WO2019029914A1

WO2019029914A1 - Carding machine

Info

Publication number: WO2019029914A1
Application number: PCT/EP2018/068056
Authority: WO
Inventors: Armin Leder; Gerd Pferdmenges
Original assignee: TRüTZSCHLER GMBH & CO. KG
Priority date: 2017-08-09
Filing date: 2018-07-04
Publication date: 2019-02-14
Also published as: EP3665318A1; DE102017118111A1; CN110621818A; CN110621818B; EP3665318B1

Abstract

The invention relates to a carding machine comprising an inlet side for fiber flocks which are supplied by the rotation of a rotating drum (4) and which are dissolved, aligned, and cleaned between stationary carding elements and circulating cover rods (14) and the drum (4) until individual fibers are formed. The resulting fiber flock (19) is transferred from the drum (4) onto a doffer (5) which is arranged upstream of at least one take-off assembly for further processing or storing the fiber flock (19). The invention is characterized in that the take-off assembly is designed as at least one conveyor belt (20, 21) which removes the fiber flock (19) directly from the doffer (5), wherein the transfer of the fiber flock (19) from the doffer (5) onto the at least one conveyor belt (20, 21) is supported by suction.

Description

Titeltitle

Kardeteasel

The invention relates to a carding machine with an inlet side for fiber flakes, which are supplied by means of rolling a rotating drum and dissolved between Festkardierelementen and rotating flat bars and the drum to single fiber, aligned and cleaned, and the resulting batt from the drum to a customer is passed, which is arranged downstream of at least one deduction unit for further processing or storage of the batt.

A card according to this prior art is described in DE 10023011 A1.

In the case of cards, different take-off devices for the batt are known, in which the batt is first compressed by the tambour onto a pickup, and from this further to stripping and squeezing rollers by means of a transverse band take-off to form a sliver and then deposited in a can.

These all have the disadvantage that the batt undesirably warped and due to the multiple successively arranged transfer points the withdrawal speed is limited.

The object of the invention is the development of a carding machine on the outlet side for improved removal of the batt.

This object is achieved with the features of claim 1. Advantageous developments of the invention are specified in the dependent claims.

According to the technical teaching of claim 1, the carding machine comprises an inlet side for fiber flakes, which are fed by means of rolling a rotating drum, wherein the fiber flakes between Festkardierelementen and rotating flat bars and the drum are dissolved, aligned and cleaned to single fiber, and the resulting batt is passed from the drum to a customer, which is arranged downstream of at least one deduction unit for further processing or storage of the batt.

The invention is characterized in that the withdrawal unit is designed as at least one conveyor belt, which discharges the batt directly from the customer, wherein the transfer of the batt is supported by the customer on the at least one conveyor belt by a suction.

The invention is based on the recognition that, as a result of a decrease in the fiber web directly from the pickup, at least one less warp is drawn through at least one conveyor belt of the fiber web than in the prior art. By reducing the number of transfer points, the take-off speed can be increased up to 600 m / min. The absence of the wiping and squeezing rollers shortens the space of the card and makes them less susceptible to interference, since in the area of wiping and squeezing often the fiber material jams, resulting in production disruption. The support of the transfer of the batt from the customer to the conveyor by a suction train ensures an almost complete transfer of all fibers. The induced draft can be generated by applying a negative pressure, or by an air flow, the resulting force supports the detachment of the batt from the customer or holds the batt or the resulting sliver on the conveyor belt.

Advantageously, the at least one conveyor belt is arranged drivable transversely to the direction of rotation of the pickup. This can be deducted depending on the embodiment of the batt laterally or transversely to the direction of the card, or optionally in the direction of the card when using two conveyor belts, which are operated in opposite directions. This is in particular a shortening of the installation space of the card connected.

In a preferred embodiment, the at least one conveyor belt has a perforation. The induced draft thus acts directly on the batt, which is thus held flat on the conveyor belt. Since the batt in the transfer of the customer on the conveyor belt must be pulled out of the bent teeth of the customer or lifted out partially, the induced draft supports the transfer of the batt.

