10. HOME SEAMER

HOME SEAMER

Aim: To seam product filled one end seamed can and measure the power transmission elements of a home seamer machine.

Apparatus:
  • Home seamer
  • One end seamed can
  • Tachometer
  • Seam micrometer
  • Seam cutting saw
  • Outside caliper
  • Measuring scale
  • Thread (Nylon)
Home seamer

Working principle: After filling the product the filled end (2nd end) is closed using the Home seamer, which is a simple machine operated both by electrical power as well as by hand wheel (without electrical power). In its working principle the rotating power is transferred to the driven pulley by hand wheel or using an electrical motor which in turn rotates driven pulley by ‘V’ belt. The driven pulley has a shaft on which there is a worm and worm wheel at the centre and bevel gear arrangement to rotate the chuck at the end of the driven pulley shaft. The worm wheel has a short shaft on which cams have been fixed on both the sides. By declutching the lever and rotating the hand wheel the narrow and wide grooved rollers alternatively come forward to do the seaming operation, when the cam profile is at top dead centre on the small roller and go backward when the cam profile is at bottom dead centre, thus completing the seaming operation. Home seamer machine can seam about 20-30 cans per minute.

The machine is essentially consists of the following parts.
  1. Cast iron body
  2. Driven pulley with hand
  3. Worm and worm wheel
  4. Bevel gears
  5. Cans
  6. Lifter
Procedure:
  • The condition of the machine is observed and if necessary greasing, oiling and cleaning should be done.
  • Chuck and seaming rollers should be tested to see whether they are in good condition or not.
  • Keep the filled can with lid over the lifter (base plate).
  • Raise the base plate to the seaming position by rotating the lifters handle in clockwise direction.
  • Lift up the seam locking lever.
  • Rotate the hand wheel in clockwise direction until the completion of seaming.
  • After the seaming operation is over the base plate (Lifter) is brought down by rotating lifter handle in anticlockwise direction and remove the seamed can.
Precaution:
  • This machine gives a narrower seam band since it is provided with a narrower roll groove than most of other seamers.
  • Give a little greater pressure to the lifter especially when seaming large size cans.
  • As chuck spindle turns relatively slowly, no remedy exists for can slipping other than greater procedure on the lifter of replacement at the chuck with a new one.
  • For lubrication, use 140-160 machine oil.
Observations:

Sl.No. Parameters  
1. Type of gears used  
2. No. of teeth on each gear (No.)  
3. Groove thickness of first operation roller(mm.)  
4. Groove thickness of second operation roller(mm.)  
5. No. of cans used (No.)  
6. No. of cans produced per minute (No.)  
7. No. of revolution of hand wheel (No.)  

Calculations:
1)
No. of teeth on driver gear
Gear ratio = ----------------------------------
Speed of driver gear

Speed of driven gear
= --------------------------------------------
No. of teeth on driven gear

2) Velocity ratio of belt drive

N2
= ------------
N1
d1
= ------------
d2
Where,
N1 = Speed of the driver in rpm
N2 = Speed of the driven in rpm
d1 = Diameter of the driver in cm
d2 = Diameter of the driven in cm

3) Length of the belt
(r1 – r2)2
L = (r1 + r2) + 2x + ------------
x

Where,
r1 = radius of the driver pulley in cms
r2 = radius of the driven pulley in cms
x = distance between the center of the pulley in cms

2 π NT
HP = ------------
4500

4) Diameter of the shaft

π
T = ------fsd3
16
Where,
Fs = Shear stress in Kg/ cm2
T = Torque in Kg-m
N = rpm
HP = Horse power
d = Diameter of driver shaft in cms

Last modified: Monday, 9 August 2010, 7:16 AM