conclusion
The constructed design is simple enough to industrialize at a reasonable cost. Moreover, no additional installation is needed and the previous setup for pre-wound bobbin
can be neglected. It’s quite effective in terms of a large number of productions. The
objective of the work is achieved by developing such an efficient design which opens
up a new field for further research. With more support and investment bulk production would be possible to spread out the impact of this research. In the RMG sector,
such modification and analytical study are necessary for export-oriented countries
like Bangladesh, India, Vietnam, China, etc. The conducted modification is applicable for any kind of conventional single needle Lockstitch sewing machine with
the bobbin and rotary hook. Because the modification actually reshaped the bobbin
package holding chamber and the stitching mechanism with a newly modified hook.
There are some limitations to the performance analysis with the need for further
amendment. The indicated construction can be approached to advance the functional
designing of specific elements.