Calendering molding device and glass production line

Abstract

The present disclosure relates to the technical field of glass production. Disclosed are a calendering molding device and a glass production line. The calendering molding device comprises a rack, and a glass melt flow channel, a conveying hopper and a calendering roller pair that are arranged on the rack. The conveying hopper extends in the horizontal direction and is provided with a feeding port and a discharging port opposite to each other; the feeding port is in communication with the glass melt flow channel, the calendering roller pair has a roller pair gap, and the roller pair gap is arranged in a discharging direction of the discharging port. The conveying hopper is configured to convey a glass melt flowing out of the glass melt flow channel to the roller pair gap in the horizontal direction, and the calendering roller pair is configured to perform calendering molding on the glass melt to form a glass ribbon. The calendering molding device provided by the present disclosure can improve the uniformity of the flow rate of the glass melt, ensuring the uniform thickness of the calendering-molded glass ribbon, improving product quality.

Description

A calendering forming device and a glass production line

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 2024102493702, filed with the Patent Office of China on March 5, 2024, entitled “A calendering forming device and a glass production line,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the technical field of glass production, and in particular to a calendering forming device and a glass production line. Background Art

[0004] At present, in the production process of microcrystalline glass, a vertical downstream method is generally adopted to realize the feeding of molten glass and the calendering of glass ribbon, wherein the molten glass flow channel, the conveying hopper and the calendering rollers are arranged in sequence from top to bottom in the vertical direction. The molten glass flowing out of the molten glass flow channel enters the conveying hopper at a certain height difference, so that a certain liquid level of molten glass accumulates in the conveying hopper. Under the work of gravity, the molten glass flows out through the discharge gap at the bottom of the conveying hopper to the calendering rollers to realize the feeding function of the molten glass. Thereafter, the molten glass is formed into a glass ribbon under the action of the calendering rollers to realize the calendering forming function of the glass ribbon.

[0005] However, in the process of the glass melt flowing vertically, due to the influence of gravity, the flow rate of the glass melt at the position corresponding to the outlet of the glass melt flow channel in the conveying hopper (generally the middle position in the width direction of the conveying hopper) is faster, while the flow rate of the glass melt at other positions is slower, resulting in uneven flow rate of the glass melt, thereby making the thickness of the rolled glass ribbon uneven, affecting product quality.

[0006] In view of this, it is particularly important to design and manufacture a rolling forming device and a glass production line that can ensure a uniform flow rate of the glass melt, especially in glass production. Summary of the Invention

[0007] The purpose of the present disclosure is to provide a rolling forming device that can improve the uniformity of the flow rate of molten glass, ensure the uniform thickness of the rolled glass ribbon, and improve product quality.

[0008] Another object of the present disclosure is to provide a glass production line that can improve the uniformity of the flow rate of the molten glass, ensure the uniform thickness of the rolled glass ribbon, and improve product quality.

[0009] The present disclosure is implemented by adopting the following technical solutions.

[0010] A rolling forming device includes a frame and a glass melt flow channel, a conveying hopper and a rolling roller pair installed on the frame. The conveying hopper is extended in the horizontal direction and has a feed port and a discharge port arranged opposite to each other. The feed port is connected to the glass melt flow channel. The rolling roller pair has a roller gap, and the roller gap is set in the discharge direction of the discharge port. The conveying hopper is configured to convey the glass melt flowing out of the glass melt flow channel to the roller gap in the horizontal direction. The rolling roller pair is configured to roll the glass melt to form a glass ribbon.

[0011] Optionally, the conveying hopper includes a top wall, a first side wall, a bottom wall and a second side wall. The top wall, the first side wall, the bottom wall and the second side wall are connected end to end and together form a feed port and a discharge port. The bottom wall is arranged on a horizontal plane, and the top wall is inclined to the bottom wall and forms a first preset angle with the bottom wall. The range of the first preset angle is 30 degrees to 60 degrees.

[0012] Optionally, the calendering roller pair includes a first calendering roller and a second calendering roller, the first calendering roller and the second calendering roller are arranged in parallel and spaced apart, and together form a gap between the rollers, the first calendering roller is arranged below the bottom wall, the projection of the axis of the first calendering roller on the plane where the bottom wall is located is located on the bottom wall, and the second calendering roller is arranged obliquely above the first calendering roller.

[0013] Optionally, a second preset angle is formed between the midline of the first preset angle and the line connecting the axis of the first calendering roller and the axis of the second calendering roller, and the range of the second preset angle is 30 degrees to 60 degrees.

[0014] Optionally, the outer diameter of the first calendering roller first decreases and then increases in the axial direction of the first calendering roller, and the outer diameter of the second calendering roller first decreases and then increases in the axial direction of the second calendering roller.

[0015] Optionally, the difference between the maximum outer diameter and the minimum outer diameter of the first calendering roller ranges from 0.05 mm to 0.1 mm, and the difference between the maximum outer diameter and the minimum outer diameter of the second calendering roller ranges from 0.05 mm to 0.1 mm.

[0016] Optionally, the conveying hopper is made of metal material, a positive electrode connecting piece is provided on the outside of the first side wall, and a negative electrode connecting piece is provided on the outside of the second side wall. Both the positive electrode connecting piece and the negative electrode connecting piece are configured to be connected to electricity so that the conveying hopper is energized and heated.

[0017] Optionally, the conveying hopper further includes a first resistor group, which is attached to the outside of the top wall, and the resistance value of the first resistor group first increases and then decreases along the width direction of the top wall.

[0018] Optionally, the first resistor group includes a first resistor and two second resistors, the resistance of the first resistor is greater than the resistance of the second resistor, the first resistor and the two second resistors are all attached to the outside of the top wall, and one second resistor, the first resistor and the other second resistor are arranged in sequence along the width direction of the top wall.

[0019] Optionally, the conveying hopper further includes a second resistor group, which is attached to the outside of the bottom wall, and the resistance value of the second resistor group first increases and then decreases along the width direction of the bottom wall.

