Device for separating impurities on roller with card clothing

Abstract

The invention relates to a device for separating impurities on a clothing-attached roller of a flat carding machine, roller carding machine or cleaning machine, comprising at least one tool (21), which is arranged on a tool holder (20), the tool holder (20) being adjustable concentrically with respect to the clothing-attached roller (3a), and comprising a stationary suction hood (17), which is arranged on the tool holder (20), the inlet opening of the suction hood cooperates with a side opening (25c) of a stationary suction channel (25a). The invention is characterized in that the tool holder (20) is adjustably arranged within the suction channel (25a).

Description

Technical Field

[0001] The invention relates to a device for separating foreign matter on a clothed roller of a flat card, roller card or cleaning machine, which can be designed, for example, as a licker-in roller. The device has a chopping knife for foreign matter and a suction chamber associated with the chopping knife. The chopping knife is arranged on a support and can be adjusted to be spaced apart from the clothed roller. Regardless of how the knife is adjusted relative to the clothed roller, the movement of the knife is carried out parallel to or concentrically with the circumference of the roller in order to change the separation rate. Background Art

[0002] According to the prior art, it is known in the field of textile technology that in flat carding machines, roller carding machines or cotton cleaners for processing cotton, chemical fibers, etc., initial impurities in the fibers are removed by means of a chopper, which cooperates with a roller with a needle cloth with a very narrow gap. The chopper cooperates with a suction hood, through which the impurities are sucked out. In order to achieve a constant suction effect in the cleaning position, the chopper and the suction hood are related to each other at a defined distance. In order to isolate the air flow from other components of the flat carding machine, roller carding machine or cotton cleaner, some guide elements cooperate with the suction hood, which are either fixed in position or can be adjusted with the suction hood. When adjusting the distance between the chopper and the roller with the needle cloth, the cooperation of the chopper with the suction hood and the guide elements is complicated and requires high manufacturing precision of all components.

[0003] DE 10231829B4 discloses a device for separating impurities at a roller with a needle cloth. A support that can be adjusted on the circumference of the roller is arranged below the roller, and the support has a chopping knife. In the extension of the blade, the impurities are introduced into a suction hood loaded with negative pressure. The suction hood has a guide element, which cooperates with a guide element arranged in a fixed position opposite to the blade. When adjusting the separation rate of impurities, the support, the chopping knife and the suction hood are pivoted concentrically with the roller with the needle cloth. Here, the distance between the chopping knife and the roller with the needle cloth remains unchanged. Here, the guide element of the suction hood always rests on the fixed guide element, so that the gap between the fixed guide element and another roller upstream of the roller with the needle cloth remains constant. Adjusting the distance between the chopping knife and the roller with the needle cloth is independent of changes in the flow conditions for the suction hood. These flow conditions are constant in any adjustment position of the chopping knife.

[0004] EP 3530780B1 discloses a support having an adjustable chopping knife and a suction hood arranged in a fixed position. In order to ensure constant flow conditions due to the distance variation between the movable components, the chopping knife and the suction hood are connected with an elastic membrane, which ensures that the air flow for extracting impurities is constant.

[0005] In CN 104047076 B, the suction hood and the chopping knife are arranged on a common support. When adjusting the separation rate, the suction hood is also pivoted concentrically with the roller. In order not to affect the flow conditions, the suction hood has a guide element with a rollable elastic element fastened thereto, which replaces the fixed guide element in DE 10231829 B4.

[0006] The disadvantage of the above-mentioned prior art is the expensive construction which is highly dependent on clearance and therefore has to be arranged at an undesirably large distance between the chopping knife and the roller with the clothing. The mechanical connection of the suction hood to the chopping knife is also disadvantageous, since a constant air flow, i.e. a constant distance to the adjacent components, must always be maintained during the movement of the suction hood. This makes it necessary to increase the adjustment angle concentric to the roller with great effort. By increasing the adjustment angle, the separation rate of foreign matter can be adjusted within a wider range. Summary of the invention

[0007] Accordingly, the object of the present invention is to improve a device on a flat card, roller card or cleaning machine in such a way that the adjustability of the trash separation rate is improved at a constant air flow and the device can be produced cost-effectively.

