EP2804970A1

EP2804970A1 - Pressure roller

Info

Publication number: EP2804970A1
Application number: EP13701735.6A
Authority: EP
Inventors: Uwe Münster; Thorsten Wawra
Original assignee: Oerlikon Textile GmbH and Co KG
Current assignee: Oerlikon Textile GmbH and Co KG
Priority date: 2012-01-19
Filing date: 2013-01-17
Publication date: 2014-11-26
Also published as: WO2013107806A1

Abstract

A pressure roller for a crimping device of a staple fibre system for chemical fibres is described which rotates and transports the fibre tape and the temperature of which is controlled during said process by a medium that flows through at least one channel arranged in the region of the roller surface. In order to achieve even small widths of the rolling element, the surface of which forms the actual functional surface of the pressure roller, in a design comparable to pressure rollers already known and the associated production methods, a special arrangement of the supply and return for the medium in the rolling element upstream and downstream of the channel is selected. In particular, the arrangement of the supply and return relative to each other enables a clear reduction of the previous width of the rolling element.

Description

platen

The invention relates to a pressure roller of a crimping device of a staple fiber plant for man-made fibers, which rotates and transports the sliver and is tempered during the process by a medium which flows through channels in the vicinity of the roll surface.

In the production of staple fibers from chemical fibers, it is known that in the processing process, the fiber cable is crimped in a treatment stage. The crimping is produced by means of a device which works according to the so-called stuffer box principle. For this purpose, a nip between two rotating driven pressure rollers is formed. In extension of the nip a stuffer box is formed, which is arranged directly after the crimping rollers. The stuffer box is formed by chamber walls, wherein between the pressure rollers and an upper and a lower chamber wall, a preferably adjustable sealing gap is formed. Such a device is known for example from US 4,730,371. For Stauchkräuseln now the fiber cable is first passed through the nip between the pressure rollers. This creates a curl on the outlet side of the pressure rollers by changing bending of the fiber cable. The result of the crimping in the fiber cable is also determined by the temperatures present. In order to be able to maintain a corresponding temperature level in the process, the pressure rollers are tempered. In most cases, a cooling of the rollers is required. For this purpose, the pressure rollers in the outer region, which comes into contact with the fiber cable, flowed through by a medium. To pass the medium through the pressure rollers, they have a supply and discharge for the medium, which are designed so that the Connections to the pressure rollers also work properly with rotating rollers. Next are arranged between the roll ends and arranged in the region of the roll surface channels headers and returns. Since the pressure rollers have different diameters and due to the selected manufacturing methods, these heats and returns are arranged obliquely to the roller center line. Such an embodiment is shown in CN 2765920 Y.

In addition to the tendency for larger rolls which have a wider area for transporting the fiber tow, which thus may also have a greater mass per unit length, there is also the requirement for low mass throughput processes. For example, to realize a pilot plant or the possibility of combining several devices with a partial mass flow, which can then be operated with different processes, to an overall device that generates a higher mass flow. In these devices, which produce a lower mass flow, it is necessary to choose the width of the working range of the pressure rollers accordingly with a smaller dimension. In order to have the possibility of influencing the roller temperature also in these embodiments, the flow through the pressure roller in the region of the functional surface with a medium is also required in these embodiments to allow the same conditions in the process as in rollers with larger widths.

Due to the manufacturing methods used to produce the pressure rollers and the associated oblique arrangement of the headers and returns, however, a minimum distance in the heats and returns is required. Therefore, it is not possible with pressure rollers, as previously used for a flow with a medium to realize the sometimes small widths of the required for experimental, pattern or sub-systems rolls, without to dispense with the possibility to use a corresponding temperature, as was previously used in wider pressure rollers.

Accordingly, it is an object of the invention to provide a generic device for Stauchkräuseln a fiber cable of the type mentioned in such a way that even at low working widths of the pressure rollers, a corresponding temperature of the roll surface is possible.

