Delfin LYRA - Sealing Pressure Adjustment

Pag 82 / 154
Manuale Lyra 600 sx elettr eng
Sealing pressure adjustment:
For example:
– if the seal tends to open increase the temperature. (5°C at a time)
– if the film tends to shrink under the excessive heat lower the temperature.
– (5° at a time)
– if the sealing pattern (humps) are only fairly visible, apply more pressure to the
jaws, if the sealing pattern (humps) are profound and contain cuts proceed as follows
to reduce the pressure of the jaws:
a) Disconnect the electrical supply to the machine.
b) Loosen the back guard of the crimper assembly
c) Loosen the 4 bolts ( Fig.8.2.4 pos. 1) of the upper jaw gear placed in the internal part
of the machine.
d) Re-connect the electrical supply to the machine and wait for the sealing jaws to reach
the imposed temperature.
ATTENTION The slip rings of the sealing jaw assembly will have electrical
supply to them, it is therefore necessary to pay careful attention not to touch
them with your hands or arms.
e) To apply more pressure on the seals, loosen the two counter nuts ( Fig.8.2.3 pos.1) do
not move the two nuts ( Fig.8.2.3 pos. 2)
f) Loosen the two bolts ( Fig.8.2.3 pos. 2) clockwise equally in order to apply more sealing
pressure or vice-versa to reduce the sealing pressure. Make sure the jaws are parallel
one to each other, very important in order to obtain a uniform seal on the entire width.
g) Re-lock the counter nut ( Fig.8.2.3 pos.1)
h) Repete the procedure from c. point to d. point in order to obtain an optimal seal.
ATTENTION It is very important that the teeth of the jaws never touch
each other on there tips, this in order to avoid serious damage.
i) Block the 4 bolts (Fig.8.2.4 pos.1) of the upper jaw gear, during this operation make
sure you eliminate the play between the upper and lower gear. The play is eliminated
by turning the external half of the gear clockwise.
j) Close the jaws one against each other and make sure the upper jaw is in line with the
lower jaw. If this is not the case, loosen the two screws and grub screw placed on the
upper jaw flange (Fig.8.2.4 pos.2 & pos. 3), now you can move the upper jaw until it
is in line with the lower jaw.
k) Disconnect the electrical supply from the machine.
l) Re-block the two bolts and the grub screw on the upper jaw.
m) Re-assemble the back guard of the transverse sealing jaws assembly, and
connect the electrical supply to the machine.
n) The pressure of the upper transverse sealing jaw against the lower jaw will depend on
the nature, thickness and quality of the film to be sealed. The more/less pressure is
adjusted by turning the screws (Fig.8.2.3 pos. 3), (30 mm. spanner), conversely to
remove the pressure.