It is particularly advantageous that the at least one conveyor belt is designed as an endless circulating conveyor belt whose load space at the narrowest point at a distance from the customer of 0.5 to 5 mm, preferably 0.5 to 2 mm, over at least the entire working width of Extractor extends and compacts the batt into a sliver. It has been found that the adhesion of the conveyor belt to the batt acts well on this small distance between the conveyor belt and the customer, but on the other hand, the induced draft also has a particularly efficient effect.

Preferably, at least one suction device for generating the induced draft is arranged within the at least one conveyor belt. In this case, the at least one suction opening of the suction is aligned with the load strand. An active suction within the conveyor belt, which is directed to the Lasttrum, amplifies the air flow, with which the batt is transferred from the customer to the conveyor belt.

In this case, a negative pressure is preferably generated which is between 0.05 to 0.3 bar. The suction can thus be coupled to the air duct system of the card so that it can be dispensed with its own fan.

In a first embodiment, the conveyor belt extends over at least the entire working width of the pickup, so that the batt is removed laterally from the pickup. This results in a very short construction for the card, since all other elements for the acquisition of the sliver can be arranged laterally.

In a second embodiment, the batt is removed by two conveyor belts in the middle of the customer in the working direction. The previous machine configuration with an integrated drafting system and subsequent can storage can be maintained without sacrificing the advantage of the shortened overall length.

In a preferred embodiment, at least one cleaning roller is arranged in contact with the pickup in the area of the at least one conveyor belt and rotates counter to the pickup. This not only cleans the customer, but also creates an additional air flow in the direction of the conveyor belt, with which the batt is detached from the customer.

The cleaning roller is arranged in the direction of rotation of the consumer behind the conveyor belt, so that the batt is already in contact with the conveyor belt and the replacement facilitates the transfer by the generated air flow of the cleaning roller.

The use of a flow guide and a dynamic pressure box create or reinforce the induced draft, with which the batt is drawn from the set of the customer. In this case, form the flow guide and the dynamic pressure box a trigger gap through which the batt is promoted by the customer to the conveyor belt. The induced draft can be amplified at least for starting the card with a combination of generated overpressure and generated negative pressure on the dynamic pressure box or on the flow guide.

Advantageously, the flow guide and the dynamic pressure box are arranged between the customer and the conveyor belt. But they can also be arranged above and below a preferably curved conveyor belt and increase its surface up and down over the entire working width.

According to the invention, the immediate transfer of the batt from the customer to the conveyor completes the intervening arrangement of rollers, driven or not driven. Means for steering and amplifying the flow of air between the customer and the conveyor belt are within the scope of the invention.

Further, measures improving the invention will be described in more detail below together with the description of a preferred embodiment of the invention with reference to FIGS. Show it:

Fig. 1 is a side view of a card according to the prior art;

FIG. 2 shows a device according to the invention for discharging the fibrous web from the customer in a lateral sectional view; FIG.

Fig. 3 is a perspective view of the invention to the first embodiment;

Fig. 4 is a perspective view of the invention with a second embodiment;

Fig. 5 shows a third embodiment of the invention.

Fig. 1 shows a card according to the prior art with a feed roller 1, a dining table 2, with

lapses

3a, 3b, 3c, drum 4, pickup 5, stripping roller 6, nip rollers 7, 8, a transverse belt 9, trimming funnel 10, take-off rolls 11 (not shown) and 12, and a revolving lid 13 with slowly revolving flat bars 14. The directions of rotation of the rollers of the card are indicated by curved arrows. The direction of rotation of the drum is indicated by the arrow 4b. At the exit of the card is a can-stock 16 with jug 15 to the tape tray. A denotes the working direction (fiber material flow direction).

The squeezing rollers 7 and 8 are followed by the transverse belt withdrawal 9 in the working direction A. Fiber flakes are supplied to the carding machine via the feed roller 1 and the individual fibers between the drum 4 and the revolving flats 13 are separated and aligned. The resulting batt is withdrawn by the pickup 5 of the drum 4 and continued over the stripping and squeezing rollers 6, 7, 8. The drum 4, the pickup 5 and the following rollers 6, 7, 8 all have the width of the drum 4, which can be between 1 and 1.5 m. The emerging from the nip of the squeezing rollers 7, 8 fibrous web thus has a width of 1 to 1, 5 m. This thin but wide batt then hits the transverse belt withdrawal 9, which compresses the batt 19 into a sliver 17 and leads to the subsequent sliver funnel 10.

