AU2005203629B2

AU2005203629B2 - Winding Device for Removing Cut Binding Material

Info

Publication number: AU2005203629B2
Application number: AU2005203629A
Authority: AU
Inventors: Eduard Gabanski; Erich Peters
Original assignee: Voith Paper Patent GmbH
Current assignee: Voith Patent GmbH
Priority date: 2004-09-23
Filing date: 2005-08-15
Publication date: 2009-10-01
Anticipated expiration: 2025-08-15
Also published as: DE102004046117A1; KR20060050981A; EP1640273A1; NO331386B1; KR101205283B1; AU2005203629A1; RU2005129653A; CN100532207C; ES2287841T3; NO20054266D0; NO20054266L; DE502005000813D1; EP1640273B1; CN1751968A; RU2376221C2; ATE364013T1

Abstract

In a winding device for removing cut binding material (1) (especially metal bands) from bales, comprising guide(s) for the material, a receiver (2) with a winding surface (4) and a receiving slit (3) for gripping the material (the receiver being rotatable relative to the guides) and a device for axially moving the wound product from the receiver, the winding surface has a polygonal (preferably square) cross-section, the receiver is enclosed by two spaced press parts (5, 6) movable inwards towards the receiver and the inner surface (7) of the press parts is geometrically similar or identical to part of the winding surface.

Description

1 AUSTRALIA Patents Act 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT Name of Applicant: Voith Paper Patent GmbH Address for Service: CULLEN & CO. Level 26 239 George Street Brisbane Qld 4000 Invention Title: Winding Device for Removing Cut Binding Material The following statement is a full description of the invention, including the best method of performing it, known to us: 2 The present invention relates to a winding device suited for removing cut binding material such as metal tapes from bales. Devices of this type are used e.g. in the paper industry. The raw material for paper making, such as cellulose or waste paper, is often delivered in pressed bales, held together by binding 5 material, in particular wires or tapes. Before the raw materials are processed into an aqueous suspension e.g. in a pulper, such wires or tapes generally have to be removed. This can also take place manually, though this is risky and expensive. For this reason devices of the type mentioned here have been developed, by means of which the removal of cut wires and tapes can take place automatically. Winding devices, which can be used for such purposes, are known 10 e.g. from DE 28 21 336 C2. When the inventive winding head is used in a bale stripping device the winding device is preferably arranged such that it can engage on the side of the bale opposite the cutting mechanism. Before or after the tape or the wire on the opposite side is cut through, either the takeup part is run against the bale or the bale is run against the takeup part such that its frontal 15 working end rests directly on the binding material to be removed. When the takeup part is set in rotation the tape or the wire is wound up, so that it is taken off the bales and forms a small solid coil which is easy to gather and remove. The takeup part preferably sits on a shaft of a motor, preferably an electrodrive motor with a slow initial speed. But a hydromotor can also be provided by way of example. The motor is 20 preferably designed so that it can be adjusted in such a way that its shaft assumes a specific position relative to the binding material to be taken up when idle. The advantage here is that the latter is taken up more securely and more easily from the slots of the takeup part. In order to press bales together for transport purposes, in many cases round steel wires with e.g. a 4 mm diameter are used. These can be coiled using known winding devices into wire rolls, so 25 called coils, and removed axially from the takeup part. In other cases however, in which steel tapes are used as binding material, it can eventuate that the tape winding get jammed in the winding device such that they cannot be reliably removed. Such steel tapes have e.g. a thickness of 2 mm and are made of steel, stainless steel or some other resilient elastic material. They have the tendency, after being wound up, therefore when the torsional moment applied by the takeup 30 part for winding is absent, to spring back strongly elastically, therefore to come undone again.

