Winding - Textile Section

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THE WINDING, THE STRIBBING AND THE VAPORIZE .

Winding, clearing and steaming are treated jointly because they make up afterwards spinning, the last three steps before using the yarn in weaving, traditional or knitted.
A regular and accurate execution of these three processes is the prerequisite for a correct one carrying out the subsequent production processes of weaving, dyeing and finishing.

The Winding
The winding operation consists in transferring the yarn from one starting package on tubes or tubes to another type
of package called bobbin, winding the yarn in crossed coils on a rigid cylindrical, conical or super-conical tube.
The shape of the bobbins depends almost exclusively on the machine for which they are intended:
warpers, spoolers, vacuumers, looms with pliers or bullets, for knitting, etc.
Generally:
• for high speed machines bobbins are used
cylindrical or conical to facilitate the unwinding of the yarn,
without causing the wire to slide along the body of the
fortress.
• for lower speed machines, such as machines from
knitting, super-cone-shaped bobbins are adopted, for
avoid slipping of the yarn on the bobbin body in the
unraveling.
For knitting yarns at the same time as winding
a lubrication of the wire is carried out to facilitate its
sliding in the needles of the knitting machines. This
procedure is called paraffin waxing.
machine textile
The clearing
The main purpose of the winding is to pass the yarn from one type of package to another,
but it also has the function of eliminating the defects that the yarn can present. It's about eliminating
sections of thread with defects such as weak or finer points, more or less large flames, bows of fibers,
tangles of yarn, stretches of thread without twisting, stretches of double threads, etc., with as many knot attachments
or with the Splite system. These "repairs" are accepted in subsequent operations on condition
that are not in considerable numbers and that do not affect the regularity of the fabric.
This verification and selection operation is called clearing.
On each head of the winder there is a special electronic device called the clearer,
programmable in its interventions according to the importance of the irregularities that may be
tolerated. The clearer has the purpose of removing the defective part of the thread and of reuniting the two ends of the yarn
with a small knot. Another more advanced knotting system is used when also a
small knot could create problems on the fabric. This system is called Splite and it consists
overlapping the two ends of the thread in the section where the defect was removed. The two leaders come slightly
softened for about 1/2 centimeters and slightly twisted, creating a slight flaming on the thread
or thickened, instead of a knot.
Steaming
The yarns at the end of the spinning come packed in more or less large spindles
depending on the type of machine for row. Due to the twist given at fibers the yarn tends, so more or
less obvious, to tangle if left slow and without tension. This trend increases with increasing
of the twists on the yarn e therefore, to give stability to the body of the
wire, the steaming operation is used.
The process stabilizes the twisted fibers by the combined action of humidity and heat, and takes place
placing the spindles or tubes coming from the spinning mills in baskets or normally metallic cases,
perforated on the sides that are laid down on a trolley for introduction into a special autoclave of which
the duration of the process and the temperature can be programmed. The thermal process takes place by steam
direct and is performed after a vacuum has been created inside the autoclave
of the air, in order to obtain a more effective and capillary treatment.
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