[0020] Optionally, the second resistor sheet group includes a fourth resistor sheet and two fifth resistor sheets, the resistance of the fourth resistor sheet is greater than the resistance of the fifth resistor sheet, the fourth resistor sheet and the two fifth resistor sheets are all attached to the outside of the bottom wall, and one fifth resistor sheet, the fourth resistor sheet and another fifth resistor sheet are arranged in sequence along the width direction of the bottom wall.

[0021] Optionally, the discharge port and the gap between the rollers are spaced apart to form a buffer space between the discharge port and the gap between the rollers.

[0022] Optionally, the calendering molding device also includes a first insulation shell and a second insulation shell, the first insulation shell and the second insulation shell are arranged in a close relationship and are both installed on the frame, the first insulation shell cover is arranged outside the conveying hopper, and the second insulation shell cover is arranged outside the glass melt flow channel, and the first insulation shell is provided with a clearance gap, and the clearance gap is configured to make way for the calendering rollers.

[0023] Optionally, the conveying hopper is provided with a hanging ring, and a hook is provided in the first insulation shell, and the hook is connected to the hanging ring.

[0024] Optionally, the calendering forming device also includes a steering roller, a transition roller and an annealing furnace installed on the frame, the steering roller is arranged below the calendering roller, the transition roller is arranged between the steering roller and the annealing furnace, the steering roller is configured to adjust the conveying direction of the glass ribbon, and the transition roller is configured to convey the glass ribbon output from the steering roller to the annealing furnace.

[0025] Optionally, there are multiple transition rollers, which are arranged in parallel and spaced apart, and the line connecting the axes of the multiple transition rollers remains horizontal or tilted upward in the conveying direction of the glass ribbon, and a third preset angle is formed between the line connecting the axes of the multiple transition rollers and the horizontal plane, and the range of the third preset angle is 0 to 10 degrees.

[0026] Optionally, the calendering forming device also includes a first heating and heat-insulating component and a second heating and heat-insulating component installed on the frame, the first heating and heat-insulating component is arranged between the calendering roller and the steering roller, the second heating and heat-insulating component is arranged between the steering roller and the annealing furnace, and the cover is arranged outside the transition roller, the first heating and heat-insulating component and the second heating and heat-insulating component are both configured to heat and insulate the glass ribbon.

[0027] Optionally, both the first heating and heat-insulating component and the second heating and heat-insulating component are heated by electric heating.

[0028] A glass production line includes the above-mentioned calendering and forming device, which includes a frame and a glass melt flow channel, a conveying hopper and a calendering pair of rollers installed on the frame. The conveying hopper is extended in the horizontal direction and has a feed port and a discharge port arranged opposite to each other. The feed port is connected to the glass melt flow channel. The calendering pair of rollers has a roller gap, and the roller gap is arranged in the discharge direction of the discharge port. The conveying hopper is configured to convey the glass melt flowing out of the glass melt flow channel to the roller gap in the horizontal direction. The calendering pair of rollers is configured to calender the glass melt to form a glass ribbon.

[0029] Optionally, the glass production line further includes a feeding device connected to the glass melt flow channel, configured to produce glass melt, and input the glass melt into the glass melt flow channel.

[0030] The calendering forming device and glass production line provided by the present disclosure have the following beneficial effects:

[0031] The calendering and forming device provided by the present disclosure has a conveying hopper extending horizontally and having a feed port and a discharge port disposed opposite each other. The feed port is connected to a glass melt flow channel. The calendering rollers have a gap between the rollers, and the gap between the rollers is arranged in the discharge direction of the discharge port. The conveying hopper is configured to convey the glass melt flowing from the glass melt flow channel horizontally to the gap between the rollers. The calendering rollers are configured to calender the glass melt to form a glass ribbon. Compared with the related art, the calendering and forming device provided by the present disclosure, due to the use of a conveying hopper extending horizontally, a glass melt flow channel connected to the feed port, and a gap between the rollers connected to the discharge port, can improve the uniformity of the glass melt flow rate, ensure the uniform thickness of the calendered glass ribbon, and improve product quality.

[0032] The glass production line provided by the present disclosure includes a calendering and forming device, which can improve the uniformity of the flow rate of the molten glass, ensure the uniform thickness of the calendered glass ribbon, and improve product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0034] FIG1 is a schematic structural diagram of a calendering forming device provided in an embodiment of the present disclosure;

[0035] FIG2 is a schematic structural diagram of a calendering device provided by an embodiment of the present disclosure, in which a conveying hopper, a calendering roller pair, a steering roller, and an annealing furnace are sequentially arranged along the feeding direction;

[0036] FIG3 is a schematic structural diagram of the cooperation between the conveying hopper and the calendering rollers in the calendering forming device provided in an embodiment of the present disclosure;

[0037] FIG4 is a mathematical model diagram of the cooperation between the conveying hopper and the calendering rollers in the calendering forming device provided by an embodiment of the present disclosure;

[0038] FIG5 is a schematic structural diagram of a conveying hopper in a calendering forming device provided in an embodiment of the present disclosure from one perspective;

[0039] FIG6 is a schematic structural diagram of a conveying hopper in a calendering forming device provided in an embodiment of the present disclosure from another perspective;

[0040] FIG7 is a schematic structural diagram of a calendering roller pair in a calendering forming device provided in an embodiment of the present disclosure;

[0041] FIG8 is a schematic structural diagram of a first heat-insulating shell in a calendering molding device according to an embodiment of the present disclosure;

[0042] FIG9 is a schematic structural diagram of the coordination between the steering roller and the transition roller in the calendering forming device provided in an embodiment of the present disclosure.