3 This can lead to the fact that after it is relieved the binding material expands outwards strongly, resulting in jamming in the winding device. In yet other cases the binding material comprises not metal, but plastic. Such binding material is in most cases used as tape, e.g. having a width between 10 and 20 mm, and a thickness of ca. 1 5 mm. Plastic tapes can be made e.g. braided or produced by an extruder. Also, binding material made of plastic can have the tendency to come undone after being coiled up to the extent that unwinding of the bale can be impaired. The object of the invention therefore is to provide a novel winding device, enabling not only wires, but also tapes, used for tying up bales, to be securely rolled up and then later removed 10 from the winding device. In special designs problematic plastic tapes should also be able to be removed. In accordance with the invention, there is provided a winding device, suited for removing cut binding material (1), in particular metal tapes, from bales, comprising at least one guide part for the binding material, a takeup part (2, 2', 2" ), which has in its winding area a winding surface 15 (4, 4') and a takeup slot (3) for gripping the binding material (1) and which can be rotated relative to the guide part, and a mechanism for axial removal of the coiled binding material from the takeup part, characterised in that the winding surface (4, 4") of the takeup part (2) substantially has the cross-sectional form of a polygon, preferably a square, and in that the takeup part (2, 2", 2") is surrounded by at least two press parts (5, 5", 5", 6, 6', 6") at a distance, 20 which can be moved to the takeup part (2, 2', 2") and away from it, and in that the inner surface (7, 7") of the press part (5, 5", 5", 6, 6", 6") is geometrically similar or identical to a part of the winding surface (4, 4", 4") of the takeup part (2, 2", 2"). In the inventive device the outer surface of the takeup part and the inner contour of the press part cooperate in a particularly advantageous manner. Due to the angular form the coiled 25 binding material can be deformed particularly markedly and thus plastically at the corner points. A winding of tape or wire processed in this way no longer has the tendency to expand interferingly once it is untensed. By use of this simple measure it is therefore possible also when using binding materials, which have e.g. a tendency to unravel after being coiled up, as occurs with spring steel or certain plastics, to coil them up without particular difficulty, and 30 then to dispose of them.

4 A particular advantage of the inventive object is also that there is no need to differentiate between tapes and wires, since this is a universally utilisable device. It is therefore not necessary to constantly check the incoming raw material bales for the type of binding material on them. It is also understood in the case of soft binding material, which does not have a 5 tendency to come undone after being coiled up, that binding material can still be removed problem-free using the inventive winding device. The invention and its advantages will now be explained by means of schematic diagrams, in which: Figures la to d illustrate the principle and functioning of the inventive object curing winding; 10 Figures 2a to c illustrate the principle and functioning of the inventive object as the tape winding is being cut offt Figure 3 illustrates a variant with acute corner angles, Figure 4 illustrates a variant of the form shown in Figure 3 with special means for expanding the binding material; and 15 Figure 5 illustrates a further variant with means for heating. Figures 1a to Id illustrate parts of the inventive winding device and four significant phases of its operation. The takeup part 2 is arranged with the winding surface 4 between two press parts 5 and 6. Not shown here is the binding material being cut on the bale, loosened and removed. The binding material is then brought to the right positions on the winding device. In the state 20 shown in Figure 1 a the binding material 1 is already inserted into the takeup slot 3 of the takeup part 2. In this operating mode both press parts 5 and 6 are located at a greater distance from the takeup part 2 and at the same time can optionally take on the function of a guide part for binding material to be wound up. The inner surfaces 7 of the press parts 5 and 6 in each case form a 25 stringer angle P = 90*, open to the takeup part 2. The combing line 8 of the angle runs parallel to the axis of rotation 9. The cross-section laid vertically to the axis of rotation 9 on the winding surface 4 by the takeup part 2 here has the shape of a square with slightly rounded corners. The corner angle a here is 360*, divided by 4 equals 90'. The roundings have e.g. a radius of curvature of maximum 10 mm, preferably maximum 1 mm.

