EP3441509A1 - Feed table for a fiber tape release device of an open-end spinning device - Google Patents

Abstract

The invention relates to a feed table device (2) for a sliver disintegrating device (1) of an open-end spinning device and the sliver disassembling device and the open-end spinning device, comprising a dining table holder (3) and a dining table (4) replaceably fixable to the dining table holder (3), wherein the Food table (4) has a clamping region (5) for a sliver feed cylinder (7) for conveying a master fiber ribbon, wherein the feed table (4) and the Speisetischhalter (3) each having mutually contacting connecting portions (8, 9). According to the invention, the connecting areas (8, 9) are designed and arranged such that a clamping force between a sliver feed cylinder (7) and the clamping area of the feed table (4) presses the dining table (4) against the dining table holder (3), and the connecting areas engage in such a way in that in all directions of a plane perpendicular to the direction of the clamping force between a fiber sliver draw-in cylinder (7) and the clamping region of the feed table (4) there is positive locking between the connecting regions (8, 9).

Description

The present invention relates to a dining table device for a sliver disintegrating device of an open-end spinning device comprising a dining table holder and a replaceable to the dining table holder fixable dining table. The invention also relates to a sliver disintegrating device and an open-end spinning device.

Sliver opening devices for open-end spinning devices have long been known and explained in detail in numerous patent applications. Such sliver disassembling devices are also known to often have a dirt separation device in the form of a so-called dirt outlet opening in the region of their opening roller housing.

Such a dirt discharge opening is an important element of fiber sliver disassembling devices, particularly in connection with the proper processing of fibrous webs. Although the technology of such sludge separators appears relatively simple and well known, for example, by the cleaning systems of spinning preparation machines, it is but such devices are very delicate, sensitive to change devices. That is, even minor modifications to the soil separation devices of sliver disintegrators can significantly affect the outcome of open-end spinners not only in terms of the amount of soil excreted, but also the overall spinning result.

In the known sliver disassembling devices, the sliver fed between a sliver feed cylinder and the sliver clamping section of a feeder table device is disassembled by the slitter roller into individual fibers. In this process, as far as possible dirt particles and fibers are separated. The opening roller transports both components via a fiber guide surface of a so-called fiber beard support in the region of a dirt outlet opening. In this transport, both the fibers and the dirt particles are accelerated by the opening roller or by a circulating with the opening roller air flow in no time at approximately peripheral speed of the opening roller. As a result of the centrifugal force acting on them, the mass particles, ie fibers and dirt particles, tend to leave the circular path predetermined by the fiber guiding surface tangentially as soon as the inevitable mechanical guidance is interrupted, as happens in the area of the dirt outlet opening.

In order to prevent the spinnable fibers from being detached from the opening roller in the region of the dirt outlet opening in addition to the dirt particles, the dirt outlet opening is designed as a suction opening for an air flow entering into the opening cylinder housing. This directed to the opening roller air flow holds the fibers, which have a relatively large specific surface area in relation to their low mass, quasi as a "pneumatic guide" on the opening roller fixed. The dirt particles, which have a much higher kinetic energy due to their larger mass, overcome this air flow and are thrown tangentially.

In such devices, not only the quality of the cleaning, but also the loss of useful fibers depends to a very high degree on the proper intensity and direction of the incoming suction air flow.

Since in open-end spinning devices a variety of fiber materials, such as cotton, synthetics, linen, regenerated fibers, etc. are processed, has been proposed in the past to install special devices in the area of the dirt outlet openings of the sliver disintegrators, with which the size of the dirt outlet opening or the direction of the incoming air flow can be influenced.

The DE 10 2015 012 911 A1 discloses a sliver disassembling apparatus for an open-end spinning apparatus having an opening roller rotatably mounted in an opening roller housing, a pivotally mounted sliver feed cylinder and a pivot axis for a sliver feeder having a feed table with a sliver clamping area and a subsequent fiber beard support and a sliver compacting element. On the pivot axis for the sliver feeder optionally Faserbandzuführeinrichtungen be positioned that differ with respect to the shape of the tuft support their feed trough.