[0043] Icons: 100-calendering molding device; 110-frame; 120-glass melt flow channel; 130-conveying hopper; 131-feeding port; 132-discharging port; 133-top wall; 134-first side wall; 1341-positive electrode connecting piece; 135-bottom wall; 136-second side wall; 1361-negative electrode connecting piece; 137-first resistor group; 1371-first resistor group; 1372-second resistor group; 1373-third resistor group; 138-second resistor group; 138 1-Fourth resistor; 1382-Fifth resistor; 1383-Sixth resistor; 139-Hanging ring; 140-Calendering rollers; 141-Gap between rollers; 142-First calendering roller; 143-Second calendering roller; 150-First insulation shell; 151-Gap; 160-Second insulation shell; 170-Turning roller; 180-Transition roller; 190-Annealing furnace; 200-First heating and insulation component; 210-Second heating and insulation component; 220-Cache space; 300-Glass ribbon. DETAILED DESCRIPTION

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, but not all of them. Generally, the components of the embodiments of the present disclosure described and shown in the drawings herein can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the present disclosure as claimed, but merely represents selected embodiments of the present disclosure. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present disclosure without creative effort shall fall within the scope of protection of the present disclosure.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0047] In the description of this disclosure, it should be noted that the terms "inside," "outside," "upper," "lower," and "horizontal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of this disclosure and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

[0048] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on the specific circumstances.

[0049] The following describes some embodiments of the present disclosure in detail with reference to the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0050] 1 , an embodiment of the present disclosure provides a glass production line (not shown) configured to produce glass products, which can improve the uniformity of the flow rate of the molten glass, ensure the uniform thickness of the rolled glass ribbon 300, and improve product quality.

[0051] It should be noted that the glass production line includes a feeding device (not shown) and a rolling and forming device 100. The feeding device is configured to feed material to the rolling and forming device 100 so that molten glass flows to the rolling and forming device 100; the rolling and forming device 100 is configured to roll and form the molten glass to obtain a glass ribbon 300. The rolling and forming device 100 is also configured to anneal the glass ribbon 300 to reduce the hardness of the glass ribbon 300, eliminate residual stress, stabilize the dimensions, reduce deformation and cracking tendencies, and ultimately obtain a glass product.

[0052] The calendering molding device 100 includes a frame 110, a glass melt flow channel 120, a conveying hopper 130, a calendering roller pair 140, a first insulation shell 150, a second insulation shell 160, a turning roller 170, a transition roller 180, an annealing furnace 190, a first heating and insulation component 200 and a second heating and insulation component 210. Among them, the glass melt flow channel 120, the conveying hopper 130, the calendering roller 140, the first insulation shell 150, the second insulation shell 160, the turning roller 170, the transition roller 180, the annealing furnace 190, the first heating and insulation component 200 and the second heating and insulation component 210 are all installed on the frame 110, and the frame 110 can carry and fix the glass melt flow channel 120, the conveying hopper 130, the calendering roller 140, the first insulation shell 150, the second insulation shell 160, the turning roller 170, the transition roller 180, the annealing furnace 190, the first heating and insulation component 200 and the second heating and insulation component 210.

[0053] Please refer to Figures 2 and 3. Specifically, the feeding device is connected to the glass melt flow channel 120. The feeding device is configured to produce glass melt and input the glass melt into the glass melt flow channel 120. The glass melt flow channel 120 is configured to feed the glass melt so that the glass melt enters the conveying hopper 130. The conveying hopper 130, the rolling roller pair 140, the steering roller 170, the transition roller 180 and the annealing furnace 190 are arranged in sequence along the feeding direction; the conveying hopper 130 is configured to buffer the glass melt and feed the glass melt into the roller gap 141 of the rolling roller pair 140; the rolling roller pair 140 is configured to roll the glass melt into a glass ribbon 300 and output the glass ribbon 300 from the roller gap 141; the steering roller 170 is configured to turn the glass ribbon 300 to adjust the traveling direction of the glass ribbon 300; the transition roller 180 is configured to pull the glass ribbon 300 so that the glass ribbon 300 can smoothly enter the annealing furnace 190; the annealing furnace 190 is configured to anneal the glass ribbon 300 to reduce the hardness of the glass ribbon 300 and eliminate residual stress.

[0054] In addition, the first insulation shell 150 is provided outside the conveying hopper 130, and the first insulation shell 150 is configured to insulate the conveying hopper 130; the second insulation shell 160 is provided outside the glass melt flow channel 120, and the second insulation shell 160 is configured to insulate the glass melt flow channel 120; the first heating and insulation component 200 is provided between the calendering roller pair 140 and the turning roller 170, and the first heating and insulation component 200 is configured to heat the glass ribbon 300 traveling between the calendering roller pair 140 and the turning roller 170, so as to keep it warm and ensure the subsequent annealing effect; the second heating and insulation component 210 is provided between the turning roller 170 and the annealing furnace 190, and is covered outside the transition roller 180, and the second heating and insulation component 210 is configured to heat the glass ribbon 300 traveling between the turning roller 170 and the annealing furnace 190, so as to keep it warm and ensure the subsequent annealing effect.

[0055] Optionally, the conveying hopper 130 is extended in a horizontal direction (the horizontal direction is not absolutely horizontal, and a certain angular error is allowed) so that the feeding direction of the glass melt in the conveying hopper 130 is horizontal. The conveying hopper 130 is a closed structure, and the conveying hopper 130 is relatively provided with a feed port 131 and a discharge port 132. The entire conveying hopper 130 has only the feed port 131 and the discharge port 132 for feeding and discharging the glass melt. The feed port 131 is connected to the glass melt flow channel 120, and the glass melt output from the glass melt flow channel 120 can enter the conveying hopper 130 through the feed port 131. The calendering rollers 140 have a roller gap 141, which is arranged in the discharge direction of the discharge port 131. The glass melt in the conveying hopper 130 can flow into the roller gap 141 through the discharge port 132. The area of ​​the feed port 131 can be set to be larger than the area of ​​the discharge port 132 to enable the conveying hopper 130 to buffer the molten glass. The area of ​​the feed port 131 can also be set to be smaller than the area of ​​the discharge port 132. The conveying hopper 130 can buffer the molten glass by simply adjusting the feed flow rate of the molten glass to be larger than the discharge flow rate. Specifically, the conveying hopper 130 is configured to horizontally convey the molten glass flowing from the molten glass flow channel 120 to the gap 141 between the rollers. The rolling rollers 140 are configured to roll and form the molten glass in the gap 141 to form the glass ribbon 300. As a result, during the process of feeding the molten glass into the conveying hopper 130, since the conveying hopper 130 extends horizontally, the molten glass therein flows forward not under the action of gravity, but rather under the pressure of the molten glass entering the conveying hopper 130 later. Therefore, the effect of gravity on the flow rate of the molten glass is minimal. Furthermore, since the pressure on the cross-section of the molten glass flow is equal everywhere, the flow rate of the molten glass is effectively improved, ensuring uniform thickness of the rolled glass ribbon 300 and improving product quality. In particular, for wide-sheet ultra-thin glass products, the method of using pressure to cause the molten glass to overflow horizontally in the present disclosure, compared to the method of using gravity to cause the molten glass to flow vertically downward in the related art, can ensure uniform flow rate at all locations of the molten glass as it flows out of the discharge port 132, ensuring uniform thickness of the rolled glass ribbon 300, thereby improving the flatness of the glass product and improving product quality.

