FR2486974A1 - Spool carrier for autoclave dyeing of yarn packages - grips columns of spools between upper and lower plates - Google Patents

Abstract

Yarn packages for high-pressure dyeing are wound on moulded, perforated tubes of cylindrical-conical form which can be stacked on top of each other. A carrier for the yarn packages comprises a support plate having a central pillar for handling purposes, and having an array of locating pegs to hold the bottom end of a column of yarn packages. A cover plate which locks onto the upper end of the central pillar carries a similar array of pegs to secure the upper ends of the columns, which are surrounded by spring-loaded caps to consolidate the column of yarn cakes wound on the tubes. This arrangement dispenses with full-length supports for each column of packages, resulting in economy of materials and facilitating the liquor flow. After dyeing, the load is quickly discharged by inverting the carrier after removing the cover plate. The spring-caps compress each yarn column uniformly, improving dye levelness even with short liquor ratios.

Description

Technical area.

 The present invention relates to improvements in bobbin holders or dye tubes on which the crossed threads are wound to form wafers intended to be placed in a dye autoclave, in particular in a short bath, where the bath is recycled by pumps, said baths bobbins being of the molded, perforated, cylindrical-conical type, with embedding of the small diameter end in the large diameter end of the superimposed bobbin, the bobbin holder being made up of a lower plate resting on the bottom of the autoclave on which columns of spools of threads are stacked, - an axial tube intended, in particular, for handling the bobbin holder, - and a removable means for retaining and elastic pressing of the upper part of the columns or stacks of spools of threads.

Problem.

 It staglt to maintain the columns or stacks of spools of thread on the bobbin holder inside the autoclave without interfering with the penetration of the dye bath to obtain a uniform coloring of all the threads.

State of the prior art and drawbacks.

 For a long time, the wire has been wound on conical bobbins, crossing the turns so that the wire wafer is stable and the blanks do not fall.

To dye the bobbins, they are stacked in columns which are arranged on material holders or bobbin holders made up of an axial tube supporting a lower plate which is bristling with pins on which the bobbins are threaded so that the pin passes to through the coils.

Sometimes separations are inserted between each coil.

 The stack or column is packed more or less strongly to homogenize the consistency of each coil.

It is indeed necessary to have a uniform compaction so that the dye bath uniformly crosses each spool of thread and uniformly dyes each fiber. This packing is often done by special presses which act separately on each of the columns. When packing is carried out, a cover is placed at the top of each spindle, a cover which snaps into place with an elastic clamping device. The pressure force depends on the material and the nature of the work. There are a large number of models of removable covers.

 In any case, this pressing work requires transport of the material carrier and generally a press.

The spindle cover requires a special operation.

 The material carrier being filled, it is placed in the autoclaye for the dyeing operation.

 In this state of the art, the homogeneity of the dye is not always correct when working in a short bath because the pressure is not always the same in each column.

 When the dyeing is finished, remove the material holder from the autoclave and remove each cover from each of the pins. I1 must then manually remove all the coils from each of these pins and possibly the separations. Indeed, it is not possible to overturn the material carrier to cause the coils to fall because the weight of these on the pins fixed in overhang on the lower plate of the material carrier could deteriorate it and even tear off the pins from their fixing.

 The present invention is intended to remedy these drawbacks, that is to say to eliminate dead time and to facilitate loading and unloading operations.

 In the state of the art, it should be added that it has recently appeared on the market of new bobbins made of molded material allowing efficient fitting into one another. The present invention preferably provides for using this kind of bobbins, but this is not exclusive since it can also use the old conical bobbins.

Statement of the invention.

The present invention is mainly characterized by the fact that each stack or column of spool of wire is held a) at its lower part, by a pin or lug, fixed on the lower plate, with a free end of reduced cross section, with a lower height to that of a bobbin designed not to hinder the circulation of the bath towards the wire and to block the lower spool of the column by entering the corresponding bobbin, b) at its upper part; by a set consisting of - a pin or similar lug,
having the same forms and functions,
being hung on an upper cover, parallel to the
lower plate, by a vertical sliding rod
in a hole in the cover following a limited stroke,
- and a hat,
whose bottom is integral with the base of the spindle or
lug,
which is concentric with this one,
which is intended to cover the coil of the upper coil
column column,
and whose edge, in the form of a flat crown, is intended
to lean on the upper side of the wafer
of the upper coil under the effect of a spring
pressure acting on the lug-cap assembly, inter
placed between the hat and the upper cover, guided
by the vertical sliding rod,
the horizontal cover attaching and locking in a fixed angular position on the top of the axial tube secured to the lower plate, said cover having a latching device when it is lowered onto the top of the axial tube.

The bobbin fixing pins or pins
either have a star section or a tubular section with a perforated wall.

 Other characteristics and advantages of the invention will appear in the description below which gives a non-limiting example of practical implementation.

Solution to the problem, advantages and industrial result.

