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Recent Articles
- Rolling Page 61 24/06/2022
- Checking the finished fabric Page 60 13/06/2022
- The Airo Treatment Page 59 06/06/2022
- Brushing Page 58 26/05/2022
- Mercerization Page 57 25/05/2022
- Sodium plating and bleaching Pag. 56 20/05/2022
Mission and Vision
Looking for the best opportunities to satisfy the customer:
Info
Mobile Phone: +393319020189
Timetables
Working hours: 09.30 / 12.30 - 16.00 / 18.00 From Monday to Friday.
Purpose of processing
Fabric drying is normally required after wet processing (washing, bleaching, dyeing,
printing, impregnation with chemical solutions, sizing, etc.). In the machine named
ramosa or rameuse is carried out by hitting the piece with a flow of hot air.
Flat twigs are less effective and are used on light and knitted fabrics, those with multiple paths
horizontal, with inlet at the top and outlet at the bottom on the same side, are preferred for fabrics
of wool and drapery in general.
Steam, diathermic oil and combustion can be used to heat the air
direct gas. The last two systems are indispensable in the presence of a section for heat setting
in which very high temperatures must be reached.
Processing technology
The fabric circulates on the various levels of the machine (four or more, depending on the capacity) through two
continuous chains (see figure A, point 1), on the links of which metal plates with
stainless steel pins on which the selvedges are pinned, held flattened by two or three small cylinders
move unwinders, independently controlled. There are two arms outside the machine (fig.
A, 2) - within which the continuous chains run - equipped with electronic feelers to ensure correctness
positioning of pins and selvedges, which, once pinned, support the spreading effort
of the fabric.
The fabric passes between two overlapping pulleys on each side (fig. A, 3) which push it allowing you to
supercharge it with respect to the path of the chains to obtain, if necessary, a greater re-entry into the
sense of length. A brush (fig. A, 4) forces the fabric to penetrate with its own weight
deeply from the pins, so that the ventilation does not cause the detachment and the consequent
automatic machine stop. A velvet brush is placed before the move unwinders
(fig. A, 5), which smoothes and parallelizes the fibers, almost always preceded by a weft straightener
(fig. A, 6) which guarantees straight thread wefts and well square designs.
The fabric descends into the drying chamber from the top and exits at the bottom, dry and cooled
by a perforated cylinder (fig. A, 7) equipped with an aspirator, ready to be folded or rolled up
according to the requirements.
Keep it going
Finned radiators placed on the walls in each of the two semi vertical sections (fig. A, 8) generate the
necessary heat and two fans and some blowers (fig. A, 9) convey the air onto the fabric, in the
first half section (fig. A, a), from bottom to top and in the second half section (fig. A, b), from top
downwards, to obtain perfect drying over the entire height of the fabric.
The hot air, saturated with the humidity of the fabric, is let out through special suction ducts (fig.
A, 10) equipped with adjustable valves, while thermal insulation panels on the surface of the machine avoid
heat dispersion.
At the bottom of the slide rails, the two gears driving the chains are connected in parallel by
a shaft covered by a cylinder with three periscope elements (fig. A, 11), which varies the width of the
field of work.
The machine can have automatic systems that set the optimal speed, based on the humidity of the
patches.
Some types of fabrics need to be wet or need to be soaked with certain products
before being dried. For this reason, a squeezer (scarf) is mounted at the entrance
of the ramosa.
Execution of processing
The quality of the processing depends on the loading of the pieces on the machine and on the correct one
programming through the control panel. The ramosaio must:
sew the pieces in the head-tail and place them in the center of the machine;
make sure that the piece is presented in the right direction at the entrance, even with the weft straightening device;
make sure that the difference in height between the wet and dry fabric is not excessive
to cause the fabric to break at the selvedges and stop the machine.
In this case it is necessary to allow the multi-level branch to cool down to enter and eliminate the stuck tissue
on chain guide and other organs;
avoid that the height of the incoming wet pieces is too much higher than the drying height
in this case the action of the fans can detach the selvedges from the points of the chain
(where there are no stop pliers);
make sure, at the exit of the fabric, that the fabric is not too dry nor too wet;
check the lubrication of the chain and the regular operation of the fans and the exhauster
(the latter to avoid condensation dripping on the fabric and consequent stains).
Most recurring defects
Outgoing fabric that is too dry or still damp can cause defects in subsequent finishing.
Breaks or tears near the selvedges.
Condensation or fluff oil stains soaked in the chain lubricating oil.
Lack of the right thread on the fabric.
Horizontal stripes at regular distances, due to excessive permanence of the piece on the machine
in contact with the periscope cylinders.
Uneven drying between the center and sides of the patch.
Labor management
The coppersmith must organize and manage the work to optimize production both in terms of quality and quantity of fabric processed.
In particular, he must check the correct operation of the machine, carry out daily maintenance and carry out a very thorough weekly cleaning when the machine is cold (usually on Mondays).
Services
After the sale of the machinery we also assist you in logistics and if desired by the customer we have technicians capable of reassembling and starting the machinery.
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