[0008] The invention achieves the stated object by means of a device having the features specified in claim 1. Advantageous developments of the invention are defined in the dependent claims.

[0009] The device according to the invention is used for separating foreign matter from a clothed roller of a flat card, roller card or cleaning machine, and comprises at least one knife which is arranged on a knife support, wherein the knife support can be adjusted concentrically with the clothed roller. The device also comprises a fixedly arranged suction hood, the inlet opening of which cooperates with a side opening of a fixedly arranged suction channel.

[0010] The present invention includes the following technical teaching: the knife support is adjustably arranged inside the suction channel. The movement of the knife support is decoupled from the above-mentioned suction hood, so that the parts to be moved are reduced and can be adjusted more accurately with smaller gaps. Because according to the present invention, the suction hood is arranged in a fixed position, the air flow for separating impurities needs to be guided from the knife to the above-mentioned suction hood. For this purpose, a suction channel is arranged between the roller with needle clothing and the suction hood, and the adjustable knife support moves inside the suction channel. Therefore, the advantage of the present invention is that only the knife support is arranged to be adjustable, and all other elements of the device are arranged in a fixed position. The knife is adjustably arranged on the knife support, and the separation rate of impurities of the roller with needle clothing is changed by adjusting the knife support. The knife is adjustably arranged on the knife support, but it is no longer adjusted in continuous operation. The adjustment of the distance from the tip of the knife to the roller with needle clothing is carried out with the commissioning of the machine. However, after such an initial adjustment, the knife is no longer adjusted on the knife support.

[0011] Due to the fixed position arrangement of the suction hood, the weight of the suction hood is decoupled from the tool holder. As a result, the significantly smaller and lighter tool holder (including the tool fastened thereto) has a smaller inclination and does not require additional guidance on the suction hood. The accuracy of the guidance is improved and the adjustability and assembly are simplified. The tool can thus be adjusted closer to the roller with the needle clothing. Since the suction hood is decoupled from the tool holder, the pivot angle of the tool can be increased, because previously the connection between the suction hood and the central suction device of the carding machine also had to be pivoted together. Therefore, the adjustment range of the impurity separation rate is increased. Since according to the prior art, the surface of the tool has to cooperate with the opening of the suction hood, the tool can be designed to be smaller here, which reduces the weight of the movable parts and allows the more economical use of harder and more wear-resistant blades.

[0012] The tool holder can be arranged spaced apart from the side opening of the suction channel. This prevents the side opening of the suction channel from being impermissibly reduced or even closed when adjusting the tool holder, so as to block the air flow for guiding out impurities. Preferably, this distance can be achieved by a fixed profile, so that the minimum cross section for the air flow in the suction hood can be achieved at any position of the tool holder. However, other solutions are also conceivable, for example by other contours of the suction hood, the suction channel or the tool holder.

[0013] The knife support can have a sliding surface arranged concentrically with the roller with the needle clothing, which sliding surface cooperates with the sealing part of the profile. Here, the sliding surface of the knife support can slide along the fixed profile, wherein the sealing part is arranged on the fixed profile to avoid air flow losses to the suction hood.

[0014] The tool holder can be designed to at least partially change the cross section of the suction channel during radial adjustment. When the tool holder is in a position with more impurity separation, the cross section of the suction channel can be reduced, thereby increasing the air flow speed. When the tool holder is in a position with less impurity separation, the cross section of the suction channel can remain unchanged or have a maximum cross section, so that the air flow is also less deflected.

[0015] The suction channel is formed at least partially by the roller-side part, which results in an inexpensive structure which can be arranged on almost any embodiment of the roller with the clothing, independently of the arrangement and bearing design of the roller.

[0016] The suction channel can have a front opening, and air flow can be guided through the side opening to enter the inlet of the suction hood by this front opening. Here, the front opening can be aimed at the feed roller, receives and sucks the air flowing in the spinning preparation machine from the direction of the feed roller.

