Mixing and type of mixing

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:

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:

In this method, cotton fibres are mixed automatically by different automated m/c without breaking bales manually. Here, the number of bales are placed both side of longitudinally. The m/c moves in traversing mo for mixing. For example - unimix of Reiter


(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