[0056] In this embodiment, the discharge port 132 is flat and spaced apart from the gap 141 between the two rollers. A buffer space 220 is formed between the discharge port 132 and the gap 141 between the two rollers. The buffer space 220 is located between the rolling rollers 140. The rolling rollers 140 can limit and guide the molten glass in the buffer space 220 to prevent it from overflowing. Specifically, the molten glass flowing out of the discharge port 132 first enters the buffer space 220 and then enters the gap 141 between the two rollers. During this process, the buffer space 220 is configured to temporarily store the molten glass to increase the flow rate of the molten glass entering the gap 141 between the two rollers. In this way, on the one hand, it is possible to ensure that sufficient molten glass flows to the gap 141 between the rollers, thereby avoiding the situation where the rolling rollers 140 cannot extrude the glass ribbon 300 due to too little molten glass flow; on the other hand, by increasing the molten glass flow, the overall temperature of the molten glass in the buffer space 220 is guaranteed, thereby reducing the phenomenon of cold material appearing at the edge of the molten glass, thereby ensuring the calendering forming effect of the glass ribbon 300.

[0057] 4 to 7 , the conveying hopper 130 includes a top wall 133, a first side wall 134, a bottom wall 135, and a second side wall 136. The top wall 133, the first side wall 134, the bottom wall 135, and the second side wall 136 are connected end to end and together form a feed port 131 and a discharge port 132. The feed port 131 is provided at one end of the top wall 133, the first side wall 134, the bottom wall 135, and the second side wall 136, and the discharge port 132 is provided at the other end of the top wall 133, the first side wall 134, the bottom wall 135, and the second side wall 136. Specifically, the bottom wall 135 is arranged on a horizontal plane to ensure that the feeding direction of the glass melt is horizontal; the top wall 133 is arranged inclined to the bottom wall 135, and the distance between the end of the top wall 133 close to the feed port 131 and the bottom wall 135 is greater than the distance between the end of the top wall 133 close to the discharge port 132 and the bottom wall 135, to ensure that the area of ​​the feed port 131 is larger than the area of ​​the discharge port 132.

[0058] Optionally, a first preset angle is formed between the top wall 133 and the bottom wall 135. The first preset angle ranges from 30 degrees to 60 degrees. A reasonable range of the first preset angle can ensure a buffering effect while improving the smoothness and uniformity of the glass melt flow. In this embodiment, the first preset angle is 30 degrees, but is not limited to this. In other embodiments, the first preset angle can be 45 degrees or 60 degrees. The size of the first preset angle is not specifically limited.

[0059] In this embodiment, the top wall 133 , the first side wall 134 , the bottom wall 135 and the second side wall 136 are integrally formed to improve connection strength.

[0060] It is worth noting that the conveyor hopper 130 is made of a metal material and has a resistor inside. When powered, the resistor inside the conveyor hopper 130 can generate heat to heat the molten glass therein and prevent low-temperature crystallization of the molten glass. Specifically, a positive electrode connecting piece 1341 is provided on the outside of the first side wall 134, and a negative electrode connecting piece 1361 is provided on the outside of the second side wall 136. Both the positive electrode connecting piece 1341 and the negative electrode connecting piece 1361 are configured to be connected to electricity, so that the conveyor hopper 130 is powered and heated, thereby heating the molten glass inside the conveyor hopper 130 and maintaining it within a certain temperature range.

[0061] Optionally, the conveying hopper 130 further includes a first resistor group 137 and a second resistor group 138. The first resistor group 137 is attached to the outside of the top wall 133. When the conveying hopper 130 is powered on, the top wall 133 and the first resistor group 137 are simultaneously powered on and heated. The first resistor group 137 is configured to add resistors of different resistance values ​​at different locations on the top wall 133 to achieve zoned control of the heating temperature of the top wall 133. The second resistor group 138 is attached to the outside of the bottom wall 135. When the conveying hopper 130 is powered on, the bottom wall 135 and the second resistor group 138 are simultaneously powered on and heated. The second resistor group 138 is configured to add resistors of different resistance values ​​at different locations on the bottom wall 135 to achieve zoned control of the heating temperature of the bottom wall 135.

[0062] In this embodiment, the resistance of the first resistor group 137 first increases and then decreases along the width direction of the top wall 133, so that the resistance of the top wall 133 first increases and then decreases along its width direction. That is, along the width direction of the top wall 133, the resistance values ​​are smaller at the edges and larger at the center. As a result, when the conveying hopper 130 is powered on, the heat generated at the edges of the top wall 133 is greater and the heat generated at the center is less. Similarly, the resistance of the second resistor group 138 first increases and then decreases along the width direction of the bottom wall 135, so that the resistance of the bottom wall 135 first increases and then decreases along its width direction. That is, along the width direction of the bottom wall 135, the resistance values ​​are smaller at the edges and larger at the center. As a result, when the conveying hopper 130 is powered on, the heat generated at the edges of the bottom wall 135 is greater and the heat generated at the center is less.

