Device comprising a furnace and method for the use thereof

Patent metadata

Field	Value
Publication number	US-12195388-B2
Application number	US-202017018163-A
Country	US
Kind code	B2
Filing date	Sep 11, 2020
Priority date	Mar 23, 2018
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

A furnace (2) has at least one furnace chamber (20) delimited by a wall (25); at least one opening (5) is provided in the wall (25). The opening is provided with at least one nozzle (50), configured to generate a sealing air flow. A glass semi-finished product (4) can be introduced into the furnace chamber.

First claim

What is claimed is:

1. Device ( 1 ) comprising:
a furnace ( 2 ) having at least one furnace chamber ( 20 ) adapted to receive a semi-finished glass product ( 4 ),
a wall ( 25 ) delimiting the at least one furnace chamber ( 20 ), the wall having at least one opening ( 5 ) formed in a material-free manner in the form of a simple hole, the at least opening provided with at least one nozzle ( 50 ) adapted to generate a sealing air flow to reduce heat losses of the furnace chamber ( 20 ) through the hole; and
a radiation source or radiation detector positioned outside the at least one furnace chamber and configured to supply or receive electromagnetic radiation through the at least one opening;
wherein:
the radiation source comprises at least one laser ( 3 ) configured to generate a laser beam ( 30 ); and
the device is configured to direct the laser beam onto one or more predetermined partial areas ( 40 ) of the semi-finished glass product ( 4 ).

2. Device according to claim 1 , wherein the at least one nozzle ( 50 ) is a ring nozzle.

3. Device according to claim 1 , wherein the furnace ( 2 ) has a plurality of furnace chambers which are configured to be passed through sequentially by the semi-finished glass product ( 4 ), each furnace chamber configured to be brought to a different temperature.

4. Device according to claim 1 , wherein the radiation detector comprises at least one thermal camera, configured to determine temperature variation on a surface of the semi-finished glass product ( 4 ).

5. Device according to claim 1 , further comprising at least one embossing die ( 6 ) configured to re-shape the semi-finished glass product ( 4 ).

6. Device according to claim 5 , wherein:
the at least one embossing die is located in a partial volume ( 250 ) of the at least one furnace chamber ( 20 ), and
the device is configured to control temperature in the at least one furnace chamber ( 20 ) such that a temperature of the partial volume ( 250 ) differs from a temperature of the remaining volume within the at least one furnace chamber ( 20 ).

7. Device according to claim 5 , wherein a complementarily shaped counter embossing die ( 60 ) is arranged opposite the at least one embossing die ( 6 ).

8. Device according to claim 1 , further comprising at least one movable mirror ( 35 ) configured to direct the laser beam onto said one or more predetermined partial areas ( 40 ) of the semi-finished glass product ( 4 ).

9. Device according to claim 1 , further comprising a transport pallet ( 7 ) having three contact points ( 71 , 72 , 73 ) which define a triangle and are configured to be received in an interlocking fashion in associated receiving devices ( 8 ) of the at least one furnace chamber ( 20 ).

10. Device according to claim 9 , wherein the transport pallet has a center of gravity located within the triangle defined by the three contact points.

11. Device according to claim 9 , wherein the contact points have a V-shaped support body and the receiving devices have a round outer cross-section.

12. Device according to claim 9 , wherein one of the receiving devices of the at least one furnace chamber receives a plurality of contact points.

13. Device according to claim 1 , wherein the furnace has at least one air circulation system configured to circulate air in the at least one furnace chamber.

14. Device according to claim 1 , wherein the furnace comprises at least one sheet metal heat deflector which is arranged inside the at least one furnace chamber and covers at least part of the wall, the at least one sheet metal heat deflector having a line of sight to the semi-finished glass product.

15. Device according to claim 14 , wherein the furnace comprises at least one heating unit configured to bring the at least one sheet metal heat deflector to a predetermined temperature.

