Method of setting and dyeing yarn

A bobbin sleeve for a setting bobbin, consisting of a cylinder jacket bounded on both sides by end flanges and consisting of rigid, more especially metallic material is characterized in that the cylinder jacket is provided with continuous apertures, so that the setting process and a subsequent dyeing process can be carried out on one and the same bobbin sleeve.

FIELD OF THE INVENTION 
The invention relates to a bobbin sleeve for a setting bobbin, consisting 
of a cylinder jacket bounded on both sides by end flanges and made of 
rigid, more especially metallic material. 
BACKGROUND OF THE INVENTION 
For the setting, more especially thermosetting, of threads or yarn it is 
known to use a rigid heat-resistant bobbin sleeve, consisting more 
especially of metal, onto which the yarn is wound in close parallel 
layers. 
The thread tensile forces arising during the thermosetting have to be 
absorbed by the sleeve body. The forces are directed radially towards the 
center of the sleeve. The shaping of a heat- and compression-resistant 
setting sleeve thus differs very severely from a conventional perforated 
dyeing sleeve. The winding diameter has to be very large, in order on the 
one hand to offer sufficient delivery weight for a following process, but 
on the other hand to make the thread layers wound parallel on the body 
non-elastic (non-resilient) relative to the next thread layers wound 
thereabove. Only thus can the shrinkage process succeed whilst maintaining 
the thread length. 
In order to be able to dye the yarn material after the setting, the yarn is 
rewound in a rewinding process into cheese bobbins. The bobbin sleeves 
used for this purpose are provided in the region of the sleeve jacket with 
apertures, in order to allow a dye liquor to flow through the sleeves and 
the yarn package wound thereon from the inside outwardly and/or 
conversely. For this dyeing process, several bobbins are set onto a dye or 
liquor lance and are pressed against one another in the region of the 
front surfaces of the sleeve, in order to be able to allow the dye liquor 
in each case to flow through several bobbin bodies stacked one above the 
other. After conclusion of the dyeing process, the yarn is then dried and 
then rewound in a further rewinding process to form the bobbins intended 
for the end consumption. 
Each rewinding of the yarn causes the yarn or respectively the thread to 
become hairier, which is undesirable for many kinds of yarn, more 
especially for sewing thread. 
OBJECT AND SUMMARY OF THE INVENTION 
The problem underlying the invention is to shape a sleeve in such a way 
that for the carrying out of the setting process and the carrying out of 
the dyeing process a rewinding of the thread or of the yarn can be 
dispensed with. 
To solve this problem the bobbin sleeve in accordance with the invention is 
characterized in that the cylinder jacket of the setting bobbin is 
provided with continuous apertures, in such a way that, for the dyeing 
process following the setting process, the yarn package wound onto the 
setting bobbin sleeve can be flowed through directly from the inside 
outwardly and/or conversely by the dye liquor, without the yarn having to 
be rewound from the setting bobbin to form a dyeing bobbin. 
The edges of the apertures are preferably rounded off or chamfered on the 
outside of the cylinder jacket. In order to be able to treat several 
setting bobbins stacked one above the other jointly in one dyeing stage, 
in which respect it is to be guaranteed that the dye liquor cannot flow 
through between bobbins stacked one above the other by-passing the yarn 
packages, in accordance with the further invention provision is made for 
the fact that the one end flange of the bobbin sleeve is provided at its 
outer front surface with a ring groove and the other end flange is 
provided on its outside with a ring tongue which is complementary to the 
ring groove. In this way, in the case of bobbins stacked one above the 
other, a reliable seal between adjacent bobbin sleeves is ensured, more 
especially if the bobbins or respectively bobbin sleeves stacked one above 
the other are pressed against one another with an adequate force in the 
axial direction. 
The method in accordance with the invention for the setting, more 
especially for the thermosetting, and for the dyeing of yarn can be 
carried out in such a way that the yarn wound onto the bobbin sleeve in 
accordance with the invention is first of all subjected to a setting 
process and then to a dyeing process, or also in such a way that the yarn 
wound onto the bobbin sleeve is first of all subjected to the dyeing 
process and then to the setting treatment. In the case of the second mode 
of precedure the setting treatment, more especially thermosetting 
treatment, at the same time brings about drying of the previously wet-dyed 
material.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT OF THE INVENTION 
FIG. 1 shows a bobbin sleeve in the form of a so-called disc sleeve 1, 
consisting of a cylinder jacket 1.1, two end flanges 1.2 and 1.3 as well 
as hub bodies in the form of centering rings 1.4, 1.5 and hub spokes 1.6 
and 1.7. The upper end flange 1.3 is provide with an annular groove 1.8 
and the lower end flange 1.2 is provided with a ring tongue 1.9 which is 
complementary to the ring groove 1.8. In accordance with FIG. 1 the 
cylinder jacket 1.1 is provided with apertures 2 distributed over its 
circumference. A yarn package 3 is wound in tight parallel layers onto the 
bobbin sleeve 1, in which respect preferably first of all a flexible 
stocking or the like has been drawn onto the cylinder jacket. 
FIG. 2 shows in section the superimposing of several bobbins or 
respectively bobbin sleeves 1 onto a dye or liquor lance 4, which is 
provided with apertures 4.1. The individual bobbins or respectively bobbin 
sleeves 1 are so placed one above the other that in each case the ring 
tongue of the one bobbin enters into the ring groove of the other bobbin, 
in which respect in the appropriate circumstances heat-resistant seals 5 
can be placed inbetween. A closure lid 6 is placed onto the topmost 
bobbin. The securing of the lid 6 is effected by means of a threaded pin 7 
which is positioned at the upper end of the liquor lance 8 and onto which 
a threaded wheel 8 is screwed. 
For the carrying out of the dyeing process the dyeing liquor can flow 
through the yarn packages 3 either from the inside outwardly, by the dye 
liquor being fed through the liquor lance 4 or the dye liquor can flow 
through the yarn packages 3 from the outside inwardly, if the dye liquor 
is supplied at the outside and is led away through the liquor lance 4. 
FIG. 3 shows how a set of several liquor lances 4 can be accommodated 
standing side-by-side parallel to one another in a dyeing tank 9, the 
upper side of which can be closed by means of a lid 10. Suitable 
connection sockets for the liquor lances 4 are positioned inside the 
dyeing vat 9, in order to allow the dye liquor to flow in the one or in 
the other direction through the yarn packages 3. 
The fixing and the dyeing of the yarn can be effected in such a way that 
either first of all the fixing, more especially thermofixing, e.g. by 
means of hot air, and then the dyeing process are carried out, or by first 
of all dyeing being carried out and then, e.g. by means of hot air, fixing 
being carried out. 
The bobbin sleeve 1 can consist of any suitable rigid, preferably 
heat-resistant material, for example of cast aluminum, stainless steel and 
so forth.