TWI622681B - Fiber ribbon guide - Google Patents

Abstract

The invention relates to a fiber band guide having a longitudinally elongated base body, in particular on a draw frame, a prickly fluffer or a comber, the base body comprising a guide which is arranged in the outer cover of the base body and / Or the outer cover surface has two guide surfaces spaced apart in the radial direction of the base body to guide a fiber band passing from the side of the base body between the two guide surfaces. The base body is supported by means of the bearing, so that the base body can rotate about its axial axis. According to the invention, the two guide surfaces extend only partially around the circumference of the base body and are spaced apart from one another in order to accommodate a flat fiber ribbon between the two guide surfaces, and the distance between the two guide surfaces is along the The circumferential direction of the base body is continuously reduced.

Description

Fiber band guide

The invention relates to a fiber band guide having a longitudinally elongated base body, in particular on a draw frame, a prickly fluffer or a comber. In addition, the fiber band guide includes a guide provided in an outer cover surface of the base body and / or the outer cover surface and has two guide surfaces spaced apart in a radial direction of the base body so as to be guided from the base body. A fiber band passing by is guided between the two guide surfaces. Furthermore, the base body is supported in a bearing, so that the base body can be rotated about its axial axis.

From US 3,130,453 A, a cylindrical fiber band guide is known which has grooves whose depth remains constant and whose cross section is arc-shaped, wherein the cross section can be varied uniformly. The groove extends here around the fiber band guide. The fiber band guide is rotatable so that fiber bands passing by can turn to different sections of the groove. Depending on which section of the groove the fiber band passing by turns to, the fiber band is compressed more or less strongly. If the fiber band guide is twisted such that a groove area with a smaller cross-section comes into contact with the fiber band, the fiber band is more compressed and narrower. If the fiber band guide is twisted such that the fiber band is in contact with a grooved region having a larger cross section, the fiber band is compressed less and wider. A disadvantage of such a fiber tape guide is that each cross section of the groove must be doubled. Because the groove is closed in the circumferential direction (that is, connected to itself again in the circumferential direction), and if the groove is narrower, it must be widened again to connect to itself, so every time Cross section Faces must be doubled. Therefore, the groove area should be doubled, that is, at a specific position and an opposite position. Such fiber band guides are therefore ineffective and cannot be explicitly assigned to specific locations and associated widths.

It is therefore an object of the present invention to create a fiber tape guide with improved efficiency and uniqueness. This object is achieved by a fiber tape guide having the features of the independent patent claims.

The invention relates to a fiber band guide with a longitudinally elongated base body, in particular on a draw frame, a prickly fluffer or a comber. In addition, the fiber band guide includes a guide provided in an outer cover surface of the base body and / or the outer cover surface and has two guide surfaces spaced apart in a radial direction of the base body. The guide can be provided, for example, as a recess in the outer cover surface of the base body. Therefore, the side of the groove is a guide surface and a part of the base body. Additionally or alternatively, these guide surfaces can be provided on the outer cover surface. These guide surfaces can be formed, for example, from a strip-shaped material and provided on the outer cover surface of the base body. A fiber band passing next to the base body guides between the guide surfaces. When the fiber tape guide is applied in accordance with regulations, the fiber tape abuts on the outer cover surface of the base body. The rolled fiber ribbon flows between the guide surfaces, so that it is guided by the guide surfaces, in particular on both sides of the guide surfaces, and is preferably defined in the axial direction of the base body. These guides and, in particular, these guide surfaces are used to reduce the width of the spread fiber band. The width of the fiber ribbon exiting the fiber ribbon guide depends on the distance between the two guide surfaces, at which the fiber ribbon is guided through the guide surfaces. In particular, the distance between the two guide surfaces does not remain constant, but rather varies over the circumference of the base body. In addition, the fiber band guide also includes a bearing by which the base body is supported, so that the base body can surround its axis Rotate to the axis. As a result, the guide and, in particular, the guide surfaces can also be twisted, so that the guide and, in particular, other areas of the guide surfaces can be brought into contact with the fiber ribbon passing by in a simple manner. If the width of the incoming fiber bands should be reduced, the base body can be twisted in such a way that the fiber bands come into contact with regions of the guide surfaces having a small distance from one another. However, if the two guide surfaces have different slopes and / or contours, the fiber guide can be guided to a defined position for subsequent processing by means of the guide and, in particular, the guide surfaces.

