Apparatus for the production of substrates made of glass, glass ceramics and / or glass ceramic material and process

Abstract

Device (1) for producing substrates (3) from glass, glass ceramics and / or glass ceramic material comprehensive a feeding device (2) for feeding the substrate (3) to a forming roller device (4), wherein the forming roller device (4) has at least one pair of rollers (WP1-WP4), wherein the two rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) of the at least one pair of rollers (WP1-WP4) are arranged opposite each other and spaced apart at a predetermined distance (a1, a2, a3, a4) from each other for rolling the substrate (3) along a transport direction (T) through the two rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b), and an adjustment device (5) for adjusting the viscosity of the substrate (3) such that the viscosity is within a range of more than 10 9 dPas, preferably of at least 10 10 dPas, in particular of at least 10 11dPas, at least in the forming roller device (4), characterized in that the forming roller device (4) has a support device (6) for pressing the rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) of the at least one pair of rollers (WP1-WP4) against the substrate (3).

Description

[0001] The invention relates to a device for producing substrates made of glass, glass ceramic and / or glass ceramic material, comprising a feeding device for feeding the substrate to a forming roller device, wherein the forming roller device has at least one pair of rollers, wherein the two rollers of the at least one pair of rollers are arranged opposite each other and spaced apart at a predetermined distance from each other for rolling the substrate along a transport direction through the two rollers.

[0002] The invention further relates to a method for producing substrates from glass, glass ceramic and / or glass ceramic material comprising the steps of: feeding the substrate to a rolling device by means of a feeding device, and rolling the fed substrate through a forming rolling device which has at least one pair of rollers, wherein the two rollers of the at least one pair of rollers are arranged opposite each other and spaced apart at a predetermined distance from each other for rolling the substrate through the two rollers.

[0003] Although the present invention is generally applicable to any substrate, the present invention will be explained in relation to glass substrates.

[0004] Portable devices such as laptops, smartphones, and the like use glass that is highly prone to devitrification. Examples include high-refractive-index optical glass used in augmented reality applications or high-strength, temperable glass used as cover glass for electronic devices.

[0005] Devices and methods for producing substrates from glass, glass ceramics and / or glass ceramic material are generally known in the prior art, for example from DE 14 96 447 A, GB 2 445 906 A, US 5 885 315 A, US 5 970 747 A or DE 20 48 618 A1.

[0006] The glasses are manufactured using hot forming, whereby they are processed within a viscosity range of 10 that is critical for the glasses. 3 -10 5dPas is performed. This applies in particular to thicknesses below 4 mm, 2 mm, 1 mm, 0.5 mm, and 0.3 mm, respectively, for which the previously known hot forming process is not applicable.

[0007] One object of the present invention is therefore to provide a device and a method for producing substrates made of glass, glass ceramics and / or glass ceramic material, with which thin substrates can be produced in a simple, cost-effective and reliable manner.

[0008] Another object of the present invention is to provide an alternative device and an alternative method for producing substrates made of glass, glass ceramics and / or glass ceramic material.

[0009] In one embodiment, the present invention solves the aforementioned problems by means of a device for producing substrates from glass, glass-ceramic and / or glass-ceramic material comprising a feeding device for feeding the substrate to a forming roller device, wherein the forming roller device has at least one pair of rollers, wherein the two rollers of the at least one pair of rollers are arranged opposite each other and spaced apart at a predetermined distance from one another for rolling the substrate along a transport direction through the two rollers, and an adjustment device for adjusting the viscosity of the substrate such that the viscosity is within a range of at least 10 7,6 dPas, in particular of at least 10 9 dPas, preferably of at least 10 10 dPas, in particular of at least 10 11dPas, at least in the forming roller assembly. The device is characterized in that the forming roller assembly has a support device for pressing the rollers of the at least one pair of rollers against the substrate.

[0010] In a further embodiment, the present invention solves the aforementioned problems by a method for producing substrates from glass, glass-ceramic and / or glass-ceramic material, comprising the steps of: feeding the substrate to a forming roller device by means of a feeding device, rolling the fed substrate through the forming roller device, which has at least one pair of rollers, wherein the two rollers of the at least one pair of rollers are arranged opposite each other and spaced apart at a predetermined distance from each other for rolling the substrate through the two rollers, and adjusting the viscosity of the substrate such that the viscosity is in the range of at least 107,6 dPas, in particular of at least 10 9 dPas, preferably of at least 10 10 dPas, in particular of at least 10 11 dPas, at least in the forming roller device.

