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Automatic cone winding productivity rise in mills

08 Jan '08
3 min read

In the last issue (July - August 2007), major findings of the 31st productivity survey relating to productivity up to spinning were published.

In this issue, the findings pertaining to post spinning section viz, cone winding and reeling are covered.

Productivity in automatic cone winding The average winder HOK adjusted to 40s is 3 compared to the standard of 2.4. This amounts to an average short-fall of 19% against the standard.

The largest single cause for this short-fall is the lower machine efficiency, which is only 85% of the standard. Between mills, the HOK varies from 1.1 to 7.6.

A little over one-fifth of the mills attain or excel the standard HOK of 2.4, even as in more than one-fourth of the mills, the HOK is 4.

Work assignments average 94% of the standard, with a between-mill variation from as low as 0.5 times to as high as 2.2 times the standard.

Overall, the average winding-on speed is equal to the standard of 1200 mpm. Between mills, the average winding-on speeds vary from 900 mpm to 1550 mpm.

As compared to the previous SITRA productivity survey in September 2004, there is an increase of 1.3% in automatic cone winding productivity in the mills which have participated in both the present and previous surveys.

Productivity in conventional cone winding:
The average winder HOK adjusted to 40s is 11.7 as compared to the standard of 8.2.

This means that the labour productivity forthe mills surveyed falls short of the standard by about 30% - 20% due to lower machine efficiency and the remaining 10% about equally due to the adoption of lower work assignments and lower winding-on speeds.

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