[0017] In order that air flow can flow through the side opening from the front opening in the suction channel, the suction channel of the relative front opening is limited. The cross section of the suction channel can be limited or constructed by an adjustable cutter support and a fixed profile. However, this can also be realized by other designs of the suction channel, the suction hood or the cutter support alternatively.

[0018] The suction channel can have an arcuate profile which is arranged radially to the roller with the card clothing, wherein the side opening is arranged opposite the roller with the card clothing. Due to the radial or parallel movement of the knife support relative to the surface with the card clothing, a slight reduction in the cross section from the front opening to the side opening of the suction channel can be achieved by the arcuate profile of the suction channel, whereby the air flow velocity entering the suction hood can be increased.

[0019] The knife support can have a first guide which extends along the working width of the clothed roller. The guide can be formed by a profile which is arranged below the clothed roller and which is inserted into a notch or recess of the knife support at any position of the knife support. Thus, guidance of the knife support over the entire working width is ensured. Local deformations or lifting of the knife due to coarse impurities from the clothed roller are thus prevented, regardless of the working width of the clothed roller, which can be up to 1.5 meters in flat cards and up to 5 meters in roller cards.

[0020] The knife support has an annular second guide which is arranged on the end side of the bearing housing of the clothed roller. This second guide allows for precise adjustment of the knife relative to the clothed roller, since the guide element of the knife support can be precisely integrated into the end plate of the bearing housing of the clothed roller without much effort. A constant distance of the knife from the clothed roller is thus ensured by radial rotation of the knife support about the clothed roller. The annular arrangement of the guide consisting of the guide element and the groove allows for precise adjustability of the knife relative to the clothed roller or a constant distance of the knife relative to the clothed roller by radial rotation. At the same time, however, the stops for the two end positions of the knife support are produced by the simplest means.

[0021] The knife support can have an integrated toothing which is designed to cooperate with a gear wheel, whereby the knife support can be adjusted and guided radially relative to the roller with the clothing using a small number of components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other measures to improve the present invention are described in more detail below with the aid of the accompanying drawings together with the description of the preferred embodiments of the present invention. Here, the flat carding machine described below is only a possible application example of the present invention, which can also be used on a roller carding machine or a cleaning machine.

[0023] In the figure:

[0024] Figure 1 A schematic side view of a flat carding machine equipped with a device according to the invention is shown;

[0025] Figure 2 A detailed side view of the device according to the invention is shown, which is arranged on a roller with card clothing of a flat card;

[0026] Figure 3 An enlarged side view of the device according to the invention is shown with the tool holder in the adjusted position;

[0027] Figure 4 An enlarged side perspective view of a bearing housing of a roller with card clothing is shown. DETAILED DESCRIPTION

[0028] Then refer to Figures 1 to 4 Preferred embodiments of the device according to the invention are explained. Identical features are provided with the same reference numerals in the figures. It should be understood that the figures are only shown in a simplified manner and in particular not to scale. Even though the following examples relate to licker-in rollers of flat carding machines, the device according to the invention can also be used on any rollers with card clothing in spinning preparation or on roller carding machines.

[0029] Figure 1The flat carding machine K is shown in a schematically simplified side view. The fiber bundle is guided through a channel to the feed roller 1 and the feed plate 2, and then to the cylinder 4 or the drum via a plurality of licker-in rollers 3a, 3b, 3c. On the cylinder 4, the fibers of the fiber bundle are parallelized and cleaned by means of a fixed and circumferential combing element (flat strip) 14, which is arranged on a revolving flat plate 13 that circulates around the flat plate turning rollers 13a, 13b. Subsequently, the produced fiber web is transported to the fiber web guiding element 9 by means of a doffer 5, a stripping roller 6 and a plurality of squeezing rollers 7, 8, which converts the fiber web into fiber strips by means of a compression bell mouth 10, and the fiber strips are transferred to the subsequent processing machine or the strip can 15 with the coiler 16 via the separating rollers 11, 12. The center (or bearing axis) of the cylinder 4 is marked with M. Arrow A indicates the processing direction in relation to the fiber material or the fiber web. The direction of rotation of these rollers is in Figure 1 4b shows the direction of rotation of the cylinder 4. The direction of rotation of the revolving flat 13 in the combing state is marked with C, and the return direction of the revolving flat is marked with D. The device according to the invention is preferably arranged and used below the licker-in rollers 3a to 3c on a flat carding machine.

