A glass cold rolling device

Abstract

The application discloses a glass cold rolling device, comprising: a feeding unit configured to guide glass liquid into an extruding unit; the extruding unit is arranged corresponding to the discharge port of the feeding unit, and is configured to receive the glass liquid discharged by the feeding unit and extrude the glass liquid into a glass sheet; a cooling unit connected with the extruding unit, the cooling unit comprises a gas pipeline and a gas source communicated with the gas pipeline, the gas outlet of the gas pipeline is arranged in the extruding unit and is configured to blow high-pressure gas towards the non-working area of the extruding unit, and the non-working area of the extruding unit comprises the area from the disengagement point of the extruding unit from the glass sheet to the next contact with the glass liquid.

Description

Technical Field

[0001] This application relates to the field of glass production equipment technology, and in particular to a glass cold rolling apparatus. Background Technology

[0002] Cold rolling is a crucial step in photovoltaic glass processing. It involves pressing molten glass at high temperatures into thin sheets using metal rollers on a cold rolling mill for subsequent crushing. However, molten glass often remains on the roller surface after pressing, causing unevenness and even metal deformation. Currently, manual blowing is commonly used to remove this residue. However, to avoid the safety risk of glass shards flying out and injuring people, the machine must be stopped for blowing, resulting in low processing efficiency.

[0003] Meanwhile, current cooling methods for metal drums primarily rely on circulating cooling water through the center of the drum. This water conducts heat away from the drum's interior through the metal walls, maintaining the drum's basic operating condition. However, this cooling method only cools the inside of the drum, leaving the drum surface in direct contact with the high-temperature molten glass. This can easily lead to oxidation and blackening, affecting the glass processing results. Utility Model Content

[0004] The purpose of this application is to provide a glass cold rolling device for timely cleaning of glass residue on the surface of the roller, thereby improving the working efficiency of the roller, reducing oxidation on the roller surface, extending the service life of the roller, and reducing costs.

[0005] To achieve the above objectives, this application provides the following technical solution: A glass cold rolling apparatus, comprising: A feeding unit configured to introduce molten glass into an extrusion unit; An extrusion unit is provided, which is corresponding to the outlet of the feeding unit. The extrusion unit is configured to receive the molten glass discharged from the feeding unit and extrude it into a glass sheet. A cooling unit is connected to the extrusion unit. The cooling unit includes a gas pipeline and a gas source connected to the gas pipeline. The gas outlet of the gas pipeline is located inside the extrusion unit and configured to blow high-pressure gas toward the non-working area of ​​the extrusion unit. The non-working area of ​​the extrusion unit includes the transition area of ​​the extrusion unit from the point where the glass sheet separates from the glass sheet to the next contact with the molten glass.

[0006] Compared with existing technologies, the glass cold rolling apparatus provided in this application, by setting the gas outlet of the cooling unit's gas pipeline in the non-working area of ​​the extrusion unit (specifically, the transition area from the glass sheet detachment point to the next contact with molten glass), and introducing high-pressure gas into this area for purging, can blow off glass residue before it has been re-compacted and while the temperature is within a suitable range for removal. This design achieves targeted removal of residual glass on the roller surface, effectively preventing residual glass from entering the next extrusion cycle with the roller due to failure to clean it in time, thus avoiding the problem of uneven roller surface caused by repeated friction. Simultaneously, this solution eliminates the need for manual intervention in the extrusion unit's working area, completely avoiding direct contact between personnel and high-temperature, high-speed equipment, reducing the occurrence of production accidents; and since cleaning can be completed without stopping the machine, the roller can remain in continuous operation, reducing the unit glass production time cost and significantly improving work efficiency.

[0007] Furthermore, in this application, while the high-pressure gas is blowing away the residual glass, it can also directly carry away the heat from the surface of the roller through the airflow, thereby reducing the surface temperature of the roller, inhibiting the oxidation reaction, and reducing the adverse effects of the oxide layer on the glass quality.

