EP2360302A1 - Cone warper and method for warping - Google Patents

Abstract

A yarn layer (6) is produced by winding up the warp belt comprised with thread sheet to a warping drum (2). A handle (11) having a predetermined radial direction length projecting out of the yarn layer divides the yarn layer. A pressure roller (9) is made to abut the yarn layer when the yarn layer reaches the radial direction thickness which corresponds to the radial direction length of the handle. The warp belt is displaced at a preset displacement rate. The displacement rate is changed when the pressure roller abuts the yarn layer. An independent claim is included for sectional warping machine.

Description

The invention relates to a method for producing a chain, in which one rotates a warping drum and thereby wound at least one band formed from a group of yarn on the warper drum and thus generates a winding, wherein at least one inner dividing device used, which protrudes on one of the winding End is provided with a handle having a predetermined radial extent.

Furthermore, the invention relates to a Konusschärvorrichtung with a warping drum and at least one inner dividing device having a handle with a predetermined radial extent to the warping drum.

As a rule, a chain has such a large number of threads arranged in parallel that it is not possible to remove all the threads from a gate at the same time. For this reason, one usually summarizes several threads into a so-called "band" and winds this Tape the circumference of the warping drum by turning the warping drum and forming a wrap. Once the required length of tape has been wound, the tape is offset parallel to the axis of the warping drum and rewound following the already wound tape. This process is repeated until the desired width of the chain is reached. In order to prevent the threads from falling off at the end faces, the warping drum has a cone section which adjoins a cylinder section. The bands are then offset at each revolution parallel to the axis of the warping drum so that they follow the pitch angle of the cone section.

In order to be able to be handled later by a processor, one needs a graduation device, which can also be referred to for short as a "partial rod". For example, the sub-rod assigns adjacent threads to different groups, for example, by leading one thread above and one thread below the partial rod.

The partial rod must be repositioned at each band, ie it must be moved by the width of the band parallel to the axis of the warping drum. In order to facilitate this movement, the partial rod has a handle at its end protruding from the winding. This handle can also be used to automate the offset of the sub-bar. The Konusschärvorrichtung then has a corresponding pliers, which can detect the handle and pull parallel to the axis of the warping drum.

However, such a configuration has the disadvantage that the winding structure can be controlled only within certain limits. As a parameter for the construction of the coil is practically only the tension of the wound threads available. This can be critical if the threads have only a limited tensile strength. In this case, the winding can be relatively soft.

Another way to influence the structure of the roll is to make a press roll on the winding during winding, so that the press roll can act with a certain pressure on the roll. However, this is so far not possible with the use of a dividing device with a handle, because the press roll collides with the handle of the dividing device. This then leads either to damage of the press roll or damage to the handle. Both are undesirable. Also, because the bands can have different widths, the press roll can not be limited to a predetermined axial extent.

The invention has for its object to expand the possibilities for influencing the winding structure.

This object is achieved in a method of the type mentioned in that hiring a press roller to the winding when the winding has reached a radial thickness which corresponds at least to the radial extent of the handle.

In this way, one makes use of the beneficial effects of the press roll also in the production of a chain, in which one uses a dividing device with a handle. The warping process, ie the generation of the chain, can then proceed to a high degree automatically. When a tape is finished wound, then you can move the divider with the handle in the offset direction, ie parallel to the axis of the warping drum, for example, by attacking a pair of pliers or other handling machine on the handle. The winding structure is positively influenced by the press roll. However, this influence is limited to an area of the coil which starts radially outside the extension of the handle. However, this is not critical, because the radial extent of the handle is substantially less than the radial thickness of the roll itself. It can therefore be accepted that a portion of the roll has a different structure, for example, a lower density than the main part of the roll.

Preferably, the tape is offset at winding speed parallel to the axis of the warping drum at an offset speed and changes the offset speed when hiring the press roll to the winding. If one adjusts the press roll to the winding, that is applied to the winding by means of the pressure roller by an external pressure, then the winding hardness of the forming coil increases. At the same time, the density increases slightly, so that the diameter increase of the coil per revolution is lower. This effect can be easily taken into account by changing the offset speed, ie the size of the Offset parallel to the axis of the warping drum per revolution, so that it can still be ensured that the bands can follow during winding in the cone angle of the cone section of the warping drum.

