An apparatus for secondary drawing of glass sheets

Abstract

The utility model discloses a kind of devices of secondary drawing glass sheet, put into the accommodation cavity by the inlet of prefabricated block glass, make block glass melt into liquid state by heating piece, glass liquid is automatically flowed downward from discharge port under the action of gravity, after calendering mechanism, extruded into sheet glass;The device takes block glass as raw material, the material quality and performance requirement of heating furnace and calendering mechanism is lower, energy consumption is also smaller, and melting block glass also does not need to experience decomposition, complex reaction such as combination, melting process is simple, discharging speed is fast;Block glass can be provided by supplier, even homemade is also lower than the difficulty of directly forming sheet glass, forming is simple and efficient, can be obtained by ordinary heating furnace and forming equipment;Therefore, the utility model can effectively solve the problem that the difficulty of sheet glass manufacturing is greater at present, is favorable for reducing sheet glass manufacturing difficulty and cost, improve manufacturing efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of glass manufacturing in chemistry, and specifically relates to an apparatus for secondary glass sheet drawing. Background Technology

[0002] In the glass manufacturing industry, glass forming methods include float glass, rolling, and overflow drawing. Currently, thin glass sheets are mostly formed through rolling and overflow drawing. The forming process generally begins by heating and melting the batch materials in a glass furnace to obtain molten glass. Then, the molten glass is transported to the rolling and drawing areas through a feeding device. Finally, the molten glass is squeezed or drawn and cooled to form glass sheets. To ensure a more uniform molten glass, prevent crystallization during glass sheet formation, and guarantee the forming quality of the glass sheets, the above forming process places high demands on the control of parameters such as molten glass temperature and flow rate, as well as the performance and materials of the equipment. For example, to accurately control the temperature of the molten glass during feeding, it is necessary to use a feeding device for the glass rolling method disclosed in Chinese Patent CN221940314U, or a discharge device and glass production equipment disclosed in Chinese Patent CN117819803A. This results in a relatively complex and costly forming process for thin glass sheets. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a device for secondary glass sheet drawing, which solves the technical problem of the difficulty in manufacturing thin glass sheets and achieves the effect of reducing the difficulty and cost of manufacturing thin glass sheets.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A device for secondary glass sheet drawing includes a heating furnace and a rolling mechanism. The heating furnace includes an outer shell and a furnace body, with the furnace body located inside the outer shell. The furnace body has a receiving cavity for placing bulk glass. The upper end of the heating furnace has an inlet that is vertically connected to the receiving cavity, and the lower end has an outlet that is vertically connected to the receiving cavity. The size of the inlet is larger than the cross-sectional size of the bulk glass, and the size of the outlet is smaller than the cross-sectional size of the bulk glass. Heating elements for heating the receiving cavity are provided inside the heating furnace outside the receiving cavity. Multiple heating elements are provided and are symmetrically distributed on both sides of the receiving cavity through the outer shell. The rolling mechanism is located below the heating furnace and directly opposite the outlet. The rolling mechanism is used to extrude the molten glass flowing out of the outlet into thin glass sheets.

[0005] Furthermore, the accommodating cavity is provided with multiple partitions to form multiple cavities. The discharge port is vertically connected to the cavity located in the middle, and there are multiple inlet ports that are connected to each cavity accordingly. The lower end of the partition is spaced from the bottom surface of the accommodating cavity, and the lower ends of adjacent cavities are horizontally connected.

[0006] Furthermore, the cavity extends vertically and has a rectangular cross-section, with each cavity distributed along its own width direction, and the cross-sectional dimensions of the cavity are adapted to the cross-sectional dimensions of the block glass.

[0007] Furthermore, each cavity is provided with multiple heating elements, which are symmetrically distributed on both sides of the cavity width direction, with each heating element on the same side being vertically distributed.

[0008] Furthermore, the heating element is a silicon molybdenum rod, and the axial direction of the silicon molybdenum rod corresponds to the length direction of the cavity cross-section.

[0009] Furthermore, the device for secondary glass sheet drawing also includes a heat preservation furnace connected below the heating furnace, a rolling mechanism located inside the heat preservation furnace, a clearance opening on the upper end of the heat preservation furnace that is directly opposite to the discharge port and of a suitable size, and a forming port for thin glass sheets to pass through at the lower end of the heat preservation furnace.

[0010] Furthermore, the calendering mechanism includes a calendering assembly, which includes two calendering rolls spaced apart. The direction of the spaced-apart distribution corresponds to the width direction of the cross-section of the receiving cavity, and the axial direction of the calendering rolls corresponds to the length direction of the cross-section of the receiving cavity. An extrusion channel is formed between the two calendering rolls. Furthermore, there are multiple calendering assemblies arranged vertically, and the width of the extrusion channel in each calendering assembly decreases sequentially from top to bottom.