[0008] In summary, the glass cold rolling apparatus provided in this application reduces roller wear and oxide layer formation through the above design, which not only reduces equipment maintenance costs but also reduces the glass defect rate, achieving multi-dimensional optimization of efficiency, safety, quality, and cost.

[0009] Compared with existing technologies, the glass cold rolling apparatus provided in this application, by setting the gas outlet of the cooling unit's gas pipeline in the non-working area of ​​the extrusion unit—that is, the area from the glass sheet detachment point to the next contact with molten glass—and introducing high-pressure gas to purge in the non-working area, can blow off glass residue before it has been secondary compacted and is at a suitable temperature for removal. This achieves targeted removal of residual glass on the roller surface, preventing it from entering the next extrusion cycle with the roller due to failure to clean it in time, causing repeated friction and resulting in an uneven roller surface. Furthermore, this application eliminates the need for manual intervention in the extrusion unit's working area, completely avoiding direct contact between personnel and high-temperature, high-speed equipment, reducing the occurrence of production accidents. Cleaning can be completed without stopping the machine, allowing the roller to maintain continuous operation, reducing the unit glass production time cost, and improving work efficiency.

[0010] Based on this, in this application, while the high-pressure gas is blowing away the residual glass, it can directly remove the surface heat through the airflow, reduce the surface temperature of the roller, inhibit the occurrence of oxidation reaction, and reduce the impact of the oxide layer on the glass.

[0011] In summary, the glass cold rolling apparatus provided in this application reduces equipment maintenance costs and glass defect rate by minimizing roller wear and oxide layer formation. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This application illustrates a schematic diagram of the structure of a glass cold rolling apparatus provided in an exemplary embodiment. Figure 1 ; Figure 2 This application illustrates a schematic diagram of the structure of a glass cold rolling apparatus provided in an exemplary embodiment. Figure 2 ; Figure 3 A schematic diagram of the structure of the tee pipe provided in an exemplary embodiment of this application is shown.

[0013] Figure label: 100-Glass cold rolling unit; 110-Feeding unit; 111-Feeding trough; 120-Extrusion unit; 121-Roller; 1211-Extrusion channel; 130-Cooling unit; 131-Gas pipeline; 1311-Main pipeline; 1312-Branch pipeline; 1313-Tee pipe. Detailed Implementation

[0014] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0015] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly specified. "Several" means one or more, unless otherwise expressly specified.

[0017] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0018] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0019] With the continuous development of solar new energy technology and the constant upgrading of photovoltaic technology, the performance requirements of photovoltaic glass for high temperature resistance and impact resistance are constantly increasing in order to adapt to photovoltaic modules with higher power generation efficiency. By adjusting the glass formula (such as increasing the proportion of quartz sand, alumina and other components), its melting temperature is becoming higher and higher (it needs to exceed 1500℃ to reach the melting state), and the mechanical hardness after molding is also significantly enhanced (the Mohs hardness can reach 6-7, close to the hardness of quartz stone).

[0020] Cold rolling is an essential step in the current production of photovoltaic glass. The core of this process relies on the high-speed rotation and extrusion of a metal roller to press molten glass at high temperatures into thin, uniform sheets. This thin sheet structure significantly reduces the difficulty of subsequent crushing processes and improves processing efficiency. However, due to the significantly increased hardness of photovoltaic glass, during the extrusion process, although the high-temperature molten glass is pressed into thin sheets by the roller, its high hardness and continued viscosity at high temperatures make it difficult to completely detach smoothly from the roller surface. A small amount of glass fragments or incompletely cooled and shaped glass particles adhere tightly to the roller surface. To achieve continuous production, the roller in the cold rolling mill must rotate continuously. These high-hardness glass residues adhering to the surface cannot be cleaned in time and will enter the next extrusion cycle with the roller, essentially trapping glass fragments or particles between the roller and the newly injected high-temperature molten glass. Under repeated squeezing and friction, these high-hardness glass residues act like micro-abrasives, constantly scraping and impacting the roller surface. Simultaneously, the continuous contact of the high-temperature molten glass with the roller keeps the metal surface at a high temperature, slightly reducing its hardness and making it more susceptible to being dented or scratched by the hard glass residue. Over time, the originally smooth roller surface gradually becomes uneven. To ensure the quality of the next batch of glass, manual cleaning of the hard glass residue is required, but each cleaning session takes far longer than production time. Furthermore, to avoid the risk of injury from ejected high-temperature glass fragments, manual cleaning cannot be performed while pouring molten glass, severely reducing production efficiency.