[0011] One of the advantages achieved is that the viscosity is maintained at a sufficiently high level, allowing for a sufficiently high forming force to produce very smooth surfaces and adequately thin substrates. Another potential advantage is that the number of rolling passes can be significantly reduced, enabling faster and more cost-effective production. A further potential advantage is that the overall installation space required for the device can be reduced.

[0012] According to a further development, the rollers of at least one pair of rollers have a diameter of less than 200 mm, in particular less than 125 mm, preferably less than 75 mm, particularly between 5 mm and 70 mm, preferably between 30 mm and 60 mm. A possible advantage of this is, on the one hand, a compact design of the rollers; on the other hand, forming rollers with a smaller diameter allow for thinner substrates with fewer rolling passes at the same viscosity and forces: the possible thickness reduction per rolling pass is therefore greater with smaller roller diameters.

[0013] According to further training, a force of more than 5*10 can be applied using the forming roller device. 6 N / m based on the length of the rollers, especially more than 10 7 N / m, preferably more than 10 8 N / m, especially more than 10 9 N / m, especially more than 10 10 N / m, preferably more than 10 11N / m, exertable on the substrate. One of the potential advantages of this is that a sufficiently high force can be provided for forming at high viscosity, so that the substrates based on glass and / or glass-ceramics can be used outside the critical viscosity range of approximately 10 5 dPas can be produced.

[0014] According to a further development, the forming roller device achieves a ratio of force, based on the length of a roller and the diameter of a roller, of at least 0.5*10 7 N / m 2 , preferably of more than 10 8 N / m 2 , especially of more than 10 9 N / m 2 , especially of more than 10 10 N / m 2 , preferably of more than 0.5*10 11 N / m 2 , especially of more than 10 12 N / m 2The advantage of this is that, depending on the length of the roller, sufficient force can be provided for shaping the substrate.

[0015] According to a further development, the forming roll device and the adjustment device are designed to interact in such a way that a ratio of force per length of a roll to viscosity of more than 0.01 m / s, in particular more than 0.1 m / s, preferably more than 1 m / s, is provided. This allows the number of roll passes to be reduced. The higher the aforementioned value, the fewer roll passes are generally required to achieve a target or final thickness of the substrate.

[0016] According to further development, the adaptation device includes a temperature control device, in particular a heating device, for adjusting the substrate temperature. The advantage of this is that the substrate can be kept at a desired temperature, which simplifies the manufacturing process and ensures high substrate quality after production.

[0017] According to the invention, the forming roller assembly has a support device for pressing the rollers of at least one pair of rollers against the substrate. The advantage of this is a particularly cost-effective way to prevent deflection of the rollers of the forming roller assembly while simultaneously providing a high forming force.

[0018] According to a further development, the support device has a plurality of backup rollers which are designed to interact with the rollers for the transmission of forces, in particular wherein the diameter of the backup rollers is larger than the diameter of the rollers interacting with the backup rollers. The advantage of backup rollers is that they represent a particularly cost-effective way to reduce or suppress deflection of the rollers of the forming roller device.

[0019] According to a further development, a multiple pair of rollers are arranged one behind the other in the transport direction. This enables continuous production or continuous rolling of the substrate until the desired target or final thickness is reached.

[0020] According to a further development, the distance between two rollers of a roller pair is smaller compared to the distance between two rollers of a roller pair positioned upstream in the transport direction of the substrate. This enables a continuous reduction of the substrate thickness along the transport direction. A complex adjustment or change of the roller spacing is therefore unnecessary.

[0021] According to a further embodiment, the ratio of the distances between the rollers of two consecutive pairs of rollers in the transport direction is at least 1 / 3, preferably at least 50% smaller, particularly wherein the ratio of the distances between the rollers of the last and first pair of rollers in the transport direction is less than 10%, particularly less than 7.5%, preferably equal to or less than 4%. This enables an efficient reduction of the substrate thickness in the transport direction while simultaneously providing sufficiently high rolling forces. Overall, this optimizes the number of rolling passes.

