WO2019025107A1

WO2019025107A1 - Flat bar system

Info

Publication number: WO2019025107A1
Application number: PCT/EP2018/067921
Authority: WO
Inventors: Martin Dovern; Andreas Sobotka
Original assignee: TRüTZSCHLER GMBH & CO. KG
Priority date: 2017-08-03
Filing date: 2018-07-03
Publication date: 2019-02-07
Also published as: EP3662098A1; EP3662098B1; DE102017117661A1; CN110799682B; CN110799682A

Abstract

The invention relates to a flat bar system (100) for use with a card for cotton, man-made fibers or such like, and comprises an elongated flat bar (102) to which a magnetic element (103) is fastened, and an elongated flat top strip (104) which on its rear side (107) facing the flat bar (102) has a rear layer containing a ferrous material. The flat top strip (104) can therefore be detachably fastened to the magnetic element (103) of the flat bar (102) by its rear layer (108), using magnetic force. The rear layer (108) comprises a plurality of segments (110), which each contain a ferrous material, and the segments (110) are spaced apart and uncoupled from each other in the longitudinal direction (L) of the flat top strip (104).

Description

DeckelstabsystemFlat bar system

The invention relates to a flat bar system for use on a carding machine for cotton, man-made fibers or the like, according to the preamble of claim 1 and according to the preamble of claim 12.

According to the state of the art, it is known in the field of textile technology to attach clothing strips on associated flat rods by means of magnetic force to a carding machine for treating cotton, man-made fibers or the like. For this purpose, a magnetic element with an adhesive layer is attached to a foot surface of a flat bar. At the back of a clothing strip, which faces the flat bar, a steel sheet is attached by means of an adhesive layer. For attaching the clothing strip on the flat bar, the steel sheet can be brought into contact or in interaction with the magnetic element. If replacement of the clothing strip is required, a separation of the steel sheet adhered to the clothing strip from the magnetic element, and thus disassembly of the flat rod, can be accomplished by using a suitable tool to overcome the holding magnetic force. Such a fastening principle of a clothing strip on a flat rod by means of magnetic force is e.g. known from DE 10 2004 033 509 A1.

In a card according to DE 10 2004 033 509 A1, the flat bars used are made of aluminum, wherein the magnetic elements bonded thereto are formed flat. The steel sheet, which is glued to the back of a clothing strip, also consists of a flat continuous element which extends along the longitudinal axis of the clothing strips. With regard to the various materials, namely on the one hand aluminum (as a material for the production of flat bars), and on the other hand steel (as iron material, for use on the back of the clothing strips, for the purpose of magnetic attachment to the magnetic elements of the flat bars), the attachment principle according to DE 10 2004 033 509 A1 the disadvantage of a different linear expansion of the flat bars and the back of the attached clothing strips, if during operation of the carding temperature changes and thus heating of the clothing occur. The magnetic connection between a magnetic element of a flat bar and the steel sheet of a clothing strip has a high normal force. About the coefficient of friction between the magnetic element and the steel sheet, the normal force transforms into an axial force relative to the flat rod. The resulting force is sufficiently large to cause a tension of the flat bar when heating the clothing, which then leads to quality losses.

Accordingly, the invention has the object, a flat rod system for use on a carding machine for cotton, man-made fibers or the like to the effect that a magnetic attachment of clothing strips on the associated flat bars by magnetic force even when temperature changes do not lead to tension of the flat bars and thus to quality losses ,

This object is achieved on the basis of a flat bar system for use on a carding machine for cotton, chemical fibers or the like according to the preamble of claim 1 and starting from a flat bar system according to the preamble of claim 12 with the respective characterizing features. Advantageous developments of the invention are specified in the dependent claims.

The invention includes the technical teaching that the back layer of a clothing strip has a plurality of segments, each containing iron material, wherein these segments are arranged spaced from each other and decoupled from each other in the longitudinal direction of the clothing strip. For the purposes of the present invention, the term "decoupling" is to be understood as meaning that, when temperature changes occur during the operation of a carding machine, the segments can be displaced relative to one another in the longitudinal direction of the clothing strip. In this way, different coefficients of thermal expansion compared to the material from which the flat bars are made (e.g., aluminum) can be compensated to reduce thermally induced changes in shape of the flat bar system and to prevent distortion of the flat bar system.