According to Figure 2 and 3, the device according to the invention for removing the batt 19 of the pickup 5 in a first embodiment, a single endless conveyor belt 20 having a perforation. The conveyor belt 20 extends in this embodiment, at least over the entire working width of the pickup 5. The conveyor belt 20 is stretched, guided and driven by two guide rollers 20.1, 20.2, wherein at least one guide roller 20.1 or 20.2 has a drive. A flat outer side of the conveyor belt 20, which is designed as a load strand is very close to a small distance of about 0.5 to 5 mm, preferably with a distance of 0.5 to 2mm, arranged on the clothing of the pickup 5 and is located It is approximately centered at the height of the central axis of the pickup 5. The empty section is the moving section of the conveyor belt 20, which is directed away from the pickup. Preferably, the conveyor belt 20 may also be arranged slightly below the central axis of the pickup 5.

The pickup 5 rotates counterclockwise with the batt 19 and conveys the batt 19 to the conveyor 20. The teeth of the clothing of the pickup 5 are inclined in the clockwise direction and can be freed from the fiber web 19 on the conveyor belt 20 during the transfer of the fiber web 19 from the pickup 5. Due to the direction of movement of the conveyor belt 20 transversely to the direction of rotation of the pickup 5, which is directed counterclockwise in this embodiment, the conveyor belt 20 can remove the batt 19 from the pickup 5. The batt 19 is compressed to a sliver 17 and fed via the conveyor belt 20 and, for example, two take-off

rollers

11, 12 for further processing. So that the fiber web 19 is held on the conveyor belt 20, the conveyor belt 20 is sucked from the inside by means of an exhaust 30 through air. The suction 30 may also extend in one piece along the working width of the pickup 5 or be formed in several parts. The suction opening 30a is oriented towards the pickup 5 and the load side of the conveyor belt 20, so that a permanent air flow 33 above and below the pickup 5 forms through the perforated conveyor belt 20 which holds the fiber web 19 on the conveyor belt 20. The air flow 33 is discharged below the suction 30 as exhaust air 34 by means of an exhaust duct 31, which is generated by the negative pressure of a fan, not shown, which may be connected to the suction of the card. The suction device 30 preferably has a suction opening 30a on only one side, so that air is not sucked through the empty strand of the conveyor belt 20. The generated negative pressure is in the range of 0.05 to 0.3 bar, which corresponds to an absolute pressure of 0.95 to 0.7 bar. The conveyor belt 20 and the suction 30 may be coordinated with each other so that the conveyor belt 20 rests on the suction in the region of the suction opening 30a and is guided in a sliding manner. This ensures a constant small distance of the load tube to the pickup 5, whereby the load strand does not flutter, but is just guided. Above the conveyor belt 20, a cleaning roller 32 may be arranged, which also rotates in the counterclockwise direction and thus rotates counter to the taker 5 at the point of contact. The cleaning roller 32 also extends over the entire working width of the pickup 5. Due to the direction of rotation of the cleaning roller 32, the detachment of the batt 19 is supported by the buyer 5 and at the same time amplifies the air flow 33 at the top of the conveyor belt 20. The cleaning roller 32 is in contact with the pickup 5 in engagement and always arranged on the side of the conveyor belt 20 on which the fiber web 19 has already been removed. According to the embodiment of Figure 3 so in the direction of rotation of the pickup 5 after the conveyor belt 20, since the fiber web 19 has already been removed by the conveyor belt 20 from the buyer 5.

As an alternative to the exemplary embodiment of FIGS. 2 and 3, it is also possible to work with a targeted overpressure, as a result of which an induced draft acts on the load side of the conveyor belt 20. Again, the air flow would be passed through the perforated conveyor belt 20 and discharged between the load and idle strand, for example by the suction 30. In particular, in this embodiment, the generated and directed by the cleaning roller 32 air flow is important to counter to the direction of rotation of the pickup 5 on to act the batt 19.