[0022] According to a further embodiment, the transport speed of the substrate, at least within the forming rolling unit, is at least 1 mm / s, preferably at least 1.5 mm / s, particularly more than 2.0 mm / s, preferably more than 2.75 mm / s, and particularly more than 3 mm / s or more. This ensures a sufficiently high throughput of rolled substrates without compromising the quality of the substrate.

[0023] According to a further development, the transport speed of a roller pair with a smaller distance between the rollers is greater than the transport speed of a roller pair with a larger distance. The advantage of this is that a constant throughput of substrates can be achieved.

[0024] According to further training, the transport speed v n of a pair of rollers w n , wherein the rollers are spaced a distance d n to each other and the transport speed vn+1 a pair of rollers following in the direction of transport, wherein the rollers are spaced a distance d n+1 to each other, according to the formula vn+1=f*dn / dn+1*vn regulated, with a factor f which is selected between 0.1 and 2, preferably between 0.5 and 1.5, in particular wherein the factor f and / or the transport speeds v n+1 , v n The forming roller assembly, the feeding unit, and / or the adjustment unit can be controlled by means of a control and regulation device. A potential advantage of this is that a sufficient and, in particular, controllable roller speed is provided, which improves the reliability of the manufacturing process.

[0025] According to a further embodiment, the rollers of the forming roller assembly and / or the support device are designed such that the rollers of the forming roller assembly exhibit a deflection of less than 10%, in particular less than 5%, preferably less than 1%, relative to the respective distance between the rollers of the roller pair. This improves the overall manufacturing process, as the substrate maintains a consistent thickness along its entire length on each roller. Furthermore, it increases the service life of the rollers.

[0026] According to a further embodiment, a rolling temperature control device is arranged to regulate the temperature of the rolls, in particular wherein the rolling temperature control device is designed to adapt the temperature of the rolls to the temperature of the substrate. This allows the substrate and the rolls to be kept at essentially the same temperature, which facilitates the production of the substrate.

[0027] According to a further development, at least one roller of the last pair of rollers arranged in the transport direction has a structured surface. The advantage of this is that it enables a structured surface on the substrate. This allows, for example, mechanical or optical effects to be achieved. The high viscosity provided by the device during the shaping of the substrate prevents backflow.

[0028] According to a further development of the process, at least the rollers of the forming roller unit are guided isothermally to the temperature of the substrate. This allows the substrate and the rollers to be kept at essentially the same temperature, which facilitates the production of the substrate.

[0029] According to a further development of the method, at least the rollers of the forming roller assembly are pressed against the substrate by means of at least one additional support roller of a support device. The advantage of support rollers is that they are a particularly cost-effective way to reduce or suppress deflection of the rollers of the forming roller assembly.

[0030] Further important features and advantages of the invention will become apparent from the dependent claims, the drawings and the accompanying description of the figures based on the drawings.

[0031] It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations or on their own, without leaving the scope of the present invention.

[0032] Preferred embodiments and configurations of the present invention are shown in the drawings and are explained in more detail in the following description, wherein identical reference numerals refer to identical or similar or functionally identical components or elements.

[0033] This shows Fig. 1 in schematic form a device according to an embodiment of the present invention; Fig. 2 steps of a method according to an embodiment of the present invention; Fig. 3a, b each a thickness of a glass substrate as a function of the rolling process when using a known device; Fig. 4a, b each a thickness of a glass substrate as a function of the rolling process when using a device according to an embodiment of the present invention; Fig. 5a, b each a thickness of a glass substrate as a function of the rolling process when using a device according to an embodiment of the present invention; and Fig. 6 a thickness of a glass substrate as a function of the roller pair of a device according to an embodiment of the present invention.

[0034] Fig. Figure 1 shows in schematic form a device according to an embodiment of the present invention.

