OVEN SYSTEM FOR HEATING LAMINATED GLASS PANES

Abstract

The present invention relates to an oven system 7 for heating laminated glass panes 1, having at least one oven module 8, wherein the laminated glass panes are able to be transported in a horizontal orientation on transport rollers 10 through the oven system 7, and the oven system 7 has an outer box-shaped housing 9, wherein radiation heat sources and convection heat sources are disposed in the housing 9, characterized in that the convection heat sources are configured as elongate tubular nozzles having punctiform outflow openings which are disposed so as to be oriented transversely to the transport direction, wherein in a heat radiator 11 is disposed between two adjacently disposed tubular nozzles 12, and in that a central blower box which supplies the tubular nozzles 12 with heated air is disposed on an end face.

Claims

1. Oven system for heating laminated glass panes having at least one oven module, wherein the laminated glass panes are able to be transported in a horizontal orientation on transport rollers through the oven system.sub., and the oven system has an outer box-shaped housing, wherein radiation heat sources and convection heat sources are disposed in the housing, wherein the convection heat sources are configured as elongate tubular nozzles having punctiform outflow openings which are disposed so as to be oriented transversely to the transport direction, wherein a heat radiator is disposed between two adjacently disposed tubular nozzles, and in that a central blower box which supplies the tubular nozzles with heated air is disposed on an end face.

2. Oven system according to claim 1, wherein tubular nozzles and heat radiators are disposed on the upper side and the lower side of the glass panes to be transported.

3. Oven system system according to claim 1, wherein for each tubular nozzle on the upper side, one tubular nozzle is disposed opposite thereto on the lower side.

4. Oven system system according to claim 1, wherein for each heat radiator on the upper side, one heat radiator is disposed opposite thereto on the lower side.

5. Oven system system according to claim 1, wherein the blower box is disposed in the housing.

6. Oven system system according to claim 1, wherein the blower box inducts the interior air in the housing, wherein an induction opening in terms of the vertical direction (V) is disposed in an upper part of the housing.

7. Oven system according to claim 1, wherein the blower box is assigned a heating installation.

8. Oven system according to on claim 1, wherein the tubular nozzles also apply heated air laterally at an angle between 10 and 80°, in particular between 20 and 70°, to the surface of the laminated glass panes.

9. Oven system according to claim 1, wherein the tubular nozzles in the vertical direction are disposed behind a transport roller, and in that a radiation heat source is disposed between two transport rollers.

Description

[0022] Further advantages, features and properties of the present invention are the subject matter of the description hereunder. Preferred variants of design embodiments are illustrated in schematic figures. The latter serve for readily understanding the invention. In the figures:

[0023] FIGS. 1a to c show different glass pane stacks in a schematic lateral view;

[0024] FIG. 2 shows an oven module in a longitudinal sectional view;

[0025] FIG. 3 shows two oven modules which are disposed in series behind one another in a cross-sectional view;

[0026] FIG. 4 shows a schematic cross-sectional view pertaining to tubular nozzles and heat radiators, having transport rollers; and

[0027] FIG. 5 shows a cross-sectional view through a tubular nozzle.

[0028] In the figures, the same reference signs are used for identical or similar components, even when repetition of the description is dispensed with for reasons of simplification.

[0029] FIG. 1 a, b, c and d show different laminated glass panes 1 in a cross-sectional view. The laminated glass pane 1 according to FIG. 1 is composed of a glass pane stack 2 consisting of an upper glass pane 3 and a lower glass pane 4 that lie so as to be parallel on top of one another. A film 5 is disposed therebetween. Using the oven system 7 according to the invention it is possible for the film 5, situated between the glass panes, to be heated such that said film is softened and is adhesively bonded to the glass panes.

[0030] FIG. 1b likewise shows a laminated glass pane 1. The glass pane stack 2 here, however, is composed of three glass panes, consequently an upper glass pane 3, a lower glass pane 4, and a central glass pane 6. A film 5 is in each case disposed therebetween. According to FIG. 1c, the glass pane stack 2 is composed of four glass panes, each having films 5 disposed therebetween. In particular in the case of the glass panes according to FIGS. 1b and 1c it is consequently more difficult for the films 5 lying further inward to be homogeneously heated on both sides.

