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To Study the Effect of Various Speed of Finisher Card Cylinder on Same Count of Yarn with Same Quality Fibre.

Dr. A.K.M. Mahabubuzzaman
Principal Scientific Officer(CC)
Spinning Section, Mechanical Processing Division, BJRI

Dr. Md. Osman Ghani Miazi
Chief Scientific Officer
Mechanical Processing Division, BJRI

Md. Kamal Uddin
Director (Technology)
Director (Technology), BJRI

M..A. Quashem
PSO
Mechanical Processing Division, BJRI

M.M Alamgir Sayeed, SSO
SSO
Textile Physics Division, BJRI

Dr. M.Dilder Hossain,
Professor of Physics
Professor of Physics, Jahangirnagar University.

Abstract/ Executive Summary:

With the increase of delivery speed, CV % of the weight of the finisher card slivers decreased gradually. The optimum speed of the cylinder displayed better effect in terms of quality ratio (97%) of the yarn. This delivery speed of cylinder will be attained good quality yarn in jute spinning industry.

Keywords: Finisher card, Count, Tex, BWB

Location: Spinning Section, Mechanical Processing Division, BJRI

Start Date: 01-01-2006

End Date: 30-06-2007

Program Area: Postharvest and Agro-processing

Commodity: Jute

Objectives:

In jute processing system, Finisher Card is an important step in processing line of jute spinning. The cylinder is the heart of the whole machine due to the combing action, which causes from its cylinder speed and other rollers. Carding action mainly occurs in breaker card machine. In Finisher card, there is to further card and comb out the continuous ribbon of sliver received from the breaker card. This study was carried out to find out the effectiveness of various speeds of Finisher card cylinder on fibre length and quality of jute yarn 276 tex (8lbs/spy).

Methodology:

Jute fibre Bangla white B (BWB) grade was selected as raw material for this experiment. Jute fibre was piled with the application of 25% normal emulsion (i.e. 20 % mineral oil, 79.7% water and 0.3% nonidet) and kept for 48 hours for maturation. The entire piled jute was processed on breaker card machine. Eleven slivers received from the breaker card are placed side by side at the feed end of the finisher card and fed into this machine. These slivers were processed through finisher card machine by changing the gears of the cylinder in five positions i.e. 54,58,60,66 and 68 for 1453,1560,1614, 1775 and 1830 inch/min delivery speed respectively for producing 276 tex. (8 lbs./spy) yarn. The delivery speed has been calculated as follows: R.P.M. of Motor 725, Motor pulley 7 inches diameter and machine pulley 34 inches diameter. R.P.M. of machine pulley, cylinder, cylinder pinion and stripper driving pulley all will be same, i.e. 725 x 7”/34”x π/ π =149.2 So, Delivery speed (inch/min)= cylinder rpm x (no. of teeth cylinder change pinion/no. of teeth in delivery wheel) x ? x diameter at delivery roller. Here, no. of teeth in delivery wheel is 74 and diameter of delivery roller is 4.25”. Slivers of 5 yards length taken randomly from the finisher card and processed with each of the different delivery speed were weighed. Then % CV of the weight of the finisher card slivers was calculated. The three different slivers obtained from finisher card were further processed through all the stages of conventional jute processing and 276 tex (8lbs./spy) yarns were spun. Finally, the spun yarns were tested as per standard methods.

Source of Information: Annual Technical Report: 2005-2006, 2006-2007 Page: 78-80

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 90,000/-(Ninety thousand taka)

Total Budget (Tk.) : 90,000/-(Ninety thousand taka)

Achievement/Findings:

From the study of the yarns processed from the finisher card sliver, it was observed that changes in the delivery speed of cylinder from middle in either direction are resulted in yarns of tensile strength and quality ratio. It was noted that with the increase of gear teeth of the cylinder, in other words delivery speed of the cylinder, CV % of the weight of the finisher card slivers decreased, indicating more uniformity in the sliver weight. Five different delivery speeds i.e.1453, 1560, 1614, 1775 and 1830 inch/min delivery speed respectively on the finisher card machine were attained by changing gears in the finisher card cylinder. The effect of this speed variations on the quality of the yarn of 276 tex (8 lbs/spy.) in terms of actual count, tensile strength, CV % of tensile strength and quality ratio were studied.

Knowledge Management: Report/Proceedings