vc999 K7, Operating Manual, Page: 36 / 121

Vacuum Packaging Machine VC999 K7
Operation
Page 36/121
Art.-No. 592.016 2008-11-26
9.2.2 Preparing the packaging material
The packaging material must be suitable for vacuum packaging and of a size suited to the product.
Packaging material requirements
The packaging material must be approved for vacuum packaging and for the product to be packaged,
and should have the following characteristics:
•
sealable
•
resistant to low temperatures
•
resistant to high temperatures
•
sufficiently extensible
Ask the shrink-film manufacturer for a data sheet on material performance.
Bag size
The bag must be large enough for the product not to reach the bag opening even when the bag is laid
flat.
A bag overhang of at least 5 cm is required for sealing. The optimum bag position is for the bag opening
to align with the outer guide plate edge.
If the bag is too long, it does not affect the packaging cycle, since unusually long bags are pre-
perforated (slit) prior to vacuuming. This enables the manual removal of bag waste after vacuuming.
9.2.3 Adjusting the packaging machine to suit the product
To optimize the packaging cycles, the following adjustments can be made to the Vacuum Packaging
Machine to suit the product:
•
height of sealed seam in relation to conveyor belt
•
volume of vacuum chamber (by inserting the filling plate)
9.2.3.1 Adjusting the height of the sealed seam
To achieve the optimum packaging result, the sealed seam should be half-way up the product. The
sealing bars can be adjusted in height to achieve this.
On the top sealing bar, this is done by moving the suspension element, and on the lower sealing bars
by inserting intermediate rods.
Without intermediate rods, the height of the sealed seam or lower sealing bar is 40 mm. A height of 80
mm above the conveyor belt can be achieved using an intermediate rod.