Preferably, at least one parameter of the roll is stored at the time of setting the press roll on the roll and, with subsequently wound tapes, the press roll is applied to the roll when the roll again has the parameter. The parameters used can be, for example, the number of revolutions of the warping drum already made or the radial thickness of the reel. If you copy subsequent bands, so to speak, then you avoid the risk of over or underrunning the tape approaches. The chain then gets improved uniformity in the width direction.

Preferably, in a subsequent belt, after adjusting the press roll, the same change in the offset speed is set. This also serves to produce a subsequent band, so to speak as a copy of a previously wound tape.

Preferably, an outer divider is used with a gripping area and removes the press roll from the roll before the roll reaches a radial thickness at which the press roll collides with the gripping area. In many cases you have to divide not only at the beginning of the chain but also at the end. For this purpose, one can use, for example, the outer dividing device. Since the outer dividing device to be relocated at each new band must, a gripping area is also provided here, which can be detected either manually or with the help of a handling machine to perform the offset. However, there is also the danger here that the press roller collides with the gripping area because the gripping area protrudes laterally on the free side of the reel. This problem can be counteracted simply by turning the press roll off the roll before such a collision occurs. Instead of the radial thickness, one can also use another parameter, for example the axial displacement movement of the press roll following the offset of the bands. But since the offset and the radial thickness over the cone angle in a fixed relationship to each other, resulting in both parameters, the same effects.

Preferably, after the removal of the press roll, the offset speed is changed. After lifting the press roller, the winding will again get a different density and thus hardness. Thus, then the displacement speed can be changed again to ensure that the forming coil follows the cone angle of the conical surface of the warping drum.

The object is achieved in a Konusschärvorrichtung of the aforementioned type in that a press roller is provided with a positioning drive and a movement limitation radially inward.

It is therefore possible to operate the cone-sharpening device with a press roll even if a dividing device with a handle is used. By the movement limitation radially inward avoids that the press roller collides with the handle and the press roller and / or the handle is damaged. The warping process can be performed at least largely automated with such a cone sharpening device. When a tape of the required length has been finished wound, the warping drum is stopped and the divider is offset by the width of the tape. When the new tape is wound, this again happens under changing conditions. First, a winding without pressing roller takes place. Only when the winding is so thick that when hiring the press roller is no longer a danger that the press roller collides with the handle, the press roller comes into effect. In order to simplify the movement control, this can be done in a simple manner by providing a movement limit for the press roll. It can not be moved so far radially inward in any case, that it collides with the handle.

Preferably, the movement limit is formed as part of the positioning drive. The movement limit can be designed differently. It can be easily formed by a mechanical stop that allows movement of the press roll radially inward only up to a predetermined position. The movement limitation can also be embodied in the control of the positioning drive, for example by a limit switch, a program control or the like.

The positioning drive preferably has a movement component in the offset direction. The press roller thus follows the offset of the tape being wound parallel to the axis of the warping drum. Thus, the press roll moves, so to speak, parallel to the cone section of the warping drum, so that the press roll must be only slightly wider than the tapes with the largest width.

It is preferred that the positioning drive has an offset movement limit. This embodiment is particularly advantageous if an outer dividing device with a gripping area is used. The gripping area projects axially over the previously wound strip. The press roll is not only moved radially outwardly during winding of the following belt, but also in the offset direction. At a certain radial thickness of the strip thus formed, the press roll has then been offset so far in the axial direction of the warping drum that there is a risk of collision with the gripping area. Before such a collision occurs, the press roll is lifted from the roll and the remainder of the tape is wound unaffected by the press roll. In this case, the coil has three sections, wherein a radially middle section has been wound under the influence of the press roller, while the radially outer and the radially inner sections have been wound without influence of the press roller. However, such a winding can be configured overall with improved properties compared to a winding which has been produced completely without a press roll. The sections of the roll wound without the influence of the press roll are in the radial direction so thin that the lack of influence of the press roll has no major negative effects.

