EP2422944B1 - Method for sawing at least one panel - Google Patents

Description

The present invention relates to a method according to the preamble of claim 1.

Such a method is the EP 2 193 894 A1 refer to.

The division of a plate or even a plate stack by means of a panel splitter is a strictly sequential process. In a first dividing cycle or in the first method section, plate strips are produced from the plate. In this case, so-called trimming cuts can also be carried out at the edge of the original plate before or during the first process section. In a further division cycle or in the second process section, these plate strips are then broken down into partial plates. Also in this second process section, it is possible to make trimming cuts at the edge of the original plate. At the end of the first part of the process are completely separate plate strips before, at the end of the second part of the process, these are sawn into completely separate sub-plates. The known in the art Method works without any problems, as long as the part plates to be cut in the result in at least one edge length coincide with a width of the plate strips zuzusägenden in the first process section. It becomes problematic if the partial plates which are to be sawn out of a plate strip do not coincide, at least in one edge length. In the prior art so-called third cuts are performed in this case to saw out of an intermediate format the final desired final format of the sub-plate. These third cuts have the problem that the intermediate formats must be re-inserted after the second process section in the panel sizing to perform the third section for the production of the sub-plate with desired dimensions. This is both time consuming and labor intensive by hand.

From the AT 361 700 For example, a panel dividing installation is known with which a generic method for sawing at least one panel can be carried out. The above-mentioned problem with the third cuts is already in the embodiment gem. Fig. 4 to master the problem with the third cuts, is in the AT 361 700 proposed to use a total of four saw blades at different workstations of the panel splitter. The in the AT 361 700 shown solution of the third-cut problem requires a very complex and therefore cost-intensive design of the Plattenaufteilanlage, which pays off only for very large numbers of plates to be sawn.

From the AT 507 591 A1 and the EP 2 193 894 A1 is an alternative approach to the third-cut problem known. Here it is proposed to carry out the third cuts by means of the insert cutting not completely through the plate together with the first cuts in the first stage of the process. Disadvantages of this procedure are the additional waste strips that are formed and the additional steps required for these waste strips. This results in a rather low utilization of the raw plate and a longer production time.

The object of the invention is therefore to further develop a generic method in such a way that it has a panel-dividing system of comparatively simple construction on the one hand feasible and on the other hand but still allows a high production performance when splitting.

This is achieved by a method according to claim 1 according to the invention.

A basic idea of the invention is thus, when dividing the plate or the stack of plates, to process the first and second process sections without considering the third cuts, as is known per se, by first sawing out the plate strips from the raw plate or the raw format by means of the first cuts and then the division into partial plates by means of or the second cuts takes place. Whether only one first or second or several first or second cuts are necessary depends on the pattern to be realized. Both in or before the first stage of the method and in or before the second stage of the method, the per se known trimming cuts can be carried out at the edge of the original plate, if necessary. Gem. The invention, a third method section is now provided. This can be carried out or started subsequently or during the second process section. In this third process section, it is provided to transport at least one of the partial plates or also a plurality of partial plates from the rear transport device of the plate dividing systems back to the or one of the sawing devices in order then to carry out at least a third cut by means of the sawing device so as to saw the partial plate once again and produce the desired final format. A basic idea of the invention is thus that the sawing device or one of the sawing devices used for the first and / or second cuts is also used for the third cuts by mechanically re-locating those sub-plates, where third cuts are required, by means of the return conveyor or one of the sawing devices supplies. The process can be carried out on a wide variety of panel dividing systems. Thus, a panel splitter for performing the method have two different sawing means in the form of the first sawing device for the Erstschnitte and the second sawing device for the second cuts. The third cuts can then be carried out both by the first sawing device and by the second sawing device if the return transport device is designed accordingly. However, methods according to the invention can also be carried out on panel dividing installations which have only a single sawing device. This is possible if, by means of a corresponding return transport device after the first process section, the partial plates for the second process section are optionally returned to the sawing device following a rotation in order then to carry out the second cuts. Accordingly, then gem. the invention by means of the return transport means the sub-plates returned, and then again perform the third cuts with the same sawing. This, of course, only on the part plates, where third cuts must be performed.