16. Device according to claim 14 , wherein:
the furnace has at least one air circulation system configured to circulate air in the at least one furnace chamber; and
the at least one air circulation system is configured to generate an air flow which flows behind at least part of the at least one sheet metal heat deflector.

17. Device according to claim 1 , comprising at least one positioning system configured to move the semi-finished glass product about at least one axis, within the at least one furnace chamber.

18. Device according to claim 1 , comprising at least one positioning system configured to rotate the semi-finished glass product about at least one axis, within the at least one furnace chamber.

19. A furnace ( 2 ) configured to accommodate a semi-finished glass product ( 4 ), the furnace comprising:
at least one furnace chamber ( 20 ) delimited by a wall ( 25 );
at least one opening ( 5 ) formed in a ceiling of the at least one furnace chamber ( 20 );
at least one laser ( 3 ) configured to generate a laser beam ( 30 );
at least one movable mirror ( 35 ) configured to direct the laser beam onto one or more predetermined partial areas ( 40 ) of the semi-finished glass product ( 4 );
a ring nozzle positioned at the at least one opening and configured to create a sealing air flow to promote heat retention in the at least one furnace chamber; and
a transport pallet ( 7 ) having three contact points ( 71 , 72 , 73 ) which define a triangle and are configured to be received in an interlocking fashion in associated receiving devices ( 8 ) of the at least one furnace chamber ( 20 ).

20. The furnace ( 2 ) according to claim 19 , further comprising:
at least one positioning system configured to rotate the semi-finished glass product about at least one axis, within the at least one furnace chamber.

21. The furnace ( 2 ) according to claim 20 , further comprising:
at least one embossing die ( 6 ) arranged on one side of a semi-finished glass product ( 4 ) located in the at least one furnace chamber; and
at least one complementarily shaped counter embossing die ( 60 ) arranged on an opposite side of the semi-finished glass product ( 4 ).

22. The furnace ( 2 ) according to claim 19 , further comprising:
at least one sheet metal heat deflector which is arranged inside the at least one furnace chamber and covers at least part of the wall, the at least one sheet metal heat deflector having a line of sight to the semi-finished glass product.

23. Device ( 1 ) comprising:
a furnace ( 2 ) having at least one furnace chamber ( 20 ) adapted to receive a semi-finished glass product ( 4 );
a wall ( 25 ) delimiting the at least one furnace chamber ( 20 ), the wall having at least one opening ( 5 ) formed in a material-free manner in the form of a simple hole, the at least opening provided with at least one nozzle ( 50 ) adapted to generate a sealing air flow to reduce heat losses of the furnace chamber ( 20 ) through the hole;
a radiation source or radiation detector positioned outside the at least one furnace chamber and configured to supply or receive electromagnetic radiation through the at least one opening; and
at least one embossing die ( 6 ) configured to re-shape the semi- finished glass product ( 4 ).

24. Device ( 1 ) comprising:
a furnace ( 2 ) having at least one furnace chamber ( 20 ) adapted to receive a semi-finished glass product ( 4 );
a wall ( 25 ) delimiting the at least one furnace chamber ( 20 ), the wall having at least one opening ( 5 ) formed in a material-free manner in the form of a simple hole, the at least opening provided with at least

Assignees

• Fraunhofer Ges Forschung

Inventors

• Gremmelspacher Matthias
• Rist Tobias
• Kübler Rainer
• Lang Britta

Classifications

• F27D99/0075

  Gas curtain seals · CPC title

• F27D5/0025

  assembled to present a three-point support · CPC title

• F27B17/0083

  with means for circulating the atmosphere · CPC title

• C03C19/00

  Surface treatment of glass, not in the form of fibres or filaments, by mechanical means (sand-blasting, grinding, or polishing glass B24) · CPC title

• C03B23/0086

  Heating devices specially adapted for re-forming shaped glass articles in general, e.g. burners (C03B23/02, C03B23/04, C03B23/18 take precedence) · CPC title