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Comb spinning (ring or ring)
This spinning system requires operations that transform the selected part (top) of the wool into yarn,
after the mass of the fibers has been purified of the vegetable parts and have been eliminated, with the
dyeing, short fibers.
Worsted yarns, both in natural and synthetic fibers, are mainly used for
clothing, both traditional and knitted. They are smooth, well regular in the section, rather
I'm cold and free of fluff, since the fibers that make them up are longer than those
used in carded and more parallel yarns.
The preparation for worsted spinning consists of
1. carding, which takes place on so-called comb cards that collect the fleece in ribbons.
This operation eliminates the greatest amount of plant parts, forming a continuous ribbon of
stretched fibers;
2. actual preparation for spinning, consisting of a mixer, a combing machine and
a series of successive passages through comb drawing frames called intersecting, with coupling
you and stretches of various belts, necessary to give them greater regularity and homogeneity.
The belts will finally feed a passage to the finishing bench which produces stop reels-
pines, ready for the transition to actual spinning: ring (fig. 3).
3. Ring spinning or ring spinning it constitutes the last operation of the whole process and it has the purpose
to give twisting and a final draft to the wick, so as to give it the characteristics of resistance
za, elasticity, title and required twists. This can also be done on some
types of wick from the carded spinning process.
3.3 Open end spinning
The open end system (fig. 4) developed in the spinning of cotton-cut fibers. This system carries out the condensation of the fibers using the internal groove placed at the periphery of a small rotor (turbine). On the machine there is a rotor for each yarn head. The previously prepared feed ribbon or wick is disaggregated (frayed) into the individual fibers and reaches the rotor. The fibers have, with the feeding belt, a very low speed which gradually increases undergoing considerable stretching. Upon arrival in the rotor this, with its rapid rotation, subjects the fibers inside it to a high centrifugal force that pushes them towards the peri-
feria where the surface is profiled in a particular way and such as to give the yarn an adequate shape and such as to straighten the fibers. These overlap and condense, abandoning the
throat of the rotor with a certain twist and with a speed much lower than the peripheral speed of the turbine, giving rise to a continuous spinning where the yarn is wound on cones.
3.4 Spinning of chemical fibers (extrusion
The spinning of chemical fibers, whether artificial or synthetic, starts from a polymer (substance of
base) made liquid by solution or melt, which is extruded through a multi-hole die.
The continuous burrs thus obtained are solidified. Wanting to make analogies, we proceed as
for the spider that weaves its web or as the silkworm that produces the thread to create its own
cocoon. The result is a continuous filament that can, if necessary, be cut into a staple for later
be mixed with other fibers of discontinuous length, both in the carded and combed system. Give her
spinnerets you can obtain single filament threads (i.e. consisting of a single filament) or yarns (called multi-filament
burr), twisting several continuous burrs together, depending on the count of the yarn to be reached.
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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