Abstract
The subject of the publication includes a method for manufacturing weaving reeds (9), in which, to form the dents (1) of the reed (9), strip- or tape-shaped objects (1) are joined together at a given distance apart (A) in the widthwise direction (B) of the reed (9).
It is considered novel and inventive that at least one of the strip- or tape-shaped objects (1) is provided with a prescribed amount (10-18) of at least one viscous substance applied to its areal surfaces (8), particularly to the end portions (E) thereof, said areal surfaces facing in the widthwise direction (B) of the reed (9), and are then joined together.
The application also includes a device (30) for manufacturing reeds (9), and a reed (9) produced using the aforementioned method.
Claims
1. Method for manufacturing weaving reeds (9), the method comprising: joining together strip- or tape-shaped objects (1) at a given distance apart (A) in a widthwise direction (B) of the reed (9) to form dents (1) of the reed (9), providing, to accurately set a given inter-dent distance, at least one of the strip- or tape-shaped objects (1) with a prescribed amount (10-18) of at least one viscous substance applied to its areal surface (8), which faces in the widthwise direction (B) of the reed (9), joining the strip- or tape-shaped object to a next strip- or tape-shaped object of the strip- or tape-shaped objects.
2. Method according to claim 1, further comprising applying the prescribed amount (10-18) of viscous substance dropwise (10, 11, 12), layerwise (15), in punctiform manner (10, 11, 12), or in a form of a bead (13, 14).
3. Method according to claim 1, wherein at least one of the strip- or tape-shaped objects (1) is cut to length and has a prescribed amount (10-18) of a viscous substance applied to at least one of its areal surfaces (8) and is then brought together with a further strip- or tape-shaped object (1).
4. Method according to claim 1, further comprising forming a permanent join (10) between at least two strip- or tape-shaped objects (1) with the prescribed amount (10-18) of at least one viscous sub stance.
5. Method according to claim 1, further comprising permanently setting the distance (A) between at least two strip- or tape-shaped objects (1) with the prescribed amount (10-18) of at least one viscous substance.
6. Method according to claim 1, wherein the setting of the distance (A) between at least two strip- or tape-shaped objects (1) is effected as early as when the two strip- or tape-shaped objects (1) are initially brought together.
7. Method according to claim 1, further comprising using at least one of the least one viscous substance whose curing can be significantly influenced by energy input.
8. Method according to claim 1, further comprising using the at least one viscous substance including using at least a first and a second viscous substance having different curing properties.
9. Method according to claim 1, further comprising curing at least one of the at least one viscous substance at least partially before the two strip- or tape-shaped objects (1) are brought together for the first time.
10. Method according to claim 1, further comprising measuring distances between the at least two strip- or tape-shaped objects (1) after they have been brought together and the prescribed amounts (10-18) of the at least one viscous substance applied and/or the contact pressure used to bring the objects (1) together are controlled according to the distances via an open- or closed-loop control system.
11. Device for joining dents for the production of weaving reeds, the device comprising: a metering device (34) configured to apply a prescribed amount (10-18) of a viscous substance to areal surfaces (8) of the dents (1), at least one handling device configured to convey the coated dent from a coating position to a position in which a coated surface of the dent comes into contact with a previously attached dent.
12. Weaving reed comprising: a plurality of strip- or tape-shaped objects (1), which assume a function of dents (8) and are arranged in a row at a given distance apart (A) in a widthwise direction (B) of the reed (9), at least a first body (39) made of a prescribed, cured amount of an originally viscous substance, which is located between areal surfaces (8) of two of the strip- or tape-shaped objects (1) and which is in contact with the areal surfaces (8) of the two strip- or tape-shaped objects (1).
13. Weaving reed according to claim 12, further comprising at least one further body (39), which also comprises a prescribed, cured amount of an originally viscous substance and which has a same volume as the first body.
14. Weaving reed according to claim 12, further comprising: at least one frame area (25), in which the dents (1) are interconnected, wherein the at least one frame area (25), in which the dents (1) are interconnected, terminates sooner at an end nearer a central portion of the reed (9)as seen in an elevational direction (H)on one of the reed's two sides than on an other.