Another object of the invention is to provide an apparatus for stuffer box crimping of manmade fibers in which the rolls can be made with partially comparable manufacturing techniques.

Since hitherto known embodiments of pressure rollers can have the flow and return to a plane due to the larger width of the roller body, because the distance between the flow and return is large enough, it is a further object of the invention, the previously known arrangements of each individual Vor¬ or return and the associated production methods as far as possible to maintain and only the assignment of flow and return to each other to change.

This object is achieved by a device having the features of claim 1.

Advantageous further developments are defined by the features and feature combinations of the subclaims.

The invention is characterized in that small widths of the pressure rollers can be combined with a temperature control by a medium, so To realize a process, as it is also known from devices with larger widths of the rolls.

The invention selects an arrangement of the obliquely arranged headers and returns in the roll body, in the flow and return are not in the same plane with respect to the center axis of the pressure roller. Thus, it is possible to reduce the width of the pressure roller, without leading and return come into collision. In one-piece printing rolls, the simplest form of channels in the area of the roll surface is a hole. This also applies to the shape of the slanted feeders and returns.

If the obliquely arranged headers and returns are each directly, so without further elements such as a distribution area, connected to the channel arranged in the outer region, they must each lie on a plane that does not include the central axis of the platen or these maximum each cuts in one point. If at least two channels are connected in the peripheral region of the pressure roller by at least one connecting region on the headers and returns, it is possible to arrange the flow closer to the one channel and to arrange the return closer to the other channel, whereby the flow or return are not in the same plane that they form with the closer channel. There is at most one cutting line between the two planes, which can also be the center axis of the pressure roller. By this arrangement of the headers and returns, it is possible to position them each in a plane with the center line of the pressure roller, whereby the previous arrangements individually for flow or return even for smaller widths of Pressure roller can be performed. Also, so the same manufacturing method for the flow and returns can be further applied.

Instead of the connection of two channels in the outer region of the roller body, the use of only one channel is possible, which is connected directly to the flow and a connection area with the return. Also, the arrangement of the connection area between flow and channel would be possible and to connect the return directly to the channel. However, such an arrangement has larger areas between the channels, resulting in a more uneven temperature.

The channels in the peripheral area of the pressure roller have closing elements at the ends, which close them off from the environment, but allow a flow of the medium between the channels and the feeds and return passages or the connecting areas. These closure elements can have a wide variety of shapes. These can individually cover only one end of a channel or even several ends. Since it is a largely rotationally symmetrical body in the pressure roller, the use of one ring per side or even several elements that are arranged in a ring, for closing the channels to the outside makes sense.

If the pressure roller between the channels contains connection areas, this must be taken into account in the execution of the closure elements. In order not to have additional surfaces to be sealed, the use of a maximum of one closure element per connection area makes sense.

The connection region between the individual channels in the peripheral region can be formed by a shaping in the pressure roller or by a shape in the closure elements. Also, a combination of formations in the pressure roller and in the closure elements is possible.

With all arrangements of the inclined feed and return, it must be ensured that all feeders are connected to the feed at the end of the shaft and all returns to the discharge at the end of the shaft. This may require that additional elements such as additional annular connection areas be required to provide a continuous connection between all areas.

The supply and discharge of the medium in the pressure roller and out of this can be done together at the one end of the shaft for the supply and at the other end of the shaft for the discharge or at one of the two shaft ends for supply and discharge.

Some embodiments will be described in more detail below with reference to the accompanying drawings.

They show:

Fig. 1 shows schematically a cross-sectional view of a first embodiment of the inventive rolling body

Fig. 2 shows schematically a further cross-sectional view of the first embodiment of the roller body according to the invention, which shows a plane perpendicular to the plane of FIG. 1 level

Fig. 3 shows schematically a cross-sectional view of a second embodiment of the roll body according to the invention, are arranged in the supply and discharge on one side 4 shows schematically a cross-sectional view of a third exemplary embodiment of the roller body according to the invention, in which a connection region is arranged between two channels.