[0021] Meanwhile, the current cooling method in cold rolling processes involves cooling water flowing through the center of the roller to lower its temperature. The metal roller of the cold rolling mill is designed with a hollow structure. The cooling system injects room-temperature cooling water from an inlet pipe at one end of the roller, allowing the water to circulate within the internal chambers and then exit from an outlet pipe at the other end. Theoretically, the heat absorbed by the roller surface should be transferred to the interior through thermal conduction via the metal walls and carried away by the flowing cooling water, thus achieving cooling. However, this cooling method suffers from significant conduction lag and regional limitations. Heat transfer from the roller surface (the outer layer directly in contact with the molten glass) to the center (the water flow channel) requires passing through multiple layers of metal walls. The thermal conductivity of metal is affected by thickness and temperature difference, resulting in most of the heat being carried away within the roller. The actual cooling effect on the roller surface is very limited, causing the actual surface temperature to remain in a high-temperature range. Under such high-temperature conditions, the metal on the roller surface reacts with oxygen in the air and free oxygen in the molten glass, forming a black metal oxide that adheres to the roller surface, creating an oxide layer. More importantly, this oxide layer is not completely tightly attached. During the continuous rotation of the drum and the squeezing of the molten glass, some loose oxide particles will rotate with the drum and embed themselves into the surface or interior of the molten glass that has not been completely cooled and shaped, forming visible black impurity spots. This directly reduces the light transmittance of the photovoltaic glass, damages the flatness of the glass surface, and causes stress concentration in the glass during subsequent crushing and forming processes. This significantly reduces its impact and bending mechanical strength, and may even cause the photovoltaic module to crack due to insufficient glass strength after installation.

[0022] Currently, the industry standard for treating the oxide layer on rollers involves mechanically grinding the surface to remove the black oxide layer. However, considering that the roller does not deform when extruding high-temperature molten glass, its wall thickness is limited, thus restricting the number of grinding operations. Furthermore, even if the existing oxide layer is removed, when the roller is put back into production and comes into contact with the high-temperature molten glass again, the high surface temperature will rapidly react with oxygen and oxygen elements in the molten glass to re-form a noticeable black oxide layer, increasing maintenance costs and requiring frequent production interruptions, thus reducing production efficiency. Simultaneously, the grinding process slightly increases the surface roughness of the roller, improving the adhesion rate of the high-temperature molten glass. Therefore, current processes cannot solve the oxide layer problem. To overcome these issues... Figure 1 This application illustrates a schematic diagram of the structure of a glass cold rolling apparatus provided in an exemplary embodiment. Figure 1 , Figure 2 This application illustrates a schematic diagram of the structure of a glass cold rolling apparatus provided in an exemplary embodiment. Figure 2 .like Figure 1 and Figure 2As shown, the glass cold rolling apparatus 100 provided in this embodiment includes a feeding unit 110, an extrusion unit 120, and a cooling unit 130. The feeding unit 110 is configured to introduce molten glass into the extrusion unit 120. In this case, the outlet of the feeding unit 110 corresponds to the inlet of the extrusion unit 120 to ensure that the molten glass flowing out of the outlet of the feeding unit 110 can be directionally introduced into the extrusion unit 120 for the next extrusion process.