The fiber sliver disassembling device described makes it possible at any time to react easily and effectively to changes in the fiber material to be spun. That is, if necessary, can be reacted by a simple change of Faserbandzuführeinrichtung and the flow conditions in the area of the dirt outlet openings of the opening roller housing to be adapted to the new conditions.

The optional use of Faserbandzuführeinrichtungen with feeders, which differ in the shape of their tufts, is a simple and advantageous way to optimally adapt a sliver disassembling device to the respective present template sliver. That is, with the sliver disassembling device can be reacted quickly and easily to the different requirements of the different fiber materials.

The DE 10 2011 116 786 A1 a dining table device for a sliver disassembling device of an open-end spinning device comprising a dining table holder and a replaceable to the dining table holder fixable dining table. The dining table has a clamping area for a sliver feed cylinder for conveying a feed ribbon. The dining table and the dining table holder each have mutually contacting connection areas. The dining table also has a fiber beard support with a fiber guide surface. This results in a seamless slideway for the original fiber tape from the clamping area for the sliver feed cylinder to the area of the fiber beard support. By implementing the two-piece dining table apparatus, different materials can be used for the dining table and the dining table holder. The dining table, which comes into contact with the original fiber tape, preferably consists of a hard, wear-resistant material. The dining table can be made by means of an MIM process and coated with a hard chrome layer. The dining table holder is subject to less wear and can be designed as an inexpensive die-cast part.

Dining table and dining table holder are releasably connected together by means of a screw according to the state. This is in principle the interchangeability of the dining table, for example, given wear.

It is the object of the present invention to simplify the interchangeability of the dining table.

The object is achieved by a dining table apparatus for a sliver disintegrator of an open-end spinning apparatus having the following features. The dining table device comprises a dining table holder and a dining table exchangeably fixable to the dining table holder. The dining table has a clamping area for a sliver feed cylinder for conveying a feed ribbon. The dining table and the dining table holder each have mutually contacting connection areas. According to the invention, the connection areas are designed and arranged such that a clamping force between a sliver feed cylinder and the clamping area of the dining table presses the dining table against the dining table holder. The connection areas engage each other in such a way that in all directions there is a positive connection between the connection areas in all directions perpendicular to the direction of the clamping force between a sliver feed cylinder and the clamping area of the dining table.

Due to the positive connection between the dining table and the Speisetischhalter a simple interchangeability of the dining table is guaranteed. In particular, an exchange of the dining table without tools is possible by the present invention. There remains a single direction in which there is no positive connection. Otherwise the connection would not be solvable. When installed, this direction is blocked by the sliver feed cylinder. It is therefore no fastener required. The positive connection between the connecting regions in all directions of the plane perpendicular to the direction of the clamping force between a sliver draw-in cylinder and the clamping region of the feed table exists without further fastening means. The positive connection between the connecting regions in all directions of the plane perpendicular to the direction of the clamping force between a sliver draw-in cylinder and the clamping region of the feed table consists exclusively of the formation of the connecting regions. The dining table and the dining table holder can be interconnected only by the shape of their connection areas and the back pressure of the sliver feed cylinder. The connection areas are each an integral part of the dining table and the dining table holder and inextricably linked thereto. The connecting region of the dining table and the dining table are preferably formed integrally. Accordingly, the connection region of the dining table holder and the dining table holder is preferably formed in one piece.

In order to ensure the positive connection, a connecting region may have a surface with a protrusion and the other connecting region may have a surface with a recess corresponding to the protrusion. To reach the connection, only the connection area of the feed table has to be connected to the connection area of the feed table holders. The survey engages in the recess, so that the positive connection results. The survey is preferably cuboid. The survey can be arranged both at the connection area of the dining table and at the connection area of the dining table holder.

According to an advantageous embodiment of the present invention, the Speisetischvorrichtung may have a replaceable fixable to the Speisetischhalter Faserbandverdichtungselement and the interchangeable fixable Faserbandverdichtungselement in a direction in which the dining table has no positive connection with the Speisetischhalter represent a barrier to the dining table. Fiber compaction elements on dining table devices are known in principle. These are pushed, for example, on the pivot axis of the Speisetischvorrichtung and form a positive connection with this. The fiber compaction element, which as a rule is present anyway, thus acquires an additional function in connection with the present invention.