According to the invention, the distance between the two guide surfaces is continuously reduced around the base body in the circumferential direction along the axial direction of the base body. Therefore, the guide, and in particular the two guide surfaces, have only a single distance. The two guide surfaces have the greatest distance on their mutually facing ends (ie, the two ends of the two guide surfaces), and the two ends are disposed at the same angle on the circumference. At the other two ends of the two guide faces (they also face each other), the two guide faces have the smallest distance. In the meantime, the pitch becomes smaller continuously, so it is preferable that the pitch does not double. As a result, the efficiency is improved, because if there is no doubled pitch, the expansion of these guide surfaces in the circumferential direction around the base body can be better utilized, and the area without the guide surfaces is wasted.

The distance between the two guide surfaces allows the fiber ribbon guided between these guide surfaces to be matched to their width. These two guide surfaces compress the width of the rolled out fiber ribbon according to their spacing. Since the distance between the two guide surfaces is continuously reduced, and therefore the distance does not double, a larger distance area is achieved. The deviation between the maximum and minimum pitch is called the pitch range. The fiber band guide is more efficient because each pitch value doubles in the prior art.

These guide surfaces also extend only partially around the circumference of the base body. This is simplified The manufacturing process of the guide surface. If the guide surfaces are formed, for example, by the side walls of the groove, the groove need not be milled around the entire circumference. If these guide surfaces are provided, for example, on the outer cover surface of the base body by means of a strip-shaped material, this also reduces production costs. Another advantage is that, when the guide surfaces are provided only locally, the fiber band guide and, in particular, the base body can be arranged near the subsequent processing position of the fiber band.

An advantageous development of the invention is that the fiber band guide has a belt turning position by means of which the incoming fiber band can be turned. In a predetermined direction of travel of the fiber ribbon, the ribbon turning position is set before the base body. Additionally or alternatively, the belt turning position can also be provided behind the base body. As a result, the incoming fiber band can be guided through in a controlled manner, especially between the guide surfaces. In addition or in addition, the incoming fiber band can also be rolled out in a belt turning position. As a result, the quality of the fiber band can be improved, because the prior spreading and subsequent compression of the fiber band improves the uniformity of the fiber band, especially with the aid of the guide surface. The weak positions and thickened positions appearing before are fused alternately, so the thickness of the individual fibers becomes more uniform in a single area of the fiber ribbon.

It is also advantageous if the base body is designed to be rotationally symmetrical about its axial axis. The base body therefore also always has the same contour when twisted. It is thus ensured that the fiber band is always guided in the same manner on the outer cover surface of the base body.

It is also advantageous if the base body is cylindrical. This simplifies the manufacturing process of the substrate.

It is also advantageous if the outer cover surface of the base body is convex and / or concave. Since these guide surfaces usually only act on the edge regions of the fiber band, it is advantageous if the cover surface is arranged recessed between the guide surfaces. As a result, the fiber band moving on these covers is also compressed in this area, as it projects towards the lowest point of the recessed cover. With the help of the protruding outer The cover can loosen the fiber band because it projects from the highest point of the cover and separates. This increases the efficiency of the fiber ribbon.

It is also advantageous if the fiber guide has a drive by means of which the base body can be rotated about its axial axis. The drive can be configured as an electric drive (for example a servo motor), a pneumatic drive and / or a hydraulic drive. The base body can be twisted particularly precisely and quickly by means of the drive. If, for example, the degree of compression of the fiber band is continuously measured, especially before the fiber band guide, the base body can be adjusted at positions where the fiber band has different compressions in such a way that the base body is twisted correspondingly at these positions and therefore balanced Compression at these locations. The fiber band guides have suitable sensors for this purpose, which measure the degree of compression. In addition, the fiber ribbon guide has a control unit that evaluates the sensor value and controls the drive accordingly. By improving the uniformity of the fiber ribbon, the quality of the fiber ribbon is improved.

Additionally or alternatively, if there is another adjustment proposal for the fiber band guide, the drive can also automatically adjust the fiber band guide. The adjustments are generated, for example, based on fiber information, such as the total number of fibers and fiber accuracy and / or the total weight of the fiber ribbon (ktex, Ne, etc.) and / or the weight of a single fiber ribbon (ktex, Ne, etc.) and the number of fiber ribbons (replication). Suggest. Therefore, it is possible to quickly and reliably adjust the fiber band guide to another fiber band without using human labor.