Preferred embodiments of the invention provide that the first cut or cuts are sawn with a first sawing device of the plate-splitting installation along a cutting line of the first sawing device and that the second or the second cuts are sawn with a second sawing device of the panel-forming installation along a cutting line of the second sawing device, the cutting lines the sawing means are arranged obliquely or orthogonal to each other. In the case of an orthogonal arrangement of the cutting lines of the two sawing means one then speaks often in the first cuts of longitudinal cuts and in the second cuts of cross-sections or vice versa. However, the cut lines do not necessarily have to be arranged orthogonally, it may just as well be that they are arranged obliquely to one another. The term oblique denotes all those angles which are not orthogonal and not parallel. But it is equally possible that the one or more first cuts are sawn with a first sawing the Plattenaufteilanlage along a cutting line of the first sawing device and that the second cuts or are sawed with a second sawing the Plattenaufteilanlage along a cutting line of the second sawing device, wherein the Cut lines of the sawing arranged parallel to each other are. In this case, conveniently located between the first and the second sawing means a rotating device for rotating the plate strips following the first process section.

Even before performing the third cuts but can not be provided rotating the sub-plate. For this purpose, it is advantageous if the sub-plate is rotated before sawing the third section of a rotating device of the Plattenaufteilanlage, preferably about an imaginary normal axis on a plate plane of the sub-plate imaginary axis. A plate usually has a base and a top surface and side or end faces. The base or top surfaces usually have a much larger area than the front or side surfaces. In this context, plate plane is understood to mean a plane which lies parallel to the base and / or top surface of a plate or partial plate, preferably runs through the base or cover surface.

As already mentioned, third cuts do not generally have to be made on all partial plates, usually only individual partial plates which require a further cut. In this sense, it is provided that only a first subset of the partial plates produced in the second process section discarded, transported back from the rear transport and sawed by the or one of the sawing means by means of at least a third section and at least another subset of generated in the second process section Part plates are transported by a further transport device in another direction of transport or otherwise processed further. In such embodiments of the method according to the invention, the sub-panels, which need not be further sawed by third cuts, are already supplied by the further transport device for further processing, while the required third cuts are performed on the first subset of the sub-panels.

Favorable embodiments of the method further provide that the partial plate is sawn at most by means of a third section. But this does not have to be mandatory be so, it is also conceivable that more than a third section must be performed on a partial plate. In particular, if the sub-plate has to be sawn further only by means of a third cut, it can be provided that at least one of the parts sawed from the sub-plate is removed from a removal device after the third cut without having previously been fed to another of the sawing devices. This is expediently provided, in particular, when the partial plate is fed for carrying out the third cut of a first sawing device, which in the normal transport direction is followed by a second sawing device. The removal devices can then ensure that the parts of the partial plate produced in the course of the third cut are removed from the normal material flow before reaching the second sawing device.

Preferred embodiments of the invention further provide that the third cut or the third cuts are sawn along one or more, preferably linear, third cut lines, the third cut lines, as seen with respect to the plate, being parallel to the first cut line (s) or parallel to or the second cut line (s) is (are) arranged.

• Fig. 1 bis 3 Draufsichten jeweils auf die Deckfläche einer Platte, wobei verschiedene Schnittpläne, wie sie bezüglich der Platte zu sehen sind, eingezeichnet sind.
• Fig. 4 schematisiert eine erste Variante einer Plattenaufteilanlage auf der ein er-findungsgemäßes Verfahren durchgeführt werden kann;
• Fig. 5 eine Prinzipskizze zur Darstellung einer Plattenebene und der darauf normal stehenden Drehachse;
• Fig. 6 bis 8 schematisiert verschiedene weitere Varianten von Plattenaufteilanlagen zur Durchführung erfindungsgemäßer Verfahren.

Further features and details of preferred embodiments of the invention will be explained with reference to the description of the figures. Show it:

• Fig. 1 to 3 Top views respectively on the top surface of a plate, wherein various cutting plans, as they are seen with respect to the plate, are located.
• Fig. 4 schematizes a first variant of a panel-forming installation on which a method according to the invention can be carried out;
• Fig. 5 a schematic diagram illustrating a plate plane and the normal rotation axis thereon;
• Fig. 6 to 8 schematizes various other variants of panel dividing systems for carrying out inventive methods.

In Fig. 1 is a plan view of a top surface of a plate to be sawn shown. There are in the form of a cutting plan the first cutting lines 4, second cutting lines 7 and Third cut lines 14 of the total to be performed on this plate 1 first, second and third cuts as they, as seen with respect to the plate 1, lie. If all these cuts are made in the correct sequence, the plate 1 is divided into the sub-plates 8 and, if necessary, the sub-plates 8 are disassembled into their parts 13. From the order, gem. The invention first carried out the first cuts along the first cut lines 4 in the first process section. In this case, before or in the first process section, as far as necessary, first cuts can also be made as trimming cuts along the marginal first cut lines 4, in order to separate the edge strips 18, which are then generally waste. The plate strips 5 produced by means of the first cuts are then sawn into the partial plates 8 in the second method section by means of the second cuts along the second cut lines 7. In this case, the first and the last second cut also the trimming and thus the separation of edge strips 18 are used.

