FR2458500A1 - PROCESS FOR WINDING TEXTILE MATERIALS - Google Patents

Abstract

THE INVENTION RELATES TO A DEVICE FOR CONTROLLING THE BACK AND BACK OF THE WIRE DISTRIBUTOR GUIDES DURING A WINDING OPERATION ALLOWING THE REALIZATION OF BICONIC COILS. THE DEVICE ACCORDING TO THE INVENTION IS OF THE TYPE INCLUDING A HELICOIDAL THROAT CAM TRANSMITTING AN ALTERNATIVE DISPLACEMENT TO A SLIDER COMMANDING A BAR EXTENDING THE ENTIRE WIDTH OF THE TRADE, AND FOR EACH WINDING POSITION, A WIRE GUIDE MOUNTED SWIVELING ON A SOLIDAR SUPPORT BODY OF THE Aforementioned BAR, THIS WIRE GUIDE BEING MOUNTED AT THE END OF A SQUARE ARM, THE OTHER END OF WHICH INCLUDES A ROLLER THAT IS GUIDED IN THE GROOVE OF A TILTING BAR IN SYNCHRONISM WITH THE FORMATION OF THE L '' WINDING, THE DEVICE ACCORDING TO THE INVENTION BEING CHARACTERIZED BY THE FACT THAT THE ENDS OF THE GUIDING THROAT OF THE BAR IN WHICH THE ROLLER CONTROLLING THE ANGULAR DISPLACEMENT OF THE WIRE GUIDE IS BURNED IN AN OPPOSITE WAY TO COMMUNICATE AN ACCELERATION THREAD GUIDE AT THE END OF THE STROKE, ALLOWING TO DISTRIBUTE THE WIRE AT CONSTANT SPEED. APPLICATION: REALIZATION OF BICONIC COILS.

Description

1. 2458500

  The present invention relates to an improvement made to the

  control devices of the device back and forth of the distribution guides

  yarns during a winding operation.

  It relates more particularly to an improvement

  means to vary the length of the movements

  wire guides so as to produce bi-shaped windings

  conical. The production of biconical-shaped windings has been known for a very long time and consists in progressively varying the length of the stroke of the various distribution members of the wire.

  For this purpose, as is described in particular in the

  vet 1 356 276, a cam system is used which transmits

  a movement back and forth to a support body of the guide wire.

  As shown in this document, the wire guide is

  pivotally mounted on the support body via an assembly

  essentially consisting of two arms arranged at right angles, the

  wire guide being disposed at the end of one of the arms and the end

  mite of the other arm being equipped with a roller sliding along a groove made in a bar, called "sinus bar"; it is known, moreover, that by mofifying the inclination of this sinus bar, it is possible to vary the stroke of the wire guide, this combined with a clock or in conjunction with the magnification of the coil, this

  which makes it possible to make windings of biconical form.

  The wire guides describe at the end two parallel rays while the pivoting of the sinus bar is done on a circular arc whose center is located substantially in the middle of said bar, which results in the shift relative to the path

  traveled by the roller causing deformation of the coil.

  If such a device gives a satisfactory compromise of the point

  from a textile point of view, it imposes mechanical stresses and

  its beats following the point of the wire guide due to the reversal of movement at the end of the stroke. These constraints can be reduced by the use of a large radius of curvature between the cam ramps, but this to textile repercussions because the wire is deposited in greater quantities at the winding end,

  which causes deformation of the generatrix of the coil.

  However, it has been found, and this is the subject of the present invention, an improvement to devices of the aforementioned type,

  which overcomes these disadvantages and allows the realization of

2458500

  perfectly regular biconical elements.

  In general, the invention therefore relates to a perfecti

  the control systems for the movements of

  wire guide when making a biconical coil, these systems

  control systems being of the type comprising

  - a helical groove cam with transaxle rays

  setting a reciprocating motion to a slider controlling a bar extending across the entire width of the loom, and for each winding position

  10. a thread guide pivotally mounted on a support body

  of the aforementioned bar, this wire guide being

  at the end of an angled arm, the other

  end has a roller which is guided in the rim.

  of a bar (sine bar) tilting in synchro-

  with the formation of the winding.

  The improvement according to the invention is characterized by the fact that the ends of the guide groove of the sinus bar

  in which the roller controlling the angular displacement

  wire guide are bent in the opposite direction so as to

  to provide an acceleration to the wire guide at the end of the stroke, while the support of said wire guide has a delayed movement at this time due to the

  passage of the cam tip, this acceleration allowing

  point the wire at constant or accelerated speed.

  The course of the wire guide will of course be a function of the windings.

  formed. In general, the cam tip rays are between 10 and 100 millimeters and can be executed

  following a "Bernouilli Lemniscate" to facilitate slowing down

  and accelerations of wire guides. The correction on the sinus bar is complementary to the shapes of these tips and can be more accentuated so as to accelerate the speeds of the wire guides at the end of the race. Moreover, the pivot axis of the bar

  sinus will also receive, during the formation of the coil, a

  compound allowing it to be moved slightly so

  that the roller causing the angular displacement of the wire guide takes

  do not always rely on the same profile of the curve

  the groove of the sinus bar, whatever the diameter

  be of the winding formed. The coil coil link mechanism

  sinus is not represented in the patent.

  The movement of the sinus bar is produced through a

  calculated so that its average position corresponds to

3 2458500

  with the beats of the guide-wires that run through it.