5 Depending chiefly on tape material to be processes a radius of curvature of ca. 0.1 mm can also be particularly favourable. Figure 1 b shows the tape winding 10 formed by rotating the takeup part 2. In the subsequent pressing procedure according to Figure 1 c both press parts 5 and 6 are moved in the direction of the takeup part 2 and pressed, for which purpose e.g. hydraulic 5 cylinders are used. The tape winding 10 shown in Figure I b is reshaped into a tape winding 10" with a form approaching the winding surface 4 of the takeup part 2. As already explained, plastic deformations in the tape material are caused thereby particularly easily. After the press parts 5 and 6 are moved apart the deformed tape winding can expand and is pushed axially down by the takeup part as a relieved tape winding 10". An ejector 11 axial mobile in the 10 takeup part 2 serves this purpose, as shown in Figure 2. In Figure 1 a the angular setting of the takeup part 2 is such that the tape material I can reach the area of the takeup part past the press parts 5 and 6. In Figure 1 c on the other hand the takeup part 2 is rotated in such a way that the winding surface 4 and the inner surfaces 7 of the press parts 5 and 6 approximately correspond. 15 Figures 2 a to 2 c show an exemplary embodiment for the inventive winding head in three different functions, whereby the constructive illustrating of the details is omitted. The winding head arranged here horizontally with a rotatable takeup part 2 (axis of rotation 9) is provided in its range of angle with the winding surface 4. The takeup part is shown partially cut, so that the ejector 11 resting at its centre and the associated ejection rod 12 are visible. Situated in the 20 range of angle is the open-ended takeup slot 3, which serves to grip the binding material, not illustrated here. An upper press part 5 and a lower press part 6 are positioned at a distance from the winding surface 4, which is at least big enough for the formed tape winding 10 to pass into the cavity. It can be set to maximum during the entire winding procedure to make room for the winding at the end of the procedure, or also can be constantly matched to the growing winding 25 and thereby satisfy a tape guide function. As Figure 2 b shows, when both the press parts are pressed together in the direction of the takeup part 2 the tape winding with the already mentioned advantages is reshaped. After both press parts 5 and 6 are again separated from one another the pressed tape winding comes free, expands slightly and can be removed axially from the device as a relieved tape winding 10" by 30 means of the ejector 11. For this to take place the ejection rod 12 is pushed in the direction of the work end of the takeup part.

6 Figure 3 shows an embodiment of the inventive object favoured under certain conditions. Here, in a modification of the example of Figure 1, the corner angle a' of the takeup part 2 is less than it corresponds to the value 3600 by the number of corners. In the case illustrated here it is not 90 but 450, whereby other values are also possible, in particular between 450 and 90*, on 5 account of binding material-specific requisites. The press parts 5" and 6" are accordingly matched to this contour also, therefore they are geometrically similar or identical. In this particular case the stringer angle 0' has a value, which is above that of the corner angle a' by 2'. Such an embodiment is particularly suitable for binding material made of plastic, since the angle generated during the winding procedure is more acute than e.g. 90* (in a quadrilateral), 10 by which the tendency of the binding material to come further undone is reduced even more still. Especially if the inventive winding device is to be used for plastic, heating can improve its functioning even further, as is illustrated in an example in Figure 4. This heating can preferably be performed by electrical heating wires 13 in the press parts 5" or respectively 6". However, it 15 is also possible to arrange heating wires 14 in the takeup part 2, 2' either in addition or exclusively. Heating of the tape material can also be generated by radiation or by friction, e.g. between the tape and the press parts, if the tape winding is made to rotate with press parts lightly pressed together. The tape should be brought to a temperature which is above the maceration point of the plastic at least at the kinks 15, and at most between 80'C and 120*C. 20 Heating the winding device can also be carried out in embodiments, as illustrated in Figure 1. The beneficial configuration complies with requirements, whereby it can be vitally important to construct a universally utilisable winding device, i.e. a winding device suitable both for metal and for plastic tapes. As already mentioned, it is very much easier in operation if the same winding device can also be used in different batches without alteration. If, for example, the 25 winding device illustrated in Figure 5 is provided with heating in the press parts and/or in the takeup part, it is to be expected that it can process all binding materials without problem. The arrangement of the heating wires or the like can be such that the highest temperature is generated right on the kinks 15. The term "comprise" and variants of the term such as "comprises" or "comprising" are used 30 herein to denote the inclusion of a stated integer or stated integers but not to exclude any other integer or any other integers, unless in the context or usage an exclusive interpretation of the term is required.

7 Any reference to publications cited in this specification is not an admission that the disclosures constitute common general knowledge in Australia.

