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Effect of Speed on Twist and Quality Ratio of Jute Yarn in Apron Draft Spinning Frame.

Dr. Md. Osman Ghani Miazi
CSO
Mechanical Processing Division, BJRI

Dr. A. K. M. Mahabubuzzaman
PSO
Mechanical Processing Division, BJRI

Md. Asaduzzaman
Director(Tech)
Director (Tech), BJRI

Abstract/ Executive Summary:

In this experiment yarns of 7.5 lbs/spy. were produced at different spindle speeds of 2800, 3200, 3500, 3800 and 4200 rpm. Tensile strength, Quality ratio, extension at break of produced yarn at different spindle speed was determined. According to the experimental findings, spindle speed of 4200 rpm shows better quality of 7.5 lbs/spy jute yarn.

Keywords: Twist, Quality ratio, Spinning, Apron draft spinning

Location: Machinery Development and Maintenance, Mechanical Processing Division, BJRI, Dhaka

Start Date: 01-07-2011

End Date: 30-06-2013

Program Area: Knowledge Management

Commodity: Jute

Objectives:

The spindle speed has various effects on productivity and quality of yarn. It is directly related to the yarn tension during the winding of yarn on a bobbin. Spinning tension and spindle speed are two closely related parameters. It has been known from the earliest days of spinning that the spindle speed is increased, more yarn breakages occur.

Methodology:

BWC grade jute fibre was used for conducting the experiment. Back processing of jute fibre were same as usual. Liner density of third drawing sliver was controlled according to the requirement yarn linear density. In this year, yarns were produced at different spindle speed. Applied speeds were 2800, 3200, 3500, 3800 and 4200 rpm. At each speeds ten samples were taken. For each sample linear density, tensile strength, extension at break and quality ratio were measured at standard testing condition.

Source of Information: Annual Technical Report: 2011-2012, BJRI

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 1,00,000/-(One lac fifty thousand taka)

Total Budget (Tk.) : 1,00,000/-(One lac fifty thousand taka)

Achievement/Findings:

In this experiment, Tensile strength, Quality ratio, extension at break of produced yarn at different spindle speed was determined. At spindle speed 4200 rpm shows better yarn quality compared to other spindle speeds of 2800, 3200, 3500, 3800 rpm which was 108%. The produced yarn was also regular and uniform. As a result, for 4200 rpm, may be taken as optimum spindle speed for production of 7.5 lbs/spy. jute yarn using Apron draft spinning frame.

Knowledge Management: Report/Proceedings