In the first embodiment, the Erstschnitte serve on the outer Erstschnittlinien 4 as I said the trimming. This can also be omitted in provided with appropriately clean edges running plates 1. Through the first cut along the middle first cut line 4, the plate 1 is sawn into the two plate strips 5. All this happens in the first part of the procedure. Subsequently, the in Fig.1 viewed upper plate strips sawed by means of the second cuts 7 in four sub-plates 8. The same applies to the lower plate strip, but these partial plates 8 have a different format. The second cuts are made along the second cut lines 7 in the second method section. In the third method section is then in the embodiment according to Fig. 1 only a single third section on the sub-plate 8 top left perform. This takes place along the third section line 14 and generates from the partial plate 8, the two parts thirteenth

In Fig. 2 a splitting scheme is shown, in which the plate 1 is first sawed by means of first cuts in three plate strips 5. Subsequently, the division takes place by means of the second cuts in the sub-panels 8, of which then a total of four sub-panels 8, each with a third section along the marked third cutting lines 14 must be sawn. Fig. 3 shows a third exemplary allocation scheme, in which from all three plate strips 5 sub-panels 8 with third cuts along the respective third cutting lines 14 must be further sawn. In the Fig. 1 to 3 are the first, second and third cutting lines 4, 7 and 14, as already stated, seen with respect to the plate 1, as if they were drawn on this. In practice, these first, second and third cutting lines are of course not drawn on the plate 1, as a rule.

In Fig. 4 is a schematic plan view of a first panel divider 2, with the method of the invention can be carried out and z. B. in the Fig. 1 to 3 illustrated sectional plans are feasible. The plates to be sawn are first fed to the panel dividing plant 2 by means of a plate feeder 19 known per se. A per se known feed device 20 then accesses with its known grippers 29 a to be sawn plate 1 or a corresponding plate stack and moves it in the transport direction 22 to the first sawing device 3, with the following after a corresponding orientation to the stops 21 Erstschnitte along the first cut lines 4 are performed. This happens in the first part of the procedure. Subsequently, the plate strips 5 produced thereby are transported by means of the transport device 23 in front of the second sawing device 6. Now, the feed device 24 with its grippers 29, the sub-plates 5 individually or in stacks and supply the second sawing device 6 to perform along the second cut lines 7, the second cuts in the second process section. All this is known per se in the prior art and need not be explained further. In the exemplary embodiment shown, both the first sawing device 3 and the second sawing device 6 are under-counter circular saws, which can each be moved along linear cutting lines 15 and 16 in order to carry out the corresponding cuts. Again, this is known and need not be explained again. Of course, other sawing equipment can be used. It is also not necessary that the cutting lines 15 and 16 are necessarily performed linearly. The orthogonal arrangement of the cutting lines 15 and 16 relative to each other is not absolutely necessary. After sawing the plate strip 5 in the sub-plates 8 in the second process section is now the invention. Seen in the transport direction 22 behind the second sawing device 6 are now individual sub-plates 8, where third cuts must be performed by means of the return conveyor 9 again the second sawing device 6, to be sawed there by means of third cuts along the third cutting lines 14 in the parts 13. In the illustrated embodiment acc. Fig. 4 those sub-plates 8 are separated out by means of the removal device 17 and the first return transport 26 via the return conveyor 9 fed. In the embodiment gem. Fig. 4 is in the return conveyor 9, a rotating device 10 is integrated, with which the sub-plates 8, where third cuts are performed, before feeding to the second sawing 6 z. B. are rotated by 90 °. On the marked first return transport path 26, the selected or discarded partial plates 8 are again fed to the second sawing device 6 in order to carry out the third cuts along the third cutting line 14 there. The other partial plates 8, which do not require any third cuts, can meanwhile be supplied or transported away by the further transport device 12 for further processing. After carrying out the third cuts and the parts 13, which are caused by sawing the partial plates 8, transported away from the further transport device 12. The separation of the final formats produced by sawing also preferably takes place on the further transport device 12.

Fig. 5 schematically shows a plate 1 in a side view of an end face. The plate plane 11, which runs parallel to the upper or through the upper top surface of the plate 1, is shown by dashed lines. Also visible is the axis of rotation 25, which is normal on the plate plane 11, around which the rotator 10, the sub-plate 8 rotates before the third cut is performed. The axis of rotation is shown in the middle, but the central arrangement of the axis of rotation is not absolutely necessary.