 The first advantage of the bobbin holder of the invention results from the absence of very long pins.

 I1 results, not only a saving of material but a better circulation of the dye bath and especially the possibility of discharging the coils by simple tumbling of the material holder after removing the upper cover.

 A second advantage of the material carrier of the invention is that the stacks or columns of spool are pressed at once with caps having distributing springs which standardize the pressures in each column. In addition to saving time, we thus obtain a uniform pressure and a great homogeneity of the tightening of the threads which ensures a great homogeneity of the dye in short bath since we balance the densities of the different columns and the different coils in each of the columns .

 It should be noted that the material carrier of the invention can be used for all fibers.

 It can also be noted that loading is also facilitated by the absence of pins making the entire height of the column.

 The following description is illustrated by the accompanying drawings.

Brief description of the figures.

 the. Figure 1 is a schematic vertical sectional view of a dye autoclave containing the bobbin holder of the invention.

 Figure 2 is a detailed view of the fixing of the spindle or lug on the lower plate.

 Figure 3 is a partial axial vertical section of the upper part of the material holder showing the axial tube, the upper cover with its latching device and the pins with the pressing caps.

Description of an embodiment.

 hn referring to FIG. 1, there is shown the bobbin holder or tube 1 in an autoclave 2. Its lower plate 3 rests at the bottom of the autoclave 2 by means of a support 4.

 The bobbin holder 1 further comprises an axial tube 5. All of the above is conventional and does not form part of the invention.

 The invention provides for maintaining the stacks or columns 6 of spools of wire 7 by a small pin 8 or lug, fixed on the lower plate 3 and another small similar pin 9, placed at the top of the stack 6 and secured to '' a cover 10.

 The free end li or 12 of the pins 8 and 9 has a reduced section to facilitate the placement of the coils. The height of the pins 8 or 9 is less than that of a bobbin 13. The section of the pins 8 or 9 is such that it cannot hinder the circulation of the dye bath inside the bobbins 13 and, for this, it is either star-shaped or it is tubular but then it has holes. This section is slightly smaller than that of the interior of the bobbins 13 so that one can, of course, thread them above.

 As can clearly be seen in Figures 2 and 3, the coils 13 are cylindrical-conical and interlock with one another since the small diameter end of these can be introduced into the large end diameter of the superimposed bobbin.

 We will now describe in greater detail the upper part of the bobbin holder with the cover 10 which supports the spindle 9 and which is shown in enlarged form in FIG. 3.

 The cover 10 comprises an annular disc 14 having a central hole 15 making it possible to pass it around the axial tube 5. The disc 14 is stiffened by ribs such as 16.

 In its central part, it has a latching device in cells 17, 18 provided in the upper part of the axial tube 5. Several series of cells 17, 18 can be provided (not shown) exactly one below the others on tube 5.

This latching device generally identified by 19 is placed in a botter 20 projecting from the underside of the central part of the cover 10. It contains a pawl 21 articulated on an axis 22 and pushed back towards the axial tube 5 by a helical spring 23. The spring 23 is held in place by a cup 24 fixed to the housing 20 and a cup 25 fixed to the pawl 21. Said pawl comprises a stop 26 resting on a counter-stop 27 integral with a rib 16. The pawl 21 further includes a flange 28 intended to engage in the cells such as 17 or 18.

 When the cover 10 is above the axial tube 5 and it is lowered, the chin 28 is first above the cell 17. When it approaches the edge of the cell 17, its ramp 29 forces it to fade in the direction of arrow 30 by compressing the spring 23. When the flange 28 is facing the socket 17, it enters under the force of the spring 29 and it thus prevents any rise of the cover 10. If the stacks 6 of coils 7 are less high or settle under the vertical force exerted on the cover 10, the latter can descend more and the studs 28 snap into the series of lower cells (not represented).

 To carry out the reverse operation, it is necessary to release the pawl 21 by making it move again in the direction of arrow 30 to extract the chin 28 from the socket 17. To achieve this, a release lever 31 is provided which is articulated on the pawl 21 and 32 and which can bear on the lower edge of the counter-stop 27. When the lever 31 is maneuvered in the direction of the arrow 33, the pawl 21 and the flange 28 are moved back to release the latter from the socket 17 and allow the cover 10 to be released.

 The small pins 9 are connected to the upper cover 10 by a vertical rod 34 sliding in a hole 35 in the cover in a race limited downwards by a pin 36 transversely crossing the top of the rod 34, pin which rests on a washer 37.

The small pin 9 is surrounded by a cap 38, the bottom 39 of which is integral with the base of the pin 9. The cap is concentric with this pin and it is intended to cover the bobbin 13 of the upper coil
s from the coil column. Its edge 40, in the form of a flat crown, is intended to rest on the upper blank of the wafer of the upper spool. The force of application of the edge 40 on the spool of wire is standardized by a helical spring 41 concentric with the rod 34.