Fig. 5 shows schematically a further cross-sectional view of the third embodiment of the roller body according to the invention, which shows a plane perpendicular to the plane of FIG. 4 level.

A medium 3 is not shown in FIG. 2 and FIG. 5 for the sake of clarity. In FIGS. 1, 3 and 4, the medium 3 is shown only in part. The medium may be water or other suitable for temperature control materials such as an oil, a coolant or a heat transfer medium.

In Fig. 1, a first embodiment of the device according to the invention is shown schematically in a section through a center line of a feed 8 of a roller body 2. Adjacent areas of a pressure roller 1 are only partially and not shown in section for the sake of simplicity. Fig. 2 shows a section perpendicular to the central axis 20 of the pressure roller 1 in the region near an end face 7 of the roller body 2. The following description applies, as far as no explicit reference is made to one of the figures, for both figures.

The pressure roller 1 consists of a roller body 2 and other elements, for example, for storage or provision of the medium 3, which are not or only partially shown here. It is possible to manufacture the roller body 2 and further elements, for example the area for positioning the bearing, in one piece without a parting line. In the roller body 2 is a channel 4 in the vicinity of a roller surface 5, which extends from one end face 6 of the roller body 2 to the other end face 7 of the roller body 2. In Fig. 1, the channel 4 is arranged parallel to the roller surface 5. It is also possible not to arrange the channel 4 parallel to the roll surface 5. Further, it is also possible not to execute the channel 4 straight.

The channel 4 is connected on one side with a flow 8 and on the other side with a return 9. Further, the supply 8 are connected to a supply 10, which allows the inflow of the medium 3 in the roll body 2, and the return 9 connected to a discharge 11, which allows the outflow of the medium 3 from the roll body 2.

The feed 8 and the return 9 are arranged obliquely to the central axis 20 of the Walzenkör- pers 2, wherein the orientation is such that the distance between two points that are the same distance to the connection of the flow 8 and return 9 to the channel are located and each lie on the center line of the flow 8 and return 9, in a region 12 is lower. The angles forming the flow 8 and return 9 with the channel 4 do not have to be the same. The region 12 is shown in FIG. 1, FIG. 3 and FIG. 5 only for the respective forward flow 8 or return 9 lying in the sectional plane.

The above-described oblique arrangement of flow 8 and return 9 is used, for example, in a straight run of flow 8 and return 9, as it results from the use of a bore, not to get into the area of the roll surface 5, when the cutting area of channel 4 and flow 8 and return 9 in the vertical region between the roller surface 5 and central axis 20 of the roller body 2 is located. This is especially true required, when the roller body 2 is made with adjacent elements of the pressure roller 1 in one piece.

The feed 8 and return 9 must not touch or run through at any point in order to exclude a direct exchange of the medium 3 between flow 8 and return 9. For this purpose, it is necessary that the flow 8 and return 9 do not span a common plane when small widths of the roller body 2 are to be realized. Only when the flow 8 and return 9 are moved in a common projection plane by rotating the cutting planes of their center lines around the central axis of the roller body 2, a cutting line may arise.

The channel 4 has at both its ends in the region of the end faces 6 and 7 closure elements 13 and 14, which complete it against the environment. The flow of the medium 3 between the flow 8 and channel 4 or channel 4 and return 9 should not be affected by these closure elements 13 and 14.

The embodiment shown in Fig. 1 and 2 is characterized by the order of flow 8 and return 9, so that even small widths of the roller body 2 can be realized without advantages such as production of the pressure roller 1 from a largely piece and Application of the previous manufacturing methods and design details must be abandoned. In order to remove the medium at the same end of the pressure roller 1 after the flow through the roller body 2, to which it was previously provided, supply 10 and discharge 11 can be arranged in conjunction with flow 8 and return 9, and the channel 4 accordingly. For this purpose, a further embodiment of the device according to the Invention is shown in Fig. 3. The structure and function of the embodiment of FIG. 3 is substantially identical to the embodiment of FIG. 1 or FIG. 2, so that at this point only the differences will be explained and otherwise reference is made to the aforementioned description.

