Tetra Pak HOYER COMET N, Manual

Page: 65 / 151

6-11
Tetra Pak
Hoyer
CN 03 F A 01
Fig. C.3
6
7
2
4
3
1
5
8
9
13
12
11
10
Min Max
This device is composed of lid/foil units (Part.1,
Fig.C.3) assembled on a holder fixed to the structure,
and of a mobile frame (Part.2, Fig.C.3).
The handling of the mobile frame is achieved by
means of an articulated quadrilateral
(Pos. 3, Fig. C.3) that is controlled by a cam (Pos.
4, Fig. C.3).
The articulated quadrilateral is connected to two
pneumatic actuators
The function of the actuator (Pos. 5, Fig. C.3). is to
get the drive roller (Pos. 6, Fig. C.3) adhere to the
cam (if deactivated the movement of the mobile
frame stops).
The function of the actuator (Pos. 7, Fig.C.3). is that
of bearing the load of the mobile frame during the
upward phase (the pressure of the actuator can be
adjusted by means of the governor (Pos. 8, Fig.
C.3)).
During the downward phase the pneumatic actuator
(Pos. 7, Fig. C.3) in the unload mode is connected
to the release pneumatic valve which makes the
movement of the mobile frame much smoother.
Assuming that, initially, the station is located in a
high position, the operation sequence is the
following:
a) Activation of the suction cups vacuum controlled
by the cam.
b) Suction pressure control by means of a vacuum
detector which indicates the correct picking of lids.
If there is no vacuum, this means that one or more
lids/foils are not attached safely to their respective
suction cup. Under these conditions the station does
not move down, the vacuum turns off to be turned
on again in the next cycle. However, if the vacuum
detector indicates that there is a vacuum in the
suction cups, the down stroke of the station may
take place.
.
PLEASE NOTE:
The threshold of the vacuum detector can be set
by adjusting a screw located on the pneumatic
panel.
If the station happens to move down even without
picking up the lids/foils, adjust the vacuum
detector by increasing the threshold (rotate
towards MAX) until the station makes no
downward motion in the absence of lids.
However, if in the presence of lids the station
moves down, decrease the threshold (rotate
towards MIN).
c) A cam controls the downward stroke of the mobile
crosspiece.
d) The suction cup holder is rotated by 180 degrees
downwards by means of the rotating actuator (Part.9,
Fig.C.3).
e) The lid/foil vacuum is turned off by a cam so that
the lids/foils are released.
f) The mobile crosspiece moves back to its starting
position.
g) The suction cup holder is rotated by 180 degrees
upwards.
For details on how to activate the station, see
Chap.5.
Adjustments
For setting the information on the cams, refer to
Chapter 5. Setting the work parameters.
Several different mechanical adjustments are
possible:
- By loosening the stop nuts (Pos. 10, Fig. C.3)
and by acting on the lock nuts (Pos. 11, Fig. C.3) the
positioning of the magazine holder frame is achieved
in height (Pos. 1, Fig.C.3).
- By loosening the stop nuts (Pos. 12, Fig. C.3)
and by acting on the lock nuts (Pos. 13, Fig. C.3) the
positioning of the mobile frame is achieved in
height (Pos. 2, Fig.C.3).
WARNING
The lateral protection of the kinematic
mechanisms in connection with the trays is not
allowed with lid dispenser stations.
A crushing hazard signal is
placed on the fixed protection..
6.1.8 Lid/alu-foil dispenser