48
3.10
Complete-cut punch
(only available for RE25!)
The complete-cut punch is situated in the machine extension and is mounted in the machine
frame. (see fig. 3.20)
All packages which are made in one complete stroke will be punched completely out of the
film. The residual film will be rewound by a skeletal waste film rewind unit.
The complete-cut punch is suitable for any kind of film or combination (such as rigid films,
multilayer aluminum films and flexible films).
Almost any package shape can be cut. (see fig 3.19 for examples)
3.10.1 Method of operation
The first step is to lift the counter plate with air cylinder “D” against the upper part. Now the
film with formed packages will be clamped between counter plate and upper part. This is
directly followed by air cylinder “E” which runs out and lifts up the integrated conveyor.
At this point the air cylinder “A” pushes down the product pushers. At the same time the
hydraulic cylinder “I”, which is connected to the knife plate goes down to cut the packages out
of the film.
The pressure and the air speed
to cylinder “A” is adjustable to a level just enough to strain the
film a little during cutting. The knives goes smoothly through the film, and the air cylinder “A”
brings the packages by product pushers through the counter plate to the integrated conveyor.
When the knife plate reaches the sensor for its bottom position, Cylinder “A” and cylinder “I”
goes up to their start positions. Air cylinder “E” goes down to bring the conveyor down to a
level where the packages can be transferred to the discharge conveyor.
When all products are transferred to the discharge conveyor, the air cylinder “D” will pull down
the counter plate to its bottom position. Now next film advance can be done to cut the next
complete stroke.
Figure 3.19 Complete cutting knives
A. Air cylinder, discharge pushers
B. Upper part / knife housing
C. Sheer-lifting system, counter plate
D. Air cylinder, counter plate
E. Air cylinder, conveyor
F. Vertical guide, counter plate
G. Integrated conveyor
H. Spring housing
I. Hydraulic cylinder
I
H
G
F
E
D
A
C
B
Figure 3.20 Complete-cut puncher