[0030] Figure 2The device according to the invention is shown for separating foreign matter, for example, at the first clothed roller 3a (here a licker-in roller of a flat carding machine), wherein the feed roller 1 cooperates with the clothed roller 3a. All components mentioned here extend over the entire working width of the clothed roller, which in this embodiment is designed as a licker-in roller 3a. The device has a tool 21 for separating foreign matter and a suction chamber associated with the tool, which is designed as a fixed suction hood 17. Here, the tool 21 is arranged on a tool support 20 and can be adjusted to be spaced apart from the clothed roller 3a. This adjustment can be carried out during machine commissioning or maintenance. By pivoting the tool support 20 radially or concentrically with the clothed roller 3a, the amount of foreign matter and the separation rate are changed. Here, the distance between the tool tip and the clothed roller 3a remains constant. The tool 21 moves with the tool support 20 in a suction channel 25a, which is arranged between two roller-side parts 25. Only one roller-side part 25 is shown in this view. The suction channel 25a has an enlarged front opening 25b, which faces the feed roller 1. With the other side opening 25c, the suction channel 25a opens into the fixedly arranged suction hood 17. The fixed profile 26 is connected to the suction hood 17 on one side and corresponds to the adjustable or pivotable knife support 20. At the same time, the knife support 20 and the fixed profile 26 close or limit the suction channel 25a on the side opposite to the front opening 25b. The suction channel 25a thus has an enlarged front opening 25b oriented toward the feed roller 1 and a side opening 25c connected to the fixedly arranged suction hood 17. The cross section or volume of the suction channel 25a is increased or reduced by the knife support 20 moving in the suction channel 25a. The remaining minimum cross section for the air flow is determined by the cross-sectional dimensions of the profile 26. In this embodiment, the height of the profile 26 is equal to half the distance between the side opening 25c and the roller 3a with the card clothing. The pivotable knife support 20 closes or opens half of the cross section of the suction channel 25 b in the suction channel 25 b .

[0031] The circumference of the clothed roller 3a between the feed roller 1, which supplies the fibers, and the second clothed roller 3b, which is removed, is almost completely covered by a profile or guide surface 20d. A wedge-shaped profile 22 is arranged between the clothed rollers 3a, 3b, and a further fixed profile 23 is located adjacent to the circumference of the clothed roller 3a, counter to the direction of rotation of the roller. Adjacent to the fixed profile 23 is a guide surface 20d of the knife support 20, which continuously transitions into the tip of the knife 21. Below the guide surface 20d, a notch 20e or a recess is arranged in the knife support 20, into which a part of the profile 23 is inserted. In this case, the guide surface 20d is at least partially guided on the fixed profile 23 during the movement of the knife support 20. The knife support 20 has a sliding surface 20f concentrically or parallel to the outer circumference of the clothed roller 3a, which slides along the fixed profile 26. The sliding surface 20f and the guide surface 20d are arranged concentrically with the roller 3a with the needle cloth and form an arc-shaped hollow body, which is limited on one side by the receiving device 20a for the knife 21 and on the other side by the extension 20b with the integrated toothing 20c. The movement of the knife holder 20 with the knife 21 around the roller 3a with the needle cloth is realized by the rotation of the gear 24 that cooperates with the integrated toothing 20c. The gear 24 can be driven manually or by a motor.

