EP1356904B1 - Method and arrangement for cutting a moving web - Google Patents
Method and arrangement for cutting a moving web Download PDFInfo
- Publication number
- EP1356904B1 EP1356904B1 EP03396035A EP03396035A EP1356904B1 EP 1356904 B1 EP1356904 B1 EP 1356904B1 EP 03396035 A EP03396035 A EP 03396035A EP 03396035 A EP03396035 A EP 03396035A EP 1356904 B1 EP1356904 B1 EP 1356904B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting
- web
- mineral wool
- bridges
- bridge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Revoked
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
- B26D1/60—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is mounted on a movable carriage
Definitions
- the present invention relates to a method and an arrangement for cross-cutting a moving web.
- the present invention relates particularly to the cross-cutting of a continuous web of mineral wool in the making of mineral wool.
- Mineral wool e.g. rock wool
- suitable mineral-containing raw materials such as diabase, limestone and slag
- the obtained silicate-containing mineral melt is discharged from the melting furnace in the form of a melt jet to a fiberising apparatus, such as a spinning machine, in which the melt is formed into mineral fibres.
- a binder may be applied on the formed mineral fibres, either during the fibre formation or after it.
- the formed mineral fibres are collected as a fibre mat, which can be processed in several different manners, for instance by oscillating, curing and compressing.
- the processed fibre mat moves forward in the process, in the form of a continuous web.
- the finished fibre mat i.e. the mineral wool web
- This provides mineral wool slabs having a desired width and length.
- the cut mineral wool slabs are weighed in order to control their surface weight, and the accepted slabs are then transported to a packing machine.
- the cutting of the mineral wool web is an important step in the process. An aim is to minimise material losses in the form of falsely cut products and amount of reject generated in the cutting.
- the patent application WO 94/27793 presents a method and a cutting device for cutting a moving mineral wool web in the cross direction of the web.
- the cutting device comprises a bridge suspended transversely above the mineral wool web, and a driving apparatus arranged in connection with the bridge.
- the driving apparatus transports the cutting device in the web's direction of motion during the cutting, so that the motion of the bridge follows the velocity of the mineral wool web, and a perpendicular cut is obtained across the whole width of the wool web.
- the cutting device is returned to its initial position in order to make the next cut.
- the amount of produced mineral fibres per time unit has increased in the making of mineral wool. Then the collecting velocity and thereby also the velocity of the web has been increased in the manufacturing process, in order to keep the surface weight at a reasonably low level despite this fact, and in order to keep the collected primary mats thin.
- the web velocities have increased substantially, from about 18 m/min up to 25 m/min. It is estimated that the web speeds will rise above 30 m/min in the future.
- mineral wool can be used for many purposes. It is used amongst others as insulation material in house building, as acoustic panels, and for other insulation purposes. Among other things the purpose of use and the wool quality of the mineral wool slabs determine their size, i.e. their width and length, and their density. A production line will produce mineral wool slabs of different qualities and for different purpose of use. Therefore, the length of the slabs may vary considerably from one product to the next, for instance between 0.4 m and 4 m.
- the increased web speeds have caused problems in the cross cutting of the mineral wool web, particularly in the cutting of short mineral wool slabs.
- the driving apparatus of the cutting device has a certain maximum power, which cannot be exceeded, i.e. the bridge with the cutting device has a certain maximum speed, with which it can be transported in the direction of the web during the cutting operation.
- the speed of the web cannot exceed this maximum speed, because the speed of the cutting device should follow the speed of the wool web.
- the cross-cutting of the mineral wool web has become a bottleneck in the process of making mineral wool.
- the speed of the wool web must be reduced before the cutting stage of the process.
- the driving apparatus does not have time to move the bridge with the cutting device to its initial position before the next cutting should be performed.
- an object of this invention is to provide a method and an arrangement in the making of mineral wool, where the above-mentioned disadvantages have been minimised.
- An object is also to provide a method and an arrangement for cutting, which allows the web line speed to be increased in the making of mineral wool.
- a further object of this invention is to provide a method and an arrangement which makes it possible to cut the mineral wool web in the cross direction at short cutting intervals.