According to a particularly advantageous embodiment, in the connection region of the feed table and / or the dining table holder, a permanent magnet is arranged so that it exerts a force in a direction in which the dining table has no positive connection with the Speisetischhalter. An arrangement with one or more permanent magnets is particularly advantageous because there is a secure and durable connection with the juxtaposition of the connection areas immediately. The holding force of the permanent magnet or magnets does not have to be particularly large. Above all, they serve to simplify the assembly of the dining table on the dining table holder. Even with a change of the sliver, when the clamping force between the feed table and the sliver draw-in cylinder is reduced, the holding force of the permanent magnet (s) may be advantageous. During the normal spinning operation, as described above, the feeding table is securely held on the feeding table holder by the clamping force, and the holding force of the permanent magnet or magnets is practically irrelevant.

In principle, it is sufficient if either the dining table or the Speisetischhalter has a permanent magnet, if the other element consists of a ferromagnetic material. For the sake of simplicity, both the dining table and the dining table holder may have a permanent magnet, wherein the two permanent magnets are arranged such that they attract to the dining table holder when the dining table is being set up.

The object is also achieved by a sliver disintegrating device with a dining table device with the features explained above and by an open-end spinning device with this sliver disintegrating device.

The invention will be explained in more detail with reference to an embodiment shown in the drawings.

Fig. 1

eine erfindungsgemäße Faserbandauflösevorrichtung;

Fig. 2

eine erste Ausführungsform einer erfindungsgemäßen Speisetischvorrichtung;

Fig. 3

die Speisetischvorrichtung aus Fig. 2 in montiertem Zustand;

Fig. 4

eine zweite Ausführungsform einer erfindungsgemäßen Speisetischvorrichtung;

Fig. 5

die Speisetischvorrichtung aus Fig. 4 mit verschiedenen Speisetischen.

Show it:

Fig. 1

a sliver disintegrating device according to the invention;

Fig. 2

a first embodiment of a dining table device according to the invention;

Fig. 3

the dining table device Fig. 2 in assembled condition;

Fig. 4

a second embodiment of a Speisetischvorrichtung invention;

Fig. 5

the dining table device Fig. 4 with different dining tables.

The Fig. 1 shows a sliver disintegrating device 1 according to the invention. Sliver disintegrating devices are basically known. They serve to dissolve a sliver and then supply it to an open-end spinning device. The sliver disassembling device 1 according to the invention differs from the known sliver disassembling devices only by the design of the dining table device 2. The dining table device 2 is pivotally mounted about the swivel axis 16. The pivot axis 16 is acted upon by a spring element, not shown, so that the dining table device 2 is pressed against the sliver feed cylinder 7. By means of the lever 17, the dining table device 2 can be moved away from the sliver feed cylinder 7. On the pivot axis 16 a sliver compacting element 10 is further arranged. In this case, webs 19 of the fiber band compaction element 10 engage in grooves 18 of the pivot axis 16. This results in the pivoting direction a positive connection between the dining table device 2 and the sliver compaction element 10th

The dining table apparatus 2 comprises a dining table 4 and a dining table holder 3. The connection between the dining table 4 and the dining table holder 3 is an essential part of the present invention and will be explained with reference to the following figures. In the illustrated embodiment, the dining table 4 in addition to the clamping region 5 for the sliver feed cylinder 7 and a tuft support 6 with a Faserleitfläche. The fiber tuft support 6 forms, in addition to the opening roller housing 15 on the circumference of the opening roller 13, a mechanical limitation for the fibers transported by the opening roller 13. In the lower region, the opening cylinder housing 15 has a dirt outlet opening 14. The size of the dirt outlet opening 14 can be changed by the length of the fiber tuft support 6. Thus, the replacement of the feed table 4 allows a change in the dirt outlet opening 14th

The sliver is compacted by the fiber sliver compaction element 10 and fed to the sliver intake cylinder 7. The rotating Faserbandeinzugszylinder 7 transports the sliver up to the likewise rotating opening roller 13. Here, the sliver is dissolved and transported via a Faserleitkanal not shown in the open-end spinning device. Heavier dirt particles are excreted through the protective outlet opening 14.

