It is evident that the so-called pre-wash and rinse tanks, depending on the position they occupy
in the chain, they do real washing, where the counter-current water can reach a temperature
of about 40/50 ° C in relation to that assumed in the storage tank, which it can reach
98 ° C.
It is useful to know in more detail the process that takes place in the four groups listed above:
pre-wash and rinse tank (fig. A). The fabric, guided by cylinders (fig. A, point 2),
it passes under the nozzles (fig. A, 1) fed in countercurrent by the bath taken from the filter tank.
An excess part of the bath remains wedge-shaped between the fabric and the cylinder (fig. A, 2) and pushed by
the latter penetrates into the pieces during the advancement.
The other part of the excess bath not retained by the fabric is sent into the filter tank by a
conveyor (fig. A, 3).
Subsequently also the other side of the fabric is washed by other nozzles (fig. A, 4) with the same
previously indicated mode (fig. A, 5) and the excess bath pushed by
another conveyor (fig. A, 6) for another filter tank.
A series of controlled small conveyor cylinders (fig. A, 7) carries the piece between two squeezing cylinders
(fig. A, 8), then goes to the tank of the next treatment planned in sequence.
Fabric storage tank (fig. B). In this tank the fabric is subjected to the operation of
soaping with diluted bath with independent recirculation. It can work both in high bath and in
low bathroom. A series of coils (fig. B, 1) on the bottom of the tank heat the bath up to 98 ° C.
The cloth, coming from the previous tank of the machine, passes through the bathroom
a series of dragging and return cylinders (fig. B, 2) where it is soapy.
As it advances, the fabric is kept taut and stretched by a series of cylinders until
reaches the squeezer (fig. B, 3). Then it goes into the tank for the next scheduled treatment.
Fabric impregnation tank (fig. C). When provided, this tank is equipped with coils
bath heater (fig. C, 1) is inserted at the start of the machine.
The fabric, coming from the pallet, passes into the imbibition bath through a cylinder (fig. C, 2)
and, subsequently, above and below the conveyor cylinders (fig. C, 3) where it receives the jet of the
bath through two sprayers or nozzles (fig. C, 4),
then passes through a tensioner / expander (fig. C, 5) and a squeezer assembly (fig. C, 6) placed
outside the machine that conveys the fabric to the next machine in the process.
Fabric cooling tank (fig. D). It is placed at the end of the car and it is
built with a two or three cylinder padder (fig. D, 1) placed outside the machine body.

This section of the process can be used for normal cooling of the fabric
takes place through two water sprayers at room temperature but can also be used for addition
of any auxiliary products that the fabric may need. The other organs of the tank are the same
to those indicated for the impregnation tray (fig. C).
Given the different solutions that this machine allows, the pre-wash and rinse tank (fig.
A) which normally works in countercurrent, can exclude every single tank if it comes
used for independent treatments with different baths. Each tank is also equipped with a pump
of bath recirculation.