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INFORMATION ABOUT THE CORRECT USE
OF
I.T.B. SEAMLESS PASTING BELTS
1) Paste
Belt pasting machines operate at the best with crunchy
paste because it has excellent cohesion to itself and it
does not penetrate the belt. This assures longer belt life.
The texture and crunch of the paste are increased by:
- increasing the acid addition
- increasing the specific gravity
- decreasing the speed of the mixer
When the paste coming from the mixer is too hot - over
38°C (100° F) - the moisture in the paste will evaporate
and change the consistency of the paste.
This can affect the operation of the machine as well as
the performance and life of the belt.
To facilitate good machine operation, it is also recommended
the paste to be about 18 to 22 reading on a globe penetrometer.
If paste sticks to the belt, tighten the squeeze roller
to remove more moisture from the belt. If paste sticking
or pulling persists, the paste is too wet or the belt is
too old and saturated with hard oxide and must be replaced.
2) Squeeze Roll
The squeeze roll is used to squeeze water out of the
belt. It also presses the belt against the drive roll to
avoid belt slippage and to aid in belt guiding. It is ideal
to have sufficient moisture in the paste to provide a flow
of water out of the belt.
If the squeeze roll is adjusted too tight because of stiff
paste, the belt may stretch excessively. Also stiff paste
will not stick well to the grids. Again, use wet paste and
a cut-off wire when necessary.
3) Belt Cleaning
For good plates and long belt life, the belt must be
cleaned and flushed until clean water comes out of it at
the squeeze roller. Also, inject water to the underside
of the belt next to the rollers. This water will be forced
through the belt by the squeeze roll and flush out the paste
and oxide. If residual paste in the paste is allowed to
harden, it will damage the water absorbancy of the belt
and it will also crack the belt fibres and plies.
Therefore, keep the belt wet all times when the machine
is not in use.
4) Belt life-time
Under good operating conditions an I.T.B. belt can easily
paste over 1,000,000 panels.
Once a belt is satured with paste and the surface is too
smooth and too hard, little can be done except install a
new belt.
When the top surface of a belt has worn smooth, the oxide
will tend to stick even when the moisture content in the
belt is correct. In this case belt life can be extended
considerably by placing a steel cut-off wire diagonally
across the belt surface to separate the plates.
When the pasting belt is new, use of the plate cut-off
wire (piano wire placed diagonally across the belt following
the hopper to release plates from the belt) is not recommended.
If paste begin to pull from the panels, the wire can be
added. Wrapping the ''paste finishing rolls'' (located at
the exit end of the paster) with a cheese cloth or tobacco
cloth with half absorb moisture from the pasted panels and
apply an added textured surface to the upper and lower pasted
panel surfaces.
This extra added surface texture has been found to add the
plate's initial cranking performance.
5) Check list
When the belt pulls paste, look for the following:
A) belt or paste is too wet
B) belt scraper is not cleaning the belt
C) squeeze roller is not tight enough to remove
enough water from belt
D) belt is saturated with paste and has lost the
property to absorb water.
6) Belt Storage
Belt is very stable and will not shrink nor change its
dimensions. It is not affected by moisture nor temperature.
No special storage conditions are requested.
DATASHEET - SEAMLESS PASTING
BELTS - I.T.B. TYPE E-1
| 1.0 Description
1.1 Endless pasting belts used for automatic
pasting of battery grids on pasting machine (Hadi,
Sovema, Wirtz, Mac, Winkel or any type of home made
pasting machine).
1.2 The belt is seamless and there is no splice
(joint) thanks to the new patented I.T.B. belt construction.
1.3 Textile structure:
Woven fabric at the external pasting surface
and non-woven synthetic mat at the internal surface.
1.4 Material:
High quality absorbent cotton (external surface)
and synthetic fibres (internal surface).
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| 2.0 Characteristics
2.1 Specific tensile strength 220 daN/cm
lengthwise and 155 daN/cm crosswise
2.2 Belt tensile strength (100" x 13"),
lengthwise: 7000 daN
2.3 Average elongation at break: 12 %
2.4 Dimensional stability to combined temperature
and
moisture (storage condition - ITB test): no size
variation
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| 3.0 Dimensions
3.1 Standard thickness 8,5 mm (0,33"
for automotive pasters) and
9,5 mm (0,37" for industrial pasters)
3.2 Standard nominal lengths:
2540 mm - 100"
2565 mm - 101"
3784 mm - 149"
3899 mm - 153,5"
3.3 Standard nominal widths:
330 mm - 13"
355 mm - 14"
406 mm - 16"
508 mm - 20"
619 mm - 24"
660 mm - 26"
685 mm - 27"
762 mm - 30"
Other sizes available on request |
| 4.0 Tolerances on actual
dimensions
4.1 Thickness variation on
same belt: ± 0,10 mm (+ 0,004")
4.2 Thickness variation from
belt to belt: ± 0,25 mm (± 0,01")
(automotive plates)
-0+0,50 mm (-0 + 0,02") (industrial plates)
4.3 Length: ± 0,5 %
4.4 Width: ± 2 mm (± 0,08")
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Note: The above data are given for information
only and are the average results of our final inspection.
Slight differences are possible on individual belts due
to raw materials natural variations.
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