WO2020216518A1

WO2020216518A1 - Carding machine having a device for setting the carding gap

Info

Publication number: WO2020216518A1
Application number: PCT/EP2020/056307
Authority: WO
Inventors: Christoph Leinders; Robert Pischel
Original assignee: TRüTZSCHLER GMBH & CO. KG
Priority date: 2019-04-25
Filing date: 2020-03-10
Publication date: 2020-10-29
Also published as: EP3959364A1; DE102019110699A1; EP3959364B1; CN113474498A; CN113474498B

Abstract

The invention relates to a carding machine (100) having a drum (4) mounted in a rotatable manner between two side plates (28), wherein in each case at least one flexible bend (29) is arranged in a settable manner directly or indirectly on in each case one side plate (28) by means of a plurality of setting points, and, at or on each flexible bend (29), at least one sliding strip (18) for guiding a multiplicity of revolving flat bars (14) of a revolving flat card system (17), wherein each sliding strip (18) consists of two sliding strips (18a, 18b) oriented in a wedge shape with respect to one another, wherein an upper sliding strip (18a) is arranged in a displaceable manner on a lower sliding strip (18b), wherein the flexible bend (29) is arranged in a settable manner at at least eight adjusting points (19a - 19f, 24) directly or indirectly on the side plate (28) concentrically with the drum (4).

Description

Title: Card with a device for adjusting the carding gap

description

The present invention relates to a card with a drum rotatably mounted between two side plates, at least one flexible bend being arranged directly or indirectly adjustable on each side plate by means of several adjustment points, and on or on each flexible bend at least one slide bar for guiding a large number of rotating flat bars a revolving cover system is arranged, each slide strip consists of two wedge-shaped slide strips aligned with one another, wherein an upper slide strip is arranged displaceably on a lower slide strip. According to current practice, the first calibration of the carding gap is carried out on a cold, stationary card or card by Fland. For this purpose, a feeler gauge is pushed by hand between the clothing tips of the flat and the drum on individual flat bars in order to determine the existing carding gap. This process takes place for the fixed cover, which are then set to a predetermined distance, as well as for the revolving cover. The flexible bend and then the sliding strips are set using the feeler gauges. With the flexible bend, the setting can be made precisely in the area of the adjustment points. The flexible bend deforms between the adjustment points, so that here there is a deviation from the geometrically ideal contour or radius in the range of a few hundredths of a millimeter, which is undesirable for an exact adjustment of the carding gap. The determined carding gap then hangs on a variety of factors including, but not limited to, the experience of the hiring person.

The clothing wear causes an enlargement of the carding gap, which cannot be absorbed by the travel of the slide strips alone. If the carding gap becomes too large, the flexible curve has to be readjusted, so that if the flexible curve is further adjusted at the adjustment points, the area between the adjustment points will continue to sag. The carding gap, which has the correct spacing in the area of the set points, but increases between the set points, changes continuously over the flat travel of the flat rods. The travel of the sliding strips existing according to the current state of the art is too small to, on the one hand, use an automatic calibration to approach the sets of the flat bars on contact with the set of the drum. On the other hand, however, it is also too small to keep the carding gap constant in the event of a temperature change during operation and at the same time to compensate for clothing wear.

The object of the invention is to develop the existing card, to enlarge the adjustment range of the carding gap and at the same time to create an exact, automatic adjustment of the carding gap with high accuracy.

This object is achieved on the basis of a card according to the preamble of claim 1 in conjunction with the characterizing features. Advantageous further developments of the invention are given in the dependent claims.

The invention comprises a card with a drum rotatably mounted between two side plates, with at least one flexible bend being arranged directly or indirectly adjustable on each side plate by means of several adjustment points, and on or on each Flexible bend at least one slide bar for guiding a plurality of revolving flat bars of a revolving cover system is arranged, each slide bar consisting of two wedge-shaped slide bars aligned against one another, with an upper slide bar being slidably arranged on a lower slide bar.