[0032] according to Figure 2 , the knife support 20 moves toward the feed roller 1, wherein the amount of separated particles is changed by means of this rotational movement. In this case, the sliding surface 20f of the knife support 20 slides along the fixed profile 26, wherein a seal 27 is arranged on the fixed profile 26 in order to avoid air flow losses to the suction hood 17. The slot 20e of the knife support 20 is formed by the extension 20b and the guide surface 20d, inside which a part of the fixed profile 23 is still arranged and thus forms a guide for the knife support 20. Or in other words, the knife support 20 slides along the fixed profile 23 with the extension 20b and the guide surface 20d, which at least partially extends into the slot 20e.

[0033] Figure 3 The end position is shown when the knife support 20 is adjusted, which causes the entire knife support 20 to be radially pivoted relative to the roller 3a with the card clothing by turning the gear 24 in the toothing 20c. The sliding surface 20f in its end position abuts against the seal 27, whereby the cross section of the suction channel 25a is reduced at least in the area of ​​the side opening 25c (i.e. towards the suction hood 17) because the knife support 20 extends deeper into this area. In this position as well, the profile 23 is still inserted into the notch 20e and provides guidance for the knife support 20 on the back side.

[0034] Figure 4The device is shown in a perspective side view in the forward end position, wherein the knife 21 is moved with the knife support 20 close to the feed roller 1. The receiving device 20a for the knife 21 on the knife support 20 can be seen. By rotating the gear 24, the knife support 20 is pivoted inside the suction channel 25a, wherein the sliding surface 20f still rests on the seal 27 of the profile 26. The cross section of the suction channel 25a is reduced at least in the area of ​​the side opening 25c, through which the air flow conducts the part separated by the knife 21 into the suction hood 17. In addition to the radial guidance in the groove 20e of the knife support 20 by the profile 23, another guidance of the knife support 20 is carried out on the guide surface 19 arranged at the end on the bearing housing 18 of the roller 3a with the card clothing. In this embodiment, the bearing housing 18 is designed as a disk at the end, wherein a part of the outer circumference cooperates in an annular manner with the guide element 20g of the knife support 20. The guide element 20 g is guided in an annular manner on a disk at the end side of the bearing housing 18 .

[0035] Different from the prior art, a new guide in the form of an annular guide is used for the tool holder 20, wherein a guide surface 19 is arranged on the end-side bearing housing 18, which can be configured as a material attachment for milling. Guide elements 20g cooperate with these guide surfaces 19, which are arranged annularly on both sides of the tool holder 20 on the side or on the end side. In the cooperation between the guide surface 19 and the guide element 20g, at least one stop can be arranged at the same time, which is used to limit the radial pivoting degree of the tool holder 20.

[0036] Another difference from the applicant's prior art is the fixed position arrangement of the suction hood 17, whereby the weight of the suction hood 17 is decoupled from the knife support 20. Therefore, the significantly smaller and lighter knife support 20 (including the knife 21 fastened thereto) has a very small inclination and does not require additional guidance on the suction hood 17. The accuracy of the guidance is improved and the adjustability and assembly are simplified. As a result, the knife 21 can be adjusted closer to the roller 3a with the card clothing during machine commissioning and maintenance. Since the suction hood 17 is decoupled from the knife support 20, the pivot angle of the knife 21 can be increased, because the connection of the suction hood 17 to the central suction device of the carding machine must also be pivoted together. Because according to the prior art, the surface of the knife must cooperate with the opening of the suction hood, the knife can be designed to be smaller here, which reduces the weight of the movable parts and allows the use of harder and more wear-resistant blades more economically.

[0037] Unlike other prior art, no flexible or rollable separating element for the air flow is arranged between the fixed suction hood 17 and the tool support 20, which would wear accordingly and whose deformation or movement would have to be achieved additionally by adjusting the actuator. Due to the reduced weight, lever arm and double guidance, the required adjustment forces are reduced.

[0038] Instead, the knife support 20 moves inside the suction channel 25a, which is formed by the roller-side part 25. With radial adjustment of the knife support 20, the volume or cross section of the suction channel 25a changes, so that the suction channel 25a can be called adjustable. Figure 2 ), the separated particles quickly and purposefully reach the suction hood 25a. In the upper open position ( Figure 3 ), the separated particles are deflected in the suction hood 25a due to the contour of the tool holder 20 and are introduced into the suction hood 17.

