EP3382070A2 - Carding machine - Google Patents

Abstract

The invention relates to a carding machine with an inlet side (1a) for fiber flakes, which are fed to a pre-drum (4) and resolved to single fiber and aligned, with a first layer of bobbin by means of an upper doffer roll (7) to a transfer roller (9) and then is transferred to a spool (11), wherein a second layer of batt is transferred by means of a lower doffer roller (8) to a transfer roller (10) and then to the spool (11), wherein at least one layer of bobbin by means of at least one doffer roller (14 ) are removed for further processing from an outlet side (1b) of the carding.

The invention is characterized in that the transfer rollers (9, 10) have the same diameter.

Furthermore, the invention comprises a trough for use in a carding machine.

Description

The invention relates to a carding machine with an inlet side for fiber flakes, which are supplied to a pre-drum and dissolved to single fiber and aligned, wherein a first layer of batt is transferred by means of an upper doffer roll to a transfer roller and then to a spool, wherein a second layer bobbin by means a lower doffer roll is transferred to a transfer roll and then to the spool, wherein at least one layer of bobbin are deducted by means of at least one doffer roll for further processing from an outlet side of the carding. Furthermore, the invention relates to an associated trough.

On carding fiber flakes are dissolved to the single fiber. The nonwoven produced therefrom generally consists of fibers which are oriented in a certain direction, which may be predetermined by the machine direction (MD), for example. These webs have a high strength in the longitudinal direction, but in the transverse direction (Cross Direction = CD) is low. The longitudinal orientation of the fibers can be counteracted by, for example, influencing the gaps between the spool and the worker rolls, or by upsetting the nonwoven emerging from the spool at different operating speeds. However, an upsetting process increases the basis weight of the web produced and thus reduces the production speed of the plant, since the length of the fiber web produced decreases.

The classic card is a tambour, from which the batt is taken in one or two places. In order to increase the resolution of the fiber masses, carding with a pre-drum (pre-bambouring) are known, which can also increase the Kardierleistung at the same speed provided with worker and Wenderwalzen. In this case, the pre-drum has a smaller diameter than the drum. There are also significant differences in the transfer of the fibrous web from the pre-drum to the drum as the transfer of the fibrous web can take place with one or two transfer rollers, which then again have different diameters according to the state of the art.

The EP 0188177 B1 describes a Doppelkrempel with a small diameter pre-drum and a large drum, the transfer of the batt from the pre-drum on the drum with two intermediate pickups of different diameters (double transfer) takes place. An increase in performance could not be achieved because the intermediate customers could not completely remove the batt from the pre-drum. The result is a fiber back storage of up to 35%, which additionally loads the pre-drum during carding.

The object of the invention is to provide a carding machine with a high carding performance and a good mixing of the fibers.

The invention solves the problem by the teachings of claim 1 and 9; Further advantageous features of the invention are characterized by the subclaims.

According to the technical teaching of claim 1, the carding comprises an inlet side for fiber flakes, which are supplied to a pre-drum and dissolved to the single fiber and aligned, wherein a first layer of fiber web is transferred by means of an upper doffer roll to a transfer roller and then to a drum, a second location Fibrous by means of a lower doffer roll to a transfer roller and then transferred to the spool, wherein at least one layer of bobbin are deducted by means of at least one doffer roller for further processing from an outlet side of the carding.

The invention is characterized in that the transfer rollers have the same diameter. The transfer rollers may preferably be operated at the same speed, whereby the two separate layers of batt may be taken over or passed on with the same distortion or the same compression. They also transfer the same amount of fibers.

Preferably, the transfer rollers have at least a diameter of 350 mm, preferably at least 380 mm, more preferably at least 400 mm. The enlargement of the transfer rollers in diameter reduces the peripheral speed with which the batt is transported. Reducing the peripheral speed reduces the centrifugal force acting on the fibers. The fiber fly is thereby reduced, so that the productivity increases with a high carding quality.

In a preferred embodiment, the lower doffer roll is about 50 percent larger in diameter than the upper doffer roll, with both doffer rolls being designed to operate at the same peripheral speed. This constructive design of the doffer rollers creates space for the enlarged transfer rollers. By operating the upper and lower doffer rollers at the same peripheral speed, the separate layers of batt are taken over from the pre-drum with the same draft or the same compression and transferred to the transfer rollers.

Preferably, the upper doffer roll has a diameter of at least 450 mm. Thus, the batt can be transported at a reduced peripheral speed here.

Due to the fact that the doffer rollers have a smaller circumferential speed than the transfer rollers, a stepped distortion of the batt follows the doffer up to the spool.