In the exemplary embodiment of FIG. 4, two

conveyor belts

20, 21 are arranged directly downstream of the pickup 5, which pull off the fiber web 19 approximately centrally to the pickup 5 as a sliver 17 through a withdrawal gap 18. The

conveyor belts

20, 21 with their guide rollers 20.1, 20.2, 21.1, 21.2 rotate in opposite directions, so that the fiber web 19 is drawn from the sides of the pickup 5 to the center and there compressed as sliver 17 in the take-off gap 18. Each

conveyor belt

20, 21 is associated with a separate suction 30, which sucks through the

perforated conveyor belt

20, 21. Subsequently, take-off

rollers

11, 12 or another take-off device, not shown here, may be arranged like a funnel with which the sliver 17 is compressed and conveyed to a can tray, not shown.

A further improvement to the transfer of the batt 19 on the conveyor belt 20 can be achieved by at least a smaller upper part of the conveyor belt 20 is concave and at least partially adapts to the curvature of the pickup 5. The batt 19 would then enter a narrowing gap between the pickup 5 and the conveyor belt 20 and then be transferred laterally by an approximately constant gap from the pickup 5 to the conveyor belt 20. On the one hand, this arrangement can optimize the pressure course of the air flow, on the other hand it reduces the energy consumption of the suction, since less false air is sucked in.

In a further exemplary embodiment according to FIG. 5, a flow-guiding element 36 in combination with a dynamic pressure box 37 ensures a narrowing gap to the consumer 5, in which the entrained air flow 33 accumulates. The flow guide 36 and the dynamic pressure box 37 extend over the entire working width of the pickup 5 and form a trigger gap 38 through which the batt 19 tapers onto the conveyor belt 20. The dynamic pressure box 37 provides a damming of the air flow, which is entrained by the rotating pickup 5 and the transported batt. The dynamic pressure box 37 may have on the side facing the pickup 5, openings through which compressed air is pressed. For an air flow is generated, which ensures a detachment of the batt 19 from the clothing. The generation of compressed air can be used for starting the card when the first batt 19 is on the pickup. The air flow is directed into the discharge gap 38 and the compressed air in the dynamic pressure box 37 can be switched off when the fiber web 19 passes through the take-off gap 38 and is transported by the conveyor belt 20. The inclination of the withdrawal gap 38 substantially corresponds to the inclination of the clothing used on the pickup 5 in order to release the fiber web 19 from the clothing via the air flow. In this case, the trigger gap 38 is rounded coming from above in a horizontal orientation.

The lower flow guide element 36 forms with the pickup 5 a narrowing gap in which the entrained air flow is accumulated on the dynamic pressure box 37 and is discharged through the withdrawal gap 38. It arises in the region of the take-off gap 38, a suction, which dissolves the batt 19 from the clothing of the pickup 5 and supplies to the conveyor belt 20. The flow-guiding element 36 can be permanently or only temporarily exposed to a negative pressure to reinforce the induced draft, in particular when starting the card. The generated negative pressure is in the range of 0.05 to 0.3 bar, which corresponds to an absolute pressure of 0.95 to 0.7 bar, and can be taken from the carding machine's compressed air or suction system. In this case, the side of the flow guide element 36 facing the surface of the consumer is likewise provided with openings or perforations through which the air flow is removed.

In this embodiment, the flow guide 36 and the dynamic pressure box 37 are shown for illustrative purposes as solid components. However, these may be formed in thickness as very thin hollow profiles which only a few millimeters between the pickup 5 and the conveyor belt 20 in place.

The conveyor belt 20 may be formed integrally or in two parts according to the embodiment of Figures 3 and 4. It may be drained, but it does not need to be drained. What is important is a guided air flow with which the fibrous web 19 is held on the conveyor belt 20. For this purpose, the conveyor belt 20 may have a perforation and within the conveyor belt 20, a suction opening 30a for exhaust air and support the conveyor belt 20 have.