[0011] Furthermore, the calendering mechanism also includes an edge-pulling assembly, which is located below the calendering assembly and on one side of the extrusion channel width direction. The edge-pulling assembly includes two edge-pulling rollers located at both ends of the extrusion channel length direction, respectively. The axial direction of the edge-pulling rollers corresponds to the axial direction of the calendering rollers, and the edge-pulling rollers are used to laterally stretch the thin glass sheet.

[0012] Furthermore, the roller surface of the edge-pulling roller has anti-slip teeth.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The device for secondary glass sheet drawing described in this utility model has a heating furnace with a receiving cavity for placing block glass. Block glass is used as raw material. The block glass is heated and melted into molten glass by a heating element. The molten glass flows out from the discharge port under gravity and is extruded into thin glass sheets by a rolling mechanism. The temperature required to melt the block glass is relatively low, and the control requirements for parameters such as temperature and flow rate during the forming process are also lower compared to directly forming sheet glass. This can effectively solve the current problem of the difficulty in manufacturing thin glass sheets, and is conducive to reducing the difficulty and cost of manufacturing thin glass sheets and improving manufacturing efficiency.

[0014] 2. The device for secondary glass sheet drawing described in this utility model has a heat preservation furnace set below the heating furnace, and the rolling mechanism is placed in the heat preservation furnace. The heat preservation furnace provides a certain heating and heat preservation effect for the molten glass flowing out from the discharge port and passing through the rolling mechanism, ensuring that the molten glass still has good fluidity when it is rolled, so that the rolling mechanism can smoothly roll the molten glass into thin glass sheets, which is beneficial to improving the forming quality of thin glass sheets.

[0015] 3. The device for secondary glass sheet drawing described in this utility model includes a rolling mechanism comprising multiple rolling components and edge-pulling components arranged sequentially from top to bottom. After the molten glass flows out from the outlet, it passes through each extrusion channel in sequence, gradually controlling the flow rate of the molten glass and rolling to reduce the thickness. Finally, it is further drawn by the edge-pulling roller to obtain a thin glass sheet with a smaller thickness, which helps to ensure the forming quality of the thin glass sheet. Attached Figure Description

[0016] Figure 1 This is a front view of the apparatus for secondary glass sheet drawing described in the embodiment; Figure 2 This is a side view of the apparatus for secondary glass sheet drawing as described in the embodiment; Figure 3 This is a top view of the apparatus for secondary glass sheet drawing described in the embodiment; The components include: heating furnace 1, calendering mechanism 2, outer shell 3, furnace body 4, accommodating cavity 5, feed port 6, discharge port 7, heating element 8, partition plate 9, cavity 10, silicon molybdenum rod 11, heat preservation furnace 12, clearance port 13, forming port 14, calendering assembly 15, calendering roller 16, edge pulling assembly 17, and edge pulling roller 18. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0018] Example: Please see Figure 1 , Figure 2 and Figure 3A device for secondary glass sheet drawing includes a heating furnace 1 and a rolling mechanism 2. The heating furnace 1 includes an outer shell 3 and a furnace body 4, with the furnace body 4 disposed within the outer shell. The furnace body 4 has a receiving cavity 5 for placing the glass sheet. The upper end of the heating furnace 1 has an inlet 6 vertically communicating with the receiving cavity 5, and the lower end has an outlet 7 vertically communicating with the receiving cavity 5. The size of the inlet 6 is larger than the cross-sectional size of the glass sheet, and the size of the outlet 7 is smaller than the cross-sectional size of the glass sheet. The heating furnace 1 has a device for... The heating element 8 of the heating cavity 5 is provided in multiples and is symmetrically distributed on both sides of the cavity 5 through the shell; the rolling mechanism 2 is located below the heating furnace 1 and directly opposite the discharge port 7. The rolling mechanism 2 is used to extrude the glass liquid flowing out of the discharge port 7 into thin glass sheets; in this embodiment, the outer shell 3 is made of heat-insulating material to reduce heat loss of the device and improve heating efficiency, and the furnace body 4 is made of heat-conducting material so that the heating element 8 can heat the block glass in the cavity 5 through heat conduction. The block glass can be glass brick or glass plate.

[0019] The device for secondary glass sheet drawing of this utility model involves placing pre-made block glass into the receiving cavity 5 through the feed port 6. The heating element 8 melts the block glass into a liquid state. Under the action of gravity, the molten glass automatically flows downward from the discharge port 7. After reaching the rolling mechanism 2, the molten glass is extruded into thin glass sheets. The device uses block glass as raw material. Since the block glass has already formed a glass network structure, secondary melting only requires breaking the silicon-oxygen bonds again. The required temperature is 100-200°C lower than the temperature of melting the batch material. The requirements for the materials and performance of the heating furnace 1 and the rolling mechanism 2 are lower, and the energy consumption is also lower. Moreover, melting the block glass does not require complex reactions such as decomposition and combination. The melting process is simple and the output speed is fast. The block glass can be provided by the supplier or obtained by melting it in-house. Even if it needs to be obtained in-house, the requirements for controlling parameters such as the temperature and flow rate of the molten glass during its forming process are lower compared to directly forming sheet glass. The forming process is simple and efficient, and it can be obtained through ordinary heating furnace 1 and forming equipment. Therefore, this utility model can effectively solve the problem of the current difficulty in manufacturing thin sheet glass, which is conducive to reducing the difficulty and cost of manufacturing thin sheet glass and improving manufacturing efficiency.

