1. The composition of the paper cutter
The parts of the paper cutter are mainly
divided into several types, such as workbench, paper pusher, paper press, paper
cutter blade and cutter pad.
Among them, the function of the workbench
is paper feeding and discharging. In order to reduce the frictional resistance
between the paper and the workbench, we generally carry out some special treatments
on the surface of the platform to reduce friction. When the paper cutter is
working, the left and right wall panels and the paper pusher must form a 90° angle with the platform to ensure that the size of the paper cut
each time is consistent. In order to ensure the precision of the cut, the paper
press plays a decisive role. Generally speaking, the greater the pressure of
the paper press, the more it can prevent the paper from affecting the cutting
accuracy due to deformation. The paper press can be divided into screw
structure, spring structure and hydraulic structure. Among them, the hydraulic
structure of the paper press has a wide range of use and a high utilization
rate, mainly because the pressure is uniform and sufficient, and can be easily
adjusted and controlled.
The working principle of the hydraulic
paper press is as follows: the oil pump presses the oil in the oil tank into
the cylinder to push up the piston and then pushes the push lever. The force of
the push rod pushes the paper press down, and the pressure is adjusted by the
overflow valve. The excess oil returns to the cylinder through the overflow
valve.
2. Types
1． Sheet paper cutting machine is a kind of cutting machine with a wide
range of applications and can be used to cut paper, leather, plastic, cardboard
and other materials. The paper cutter is mainly composed of a main machine
(also called a gantry), a workbench, a paper pushing mechanism, a paper
pressing mechanism, and a cutting mechanism. The paper pushing mechanism is
used to push the paper for positioning and fixing, and the paper pressing
mechanism compresses the positioned paper to ensure that the original
positioning accuracy is not damaged during the cutting process. The cutting
mechanism is used to cut paper, the side baffle is used as a side stop gauge,
and the workbench plays a supporting role.
In the production of printing, packaging,
book binding, etc. , from cutting materials to printed finished products and
after binding, the cutting of the raw material requires a paper cutter to cut,
so the paper cutter is an important equipment for post-press processing. Sheet
paper cutting machines are widely used in printing plants, binding plants,
packaging plants, paper products processing plants, etc.
Cutting process of sheet paper cutting
machine:
1) Determine the position of the paper pusher according to the size of
the cut paper.
2) Make the aligned paper close to the front surface of the pusher and
the side fences for paper positioning.
3) The paper presser first descends and presses the paper, and then the
cutter descends to cut the paper.
4) After cutting, the cutter leaves the paper stack and returns, and
then the paper presser rises to reset.
2． From the way of controlling the movement of the paper pusher, it is
divided into three ways: stepper motor control, frequency conversion speed
control, and AC servo control.
The stepping motor control and frequency
conversion speed regulation control method can reach ±0. 1mm on the positioning accuracy of the paper cutter pusher, and
the speed can reach 8-14 m/min (the specific accuracy and speed achieved are
based on the manufacturer's Control system and electrical components. Different
control systems and electrical components will make a big difference in
accuracy and speed). However, the stepper motor control method is noisy when
starting, which is not favored by many paper cutter manufacturers and paper
cutter users.
The AC servo control mode has a great
breakthrough in the positioning accuracy and speed of the paper cutter and the
paper pusher than the frequency conversion speed control. The positioning
accuracy can reach ±0. 025-±0. 015mm, and the paper pushing speed can reach 16-20 meters per
minute (the specific accuracy and speed achieved will vary greatly depending on
the control system used by the manufacturer and the electrical components
selected).
3． From the operation interface (operation mode) of the
program-controlled paper cutter, it is divided into three modes: button mode,
touch screen, button and touch screen dual modes.
Program-controlled paper cutters operated
by keystrokes were the first to appear, and the efficiency of digital paper
cutters was doubled. It has improved work efficiency for many users and created
more wealth, which is favored by customers. However, after the emergence of new
technologies, this method cannot be compared with the touch screen operation
method in terms of intuitive and simple operation.
The operation mode of the touch screen can
easily realize functions such as equal division, equidistance, loop size,
calculator use and calculation result input program. The operation is simple
and intuitive (the button-type operation requires a combination of several keys
to perform certain functions. Many customers consult the manufacturer for the
method of use because they change the operator but cannot find the manual). The
screen has a visual display of the detection switch status of each running link
on the machine, which provides great convenience for the troubleshooting of
common faults, and saves time and money for both customers and manufacturers of
paper cutters.
3. Control program
1． Adopt Coolmay PLC all-in-one as the core control. The following
picture shows the PLC control program
2． Distribution box and site pictures