The embodiment of Fig. 3 is characterized in that both supply 10 and discharge 11 are arranged on the same side of the roller body. The supply 10 is connected to a passage 15, which in turn is connected to the supply line 8 in order to provide a connection between supply 10 and the beginning of the supply line 8 and thus to ensure the flow of the medium 3 in this area. The end of the return 9 is connected via a connecting region 16 with the discharge 11. This is necessary if the position of the end of the return at the end 6 is different from the position of the discharge 11. This connection region 16 can also be used to optimize the flow conditions of the medium. This can also be done in the region of the transition from execution 15 and flow 8 by integration of an additional connection area. Such a connection region is not shown in the embodiment of FIG. The return 9 is arranged in Fig. 3 so that there is a distance from the passage 15 and no penetration of these two elements takes place. This also applies to the connection region 16, which is likewise positioned at a distance from the bushing 15 and also from the feeder 10. In the embodiment of FIG. 3, the angle between return 9 and central axis of the roller body 2 in the projection in the plane which is spanned by the channel 4 and the central axis of the roller body 2 is less than that of the lead 8 with the central axis of the roller body 2 at Projection into this plane. The design of flow 8 and return 9, as well as the arrangement of flow 8 and return 9 to each other are comparable to the embodiments of FIGS. 1 and 2 and differ only in features that for the realization of the supply of the medium. 3 on one side of the pressure roller 1 are necessary.

The arrangement of flow 8 and return 9 or feed 10 and discharge 11 can be reversed, so that the outflow of the medium 3 takes place through the roll body. Also, the use of other connection areas or additional elements is possible to form the flow 8 and return 9 and supply 10 and discharge 11 for the flow of the medium deviating from the variant shown in the embodiment. Other embodiments for realizing the device according to the invention are also possible in order to realize feed 10 and discharge 11 on one side of the pressure roller 1.

In the previous exemplary embodiments of FIGS. 1 to 3, supply line 8 or return line 9 were never arranged in a plane perpendicular to the roll surface 5 of the roller body 2 from the center axis 20 of the roller body 2. Under certain conditions, it would be possible to place either the flow 8 or the return 9 in this level, but not at the same time, otherwise a penetration of the elements would have taken place, and it would also be the position of the return 9 and flow 8 to be adjusted accordingly ,

In the embodiment of Fig. 4, an embodiment of a roller body 2 according to the invention is shown in which both flow 8 and return 9 respectively lie on a plane which is spanned by the central axis of the roller body 2 perpendicular to the roller surface 5 of the roller body 2.

This is made possible by a distribution region 17 is arranged between two channels 4, which connects the two channels 4 together. Further, the flow 8 is directly connected to the one channel 4 and the distribution area 17. Since the second channel 4 is also connected to the distribution area 17, the flow 8 is also indirectly connected to the second channel 4 via the distribution area 17.

The return 9 is directly connected to the one channel 4, which is connected via the distribution area 17 with the flow 8. Indirectly connected is the return via a second distribution region 17 with the other of the two channels 4, which is connected directly to the flow.

Thus, it is possible to use the plane used in wider rolls of lead 8 and return 9 once for the lead 8, in the plane of one channel 4, and once for the return 9, in the plane of the other channel 4 and so on to realize the roller body 2 with small widths, which are comparable to previous pressure rollers, for example, in the arrangement of the flow 8 or return 9 to the channels 4, as they are based on the invention.