In a preferred embodiment, the pre-drum has at least the same diameter as the drum. Increasing the diameter of the pre-drum to at least the diameter of the spool allows space to increase the transfer rollers, so that they can be operated at a lower peripheral speed.

In a further advantageous embodiment, a trough is arranged within the carding, which extends over the entire working width, wherein the trough with the lower doffer roller, the two transfer rollers and the spool at least partially forms a gap for guiding the Faserflores. Particularly in the case of light battles and high carding speeds, the trough allows secure guiding of the batt on the rollers.

The trough according to the invention for use in a carding machine extends uninterruptedly over the working width of the carding machine and has three concave areas which, together with associated rollers, form a gap for guiding the batt.

The invention is characterized in that the trough has a fourth concave portion forming an adjustable gap to a fourth roller. Since the trough can extend over a working width of 5 m, small manufacturing tolerances and assembly errors in a non-uniform gap affect what the takeover of the fibrous web of a worsened to the next roller. With the adjustability of the nip to a fourth roll, the assembly can be simplified and a uniform nip can be set on all four rolls.

Preferably, the trough has a first and a second segment, wherein the second segment has a device for adjusting the gap to the fourth roller. The division into separate segments allows for easy production and very accurate adjustability of the trough.

In this case, the first segment with which the gap is formed with three rollers, adjustably attached to a machine housing or frame of the carding. This trough segment is thus mounted between three rollers and adjusted with a uniform gap.

The second segment, with which the gap is formed to the fourth roller, is fastened separately to the first segment adjustable on a machine housing or frame of the carding. Together, both segments form a complete trough that is adjustable to four rolls. The second segment at least partially forms a gap for guiding the batt with two further rollers. Although the contour of two concave areas thus has an interruption through a mounting gap in the trough, the tuft is continuously guided in the gap.

Figur 1:

Eine erfindungsgemäße Krempel mit Doppelübertragung;

Figur 2:

Eine Mulde für den Übergabebereich des Faserflors an den Tambour.

The invention will be explained in more detail with reference to a possible schematically illustrated embodiment. It shows:

FIG. 1:

A card with double transfer according to the invention;

FIG. 2:

A trough for the transfer area of the batt on the tambour.

In FIG. 1 the card 1 according to the invention is shown, which is designed as carding with double transfer and an inlet side 1a for fiber flakes and one or more outlet sides 1b for Faserflor 20 has. Before the inlet side 1a of the carding 1, a feeder, not shown, is arranged, for example, a Rüttelschachtspeiser with which the fiber flakes are deposited on a conveyor belt, not shown. As an alternative to Rüttelschachtspeiser the carding 1 can also be equipped with a card feeder with integrated web thickness measurement, in which the weight is determined by the web thickness measurement, or the fiber flakes of the carding 1 are fed by a direct feed.

In the carding 1, the fiber flakes are fed to the inlet side 1a of the plant and fed via rollers 2, 3, a pre-drum 4, in which the fiber flakes are dissolved and aligned in a first stage to the single fiber. During the transport process of the fiber flakes on the pre-drum 4, turning and worker rollers 5, 6 hold the fibers on the pre-drum 4, so that a first fibrous web 20 is formed. A layer of the batt is taken from the pre-drum 4 from a first upper doffer roll 7 and fed to the spool 11 via an upper transfer roller 9. A second layer of batt is taken from the pre-drum 4 by a second lower doffer roller 8 and transferred from a lower transfer roller 10 to the drum 11. On the spool 11, the further dissolution and alignment of the fiber flakes takes place to a batt, here also Wender- and worker rolls 5, 6 hold the fibers on the spool 11, so that a fibrous web 20 forms. The batt 20 is deposited on two conveyor belts 17 by means of two doffer rollers 14, compression rollers 15 and transfer rollers 16 and subsequently combined and further processed into a single batt in an outlet side 1b. In this embodiment, the spool 11 rotates clockwise (right) and passes the generated batt 20 to an upper and a lower counter-rotating (left) doffer roller 14. So that the batt 20 can be transferred from the spool 11 to the doffer rollers 14, is set between Tambour 11 and doffer rollers 14 a very small gap. Furthermore, the surface of the pickup rollers 14 is designed so that between the roller surface and the fibers to be transferred can form a positive connection. One or more upsetting rolls 15, 15 'adjoin the take-off rolls 14, as well as a take-off unit in the form of a circulating conveyor belt 17, which optionally can be equipped with one or more transfer rolls 16. In the FIG. 1 illustrated carding 1 is equipped with a lower and an upper take-off unit and can thus produce two separate layers Faserflor 20. It is of course also possible to equip the carding 1 with only one or more than two deduction aggregates. As an alternative to this embodiment may be arranged between the spool 11 and the doffer rollers 14 each have a further roller, which may be formed as a random roller. Due to their peripheral speed, direction of rotation and tooth position, the random rollers produce a special random position in the batt 20, which is compressed and reoriented by the following doffer rollers and upsetting rollers 14, 15, 15 '.