[0035] In Fig. Figure 1 shows a device 1 for producing thin glass substrates 3 using rollers. For this purpose, the glass substrate 3 is fed to a forming roller device 4 by means of a feeding device 2, for example by means of transport rollers or the like, in order to roll it to a desired thickness in the forming roller device 4 by one or more rolling operations. The forming roller device 4 has four pairs of rollers WP1-WP4. The rollers W1a, W1b, ..., W4a, W4b of the roller pairs WP1-WP4 each have a distance a1, a2, a3, a4 that decreases in the transport direction T. The rollers W1a, W1b, ..., W4a, W4b each have a diameter d1, d2, d3, d4. Fig. 1. The rollers of a roller pair always have the same diameter d1, d2, d3, d4; however, it is also conceivable to provide different diameters. The rollers of the last roller pair WP4 in the transport direction have a structured surface 9. On the respective radial outer surface of the rollers of the roller pairs, support rollers S1a, S1b, S2a, S2b, S3a, S3b, S4a, S4b of a support device 6 are arranged, which are intended to prevent or at least reduce deflection of the rollers W1a, W1b, ..., W4a, W4b. The diameters b1, b2, b3, b4 of the respective support rollers S1a, S1b, S2a, S2b, S3a, S3b, S4a, S4b are larger than the diameters d1, d2, d3, d4 of the rollers W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b.Furthermore, a control and regulation device 7 is arranged, which, for example, interacts with an adjustment device 5, which includes a heating device 5a, to maintain a desired high viscosity of the glass substrate 3 during rolling by means of the forming roller unit 4. The same applies accordingly to a rolling temperature control device 8, with which the temperature of the rollers W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b of the forming roller unit 4 and / or the temperatures of the backup rollers S1a, S1b, S2a, S2b, S3a, S3b, S4a, S4b of the backup unit 6 can be controlled.

[0036] Furthermore, the control and regulating device can also change the transport speed of the glass substrate 3 within the forming roller unit 4 by changing the rotational speed of the rollers of the roller pairs of the forming roller unit 4. The same applies to the control of the contact pressure and / or the rolling force of the rollers of the forming roller unit 4. Fig. Figure 2 shows steps of a method according to an embodiment of the present invention.

[0037] In detail, it shows Fig. 2 steps of a process for the production of substrates made of glass, glass ceramics and / or glass ceramic material.

[0038] This includes the following steps: - Feeding S1 of the substrate 3 to a forming roller device 4 by means of a feeding device 2, - Rolls S2 of the supplied substrate 3 by the forming roller device 4, which has at least one pair of rollers WP1-WP4, wherein the two rollers W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b of the at least one pair of rollers WP1-WP4 are arranged opposite each other and spaced apart at a predetermined distance a1, a2, a3, a4 from each other for rolling the substrate 3 by the two rollers W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b, and - Adjusting S3 to the viscosity of substrate 3 such that the viscosity is in the range of at least 10 7,6 dPas, in particular of at least 10 9 dPas, preferably of at least 10 10 dPas, in particular of at least 10 11 dPas, at least in the forming roller unit 4 is held.

[0039] Fig. Figures 3a and b each show the thickness of a glass substrate as a function of the rolling process using a known device.

[0040] Fig. 3a is based on the comparative example 1 described below, Fig. 3b on the experimental example 2 described below: Comparative example 1:

[0041] A section with a pair of rollers, each with a diameter of 300 mm, is inserted into a roller furnace with a reversing drive. The rollers can exert a force of 3*10 6 Apply N / m (based on the roller width). In the roller furnace, a glass ingot made of N-SF6 with an initial thickness of 8.9 mm and a width of 105 mm is preheated to a temperature that is 10 7,6 dPas corresponds to (681 °C). The glass ingot is then passed through the rollers at a speed of 1.57 mm / s, thus reducing its thickness by 1.73 mm. The ingot is then reheated to its initial temperature and passed through the roller pair again. In this first pass, its thickness decreases by 1.17 mm.

[0042] This procedure is repeated until a final thickness of 0.3 mm is reached. This requires 119 passes (see...). Fig. 3a). Comparative example 2:

[0043] A section with a pair of rollers, each with a diameter of 300 mm, is inserted into a roller furnace with a reversing drive. The rollers can exert a force of 3*10 6 Apply N / m (based on the roller width). In this furnace, a glass ingot made of N-SF6 with an initial thickness of 8.8 mm and a width of 105 mm is preheated to a temperature that is 10 9 dPas corresponds to (640 °C). The glass ingot is then passed through the rollers at a speed of 1.57 mm / s, thus reducing its thickness by 1.15 mm. The ingot is then reheated to its initial temperature and passed through the roller pair again. In this first pass, its thickness decreases by 0.9 mm.