Fig. 1

eine stark schematisierte Darstellung einer Konusschärmaschine zu Beginn eines Wickelvorganges,

Fig. 2

die Konusschärmaschine in einem fortgeschrittenen Stadium des Wickelns,

Fig. 3

die Konusschärmaschine in einem weiter fortgeschrittenen Stadium des Wickelns und

Fig. 4

die Konusschärmaschine am Ende eines Wickelvorganges.

The invention will be described below with reference to a preferred embodiment in conjunction with the drawings. Herein show:

Fig. 1

a highly schematic representation of a cone warping machine at the beginning of a winding process,

Fig. 2

the cone warper in an advanced stage of winding,

Fig. 3

the cone warping machine in a more advanced stage of winding and

Fig. 4

the cone warper at the end of a winding process.

A cone warping machine 1 has a warping drum 2, which has a cylindrical portion 3 and a conical portion 4. The warping drum is rotated by a drive 5 shown only schematically.

From a gate, not shown, in which a coil is arranged for each thread, several threads are drawn parallel to each other. The group of threads from the parallel adjacent threads is also referred to as "band". Such a band is, when the warping drum 2 rotates, pulled on the circumference of the warping drum 2 and thereby forms a winding. 6

The winding 6 is shown here for reasons of clarity only at the bottom of the warping drum 2. Of course, the winding 6 surrounds the warping drum 2.

The lower layer of the tape is placed on the cylindrical portion 3. All other layers of the strip are offset by a small distance in the offset direction, ie parallel to the axis of the warping drum 2, in each revolution of the warping drum 2 (to the left in the present embodiment), so that the winding 6 follows the conical section 4 of the warping drum 2. This offset is effected by guiding the tape over a guide means arranged on a shear table 7. The shearing table 7 is moved in each direction of the warping drum 2 by a small direction in the offset direction (arrow 8).

On the tendering table 7, a press roller 9 is arranged, which can be moved radially in the direction of the warping drum 2. For this purpose, only a schematically illustrated positioning drive 10 is provided. The positioning drive 10 is able to move the press roller 9 in the direction of the reel 6 and to let the press roller 9 act on the reel 6 with a certain pressure, which may also be adjustable. The positioning drive 10 can also cause the displacement movement of the shear table 7.

To produce a chain, it is usually necessary to separate individual threads from each other and assign them to different groups. For this purpose, a dividing device is provided, of which only one handle 11 can be seen, which in the radial direction something projects beyond the cylindrical section 3 of the warping drum 2. The handle 11 is connected to a cord or a belt which is housed in the conical section 4 of the warping drum 2 and can be pulled through the winding 6 during movement of the handle 11.

The handle 11 would now, when the press roller 9 is brought to bear against the winding 6, collide with the press roller 9. This would lead to damage of the press roll 9 and / or the handle 11. Both are undesirable and must be prevented.

The press roll 9 is thus, as in Fig. 2 can be seen, only brought to rest against the winding 6 when the winding 6 has reached a radial thickness which is greater than the radial extent of the handle 11. To preclude a collision between the press roller 9 and the handle 11, the Positioning 10 on a movement limit, with which is prevented that the press roller 9 is so far approximated to the warping drum 3 that a collision between the handle 11 and the press roller 9 occurs.

Once the press roller 9 abuts the winding 6 and can exert a certain contact pressure on the winding 6, the winding 6 is wound with an increased density. This is in Fig. 3 shown. The coil 6 then consists of two sections, namely a section 6a, which has been wound without the influence of the press roll and has a slightly lower density than a section 6b, which is wound under the influence of the press roll has been. The different densities are represented by different hatching.

