FR2497781A1 - METHOD FOR CHANGING COILS AND CHUCKS OF WINDING MACHINES WITHOUT AXIS - Google Patents

Abstract

PROCESS FOR CHANGING THE COILS AND CHUCKS OF WINDING MACHINES WITHOUT AXIS, PROCESS IN WHICH THE FINISHED COIL IS EJECTED, A WINDING CHUCK IS PLACED, THE BAND OF MATERIAL IS CUT AND FIXED ON THE CHUCK, AFTER WHAT IS THE FINISHED COIL DRAIN. CHUCK 13 IS PLACED ON THE SIDE BY WHICH THE FINISHED COIL 15 HAS BEEN EJECTED AND IS THEN PARTIALLY SURROUNDED BY THE STRIP OF MATERIAL 18 TO WHICH WE HAVE GIVEN SOFT, AFTER WHICH IS CARRIED OUT THE CUT AND THE SIMULTANEOUS OR CONSECUTIVE FIXING OF THE BAND OF MATERIAL 18.

Description

Method for changing reels and mandrels

winding machines without axis.

  The present invention relates to a method for

  change the coils and mandrels of winding machines

  without axis, in which process the finished coil is ejected, the winding mandrel is put in place, the strip of material is cut and fixed on the mandrel, after which

the finished coil is evacuated.

  Various conventional methods are known for changing the coils and mandrels of axisless winding machines, and among these, the forming method of the type known from German Patent Application No. 27 09 684 has been used. the finished spool is lifted slightly away from a carrier roll. Through the interstice thus formed, a winding mandrel is rolled to place it in the slot between the carrier rollers. The finished coil first returns to its initial position in the

  corner formed by the carrier rollers, then ejected from

  on top of the other carrier roller. By means of a pivoting fastener, the web of material is

  then attached to the mandrel and cut.

  This known method has the disadvantage that it can only put in place mandrels not exceeding a certain dimension, that is to say those that can slide in the corner between the carrier rollers while the finished coil is not yet ejected. As this corner is relatively small, the process is only used to wind paper

around the mandrels.

  For the rolling of the cardboard which is wound on larger diameter mandrels, the method according to the German patent application 27 09 684 is not suitable. It is the same for another known method (German patent application 26 38 368) in which the mandrel is introduced in the direction of the axes of the carrier rollers in the corner formed between them and the finished coil. After lifting the finished coil, it is possible to staple the tape on the mandrel and to evacuate

  the finished spool after cutting the web.

  Another quite complicated process is known (German Patent 21 18 963) in which the finished spool is ejected, or the web is cut, the finished spool is removed and the beginning of the web is glued to the mandrel. For the implementation

  of this known process, it is however necessary to

  crank the two carrier rollers to bring the mandrel into

  the corner formed by them. This operation requires a

  relatively expensive displaceable floor of the carrier rollers.

  If the web of material is cut and the finished spool is removed before the mandrel is placed in the wedge formed by the carrier rollers, it is difficult to maintain the new end of the formed web after cutting it. this

  and to be fixed on the new mandrel. In the event of

  the automatic process of changing reels

  and mandrels, this maintenance is however essential.

  sand. In the device known from the patent application

  29 20 707, this difficulty has been solved by

  the new end of the strip formed after cutting it applied on the periphery of a carrier roll at

  medium of a depression formed inside the latter.

  The apparatus necessary for this operation, however, is

relatively complicated.

  The present invention therefore aims to

  to develop a process which allows for very easy

  In other words, by simple means and in as short a time as possible, the automatic change of finished coils and mandrels for mandrels of different diameters. This result is achieved according to the invention in that the mandrel is put in place on the side by which the finished coil has been ejected and is then in part surrounded by the strip of material to which it was given slack, after which it performs cutting and simultaneous or consecutive fixation

of the strip of material.