  The invention -t the advantages it brings will however be better understood thanks to the embodiment given below, by way of illustration but not limitation, and which is illustrated by the attached diagrams in which

  FIG. 1 is a diagrammatic view from above of a device

  winding device according to the invention,

  FIG. 2 is an enlarged top view showing the

  sine bar and wire guide placements during winding

  FIG. 3 is a perspective view of a device

form to the invention.

  In this embodiment, the invention will be described for a device for producing a biconical coil having the following characteristics: diameter of the support tube 7 cm diameter after winding: 25 cm maximum stroke (at the beginning of bobjnage): cm

  - minimum stroke (at the end of winding): 12 cm.

  To achieve such winding, is used, as is illustrated by the accompanying figures, a device that consists of

  essentially of a cam 2 whose tips are made advantageously

  tagently in Lemnicate, and which has a helical path

  making it possible to communicate a movement B of 16 cm, constant to a slide 3. This slide 3 transmits its movement to a bar extending over the entire width of the machine, parallel to the winding axis, and which supports, for each position, a support body 9 on which is pivotally mounted a wire guide 4. In a manner

  known, the wire guide 4 is mounted at the end of an arm

  re 21 whose other end 22 has a roller 5 which is guided by the groove 8 provided in a sine bar 6 which pivots around

  an axis 7 during the formation of the winding. In the case of

  7, the sinus bar 6 can be inclined at an angle of 10, which allows, given the length of the arms of the angled arm supporting the wire guide 4 to obtain- a curve of the wire guide variant

  between a length of 20 cm and a length 1 of 12 cm at the end of

  hoeing. These two extreme positions of the sinus bar are represented in plan view in FIG. 2, the position at the beginning of winding being represented in solid lines and that at the end of winding in

mixed lines.

4 2458500

  According to the invention, the groove 8 of the sine bar 6 has at each of its ends curved parts 10, 23 in opposite directions, which make it possible to communicate to the wire guide, a

  acceleration at the end of the race, while the support 9 of said guide-

  wire has a delayed movement at this time due to the

  te of the cam. Because of this acceleration, we obtain a movement

  the wire guide is identical to that which would have been given by a cam with pointed ends and a conventional sinus bar having a rectilinear groove. In this way, it is possible to produce windings having the same characteristics as before and this to

  beat rates 2 to 3 times higher than the system

  rant. In the present case, the groove of the sine bar according to the invention has a rectilinear part having a length of

  14.8 centimeters, the curved parts having a radius of 2 centimeters.

  very, the total length of the sine bar 6 being 16 centimeters

very.

  Moreover, so that during the formation of the two-way coil

  conical guide roller 5 always works on the same profile of the curve 10 or 23 so as not to deform the movement, the pivot axis 7 of the sine bar can be moved between two positions 11, 12. This displacement is obtained by providing in the

  sinus bar a light 24 in which is guided the axis 7. This de-

  placement is obtained in synchronism with the angular displacement of said sine bar by the action of a guide pin 13 which

  bears in a groove 14 of the bar.

  The device making the connection between the coil and the bar

  sinus is not represented in the patent. Thanks to such a

  it has been possible to wind textile threads,

  laments, at speeds two or three times higher, the coils

  formed biconical elements being perfectly regular.

  Compared to the previous devices, such a device pre-

  apart from the possibility of winding flat wires and

  the production speeds, the following advantages - Shock noise reduction,

- power reduction absorbed.

  It is obvious that the invention is not limited to the embodiment described above, but that it also covers

all variants.

  So for example it could be used for winding

2458500

  individual head or to obtain windings with soft edges

  accentuating the peak acceleration.

  Similarly, if in the present description, the invention has been

  described with an acceleration of the movement of the wire guide at the end of the stroke, it is evident that by playing on the relation existing between the shape of the cam and the shape of the sinus bar, which one

  could change the movement of the wire guide for possible

  either a deceleration or a constant speed.

rk - - 6 - 2458500

Claims (4)

  1 / Device for controlling the back and forth of the distribution guides   threads during a winding operation which makes it possible to   biconical coils of the type comprising: a helical groove cam transmitting an alternating displacement to a slider controlling a bar extending over the entire width of the loom, and for each winding position;   a wire guide pivotally mounted on a support body   of the aforementioned bar, this wire guide being   at the end of an angled arm, the other end of which comprises a roller which is guided in the groove of a tilting bar in synchronism with the formation of the winding, characterized in that the ends of the guide groove   of the bar in which the roller controlling the movement   angular cement of the wire guide are curved in opposite directions, so as to communicate an acceleration to the wire guide at the end of the stroke, while the support of said wire guide has a delayed movement at this end.   moment, this acceleration to distribute the wire quickly is constant.   2 / Apparatus according to claim 1, characterized in that the pivot axis of the sinus bar also receives, in progress   the formation of the coil, a compound movement   place it slightly so that the roller causing the movement   angle of the wire guide will always be supported by the same   $ yarn of the curve provided at the ends of the groove of the bar   sinus and this, regardless of the diameter of the winding formed.   3 / Apparatus according to claim 1, characterized by the   that the curvature of the sine bar tips wire in Lemniscate.   4 / Apparatus according to one of claims 1, 2 and 3, carac-   terized by the fact that there is a predetermined relationship between the   shape of the cam tips and the shape of the tips of the sinus bar.