Likewise, the invention includes the technical teaching that the at least one segment, which is part of the backing layer of the clothing strip and has magnetic properties, has the same coefficient of thermal expansion as the material from which the flat rod is made, e.g. Aluminum.

The invention is based on the essential finding that a back layer with iron material contained therein is provided on a rear side of a clothing strip facing the flat rod, this iron material not being in the form of a continuous sheet steel sheet but in the form of a plurality of individual segments. By the above-mentioned decoupling of these segments from each other, a displacement of the segments in the longitudinal direction of the clothing strip is possible in the case of thermally induced changes in shape, as a result, to prevent distortion or deformation of the flat rod system, in particular transversely to its longitudinal axis.

In an advantageous embodiment of the invention, the segments, which are provided on the back layer of a clothing strip, each made of steel. The magnetic properties of steel ensures a robust and thus reliable attachment of a clothing strip to an associated flat rod, while at the same time being able to detach the clothing strip from the flat rod again by using suitable tools.

In an advantageous embodiment of the invention, the segments may be attached by means of adhesive to the back of the clothing strip. For this purpose, it is possible to stick the segments directly on the back of a clothing strip. Alternatively, for ease of handling during manufacture, the segments may first be adhered directly to a backing layer, which in turn may then be attached to the back of a trim strip, e.g. is attached by gluing. In this regard, it is understood that the adhesive strength of the adhesive used exceeds the magnitude of the magnetic force acting between the segments and the magnetic element. In this way, on the one hand, a reliable attachment of the clothing strips is ensured on the associated flat bars, and at the same time also ensures that the adhesive layers of the segments or the carrier layer are not dissolved or demolished at a proper disassembly of the clothing strips of the associated flat bars.

In an advantageous embodiment of the invention can be provided that the segments are separated from each other on the back layer of a clothing strip. In other words, in this case the segments are separated from each other and provided in separate pieces. Alternatively, it is also possible that adjacent segments are each connected to each other by a solid state element, with which a displaceability of the segments is ensured relative to each other in the longitudinal direction of the clothing strip. Both of these variants ensure that the back layer of a clothing strip can compensate for the greater thermal expansion of an associated flat rod, which is usually made of aluminum.

In an advantageous embodiment of the invention, the segments and the solid-state joints, with which adjacent segments are connected to each other, integrally formed, i. made of a continuous material, e.g. from a steel sheet. This results in addition to a simplified handling when gluing the segments on the back of a clothing strip also to the advantage of a simplified manufacturability of this plurality of segments, because thus a complex attachment of the individual Festköpergelenke to each adjacent segments is unnecessary.

In an advantageous embodiment of the invention, the segments are connected to each other by a flexible material. The flexible material may be rubber. In particular, in the event that - as already mentioned above - the intended for the back layer of a clothing strip segments are initially present in individual pieces, this leads to the advantage in handling the production of the flat rod system according to the invention, only a part handle. By connecting the segments to the flexible material, e.g. Rubber, is also advantageously prevented that adhesive leaking when gluing the segments on the back of a clothing strip between the segments. For this purpose, it can also be provided that the segments are embedded in a layer consisting of the flexible material. The magnetic properties of the segments, e.g. Made of steel, are not affected by the flexible material.

The above-mentioned use of the flexible material is also suitable for the case that the intended for the back layer of a clothing strip segments are each connected by solid joints. The operation of the solid state joints, namely ensuring a shiftability of the segments in the longitudinal direction of the clothing strip upon the occurrence of thermally induced changes in shape, is not affected by the flexible material.

With the present invention it is achieved that during operation of a carding machine and possible temperature changes, no tensioning of the flat bars and the clothing strip attached thereto by magnetic force is induced.

