DE2513144A1 - METHOD OF MANUFACTURING THE TAP AND DEVICE FOR CARRYING OUT THE METHOD - Google Patents

Description

G + W MASCHINEN AG CH "8330 Pfäffikon / ZH

Process for the production of ball and device for carrying out the process.

The invention relates to a method for producing Balls wound onto winding mandrels by means of winding arms in automatic ball winding machines. The invention also relates to a device to carry out the method, a ball produced according to the method and an application of the method.

In the applicant's Swiss patent specification No. 544716 a shield mandrel for automatic ball winding machines has already been described, the structure of which is made up of longitudinal and side struts

609815/0333

and each has an open or closed position. To the Avoiding the formation of nests in the skein as a result of the winding layers slipping off are at the ends of some of the Struts protruding lugs attached, which protrude only in the open position of the shield mandrel over the frame, on the other hand Do not protrude beyond the scaffolding in the closed position.

In the Swiss patent specification No. 546.699 of the applicant, a loop winding machine and a number are also horizontal arranged shield spikes described. The installation of the above-mentioned shield mandrels in this automatic ball winding machine has proven itself and prevented the winding layers from slipping over its longitudinal struts. The well-known coil winding machine has also proven itself Tried and tested in the production of balls with the thread end lying on the outside.

It is well known that an externally adjacent thread end of the outermost winding layer has a disruptive effect when the wound layers are banded Skein of .-. :: The resulting after cutting from the thread guide The end of the thread often hangs out of the way for banding. suitably down the circumference of the ball. The end of the thread therefore often has to be manually fixed to the ball in some way before it is ready for banding. This manual work step is otherwise inefficient fully automatic production process.

609815/0333 "

In the ball winder of the aforementioned patent measures have already been taken to prevent the end of the thread from falling off the ball.

The aim of the invention is to show a method which makes the mentioned manual work step unnecessary and at the same time the design of the automatic ball winding machine is simplified.

The invention accordingly relates to a method of the above-mentioned type for the production of balls, characterized in that that after completion of the winding process, the thread to and past the front end of the winding mandrel and thereby at the Winding mandrel is fixed that, furthermore, after the thread has been cut, the ball is pulled off over the front end of the winding mandrel and the thread end of the ball fixed on the winding mandrel is drawn into the ball, and that after the separation of the The thread end of the winding mandrel is released again from the winding mandrel.

The invention also relates to a device for carrying out the method, characterized by a winding mandrel and by a wrapping arm, by a thread guide to bring the thread up and past the front end of the winding mandrel, by a device for fixing the thread on the winding mandrel, and by a cutting device to cut the thread.

809815/0331

The ball made according to the process is marked; through a thread end located inside the ball of the outermost winding layer.

Finally, the invention relates to the use of the method in a ball winder with a variety parallel, one-sided clamped shield mandrels, each with a wrapping arm and a cutting device per shield mandrel, with Gripping trays attached to a common pull-off bar per umbrella mandrel for pulling off the balls, each with a thread guide per screen mandrel for guiding the thread past the free front ends of the screen mandrel and with an air suction device for sucking the thread ends into the shield mandrels.

The invention is explained in more detail below for some exemplary embodiments with reference to the accompanying drawing. Show it

1 shows a device in a schematic representation to carry out the procedure;

FIG. 2 shows an exemplary embodiment of a winding mandrel as part and 2a part of the device; FIG.

3 shows a further exemplary embodiment of a winding mandrel;

4 shows, in a schematic representation, components of a ball of vetch loudspeakers in which the procedure is used;

5 shows a ball produced according to the method.

The method is explained below with reference to the device according to FIG. 1. The apparatus for carrying out the comparison

809815/0333

F ahrens contains a winding mandrel 1, a thread guide 2, a thread cutting device 3 and the rotating winding arm 4 which feeds the thread 5. The winding mandrel 1 is clamped on one side at its rear end 1 ″, for example on the beam 6. The thread guide 2 can be positioned in the thread path between the winding mandrel 1 and the winding arm 4 the winding mandrel 1 then cuts off when the thread 5 is in contact with the front end 1 'of the winding mandrel. For the sake of simplicity, FIG. 1 shows only the last winding layer of the ball 7. To explain the method, the position of the winding arm 4 is shown in FIG. B, C shown.

In the process, after the last winding layer has been placed, the thread 5 is brought up to ^{and past the front end I 1 of} the winding mandrel 1. The thread guide 2 is provided for feeding the thread 5 up and past. For this purpose, the thread guide 2 is positioned after the winding has ended in such a way that the thread 5 is hooked onto it. The point in time A represents, for example, the moment when the thread is hung on the thread guide 2 and the start of the thread being guided by the thread guide 2. The thread guide 2 is designed in such a way that when the winding arm 4 is rotated in the direction of arrow 8, the thread is guided to the front end 1 * will. Time B represents this moment and, at the same time, the end of the guide. The thread guide can therefore, for example, at time B from its

609815/0333

Position to be moved away.