The invention provides that the flexible bend is arranged concentrically to the drum and can be adjusted concentrically to the drum at at least eight adjustment points, directly or indirectly on the side plate. The increase in the adjustable fastening of the flexible arch on the side plate with at least eight adjustment points enables an almost exactly geometrically adjustable radius of the flexible arch without significant material deformation occurring between the adjustment points or the adjusting spindles. Extensive tests have shown that with at least eight adjustment points, the deformation of the flexible bend between the adjustment points is reduced so that the carding gap does not change significantly. The change or enlargement of the carding gap between the adjustment points is less than 0.025 mm or 1/1000 “, which has no influence on the carding result. This number of adjustment points has proven to be optimal, particularly with the angle of the flexible bend of around 90 °. If the card is provided with a larger flat circuit, which is to be equipped with 110 flat bars instead of 84 flat bars, for example, an increase in the setting points to 10 can be useful.

Preferably, the distance between the adjusting points decreases from the center of the flexible arch towards the outside. The decreasing distance between the adjustment points starting from the center of the flexible bend has proven to be very advantageous since a greater bending load acts on the end points of the flexible bend. The two outer adjusting points of the flexible bend are preferably arranged on flanges which are adjustably attached to the side plate. The flanges are used, among other things, to accommodate the storage of the belt for the revolving cover system, suction elements or at least a cleaning brush for the flat bars. The combination of the fastening of the two outer adjustment points with the storage of the belt for the cover circuit enables the carding gap to be easily adjusted, since the two outer adjustment points are used for alignment with the drum, and the adjustment spindles in between determine the size of the radius of the sliding strips Flexible arch is more or less bent.

Because at least six adjusting spindles are arranged between the two adjusting points from the center of the flexible arch at decreasing intervals, the deformation area of the flexible arch between the adjusting spindles is kept so small that the flat bars sag after the slide bar has been passed over in the area of the adjusting spindle Carding gap no longer has an effect. The sliding strips preferably have a gradient of at least 0.05%, preferably at least 0.1%, on the surfaces in contact. By increasing the incline with which the wedge shape of the sliding strips is increased, the adjustment range for the carding gap increases. This makes it possible, on the one hand, to move the clothing of the flat bars into contact with the clothing of the drum and, on the other hand, to keep the carding gap constant at a temperature of the card of for example 60 ° Celsius. The adjustment range in the radius is preferably at least 20/1000 ", but particularly preferably at least 40/1000", by which the distance between the sets of flat bars and the drum can be varied. In a preferred embodiment, a sensor is arranged on or in the flexible bend or the sliding strips, which sensor is designed to determine the displacement path of the sliding strips relative to one another. The integration of the sensor on or in the flexible bend or on or in the slide strips contributes to increasing the setting accuracy of the carding gap. At the same time, the drive can be made cheaper and more robust.

The sensor can preferably interact with a surface which is arranged on a toothed rack on or within the flexible bend or the slide bar. The result is a very space-saving solution that can be encapsulated from the environment in a dust-proof manner within the sliding strip with little effort. In view of the desired accuracy of the setting and the small dimensions, a motor-gear combination is preferably used as the drive, which has an integrated brake. The integrated brake enables the components to be adjusted very precisely to the drum, which is 1/1000 “. The invention has the advantage that the flexible bend does not have to be adjusted during the service life of the clothing due to the increased travel of the sliding strips. The flexible bend is only readjusted when the drum is first delivered or when the drum is garnished again, so that the calibration of the carding gap and the adjustment of the carding gap during operation can only be carried out using the sliding strips. The arrangement and guidance of the flexible arch at at least eight adjustment points also provides the necessary accuracy for guiding the revolving cover system. The deviation in the distances between the sets of flat bars and the drum along the flat travel is so small that it is not necessary to adjust the flexible bend during operation can. Only this accuracy opens up the possibility that calibration of the carding gap and its setting during operation in an acceptable tolerance range is possible exclusively by moving the slide strips over an enlarged adjustment range. This makes the control less complex, since the flexible arch can be stored as a fixed reference after setting or re-hingeing and the carding gap can only be adapted to the operating conditions via the travel of the sliding strips. It simplifies the entire setting of the carding gap, since only the travel of the slide strips has to be adjusted via the card's control.