The advantage of the invention is that it can be dispensed with several mechanical and interference-prone components such as stripping and squeezing rollers and thus the card can be made shorter. An essential aspect, however, is that with the invention, the sliver is once warped less than in the prior art. Thus, the card sliver can be produced with a higher quality. Another advantage is the higher take-off speed, which can be 21 to 600 m / min with the conveyor belt 20.

Bezugszeichenreference numeral

One feed roller

2 Dining Table

3a, 3b, 3c early rice

4 drum

4b direction of rotation drum

5 customers

6 skimmer

7 Nippers

8 Nippers

9 cross belt deduction

10 sliver trumpet

11 take-off roll

12 take-off roll

13 revolving flat

14 flat bar

15 pot

16 can coiler

17 sliver

18 deduction gap

19 batt

20 conveyor

20.1, 20.2 pulley

21 conveyor

21.1, 21.2 pulley

30 extraction

30a suction

31 air exhaust

32 Clearer roller

33 air flow

34 exhaust

35 off rolls

36 flow guide

37 dynamic pressure box

38 deduction gap

A working direction

Claims

Card with an inlet side for fiber flakes, which are supplied by means of rolling a rotating drum (4), and between Festkardierelementen and rotating flat bars (14) and the drum (4) to the single fiber dissolved, aligned and cleaned, and the resulting batt ( 19) is transferred from the drum (4) to a pickup (5), which is followed by at least one withdrawal unit for further processing or storage of the batt (19), characterized in that the withdrawal unit as at least one conveyor belt (20, 21) is, which discharges the batt (19) directly from the pickup (5), wherein the transfer of the batt (19) from the pickup (5) on the at least one conveyor belt (20, 21) is supported by a suction.
Carding machine according to claim 1, characterized in that the at least one conveyor belt (20, 21) is arranged drivable transversely to the direction of rotation of the pickup (5).
Carding machine according to claim 1 or 2, characterized in that the at least one conveyor belt (20, 21) has a perforation.
Carding machine according to one of claims 1 to 3, characterized in that the at least one conveyor belt (20, 21) as an endless circulating conveyor belt (20) is formed, the load strand at a distance of 0.5 to 5 mm, preferably 0.5 to 2 mm, over at least the entire working width of the pickup (5) and the batt (19) compressed to a sliver (17).
Carding machine according to one of the preceding claims, characterized in that within the at least one conveyor belt (20, 21) at least one suction (30) is arranged, whose at least one suction opening (30a) is aligned with the Lasttrum.
Carding machine according to claim 5, characterized in that by means of the at least one suction (30), a negative pressure is generated.
Carding machine according to claim 6, characterized in that the negative pressure generated is between 0.05 to 0.3 bar.
Carding machine according to one of the preceding claims, characterized in that the conveyor belt (20) extends over at least the entire working width of the pickup (5) and discharges the fiber web (19) laterally from the pickup (5).
Carding machine according to one of the preceding claims 1 to 7, characterized in that two conveyor belts (20, 21) remove the batt (19) in the center from the pickup (5).
Carding machine according to one of the preceding claims, characterized in that at least part of the conveyor belt (20) is adapted to the curvature of the pickup (5).
Carding machine according to one of the preceding claims, characterized in that the further at least one conveyor belt (20, 21) further take-off devices such as take-off rolls (11, 12) or a funnel are arranged downstream.
Carding machine according to one of the preceding claims, characterized in that at least one cleaning roller (32) is arranged in contact with the pickup (5) in the area of the at least one conveyor belt (20, 21), which rotates counter to the pickup (5).
Carding machine according to claim 12, characterized in that the at least one cleaning roller (32) in the direction of rotation of the pickup (5) behind the conveyor belt (20, 21) is arranged.
Carding machine according to one of claims 12 to 13, characterized in that extending the at least one cleaning roller (32) over the entire working width of the pickup (5).
Carding machine according to claim 1, characterized in that the induced draft is generated or reinforced by a flow guide element (36) and a dynamic pressure box (37), the flow guide element (36) and the dynamic pressure box (37) forming a trigger gap (38) through which the fiber web (19) from the pickup (5) to the conveyor belt (20) is conveyed.