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

1 shows a cross-sectional view of a flat bar system according to the invention, consisting of a flat bar and a clothing strip attached thereto,

FIG. 2 shows a schematic side view of a carding machine in which the flat rod system according to the invention of FIG. 1 is used;

FIG. 3 shows a plan view of a back side of a clothing strip which is part of the flat rod system according to the invention of FIG. 1,

4 shows a plan view of a back side of a clothing strip according to a further embodiment of the invention, as an alternative to FIG. 3, FIG.

FIG. 5 shows a side view of two segments, connected by means of a solid-state joint,

FIG. 6 shows a simplified side view of a back side of a clothing strip, for use in the flat rod system according to the invention of FIG. 1,

Figure 7 is a simplified side view of a back side of a clothing strip according to another embodiment of the present invention, as an alternative to Fig. 6, and

Figure 8 is a diagram illustrating the different thermal expansions of the materials aluminum and steel, at different temperatures.

Preferred embodiments of a flat bar system 100 according to the invention intended for use on a carding machine for cotton, man-made fibers or the like are explained below with reference to FIGS. 1-8. Identical features in the drawing are each provided with the same reference numerals. At this point it is understood that the drawing is merely simplified and shown in particular without scale.

FIG. 1 shows the flat rod system 100 in a cross-sectional view. The flat bar system 100 comprises an elongate flat bar 102, which is preferably made of aluminum. On the flat bar 102, a magnetic element 103 is attached. An elongate clothing strip 104 with clothing tips 106 is attached to the flat bar 102 adjacent to the magnetic element 103, namely by the use of magnetic force, as will now be explained in detail.

The right portion of the cross-sectional view of Fig. 1 is additionally shown in an enlarged area. It can be seen that the clothing strip 104 has a support member 105 from which the clothing tips 106 protrude downwards. On a rear side 107 of the clothing strip 104 or of its support element 105, segments 110 are fastened by the use of adhesive 112. Similarly, the magnetic element 103 may be secured to the flat bar 102 by use of adhesive 112.

In the representation of FIG. 1, it can not be seen that the magnetic element 103 has a planar design and extends along a longitudinal direction of the flat bar 102.

The segments 110 each contain ferrous material, and thus have magnetic properties. This makes it possible, the clothing strip 104, to which the segments 110 are bonded, by magnetic force to the magnetic element 103 and thus to the flat bar 102 to install. Conveniently, these segments 110 may be made of steel.

The illustration of Fig. 1 shows the flat rod system 100 according to the invention in the assembled state, when a clothing strip 104 is attached by magnetic force to a flat bar 102 as explained. If necessary, it is possible to detach the clothing strip 104 from the flat bar 102 by e.g. by using a suitable tool, the magnetic force between the magnetic element 103 and the segments 110 glued to the clothing strip 104 is overcome.

The flat bar system 100 according to the invention is intended for use with a card K, which is shown in FIG. 2 in a side view. Such a carding machine K comprises a feed roller 1, a feed table 2, lickerin 3a, 3b, 3c, a drum 4, a pickup 5, a doctor roller 6, squeezing rollers 7, 8, a non-woven guiding element 9, a pile hopper 10, take-off

rollers

11, 12, a revolving lid 13 with

cover deflecting rollers

13a, 13b, a can 15 and a can stock 16. The flat bars 102 of the flat bar system 100 according to the invention are attached to the revolving lid 13. The directions of rotation of the rollers are indicated in Fig. 2 with curved arrows. M denotes the center point (axis) of the drum 4. 4b indicates the direction of rotation of the drum 4. With C, the direction of rotation of the traveling lid 13 is in carding position, and D is the return transport direction of the flat bars 102 indicated.

In the following, further details regarding the segments 110 and their attachment to the rear side 107 of a clothing strip 104 are shown and explained in FIGS. 3-7.

3 shows a plan view of the back side 107 of a clothing strip 104 according to an embodiment of the invention, in which the segments 110 are glued as isolated bodies on the back 107. By such a separation of the segments 110, the above-described decoupling of the segments 110 from one another is given, wherein the segments 110 are displaceable relative to one another in the longitudinal direction L of the clothing strip 104, if a thermal expansion occurs during a temperature change or heating.

