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Find Out the Effect of Various Speed of Breaker Card Cylinder for Same Count of Blended Yarn with Same Grade Fibres.

Mohammad Maniruzzaman
SSO(CC)
Spinning Department of Mechanical Processing Division, BJRI.

Dr. A. K. M. Mahabubuzzaman
Principal Scientific Officer in charge
Spinning Department of Mechanical Processing Division, BJRI.

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

Abstract/ Executive Summary:

The study was conducted only on BWB grade of fibre. Five different delivery speed i.e. 2076, 2162, 2335, 2508 and 2854 in/min of the breaker card machine were attained by changing gears in the breaker card cylinder. The effect of this speed variation of the quality of the yarn of 276 tex (8 lbs/spy) in terms of actual count, tensile strength, CV% of breaker card sliver and quality ratio were studied. With the increase of delivery speed, CV% of the weight of the breaker card slivers decreased gradually. Medium speed of the cylinder displayed better effect in terms of quality ration (88.75%).

Keywords: Breaker card, Cylinder, DCP

Location: Spinning Department of Mechanical Processing Division, BJRI.

Start Date: 01-01-2006

End Date: 30-06-2010

Program Area: Resource Development and Management

Commodity: Jute

Objectives:

The present work has been undertaken to study the effects of speed on yarn quality. All other parameters of processing sequences will remain same for all the experiments.

Methodology:

One type of jute fibre Bangla white B (BWB) grade and acrylic fibre (80:20) 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 by changing the gears of the cylinder in five positions i.e. change pinion 48, 50, 54, 58 and 66 for 2076, 2162, 2335, 2508 and 2854 inch/min delivery speed respectively for producing 276 tex (8 lbs. /spy) yarn. Slivers of 5 yards length taken randomly from the breaker card and processed with each of the different delivery speed were weighed. Then % CV of the weight of the breaker card slivers was calculated. The five different slivers obtained from breaker card was further processed through all the stages of conventional jute processing and 276 tex (8lbs. /spy) yarns were spun. Finally, the spun yarn was tested as per standard methods.

Source of Information: Annual Technical Report: 2010-2011, Page: 100-101, BJRI

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 1,50,000/-(One lac fifty thousand taka)

Total Budget (Tk.) : 1,50,000/-(One lac fifty thousand taka)

Achievement/Findings:

From the study of the yarns processed from sliver obtained by changing delivery speed of the breaker card cylinder. It is observed that change in the cylinder speed from standard in either direction resulted in yarns of low tensile strength and quality ratio. But in case of breaker delivery speed lower than the standard, yarns showed better uniformity in terms of CV% of tensile strength with less deterioration in the quality ratio%. It may be 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 breaker card slivers decreased, indicating more uniformity in the sliver weight. 57 teeth in the gear of cylinder i.e. medium speed of cylinder which is considered as the standard displayed better action on the quality and uniformity of the yarns.

Knowledge Management: Report/Proceedings