FR2681338A1 - (EN) METHOD FOR SEPARATING THE SAIL AT THE OUTPUT OF THE RECTIFIED FEEDERS FOR LONG FIBERS AND DEVICE FOR IMPLEMENTING SAID METHOD. - Google Patents

Abstract

The present invention relates to a method for separating the web at the outlet of straight combing machines for long fibers and to a device for implementing this method. Method characterized in that it consists in separating the veil (1), from the start of its formation on the tear-off leather (3), by means of tear-off rollers (2), into at least two parts, by means of jets of compressed air directed perpendicularly to the direction of advance of the web (1), so as to form various small parallel divisional webs (8), to gradually wind the edges of the small webs (8) on themselves, in order to achieve small ribbons, and to release the latter downstream of the tear-off leather (3) to bring them into at least one funnel (5) joining them together in at least one large outgoing ribbon. The invention is more particularly applicable in the field of the textile industry.

Description

A method of separating the web at the exit of the rectilinear combers for

  The present invention relates to the field of

  the textile industry, in particular

  lines for long fibers, in particular the formation of the web at the exit at the level of the tear-off leather before its transformation into a ribbon, and relates to a method of

  separation of the veil at the exit of the straight combers

gnes for long fibers.

  The invention also relates to a device

  tif for the implementation of this process.

  On a rectilinear combing machine the fibers

  The skin thus formed is now integrally assembled in a funnel, to form the ribbon coming out of the skin.

comber.

  However, this known method of making, including the entire veil on the tear skin and not separate it, has several

  disadvantages On the one hand, all the welds are

  at regular intervals, in the same places, so that the ribbon has weak spots and therefore poor strength and poor cohesion and, secondly, the said welds are repeated at intervals. the regularity, the appearance and the presentation of the ribbon, do not give

  not satisfied with the materials used.

  Sees. The present invention aims to overcome these disadvantages by proposing a separation of the veil in at least two parts, from the beginning of its training on the

  leather, and a resumption of these parts, to the ex-

  downstream end of the tearing leather, in a funnel.

  It concerns, in fact, a method of

  paration of the haze at the exit of the rectilinear combers for long fibers characterized in that it consists in separating the haze, from the beginning of its formation on the tearing leather, in at least two parts, by means of air jets tablet directed perpendicular to the direction

  of the veil, so as to form different

  parallel divisional sails, to wind

  gressively the edges of the small sails on them-

  same and to release them downstream of the leather of tearing to bring them in at least a funnel bringing them in

at least one large ribbon coming out.

  The invention also relates to a device

  for the implementation of this method, characterized in that it consists essentially of at least three

  blowing ramps arranged above the leather of arra-

  between the stripping cylinders and the call rollers and having compressed air ejection nozzles extending perpendicular to the direction of advancement of the web. The invention will be better understood, thanks to the

  description below, which relates to a method of

  preferred embodiment, given by way of non-limiting example, and explained with reference to the appended diagrammatic drawings, in which: FIG. 1 is a longitudinal sectional view

  a device for implementing the method in accordance with

  me to the invention; Figure 2 is a plan view of the device according to Figure 1; Figure 3 is a cross-sectional view

  and on a larger scale of the device according to the

  1 and 2, and FIG. 4 is a partial plan view of

  the downstream end of the tear-off leather representing a

  the realization of the formation funnel of the

  ban. According to the invention, and as the

  in particular, by way of example, the figures

  1 to 3 of the accompanying drawings, the method of separating the combed fiber web 1 at the exit of the rectilinear combers for long fibers consists in separating the

  veil 1, from the beginning of his training on the leather of arra-

  chage 3, by means of tear cylinders 2, in at least two parts, by means of jets of compressed air directed perpendicular to the direction of advance of the web 1, so as to form different small parallel dividing webs 8, to wind progressively edges of

  small sails 8 on themselves, in order to achieve

  Tiny ribbons, and to release the latter downstream of the tear leather 3 to bring them into at least one funnel bringing them together in at least one large ribbon out.

  The device for implementing this program

  assigned is characterized in that it is essentially

  constituted by at least three blowing ramps 7

  above the peeled leather 3 between the pulling rollers 2 and the rollers 4 and having

  compressed air ejection nozzles extending perpendicularly

  in the direction of advancement of the veil 1.

  The ramps 7 with their compressed air ejection nozzles are advantageously integrated in the covering surface 6 holding the web 1 on the tear-off leather 3, between the rolls 2 and 4, a ramp 7 being provided along each edge of the leather of tearing

  3 These ramps 7 are preferably arranged parallel to each other

  in the direction of advancement of the veil 1 or slightly

  by following the path of the selvedges

  The number of ramps 7 is a function of the number of divisional sails 8 to be made and their compressed air ejection nozzles can

  have a circular, oblong, square, recess-

tangular or otherwise.