It is essential that the one running along the front end 1 ' Thread 5 is fixed on the winding mandrel 1. The device accordingly contains a device for fixing the thread on Winding mandrel. The fixation can be done in two ways, which is why in Fig. 1 the devices for both types of fixation are shown in simplified form.

The preferred method consists in that the thread 5 running along the front end is grasped by an air stream and, with its effect, is fixed on the winding mandrel. For this purpose, the front end 1 ″ is acted upon by an air flow which is directed against the winding mandrel 1. The front end 1 * can be acted upon by a compressed air stream directed from the front onto the winding mandrel as well as by an intake air flow attacking from the rear. The latter is preferred The device for fixing the thread 5 accordingly contains an air ^{suction device 9 and a means for applying suction air to the front end I 1.} The means expediently forms an air duct IO between the front end 1 * and the air intake device inside the winding mandrel 1 9. The front end 1 ^r has an air inlet opening 11 for sucking the air flow X2 into the air channel. To support the thread passed at the front end against falling off, the device in FIG contain proppants, not shown

C at *

a more detailed description of the device is given with reference to FIG. After the thread 5 has been fixed at the front end l ^f becomes

609815/0333

it is cut off from the wrapping arm 4 at time C, for example. It can be seen that the resulting thread end 5 ′ remains fixed on the winding mandrel 1 by the action of the air flow. If an air duct 10 is provided in the interior of the winding mandrel 1, the thread end 5 ^{1 is drawn} through the inlet opening 11 into the air duct 10 and thus into the winding mandrel.

The mentioned second method for fixing the thread 5 on the winding mandrel 1 consists in that the ^{thread 5 brought up to the front end I 1 is} fixed in a sliding manner at the front end in the direction of the thread. The mentioned device for fixing the thread accordingly consists of a gripping means 13 which is arranged at the front end I ^{1 of} the winding mandrel. The gripping means 13 is designed in such a way that the thread brought up by the thread guide can be inserted into the same and is fixed ^{against falling off the front end I 1.} Furthermore, the thread 5 is guided in the gripping means 13 in a sliding manner in the longitudinal direction of the thread. In addition, the gripping means 13 allows the ball to be pulled off the front end 1 'of the umbrella mandrel 1 without hindrance. The gripping means 13 expediently has an open position for inserting the thread and a closed position for pulling off the ball. A detailed description of the gripping means 13 is given with reference to FIG. 3. After the cutting at time C, the resulting thread end 5 ¹ remains hanging in the lubricant 13.

After cutting off the ball 7 is pulled off in the direction of arrow 14 over the front end I ^{1 of} the mandrel 1. Essential

609815/0333

^{Liches feature of the invention is that in this case the thread end 5 1} fixed on the winding mandrel 1 according to one of the two described fixing methods is pulled into the interior of the ball. The fixation is designed such that after the ball 7 has been separated from the winding mandrel 1, the fixed thread end 5 ¹ is detached again from the winding mandrel. The balls 7 produced according to the method thus no longer cause the difficulties described at the beginning when banding.

In the exemplary embodiment, the thread guide 2 is designed as a bracket. Its end has a suitable curvature 2 * , which ensures that the thread glides safely along. The thread guide 2 is moved to the position shown after completion of the winding, for example at time A, and thereby places the thread in the manner shown in dashed lines. When the wrapping arm 4 advances in the direction of the arrow 8, it slides ^{along the curvature 2 1} and at the point in time B ′ has been stripped over its end to the front end T ¹ . The thread guide 2 is then moved away from the front end I ^{1 of} the winding mandrel 1. The shape of the thread guide 2 can of course be modified in many ways. If appropriate, thread guides of other designs can also be used.

According to FIG. 1, the winding mandrel 1 is shown in a horizontal position. It should be noted, however, that the Process is independent of the position of the winding mandrel and, for example, also with vertical winding

609815/0333

2513U4

thorns is applicable.

In Fig. 2 is a. Exemplary embodiment of a winding mandrel shown, in which the thread is fixed by an air stream. The winding mandrel is designed as a shield mandrel 20. A detailed description of such a shield mandrel can be found in the aforementioned Patent No. 544,716, which is why his Construction is only briefly explained. The shield mandrel 20 is shown to the left and right of the line A - B in the closed or open position. In the closed position, the wrapping layers are placed over the scaffolding, the open position is ready for pulling off the wound skein set. The framework is made up of the articulated longitudinal struts 21, side struts 22 and Auxiliary struts 23 built. The lower side struts 22 are at 24 rotatably attached to the stationary holder 25. To actuate the open position, the actuating rod 26 is moved in the direction of the arrow 27 pressed into the holder 25, the frame being pulled lengthways. On the side struts 22 are the aforementioned protruding lugs 28 attached which the sliding down prevent the winding layers 29 shown in dotted lines.