[0044] This procedure is repeated until a final thickness of 0.3 mm is reached. This requires 189 passes (see...). Fig. 3b).

[0045] Fig. Figures 4a and 4b each show the thickness of a glass substrate as a function of the rolling process when using a device according to an embodiment of the present invention. Fig. 5a, b each a thickness of a glass substrate as a function of the rolling process when using a device according to an embodiment of the present invention.

[0046] Fig. 4a is based on the embodiment 1 described below, Fig. 4b on the embodiment 2 described below. Fig. 5a is based on the embodiment 3 described below and Fig. 5b on the embodiment 4 described below. Example 1:

[0047] A section with a pair of rollers, each 60 mm in diameter, is inserted into a roller furnace with a reversing drive. To prevent deflection, the rollers are supported by backup rollers. The rollers can withstand a force of 3 x 10 9 Apply N / m (based on the roller width). In this furnace, a glass ingot made of N-SF6 with an initial thickness of 15 mm and a width of 105 mm is preheated to a temperature that is 10 9 dPas corresponds to (648 °C). The glass ingot is then passed through the rollers at a speed of 1.57 mm / s, thus reducing its thickness by 7.4 mm. The ingot is then reheated to its initial temperature and passed through the roller pair again. In this first pass, its thickness decreases by 3.7 mm.

[0048] This procedure is repeated until a final thickness of 0.3 mm is reached. Six passes are required. Example 2:

[0049] A section with a pair of rollers, each 60 mm in diameter, is inserted into a roller furnace with a reversing drive. To prevent deflection, the rollers are supported by backup rollers. The rollers can withstand a force of 3 x 10 9 Apply N / m (based on the roller width). In this furnace, a glass ingot made of N-SF6 with an initial thickness of 12 mm and a width of 105 mm is preheated to a temperature that is 10 10 dPas corresponds to (629 °C). The glass ingot is then passed through the rollers at a speed of 1.57 mm / s, thus reducing its thickness by 4.8 mm. The ingot is then reheated to its initial temperature and passed through the roller pair again. In this first pass, its thickness decreases by 2.4 mm.

[0050] This procedure is repeated until a final thickness of 0.3 mm is reached. Five passes are required. Example 3:

[0051] A section with a pair of rollers, each 60 mm in diameter, is inserted into a roller furnace with a reversing drive. To prevent deflection, the rollers are supported by backup rollers. The rollers can withstand a force of 3 x 10 10 Apply N / m (based on the roller width). In this furnace, a glass ingot made of N-SF6 with an initial thickness of 15 mm and a width of 105 mm is preheated to a temperature that is 10 10 dPas corresponds to (629 °C). The glass ingot is then passed through the rollers at a speed of 1.57 mm / s, thus reducing its thickness by 7.4 mm. The ingot is then reheated to its initial temperature and passed through the roller pair again. In this first pass, its thickness decreases by 3.7 mm.

[0052] This procedure is repeated until a final thickness of 0.3 mm is reached. Six passes are required. Example 4:

[0053] A section with a pair of rollers, each with a diameter of 30 mm, is inserted into a roller furnace with a reversing drive. To prevent deflection, the rollers are supported by backup rollers. The rollers can withstand a force of 3 x 10 9 Apply N / m (based on the roller width). In this furnace, a glass ingot made of N-SF6 with an initial thickness of 12 mm and a width of 105 mm is preheated to a temperature that is 10 10 dPas corresponds to (629 °C). The glass ingot is then passed through the rollers at a speed of 1.57 mm / s, thus reducing its thickness by 6.1 mm. The ingot is then reheated to its initial temperature and passed through the roller pair again. In this first pass, its thickness decreases by 3.1 mm.

[0054] This procedure is repeated until a final thickness of 0.3 mm is reached. Eight passes are required.

