Driving Mechanism and Production Calculation of Tappet Loom

Experiment name:
Study on driving mechanism and production calculation of tappet loom.

Introduction:
A tappet having a rotary motion depresses a follower and a lever, known respectively as the anti-friction bowl and the treadle arrangement, by means of which the heald shaft is operated. A tappet is a cam having some dwell period which controls the up/down movement of heald shafts and the time of opening of the shed. Tappets are eccentric discs, which displace anti-friction bowls that are pressed against their active surfaces. The tappets can be of negative type or positive type.

Objectives:

1. To know about the driving mechanism of tappet loom.
2. To know about the production of tappet loom.
3. To know about the different parts of the tappet loom.
4. To write a report according to this experiment.

Different part of tappet loom:

1. Motor
2. Motor pulley.
3. Machine pulley.
4. Tappet
5. Gear
6. Crank Shaft
7. Bottom shaft gear.

Specification:

1. Motor RPM:1440
2. Motor pulley dia:3.5inch
3. Machine pulley dia:18inch
4. Teeth of gear -1:    36
5. Teeth of bottom shaft gear: 72

Construction of the driving mechanism:

1. The machine pulley connected with motor by belt.
2. Machine pulley is connected with crank shaft and crank shaft wheel.
3. Crank shaft wheel connected with bottom shaft wheel. This rotates the bottom shaft.

Working Principle:

1. When motor rotate the machine pulley also rotate because motor pulley connected with machine pulley by belt.
2. Crank shaft wheel also rotate with machine pulley and crank shaft which transmit the motion to bottom shaft wheel.

Production of Tappet Loom:

Process-1:

………………………………………………………….Motor pulley dia                 Teeth of gear-1
RPM of Bottom shaft = Motor RPM x ———————————- x —————————–————
………………………………………………………….M/C pulley dia              Teeth of bottom shaft gear

……………..3.5”       36
= 1440 x ——– x ——–
……………..18         72

= 140

PPM = RPM of Bottom shaft x 2

………………3.5”       36
= 1440 x ——– x ——– x 2
………………18         72

= 280

Process-2:

PPM = RPM of Crank shaft x 2

…………….3.5”
= 1440 x ———
…………….18

= 280

……………………PPM         280
Production = ———- = ———– inch/min
…………………….PPI           60

….280 x 60 x 8
= —————————— meter/shift
…..60 x 39.37

= 56.896114 meter/shift.

Conclusion:
By this experiment we came to know about gearing diagram and calculated the production of tappet loom.

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