The peculiarity of the invention is that the transfer rollers 9, 10 were enlarged in comparison to the prior art and both have the same diameter and are operated at the same speed. Due to the diameter increase to at least 350 mm decreases the peripheral speed and thus the centrifugal forces fall on the fibers, whereby the fiber fly is reduced. Preferably, the transfer rollers 9, 10 have a diameter of at least 380 mm, more preferably at least 400 mm. Because both transfer rolls have the same diameter, they also transfer the same amount of batt. The operation of both transfer rollers 9, 10 at the same speed ensures the transfer of the batt on the spool 11 for the same delay.

In order to make room for larger transfer rollers 9, 10 due to the structural conditions, the upper doffer roller 7 has a smaller diameter than the lower doffer roller 8, both of which are operated at the same peripheral speed. Preferably, the lower doffer roller 8 has a diameter about 50% larger than the upper doffer roller 7. Advantageously, both doffer rollers 7, 8 have the same peripheral speed. Due to the diameter relation of upper 7 to lower doffer roller 8, the fiber back-up on the pre-drum 4 can be reduced. Preferably, the lower doffer roll 8 has a diameter of at least 650 mm, and the upper doffer roll 7 has a diameter of at least 450 mm.

Preferably, the pre-drum 4 has at least the same diameter as the spool, wherein the spool 11 can be operated at a same or a higher peripheral speed. The enlargement of the diameter of the pre-drum 4 to at least the diameter of the main cylinder 11 allows with the least design effort to create the space, whereby the transfer rollers 9, 10 can be increased to operate at a lower peripheral speed.

The fact that both pickup rollers 7, 8 have a significantly lower peripheral speed than the pre-drum 4, there is a uniform compression in each layer of the batt.

With the transfer of the batt of the doffer rollers 7, 8 on the transfer rollers 9, 10 is again an extension of the batt, since the transfer rollers 9, 10 have a higher peripheral speed. Advantageously, the transfer rollers 9, 10 have the same diameter. Due to the same peripheral speed of the doffer rollers 7, 8 and the same peripheral speed of the transfer rollers 9, 10, both layers of batt are equally stretched. A further extension of the batt results from the transfer of the transfer rollers 9, 10 on the spool 11, wherein the peripheral speeds of the transfer rollers 9, 10 are equal, the peripheral speed of the spool 11 but has at least three times. The individual layers Fibrous are then further mixed by the turning and worker rolls 6, 7 on the spool 11 and the fibers are dissolved and aligned into a batt 20.

The decrease of the batt from the tambour 11 is carried out in the embodiment by two doffer rollers 14 with the same diameter and the same speed.

The following exemplary embodiment relates to the configuration of an exemplary carding machine with a working width of 2.5 m. The diameters of the rollers are given without the height of the clothing. Roller Pos. Roll diameter [mm] Speed [m / min] Rolling direction of rotation 3 413 480 right 4 1500 1750 right 7 550 300 Left 8th 850 300 Left 9 413 405 Left 10 413 405 Left 11 1500 1750 right 14 550 550 Left

Because the doffer rollers 7, 8 have the same speed and also the transfer rollers 9, 10 are operated at the same peripheral speed, the same distortion or the same compression always takes place for both layers of batt. The increase in the roll diameter of the transfer rolls 9, 10 allows operation at a lower peripheral speed, whereby the applied centrifugal forces are lower on the batt than in the prior art. The card can be operated with a higher productivity with a high carding quality.

The transfer of the two layers of fiber web 20 from the transfer rollers 9, 10 on the spool 11, is favored by a trough 12, the transfer points of the batt clings to four rollers and thus holds the batt on the rollers. The transfer area from the lower doffer roller 8 to the transfer roller 10, from the transfer roller 10 to the spool 11 and from the transfer roller 9 to the spool 11 are hereby chambered, whereby the layers of batt are precisely guided. The trough 12 thus has four concave curves, which engage in the outer circumference of the doffer roller 8, the two transfer rollers 9, 10 and the main cylinder 11. The free gap for passing through the batt has to be kept very tight, since with this carding particular lightweight batt is to be produced at high speed. The manufacturing and assembly tolerances of the rollers are crucial for the carding quality, especially because the trough gaps should be constant over a working width of for example 5 m. For this purpose, the trough 12 on the connection side to the drum on an adjustable segment 12b, with the contact angle and distance to the spool 11 is adjustable.