If the press roller 9 rests on the winding 6 and exerts a contact pressure on the winding 6, then the diameter increase of the roll 6 per revolution of the warping drum 2 is less than without the action of the press roll 9. Accordingly, the size of the displacement movement per revolution of the warping drum. 2 Since one still wants to make sure that the winding 6 hinzuschert the cone-shaped portion 4 of the warping drum 2, the size of the displacement movement of the shear table 7, which is both the guide means for the yarn sheet or the band as well as the press roller 9 carries, lower, when the press roller 9 is made to the winding 6 and exerts a contact pressure on the winding 6. The offset speed, ie the size of the offset per revolution of the warping drum 2, is thus reduced accordingly when the press roller 9 acts on the winding 6.

The handle 11 is disposed on an inner dividing device, which forms a compartment at the end of the chain when unwinding the chain from the warping drum 2. In order to be able to form a compartment or a partition at the beginning of the chain, an outer dividing device is provided, of which only one gripping region 12 can be seen ( Fig. 4 ). This gripping region 12 projects in the axial direction over the winding 6, so that the pressing roller 9 could come into conflict with the gripping region 12 due to the offset movement. To such a collision between the press roller 9 and the To avoid gripping area 12, the press roller 9 is lifted off the reel 6 before the press roller 9 can collide with the gripping area 12. This results in a third section 6 c of the roll 6, which is also wound without the influence of the press roll 9. The third section 6c of the coil 6 then again has a slightly lower density than the middle section 6b. Accordingly, the amount of offset movement per revolution of the warping drum 2 is again slightly larger than in the middle section 6b.

A control device not shown stores various parameters of the winding process of the first band, ie the immediately adjacent to the conical section 4 portion of the coil 6. These parameters include not only, as is already known, the winding course, ie the increase in Thickness over the number of revolutions. It also stores the time or the number of revolutions of the warping drum 2, in which the press roller 9 is made to the winding 6. Furthermore, the time (or the number of revolutions of the warping drum 2) is also stored, at which the press roller 9 is lifted off the reel 6. Then, later, when further ribbons are wound following the first roll, the nip roll 9 is brought into contact with or out of contact with the roll 6 at exactly the same time as the first ribbons. The winding process of the other bands thus takes place as it were as a copy of the winding process of the first band.

Claims (10)

Method for producing a chain, in which a warping drum (2) is rotated, thereby winding at least one strip formed from a group of yarns onto the warping drum (2) and thus producing a winding (6), using at least one inner dividing device which a protruding from the winding (6) end is provided with a handle (11) having a predetermined radial extent, characterized in that a press roll (9) to the winding (6) hires when the winding (6) a has reached radial thickness which corresponds at least to the radial extent of the handle (11). A method according to claim 1, characterized in that the tape when winding parallel to the axis of the warping drum (2) offset at an offset speed and the offset speed changed when the press roller (9) to the winding (6) hires. Method according to claim 1 or 2, characterized in that at least one parameter of the roll (6) is stored on the roll (6) at the time of setting the press roll (9) and in the case of subsequently wound rolls the press roll (9) on the roll (6). 6) when the reel (6) again has the parameter. A method according to claim 3, characterized in that one adjusts the same change in the offset speed in a subsequent band after setting of the press roll (9). Method according to one of claims 1 to 4, characterized in that one uses an outer dividing device with a gripping area (12) and the press roller (9) from the winding (6) before the winding (6) reaches a radial thickness, in the the press roll (9) collides with the gripping area (12). A method according to claim 5, characterized in that after the removal of the press roller (9) changes the offset speed. Cone-sharpening device (1) with a warping drum (2) and at least one inner dividing device, which has a handle (11) with a predetermined radial extent to the warping drum (2), characterized in that a press roll (9) with a positioning drive (10) and a movement limitation is provided radially inwardly. Konusschärvorrichtung according to claim 7, characterized in that the movement limit is formed as part of the positioning drive (10). Cone-sharpening device according to claim 7 or 8, characterized in that the positioning drive (10) has a movement component in the offset direction (8). Cone-sharpening device according to claim 9, characterized in that the positioning drive (10) has an offset movement limit.

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