[0031] To this end, the oven system 7, which in FIG. 2 is illustrated in longitudinal section in an end-on view, provides that at least one oven module 8, which has an external box-shaped housing, is configured. According to the cross-sectional view in FIG. 3, two oven modules 8 are disposed in series behind one another in a transport direction, wherein the box-shaped housing 9 of both oven modules 8 is connected in the center such that an external box-shaped housing 9 is configured.

[0032] Transport rollers 10 are disposed in the oven module 8 per se. The transport rollers 10 per se can be actively driven, for example, and in this instance in the transport direction T convey a laminated glass pane 1, or a plurality of successive laminated glass panes 1, respectively, through the oven system 7.

[0033] A combination of heat radiators and tubular nozzles are disposed so that the laminated glass panes 1 are now heated within the oven system 7. The heat radiators 11 here generate thermal radiation. The tubular nozzles 12 generate an airflow which then leads to convective heating. A blower box 13 is disposed according to the invention on the end face, in terms of the image plane of FIG. 2, on the right side within the box-shaped housing 9. This blower box 13 is connected to a ventilator 14 which in turn is coupled to an induction opening 15. Inducted through the latter is a heated airflow 16 within the box-shaped housing 9. In terms of the vertical direction V, the induction opening 15 is thus disposed in the upper third such that the heated rising air is inducted and then, by the ventilator 14, is directed into the blower box 13. The blower box 13 per se in turn is coupled to the tubular nozzles by way of a connector on the end face. In this way, tubular nozzles 12 which, in terms of the image plane, are disposed at the top as well as at the bottom in an oven module 8 can be fed centrally with hot convection air by way of a blower box.

[0034] Optionally or additionally, an induction duct can be disposed upstream of the induction opening 15. The induction duct 20 per se can be adjusted by way of adjustable openings 20 which are variable in terms of the opening size thereof. As a result of the openings 19 and an induction duct 20 being disposed in an upper part of the housing 9, rising air containing residual heat can in turn be inducted. Reheating can take place while using a minimum amount of supplied external energy.

[0035] It can furthermore be readily seen, in particular in a schematic illustration according to FIG. 4, that heated air from the tubular nozzles 12 also exits in each case laterally from a tubular nozzle 12. In this way, a respective tubular nozzle 12 in terms of the vertical direction V can also be disposed behind a transport roller 10. Nevertheless, it is possible that the air, by way of the respective exit opening which is configured in particular as a hole within the tube of the tubular nozzle 12, exits at an angle α unequal to 90 degrees in terms of the glass surface or the transport direction T, respectively, thus obliquely or laterally impacting a glass surface, respectively. The advantage that tubular nozzles 12 can also be disposed in a concealed manner, consequently behind a transport roller 10, is achieved in this way. At the same time, a larger area A is covered or wetted by hot air from the tubular nozzle 12, respectively. This is illustrated in FIG. 4, at the tubular nozzle 12 which is approximately in the center. The dwell time in the oven can thus be shortened, or the transport speed can be increased, respectively, while maintaining homogeneous heating.

[0036] FIG. 5 shows a tubular nozzle 12 in the cross-sectional view. Illustrated are the exit openings 21 through which the heated air L can exit the tubular nozzle 12. The exit openings 21 extend across an angular range, or angle α, respectively, of preferably between 10° and 80°, in particular between 20° and 70°. In this way, the heated air can also be applied to the surface of the glass pane stack at an angle.

TABLE-US-00001 Reference signs: 1 - Laminated glass pane 2 - Glass pane stack 3 - Upper glass pane 4 - Lower glass pane 5 - Film 6 - Central glass pane 7 - Oven system 8 - Oven module 9 - Housing 10 - Transport roller 11 - Heat radiator 12 - Tubular nozzle 13 - Blower box 14 - Ventilator 15 - Induction opening 16 - Heated airflow 17 - End-face connector 18 - Laterally outflowing air 19 - Openings 20 - Induction duct 21 - Exit openings L - Airflow T - Transport direction V - Vertical direction A - Area α - Angle