It is also advantageous if the fiber band guide has a display element with which the orientation of the base body can be displayed. As a result, maintenance personnel can understand the current orientation of the substrate. In particular, the maintenance person knows at which position the fiber band is guided between the guide surfaces, and at what positions the guide surfaces are spaced. In addition, the orientation can be recorded, so that the adjustment of the base body can be adjusted again (the adjustment is advantageous by means of this value), in particular torsion, so that Use this fiber tape guide. However, the display element can also be used to adjust the fiber ribbon guide according to adjustment recommendations. The display element can include, for example, a scale, so that the correct orientation of the fiber band guide can be manually adjusted for the adjustment advice by means of the scale. The fiber band guide is twisted so long by hand until the scale shows the correct orientation for the preset adjustment recommendation.

It is also advantageous that the base body has a stop element, by means of which the base body can be fixed in orientation. It is thus possible to prevent the base body from being twisted, for example, due to vibrations of the machine.

A particularly advantageous development of the invention is that the two guide surfaces form a thread on the outer cover surface of the base body, so that they extend together towards the middle of the base body. The two guide surfaces can be configured to rotate in the opposite direction, that is, one guide surface is configured to rotate to the right and the other guide surface is configured to rotate to the left. Each guide surface therefore constitutes a spiral on the outer cover surface of the base body. The slope of the spiral around the circumference of the base body can in particular be constant. However, the slope of the spiral can also be variable. The distance between their two guide surfaces acting on the fiber band can be adjusted particularly easily by means of these spirals. The two helical guide surfaces can also have different slopes. Therefore, the fiber ribbon can be pushed in the axial direction of the base body.

It is also advantageous if the two guide surfaces are configured mirror-symmetrically. These guide surfaces are configured, for example, mirror-symmetrically to the cross section of the base body. Therefore, both sides of the fiber ribbon can be guided on the two guide surfaces in the same manner.

It is also advantageous if the two guide surfaces each have an angle between 20 ° and 70 °, in particular between 40 ° and 60 °, in the circumferential direction of the base body. Since the fiber bands passing by are arranged parallel to the circumferential direction of the base body, the fiber bands have the same angle towards the guide surfaces. With a smaller angle, the fiber band can be guided more carefully. Conversely, with a higher angle, the fiber band can be compressed more strongly.

It is also advantageous if the guide surface extends around the circumference of the base body at an angle between 150 ° and 330 °, in particular at an angle of 180 °. If these guide surfaces continue to extend around the circumference of the base body, a larger distance range can be formed when the inclination of the guide surfaces is the same. The deviation between the maximum and minimum distances between these guide faces is called the distance range. If the guide surface is arranged around the base body at a small angle, this simplifies the manufacturing process.

It is also advantageous if the two guide faces have an angle between 0 ° and 30 ° towards the radial direction of the base body. These guide surfaces are preferably bent away from the fiber band that is guided between the guide surfaces. As the fiber ribbon leaves the guide surface, the fiber ribbon therefore does not slide on the edges, which edges form the edges of the guide surfaces. As a result, the friction between the fiber ribbon and these edges is reduced, which reduces wear.

This is also advantageous if the base body and the guide surface are formed in one piece. Therefore, the base body and the guide surface can be produced particularly quickly in a small number of working steps. For example, a matrix having a guide surface can be cast, so that a fiber band guide can be manufactured quickly and inexpensively.

In order to reduce the friction between the fiber ribbon passing by the side and the cover surface and / or the guide surface, it is advantageous if the base body and / or the two guide surfaces are coated with a surface coating. As a result, the durability of the fiber ribbon guide is extended, and the risk of fiber ribbon damage is reduced. The surface coating can be formed by a chromium layer, which, for example, is free of bulges in order to produce the effect of lotus flowering. These bulges are here, for example, spherical.

It is also advantageous if the maximum distance between the two guide surfaces in the axial height direction of the base body is between 10 cm and 15 cm. Additionally or alternatively, the minimum distance between the two guide surfaces in the axial height direction of the base body is between 2 cm and 6 cm. The maximum distance is determined here, the incoming fiber band How wide can it be for guidance by means of a fiber guide. This minimum distance determines the minimum width of the output fiber ribbon.

The invention also relates to a system consisting of a fiber tape guide, which has at least one fiber tape guide according to the preceding description. According to the invention, the system has a plurality of fiber band guides. If the fiber band should be guided over a wide section, multiple fiber band guides can be provided in sequence. For example, one fiber band guide can compress the fiber band, and the other fiber band guide pushes the fiber band in the axial direction of the base of the fiber band guide.

