Asciugatoi

CONVEYOR DRYERS
L'AFR is the dryer on the well known principle of air percussion.
The air motion causes an ondulation and a simultaneous widening of the knitted, thus allowing the dimensional shrinkage and the selvedge expansion.

It may be used for different kinds of fabrics:

knitted goods (open or tubular);
woven goods (also the heaviest ones);
elastic fabrics;
synthetic, natural or mixed goods.

The fabric travels inside the chamber, between two conveyor belts, and it is normally overfed to allow its length shrinkage. The conveyors are driven and centered by a photocell automatically controlled. The fabric extraction is achieved by means of a plaiter, the speed of which is synchronized with the conveyors.

Every section is modular and fitted with an air recirculation system consisting of 2 motors, 2 impellers and a dual blower with special air blades, removable for cleaning and maintenance, and an exhausted air control for a better heat performance.
Temperature adjustment is independent on every drying section.

Air heating is achieved by means of steam or thermo oil radiators; the machine may be alternatively equipped with direct gas burner.
The dryer may have a single or a double passage.

Every dryer is fitted with an electrical board managing all the master controls, including a supervising PLC and a panel to set speed, overfeeding, temperatures of the single sections, fan oprations.

SPECIFICATIONS
	model	1S	2S	3S	2D	3D
Standard roller width	cm	220-260-300
Working speed	m/min	2,5-25	2,5-25	4-40	4-40	6-60
Working temperature up to	°C	180
Evaporation capacity	kg/h	300	600	900	1200	1800
Air recirculation	m³/h	65.000	130.000	195.000	175.000	260.000
Installed power heat	kcal/h	300.000	600.000	900.000	1.200.000	1.800.000
Installed electric power	kW	50	80	115	150	200
Length L	mm	9.400	12.700	16.000	13.800	16.950
Width B	mm	R.W. + 3800			R.W. + 4600
Height H	mm	3000			3900

THE REASONS OF THIS CHOICE

UPPER SECTION:
air is heated also in this area.
In this way it is assured a better performance of the machine which duplicates the fabric content and consequently to use better the machine and the installed/used calories.
This longer treatment time must be added to the drying time increase given by the 3,2 mt new chamber.

LOWER SECTION:
the fabric drying and shrinkage take place basically in this area, where 2 conveyors, air blades and chamber. Shrinkage is assured by a special adjustable airflow.

Each section is equipped with two motorfans, at variable speed, controlled by inverters in order to:

improve hot air distribution;
make temperature uniform;
increase productivity.

The new AFR has new drying sections 3,2 mt long versus traditional 2 mt length. Drying time is so 60% longer and production speed is therefore increased by the same ratio.

The air speed can exceed 30 mt/sec and the special design of the ducts reduces to the minimum the loading loss.

MODULARITY:
every section is 3,2 mt long and contains 32 air blades, 16 over and 16 below the fabric.
The blades are properly designed and realized to improve the air blades assure a perpendicular flow to the fabric cloth.

MAINTENANCE:
filters and blades are easily detachable for cleaning which is frequently necessary above all with cotton fabric.
Ease of entry reduces time of maintenance in a significant way.