4 shows a top view of the back 107 of a clothing strip 104 according to another embodiment of the present invention. Here, the segments 110 are each glued to the back 107 of a clothing strip 104, wherein adjacent segments 110 are each connected by a solid-state joint 114. By the solid state joints 114 - in the same way as in the embodiment of Fig. 3 - a displacement of the segments 110 relative to each other in the longitudinal direction L of the clothing strip 104 is ensured.

Fig. 5 shows a simplified side view of two segments 110, which are connected to each other by means of a solid-state joint 114 '. The mode of action of this solid-state joint 114 'corresponds to the variant of a solid-state joint 114 according to FIG. 4.

6 shows a simplified side view of the rear side 107 of a clothing strip 104, to illustrate the attachment of the segments 110 to the clothing strip 104. In this case, the segments 110 are adhesively bonded to the back 107 of the clothing strip 104 by using adhesive 112. If the segments 110 are each made of steel, the segments 110 form a backing layer 108 of the trim strip 104 containing ferrous material.

7 likewise shows a simplified side view of the rear side 107 of a clothing strip 104, and represents a variant of the embodiment of FIG. 6. In the embodiment of FIG. 7, the individual segments 110 are connected to each other by a flexible material 116. The flexible material 116 may be rubber. The connection of the individual segments by the flexible material 116 on the one hand facilitates the handling of the segments 110 in the production, because the plurality of segments 110 can be glued as a part on the back 107 of a clothing strip 104, and on the other hand prevents the adhesive 112 during Gluing the segments 110 on the back 107 of a clothing strip 104 between the segments 110 emerges.

With regard to the embodiments of FIGS. 6 and 7, it should be pointed out that, as an alternative thereto, it is also possible first to glue the segments 110 onto a carrier layer 113 (see FIG. 1, enlarged area), this carrier layer 113 in turn is glued to the back 107 of a clothing strip 104. In this case, such a carrier layer 113 fulfills the function of an adhesive and leveling layer, and simplifies the handling of a plurality of segments 110.

It should be noted at this point that the use of the flexible material 116 (see Figures 6, 7), e.g. Rubber, also in conjunction with a solid-state joint 114, 114 '(see Fig. 4, Fig. 5) is possible, for. to prevent the escape of adhesive in the area of the solid-state joints 114, 114 '. Thanks to the flexible properties of rubber, the operation of the solid-state joints 114, 114 'is not impaired.

The invention now works as follows:

During operation of the card K, temperature changes may occur as a result of which the flat rod system 100 heats up. In this case, there is a longitudinal expansion of both the flat bar 102 and the clothing strip 104, which is different because of the respective thermal expansion coefficients of the materials used for this purpose. Since the coefficient of thermal expansion of aluminum is greater than that of steel, when the flat bar system 100 is heated, the flat bar 102 expands more than the steel segments 110 provided in the backsheet 108 of the garniture strip 104.

According to the invention, when the flat bar system 100 is heated, a different longitudinal extent of the flat bar 102 and the back layer 108 of the clothing strip 104 is prevented by the segments 110 being decoupled from one another in the longitudinal direction L of the clothing strip 104, as explained above. As can be seen in FIGS. 3, 4, 6 and 7, the segments 110 are each arranged at a small distance from each other and thus independent of each other. Such decoupling leads to a displaceability of the segments relative to one another in the longitudinal direction L of the clothing strip 104. Correspondingly, the back layer 108 with the (steel) segments 110 can compensate for the greater thermal expansion of the flat rod 102. As a result, thereby a tension of the flat bar 102 is avoided by the clothing strip 104.

The above-explained relationship of a compensation of the thermally induced different deformation of the materials aluminum and steel is illustrated again in the diagram of FIG. Herein, different temperatures are shown with T1 and T2, wherein the temperature T2 is greater than the temperature T1. In FIG. 8, the

reference numerals

102 and 110 indicate that the material aluminum is used to produce a flat bar 102, the segments 110 being formed with the material steel.

The length expansion at the elevated temperature T2 according to FIG. 8 makes it clear that, because of the majority of steel segments 110, it is possible to compensate for the greater length expansion of the aluminum which is inherently greater. This is symbolized by the vertical dashed line for the temperature range of T2. Such a length compensation would not be possible by a single continuous steel segment in the backsheet 108 of a clothing strip 104.