The Fig. 2 shows a possible embodiment of a dining table apparatus 2 according to the invention. The dining table apparatus 2 of the Fig. 2 comprises a dining table holder 3, a dining table 4 and a sliver condensing element 10 Fig. 2 shows the elements in the unmounted state. The dining table 4 has a clamping area 5 for the sliver feed cylinder 7 and a fiber beard support 6. In order to connect the dining table 4 with the dining table holder 3, the dining table 4 has the connection area 8 and the food holder 3 has the connection area 9. The connecting region 9 of the dining table holder 3 has a square elevation, clearly visible. The connecting region 8 of the feed table 4 has a recess corresponding to the square elevation. When setting the connection area 8 of the dining table 4 to the connecting portion 9 of the dining table holder 3, the survey engages in the recess and thus creates a positive connection. The dining table 4 also strikes against the edge 22 of the dining table holder 3. The Fig. 3 shows the dining table device 2 in the assembled state. Here, the sliver compression element 10 has also been pushed in the direction of the arrow 20 on the pivot axis 16. The sliver compacting element 10 then covers the edge 22, thereby providing a barrier to the dining table 4 in the single direction in which the connecting portions 8 and 9 do not form a positive connection between the dining table 4 and the dining table holder 3. In spinning operation, the sliver is guided over the opening 22 of the fiber sliver compaction element 10 in the clamping region 5 and transported by the sliver feed cylinder 7.

The Fig. 4 shows another embodiment of the present invention in a sectional view. The dining table 4 has an elevation in the connection area and the dining table holder has a corresponding recess in the connection area. In the survey, a permanent magnet 11 is embedded. In the bottom of the recess, a permanent magnet 12 is inserted. The permanent magnets 11 and 12 are arranged and magnetized so that they attract when the connection region of the feed table 4 is applied to the connection area dining table holder 3. The attraction acts in the direction in which form the connecting portions of the dining table 4 and the Speisetischhalters 3 no positive connection.

The Fig. 5 shows the dining table device 2 of Fig. 4 in a three-dimensional representation. Furthermore, the Fig. 5 two alternative dining tables 4 'and 4 "with fiber bearers 6' and 6" different length. The dining tables 4 'and 4 "can be on the dining table 2 of the Fig. 5 mounted. As a result, the size of the dirt outlet opening 14 can be changed.

Claims (6)

A dining table device (2) for a sliver opening device (1) of an open-end spinning device comprising a dining table holder (3) and a dining table (4) replaceably fixable to the dining table holder (3), the dining table (4) comprising a clamping area (5) for a sliver feed cylinder (5). 7) for conveying an original fiber tape, wherein the dining table (4) and the dining table holder (3) each have mutually contacting connecting portions (8, 9),
characterized,
in that the connecting regions (8, 9) are designed and arranged in such a way that a clamping force between a sliver feed cylinder (7) and the clamping region of the feed table (4) presses the feed table (4) against the feed table holder (3), and the connecting regions intermesh with one another in that in all directions of a plane perpendicular to the direction of the clamping force between a fiber sliver draw-in cylinder (7) and the clamping region of the feed table (4) there is positive locking between the connecting regions (8, 9). Dining table device (2) according to claim 1, characterized in that a connecting region (9) has a surface with a protrusion and that the other connection region has a surface with a corresponding recess to the survey (8). A dining table device (2) according to one of the preceding claims, characterized in that the dining table device (2) has a sliver compacting element (10) which can be interchangeably fixed to the dining table holder (3) and in which the replaceably fixable sliver compacting element (10) in a direction in which the dining table (4) has no positive connection with the Speisetischhalter (3), a barrier for the dining table (4). Dining table device (2) according to one of the preceding claims, characterized in that in the connecting region (8, 9) of the feed table (4) and / or the dining table holder (3) a permanent magnet (11, 12) is arranged so that it has a force in a direction in which the dining table (4) has no positive connection with the Speisetischhalter (3). Sliver dissolving device (1) characterized by a dining table device (2) according to one of claims 1 to 4. Open-end spinning device characterized by a sliver disintegrating device (1) according to claim 5.

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