In Fig. 6 now an alternative panel-2 is shown, with which an alternative variant of the method according to the invention can be performed. This panel divider 2 corresponds in many details of the panel divider acc. Fig. 4 so that only the differences are discussed here. These are essentially in that the rotary device 10 has been dispensed with. Instead of the rotation, the separated partial plates 8 are now not supplied to the second sawing device 6 but to the first sawing device 3 in order to carry out the third cuts. This eliminates the need for rotation of the sub-plate 8 before performing the third cuts. In order not to have to drive over the section line 16 of the second sawing device 6 after performing the third cuts by means of the first sawing device 3 resulting parts 13 of the sub-plates 6, a removal device 17 is also provided following the first sawing device 3, with which the parts 13 taken and following the arrows, can be moved back into the area behind the second sawing device 6, to then be transported by the further transport device 12. The rest of the procedure in the implementation of the method according to the invention corresponds to the above. Fig. 4 described and will therefore not be explained again. Alternative to the variant gem. Fig. 6 Of course, the separation of the parts 13 behind the first sawing device can be dispensed with. Then these parts 13 are fed over the cutting line 16 of the second sawing device 6 away the further transport device 12. The width of the transport devices 9, 12 and 23 is of course shown here only schematically and must be adapted to the respective requirements in order to be able to transport correspondingly large formats of plates 1, plate strips 5 and part plates 8 and their parts 13. In Fig. 7 a further panel dividing plant 2 is shown with which the method according to the invention can be carried out. Again, only the differences to the previously described embodiments will be discussed. In contrast to these gem. Fig. 7 the third cuts are carried out both by the first sawing device 3 and by the second sawing device 6. There are therefore also two different return transport paths 26 and 27 on the return conveyor 9 possible, which in turn comprises a rotating device 10 in this embodiment. The separation of parts 13 produced by means of third section of a partial plate 8 following the first sawing device 3 is again possible by a corresponding removal device 17 behind the first sawing device 3. Just as well can by means of this sampling device 17 whole plate strips 5 are guided past the second sawing device 6, as shown in dashed lines as removal transport path 28.

Fig. 8 shows in a further embodiment of a panel splitter 2, that for performing the method according to the invention, the cutting lines 15 and 16 of the first and second sawing 3, 6 need not necessarily be arranged obliquely or orthogonal to each other. In the exemplary embodiment shown, the plate strips 5, which are sawn in the first method section by means of the first sawing device 3, are rotated by a rotary device 10 before being fed to the second sawing device 6 for carrying out the second method section. Subsequent to the execution of the second cuts by means of the second sawing device 6, those sub-plates 8 are again taken from the removal device 17 arranged thereon, on which third cuts must be made. These can then be supplied by the return transport device 9 on the first return transport path 26 back to the second sawing device 6 for performing the third cuts. In this case, a rotation by means of the rotary device 10 is conveniently carried out. However, it is just as possible to use the second return transport path 27 in accordance with FIG. Fig. 8 to use. Then, the sub-plates 8, at which third cuts must still be carried out, are rotated by the rotary device 10, which is arranged between the first sawing device 3 and the second sawing device 6. The third cuts are then again carried out by the second sawing device 6. Subsequently, the further transport takes place with the further transport device 12. Alternatively to the in Fig. 8 shown variant of the return transport of the still by means of third section to be sawed sub-plates 8 course, again similar to the previous embodiment gem. Fig. 7 take place before the first sawing device 3.

From which of the sawing devices 3 or 6 the third cuts are performed, it can also be tuned to which of the two sawing devices 3, 6 is less busy in the implementation of the first and second cuts, so that the implementation of the third cuts the rapid implementation of the first and second process sections not or only slightly delayed as possible.

The various exemplary embodiments show that the method according to the invention can be carried out in a wide variety of embodiments and on a wide variety of panel dividing installations 2. The variants shown are of course only examples. It should also be pointed out that the panel dividing systems 2 can be composed entirely of known devices and components. Thus, in the prior art various transport devices are known, which can be used in each case at said locations. The same applies to means, such as the stops 21 for aligning the plates. Feed devices 20 and 24 are in various embodiments in the prior art in use. The same applies to the sawing devices 3 and 6 and also to the rotary device 10 and to the removal device 17.