FIG. 2 shows a detailed view of the trough 12, which consists of a fixed segment 12a and at least one adjustable segment 12b. Both segments 12a, 12b can be flexibly connected to each other and have a parting line 12c. The fixed segment 12 a is arranged on a housing or frame, not shown, between the lower doffer roller 8, the upper transfer roller 9 and the lower transfer roller 10 by means of one or more fasteners 30. By means of various adjusting elements 31, the distance of the segment 12a to the rollers 8, 9 and 10 in the vertical and horizontal directions can be adjusted, so that a constant gap between each roller 8, 9, 10 and the segment 12a is formed, the gap sizes, for example between the transfer roller 9 and the segment 12a can be set smaller than between the doffer roller 8 and the segment 12a. An adjustable segment 12b is connected to a mounting 32, wherein the attachment 32 is also arranged on a machine housing or frame, not shown, in the region of the main cylinder 11. These attachment 32 can with adjustment 33 vertically and horizontally spaced from the spool 11th be set. The adjustable segment 12b forms the trough gap to the drum 11, as well as a partial gap to the transfer rollers 9 and 10th

With the adjustable trough 12 according to the invention, a gap of, for example, 1.5 mm to 5 mm, which is constant over the working width, can be set between the segment 12b and the tambour 11. The gaps between the segment 12a and the rollers 8, 9 or 10 can be adjusted differently to a size of 2 mm to 9 mm.

reference numeral

1

stuff

1a

inlet side

1b

outlet side

2

roller

3

roller

4

preturret

5

Wenderwalze

6

workers roll

7

doffer

8th

doffer

9

transfer roller

10

transfer roller

11

drummer

12

trough

12a

segment

12b

segment

12c

parting line

14

doffer

15, 15 '

edging roll

16

Transfer roll

17

conveyor belt

20

batt

30

attachment

31

adjustment

32

attachment

33

adjustment

Claims (14)

Carding machine with an inlet side (1a) for fiber flakes, which are fed to a pre-drum (4) and are disintegrated and aligned to the single fiber, a first layer of fibrous web being conveyed to a transfer roller (9) by means of an upper doffer roller (7) and then to a spool (9) 11), wherein a second layer of batt is transferred by means of a lower doffer roller (8) to a transfer roller (10) and then to the spool (11), wherein at least one layer of bobbin by means of at least one doffer roller (14) for further processing an outlet side (1b) of the carding be deducted, characterized in that the transfer rollers (9, 10) have the same diameter. Carding machine according to claim 1, characterized in that the transfer rollers (9, 10) have at least a diameter of 350 mm, preferably at least 380 mm, more preferably at least 400 mm. Carding machine according to claim 1 or 2, characterized in that the transfer rollers (9, 10) are designed to be operated at the same speed. Carding machine according to one of the preceding claims, characterized in that the lower doffer roller (8) has a diameter approximately 50 percent larger than the upper doffer roller (7), both doffer rollers (7, 8) being designed to operate at the same peripheral speed become. Carding machine according to claim 4, characterized in that the upper doffer roller (7) has a diameter of at least 450 mm. Carding machine according to one of the preceding claims, characterized in that the doffer rollers (7, 8) have a smaller peripheral speed than the transfer rollers (9, 10). Carding machine according to one of the preceding claims, characterized in that the pre-drum (4) has at least the same diameter as the spool (11). A carding machine according to claim 1, characterized in that a depression (12) with the lower doffer roller (8), the two transfer rollers (9, 10) and the spool (11) at least partially forms a gap for guiding the batt. A trough for use in a carding machine, wherein the trough (12) extends continuously over the working width of the carding and has three concave areas, which together with associated rollers (8, 9, 10) form a gap for guiding the batt, characterized in that the trough (12) has a fourth concave area which forms an adjustable gap with respect to a fourth roller (11). Trough according to claim 9, characterized in that the trough (12) has a first and a second segment (12a, 12b), wherein the second segment (12b) has a device for adjusting the gap to the fourth roller (11). Trough according to claim 9, characterized in that the first segment (12a), with which the gap is formed with three rollers (8, 9, 10), is adjustably fastened to a machine housing or frame of the carding machine. A trough according to claim 10, characterized in that the second segment (12b), with which the gap is formed to the fourth roller (11), adjustably mounted on a machine housing or frame of the carding. Trough according to claim 10 to 12, characterized in that the second segment (12b) at least partially forms a gap for guiding the batt with two further rollers (9, 10). A tray according to any one of claims 9 to 13 for use in a carding machine according to any one of claims 1 to 8.

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