[0023] like Figure 1 and Figure 2 As shown, the extrusion unit 120 is configured to correspond to the outlet of the feeding unit 110. The extrusion unit 120 is configured to receive the molten glass discharged from the feeding unit 110 and extrude it into a glass sheet. It should be understood that the corresponding configuration here means that the outlet of the feeding unit 110 is opposite to the inlet of the extrusion unit 120, so as to ensure that the extrusion unit 120 can receive the molten glass discharged from the feeding unit 110 and extrude it, so that the molten glass is formed into a glass sheet.

[0024] like Figure 1 and Figure 2 As shown, the cooling unit 130 is connected to the extrusion unit 120. The cooling unit 130 includes a gas pipeline 131 and a gas source (not shown) connected to the gas pipeline 131. The outlet of the gas pipeline 131 is located inside the extrusion unit 120 and is configured to blow high-pressure gas toward the non-working area of ​​the extrusion unit 120. The non-working area of ​​the extrusion unit 120 includes the area from the point where the extrusion unit 120 separates from the glass sheet until the next contact with the molten glass, i.e., the area that is not in contact with the molten glass or the glass sheet. By setting the cooling unit 130 to blow high-pressure gas into the extrusion unit 120 through the gas pipeline 131, the peeling residue on the surface of the extrusion unit 120 can be removed, and the temperature of the surface of the extrusion unit 120 can be reduced by air cooling.

[0025] Considering the high temperature inside the extrusion unit during glass processing, at least the portion of the gas pipeline located within the extrusion unit area is made of steel pipe (as shown in the branch pipeline below), while the gas pipeline located away from the extrusion unit area can be made of flexible hose (as shown in the main pipeline below). The connection method of combining flexible hose and steel pipe makes the equipment more flexible and avoids the risk of injury from high-pressure gas due to the easy damage of flexible hose near the high-temperature area.

[0026] In one example, the gas pipeline can be fixed to the target area of ​​the extrusion unit and the feeding unit by a pipeline bracket. It should be noted that the position and fixing method of the pipeline bracket are not limited here, as long as the effect of fixing the gas pipeline can be achieved.

[0027] The glass cold rolling apparatus provided in this application, by setting the gas outlet of the cooling unit's gas pipeline in the non-working area of ​​the extrusion unit—that is, the area from the glass sheet detachment point to the next contact with molten glass—and introducing high-pressure gas to purge in the non-working area, can blow off glass residue before it has been secondary compacted and is removed at a suitable temperature. This achieves targeted removal of residual glass on the roller surface, preventing it from entering the next extrusion cycle with the roller due to failure to clean it in time, causing repeated friction and resulting in an uneven roller surface. Furthermore, this application eliminates the need for manual intervention in the extrusion unit's working area, completely avoiding direct contact between personnel and high-temperature, high-speed equipment, reducing the occurrence of production accidents. Cleaning can be completed without stopping the machine, allowing the roller to operate continuously, reducing the unit glass production time cost and improving work efficiency.

[0028] Based on this, in this application, while the high-pressure gas is blowing away the residual glass, it can directly remove the surface heat through the airflow, reduce the surface temperature of the roller, inhibit the occurrence of oxidation reaction, and reduce the impact of the oxide layer on the glass.

[0029] In summary, the glass cold rolling apparatus provided in this application reduces equipment maintenance costs and glass defect rate by minimizing roller wear and oxide layer formation.

[0030] In some embodiments, such as Figure 1 and Figure 2 As shown, the feeding unit 110 includes a feeding trough 111, which has an inlet and an outlet. The outlet is correspondingly positioned to the extrusion unit 120. In one example, the feeding trough 111 can be made of heat-resistant alloy steel (such as 310S stainless steel), which can withstand the high-temperature corrosion of molten glass. The outlet of the feeding trough 111 corresponds to the inlet of the extrusion unit 120, meaning the width of the outlet is adapted to the length of the extrusion unit 120. Furthermore, the inner wall of the feeding trough 111 can be coated with a high-temperature resistant ceramic coating. This coating not only reduces the adhesion between the molten glass and the tank wall but also reduces the direct reaction between the molten glass and the metal tank, thus reducing the risk of impurity introduction.