Further measures improving the invention are shown in more detail below together with the description of a preferred exemplary embodiment of the invention with reference to the figures. Even if the exemplary embodiment relates to a card, the components described here can also be parts of a card.

Show it:

Figure 1 is a schematic side view of a card with the device according to the invention; FIG. 2 shows a perspective illustration of the flexible arch with the sliding strip;

Figure 3 is a schematic view of the attachment of the

Flexible bend; Figure 4 is a schematic view of the adjustability of the

Sliding strips on the flexible bend;

Figure 5 is an enlarged view of the slide strips and the

Flexible arch.

Fig. 1 shows a card 100 according to the prior art, in which fiber flocks are passed via a shaft to a feed roller 1, a feed table 2, via several lickerins 3a, 3b, 3c, to the drum 4 or the tambour. On the drum 4, the fibers of the fiber flocks are parallelized and cleaned by means of fixed carding elements 20, suction hoods and separating knives and by means of rotating carding elements arranged on a revolving flat system 17, which are designed as flat rods 14. The resulting fiber pile is then conveyed via a doffer 5, a doffing roller 6 and several squeezing rollers 7, 8 to a nonwoven guiding element 9, which transforms the fiber web with a funnel 10 into a sliver that is transferred via take-off rollers 11, 12 to a subsequent processing machine or can 15 becomes. The adjustment of the flat bars 14 and the fixed carding elements 20 to the drum 4 (carding gap) takes place via slide strips (18), not shown here, which have elements which are aligned in a wedge shape with respect to one another. The setting of the pickup 5 at a distance from the drum 4 takes place by means of an adjusting system in which the pickup 5 is pivoted about a rotatably arranged bearing.

The following description relates to the setting of the distance between the clothing of the drum 4 and the clothing on the flat bars 14 of the revolving flat system 17.

Figure 2 shows the principle of the slide strip 18, which consists of an upper displaceable wedge-shaped slide strip 18a and a lower stationary wedge-shaped slide strip 18b. In this exemplary embodiment, the slide strip 18 for the revolving cover system 17 is shown. The slide bar 18 is usually mounted directly or indirectly, for example on a flexible bend 29 and adjustably connected to the side plate of the card 100, so that each card 100 has a flexible bend 29 and at least one slide bar 18 on both sides of the drum 4. The upper slide bar 18a is slidably arranged on the lower slide bar 18b, a gear wheel 13, which penetrates the lower slide bar 18b, displacing the upper slide bar 18a on the circumference. The lower sliding strip can be arranged in a groove in the flexible arch 29 that is open at the top and is not visible in the illustration in FIG. The radius of the sliding strip 18 is arranged concentrically to the radius of the drum 4, since the flat bars 14 are guided on their flat travel against the direction of rotation of the drum 4 and should always have the same distance from the drum 4 (Carding gap). The revolving covers 14 slide on the upper side of the upper slide strip 18a with their slide elements or pins arranged laterally in the front area, which are guided and moved at a distance from one another via a belt drive (not shown). The sliding elements or pins interact with one or more contact arcs 23 of a contact element 22, which can be arranged, for example, laterally on the sliding strip 18 or on the flexible bow 29. This embodiment shows the arrangement of, for example, four contact elements 22 on the sliding strip 18 or on the flexible bend 29, so that the location of contact between the clothing 14 of a flat rod 14 and the clothing 20a of the drum 20 can be localized very precisely. The contact elements 22 with their contact arcs 23 are in turn electrically connected to the control of the card 100. In order to adapt the radius of the sliding strip 18 concentrically to the radius of the drum 4 and / or to adjust the basic distance between the surface of the sliding strip 18 and the drum 4, the flexible bend 29 has a plurality of adjusting spindles 19a-19f, which can be adjusted manually or by motor . In this embodiment, the flexible bend 29 is adjustable in eight positions. On the left and right, the flexible bend 29 is attached to the side plate 28 or to a flange 25 adjustably arranged thereon, each with a setting point 24. Six adjusting spindles 19a-19f are provided between the adjusting points 24, with which the flexible bend 29 can be adjusted on each side of the card 100. The distance between the adjustment points decreases from the center of the flexible bend 29 to its ends. For example, the adjusting spindles 19c and 19d are arranged at a distance on an arc of 18 °, whereas the distance between the adjusting spindles 19a and 19f to the adjusting points 24 on an arc is only 10 °. The adjustment of the upper slide strip 18a on the lower slide strip 18b takes place, as already mentioned, with a gear wheel 13 which is driven by means of an electric motor drive 21. The drive 21 can be designed as a motor-gear combination, for example as a stepper motor with an externally arranged sensor system. By adjusting or shifting the upper slide bar 18a on the lower slide bar 18b, the wedge shape also translates the movement, in which a large path is covered on the circumference of the lower slide bar 18b, which causes only a slight change in the radius. Since the distance between the sets of flat bars 14 and the set 4a of the drum 4 is to be set with an accuracy of 1/1000 inch, any play in the mechanical coupling of the components must be minimized. For this purpose, the drive 21 is equipped with a brake that can be integrated in the drive 21. The brake avoids a slight reverse movement when the drive 21 is moved, so that the reference point can be determined with the greatest accuracy when there is contact between the sets.