[0055] Fig. Figure 6 shows the thickness of a glass substrate as a function of the roller pair of a device according to an embodiment of the present invention. In detail, it shows Fig. 6. Multiple rolling of glass from the melt. For this purpose, glass is poured from a feeder of a melting furnace into a three-sided closed ingot casting shaft. This serves essentially as a feeding device for a subsequent shaping rolling unit. A first pair of rollers of the shaping rolling unit, with a diameter of 30 mm, is attached to the fourth side of the shaft. This pair of rollers is supported by backup rollers, so that forces of 3*10 9 N / m can be applied. The glass moves at 3 mm / s and has a viscosity of 10 upon entering the roller gap. 9 dPas and a thickness of 15mm. It now passes through a total of 6 pairs of rollers, which are supported by backup rollers, exerting a force of 3*10 9Apply N / m. The speed of the roller pairs is adjusted so that the throughput between each roller pair is constant. The rollers in contact with the glass are operated isothermally with the glass, meaning their temperature is set according to the glass viscosity. The distance between the rollers in each roller pair is: 7.5 mm, 3.7 mm, 1.8 mm, 0.9 mm, 0.46 mm, and 0.3 mm.

[0056] In summary, at least one embodiment of the invention has at least one of the following advantages: - High quality of the rolled substrate, especially very smooth surfaces - Simple, cost-effective production - High reliability - Production of thin glasses less than 4mm thick at high viscosity

[0057] Although the present invention has been described using preferred embodiments, it is not limited to these, but can be modified in many ways. Reference symbol list 1 Device 2 Feeding device 3 Glass substrate 4 Forming roller device 5 Adjustment device 5a Heating system 6 Support device 7 Control and regulation device 8 Rolling temperature control device 9 Surface structure WP1-WP4 roller pairs W1a, W1b, ..., W4a, W4b rollers S1a, S1b, ..., S4a, S4b support rollers a1, ..., a4 Distance between rollers in the roller pair b1, ..., b4 Diameter of support roller d1, ..., d4 Diameter of roller S1, S2, S3 Procedure steps