[0031] In some embodiments, such as Figure 1 and Figure 2 As shown, the extrusion unit 120 includes at least two parallel, spaced-apart rollers 121. Each roller 121 is configured to rotate synchronously in opposite directions, and the gap between two adjacent rollers 121 forms an extrusion channel 1211. The extrusion channel 1211 is correspondingly arranged with the outlet of the feeding unit 110 and is used to receive molten glass and extrude it into shape. By synchronously driving the rollers 121 to work in conjunction with the cooling unit 130, not only is the glass sheet preparation efficiency guaranteed, but also residual glass wear and high-temperature oxidation are reduced, thereby improving the continuous working capacity of the glass cold rolling device 100 and the pass rate of glass products.

[0032] In one example, the extrusion unit includes two symmetrically arranged metal rollers, each fixed at both ends by high-temperature bearing seats. The two metal rollers are horizontally parallel and spaced apart, and can be driven by a drive motor to achieve synchronous counter-rotation. The dimensions of the extrusion channels of the two metal rollers can be dynamically adjusted by an adjustment mechanism. For example, the axial spacing can be adjusted by an external drive mechanism (such as a servo motor + lead screw assembly) to accommodate the forming requirements of glass sheets of different thicknesses. The dimensions of the rollers can be designed according to the production requirements of photovoltaic glass and are not limited here. After the molten glass enters through the extrusion channel between the two metal rollers, it is extruded into a glass sheet of a preset thickness and moves in the discharge direction with the rotation of the rollers, eventually detaching from the roller surface under the action of gravity.

[0033] In some embodiments, such as Figure 1 and Figure 2 As shown, the roller 121 has an internal cavity. The gas pipeline 131 includes a main pipeline 1311 and at least two branch pipelines 1312. The outlet of the main pipeline 1311 is connected to the inlet of the at least two branch pipelines 1312, and the outlet of at least each branch pipeline 1312 is located within the cavity of the corresponding roller 121. By providing branch pipelines 1312 within the cavity of each roller 121, and with the outlet of each branch pipeline 1312 located within its corresponding cavity, high-pressure gas is continuously blown from the outlet, thereby removing the peeling residue adhering to the surface of the roller 121 and cleaning the surface of the roller 121. It should be noted that when there is only one outlet, the outlet is located in the central area of ​​the roller 121.

[0034] In one example Figure 3 A schematic diagram of the structure of a tee pipe provided in an exemplary embodiment of this application is shown. Figures 1-3 As shown, the main pipeline 1311 can be connected to two branch pipelines 1312 via a T-connector 1313, so that the gas in the main pipeline 1311 can be introduced into the two branch pipelines 1312 respectively. When the high-pressure gas enters the cavity of the roller 121 from the outlet of the branch pipeline 1312, since the outlet of the branch pipeline 1312 blows towards the non-working area, the high-pressure gas blown out from the outlet continuously blows the non-working area, so that the glass residue in the non-working area of ​​the roller 121 is removed before it comes into contact with the molten glass again, thus avoiding damage to the surface of the roller 121 by the glass residue.

[0035] In some embodiments, such as Figure 1 and Figure 2As shown, each branch pipe 1312 extends into the cavity of the corresponding roller 121, and the extension direction of each branch pipe 1312 is the same as the extension direction of the corresponding roller 121. Each branch pipe 1312 includes multiple air outlets, which purge high-pressure gas towards the non-working area. Since the branch pipe 1312 extends into the cavity and its extension direction is the same as that of the roller 121, by providing multiple air outlets, the occurrence of purging blind spots can be avoided, thereby improving the service life of the roller 121.

[0036] In one example, the roller may include end caps, meaning that both ends of the roller are sealed by end caps, and branch pipes can extend into the cavity of the roller through the end caps. Multiple air outlets are distributed in the area where the branch pipes extend into the cavity of the roller, and these outlets are spaced apart along the extension direction of the roller to ensure the effectiveness of high-pressure gas purging and avoid the occurrence of purging blind spots.

