FISCHBEIN
®
Co. MODEL PBC-6000™
OPERATOR’S MANUAL
REV. D 2005-03
58
C.
This picture indicates that the bag has
been sealed for the most part, but there
are an excess amount of large wrinkles in
the flap. They are compressed to the
surface, but still may allow leakage of the
product. Here are some of the possible
causes:
1.
Compression set too high. If the
pressure between the two
compression rollers is too great,
the flap will move too easily with
the hot glue being extruded from
the flap bottom and trailing edge
of the bag. (
Sections 8.5.2-3,
pages 30 and 37
)
2.
The pressure between the creaser
blade and die is set too high. The
creaser assembly must break the
bag fibers to produce a line for the
fold. The radial design of the
creaser produces some wrinkles in
the flap. If the pressure is set too
high, the bag will have difficulties
entering between the die and
blade, causing large wrinkles.
(
Section 8.5.6, page 42
)
D. Illustration 8.33, D
shows the flap
unevenly sealed. Uneven seals may leak
product from one of the gussets and not
provide sufficient strength along the
entire seal. There are a couple of
conditions that may cause this effect:
1.
The most common cause is due to the angle that the bag top enters the machine
infeed. Make sure your bag guides and operators are properly entering the bag tops
into the infeed.
2.
The machine carry through belts are not synchronized with the conveyor system. Use
a tachometer with a surface wheel tip to measure and adjust the speeds of the two
systems. If the speeds conflict, then the bag will either lean forward or backward as it
passes through the PBC.
3.
The bag top may be catching on an internal component as it passes through. Remove
the front shrouding and inspect a bag as it passes through the machine. Check to see
if any part of the bag is catching on machine components that would delay the top of
the bag. Make adjustments to the component(s) as needed. Such as the pressure
between the creaser wheels.
A common problem is caused by the glue build up on the inside of the folder. Clean
the folder and manifold, using a dull edged tool to prevent scratching the surfaces. A
Illustration 8.33
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