Claims

1. A winding device, suited for removing cut binding material (1), in particular metal tapes, from bales, comprising at least one guide part for the binding material, a takeup part (2, 2', 2" ), which has in its winding area a winding surface (4, 4') and a takeup slot (3) for 5 gripping the binding material (1) and which can be rotated relative to the guide part, and a mechanism for axial removal of the coiled binding material from the takeup part, characterised in that the winding surface (4, 4") of the takeup part (2) substantially has the cross-sectional form of a polygon, preferably a square, and in that the takeup part (2, 2", 2") is surrounded by at least two press parts (5, 5", 5", 6, 6', 6") at a distance, which can be 10 moved to the takeup part (2, 2', 2") and away from it, and in that the inner surface (7, 7") of the press part (5, 5", 5", 6, 6", 6") is geometrically similar or identical to a part of the winding surface (4, 4", 4") of the takeup part (2, 2", 2").

2. The winding device as claimed in claim 1, characterised in that the inner surface (7, 7") of the press part (5,5", 5", 6, 6", 6") is an angular surface with two legs facing the takeup 15 part, whereof the combing line (8) is parallel to the axis of rotation (9) of the takeup part (2, 2", 2").

3. The winding device as claimed in claim 1 or claim 2, characterised in that the polygon determining the winding surface (4, 4', 4") of the takeup part (2, 2', 2") is equilateral.

4. The winding device as claimed in any one of the preceding claims, characterised in that 20 the stringer angle P, P' of the winding surfaces (4, 4', 4") corresponds to the corner angles (a, a') of the polygon with a tolerance of± 100.

5. The winding device as claimed in any one of the preceding claims, characterised in that the polygon forming the cross-sectional form of the winding surface (4, 4') is rounded at the ends with a radius of curvature of maximum 10 mm, preferably maximum 1 mm. 25

6. The winding device as claimed in claim 5, characterised in that the radius of curvature is ca. 0.1 mm.

7. The winding device as claimed in any one of the preceding claims, characterised in that the number of corners of the polygon is not greater than 8, preferably not greater than 6. 9

8. The winding device as claimed in Claim 7, characterised in that the number of corners of the polygon equals 4.

9. The winding device as claimed in claim 7 or claim 8, characterised in that the corner angle (a) of the polygon corresponds to the value 3600 divided by the number of corners, 5

10. The winding device as claimed in claim 7 or claim 8, characterised in that the corner angles (a') of the polygon are smaller than the value 360' divided by the number of corners, in particular approximately half as large.

11. The winding device as claimed in any one of the preceding claims, characterised in that the axis of rotation (9) of the takeup part during operation is horizontal with a maximum 10 deviation of -15* to +150.

12. The winding device as claimed in any one of the preceding claims, characterised in that the takeup part (2, 2', 2") can be driven rotatably in both directions.

13. The winding device as claimed in any one of the preceding claims, characterised in that the press parts (5, 5', 5', 6, 6', 6") can be moved only to the takeup part (2, 2") and 15 moved away from it.

14. The winding device as claimed in claim 13, characterised in that hydraulic cylinders serve to move the press parts (5, 5', 5", 6, 6', 6").

15. The winding device as claimed in any one of the preceding claims, characterised in that there are exactly two press parts (5, 5', 5", 6, 6', 6") in a winding device. 20

16. The winding device as claimed in any one of the preceding claims, characterised in that it has automatic sequential control for moving takeup part (2, 2', 2") and press parts (5, 5', 5", 6, 6', 6").

17. The winding device as claimed in any one of the preceding claims, characterised in that means for heating the binding material are present. 25

18. The winding device as claimed in claim 17, characterised in that at least one press part (5", 6") can be heated. 10

19. The winding device as claimed in claim 17 or claim 18, characterised in that the winding surface (4") of the takeup part (2") can be heated.

20. The winding device as claimed in claim 18 or claim 19, characterised in that heating is provided electrically. 5

21. The winding device as claimed in claim 18 or claim 19, characterised in that heating takes place by radiation.

22. The winding device as claimed in any one of claims 17 to 21, characterised in that means for heating are used such that the highest temperature can be reached at the kinks (15).

23. Use of the winding device as claimed in any one of the preceding claims for removal of 10 tapes of waste paper or cellulose bales in cooperation with a device for cutting off tapes.

24. A winding device, substantially as hereinbefore described with reference to any one of the drawings.

25. Use of the winding device as claimed in claim 24 for removal of tapes of waste paper or cellulose bales in cooperation with a device for cutting off tapes. 15 Voith Paper Patent GmbH By their patent attorneys CULLEN & CO. Date: 15 August 2005