15. Weaving reed according to claim 12, further comprising: at least one frame area (25), which is bounded in at least two spatial directions by plate-like objects (21, 22, 23), wherein one of the at least one plate-like object (21, 22, 23) bounding the frame area in a first spatial direction of the at least two spatial directions is not formed integrally with at least one of the at least one plate-like object (21, 22, 23) bounding the frame area in a second spatial direction of the at least two spatial directions.
Description
[0041] The present invention will now be explained in more detail on the basis of embodiments thereof and the drawings. Advantageously, the features described for the individual embodiments generally apply to the invention in its most general form.
[0042] FIG. 1 is a sectional diagram of a prior-art reed, as seen looking at an areal surface of a dent.
[0043] FIG. 2 is a sectional diagram of a reed according to the invention, as seen looking at an areal surface of a dent.
[0044] FIG. 3 is a sectional diagram of a further reed according to the invention, as seen looking at an areal surface of a dent.
[0045] FIG. 4 is a sectional diagram showing a detail of a stack of dents as per the invention for a reed, looking in the warp-thread direction.
[0046] FIG. 5 is a diagram of a device according to the invention.
[0047] FIG. 6 is a diagram of a reed.
[0048] FIG. 7 shows a similar reed to that of FIG. 6.
[0049] FIG. 1 is a sectional diagram of a prior-art reed 6, as seen looking an areal surface 8 of a dent 1. This viewing direction corresponds to the widthwise direction B of the reed 9. The dent 1 is bounded in each case at the top and bottom by a frame 2 of the reed 9, the frame 2 being executed as a U-shaped profile. The adhesive joining the dent 1 and frame 2 of the reed 9 is not shown. This adhesive is in the space, which again is not shown, between the U-shaped profile and the dent 1 and, to some extent, between the areal surfaces 8 of adjacent dents 1. The semi-circular rods 3 adjoining the frame 2 of the reed 9, as well as the wires 4 wound around the rods 3, are also shown. In addition, the diagram shows three spiral springs 5 adjoining each of the semi-circular rods. The spiral springs 5 and the semi-circular rods 3 are masked by a covering of adhesive 6, which is flush with the frame 2 of the reed 9. Many prior-art embodiments are known, which differ, for example, in the number of spiral springs. Moreover, these spings 5 are sometimes also located in the frame 2 of the reed 9, within the U-shaped profile. However, all the possible prior-art variants have two features that impair their quality: firstly, the wire 4, which is wrappped around the dents 1 and the semi-circular rods 3, confines adhesive introduced into the frame 2 of the reed 9 inside the frame 2, and the dents 1 are not bonded between the wires 4 and the spiral springs 5; secondly, the dents 1 are clamped between the semi-circular rods 3 by the wire 4, so that, on account of the inevitable variation in the width of the dents 1, individual dents 1 are either not anchored properly (in the case of narrower dents 1) or are bent (in the case of broader dents 1).
[0050] FIG. 2 is a sectional diagram of a reed according to the invention, as seen looking at an areal surface 8 of a dent 1. In this first illustrative embodiment, as in all the following illustrative embodiments according to the invention, it is first of all evident that no semi-circular rods 3, wires 4 or spiral springs 5 are required, and therefore no adhesive bond 6 to cover them. Accordingly, it is immediately recognizable that the interspace between the frame members 2 of the reed 9 is larger in the elevational direction H while the overall height G remains the same. This may be used to advantage in that the reed 9 according to the invention may be designed with a smaller overall height G, a measure which, considering the forces of inertia that prevail during weaving, can increase the service life and reduce the load on the loom.
[0051] To simplify the drawing, no free space between the frame 2 of the reed 9 and the dent 1 is shown in FIG. 2. The adhesive with which the frame 2 of the reed 9 is bonded to the dents 1 has also been omitted to simplify the drawing. Twelve circles are shown within the upper frame 2 of the reed 9, which are denoted as adhesive drops 10 or punctiform spacers 11. The number of circles, their form of arrangement and their designation as adhesive drop 10 or punctiform spacer 11 have been selected at random here and may be adapted arbitrarily to the requirements made on the reed 9 in question. In particular, it is possible to use only adhesive drops 10. The different adhesive drops 10 or punctiform spacers 11 may, moreover, comprise different materials if this is beneficial to the specific application. The same applies to the area within the lower frame 2 of the reed 9 in FIG. 2. Here, by way of example, an adhesive/spacer bead 13 in extended form is shown, along with an adhesive/spacer bead 14 in closed form.
