Hello friend
, how are you. Today is very cold here, hope you are enjoying the winter.
Today’s
post is different from other post, Actually my father has started a business,
making plastic bags from plastic sheet, but he is facing a problem to cut the
sized piece of sheet from the role.
He asked me
to find out a solution, then I thought and find out the solution in this way…………………
I heated a
nichrome wire with electric . and as soon as the plastic sheet is placed on
red-hot nichrome wire it melted and cut,
So, now I am
going to discuss step by step, how I did this
What we
need- a piece of 22 gauge nichrome wire, a 24 volt step down transformer , a
MCB, some wires
A little
calculation- if we take nichrome A ( 80% ni, 20%cr) of 22 gauge, it has the
resistance 1 ohm/feet, if we take 5 feet of nichrome it has 5ohm resistance. As
the transformer output is 24 volt then the current in secondary winding will be
near 5 amp, for long life of transformer we take it 6 amp, then the transformer
rating must be 24*6=144 VA, nearly 150 VA, here we use a mcb for safety it must be of 6 amp,
connected in series in output,
Mechanical mechanism-
as we all know the length of the wire increases as the temperature increases,
so here we used a spring to keep the wire straight. Look the picture carefully,
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