PET Protective Film / Release Film Slitting Machine
Detail description: suitable for PET protective film, release film
slitting.
Characteristics:
1. The two rewinding motors cooperate with the main motor to work
as three motors motion control, the main motor blocks the unwinding
and the rewinding motor control the tension, the tension of the
finished product is stable, good rewinding appearance.
2. The rewinding arm adopts the pneumatic coupling control the
balance, the contact pressure can be adjusted automatically during
rewinding, the contact pressure can be set. This machine can also
be equipped with discontinuous rewinding, cut other materials more
widely.
3. The operation interface adopts LCD touch screen, various
rewinding conditions and working conditions can be set directly on
the screen, the control part adopts PLC to control the machine
operation, with self-test system.
4. The machine drive uses AC motor and frequency inverter;
acceleration and deceleration are stable and fast.
5. Optional with slat type air pressure shaft and pneumatic
friction shaft, suitable for more material range, the shaft change
is specially designed, can be change at any time.
6. Auxiliary discharge device, the material outfeed pass surface
impression roll, material more even, and reduce the noise (suitable
for adhesive material)
7. Separate type unwinding stand, for bigger unwinding diameter.
Specification:
| substrate web width | 500-1600mm |
| Substrate diameter | Max ￠1200mm |
| Finished web width | 50-1850mm |
| Finished diameter | ￠450mm-850mm |
| Paper core | 3"-6" |
| Mechanical speed | 0-300m/min |
| Slitting knife | Up down knife/ industrial knife |
HOW THE SLITTING WORKS
There are three general functions that a slitter rewinder performs
in fixed order. To begin the process, the already rolled paper (or
other material) must be unwound to pass through the slitter
rewinder in a single layer. As it passes through the machine, it is
slit by one of a number of different cutting methods into strips of
the desired thickness. Once the material has been slit to the
finished, market-ready dimensions, it is rewound into sellable
rolls.
The actual cutting of the material can be done in a number of
different ways, depending mostly on the material being cut. The
oldest form of cutting, called score cutting, involved slicing the
material between a relatively dull blade and a hard surface. This
method is beneficial for cutting adhesives (like various forms of
tape), especially those with one sticky and one dry side. Although
this method is quick and easy to set up, it is risky to use on many
materials. It can potentially cause an excessive amount of dust
when used with paper, stretching and warping with used with films,
and cracking when used with hard plastics.
The second easiest cutting method to set up is razor blade cutting.
It is also the most economical method. It uses a positioned blade
often suspended over the area through which the sheet is feed. As
the material is pulled across a drum or series of drums, it is
drawn against the blade, which extends downward into either an
empty space or a groove in one of the drums. This method cannot be
used to cut heavy, abrasive, or rigid materials. Additionally, when
used at high speeds, the friction between the blade and the
material can heat the blade, which can cause beading along the
edges of some materials like films.
Shear cutting is the most accurate slitting method, and it can be
used against heavier, thicker, more rigid materials such as thicker
films, foils, papers, and laminates. The defining characteristic of
shearing cutting is that it uses two blades, usually rotating. The
material is pulled between these two blades which cut the materials
from above and below, similar to the way a pair of open scissors
could be guided through paper.