1‧‧‧ fiber belt guide

2‧‧‧ substrate

3‧‧‧ outer cover

4a, 4b‧‧‧Guiding surfaces

5‧‧‧bearing

6‧‧‧fiber ribbon

7‧‧‧ with steering position

8‧‧‧Max pitch

9‧‧‧ minimum spacing

DR‧‧‧Rotation direction

LR‧‧‧ Direction of travel

α‧‧‧ angle

Further advantages of the invention are illustrated in the following examples. Among them: Fig. 1 shows a perspective view of a fiber tape guide having two guide faces; Fig. 2 shows a side sectional view of the fiber tape guide and a tape turning position; and Fig. 3 shows a fiber tape guide with two guide faces Top view of the unfolded cover of the device.

A perspective view of the fiber band guide 1 is shown in FIG. 1. The fiber tape guide 1 includes a base body 2 with a cover surface 3, two guide surfaces 4 a and 4 b, and a bearing 5. The base body 2 can be configured to be rotationally symmetrical. As is shown in this embodiment, the base body 2 can preferably be formed into a cylindrical shape. However, the base body 2 can also have a concave and / or convex outer cover surface 3. The area of the cover surface 3 between the guide surfaces 4a, 4b is formed in particular as concave and / or convex, because a fiber band 6 (see FIG. 2), which is not shown here, is guided through this area. The fiber band 6 is guided over the outer cover surface 3, wherein the fiber band 6 surrounds the outer cover surface 3 in the circumferential direction of the base body 2 only in a small area (see FIG. 2). In this case, the fiber band 6 is defined on its side in the axial direction of the base body 2 on the respective guide surfaces 4a, 4b. If entering and the flatly spreading fiber band 6 has a position in this position than the guide surfaces 4a, 4b The width of the fiber tape 6 is larger, and the fiber tape 6 is in contact with the guide surfaces 4a, 4b at this position, and the width of the fiber tape 6 is particularly reduced. The fiber band 6 can also be limited to the guide surfaces 4a, 4b in the axial direction of the base body 2 here.

By means of the bearing 5, the base body 2 is rotatably supported about its axial axis. Advantageously, the bearings 5 are arranged on both ends of the base body 2 to achieve stable support of the base body. The base body 2 is rotatable around the rotation direction DR. The base body 2 can be rotated in the clockwise direction, for example, so that the distance between the guide surfaces 4a, 4b is greater on the upper side of the base body 2 in the drawing. Here, the width of the fiber band 6 passing through this position is compressed and / or guided to a lesser extent. In contrast, if the base body 2 is rotated counterclockwise, the distance between the guide surfaces 4a, 4b on the upper side of the base body 2 becomes smaller again. As a result, the fiber band 6 passed through in this position is guided more strongly and / or compressed more strongly over its width, so that the resulting fiber band 6 has a smaller width.

FIG. 2 shows a sectional side view of a fiber ribbon guide 1 with a belt turning position 7. The fiber tape guide also includes a base body 2 with a cover surface 3. The fiber band 6 is guided by the outer cover surface 3, which in a region comes into contact with the outer cover surface 3. The fiber band 6 is also guided between two guide surfaces 4a, 4b (see FIG. 1), of which only the guide surface 4b is shown in this embodiment. In addition, the guide surface 4b is arranged to surround the circumference of the base body 2 at an angle of 270 °. Therefore, the base body 2 can be rotated around its axial axis in the rotation direction DR at an angle range of 270 °, and thus the fiber band 6 is also guided. In this embodiment, the base body 2 can be rotated, for example, counterclockwise at an angle of about 90 ° and / or clockwise at an angle of about 180 °, wherein the fiber ribbon 6 is always guided by the guide surfaces 4a, 4b.

A belt turning position 7 is provided in front of the base body 2 or against a predetermined travel direction LR of the fiber belt 6. Alternatively, the belt turning position 7 can also be arranged behind the base body 2. It can have There is an expansion similar to that of the base body 2. The belt turning position 7 is in particular also a long, cylindrical object, through which the fiber band 6 is guided. However, the belt turning position can also have a concave and / or convex cross section. This belt turning position 7 can also be used as a guide for the fiber belt 6. However, the belt turning position 7 does not have guide surfaces 4a, 4b, in particular it has only one cover surface. However, the fiber band 6 is advantageously guided below the belt turning position 7 as shown in this embodiment, and then guided on the base body 2, so that the fiber band 6 is “tensed” between these two points. Alternatively, the fiber band 6 is also first turned through the band to position 7 and then guided underneath the base body 2, wherein the fiber band is likewise “tensioned”.

FIG. 3 shows the expanded cover surface 3 of the base body 2 (see FIG. 1) having the guide surfaces 4 a and 4 b. The base body 2 is therefore shown as flat. Therefore, the cover surface 3 expands over the entire circumference of the base body 2 in the circumferential direction. Note here that one side is directly connected to the other side in the circumferential direction.