 The autoclave 2 comprises an axial threaded rod 42 which cooperates with a nut 43 controlled by a handle 44 used to fix the bobbin holder during the dyeing operation.

 The bobbin holder 1 is designed to have a large number of columns of bobbins of threads distributed over several concentric rows. It is for this reason that in FIG. 3 a second cap 401 is shown, for information only. There is also a corresponding number of small pins 8 and 9.

 To use the device, the bobbin holder 1 is used, obviously removed from the autoclave 2, and stripped of its cover 10. The stacks of thread spools are stacked above each of the small pins 8 according to a suitable and uniform height which is provided to ensure the corresponding tightening. The cover 10 is then brought coaxially to the tube 5 and it is lowered by orienting it so that the jaws of the pawls 21 engage in their corresponding cells 17.

In this position, a small pin 9 is arranged exactly in the axis of a corresponding small pin 8.

All the pins 9 therefore engage in the upper coils 13 of each of the columns and the 3d caps cover the outside of each of said coils 13. The shape of the caps 38 is provided to facilitate this guiding.

When the cover 10 continues to be lowered, the edges 40, 401 are supported almost simultaneously on the upper blanks of each of the wafers above each column and a regular force is applied to them thanks to the action of the springs 41 which are compressed as the cover 10 descends until the pawls 21 engage. The springs 41 are more or less compressed depending on the lifting of the caps as a function of the thickness differences of each of the coils. The bobbin holder is then gripped by the gripping means 44 and placed in the autoclave 2 to carry out the dyeing operation.

 Once this has been completed, the bobbin holder is removed after having unscrewed the nut 43 using the handle 44 and the studs 28 are released from the cells 17, 18 by action on the release levers 31 according to arrow 33.

The cover 10 then jumps out and can be removed by releasing the small pins 9 and the caps 38 from the coils 13 from the upper coils of each column. He remains. then to overturn these columns by simple lateral pouring of the bobbin holder.

Claims (7)

 1. Improvements to bobbin holders 1 or dye tubes on which the crossed threads are wound to form wafers intended to be placed in a dye autoclave 2, in particular in a short bath, where the bath is recycled by pumps, said bobbins being of the type in molded material, perforated, cylindrical-conical, with interlocking of the end of small diameter in the end of large diameter of the superimposed bobbin, the bobbin holder consisting of - a lower plate 3 resting on the bottom of lssa, utoclave 2 on which columns of spools of threads are stacked, - an axial tube 5 intended, in particular, for handling the bobbin holder, - and a removable means for holding and pressing elastic of the upper part of the columns or stacks of spools of thread, characterized in that each stack or column of spools of thread is held a) at its lower part, by a pin or lug 8, fixed on the lower plate3, to end free mite of reduced section, of a height less than that of a spool, designed not to hinder the circulation of the bath towards the wire and to block the lower spool of the column by entering the corresponding spool, b) at its upper part, by a set composed of - a pin or similar pin 9,  having the same forms and functions,  being attached to an upper cover 10, parallel  to the lower plate, by a vertical rod 34 grout  sant in a hole in the cover following a limited stroke, - and a cap 38,  whose bottom is integral with the base of the spindle or  lug 9,  which is concentric with this one,  which is intended to cover the coil of the upper coil  column  and whose edge 40, in the form of a flat crown, is  tiné to lean on the upper side of the pancake  of thread from the upper spool under the effect of a spring  41 of pressure acting on the lug-cap assembly,  interposed between the hat and the upper cover,  guided by the vertical sliding rod, the horizontal cover 10 attaching and locking in a fixed angular position on the top of the axial tube 5 secured to the lower plate 3, said cover having a latching device 21 when it is lowered onto the top of axial tube 5.  2. Bobbin holder, as defined in claim 1, c a r a c t é r i sé in that the pins or pins for fixing the bobbin have a star section.  3. Bobbin holder, as defined in claim 1, it has the fact that the pins or pins for fixing bobbins have a tubular section and that they are perforated.  4. Bobbin holder, as defined in. either of claims 2 or 3, characterized in that the upper spindle-cap assemblies are pushed down by helical-coil springs concentric with vertical rods whose stroke is limited downwards by a upper pin resting on a washer.  5. Bobbin holder, as defined in claim 4, characterized by the fact that the central part of the upper cover has an axial hole allowing it to slide on the upper part of the axial tube, said hole being bordered by at least one pawl urged towards the axial tube by a spring and oscillating about a horizontal axis, said pawl cooperating with a corresponding socket from the top of the axial tube to ensure the angular position of the cover relative to the axial tube and to the lower shelf.  6. Bobbin holder> as defined in claim 5> c a r a c t é r i sé in that each pawl comprises a release lever bearing on a part of the cover.  7. Bobbin holder, as defined in claim 6, it has the fact that each pawl and each corresponding release lever are placed in a bolier projecting from the bottom of the central part of the cover.