study on cotton draw frame
TRANSCRIPT
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