- a typical method according to the present invention comprises the following steps:
- a typical arrangement according to the present invention comprises:
- the invention makes it possible to keep the speed of the moving mineral wool web high, also when cutting relatively short mineral wool slabs.
- the present invention enables an improved control of the length of the cutting interval, i.e. the length of the mineral wool slabs.
- a typical cutting device comprises a rotating cutting blade arranged in a carriage means, which can be used as a first and a second cutting device in the present invention.
- the cutting blades in use have usually thin rotating blades, which are made of a hard metal with a thickness of 2 to 5 mm, preferably 2.5 to 3 mm.
- the carriage means for the cutting blades can move back and forth on their respective bridges, which extend across the mineral wool web.
- the bridges are arranged on rails or corresponding guiding means, which are fixed on each side of the mineral wool web, so that the bridges can move back and forth in the web direction during the cutting.
- a measuring unit connected to measuring means measures the speed of the mineral wool web.
- the measuring unit is also connected to the driving devices of the bridges, which devices move the bridges in the web's direction of motion with a speed, which is adapted to the speed of the web during the cutting.
- the bridges will thus accelerate to a speed, which substantially equals the speed of the web during the cutting.
- a second cutting device is arranged on a second bridge next to the first bridge with the first cutting device, at a distance from the first bridge.
- the distance between the bridges, on which the cutting devices are arranged, will be controlled by an electronic control system.
- the bridges are equipped with position sensors, such as pulse encoders, which are connected to the control system.
- the desired distance between the bridges i.e. the desired distance between the cutting blades and the length of the mineral wool slabs, is entered to the system, and then the driving devices move the bridges to the desired distance from each other.
- the electronic control system comprising a positions sensor, controls the distance between the bridges and/or the distance to a predetermined reference point, so that the distance between the bridges is kept constant during the cutting.
- Different types of pulse encoders or other corresponding transducers can be used as position sensors.
- the position sensors can be integrated in the driving devices of the bridges, such as servomotors.
- each of the first and the second bridges are provided with their own driving devices in order to have an independent control of the bridges.
- the electronic control system for adjusting the distance between the bridges makes it also easy to adjust the cutting intervals according to the production requirements. If it is desired to change the cutting interval, then the distance between the bridges can easily be changed by entering a new cutting distance value to the control system.
- the second bridge with the second cutting device can be simply disconnected, when required, and the cutting can be made in a traditional manner. Therefore the present invention provides an improved flexibility in the cutting of mineral wool webs.
- the invention enables a cutting of slabs with different lengths without any major changes in the construction of the process equipment.
- the electronic control system can also be connected to the control circuits of the rest of the production process, in some commonly known way. This makes it possible to change the cutting length from a centralised process control room.
- the first and second bridges with their cutting devices are advantageously arranged in a common frame, which extends across the mineral wool web.
- the cutting devices are located on opposite sides of the mineral wool web in their starting position, i.e. before the cutting procedure.
- the second cutting device has its starting position on the opposite side of the mineral wool web, as seen from the starting position of the first cutting device.
- a starting position is considered to be that position where the cutting device, i.e. the cutting blade, is located at the edge of the mineral wool web.
- the cutting devices move in opposite directions across the mineral wool web during the cutting. This prevents the mineral wool web from moving sideways during the cutting, and this provides a better right-angled cutting of the web. As the first and second cutting devices on each bridge perform the cutting from opposite directions, this will prevent a twisting of the mineral wool web when the cutting blades meet and cut through the web.
- the present invention it is possible to arrange several cutting devices next to each other on their respective bridges.
- the number of cutting devices can be for instance three or four. This enables yet higher web speeds, or a cutting of even shorter mineral wool slabs.
- Figure 1 shows schematically an arrangement 15 for cutting a mineral wool web according to the present invention.
- the arrangement 15 is seen against the motion direction of the mineral wool web 2, and figure 1 shows only one of the cutting blades 3 arranged next to each other.
- the cutting blade 3 is arranged in a carriage means 4, which is driven by a motor 5.
- the carriage means 4 moves back and forth on a bridge 6, which extends across the mineral wool web 2.
- the bridge 6 is arranged in guiding means 7, 7', which are fastened on each side of the mineral wool web 2, so that the bridge 6 can move back and forth in the web's 2 direction of motion during the cutting.
