Method and an apparatus for horizontally splitting a mineral wool web

1. A method for horizontally splitting a cured mineral wool web, comprising the steps of:

providing a cured mineral wool web on a conveyor, said conveyor having a first direction of travel;

longitudinally dividing the cured mineral wool web into at least two sub-webs; and then

lifting a sub-web by lifting a section of the conveyor, and

horizontally cutting the lifted sub-web.

2. The method according to claim 1 , wherein individually lifting each of the sub-webs is subsequently performed in a downstream direction of the travel so that the lifted sections of each of the sub-webs occur at different locations on the conveyor direction of travel so that the horizontally cuttings of the sub-webs take place separately.

3. The method according to claim 1 , wherein the horizontally cutting is performed by a band saw having an endless saw band with a horizontal lower active cutting path and an upper return path, said active cutting path and said upper return path both being substantially perpendicular to the first direction of travel.

4. The method according to claim 1 , wherein simultaneous cutting is performed on the at least two sub-webs.

5. The method according to claim 1 , wherein the cured mineral wool web is divided into two sub-webs.

6. The method according to claim 5 , wherein the band saws run in opposite directions, such that the active paths of each of the band saws run towards an exterior side edge of the cured mineral wool web.

7. An apparatus for horizontally splitting a cured mineral wool web, comprising:

a conveyor having a first direction of travel adapted for receiving and advancing a cured mineral wool web in said first direction;

at least one dividing device for longitudinally dividing the cured mineral wool web into at least two sub-webs as said cured mineral wool web is advanced passed said at least one dividing device;

at least one lifting mechanism provided downstream of the dividing device so that a section of the conveyor is adapted for lifting a sub-web; and

at least one horizontal cutting device provided for horizontally cutting the sub-web whilst lifted in said conveyor section.

8. The apparatus according to claim 7 , wherein a lifting mechanism is provided for each of the sub-webs subsequently in the downstream direction of the travel, so that the lifted sections of each of the sub-webs occur at different locations on the conveyor direction of travel, so that the horizontally cuttings of the sub-webs take place separately.

9. The apparatus according to claim 7 , wherein the conveyor is a roller conveyor.

10. The apparatus according to claim 9 , wherein the roller conveyor is provided with sub-lines of rollers corresponding to each sub-web with the associated lifting mechanism adapted for being capable of lifting a sub-web at a section.

11. The apparatus according to claim 7 , wherein the horizontal cutting device is provided above each lifting section adapted for horizontally cutting each of the sub-webs while lifted in the individual lifting section.

12. The apparatus according to claim 7 , wherein the at least one horizontal cutting device comprises a band saw having an endless saw band with a horizontal lower active cutting path and an upper return path, said active cutting path and said upper return path both being substantially perpendicular to the first direction of travel.

13. The apparatus according to claim 7 , wherein there is provided one dividing device for longitudinally dividing the cured mineral wool web into two sub-webs.

14. The apparatus according to claim 13 , wherein the band saws are arranged to run in opposite directions, such that the active paths of each of the band saws run towards an exterior side edge of the initial web.