FR2604733A1 - APPLICATOR DEVICE FOR ADHESIVING A TABLE OF THREADS - Google Patents

Abstract

APPLICATOR DEVICE FOR STICKING A BED OF THREADS 1, INCLUDING EXPRESSING ROLLS 3, 5 ACTING JOINTLY, AT LEAST A FIRST TEMPERING EXPRESSING ROLL, AS A SOAKING ROLL 3, IN A SIZING TANK 7, AND THE BONDED WIRE BAND PASSING THROUGH AT LEAST ONE EXPRESSING INTERSTICE 4 BETWEEN TWO EXPRESSING ROLLS. HIGH WIRE SPEEDS ARE POSSIBLE, WITHOUT PROJECTIONS OF GLUING AGENT, BECAUSE THE TANGENT 13 WHICH, IN THE EXPRESSING INTERSTICE, IS COMMON TO THE ADJACENT EXPRESSING ROLLS, IS DIRECTED TO THE INSIDE OF THE TRAY SIZING 7, BY THE FACT THAT THE BED OF THREADS 1 ARRIVES FROM THE BOTTOM AT THE EXPRESSING INTERSTICE, AND BY THE FACT THAT A SPRINKLER 10 BY SIZING AGENT IS CONJUDE TO THE CORNER A CURVILINE PROFILE 9 PRECEDING THE EXPRESSING INTERSTICE 4.

Description

I

  APPLICATOR DEVICE FOR ADHESIVING A TABLE OF THREADS

  The invention relates to an applicator device for gluing a ply of threads, comprising pressing rollers acting jointly, at least one first soaking pressing roll, as a soaking roll, in a glue pan, and the ply of glued thread passing through at least one void space between

two squeezing rollers.

  In gluing machines, the layer of threads to be glued, generally a chain, is caused to pass through a roller of

  soaking, in a sizing tank containing the liquid sizing agent.

  Then, the excess sizing agent adhering to the web of yarns is expressed using a pair of rollers operating jointly, and the expressed sizing agent returns to the sizing tray or the like. A pair of squeezing rollers suitable for this purpose may consist of a dipping roller which only partially dips in the sizing bath and by another squeezing roller cooperating with the dipping roller. The expression gap is then arranged

  above the surface of the bath in the glue pan.

  When an expression roller is used at the same time as a dipping roller, two arrangements are possible. Either the sheet of wire passes only between the rollers, or else it passes into the bath by passing around a roller. Both processes are used

for gluing chains.

  The manufacturing cost of the sizing installation can be reduced by using soaking rollers so that they simultaneously form part of a pair of squeezing rollers. However, at the high speeds of modern machines, exceeding 120 m / min with 100 to 120 cP, or 300 m / min and more with 10 to 50 cP, the simplified devices can only be used with certain restrictions, because the agent sizing expressed in the expressing gap of the pair of expressing rollers is projected back, depending on the viscosity, when the speed of the wires increases, and splash protection sheets are then required to capture the 'sizing agent projected. However, such protective sheets oppose the accessibility of the arrangement of

  dipping rollers and glue pan.

  The object of the invention is to provide a sizing installation comprising expressing rollers intended to serve at the same time for the application of sizing agent, an installation in which a uniform distribution of the sizing agent can be obtained. sizing on the volume of the wires, despite the fact that the speed of the wires can be very high, and we will not need any particular means to deflect the

  sizing agent projections from the expressing gap.

  To achieve this goal, the invention provides, for the applicator device of the type indicated at the start, comprising at least one squeezing roller arranged as a soaking roller and at least one squeezing gap, that the tangent which, in the squeezing gap, is common to the adjacent squeezing rollers is directed towards the inside of the sizing tray, that the layer of yarn arrives from below at the squeezing gap, and that a means of watering by sizing agent is conjugated to the corner with curvilinear profile preceding

the interstice of expression.

  Thanks to the invention, the inlet side of the expressing gap of the cooperating rollers is directed downwards and, although the dipping roller plunges less deeply, a sufficient sizing is nevertheless obtained, since the sheet of wire to be treated is exposed to

  the sizing agent Until entering the testing gap.

