gui tide cable: wire and cable manufacturing process
from：guichao author：admin click： 476 addtime：2017-06-04 16:59:18
wire and cable wire drawing process is as follows: - - insulation - spark coil
- cable (steel band) - sheath - withstand voltage test - finished packaging
1. wire drawing
generally, the incoming copper rods are 7.00-8.00mm,
there is even a molding drawing machine drawing annealing wire drawing machine,
the wire drawing machine is also drawn and then annealed separately,
now the drawing machine is basically formed at one time.
the drawing order of drawing dies is:
7.00-6.55-5.39-4.49-3.43-2.76-2.56-2.26-2.10-1.78.
this set of matching dies is the most efficient, if you want to pull the intermediate model,
just change the sizing die.
wire drawing machine and annealing wheel are required to draw oil, to prevent wire breaking and oxidation.
2. skein
pull the thread of the wire onto the cage. the cage is usually divided into four sections,
are 8 12 16 25 (frame winch), some tight die (round),
some are pressing die (fan-shaped, tile type)
3. insulation
the insulation is pvc insulated and xlpe insulated.
pvc insulation colors are deployed, and can be directly out of insulation.
xlpe color is milky white, with adjustable color masterbatch.
here is the quality control point.
4. spark
there is a break in case of insulation,
therefore, there is a spark machine in order to check the quality of the cable.
if there is a break, it can be found repaired in time.
5. cables
a good insulated wire core is twisted together,
the circular insulated core is not considered for the transition,
only a few cores are left to fill in some space,
round the finished half of a strand.
transition problems should be considered in compression type insulated core,
the twisted wire cores must be made in accordance with the specified shape so that they can be rounded.
without a coat, you can only wrap one layer of pp.
if you want to tie the steel belt, you need to wrap a plastic band, and then tie the steel belt, but one process is done.
6. sheath
fill the hopper with pvc sheathing material,
press the fuselage to warm up at the right temperature,
the finished product will cool down and spray the upper axis.
7. withstand voltage test
low voltage withstand test is to use 3.5kv voltage, suppress 5 minutes.
8. finished packing
the two did not play good pressure finished jacket sawed off, head,
let's tie up the head and seal the cloth,
put the pressure test certificate to the side of the axle.
one axle low voltage power cable is so fresh