8
Do wn s ea li ng k ni fe
U pp er s ea li ng k ni fe
He a ti ng b lo ck
P ap er pu ll w he el
P r es s- fi t wh ee l
B ag m a ke r
Pa ck e d pr od uc t
Pa pe r pu ll w he el
op en -a nd -c lo s e ha nd le
Pr es s -f it w he el s pe ed
a dj u st in g ha nd wh ee l
P re ss -f it w he el
o pe n -a nd -c lo se h an dl e
R oc ki ng be am r ol le r
Pa ck in g f il m
C od e pr in ti ng m a ch in e ro ll er
Pa ck in g f il m ro ll
Dr iv e r ol le r
Co lo r m ar k el ec tr ic e ye
Ru bb er ro ll er
Diagram 4. The film circumambulating route when the machine is equipped with a code printing machine.
b). When the machine is not equipped with a code printing machine, the
circumambulating route should be arranged as shown in diagram 5.
Do wn s ea li ng k ni fe
U pp er s ea li ng k ni fe
He a ti ng b lo ck
P ap er pu ll w he el
P r es s- fi t wh ee l
B ag m a ke r
Pa ck e d pr od uc t
Pa pe r pu ll w he el
op en -a nd -c lo s e ha nd le
Pr es s -f it w he el s pe ed
a dj u st in g ha nd wh ee l
P re ss -f it w he el
o pe n -a nd -c lo se h an dl e
R oc ki ng be am r ol le r
Pa ck in g f il m
Pa ck in g f il m ro ll
Dr iv e r ol le r
Co lo r m ar k el ec tr ic e ye
Ru bb er ro ll er
Diagram 5. The film circumambulating route when the machine is not equipped with a code
printing machine.
9
Regardless what circumambulating route is adopted, when the film enters the bag
maker, open the mid-sealing open-and-close handle, make the paper pass through the
paper pull wheel, mid-sealing heating board, press-fit wheel, then close the
open-and-close handle, run the machine by inching, make the packing film pass
through the end sealing knife, now the film installation is completed.
2) Packing film tension and central aligning adjusting
When the packing film pass through the bag maker, if the tension of the packing
film is uneven, i.e., loose in the middle and tight on both sides, or tight in the
middle and loose on both sides, the paper transfer will become unsmooth, at this
time, it needs to adjust the position of the swing roll (see diagram 2) or the angle of
the swing link, this will change the relative position between the swing roll and the
bag maker, thus the tension of the packing film will be adjusted to a even tension as
required.
If the mid-sealing of the packed product is uneven, it needs to adjust the “packing
film central aligning adjusting handwheel” (see diagram 2), until the two sides of
the mid-sealing are lined up. Adjustment in each time should not be too large (the
adjusted result will not be reflected immediately).
4.3. Bag maker
The width of the bag maker can be adjusted . The proper width of the bag maker
should be the width of the packed product plus 5mm positive allowance.
4.4. Mid-sealing mechanism
Mid-sealing mechanism consists of a paper-pull wheel, heating block, press-fit
wheel, open-and-close handwheel, press-fit wheel speed adjusting handwheel etc.
When the packing film passes through the paper-pull wheel, heating block, press-fit
wheel, if paper is laid up or strained, it should be adjusted with the “press-fit wheel
speed adjusting handwheel”.
Adjusting the height of the mid-sealing mechanism.The height of the mid-sealing
mechanism should be adjusted according to the height of the packed product .
Mid-sealing should result a tight sealing and clear lines, otherwise it should be
adjusted, and following is the adjusting method:
1) Put two white papers, between which a carbon paper is sandwiched, onto the
mid-sealing wheel and turn it one revolution, open the two white papers, the
printed marks on the two white papers should be clear, it not, adjust the meshing
position between the two wheels, check the printed marks again, until the printed
marks are clear on the papers.
2) If the meshing is correct and the temperature is proper, but sealing quality is still
undesirable, it needs to adjust the set screws to limit the meshing pressure of the
sealing wheel, till the sealing becomes desirable.