FIG. 3 shows the flexible bend 29 on one side of the card 100, which is adjustable with its two adjusting points 24 on both sides on a flange 25 each. The flanges 25 serve at the same time to support the revolving flat system 17, not shown here, as well as for the attachment of further attachments such as suction or a brush system for cleaning the flat rods 14. The flanges 25 are attached to a side plate 28 of the card 100, the drum 4 of which is in on both sides the side plates 28 is rotatably mounted. Between

Adjusting points 24, six adjusting spindles 19a-19f are arranged from the center outwards at increasingly smaller distances so that the flexible bend 29 can be adjusted at a total of eight points in this exemplary embodiment. An almost exactly geometrically adjustable radius of the flexible arch 29 is thus possible without a significant one Material deformation occurs between the adjusting points 24 or the adjusting spindles 19a-19f.

According to FIG. 4, the upper wedge-shaped slide bar 18a can be seen, which is arranged displaceably on the lower wedge-shaped slide bar 18b, a gear wheel 13 that penetrates the lower slide bar 18b shifts the upper slide bar 18a on the circumference. For this purpose, a toothed rack 13a is arranged inside or on the lower slide strip 18b, which cooperates with the toothed wheel 13. The lower slide strip 18b can be arranged in a groove of the flexible bend 29 that is open at the top or can be formed in one piece with the flexible bend 29 and is only partially visible in this illustration. The radius of the sliding strip 18 is arranged concentrically to the radius of the drum 4 and can be increased or decreased by moving the sliding strips 18a, 18b relative to one another. In order to adapt the radius of the sliding strip 18 concentrically to the radius of the drum 4 and / or to adjust the basic distance between the surface of the sliding strip 18 and the drum 4, the flexible bend 29 has a large number of adjusting spindles 19a-19f which can be adjusted manually or by motor . In this embodiment, the flexible bend is adjustable in eight positions. On the left and right, the flexible bend is attached to the side plate 28 or to a flange adjustably arranged thereon, each with a setting point 24. Six adjusting spindles 19a-19f are provided between the adjusting points 24, with which the flexible bend 29 can be adjusted on each side of the card 100. The adjustment of the upper slide bar 18a on the lower slide bar 18b takes place, as already mentioned, with the gear wheel 13 which is driven by means of drive 21. A sensor 26, which interacts with a surface 27 of the rack 13a, is arranged on the flexible bend 29. The sensor 26 determines the distance to the surface 27, which changes with the displacement of the upper slide bar 18a on the lower slide bar 18b. The integration of the sensor 26 on the flexible bend 29 or on or in the Slide strips 18a, 18b enable the carding gap to be set more directly and more precisely than according to the prior art, in which the sensor was integrated in the drive 21. Another not insignificant advantage is that the drive 21 can be made cheaper and more robust for operation in the spinning mill.

FIG. 5 shows the arrangement of the sensor 26 on the flexible bend 29 which, for example, interacts with a surface 27 of the rack 13a. In this exemplary embodiment, the surface 27 rests on the sensor 26, which at the same time realizes the largest possible radius in the adjustment of the sliding strips 18a, 18b relative to one another.