- the bridge 6 is driven with a servomotor 8.
- Figure 1 shows also the power transmitting cardan shafts 9, 9' and a gearbox 10 for the bridge 6.
- FIG 2 shows schematically, as seen from the side, i.e. perpendicular to the motion direction of the mineral wool web 2, an arrangement 15 according to the present invention, which comprises a first cutting device 1 and a second cutting device 1'.
- the cutting devices 1, 1' are arranged adjacent each other.
- Figure 2 shows the motion direction of the mineral wool web 2 with an arrow B.
- Both the first and the second cutting devices 1, 1' comprise a rotating cutting blade 3, 3'.
- Each cutting blade 3, 3' is arranged in its carriage 4, 4', which travel in a guiding means 11, 11' back and forth on a bridge 6, 6', which extends across the moving mineral wool web 2.
- Each bridge 6, 6' is arranged in its carriage 17, 17', which travel in a guiding means 7 for bridges.
- a corresponding guiding means for bridges is arranged on the other side of the mineral wool web, but this is not shown in figure 2. During cutting the bridges travel in the motion direction B of the mineral wool web.
- Figure 2 shows also safety switches 12, 12', 12", 12"', which are arranged in a support frame 13 being attached to the frame 16 via suspension beams 14, 14', 14", 14"'.
- the safety switches 12, 12', 12", 12''' limit the motion of the cutting device 3, 3' sideways across the mineral wool mat in case any faults in the rest of the control system occur.
- Figure 2 also shows the supporting frames 19, 19' of the guiding means 11, 11'.
- Figure 3 shows schematically an arrangement 15 according to the present invention as seen in a top view.
- a cross-section A in the centre of the figure is shown in order to illustrate the mutual positions of the cutting blades 3, 3' at a moment during the cutting. If both cutting blades 3, 3' are located on the same side of the mineral wool web 2 at the beginning of the cutting, then the distance L between the blades 3, 3' is kept constant during the whole cutting, and this distance L is then the desired length of the cutting. If the blades 3, 3' are located on opposite sides of the mineral wool web at the beginning of the cutting, then the desired cutting length equals the distance L between the cutting blades 3, 3' at that moment when they pass each other during the cutting process.
- the cutting blades 3, 3' are arranged in carriages, which are not shown in the figure. Both cutting blades 3, 3' are driven by their own motor 5, 5'.
- the carriages are arranged on their respective bridges 6, 6', which extend across the mineral wool web 2.
- the bridges 6, 6' are arranged in guiding means 7, 7', which are fastened on each sides of the mineral wool web 2, so that the bridges 6, 6' can travel back and forth in the motion direction of the web 2 during the cutting.
- Each bridge 6, 6' is driven by its own servomotor 8, 8'.
- Figure 3 shows also the power transmitting cardan shafts 9, 9', 9", 9''' and gear boxes 10, 10' for the bridges 6, 6'.
- Both bridges 6, 6' are arranged in a common frame 16, which extends across the mineral wool web 2.
- the line speed of the web can be essentially increased in the production of mineral wool by using the present invention in the cross-cutting of the mineral wool web, as the invention allows an increased number of cuttings per time unit. In total this means that the cross-cutting of the mineral wool web, which previously was a bottleneck in the production process of mineral wool, now can be made with the same speed as the other process stages before the cutting.
- the present invention allows cutting the mineral wool web in the cross direction at short cutting intervals, which increases the variation possibilities in the mineral wool production. You can cut shorter products and easily change the cutting length, when desired, as the cutting length can be simply determined by the electronic control system.
- the electronic control system is also easily combined with other control and regulating systems, which facilitates a total control and regulation of the mineral wool production.
- the present invention allows reducing the number of falsely cut mineral wool slabs.
- the invention entails that the cutting can be made with a substantially higher accuracy using an electronic control system.