[0063] The first resistor group 137 includes a first resistor 1371, two second resistors 1372, and two third resistors 1373. The resistance of the first resistor 1371 is greater than that of the second resistor 1372, and the resistance of the second resistor 1372 is greater than that of the third resistor 1373. The first resistor 1371 is arranged between the two second resistors 1372, and the two second resistors 1372 are arranged between the two third resistors 1373. The first resistor 1371, the two second resistors 1372 and the two third resistors 1373 are all attached to the outside of the top wall 133, and are all extended along the flow direction of the glass melt (the length direction of the top wall 133), that is, one third resistor 1373, one second resistor 1372, the first resistor 1371, another second resistor 1372 and another third resistor 1373 are arranged in sequence along the width direction of the top wall 133 (the extension direction of the discharge port 132). The length directions of the first resistor 1371, the second resistor 1372 and the third resistor 1373 are all the length directions of the top wall 133, and the width directions of the first resistor 1371, the second resistor 1372 and the third resistor 1373 are all the width directions of the top wall 133, and the two adjacent resistors are arranged close together. In this way, since the resistance of the first resistor 1371 is greater than the resistance of the second resistor 1372, and the resistance of the second resistor 1372 is greater than the resistance of the third resistor 1373, the resistance of the top wall 133 first increases and then decreases along its width direction, so that when the conveying hopper 130 is powered on, the heat generated at both sides of the top wall 133 is greater, and the heat generated in the middle is smaller.

[0064] The second resistor group 138 includes a fourth resistor 1381, two fifth resistors 1382, and two sixth resistors 1383. The resistance of the fourth resistor 1381 is greater than that of the fifth resistor 1382, and the resistance of the fifth resistor 1382 is greater than that of the sixth resistor 1383. The fourth resistor 1381 is arranged between the two fifth resistors 1382, and the two fifth resistors 1382 are both arranged between the two sixth resistors 1383. The fourth resistor 1381, the two fifth resistors 1382 and the two sixth resistors 1383 are all attached to the outside of the bottom wall 135, and are all extended along the flow direction of the glass melt (the length direction of the bottom wall 135), that is, one sixth resistor 1383, one fifth resistor 1382, the fourth resistor 1381, another fifth resistor 1382 and another sixth resistor 1383 are arranged in sequence along the width direction of the bottom wall 135 (the extension direction of the discharge port 132). The length directions of the fourth resistor 1381, the fifth resistor 1382 and the sixth resistor 1383 are all the length directions of the bottom wall 135, and the width directions of the fourth resistor 1381, the fifth resistor 1382 and the sixth resistor 1383 are all the width directions of the bottom wall 135, and the two adjacent resistors are arranged close together. In this way, since the resistance of the fourth resistor 1381 is greater than the resistance of the fifth resistor 1382, and the resistance of the fifth resistor 1382 is greater than the resistance of the sixth resistor 1383, the resistance of the bottom wall 135 first increases and then decreases along its width direction, so that the heat generated at both sides of the bottom wall 135 of the conveying hopper 130 is larger after power is turned on, and the heat generated in the middle position is smaller.

[0065] It should be noted that in the process of the glass melt flowing through the discharge port 132, the glass melt at the two side positions continuously exchanges heat with the first side wall 134 and the second side wall 136 respectively, resulting in the temperature of the glass melt at the two side positions decreasing faster, while the glass melt in the middle position has a slower temperature decrease rate because the heat is not easily dissipated. In this way, the glass melt at the discharge port 132 has a higher temperature in the middle and lower temperatures on both sides, resulting in uneven temperature in the middle and both sides of the glass melt and difficult to control, which can easily cause glass crystallization and the formation of an immobile layer, affecting the rolling effect of the glass melt. Therefore, in the present disclosure, the first resistor group 137 and the second resistor group 138 are used to add resistors of different resistance values ​​to different positions of the top wall 133 and the bottom wall 135, so that the heat generated at the positions on both sides of the top wall 133 and the bottom wall 135 is larger, and the heat generated at the middle position is smaller, so that the top wall 133 and the bottom wall 135 have a stronger heating effect on the positions on both sides of the glass melt and a weaker heating effect on the middle position of the glass melt, thereby balancing the temperature on both sides and the middle temperature of the glass melt, making the temperature of the glass melt uniform, and ensuring the subsequent rolling effect of the glass melt.

[0066] In this embodiment, the first resistor group 137 and the second resistor group 138 are both composed of five resistors, but are not limited to this. In other embodiments, the first resistor group 137 and the second resistor group 138 can both be composed of three resistors, or can both be composed of seven resistors. There is no specific limitation on the number of resistors in the first resistor group 137 and the second resistor group 138.

[0067] In this embodiment, the lengths and widths of the five resistors in the first resistor group 137 are the same, but the thicknesses are different, i.e., the thickness of the first resistor 1371 is greater than the thickness of the second resistor 1372, and the thickness of the second resistor 1372 is greater than the thickness of the third resistor 1373, so that the volume of the first resistor 1371 is greater than the volume of the second resistor 1372, and the volume of the second resistor 1372 is greater than the volume of the third resistor 1373, thereby making the resistance of the first resistor 1371 greater than the resistance of the second resistor 1372, and the resistance of the second resistor 1372 greater than the resistance of the third resistor 1373. Similarly, the lengths and widths of the five resistors in the second resistor group 138 are the same, but the thicknesses are different, i.e., the thickness of the fourth resistor 1381 is greater than the thickness of the fifth resistor 1382, and the thickness of the fifth resistor 1382 is greater than the thickness of the sixth resistor 1383, so that the volume of the fourth resistor 1381 is greater than the volume of the fifth resistor 1382, and the volume of the fifth resistor 1382 is greater than the volume of the sixth resistor 1383, thereby making the resistance of the fourth resistor 1381 greater than the resistance of the fifth resistor 1382, and the resistance of the fifth resistor 1382 greater than the resistance of the sixth resistor 1383.