  In the device according to the invention, the ply of threads can in particular be exposed to sizing agent not only by passing over the dipping roller but also, in particular in the case of insufficient supply after stopping. , be exposed to the sizing agent by spraying, for example by spraying,

  bottom up in the corner with curvilinear profile.

  According to the invention, the depth to which the quenching roller can be fixed in advance if a tray can be raised or lowered below the pair of expressing rollers or, if pumping means are associated with the sizing agent present in the tank, to raise or lower the level of the liquid. The container can be pivotally mounted about an axis parallel to the axes of the pressing rollers. It is thus possible, without deploying any noticeable force, to fine-tune the soaking depth, therefore the extent of the sizing agent drive on the soaking side. Of course, the quantity of sizing agent provided during watering can also be pre-established. So that the arrangement of rollers combining dipping and squeezing can, even at very high wire speeds, be used to glue a sheet of threads, another squeezing roller can be placed upstream of the pair of squeezing rollers with one of which he cooperates to perform an expressive action. The ply of threads then passes through two successive wedge-shaped zones with a curvilinear profile. In the first corner with a curvilinear profile, the supply of sizing agent is carried out by a sprinkler device of the watering boom type and, in the second corner with a curvilinear profile, the supply of sizing is obtained by dipping the last squeeze roller. The two rollers on the downstream side are then mutually conjugated so that their common tangent in the region of the expressing gap is directed towards the glue pan located below, so that the projections in return from the agent

  are returned to the glue tank.

  A particular embodiment of the invention will now be described in more detail which will make it better understand the essential characteristics and the advantages, it being understood however that this embodiment is chosen by way of example and that it

  is in no way limiting. Its description is illustrated by

  attached drawings, the figures of which represent: - Figure 1, a diagram of a cross section of a sizing agent applicator device with rollers for dipping / expressing combined, the first pressing roller constituting the dipping roller ; - Figure 2, schematically, an applicator device according to Figure 1, however with this difference that it is the second pressing roller which constitutes the soaking roller; and - Figure 3, schematically, an applicator device as in Figures 1 and 2, supplemented by another pressing roller

  creating a corner with a curvilinear profile.

  In the exemplary embodiment according to FIG. 1, a layer of wires 1 passes over an input roller 2 to go to a dipping roller 3 and, from this, having passed through an expressing gap 4, to a squeezing roller 5 cooperating with the dipping roller 3 by forming with it a pair of scoring rollers. Following the direction of arrow 6, the ply of yarns then goes to a next group comprising the sizing installation. The dipping roller 3 penetrates relatively little into the bath 8 present in a gluing tank 7. At the corner with curvilinear profile 9 between the pressing rollers 3 and 4, in which the layer of wires 1 engages from below , that is to say leaving the sizing tank 7, are associated with spraying or spraying means 10 which can be supplied from the tank

gluing by a pump 11.

  An important point is that it is from the bottom, that is to say from the bath present in the tank, that the sheet of thread enters the expressing gap 4, so that, even if the speed of the wires is very high, from the bath returning by projection in the direction of the arrow 12 returns exclusively to the tank 7, substantially following the direction of the tangent 13 which, in the expressing gap 4, is common to the rollers 3 and 5. In this way, a layer of threads 1 can be bonded to the core, uniformly, using an arrangement of combined soaking and pressing rollers, without any preventive measures being necessary to deflect the

projections in return.

  In the exemplary embodiment according to FIG. 2, the ply of wires 1 passes first over an expression roller 14 and only then over a soaking roller 15. As can be seen, if the level of the liquid 16 in the tank 7 only touches the soaking roller 15, but does not touch the other expression roller 14, the layer of wires 1 does not

  does not come directly into contact with the bath 8 contained in the tank 7.

  However, if the level of the bath 8 in the tank 7 is raised to such a point that the surface 17 of the liquid also touches the first squeezing roller 14, the layer of threads 1 is then brought to the squeezing gap 4 passing partly through a soaking and partly through a surface film 18 of the dipping roller 15. In the printing interval 4, the surface film 18 comes into contact with the sheet of

  yarn, to an extent normally sufficient for gluing it

  this. It is only if very large quantities of input are required that it may be appropriate to additionally bring the sheet of wires in contact with the surface of the bath 8. According to FIG. 2, the two rollers 15 and 14 of the pair carrying out the expression are also conjugated so that their common tangent 13 in the region of the expression gap 4 is directed towards the tank 7 containing the bath and the projections of return of the bath fall exclusively in the bac 7, following the

arrow direction 12.

