BISMILLAHIRRAH MANIR RAHIM

WELCOME TO MY PRESENTATIONStudy on cotton drawing

frame

presenter

NAME : MD. NUR UDDINID :135027Department of textile engineering (2/1)Contact no :01914925458

INTRODUCTION

What is draw frame?Draw FrameDraw frame is a machine for combining and drawing slivers of a textile fiber (as of hemp for rope manufacture or cotton for spinning). Drawing is the operation by which slivers are blended, doubled and leveled. In short staple spinning the term is only applied to the process at a draw frame.

In drawing slivers are elongated when passing through a group of pair rollers, each pair is moving faster than previous one.

Objectives of draw frame To straighten the fibers in the

slivers. To make parallel the fibers in

their sliver axis. Hooks created in the card are

straightened through the suction ,intensive

dust removal is achieved To make perfect blending of

the slivers. To reduce irregularities of

fiber by doubling and drafting. To improve the uniformity and

evenness of the sliver.

Task of draw frame1.Equalizing2.Parallelizing3.Blending4.Dust removal

Actions Involved in Draw FrameDrafting: It is the process of increasing length per unit weight of sliver. It is mainly due to peripheral speed of the rollers.

Doubling: The process of combing two or more carded sliver into a single form is called doubling. In draw frame m/c generally six slivers are fed to convert into one i.e. six doubling.

Drawing: In the cotton industry the term is applied exclusively to processing on the draw frame, where the operation is one of doubling and drafting. Drawing= Drafting + Doubling.

Drafting system

There is many others drafting system…………..

A short video of drawing frame

1. 4- over-3 roller drafting arrangement 2. 3-over-3 roller drafting arrangement 3. 3-over-4 roller drafting arrangement 4. 5-over-3 roller drafting arrangement

In draw frameDrive principal

In the draw frame

Sliver entering in the working region

Drafting action

Drafting roller

Drafting action

Conventional and semi automatic transport system

Fully automatic system

This is the