[0068] However, this is not limited to this. In other embodiments, the widths of the five resistors in the first resistor group 137 may also be different. By adjusting the widths of each resistor in the first resistor group 137, the widths of the heating areas with different resistance values ​​on the top wall 133 can be controlled, thereby flexibly adjusting the range of zoned heating according to actual needs, and further improving the uniformity of the glass melt temperature. Similarly, the widths of the five resistors in the second resistor group 138 may also be different. By adjusting the widths of each resistor in the second resistor group 138, the widths of the heating areas with different resistance values ​​on the bottom wall 135 can be controlled, thereby flexibly adjusting the range of zoned heating according to actual needs, and further improving the uniformity of the glass melt temperature.

[0069] In this embodiment, a first resistor chip group 137 is attached to the outside of the top wall 133, and a second resistor chip group 138 is attached to the outside of the bottom wall 135. The first resistor chip group 137 and the second resistor chip group 138 work together to achieve uniform temperature regulation of the glass melt. However, this is not limiting. In other embodiments, only the first resistor chip group 137 can be attached to the outside of the top wall 133, or only the second resistor chip group 138 can be attached to the outside of the bottom wall 135, and uniform temperature regulation of the glass melt can also be achieved.

[0070] The rolling roller pair 140 includes a first rolling roller 142 and a second rolling roller 143. The first rolling roller 142 and the second rolling roller 143 are arranged parallel to each other and spaced apart, forming a gap 141 between the rolling rollers. The first rolling roller 142 and the second rolling roller 143 rotate toward each other to compress and stretch the molten glass entering the gap 141 to form a glass ribbon 300. Specifically, the first rolling roller 142 is disposed below the bottom wall 135, and the second rolling roller 143 is disposed obliquely above the first rolling roller 142. A buffer space 220 is located between the first rolling roller 142 and the second rolling roller 143. The molten glass flowing out of the discharge port 132 can flow onto the first rolling roller 142 and, as the first rolling roller 142 rotates, flow toward the gap 141. During this process, the molten glass accumulates in the buffer space 220 and forms a shoal, ensuring that the flow rate of the molten glass entering the gap 141 meets the required flow rate.

[0071] In this embodiment, the projection of the axis of the first calendering roller 142 on the plane where the bottom wall 135 is located is located on the bottom wall 135, that is, the axis of the first calendering roller 142 is located on the plane where the discharge port 132 is located, or the axis of the first calendering roller 142 is located on the side of the plane where the discharge port 132 is located close to the feed port 131. This ensures that the glass melt flowing out of the discharge port 132 will not flow down from the side of the first calendering roller 142 away from the second calendering roller 143 under the action of gravity, but will only flow toward the side close to the second calendering roller 143 (that is, toward the direction close to the gap 141 between the two rollers) under the driving action of the first calendering roller 142, thereby preventing leakage.

[0072] Optionally, a second preset angle is formed between the midline of the first preset angle and the line connecting the axis of the first rolling roller 142 and the axis of the second rolling roller 143. The molten glass flowing out of the discharge port 132 can flow into the gap 141 between the rollers at the second preset angle. The second preset angle ranges from 30 degrees to 60 degrees. A reasonable second preset angle can ensure smooth flow of the molten glass, prevent breakage of the glass ribbon 300 due to sudden angle changes after rolling, and improve safety. In this embodiment, the second preset angle is 45 degrees, but is not limited thereto. In other embodiments, the second preset angle can be 30 degrees or 60 degrees. The magnitude of the second preset angle is not specifically limited.

[0073] 4 , for ease of understanding, the first preset angle is represented as a, and the second preset angle is represented as b.

[0074] It should be noted that, under the joint action of the first resistor group 137 and the second resistor group 138, the top wall 133 and the bottom wall 135 have a stronger heating effect on the sides of the glass melt and a weaker heating effect on the middle of the glass melt. This may cause the temperature on both sides of the glass melt to be higher than the temperature in the middle of the glass melt. Since the temperature of the glass melt has a certain influence on the viscous resistance it encounters, the higher the temperature of the glass melt, the smaller the viscous resistance it encounters and the greater the flow rate. Therefore, the flow rate on both sides of the glass melt may be greater than the flow rate in the middle of the glass melt, which in turn causes the glass melt output from the discharge port 132 to be thick on both sides and thin in the middle. In order to ensure that the thickness of the rolled glass ribbon 300 is uniform, in the present disclosure, the outer surfaces of the first rolling roller 142 and the second rolling roller 143 are made into a concave shape, so that the outer diameter of the first rolling roller 142 first decreases and then increases in the axial direction of the first rolling roller 142, and the outer diameter of the second rolling roller 143 first decreases and then increases in the axial direction of the second rolling roller 143, that is, the outer diameters at both ends of the first rolling roller 142 are greater than the outer diameter of the middle part of the first rolling roller 142, and the outer diameters at both ends of the second rolling roller 143 are greater than the outer diameter of the middle part of the second rolling roller 143, so that in the process of rolling the glass melt into the glass ribbon 300, the two sides of the glass melt are thinned and the middle part of the glass melt is thickened, so that the thickness of the two sides and the middle part of the rolled glass ribbon 300 are consistent, and the uniformity is good.

[0075] Optionally, the shape of the first calendering roller 142 is the same as that of the second calendering roller 143. The difference between the maximum outer diameter and the minimum outer diameter of the first calendering roller 142 ranges from 0.05 mm to 0.1 mm. A reasonable difference between the maximum outer diameter and the minimum outer diameter of the first calendering roller 142 can further improve the thickness uniformity of the glass ribbon 300 and reduce thickness variations at various locations on the glass ribbon 300. Similarly, the difference between the maximum outer diameter and the minimum outer diameter of the second calendering roller 143 ranges from 0.05 mm to 0.1 mm. A reasonable difference between the maximum outer diameter and the minimum outer diameter of the second calendering roller 143 can further improve the thickness uniformity of the glass ribbon 300 and reduce thickness variations at various locations on the glass ribbon 300. In this embodiment, the difference between the maximum outer diameter and the minimum outer diameter of the first calendering roller 142 and the difference between the maximum outer diameter and the minimum outer diameter of the second calendering roller 143 are both 0.07 mm, but this is not limited to this. In other embodiments, the difference between the maximum outer diameter and the minimum outer diameter of the first calendering roller 142 and the difference between the maximum outer diameter and the minimum outer diameter of the second calendering roller 143 can both be 0.05 mm, or can both be 0.1 mm. There is no specific limitation on the difference between the maximum outer diameter and the minimum outer diameter of the first calendering roller 142 and the difference between the maximum outer diameter and the minimum outer diameter of the second calendering roller 143.