  With the device according to FIG. 2 (as with the device according to FIG. 1 or 3), the extent of the bath supply, and consequently the level 16 or 17 of the bath 8, can be modified by raising or lowering tray 7, or tilting it around a

  axis parallel to axes 19, 20 of rollers 14 and 15.

  FIG. 3 represents an exemplary embodiment of an applicator device similar to that of FIG. 2, with a third pressing roller 21 disposed upstream of the rollers 14 and 15 pressed one against the other, at the place of the expressing gap 4. This expressing roller which the ply of wires 1 must cross first, in the direction of passage 6, will normally be arranged a little higher than the second expressing roller. In the curvilinear corner 23 open upwards, between the third expressing roller 21 and the second expressing roller 14, there is another, according to FIG. 3, above the expressing gap corresponding 22, a device, for example a ramp 24, for sprinkling with sizing agent, device using which bath extracted from the tank 7, for example using a pump 25, can be brought into the corner 23. The prior treatment of the layer of wires using the sprinkler device 24 increases the absorption capacity of the sizing agent for the individual wires, so that one can operate at very high speeds

  of operation, even in the presence of a very dense chain.

  In the exemplary embodiment according to FIG. 3, the pre-gluing in the first corner with a curvilinear profile open upwards makes it possible to obtain a gluing substantially greater than with the arrangements according to FIGS. 1 and 2, even * with very tight (dense) chains. An essential advantage lies in the fact that the ply of yarns 1 can be placed by being stored very exactly in the expressing intersection 4 or in the first and second expressing interstice, 22 and 4, because it cannot to be

  mutual disturbance of the individual threads during a bath treatment.

  With the guidance of the ply of wires according to the invention, we therefore obtain

  automatically consistent chain guidance.

  Naturally, the invention is in no way limited by the features which have been specified in the foregoing or by the details of the particular embodiment chosen to illustrate the invention. All kinds of variations can be made to the particular embodiment which has been described by way of example and to its

  constituent elements without departing from the scope of the invention.

  The latter thus includes all the means constituting technical equivalents of the means described as well as their combinations.

REVEIDICATIONS

  1. Applicator device for gluing a sheet of threads (1), comprising squeezing rollers (3, 5) acting jointly, at least one first squeezing squeeze roller, as a soaking squeeze roller (3) glue tank (7), and the layer of glued thread passing through at least one squeezing gap (4) between two squeezing rollers, characterized in that the tangent (13) which, in the gap d 'squeezing (4), is common to the adjacent squeezing rollers is directed towards the inside of the glue tank (7), by the fact that the ply of threads (1) arrives from below at the gap of expression, and by the fact that a means of watering (10) with sizing agent is conjugated to the corner with curvilinear profile (9) preceding

the exprization gap (4).

  2. Device according to claim 1, characterized in that the first roller (3) to be crossed by the sheet of wires <1) is

fitted with a soaking roller.

  3. Device according to claim 1, characterized in that the second roller (15) by which the sheet of wires <1) must

  pass is arranged in soaking roller.

  4. Device according to claim 1, characterized in that the level of the sizing agent in the sizing tank (7) can be selectively preset to a lower level (16) for which only one roller dips in the sizing agent, and at a higher level

  (17) for which a second roller dips in the sizing agent.

  5. Device according to any one of claims 1 to 4,

  characterized in that another pressing roller (21) is arranged upstream of a pair of pressing rollers (14, 15) having, in their pressing gap, a common tangent which, in the direction transporting the web of threads (1), is directed towards the inside of the tank, and by the fact that a device (24) for sprinkling with sizing agent, produced in the form of a spray bar, is oriented towards the inside of the curvilinear profile corner (23) between said other expressing roller (21) and the adjacent experimentation roller (14) belonging to said pair of expressing

(14, 15).