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Dehairer DEHAIRING

The dehairing process is the separation of fine down fibers from the coarse strong fibers called guard hairs.

Some fibers (like cachemire, camel, buffalo) need to be dehaired to get out the guard hairs that make the product too coarse to wear.
Usually the dehairing is accomplished by a modified carding process, employing breaking, cutting, blowing and suction devices.
By providing different and varying rotational speeds, the dehairing unit transfers the fibers between the cylinders for dehairing by forces, including centrifugal force.



COMPACT DEHAIRER Fiber separator


To offer a complete line of textile machinery, Ramella created a compact dehairer suitable for minimills.
This machine consists of a solid structure on which are mounted high speed cylinders for the separation of the fibers.

In the front part of the dehairer there is a feeding table and a solid input unit that opens the fibers.
In the central part there are the two high speed cylinders that separate the guard hairs from the finest fibers
The machine ends with a doffer roller and a fly comb that store the fibers into a container.
In the lower part of the dehairer there is a mobile table that collects all the impurities and the guard hairs and conveys them towards the front of the machine.


HIGH SPEED ROLLERS AND DOUBLE EXIT Machine rollers

For greater effectiveness in the separation of the fibers, it is necessary that between the rotating cylinders there is a large variation of speed.
For this reason, the dehairer Ramella has a pair of high-speed separators cylinders that expels by means of the centrifugal force the heavier fibers.
These cylinders are wired with a rigid card clothing designed to expel the guard hairs.

Even the less valuable fibers can be used to create felts or pads so they are not discarded but conveyed in the front part of the machine with a driven table.
Without the need for any manual collection all the fibers are deposited in an easily removable container.
In the rear part of the dehairer there is a stainless steel sheet and an air flow that convey the fine fibers in a second container


HIGH RANGE OF WORKABLE FIBERS Workable fibers

The configuration of the dehairer, the use of special card clothings and the control of the speed allow you to work with many different fibers.
During our tests we processed successfully cashmere, alpaca, buffalo, llama, qiviut, etc.

With multiple passes fibers are cleaned with more precision and other than the guard hairs the dehairer also removes dust and vegetable matter.
Thanks to two large side openings you can observe the action of the machine and check the impurities removed.




INDEPENDENT MOTORS DRIVEN BY INVERTERS Control panel

The dehairer is driven by 4 independent motors that are electronically controlled by inverters.
With this configuration, it is possible to change the speed of the rollers in a simple and immediate way.

Electronic devices are contained in an electric panel with ventilation filtered to protect sensitive electronic parts.
Outside of the panel are positioned the control knobs and speeds are displayed on large displays.
Two button panels located on both sides of the dehairer allow a simple starting and stopping of the machine.


ALUMINUM PROTECTIVE STRUCTURE Safety cage

For maximum safety, our dehairer is fully protected by an external cage made of aluminum.
This structure consists of 5 panels that can be removed with the appropriate key.
The choice of anodized aluminum was made to allow greater lightness of the removable panels, and to ensure a shiny appearance over time.

These protections are available in two versions: protective mesh made of galvanized steel or transparent polycarbonate panels.
Both versions allow a wide view and the complete control of the dehairer during the process.


HIGH-SPEED FLY COMB High speed comb

The dehairer is equipped with a high-speed fly comb that removes the fibers from the doffer roller.
The structure of the fly comb is balanced so as to reduce the vibrations and minimize the consumption of bearings.

The lever control allows an easy adjustment and a quick maintenance of the blade.
The fly comb is mounted on oscillating bearings with seals that can be easily lubricated, 4 screws allow to position it accurately compared to the doffer.
The blade of the fly comb is connected to the structure by many screws covered with tin, this allows a perfectly smooth surface that prevents the fibers to stop.


Dehairer from side WHAT MAKES THE DIFFERENCE

As previously noted the dehairing process is similar in some aspects to the carding.
Ramella has used its experience in the carding machines to create a dehairer with similar characteristics:

An extremely solid and stable structure, made to resist in time .
The components machined for maximum precision and quality in the final product.
The cylinders are driven independently by 4 motors with electronic speed control .
The rigid card clothing that allows a quick cleaning and to last long.
All cylinders mounted on ball bearings, no bushings.
A modern design created to meet the needs of minimills and laboratories.



SOLID STRUCTURE - ALL MACHINED PARTS Machine structure

As well as in the carder even in the dehairer two factors are critical: the solidity of the structure and the precision of the mechanical parts.
The solidity is involved in reducing vibrations and forces that are generated during the process.
The accuracy of the rotating parts and the supports allows you to maintain a constant distance between the rollers by determining the quality of the final product.

The dehairer Ramella is characterized by a steel frame 4 cm (1.6'') thick fully machined, this structure is connected by solid steel crossbeams.
This structure is approximately 10 times stronger than one formed from welded tubes.
All the rotating parts are equipped with micro adjustment of the position and locking screw.
All surfaces are painted or chemically treated to last long.


CAD DESIGN - INDUSTRIAL MANUFACTURING CAD design

Every single detail of the dehairer Ramella has been designed using modern 3D CAD.
All components have been designed to obtain a high-performance machine with an excellent quality/price ratio.
Even the electric panel has been designed to make the use of the picker simple and intuitive.

For the production of components are used CNC lathes, milling machines and modern laser cuts.
The steel used is of premium quality and all the commercial components come from suppliers with well-known brands.


PRODUCT SPECIFICATIONS Product specifications

Electric specifications:

Power consumption: 3.8 kW
Single phase 230V 50/60Hz

Size (length x width x height):

2770 mm x 1630 mm x 2000 mm (109'' x 64'' x 79'')

Download layout (pdf version)


DEMONSTRATION VIDEO

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