[0076] It is noteworthy that the first insulation shell 150 and the second insulation shell 160 are arranged in close contact with each other to enhance the insulation effect of the connection between the molten glass flow channel 120 and the conveying hopper 130. Referring to Figure 8, specifically, the first insulation shell 150 is provided with a clearance notch 151. The clearance notch 151 is arranged in an arc shape and is configured to make way for the first calendering roller 142 of the calendering roller pair 140. The first calendering roller 142 is partially disposed within the clearance notch 151 to ensure that the molten glass output from the discharge port 132 can accurately flow onto the first calendering roller 142, thereby passing through the buffer space 220 and entering the roller gap 141.

[0077] Continuing with FIG5 , in this embodiment, a hanging ring 139 is provided on the top wall 133 of the conveying hopper 130, and a hook (not shown) is provided within the first insulation shell 150. The hook is connected to the hanging ring 139. The first insulation shell 150 can limit the top wall 133 by the hook and the hanging ring 139, thereby fixing the position of the entire conveying hopper 130, preventing it from deforming, and ensuring stability and reliability. Specifically, there are multiple hooks and hanging rings 139, and multiple hanging rings 139 are arranged on the top wall 133 in a rectangular array, each hanging ring 139 being connected to a hook, so as to further enhance the limiting effect of the first insulation shell 150 on the conveying hopper 130.

[0078] Referring to Figure 9 , it should be noted that the steering roller 170 is disposed below the rolling roller pair 140 to ensure that the glass ribbon 300 between the rolling roller pair 140 and the steering roller 170 extends vertically, preventing warping. The transition roller 180 is disposed between the steering roller 170 and the annealing lehr 190 . The steering roller 170 is configured to adjust the conveying direction of the glass ribbon 300 and to convey the glass ribbon 300 from the steering roller 170 to the annealing lehr 190 .

[0079] Optionally, there are multiple transition rollers 180, each of which is arranged in parallel and spaced apart. The second heating and heat-insulating element 210 is simultaneously disposed over the plurality of transition rollers 180. The axis connecting the axes of the plurality of transition rollers 180 is horizontal or tilted upward in the conveying direction of the glass ribbon 300. The axis connecting the axes of the plurality of transition rollers 180 forms a third predetermined angle with the horizontal plane, and the third predetermined angle ranges from 0 to 10 degrees. When the third predetermined angle is 0 degrees, the axis connecting the axes of the plurality of transition rollers 180 is horizontal in the conveying direction of the glass ribbon 300. The plurality of transition rollers 180 work together to horizontally convey the glass ribbon 300 discharged from the turning roller 170 into the annealing lehr 190. When the third predetermined angle is greater than 0 degrees and less than or equal to 10 degrees, the axis connecting the axes of the plurality of transition rollers 180 is tilted upward in the conveying direction of the glass ribbon 300, which helps to thin the glass ribbon 300, improve the thickness uniformity of the glass ribbon 300, and prevent warping of the glass ribbon 300. In this embodiment, the third preset angle is 10 degrees, but is not limited thereto. In other embodiments, the third preset angle may be 0 degrees or 5 degrees, and the size of the third preset angle is not specifically limited.

[0080] For ease of understanding, the third preset angle is represented as c.

[0081] In this embodiment, the first insulation shell 150 and the second insulation shell 160 are both made of corundum mullite, the conveying hopper 130 is made of platinum, and the first heating and heat-insulating element 200 and the second heating and heat-insulating element 210 are both heated electrically. However, this is not limited to this embodiment. The first insulation shell 150 and the second insulation shell 160 can also be made of insulation cotton, and the conveying hopper 130 can also be made of other alloy materials. The materials of the first insulation shell 150, the second insulation shell 160, and the conveying hopper 130 are not specifically limited.

[0082] The calendering molding device 100 provided by the embodiment of the present disclosure has a conveying hopper 130 extending in the horizontal direction, and has a feed port 131 and a discharge port 132 arranged opposite to each other, the feed port 131 is connected to the glass melt flow channel 120, the calendering roller pair 140 has a roller gap 141, and the roller gap 141 is set in the discharge direction of the discharge port 132, the conveying hopper 130 is configured to convey the glass melt flowing out of the glass melt flow channel 120 to the roller gap 141 in the horizontal direction, and the calendering roller pair 140 is configured to calender the glass melt to form a glass ribbon 300. Compared to related technologies, the calendering device 100 provided herein utilizes a horizontally extending conveying hopper 130, a molten glass flow channel 120 communicating with a feed port 131, and a roller gap 141 communicating with a discharge port 132. This improves the uniformity of the molten glass flow rate, ensures uniform thickness of the calendered glass ribbon 300, and improves product quality. This results in a glass production line with high production efficiency, good production results, and a high yield rate.

[0083] The above are merely optional embodiments of the present disclosure and are not intended to limit the present disclosure. Those skilled in the art will readily appreciate that the present disclosure may be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, and the like made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure. Industrial Applicability

[0084] In summary, the purpose of the present disclosure is to provide a rolling forming device and a glass production line, which can improve the uniformity of the flow rate of the molten glass, ensure the uniform thickness of the rolled glass ribbon, and improve the product quality.

Claims

1. A calendering device, characterized in that: The machine comprises a frame and a glass melt flow channel, a conveying hopper and a rolling roller pair installed on the frame. The conveying hopper is extended in the horizontal direction and has a feed port and a discharge port arranged opposite to each other. The feed port is connected to the glass melt flow channel. The rolling roller pair has a roller gap, and the roller gap is arranged in the discharge direction of the discharge port. The conveying hopper is configured to convey the glass melt flowing out of the glass melt flow channel to the roller gap in the horizontal direction. The rolling roller pair is configured to roll the glass melt to form a glass ribbon.