[0039] Reference numerals list

[0040] K Carding Machine

[0041] 1 Feed roller

[0042] 2 Feed plate

[0043] 3a, 3b, 3c licker-in rollers, rollers with card clothing

[0044] 4 Cylinder

[0045] 4b (rotation direction of cylinder 4)

[0046] 5 dolf

[0047] 6 Stripping roller

[0048] 7, 8 squeeze roller

[0049] 9 Fiber web guiding element

[0050] 10 Compression bell

[0051] 11, 12 separation rollers

[0052] 13 revolving cover

[0053] 13a, 13b Flat plate turning roller

[0054] 14 Cover strips

[0055] 15 drums

[0056] 16. Strip Coiler

[0057] 17 Suction hood

[0058] 18 Bearing housing

[0059] 19 Guide surface

[0060] 20 tool holder

[0061] 20a Accommodation device

[0062] 20b Extension

[0063] 20c Tooth

[0064] 20d Guide surface

[0065] 20e notch

[0066] 20f Sliding surface

[0067] 20g guide element

[0068] 21 Knives

[0069] 22 wedge profiles

[0070] 23 Profiles

[0071] 24 Gears

[0072] 25 Roller side parts

[0073] 25a Suction channel

[0074] 25b Front opening

[0075] 25c Side opening

[0076] 26 Profiles

[0077] 27 Sealing part

[0078] A Processing direction

[0079] C (rotation direction of the revolving cover 13)

[0080] D (cover strip 14) return direction

[0081] M (cylinder 4) center or bearing axis

Claims

1. A device for separating foreign matter on a roller with a card cloth of a flat card, roller card or cleaning machine, comprising at least one knife (21) which is arranged on a knife support (20), wherein: The tool support (20) can be adjusted concentrically with the roller (3a) with the needle clothing. The device also includes a suction hood (17) arranged in a fixed position, and the inlet of the suction hood cooperates with the side opening (25c) of the suction channel (25a) arranged in a fixed position. It is characterized in that the tool support (20) can be adjusted inside the suction channel (25a).

2. The device according to claim 1, characterized in that The tool support (20) is arranged spaced apart from a side opening (25c) of the suction channel (25a).

3. The device according to claim 1, characterized in that The suction channel (25a) has a front opening (25b) through which the air flow is guided through the side openings (25c) into the inlet opening of the suction hood (17).

4. The device according to claim 3, characterized in that The suction channel (25a) is limited relative to the front opening (25b) by an adjustable knife support (20) and a fixed profile (26).

5. The device according to claim 1, characterized in that The tool holder is arranged at a distance from the side opening of the suction channel, wherein the distance is formed by the stationary profile so that at any position of the tool holder there is a minimum cross section for the air flow in the suction hood.

6. The device according to claim 5, characterized in that The knife support (20) has a sliding surface (20f) which is arranged concentrically with the roller (3a) with the needle clothing and cooperates with a sealing portion (27) of the profile (26).

7. The device according to claim 1, characterized in that The tool support (20) is designed to at least partially change the cross section of the suction channel (25a) during radial adjustment.

8. The device according to claim 1, characterized in that The suction channel (25a) is at least partially formed by the roller-side part (25).

9. The device according to any one of the preceding claims, characterized in that The suction channel (25a) has an arc-shaped contour which is arranged radially to the clothed roller (3a), wherein the side opening (25c) is arranged opposite to the clothed roller (3a).

10. The device according to claims 2 to 9, characterized in that The knife support (20) has a first guide, which is formed by a profile (23) arranged below the roller (3a) with the needle clothing and which is inserted into a notch (20e) or a recess of the knife support (20).

11. The device according to any one of the preceding claims, characterized in that The knife support (20) has an annular second guide portion which is arranged on the end side of the bearing housing (18) of the roller (3a) carrying the card clothing.

12. The device according to any one of the preceding claims, characterized in that The tool support (20) has a toothed portion (20c) configured to cooperate with a gear (24).

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