The device for fixing the thread contains the schematically shown air suction device 9, which via the Line 30 is connected to the actuating rod 26. The actuating rod is hollow on the inside and forms an air duct 10 in the shield mandrel 20 between the air suction device 9 and the front end 20 'of the shield mandrel 20. The air is preferred

609815/0333

from the beginning of the introduction of the thread to the detachment of the Ball acted upon by the shield mandrel. The facility includes expediently also a support means at the front end 20 * which prevents the thread from falling off the front end. This consists, for example, of a number of pins 31 which approximately according to FIG. 2a concentrically around the air inlet opening 32 are arranged. The thread brought about is inserted between the pins 31 and the thread end through the air inlet opening 32 is drawn into the actuating rod 26.

In the exemplary embodiment according to FIG. 3, the winding mandrel is again a shield mandrel 40 is provided, in which, however, instead of an air stream, a thread gripping means 41 as a device for There is fixation of the thread. Otherwise, the shield mandrel 40 is constructed like the shield mandrel 20, which is why for the same Parts the same reference numerals are used. The gripping

4esj

means 41 for fixing the thread and thus (contains the thread end in the exemplary embodiment a number of hooks 42 which are concentric are arranged around the axis of the shield mandrel 40. The hooks 42 are through with their shaft in the interior of the frame the slidably mounted fasteners 43 are attached to the operating rod 44. Furthermore are between the side struts 22 and the fastening means 43 articulated connecting struts 45 are arranged. The front end 40 'of the In addition to a passage for each hook shaft, the shield mandrel has a sufficiently large recess 46 for countersinking the hook heads 42 'on. As can be seen from Fig. 3, protrude at

609815/0333

In the closed position of the frame, the hook heads 42 ′ emerge from the front end 40 ¹ . They form the named open position of the gripping means 41. The gripping means 41 is brought into the closed position when the shield mandrel 40 is moved into the open position. From Fig. 3 it can be seen that the hook heads 42 ″ are sunk into the recess 46 of the front end 40 'in the closed position of the gripping means The countersinking of the hook heads 42. results in two advantages: On the one hand, the retracted hook heads 42 'prevent so-called "nests" inside the balls, since the inner winding layers of the balls are attached to the protruding hook heads 42' On the other hand, the sunk hook heads 42 'fix the thread end better so that it cannot slide out of the gripping means 41. The fixation is, however, made sufficiently loose to avoid that after the separation of the ball from the shielding mandrel 40, the thread end Thread end in_ the gripping means remains hanging.

Another possibility for preventing the formation of nests is that over the front end 40 ′ of the shield mandrel 40 For example, a not shown retractable sleeve is placed. The sleeve gives the gripping means 41 when it is inserted of the thread free and covers the gripping means 41 when pulling it off

609815/0333

of the ball. The advancement of the sleeve via the gripping means is preferably carried out synchronously with the actuation of the actuating rod 44. It can be seen that the use of such a sleeve eliminates the need to countersink the hook heads 47.

The invention is of course not limited to a gripping means 41 consisting of the hooks 42. The gripping means 41 is rather, they can be modified by a large number of designs, provided they are suitable for the process.

The method can be used, for example, in the automatic ball winding machine shown schematically in FIG. 4. A number of shield mandrels 20, for example of the type according to FIG. 2, are mounted in the support 51 in a horizontal position. According to the invention, a thread guide 2 is assigned to each shield mandrel. A rotating winding arm 4 and a cutting device 3 are also provided for each shield mandrel. The winding mandrels are connected to a common air intake device 52. On a common take-off bar 53 there is a pair of gripper shells 54 per shield mandrel for pulling off the wound balls 55. 57 mobile and transports the balls 55 pulled off the shield spikes 10 via the cell chain 58. The cell chain 58 conveys the balls 55 to a banding station (not shown). A detailed description of the gripper trays 54 and the take-off bar 53 can be found in the referenced Patent No. 546,699.

609815/0333

The ball 55 produced according to the method is shown in section in FIG. 5. Both the thread end 60 of the initial winding and the thread end 61 of the final winding are located inside the ball, the latter being pulled from the outside into the inside of the ball. It can be seen that the Thread ends 60, 61 do not interfere with the banding. In use, the ball can start from the end of the thread 60 can be developed without removing the banderole.