Claims

Device (1) for producing substrates (3) from glass, glass ceramic and / or glass ceramic material comprising a feeding device (2) for feeding the substrate (3) to a forming roller device (4), wherein the forming roller device (4) has at least one pair of rollers (WP1-WP4), wherein the two rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) of the at least one pair of rollers (WP1-WP4) are arranged opposite each other and spaced apart at a predetermined distance (a1, a2, a3, a4) from each other for rolling the substrate (3) along a transport direction (T) through the two rollers (W1a, W1b; W2a, W2b; W3a, W3b;W4a, W4b), and an adjustment device (5) for adjusting the viscosity of the substrate (3) such that the viscosity is maintained in a range of more than 109 dPas, preferably at least 1010 dPas, in particular at least 1011 dPas, at least in the forming roller device (4), characterized in that the forming roller device (4) has a support device (6) for pressing the rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) of the at least one pair of rollers (WP1-WP4) against the substrate (3). Device according to claim 1, wherein the rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) of the at least one pair of rollers (WP1-WP4) have a diameter (d1, d2, d3, d4) of less than 200 mm, in particular less than 125 mm, preferably less than 75 mm, in particular between 5 mm and 70 mm, preferably between 30 mm and 60 mm. Device according to one of claims 1 - 2, wherein a force of more than 5*106N / m based on the length of the rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b), in particular more than 107N / m, preferably more than 108N / m, in particular more than 109N / m, in particular more than 1010N / m, preferably more than 1011N / m, can be exerted on the substrate (3) by means of the forming roller device (4). Device according to one of claims 1 - 3, wherein by means of the forming roller device (4) a ratio of the force based on the length of a roller (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) and the diameter (d1, d2, d3, d4) of a roller of at least 0.5*107N / m2, preferably more than 108N / m2, in particular more than 109N / m2, in particular more than 1010N / m2, preferably more than 0.5*1011N / m2, in particular more than 1012N / m2 can be provided. Device according to one of claims 1-4, wherein the forming roller device (4) and the adjusting device (5) are designed to interact in such a way that a ratio of force per length of a roller and viscosity of more than 0.01 m / s, in particular more than 0.1 m / s, preferably more than 1 m / s, is provided. Device according to one of claims 1-5, wherein the adjustment device (5) comprises a temperature control device (5a), in particular a heating device, for adjusting the temperature of the substrate (3). Device according to one of claims 1-6, wherein the support device (6) has a plurality of support rollers (S1a, S1b; S2a, S2b; S3a, S3b; S4a, S4b) which are designed to interact with the rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) for the transmission of forces, in particular wherein the diameter (b1, b2, b3, b4) of the support rollers (S1a, S1b; S2a, S2b; S3a, S3b; S4a, S4b) is larger than the diameter (d1, d2, d3, d4) of the rollers (W1a, W1b; W2a, W2b; S3a, S3b; S4a, S4b) interacting with the support rollers (S1a, S1b; S2a, S2b; S3a, S3b; S4a, S4b). W3a, W3b; W4a, W4b). Device according to one of claims 1 - 7, wherein a plurality of roller pairs (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) are arranged one behind the other in the transport direction (T). Device according to claim 8, wherein the distance (a1, a2, a3, a4) between two rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) of a pair of rollers (WP1-WP4) is smaller compared to the distance (a1, a2, a3, a4) between two rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) of a pair of rollers (WP1-WP4) arranged in front of the substrate (3) in the transport direction (T). Device according to claim 9, wherein the ratio of the distances (a1, a2, a3, a4) between rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) of two pairs of rollers (WP1-WP4) following one another in the transport direction (T) is at least 1 / 3, preferably at least 50% smaller, in particular wherein the ratio of the distances (a1, a2, a3, a4) between the rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) of the last and first pair of rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) in the transport direction (T) is less than 10%, in particular less than 7.5%, preferably equal to or less than 4%. Device according to one of claims 1 - 10, wherein the transport speed of the substrate (3) is at least 1 mm / s, preferably at least 1.5 mm / s, in particular more than 2 mm / s, preferably more than 2.75 mm / s, in particular more than 3 mm / s or more, at least within the forming roller device (4). Device according to one of claims 9 - 10, wherein the transport speed of a pair of rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) with a smaller distance (a1, a2, a3, a4) between the rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) is greater than the transport speed of a pair of rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) with a larger distance (a1, a2, a3, a4). Device according to claim 12, wherein the transport speed v of a pair of rollers wn(W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b), wherein the rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) have a distance dn from each other, and the transport speed vn+1 of a pair of rollers following in the transport direction (T) (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b), wherein the rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) have a distance dn+1 from each other, according to the formula vn + 1 = f * dn / dn + 1 * vn is regulated with a factor f, which is selected between 0.1 and 2, preferably between 0.5 and 1.5, in particular wherein the factor f and / or the transport speeds v n+1 , v n can be controlled by means of a control and regulating device (7) for the forming roller device (4), the feeding device (2) and / or the adjusting device (5). Device according to one of claims 1-13, wherein the rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) of the forming roller device (4) and / or the support device (6) are designed such that the rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) of the forming roller device (4) have a deflection of less than 10%, in particular less than 5%, preferably less than 1%, based on the respective distance (a1, a2, a3, a4) of the rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) of the roller pair (WP1-WP4). Device according to one of claims 1 - 14, wherein a rolling temperature control device (8) is arranged for controlling the temperature of the rolls (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b), in particular wherein the rolling temperature control device (8) is configured to adapt the temperature of the rolls (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) to the temperature of the substrate (3). Device according to one of claims 1 - 15, wherein at least one roller (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) of the last pair of rollers (W4a, W4b) arranged in the transport direction (T) has a structured surface (9). A method for producing substrates from glass, glass-ceramic and / or glass-ceramic material comprising the steps of: - feeding (S1) the substrate (3) to a forming roller device (4) by means of a feeding device (2), - rolling (S2) the fed substrate (3) through the forming roller device (4), which has at least one pair of rollers (WP1-WP4), wherein the two rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) of the at least one pair of rollers (WP1-WP4) are arranged opposite each other and spaced apart at a predetermined distance (a1, a2, a3, a4) from each other for rolling the substrate (3) through the two rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b), and - adjusting (S3) the viscosity of the substrate (3) such that the Viscosity in the range of more than 109 dPas, preferably at least 1010 dPas, in particular at least 1011 dPas, is maintained at least in the forming roller device (4), wherein at least the rollers (W1a, W1b; W2a, W2b; W3a, W3b;W4a, W4b) of the forming roller device (4) by means of at least one additional support roller (S1a, S1b; S2a, S2b; S3a, S3b; S4a, S4b) of a support device (6) are pressed against the substrate (3).; Method according to claim 17, wherein at least the rollers (W1a, W1b; W2a, W2b; W3a, W3b; W4a, W4b) of the forming roller device (4) are guided isothermally to the temperature of the substrate (3).

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