[0037] In some embodiments, such as Figure 1 and Figure 2 As shown, the multiple air outlets are arranged at intervals along the circumference of the branch pipe 1312, with each outlet blowing on a different area of ​​the roller 121. The multiple air outlets are arranged at intervals along the circumference of the branch pipe 1312 to ensure that the entire non-working area can be completely covered by the high-pressure gas sprayed from the air outlets, ensuring the effective removal of glass residue from the surface of the roller 121.

[0038] In one example, since the glass residue attached to the initial area where the glass sheet just begins to separate from the roller has not completely cooled and has a high viscosity, the peeling residue in the intermediate transition area is in a semi-solid state with a lower viscosity, and the glass residue in the end area is in a solidified state and is less numerous, gas flow regulating valves can be set at different gas outlets to control the intensity of the high-pressure gas sprayed from the outlets corresponding to the initial area to be the highest, the intermediate transition area to be the second highest, and the end area to be the lowest. This can improve the cleaning efficiency while reducing production costs.

[0039] In some embodiments, such as Figure 1 and Figure 2 As shown, the multiple air outlets are arranged along the same straight line on the branch pipe 1312. Each branch pipe 1312 also includes multiple nozzles (not shown in the figure), which are respectively set on the corresponding air outlets. The multiple nozzles have different spray angles. By adjusting the nozzle angles, the multiple nozzles can have different spray angles to ensure that the high-pressure gas sprayed by the multiple nozzles can cover the entire non-working area, thereby ensuring the efficiency of glass residue removal.

[0040] In one example, when multiple air outlets are distributed in the same straight direction, i.e., arranged in a straight line along the length of the drum, a nozzle can be fixed at each air outlet. The nozzles can be made of high-temperature resistant ceramic material, and the angles of the multiple nozzles can be differentiated based on the axis of the branch pipeline to ensure no blind spots in the purging process. At the same time, the outlet cross-section of each nozzle can be set to be flat to form a fan-shaped spray area, thereby increasing the impact force. The fan-shaped areas of adjacent nozzles should at least partially overlap to ensure no blind spots in the purging process along the drum axis.

[0041] In some embodiments, such as Figure 1 and Figure 2 As shown, the cooling unit 130 also includes a control valve (not shown in the figure). The control valve is located on the main pipeline 1311 and is configured to regulate the flow of high-pressure gas into each branch pipeline 1312. By setting the control valve, it is possible to determine whether to introduce high-pressure gas into the gas pipeline 131 according to actual conditions, thereby reducing costs.

[0042] In some embodiments, such as Figure 1 and Figure 2 As shown, the high-pressure gas provided by the gas source is an inert gas. By introducing inert gas into the roller 121, the contact area between the roller 121 and the air is reduced, thereby reducing the degree of oxidation of the roller 121.

[0043] In some embodiments, such as Figure 1 and Figure 2 As shown, the glass cold rolling apparatus 100 also includes a waste collection unit (not shown in the figure), which is disposed opposite to the extrusion unit 120. In one example, the waste collection unit may be located below the roller 121 included in the extrusion unit 120 to receive glass sheets and glass residue particles.

[0044] When the glass cold rolling apparatus provided in this application embodiment is used to process molten glass, the specific operation process is as follows: First, connect the steel pipe, which serves as a branch pipe, to the flexible hose, which serves as the main pipe, ensuring a sealed interface. Then, use screws to fix the feed chute in the middle of the two rollers, ensuring that the feed chute outlet is precisely aligned with the extrusion channel between the two rollers. Next, fix the steel pipe with the fixed brackets on both sides of the feed chute and tighten it with bolts, while ensuring that the extension direction of the steel pipe is consistent with the roller axis to avoid pipeline interference when the rollers rotate later.