609815/0333

Claims (18)

2513U4 CLAIMS 1. A method for the production of balls (7, 55) wound onto winding mandrels (1, 20, 40) by means of winding arms (4) in Käuelautoniaten, characterized in that, after completion of the winding process, the thread (5) to the front end (I ¹ . 20 ', 40') of the winding mandrel is brought in and past and is fixed to the winding mandrel, so that after the thread has been cut, the ball is pulled off the front end of the winding mandrel and the thread end (5 ') of the ball fixed to the winding mandrel is inserted into the Skein is drawn in, and that during the separation of the skein from the winding mandrel, the thread end is released from the winding mandrel again. 2. The method according to claim 1, characterized in that the thread is fixed on the winding mandrel by an air stream. 3. The method according to claims 1 and 2, characterized thereby, that after cutting, the thread end is drawn into the winding mandrel (1,20) by the air flow (12). 4. The method according to claims 2 and 3, characterized in that the air flow during the period between the approach of the thread is applied to the front end of the winding mandrel and the separation of the ball from the winding mandrel. 5. The method according to claim 1, characterized in that the thread at the front end (I ¹ , 40 ') of the winding mandrel (1.40) is fixed in a sliding manner in the thread direction. 609815/0333 -is- 2513U4 6. The method according to claim 1, characterized in that the thread by the movement of the wrapping arm (4) to the front end of the winding mandrel is passed. 7. Device for performing the method according to claim 1, characterized by a winding mandrel (1, 20, 40) and a winding arm (4), by a thread guide (2) for bringing the thread (5) up and past the front end (I. ¹ , 20 '40') of the winding mandrel, by a device (9, 10, 11; 13) for fixing the thread on the winding mandrel, and by a cutting device (3) for cutting the thread. 8. Apparatus according to claim 7, characterized by a shield mandrel (20,40) as a winding mandrel, which has a closed position for winding and an open position for pulling off the ball has, which is also clamped on one side at its rear end and an axial, displaceable in a stationary Holder (25) arranged actuating rod (26,44) has for adjusting the open and closed position. 9. Apparatus according to claim 7, characterized by a ^{thread guide (2) designed as a bracket with a curvature (2 1} ), which bracket assumes such a position after the winding process that the curvature tip is adjacent to the front end of the winding mandrel. 10. The device according to claim 7, characterized in that the device for fixing the thread contains an air suction device (9) and a means which a sucked air flow from the front end (I ¹ , 20 ') of the winding mandrel (1,20) in the direction of the Winding mandrel steers. 609815/0333 11. The device according to claim 10, characterized in that the means has an air duct (10) between the front and the Forms the rear end of the winding mandrel, and that the air suction device (9) at the rear end of the winding mandrel to the means connected. 12. Device according to claims "8,. And 11, characterized by a hollow actuating rod (26) which forms the said air duct (10), through a shielding mandrel (20) with one of longitudinal and side struts (21, 22) constructed Scaffolding, by attaching the side struts (22) to the actuating rod and to the holder (25) in such a way that in the advanced position of the actuating rod the umbrella mandrel assumes the open position and in the retracted position the closed position, and further characterized in that the device for fixing the thread at the front end of the shield mandrel pins (31) belong which are arranged concentrically around the outlet ^{opening (32) of the air duct (10) at the front end (20 1} ) of the shield mandrel (20) (FIG. 2). 13. The device according to claim 7, characterized in that the device consists of a gripping means (13,41) arranged at the front end of the winding mandrel, which prevents the thread (5) from falling off the front end (1 ', 4O ¹ ) and prevents the thread end (5 ¹ ) fixed at the front end. 14. The device according to claim 13, characterized in that the gripping means (13, 41) is in an open position for inserting the Has thread and a closed position for pulling the ball off the winding mandrel. 15. Device according to claims 8, 13 and 14, characterized by a shield mandrel (40) with a longitudinal, lateral 609815/0333 -17- 2513U4 and auxiliary struts (21,22,23), as well as by designing the gripping means (41) of the front end (40 ¹ ) such that in the closed position of the shield mandrel the gripping means forms the open position, and in the open position of the shield mandrel the gripping means forms the closed position (Fig. 3). 16. The device according to claim 14, characterized by gripping means (41) with a number of hooks (42) which are arranged concentrically around the axis of the winding mandrel (40) at the front end (40 '), and are sunk in the front end (40 ') when the gripping means is in the closed position. 17. Ball (55) produced by the method of claim 1, characterized by a ball located in the interior of the ball Thread end (61) of the outermost winding layer. 18. Application of the method according to claim 1 in an automatic ball winding machine with a plurality of parallel, one-sided clamped shielding mandrels (20), each with a winding arm (4) and a cutting device (3) per shielding mandrel, with gripping trays attached to a common take-off bar (53) ( 54) per screen mandrel to pull off the ball, with a thread guide (2) per screen mandrel to guide the thread past the free front ends of the screen mandrels and with an air suction device (52) for sucking the thread ends (5 ¹ ) into the screen mandrels. 609815/0333