  In a manner known per se, the supply of the ramps 7 can be carried out from a compressed air network with the interposition of a pressure regulator or by

any other source of compressed air.

  At the exit of the circular comb and the comb

  fixed, the veil of combed fibers 1 is taken by

  2 tearers 2, who put it on the leather of arra-

  chage 3 The latter moves the veil 1 to the cy-

  4 when it passes over the tear-off leather 3, the web 1 is separated, between the cover surface 6 and the tear-off leather 3, by the jets of FIG. air from the nozzles of the blowing ramps 7, into several small divisional webs 8 which, during the advance of the leather 3, become small ribbons under the effect of the blowing on their edges These

  small ribbons are then grouped together by means of the cylinders

  callers 4 in the funnel 5 which brings them together in one

big ribbon coming out.

  Under the effect of blowing on the edges of

  small divisional veils 8 and on the fibers in general

  ral, these are well nested in each

  others, which gives the resulting tape a better

  nude and better cohesion making it less fragile and

  less subject to irregularities, so that

  the following conditions are facilitated and its quality is

improved.

  Because of the division of the veil 1, the differences

  The small sails 8 can be staggered, so that the seams are no longer at regular intervals, but are dispersed in the ribbon, being offset relative to each other. Thus, the regularity, the appearance and the presentation of the ribbon are improved. , particularly in the case of the use of certain materials, which is

  very beneficial for the quality of the product coming out

  the multiplication of the divisions of the web 1 by the increase of the blowing ramps 2 allows for better interweaving and better intermingling of the fibers,

  so that the outfit and the cohesion of the outgoing rubbing are improved. According to an alternative embodiment of the invention

  tion, not shown in the accompanying drawings, the various small dividing sails 8 can be combined into several funnels. Figure 4 of the accompanying drawings shows a

  another variant embodiment of the invention, in the

  which the small divisional veils 8, wound in individual ribbons, are brought into at least one enton-

  Black 9 eccentric to the axis of the tear leather 3 Thus, when the meeting of the individual ribbons the welds of each ribbon are offset from that

  the other ribbons, each ribbon following a different trajectory as it passes through the ex-

  centered, so that the holding, the cohesion and especially the regularity of the outgoing ribbon are improved. In a known manner, the welding between the fibers of the small divisional sails 8 is effected by an advance of the tear-off leather 3 along the arrow 10 followed by a smaller amplitude recoil along the arrow 11. Thanks to the invention, it it is possible to form ribbons at the exit of the combers

  rectilinear with prior separation of the veil, at the beginning of its training on the leather of tearing, in several pe-

  divisional veils, and taking them back to the downstream part of the tear-off leather, in the form of small ribbons, in one or more funnels.35 Of course, the invention is not limited to

  embodiment described and shown in the drawings

  Modifications are possible, particularly from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims (3)

R E V E N D I C A T IO N S   1 Process for separating the web (1) from   of straight long fiber combers,   characterized in that it consists in separating the web (1), from the beginning of its formation on the tearing leather (3), by means of pulling cylinders (2), in at least two   parts, by means of compressed air jets directed   in the direction of advancement of the veil (1),   to form different small dividing parallel veils (8), to gradually wind the edges of the small sails (8) on themselves, in order to make small ribbons, and to release the latter downstream of the   pulling leather (3) to bring them into at least one   funnel (5) bringing them together in at least one large ribbon coming out. 2 Device for implementing the method according to claim 1, characterized in that it consists essentially of at least three blast ramps (7) disposed above the tear-off leather (3) between the pulling cylinders ( 2) and the call rollers (4) and having compressed air ejection nozzles extending perpendicular to the direction of advance of the web (1).  3 Device according to claim 2, characterized in that the ramps (7) with their compressed air ejection nozzles are advantageously integrated in the covering surface (6) holding the web (1) on the leather of 1) between the rolls (2 and 4), a ramp (7) being provided along each edge of the pulling leather (3). 4 Apparatus according to any one of the claims 2 and 3, characterized in that the ramps (7) are arranged, preferably parallel to the direction   8 advancement of the veil (1) or slightly skewed in   the course of the edges of the different small divisional sails (8). Device according to claim 2, characterized   characterized in that the different small dividing sails (8) are combined into several funnels. 6. Device according to claim 2, characterized in that the small divisional sails (8),   wound in individual ribbons, are brought into at least 10 a funnel (9) eccentric to the axis of the tear leather (3).