- the cutting can be made more perpendicular than with previous cutting methods and arrangements. It is a fact that by using only one blade the blade will push the mineral wool slab sideways, and then the cut tends to be oblique. This problem does not occur in the embodiment of the present invention using two blades, and this provides a mineral wool slab, which is cut at right angles.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
- Replacement Of Web Rolls (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200330255T SI1356904T1 (sl) | 2002-04-26 | 2003-04-23 | Postopek in razporeditev rezanja gibljivega traku |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20020802A FI115705B (sv) | 2002-04-26 | 2002-04-26 | Förfarande och anordning för skärning av en rörlig bana |
FI20020802 | 2002-04-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1356904A1 EP1356904A1 (en) | 2003-10-29 |
EP1356904B1 true EP1356904B1 (en) | 2006-02-15 |
Family
ID=8563841
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03396035A Revoked EP1356904B1 (en) | 2002-04-26 | 2003-04-23 | Method and arrangement for cutting a moving web |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1356904B1 (sv) |
AT (1) | ATE317748T1 (sv) |
DE (1) | DE60303589T2 (sv) |
DK (1) | DK1356904T3 (sv) |
ES (1) | ES2256701T3 (sv) |
FI (1) | FI115705B (sv) |
PT (1) | PT1356904E (sv) |
SI (1) | SI1356904T1 (sv) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2550634C1 (ru) * | 2013-01-16 | 2015-05-10 | Парок Ой Аб | Способ производства листов из минеральной шерсти |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE519553T1 (de) * | 2007-06-27 | 2011-08-15 | Sica Spa | Methode zum ablängen von kontinuierlich extrudierten rohren in vorbestimmte längen. |
ITRN20070034A1 (it) | 2007-06-27 | 2008-12-28 | Sica Spa | Macchina e metodo di taglio di un tubo estruso in continuo in spezzoni di minore e predeterminata lunghezza. |
DE102014218977A1 (de) * | 2014-09-22 | 2016-03-24 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren für den Zuschnitt von Halbzeugstreifen und Schneidvorrichtung für den Zuschnitt von Halbzeugstreifen |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2605841A (en) * | 1949-06-06 | 1952-08-05 | Earl R Overman | Drive for flying knives |
DE1145980B (de) * | 1961-07-14 | 1963-03-21 | Gerrit Jan Van Elten | Vorrichtung zum Zerschneiden eines auf Formplatten fortlaufend bewegten Holzwolle-Bindemittel-Stranges in Abschnitte gleicher Laenge |
CH688308A5 (it) * | 1993-03-12 | 1997-07-31 | Soremartec Sa | Dispositivo di sincronizzazione, particolarmente per impianti per la fabbricazione ed il confezionamento di prodotti alimentari. |
AU6652694A (en) * | 1993-05-24 | 1994-12-20 | Paroc Oy Ab | Method and apparatus for cutting a mineral wool web and arrangement by such a cutting apparatus |
IT1316935B1 (it) * | 2000-10-05 | 2003-05-13 | Kemac Srl | Taglierina per estrusi. |
-
2002
- 2002-04-26 FI FI20020802A patent/FI115705B/sv active IP Right Grant
-
2003
- 2003-04-23 DE DE60303589T patent/DE60303589T2/de not_active Revoked
- 2003-04-23 PT PT03396035T patent/PT1356904E/pt unknown
- 2003-04-23 EP EP03396035A patent/EP1356904B1/en not_active Revoked
- 2003-04-23 SI SI200330255T patent/SI1356904T1/sl unknown
- 2003-04-23 ES ES03396035T patent/ES2256701T3/es not_active Expired - Lifetime
- 2003-04-23 AT AT03396035T patent/ATE317748T1/de not_active IP Right Cessation
- 2003-04-23 DK DK03396035T patent/DK1356904T3/da active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2550634C1 (ru) * | 2013-01-16 | 2015-05-10 | Парок Ой Аб | Способ производства листов из минеральной шерсти |
Also Published As
Publication number | Publication date |
---|---|
FI115705B (sv) | 2005-06-30 |
ATE317748T1 (de) | 2006-03-15 |
FI20020802A (sv) | 2003-10-27 |
SI1356904T1 (sl) | 2006-08-31 |
ES2256701T3 (es) | 2006-07-16 |
PT1356904E (pt) | 2006-05-31 |
DK1356904T3 (da) | 2006-06-19 |
DE60303589D1 (de) | 2006-04-20 |
FI20020802A0 (sv) | 2002-04-26 |
EP1356904A1 (en) | 2003-10-29 |
DE60303589T2 (de) | 2006-12-14 |
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