Wire
coating line is machine for coating low carbon galvanized steel
wire by polyethylene or PVC sheath. Its role is to further protect
the final product from atmospheric influences, as well as to
further improve the wire mesh, giving it the ability to be made in
several colors. This produces better competitiveness, as well as
further fulfillment of the specific requirements of customers,
which are increasingly demanding.
Wire coating line consists of the
following elements:
1. Wire take up with
rollers
Wire
take up with rollers for straightening the wire, while its sensor
stops the line if the wire jams. Wire coating line is fully
automatic with a minimal participation of the operator, so, while
the line is working, an operator may perform other tasks, such as
the operating other machine e.g. for making wire mesh. As mentioned
before, if the wire jams, the machine will automatically stop until
the operator fixes the problem and resets the line. Rollers for
wire straightening are also used to carry out the tightening and
flattening of the wire before it enters the extruder
head.
2. Extruder for
plasticization
Extruder for plasticization has the following
major components: 5.5 kW drive motor with corresponding reduction
gear, screw and cylinder (diameter ɸ*0mm length ***0mm), five
heaters of total power of 8kW, head for lamination with
interchangeable pins and bushings. The construction of the extruder
is made robust and designed to operate non-stop, ie. for continuous
work *4 hours a day. As with any extruder, the largest energy
losses are during the start-up and shutdown, so the greatest
productivity is achieved if it runs continuously. Practice has
shown that our extruder very well performed in highly loaded
conditions, during continuous operation over a period of **0
days.
3. Electrical cabinet
Electrical cabinet is equipped with adequate
temperature and frequency regulators which control the speed (RPM)
of the extruder as well as the speed of winder, which in return
adjusts the speed of operation of production line and the thickness
of the polymer coating on the wire. Turning the heater ON is performed via the SSR
relays that perform heater activation in soft contact, without
sudden power surges in electrical network. This ensures a longer
service life of heaters and finer control of the set temperature,
which influences the quality of the final product. Frequency
regulators continuously adjust engine angular speed and have a
protective role (protect motors from
overload).
4. Stainless steel cooling
bath
Stainless steel cooling bath consists of **0
liters water tank and delivery pump. On the bath, there are
installed thermometer and level gauge, so that at any time, the
level and temperature of the water in the tank are under
control.
5. Wire coiler
Wire
coiler has two interchangeable mandrels. These mandrels can be
changed without stopping the line, so the production process is
very simple and continual. Every mandrel has a special trolley with
wheels which enables easy and simple replacement. It is possible to
order additional mandrels for the coiler which prevents later
repacking of wires, as it is possible to install mandrel from
coiler directly to the wire mesh machine. Soft packaging makes it
easier for the wire coil to unwind and less tangling problems while
knitting. Also the coil can be easily divided into smaller parts
for resale (such as tensile wire that has a larger diameter and
that always goes with the wire mesh).
General specifications of the Wire
coating line:
Screw diameter: *0
L/D ratio: *8
Nitrated layer depth: 0,**0,6
mm
Nitrated layer hardness: ****5
HRC
Heating Zone: 3*2 (cilindar + T
glava)
Power heater: 3x2kW, 1x1,6kW,
1x0,5kW
Heating zones: 5
Extruder drive unit: AC motor, power 5.5 kW,
connected to the corresponding reduction gear, speed control by
frequency inverter
Winder drive unit: AC motor , power 1.5 kW,
connected to the corresponding reduction gear, speed control by
frequency inverter
