Mixing
The
term mixing is applied for combining or blending more than one mass of fibres
into a single homogeneous mass. Since all the natural fibres vary from one
another from region to region, field to field and even from bale to bale, it is
necessary to mix them well so that the final end product i.e. the yarn may be homogeneous and of consistent quality
Various type of mixing
(a) Volume mixing:
Here,
volumetric mixing is performed. Cotton fibres of different quality falls into
the mixing bin & the bins are filled in different volume by pneumatic air. Thus
mixing is done
(b) Weight mixing:
(b) Weight mixing:
In
weight mixing, different quality cotton fibres are weighted at first & then
they
(c)
Hand stack mixing:
This
method is an old type of mixing. Normally used to produce higher count
(d) Bin mixing:
In
bin mixing, cotton flocks are transferred from the bale opener into pipe line pipe
dia is 10" & it passes over the bins, Fibre flocks are delivered into
the bins from the delivery boxes of the pipe placed in the pipe.
(e) Lap mixing:
In
lap mixing, double scutcher is used. One is breaker scutcher & another one
is finisher scutcher. Different grade & different quality laps are produced
in the breaker scutcher. Four lap stands are placed before the finisher
scutcher
Therefore,
mixing can be done different ratio, like, 1/3: 1/1; 3/1: 1/1/2. 2/1/I or
I/1/I/I etc. This method is still used successfully
(f)
Automatic mixing:
(g) Card mixing:
This
mixing is sometime used in the high production carding, where two laps are fed
and mix together
(h) Sliver mixing:
In this method, different carded slivers are
used in a particular ration by doubling to mix the fibre in draw frame
(i)
Mixing by hopper:
In
this method, at first cotton fibres are passed into the bale breaker from where
& mixed together to mix the fibres in draw frame the fibres falls on a
lattice. A series of lattice take the cotton fibres of different quality into
the mixing bins through a cross lattice. As a result mixing of different
quality cotton fibres are performed