Bezugszeichenreference numeral

One feed roller

2 Dining Table

3a, 3b, 3c lickers

4 drum

5 customers

6 skimmer

7, 8 squeegee

9 Vliesleitelement

10 sliver trumpet

11, 12 take-off rolls

13 revolving flat

13a, 13b lid deflection rollers

15 pot

16 can coiler

100 flat bar system

102 flat bar (e.g., aluminum)

103 magnetic element

104 clothing strip

105 supporting element (of clothing strip 104)

106 clothing tips

107 Rear side (of clothing strip 104)

108 backsheet (the trim strip 104)

110 segment

112 adhesive

113 carrier layer (adhesive and leveling layer)

114 solid joint

116 Flexible material (e.g., rubber)

C direction of rotation (of the revolving lid 13)

D return transport direction (the flat bars 102)

K carder

L longitudinal direction (of the clothing strip 104)

M center (the drum 4)

Claims

A flat bar system (100) for use on a carding machine (K) for cotton, man-made fibers or the like, comprising an elongate flat bar (102) to which a magnetic element (103) is attached and an elongate clothing strip (104) attached to the flat bar (102) facing back (107) has a back layer (108) containing iron material, so that the clothing strip (104) with its back layer (108) on the magnetic element (103) of the flat bar (102) is releasably secured by magnetic force, characterized characterized in that the backing layer (108) comprises a plurality of segments (110) each containing ferrous material, the segments (110) being spaced apart from each other and decoupled from each other in the longitudinal direction (L) of the clothing strip (104).
Flat bar system (100) according to claim 1, characterized in that the segments (110) are each made of steel.
Flat bar system (100) according to claim 1 or 2, characterized in that the segments (110) by means of adhesive (112) on the back (107) of the clothing strip (104) are attached.
Flat bar system (100) according to claim 3, that the segments (110) are glued directly to the back (107) of the clothing strip (104).
Flat bar system (100) according to claim 3, characterized in that the segments (110) are glued directly to a carrier layer (113) which is attached to the back (107) of the clothing strip (104) in particular by gluing.
Flat bar system (100) according to one of the preceding claims, characterized in that the segments (110) are separated from each other.
A flat bar system (100) according to any one of claims 1 to 5, characterized in that adjacent segments (110) each by a solid-state joint (114, 114 ') are interconnected, with a displaceability of the segments (110) relative to each other in the longitudinal direction (L ) of the clothing strip (104) is ensured.
A flat bar system (100) according to claim 7, characterized in that the segments (110) and the solid-state joints (114; 114 ') provided therebetween are formed in one piece.
A flat bar system (100) according to any one of the preceding claims, characterized in that the segments (110) are interconnected by a flexible material (116).
A flat bar system (100) according to claim 9, characterized in that the segments (110) are embedded in a layer consisting of the flexible material (116).
A flat bar system (100) according to claim 9 or 10, characterized in that the flexible material (116) is formed of rubber.
A flat bar system (100) for use on a carding machine (K) for cotton, man-made fibers or the like, comprising an elongate flat bar (102) to which a magnetic element (103) is attached and an elongated clothing strip (104) attached to the flat bar (102) facing back (107) has a back layer (108) which contains at least one segment (110) with magnetic properties, so that the clothing strip (104) with its backing layer (108) on the magnetic element (103) of the flat bar (102 ) is releasably securable by magnetic force, characterized in that the segment (110) has the same thermal expansion coefficient as the material from which the flat bar (102) is made.
The flat bar system (100) according to claim 12, characterized in that the flat bar (102) is made of aluminum, wherein the segment (110) of the back layer (108) of the clothing strip (104) has the same thermal expansion coefficient as aluminum.
A flat bar system (100) according to claim 12 or 13, characterized in that the segment (110) has the same magnetic properties as steel.
Flat bar system (100) according to one of claims 12 to 14, characterized in that the segment (110) coincides with its longitudinal extent substantially with the flat bar (102).