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Mathematical Problem of Breaker Carding Machine

**Mathematical Problem of Breaker Carding Machine ****Engr Avijit Dey ** Production Officer Fabian Group, Chittagong Mobile: 01836124490 E-mail: avijitdey43@yahoo.com

**Introduction: **Breaker cards are generally down striking and half-circular. In this machine the primary function of **jute carding** is done by the action of worker and cylinder and the cleaning actions is done between worker and stripper. It is called Breaker Card because it breaks up to the long reed of jute.
**The main three functions of breaker card are: **

- Individualization of fibre.
- Drafting of fibre.
- Sliver formation.

**Problem:1 **

A breaker card is set to work with a clock length of 12.9Yds and a draft of 12 in the machine. If the dollop wt is 30 lbs. What will be the wt of delivered sliver in lbs/100 Yds.

**Solution: **

Dollop.wt 1

**Sliver delivered per 100 yds** = **………………….** × **………** × 100

Clock length Draft

30 1

= **………..** × **……..** × 100

12.9 12

=19.38lbs.** (ANS) **

**Problem: 2 **

Calculate the production per hour of a breaker card machine from the following data:

- Feed roller speed=18ft/min
- Dollop wt=30 lbs
- Clock length =19.5 yds
- Waste=4%
- Efficiency =85%

**Solution: **

18 30 100-4

**Production per hour** = **…….** × 60×0.85×**……..** ×**………….** lbs/hr

3 19.5 100

= 451.93lbs/hr **(ANS) **
** **