[0045] After completing the above assembly, open the high-pressure gas control valve to perform an airtightness test, observing whether there are any leaks at the connection interfaces between the steel pipe and the hose, and at the fixing points between the steel pipe and the support. If no leaks are detected, the cold rolling mill can be started, and the high-pressure gas control valve can be opened simultaneously to preheat and purge the non-working areas of the roller (purge time 10 seconds) to remove impurities from the roller surface in advance, and to initially reduce the roller temperature using high-pressure gas, preparing for subsequent glass melt extrusion.

[0046] After the purging is completed, the high-temperature molten glass is slowly introduced into the extrusion channel between the two rollers through the feed trough. After the glass is extruded by the synchronous reverse rotation of the rollers, it is formed into a solid glass sheet. After the glass sheet rotates with the rollers to the release point, it falls naturally into the receiving tray below the rollers.

[0047] Once the current batch of glass has been cold-rolled, the next batch of glass can be cold-rolled after the receiving tray is replaced or wiped. It should be noted that throughout the entire operation of the glass cold-rolling unit (from the start of preheating and purging until all batches are completed), the high-pressure gas control valve must remain open to ensure that the non-working areas of the rollers are always effectively purged and cooled, preventing glass residue buildup or roller overheating.

[0048] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0049] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A glass cold rolling apparatus, characterized in that, include: A feeding unit configured to introduce molten glass into an extrusion unit; An extrusion unit is provided, which is corresponding to the outlet of the feeding unit. The extrusion unit is configured to receive the molten glass discharged from the feeding unit and extrude it into a glass sheet. A cooling unit is connected to the extrusion unit. The cooling unit includes a gas pipeline and a gas source connected to the gas pipeline. The gas outlet of the gas pipeline is located inside the extrusion unit and configured to blow high-pressure gas toward the non-working area of ​​the extrusion unit. The non-working area of ​​the extrusion unit includes the area from the point where the extrusion unit detaches from the glass sheet to the next contact with the molten glass.

2. The glass cold rolling apparatus according to claim 1, characterized in that, The feeding unit includes a feeding trough, which includes an inlet and an outlet, and the outlet is correspondingly provided with the extrusion unit.

3. The glass cold rolling apparatus according to claim 1, characterized in that, The extrusion unit includes at least two parallel and spaced rollers, each roller is configured to rotate synchronously in opposite directions, and the gap between two adjacent rollers forms an extrusion channel, which is corresponding to the discharge port of the feeding unit.

4. The glass cold rolling apparatus according to claim 3, characterized in that, The drum has an internal cavity, and the gas pipeline includes a main pipeline and at least two branch pipelines. The outlet of the main pipeline is connected to the inlet of the at least two branch pipelines, and the outlet of at least each branch pipeline is located in the cavity of the corresponding drum.

5. The glass cold rolling apparatus according to claim 4, characterized in that, Each of the branch pipes extends into the cavity of the corresponding roller, and the extension direction of each branch pipe is the same as the extension direction of the corresponding roller. Each branch pipe includes multiple air outlets, which purge high-pressure gas toward the non-working area.

6. The glass cold rolling apparatus according to claim 5, characterized in that, The plurality of air outlets are arranged at circumferential intervals along the branch pipe, and each air outlet blows a different area of ​​the roller.

7. The glass cold rolling apparatus according to claim 5, characterized in that, The multiple air outlets are arranged along the same straight line on the branch pipes, and each branch pipe also includes multiple nozzles, which are respectively disposed on the corresponding air outlets, and the multiple nozzles have different spray angles.

8. The glass cold rolling apparatus according to claim 4, characterized in that, The cooling unit also includes a control valve disposed on the main pipeline and configured to regulate the flow of high-pressure gas into each of the branch pipelines.

9. The glass cold rolling apparatus according to any one of claims 1-8, characterized in that, The high-pressure gas provided by the gas source is an inert gas.

10. The glass cold rolling apparatus according to claim 1, characterized in that, The glass cold rolling apparatus also includes a waste collection unit, which is arranged opposite to the extrusion unit.

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