In FIG. 4, the right-hand distribution region 17 is formed by a formation 18 in the closure element 13. However, it is also possible to form the distribution area 17 by a formation 19 in the roll body 2, as shown at the left distribution area 17. Furthermore, the combination of a formation 18 in the closure element 13 and a formation 19 in the roll body 2 is also possible. Further, all embodiments and further embodiments according to the invention can also be implemented with multiple channels, wherein a symmetrical arrangement along the roll surface 5 of the roll body 2 is particularly useful to achieve a uniform temperature of the entire roll surface 5 through the medium 3. In relation to the embodiment of FIG. 4, this then means more than two channels 4.

It is also possible to connect more than two channels 4 with distribution areas 17 and thus to reduce the number of necessary headers 8 and returns 9, if a plurality of channels 4 in the area of the roll surface 5 of the roll body 2 is arranged.

If more than two channels are arranged in the area of the roll surface 5 of the roll body 2, the same channels 4 do not always have to be connected by a distribution area 17 in order to ensure the flow of the medium 3 between the respectively associated feeds 8 and returns 9.

The closure elements 13 and 14, which delimit the channels 4 from the environment, are designed in the exemplary embodiment of FIG. 4 such that they respectively cover the ends on one end face 6 or 7 of two channels 4. The closure element 13 or 14 can also be designed so that it has per end face 6 or 7 in the form of a ring or consists of several elements which together form a ring or are arranged comparably. A possible width of the roller surface 5, which forms the actual functional surface of the pressure roller 1, is 30-150 mm. This range is particularly useful because widths above 150 mm can also be produced in one embodiment of the roller body 2 of the pressure rollers 1, as they are already known. For widths below 30 mm, the possibilities of arranging feed 8 and return Run 9 very limited due to the required for the overall device and its function diameter of the roller body 2.

LIST OF REFERENCE NUMBERS

1 pressure roller

2 roller bodies

3 medium

4 channel

5 roll surface

6 front side

7 front side

8 lead

9 return

10 feeder

11 exhaustion

12 area

13 Closing

14 lock

15 implementation

16 connection area

17 distribution area

18 shaping

19 formation

20 central axis

25

Claims

claims

Pressure roller in a crimping device of a staple fiber plant for man-made fibers with a roller body (2) having at least one in the region near the roller surface (5) arranged channel (4) on one side an oblique to the roller center run (8), with a feed (10) is connected to one of the end faces (6, 7), and on the other side a likewise inclined to the roll center return (9) connected to a discharge (11) on one of the end faces (6, 7) has, and can be traversed by a medium (3), which can be used for tempering the roll surface (5),

characterized in that

the lead (8) and the return (9) in the area between the roll surface (5) of the roll body (2) and the central axis (20) intersect with the projection in a sectional plane by rotation about the central axis (20).

Device according to claim 1,

characterized in that

the channel (4) is a bore.

3. Apparatus according to claim 1 and 2,

characterized in that

at least the flow (8) or the return (9) is a bore.

4. Apparatus according to claim 1 to 3,

characterized in that

in the area near the roll surface (5) a plurality of channels (4) are provided.

Device according to claim 4,

characterized in that

a plurality of channels (4) are interconnected by a distribution area (17).

Apparatus according to claim 5.

characterized in that

at least a part of the distribution region (17) by forming an off formation (19) in the roll body (2).

Apparatus according to claim 5 or 6,

characterized in that

at least part of the distribution area (17) is formed by forming a formation (18) in a closure element (13, 14).

Apparatus according to claim 5 to 7,

characterized in that

the channels (4) are closed laterally by one or more closure elements (13, 14) and that the closure element (s) (13, 14) is or are formed as a ring, so that a connection to the flow (8) or return ( 9) and / or a distribution area (17).

Device according to claims 1 to 8,

characterized in that

the supply (10) and discharge (11) on the same end face (6, 7) of the roller body (2) are arranged.

10. Apparatus according to claim 1 to 9, characterized in that

the width of the warmer surface (5) of the roll body (2) carries 30-150.