Calculation of Draft Constant

Name of the experiment: 

                                           Calculation of draft, draft constant and draft in each zone of the ring frame.

Objects: 1) To find out draft, draft constant of the ring frame.
2) To find out draft of each zone of the ring frame.

M/C specifications: 

• RPM of the motor =1440
• Dia of the motor pulley = 5”
• Dia of the tin cylinder pulley = 10.5”
• Dia of the tin cylinder = 10”
• Dia of the wharve = 1.125”
• No of teeth of fibre wheel = 42T
• No of teeth of front roller driving wheel = 98T
• Dia of the front roller = 1”

Gearing diagram:

Figure :- Gearing Diagram of Drafting Zone of Speed Frame Machine 

Calculation of draft, draft constant and draft of each zone of the ring frame: 

 

Conclusion: Ring frame is the final and very important machine for build the yarn onto bobbin in a form suitable for storage, transportation and processing. It is used to twist the drafted strand to form yarn of required count and strength.