The arrangement of at least eight adjustable adjustment points of the flexible arch 29 results in a greater approximation of the geometrically ideal outer contour, so that the carding gap deviates with a maximum accuracy of 1/1000 "over the arch of the flat travel. In other words, the deformation of the flexible arch 29 between the adjustment points is a maximum of 1/1000 ”. Another advantage of the invention is the high adjustment range due to the modified slide strips 18a, 18b, which now have a gradient of at least 0.05%, preferably at least 0.1%. This results in an adjustment range of at least 20/1000 ", preferably of at least 40/1000", with which the radius of the slide strips 18a, 18b relative to the drum 4 can be changed. This means that the carding gap can be kept constant over the service life of the clothing without having to readjust the flexible bend 29. At the same time, the set of flat bars 14 can be approached to make contact with the set of drum 4. The adjustment range, which is increased by the modified sliding strips 18a, 18b, enables automatic calibration and adjustment of the carding gap over the service life of the clothing without the flexible bend 29 having to be readjusted when the clothing is worn. The integration of the sensor 26 on the flexible bend 29 or on or in the slide strips increases the Setting accuracy of the carding gap. At the same time, the drive 21 can be made cheaper and more robust. Because the drive 21 has an integrated brake, the setting accuracy of the carding gap is also increased in small steps. The embodiment of the invention is not limited to the preferred exemplary embodiment specified above. Rather, a number of variants are conceivable which make use of the solution shown even in the case of fundamentally different designs. All of the features and / or advantages arising from the claims, the description or the drawings, including structural details or spatial arrangements, can be essential to the invention both individually and in a wide variety of combinations.

Reference number

100 card 1 feed roller

2 dining table

3a, 3b, 3c lickerin

4 drum

4a set

4b warehouse

5 customers

5a set

5b warehouse

6 Doffer roller 7 Squeegee roller

8 squeeze roller

9 Fleece guide element

10 funnels

1 1 take-off rollers

1 2 take-off rollers

13 gear

13a rack

14 flat rod

15 jug

17 Revolving lid system

18 sliding strips

18a upper slide bar 18b lower slide bar

19a - 19f adjusting spindle

20 fixed carding element

21 drive

22 contact element

23 Contact sheet

24 set point

25 flange

26 sensor

27 area

28 side plate

29 flexible bend

Claims

1. Card (100) with a drum (4) rotatably mounted between two side plates (28), at least one flexible bend (29) being arranged directly or indirectly adjustable on each side plate (28) by means of several setting points, and on or on Each flexible bend (29) has at least one sliding strip (18) for guiding a plurality of circumferential flat bars (14) of a revolving flat system (17), each sliding strip (18) consisting of two sliding strips (18a, 18b) aligned in a wedge-shaped manner, with one upper slide bar (18a) is arranged displaceably on a lower slide bar (18b), characterized in that the flexible bend (29) at at least eight adjustment points (19a - 19f, 24) directly or indirectly on the side plate (28) concentric to the drum (4) is arranged adjustable.

2. Card according to claim 1, characterized in that the distance between the adjusting points (19a-19f, 24) from one another decreases from the center of the flexible bend (29) to its ends.

3. Card according to claim 1, characterized in that the

Flexible bend (29) is arranged at two outer adjusting points (24) on flanges (25) which are adjustably attached to the side plate (28). 4. Card according to claim 1, characterized in that the

Slide strips (18a, 18b) have a slope of at least 0.05%, preferably of at least 0.1%, on the surfaces in contact. 5. Card according to one of the preceding claims, characterized in that on or in the flexible bend (29) or the Slide strips (18a, 18b) a sensor (26) is arranged, which is designed to determine the adjustment path of the slide strips (18a, 18b) to each other. 6. Card according to claim 5, characterized in that the sensor

(26) interacts with a surface (27) which is arranged on a toothed rack (13a) on or within the flexible arch (29) or the slide bar (18). 7. Card according to one of the preceding claims, characterized in that the sliding strips (18a, 18b) are shifted by means of a drive (21) which cooperates with a brake.