  The method according to the invention offers the advantage of allowing the introduction of mandrels of virtually unlimited diameters. This is made possible by the fact that the coil

  finished is ejected in a position which does not interfere with the posi-

  a new chuck. The winding mandrel being introduced into the machine on the same side by which the finished spool was ejected, it is also possible that the mandrel is partially surrounded by the material strip, which makes it possible to hold the end formed after cutting and thus facilitates fixation. Preferably, the web of material during the cutting process is glued to the mandrel as and when

of the cup.

  The process according to the invention can be implemented

  with relatively simple means, for example with

  Positive mandrel positioning and stapling known by

  German Patent Application 27 09 684.

  The invention will be better understood with the aid of

  description of an embodiment taken as an example, but not

  limiting, and illustrated by the accompanying drawing.

  The ejection bar 1 comprising the cutting device 2 can pivot about the axis of the carrier roller 3 by means of two levers 4 which are mutually connected, fixed in rotation, by a crossbar 5. On the levers 4 are provided 6 guides along which the ejection bar 1 can move transversely to the axis of the carrier roller 3 with the aid of the motor 7. The cutting device 2 is also mounted movable along the guide 8 of the bar ejection

  1, but in the direction of the axis of the carrier roller 3.

  The second important element of the automatic changeover device is the positioning of mandrels 9. It consists essentially of two levers 11 which can pivot about the axis of the carrier roller 10 and are connected, fixed in rotation, by a crossbar 12. The crossing 12 is

  intended to receive positioning chutes 14

  changeable and adapted to different diameters of mandrels

winding 13.

  The means for securing the web of material 18 to the mandrel 13 are not shown in the drawing. It may be a stapling device also disposed on the ejection bar 1 or a device for applying an adhesive tape sticking the strip 18 on the mandrel 13. In this case, the device can be coupled to the

  cutting device 2 in order to move with it.

  The mode of operation is now explained in detail using the different positions, illustrated in FIGS. 1 to 5, of the device for changing the coils and the

winding mandrels.

  Figure 1 shows the initial position before the change. In FIG. 2, the finished spool 15 is ejected from the carrier rollers by a pivoting movement of the levers 4

  in the direction of arrow 16, and transferred to a platform

  dropable form 17. The strip of material is pulled in its wake.

  After reaching its front end position (Figure 2), the ejector bar 1 can be preset to any

  diameter of mandrels by displacement along the guides 6.

  The ejection bar 1 with the cutting device 2 is then removed from the carrier rollers by pivoting back of the levers 4 in the direction of the arrow 21. A little slack is then given to the strip of material, for example by loosening the brake or by slightly lowering the platform 17. By pivoting the levers 11, the mandrel 13 is positioned on the carrier rollers (FIG. 3), the material strip 18

  coming then to apply on a part of its periphery.

  As can be seen in FIG. 4, the levers 11 of the chuck positioner 9 then pivot back in the direction of the arrow 19 while the cutting device 2 pivots forward again in the direction of the arrow 16 to come above the material strip 18 on the upper face of the mandrel 13. In this position, the material strip 18 is cut by means of the knife 20 and glued to the mandrel 13. The cutting device 2 can then be the ejector bar 1, be pivoted back again in the direction of the arrow 21 and returned to the initial position shown in Figure 5, as in Figure 1. The pressure roller 22 is then lowered on the mandrel 13 and the

  winding process can continue.

Claims (2)

  1. Method for changing bobbins and mandrels of axisless winding machines, in which method   ejects the finished coil, we put in place the winding mandrel   the material web is cut and fixed on the mandrel, after which the finished spool is removed, characterized in that the mandrel (13) is put in place on the side through which the finished spool (15) has been ejected and is then partially surrounded by the strip of material (18) to which slack has been given, after which the cutting and fixing is carried out   simultaneous or consecutive of the strip of material.   2. Method according to claim 1, characterized in that the strip of material (18) during the cutting process is glued to the mandrel (13) as and when the chopped off.