2. The calendering device according to claim 1, characterized in that: The conveying hopper includes a top wall, a first side wall, a bottom wall and a second side wall. The top wall, the first side wall, the bottom wall and the second side wall are connected end to end and together form the feed port and the discharge port. The bottom wall is arranged on a horizontal plane, and the top wall is inclined to the bottom wall and forms a first preset angle with the bottom wall. The range of the first preset angle is 30 degrees to 60 degrees.

3. The calendering device according to claim 2, characterized in that: The calendering roller pair includes a first calendering roller and a second calendering roller. The first calendering roller and the second calendering roller are arranged in parallel and spaced apart from each other, and together form the gap between the rollers. The first calendering roller is arranged below the bottom wall, and the projection of the axis of the first calendering roller on the plane where the bottom wall is located is located on the bottom wall. The second calendering roller is arranged obliquely above the first calendering roller.

4. The calendering device according to claim 3, characterized in that: A second preset angle is formed between the midline of the first preset angle and the line connecting the axis of the first calendering roller and the axis of the second calendering roller. The range of the second preset angle is 30 degrees to 60 degrees.

5. The calendering device according to claim 3 or 4, characterized in that: The outer diameter of the first calendering roller first decreases and then increases in the axial direction of the first calendering roller, and the outer diameter of the second calendering roller first decreases and then increases in the axial direction of the second calendering roller.

6. The calendering device according to claim 5, characterized in that: The difference between the maximum outer diameter and the minimum outer diameter of the first calendering roller is in the range of 0.05 mm to 0.1 mm, and the difference between the maximum outer diameter and the minimum outer diameter of the second calendering roller is in the range of 0.05 mm to 0.1 mm.

7. The calendering device according to any one of claims 2 to 6, characterized in that: The conveying hopper is made of metal material, a positive electrode connecting piece is provided on the outside of the first side wall, and a negative electrode connecting piece is provided on the outside of the second side wall. The positive electrode connecting piece and the negative electrode connecting piece are both configured to be connected to electricity so that the conveying hopper is energized and heated.

8. The calendering device according to claim 7, characterized in that: The conveying hopper further includes a first resistor plate group, which is attached to the outside of the top wall. The resistance value of the first resistor plate group first increases and then decreases along the width direction of the top wall.

9. The calendering device according to claim 8, characterized in that: The first resistor sheet group includes a first resistor sheet and two second resistor sheets, the resistance of the first resistor sheet is greater than the resistance of the second resistor sheet, the first resistor sheet and the two second resistor sheets are all attached to the outside of the top wall, and one second resistor sheet, the first resistor sheet and the other second resistor sheet are arranged in sequence along the width direction of the top wall.

10. The calendering device according to any one of claims 7 to 9, characterized in that: The conveying hopper further includes a second resistor plate group, which is attached to the outside of the bottom wall. The resistance value of the second resistor plate group first increases and then decreases along the width direction of the bottom wall.

11. The calendering device according to claim 10, characterized in that: The second resistor sheet group includes a fourth resistor sheet and two fifth resistor sheets, the resistance of the fourth resistor sheet is greater than the resistance of the fifth resistor sheet, the fourth resistor sheet and the two fifth resistor sheets are all attached to the outside of the bottom wall, and one fifth resistor sheet, the fourth resistor sheet and the other fifth resistor sheet are arranged in sequence along the width direction of the bottom wall.

12. The calendering device according to any one of claims 1 to 11, characterized in that: The discharge port is spaced apart from the gap between the pair of rollers, and a buffer space is formed between the discharge port and the gap between the pair of rollers.

13. The calendering device according to any one of claims 1 to 12, characterized in that: The calendering molding device also includes a first insulation shell and a second insulation shell. The first insulation shell and the second insulation shell are arranged in a close relationship and are both installed on the frame. The first insulation shell cover is arranged outside the conveying hopper, and the second insulation shell cover is arranged outside the glass melt flow channel. The first insulation shell is provided with a clearance gap, and the clearance gap is configured to make way for the calendering rollers.

14. The calendering device according to claim 13, characterized in that: The conveying hopper is provided with a hanging ring, and a hook is provided in the first heat-insulating shell, and the hook is hung with the hanging ring.

15. The calendering device according to any one of claims 1 to 14, characterized in that: The calendering forming device also includes a steering roller, a transition roller and an annealing furnace installed on the frame, the steering roller is arranged below the calendering roller pair, the transition roller is arranged between the steering roller and the annealing furnace, the steering roller is configured to adjust the conveying direction of the glass ribbon, and the transition roller is configured to convey the glass ribbon output from the steering roller to the annealing furnace.

16. The calendering device according to claim 15, characterized in that: There are multiple transition rollers, which are arranged in parallel and spaced apart. The line connecting the axes of the multiple transition rollers remains horizontal or tilted upward in the conveying direction of the glass ribbon. A third preset angle is formed between the line connecting the axes of the multiple transition rollers and the horizontal plane. The range of the third preset angle is 0 to 10 degrees.

17. The calendering device according to claim 15 or 16, characterized in that: The calendering forming device also includes a first heating and heat-insulating component and a second heating and heat-insulating component installed on the frame, the first heating and heat-insulating component is arranged between the calendering roller pair and the steering roller, the second heating and heat-insulating component is arranged between the steering roller and the annealing furnace, and the cover is arranged outside the transition roller, the first heating and heat-insulating component and the second heating and heat-insulating component are both configured to heat and insulate the glass ribbon.

18. The calendering device according to any one of claims 15 to 17, characterized in that: The first heating and heat-insulating component and the second heating and heat-insulating component are both heated by electric heating.

19. A glass production line, characterized in that: It comprises the calendering forming device according to any one of claims 1 to 18.

20. The glass production line according to claim 19, characterized in that: The glass production line further includes a feeding device connected to the glass melt flow channel, configured to produce glass melt and feed the glass melt into the glass melt flow channel.

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