Speed Frame | Necessity of Speed Frame / Simplex / Roving Frame | Objects / Functions of Speed Frame

Speed Frame:
Simplex is an intermediate process in which fibers are converted into low twist lea called roving. The sliver which is taken from draw frame is thicker so it is not suitable for manufacturing of yarn. Its purpose is to prepare input package for next process. This package is to prepare on a small compact package called bobbins. Roving machine is complicated, liable to fault, causes defect adds to the production costs and deliver the product. In this winding operation that makes us roving frame complex. There are two main basic reasons for using roving frame.

Speed frame
Necessity of Speed Frame:
1. The first reason is related to the required draft. Sliver is a thick, untwisted strand that tends to be hairy and to create fly. The draft needed to convert this to a yarn is in the region of 300-500. The drafting arrangements of ring spinning machines, in their current forms, are not capable of processing this strand in a single drafting operation to create a yarn of short-staple fibers that meets all the normal demands on such yarns. The fine , twisted roving is significantly better suited to this purpose.

2.The second reason is that draw frame cans represent the worst conceivable mode of transport and presentation of feed material to the ring spinning frame.

Objects/ Functions of Speed Frame:
1.Attenuation of drawn sliver to form roving of required count by drafting.
2.Insert small amount of twist to give required strength of roving.
3.Wind the twisted roving on to the bobbin.
4.Build the roving in bobbin such a form which will facilitate handling, withdrawing & transfer to the next process.

Operations Involved in Simplex Machine:
1.Creeling
2.Drafting
3.Twisting
4.Winding
5.Building
6.Doffing

Creeling:
To feed the sliver by the help of several rows of driver rollers to the machine.
  • Creel draft
  • Creel Stop motion
  • Block creeling
Drafting:
To reduce the wt/unit length of sliver to make it suitable for ring spinning system.

Twisting:
To insert small amount of twist to give required strength of roving.

Winding :
To wind the twisted roving on to bobbin.

Building:
To build the roving in bobbin such a form which will facilitate handling, withdrawing & transfer to the next process.

Doffing :
To replace an empty bobbin at the place of full roving bobbin.

Manufacturer of Speed Frame:
1. Rieter (Switzerland)
Used in recent spinning mill

2. Toyoda (Japan)(FL-16, FL- 100)
Used most in our country

3. LMW(India)/Laskmi

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