[0052] In the central portion as seen in the elevational direction H of FIG. 2, i.e. in the portion between the two frame members 2 of the reed 9, nine circles are shown. These are referred to as punctiform spacers 12 in the interspace. Here too, the arrangement in three rows of three punctiform spacers each is arbitrary. Any other arrangement would be possible for all the illustrative embodiments. The possibility of these punctiform spacers, although denoted as such, also having an adhesive effect is furthermore not ruled out. What is important in this central portion, in which, in the loom, the warp threads are guided between the dents 1, is that, on completion of reed manufacture, the spacers can be removed largely free of residues.
[0053] FIG. 3 is a sectional diagram of a reed 9 according to the invention, as seen looking at an areal surface 8 of a dent 1. The display of adhesive drops 10 and punctiform spacers 11 within the lower frame 2 of the reed 9 differs to that in FIG. 2. The adhesive/spacer surface 15 shows a further alternative for applying the substance in question. The extended adhesive/spacer bead 13 has been applied at an oblique angle to the lateral edges of the dent 1. A special configuration of this kind may serve to prevent the adhesive applied inside the frame 2 of the reed 9 for its later anchorage from penetrating into the area between the frame members 2 of the reed 9. Here, it would have to be removed later on so as not to hinder the passage of warp threads. It is also conceivable to execute an extended adhesive/spacer bead 13 not only in linear but also in curved form.
[0054] FIG. 3 also shows various possible configurations for multi-component frames 20 of the reed 9. Here, the multi-component frames 20 of the reed 9 are asymmetric. The profiles on the warp-thread entry side 41 and the warp-thread exit side 42 extend to different degrees in the elevational direction H. In particular, a first frame profile 21 may be provided with a projection 24. This projection 24 may take on the function of a sealing lip to hinder adhesive for anchoring the multi-component frame 20 of the reed 9 from penetrating into the central area of the reed, in which the warp threads are guided. The warp-thread direction K is shown for purposes of clarity. The warp-thread entry side has been labelled as 41 and the exit side as 42. In another conceivable configuration for the multi-component frame 20 of the reed 9, a profile in the position of the profile 22 in the drawing would be omitted.
[0055] FIG. 4 is a schematic sectional diagram in warp-thread direction K showing a detail of a stack 7 of dents 1. FIG. 4 is also simplified: All the adhesive drops and punctiform spacers are shown with a rectangular cross section. Depending on the procedural sequence and on a wide range of parameters, the sides of the adhesive drops and/or punctiform spacers in the sectional view may also be concave or convex. The dents 1 have been cut off at the right-hand edge of the drawing. Moreover, the ratio of the distance between the punctiform spacers 12 in the interspace and the punctiform spacers 11 may be incorrect relative to the shown distance T, (consisting in this context of the dent thickness plus the inter-dent gap width), or at least not correspond to the scale used in FIGS. 2 and 3.
The drawing shows sections of four dents 1. The dent stack 7 is ready for the addition of a fifth dent 1 from above.
It should be mentioned at this point that a reed 9 may have a length of 0.5 m or less up to 4 m or more, and accordingly may have a large number of dents 1. With the method of the invention, there are no upper or lower limits concerning the length of the reed to be manufactured.
As already mentioned, the dent stack 7 shown in the drawing is ready for the addition of a fifth dent from above. Punctiform spacers 11, an adhesive drop 16 which, in this example, is elevated, and an interspace punctiform spacer 12 have already been applied onto the uppermost dent. As explained earlier, all of these punctiform spacers/drops may be applied to the next dent to be added. It is also possible, for example for reasons of procedural efficiency, to apply adhesive/spacers both onto the stack 7 of dents and to the next dent 1 to be added.