Legend to the reference numbers:

1

plate

2

Beamsaw

3

first sawing device

4

Erstschnittlinie

5

plate strip

6

second sawing device

7

Second line

8th

subpanel

9

Return transport device

10

rotator

11

board plane

12

Next transport device

13

part

14

Third line

15

intersection

16

intersection

17

removal device

18

edge strips

19

plate supply

20

feeder

21

attack

22

transport direction

23

transport means

24

feeder

25

axis of rotation

26

first return transport route

27

second return transport route

28

Entnahmetransportweg

29

grab

Claims (14)

1. A method for sawing up at least one panel (1) with a panel sizing installation (2), wherein the panel (1) in a first method stage is sawn up into panel strips (5) which are completely severed from each other by a sawing means (3) of the panel sizing installation (2) by means of a first cut or a plurality of first cuts along a first-cut line (4) of the first cut or a plurality of first-cut lines (4) of the first cuts, and the panel strips (5) then in a second method stage are sawn up into partial panels (8) which are completely severed from each other by a sawing means (6) of the panel sizing installation (2) by means of a second cut or a plurality of second cuts along a second-cut line (7) of the second cut or a plurality of second-cut lines (7) of the second cuts, wherein, viewed with respect to the panel (1), the first-cut line(s) (4) is (are) arranged obliquely or orthogonally to the second-cut line (7) or the second-cut lines (7), characterised in that in a third method stage then or during the second method stage at least one of the partial panels (8) is separated out by a removal means (17) and is transported back to the or one of the sawing means (3, 6) by a return-transportation means (9) of the panel sizing installation (2) and is sawn up once again by this sawing means (3, 6) by means of at least one third cut.
2. A method according to Claim 1. characterised in that the partial panel (8) is turned by a turning means (10) before the third cut is sawn.
3. A method according to Claim 1 or 2, characterised in that only a first partial quantity of the partial panels (8) produced in the second method stage is separated out and transported back by the return-transportation means (9) and is sawn up once again by the or one of the sawing means (3, 6) by means of the at least one third cut, and at least one other partial quantity of the partial panels (8) produced in the second method stage is transported further in another direction of transport by an onward-transportation means (12) or otherwise further processed.
4. A method according to one of Claims 1 to 3, characterised in that the partial panel (8) is sawn up at most by means of one third cut.
5. A method according to Claim 4, characterised in that at least one of the parts (13) sawn out of the partial panel (8) after the third cut is removed by a removal means (26) without having been supplied previously to another one of the sawing means (3, 6).
6. A method according to one of Claims 1 to 5, characterised in that the third cut or the third cuts are sawn along one or more third-cut lines (14), the third-cut lines (14), viewed with respect to the panel (1), being arranged parallel to the first-cut line or lines (4) or parallel to the second-cut line or lines (7).
7. A method according to one of Claims 1 to 6, characterised in that the first cut or cuts is or are sawn with a first sawing means (3) of the panel sizing installation (2) along a cutting line (15) of the first sawing means (3), and in that the second cut or cuts is or are sawn with a second sawing means (6) of the panel sizing installation (2) along a cutting line (16) of the second sawing means (6), the cutting lines (15, 16) of the sawing means (3, 6) being arranged obliquely or orthogonally to each other.
8. A method according to one of Claims 1 to 6, characterised in that the first cut or cuts is or are sawn with a first sawing means (3) of the panel sizing installation (2) along a cutting line (15) of the first sawing means (3), and in that the second cut or cuts is or are sawn with a second sawing means (6) of the panel sizing installation (2) along a cutting line (16) of the second sawing means (6), the cutting lines (15, 16) of the sawing means (3, 6) being arranged parallel to each other.
9. A method according to one of Claims 1 to 8, characterised in that it is a method for sawing up a stack of panels.
10. A method according to one of Claims 1 to 9, characterised in that the first method stage is carried out by means of a first sawing means (3) and the second method stage by means of a second sawing means (6).
11. A method according to one of Claims 1 to 9, characterised in that the first method stage and the second method stage are carried out with the same sawing means (3, 6).
12. A method according to one of Claims 1 to 11, characterised in that the first-cut line (4) or the first-cut lines (4) or the second-cut line (7) or the second-cut lines (7) is or are linear.
13. A method according to one of Claims 1 to 12, characterised in that in the case of a plurality of first-cut lines (4) these are parallel to each other and/or in that in the case of a plurality of second-cut lines (7) these are parallel to each other.
14. A method according to one of Claims 1 to 13, characterised in that the partial panel (8) before the sawing of the third cut is turned by a turning means (10) about a notional axis (25) normal to a panel plane (11) of the partial panel (8).

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