The two guide surfaces 4a, 4b are therefore no longer helical in this view, as in FIG. 1, but are brought together at an angle α. This angle α is set between the guide surface 4b and the circumferential direction. The guide surfaces 4a have the same angle here, because the two guide surfaces 4a, 4b are mirror-symmetrical to each other. Alternatively, the guide surfaces 4a, 4b may also have a larger angle α, so that the two guide surfaces 4a, 4b are no longer mirror-symmetrical.

The two guide surfaces 4a, 4b have a maximum distance 8 and a minimum distance 9 in the axial direction. The distance between the two guide surfaces 4a, 4b continuously decreases from the maximum distance 8 in the circumferential direction to the minimum distance 9. In this embodiment, the pitch becomes linearly smaller. However, the distance can also be reduced non-linearly, for example, exponentially, logarithmically, parabolically, and / or hyperbolically.

The invention is not limited to the embodiments shown and described. Even though they are disclosed and described in different embodiments, the set of variations and features within the framework of the patent claims It is equally possible.

Claims (18)

A fiber tape guide having a longitudinally long base body, the base body comprising a guide provided in the outer cover surface of the base body and / or the outer cover surface and having two guide surfaces spaced apart in a radial direction of the base body In order to guide the fiber band passing from the side of the base body between the two guide surfaces, the fiber band guide also has a bearing by which the base body is supported, so that the base body can surround its axial direction The axis rotates, characterized in that the two guide surfaces extend only partially around the circumference of the base body and are spaced from each other so as to accommodate a flat fiber ribbon between the two guide surfaces, and the two guide surfaces The pitch of the substrate is continuously reduced along the circumferential direction of the substrate. The fiber tape guide according to item 1 of the patent application scope, wherein the fiber tape guide has a tape turning position, which is set before the base body in a preset running direction (LR) of the fiber tape, And the incoming fiber band can be turned and / or rolled out by means of the band turning position. The fiber band guide according to item 1 of the patent application scope, wherein the base body is configured to be rotationally symmetrical about its axial axis, and it is configured to be cylindrical, convex, and / or concave. The fiber ribbon guide according to item 1 of the patent application scope, wherein the fiber ribbon guide further has a driver by which the base body can be rotated about its axial axis. The fiber tape guide according to item 1 of the patent application scope, wherein the fiber tape guide further comprises a display element with a scale, by which the orientation of the substrate can be displayed and manually adjusted. According to the fibrous tape guide of claim 1, wherein the base body further has a stop element, the base body can be fixed by the stop element. The fiber tape guide according to item 1 of the patent application scope, wherein the two guide surfaces form opposite thread lines on the outer cover surface of the base body, so they extend toward the middle of the base body together. The fiber ribbon guide according to item 1 of the patent application scope, wherein the two guide surfaces are configured to be mirror-symmetrical. The fiber tape guide according to item 1 of the patent application scope, wherein the two guide surfaces respectively have an angle (α) between 20 ° and 70 ° toward the circumferential direction of the base body. The fiber tape guide according to item 1 of the patent application scope, wherein the two guide surfaces respectively have an angle (α) between 40 ° and 60 ° toward the circumferential direction of the base body. The fiber tape guide according to item 1 of the patent application scope, wherein the two guide surfaces extend around the circumference of the base body at an angle between 150 ° and 330 °. The fiber tape guide according to item 1 of the patent application scope, wherein the two guide surfaces extend around the circumference of the base body at an angle of 180 °. The fiber band guide according to item 1 of the patent application scope, wherein the two guide surfaces have an angle between 0 ° and 30 ° toward a radial direction of the base body. The fiber tape guide according to item 1 of the patent application scope, wherein the base body and the two guide surfaces are integrally formed. The fiber tape guide according to item 1 of the patent application scope, wherein the base body and / or the two guide surfaces are coated with a surface coating. The fiber tape guide according to item 1 of the patent application scope, wherein the maximum distance between the two guide surfaces in the axial height direction of the substrate is between 10 cm and 15 cm, and / or the two guide surfaces are along the substrate. The minimum distance in the axial direction is between 2 cm and 6 cm. The fiber belt guide according to item 1 of the patent application scope, wherein the fiber belt guide is used in a draw frame, a fruit pile raising machine, or a combing machine. A system having a plurality of fiber ribbon guides, wherein each of the fiber ribbon guides has the fiber ribbon guide according to any one of claims 1 to 16.