[0056] FIG. 4 shows two additional examples of advantageous embodiments. An adhesive/spacer stack 17 is shown between the bottom and the next-bottom dent 1. As well as arranging adhesive drops and punctiform spacers beside each other (so as to form beads and expanses), they may also be arranged on top of each other. The drawing also shows a sunken punctiform spacer 18. Particularly where a plurality of different viscous substances is used, different prescribed amounts may be selected, enabling the use of elevated 16 and sunken 18 adhesive drops/punctiform spacers.
[0057] FIG. 5 is a diagram showing an example of a device 30 according to the invention. Dent strip 32 is fed from a coil 31 of dent strip to a handling device, in this case a vacuum gripper 35. A cutting device 33 separates off a dent 1 from dent strip 32, the dent 1 then being held by a vacuum gripper 35. The vacuum gripper 35 is shown as a diagrammatic cut view, in which the evacuated space 36 of the vacuum gripper 35 is also visible. The vacuum gripper 35 presents an areal surface 8 of the dent 1 to the metering device 34. The metering device 34 applies prescribed amounts of one or more viscous substances to the areal surface 8. Adhesive drops/punctiform spacers 10-18 are already visible on the areal surface 8 of the dent 1, while an adhesive drop/punctiform spacer 19 is still in the air between the metering device 30 and the dent 1. The dent 1 is joined to the dent stack 7 by a further movement in a direction 38. The reed's distance T (dent width plus inter-dent gap width) and the various forms of adhesive drops and punctiform spacers 10-18 are shown.
[0058] FIG. 6 is a diagram of a reed 9 according to the invention. The overall height G in the elevational direction H, the reed's widthwise direction B and the warp-thread direction K are shown for purposes of clarity. The frame areas 25 of the reed 9 are also shown. The frame areas 25 of the reed 9 are those parts, seen in the elevational direction H, of the reed 9 in which it is not possible for the warp threads to pass through the reed 9. In the reed 9 according to the invention, the frame area begins with the frame members 2, 20. In prior-art reeds, the frame area 25 of the reed 9 begins with the spiral springs 5 or the wires 4, which are wrapped around the dents 1.
[0059] FIG. 7 is a diagram showing a similar reed 9 to that of FIG. 6. The upper frame member 2 of the reed 9 has been omitted, thereby making the originally viscous (first and additional) bodies 39 visible, which are otherwise concealed by the frame member 2 of the reed 9. In the illustrative embodiment shown in FIG. 7, these originally viscous bodies have the same volume.
TABLE-US-00001 List of reference numerals 1 Dent 2 Reed frame, U profile 3 Semi-circular rod 4 Wire 5 Spiral spring 6 Covering of adhesive 7 Stack of dents 8 Areal surface of a dent 9 Reed 10 Adhesive drop, prescribed amount 11 Punctiform spacer, prescribed amount 12 Punctiform spacer in the interspace, prescribed amount 13 Open-ended bead of adhesive/spacer, prescribed amount 14 Closed bead of adhesive/spacer, prescribed amount 15 Expanse of adhesive/spacer, prescribed amount 16 Elevated drop, bead or expanse of adhesive, prescribed amount 17 Stack of adhesive/spacer, prescribed amount 18 Sunken punctiform spacer, prescribed amount 19 Adhesive drop/punctiform spacer in the air 20 Multi-component reed frame 21 First frame profile 22 Second frame profile 23 Third frame profile 24 Projection 25 Frame/peripheral area of reed 30 Device 31 Coil of dent strip 32 Dent strip 33 Cutting device 34 Metering device 35 Vacuum gripper 36 Evacuated space in vaccum gripper 37 Gripper's first direction of movement 38 Gripper's second direction of movement 39 Originally viscous (first and additional) body 41 Warp-thread entry side 42 Warp-thread exit side A Inter-dent distance (= gap width) B Widthwise direction of reed 9, direction perpendicular to the areal surface 8 E End portions of the dent G Overall height of the reed 9 H Elevational direction K Warp-thread direction T Distance consisting of dent thickness plus inter- dent gap width