[0020] Please see Figure 1 , Figure 2 and Figure 3The accommodating cavity 5 is provided with multiple partitions 9 to form multiple cavities 10. The discharge port 7 is vertically connected to the cavity 10 located in the middle. There are multiple inlet ports 6, which are connected to each cavity 10. The lower end of the partition 9 is spaced from the bottom surface of the accommodating cavity 5, and the lower ends of adjacent cavities 10 are horizontally connected. The cavity 10 extends vertically and has a rectangular cross-section. Each cavity 10 is distributed along its own width direction, and the cross-sectional dimensions of the cavity 10 are adapted to the cross-sectional dimensions of the block glass. In this embodiment, the partition 9 is also formed by the furnace body 4. In this way, multiple blocks of glass can be vertically inserted and placed in each cavity 10, which can prevent the blocks of glass from tilting or moving laterally in the accommodating cavity 5, thereby ensuring that the blocks of glass move down in an orderly manner as they are heated and melted. This facilitates the continuous addition of raw materials during the production process, so that the heating furnace 1 can stably output molten glass to the rolling mechanism 2.

[0021] Please see Figure 1 , Figure 2 and Figure 3 Each cavity 10 is equipped with multiple heating elements 8, which are symmetrically distributed on both sides of the width direction of the cavity 10. The heating elements 8 on the same side are vertically distributed. In this way, when the block glass is vertically inserted into the cavity 10, the heating elements 8 are distributed on both sides of the thickness direction of the block glass. This not only makes the thickness of the furnace body 4 that needs to be heated thinner, but also increases the heat radiation area, which is beneficial to improving the heating efficiency of the heating furnace 1 for the block glass. The vertical distribution of the heating elements 8 on the same side allows for independent control of the heating power by wiring them separately, so as to achieve orderly melting of the block glass in the vertical direction and make the heating furnace 1 more flexible in use.

[0022] Please see Figure 1 , Figure 2 and Figure 3 The heating element 8 is a silicon molybdenum rod 11, and the axial direction of the silicon molybdenum rod 11 corresponds to the length direction of the cross-section of the cavity 10. In this way, when the block glass is vertically inserted into the cavity 10, the axial direction of the silicon molybdenum rod 11 corresponds to the width direction of the block glass, which can provide uniform heating for the block glass. In this embodiment, the silicon molybdenum rod 11 passes through the furnace body 4, and both ends of the silicon molybdenum rod 11 extend through the shell to the outside of the heating furnace 1 so as to connect to the power supply. The silicon molybdenum rod 11 heats the accommodating cavity 5 through the heat transfer of the furnace body 4.

[0023] Please see Figure 1 , Figure 2 and Figure 3The device for secondary glass sheet drawing also includes a heat preservation furnace 12, which is connected below the heating furnace 1. The rolling mechanism 2 is located inside the heat preservation furnace 12. The upper end of the heat preservation furnace 12 is provided with a clearance opening 13 that is directly opposite to the discharge port 7 and is adapted in size. The lower end of the heat preservation furnace 12 is provided with a forming opening 14 for thin glass sheets to pass through. In this way, the heat preservation furnace 12 provides a certain heating and heat preservation effect for the molten glass flowing out of the discharge port 7 and passing through the rolling mechanism 2, preventing the molten glass from cooling and solidifying rapidly after flowing out of the discharge port 7, ensuring that the molten glass still has good fluidity when it is in the rolling mechanism 2, so that the rolling mechanism 2 can smoothly roll the molten glass into thin glass sheets.

[0024] Please see Figure 1 , Figure 2 and Figure 3 The rolling mechanism 2 includes a rolling assembly 15, which includes two rolling rollers 16 spaced apart. The direction of the spaced distribution corresponds to the width direction of the cross-section of the accommodating cavity 5, and the axial direction of the rolling rollers 16 corresponds to the length direction of the cross-section of the accommodating cavity 5. An extrusion channel is formed between the two rolling rollers 16. In this way, the molten glass formed by melting block glass in the heating furnace 1 flows out from the discharge port 7 under the action of gravity. When the molten glass reaches the rolling assembly 15, it is drawn into the extrusion channel formed between the two rolling rollers 16 under the action of friction and is extruded into thin glass sheets by the two rolling rollers 16.

[0025] Please see Figure 1 , Figure 2 and Figure 3 There are multiple rolling components 15 arranged vertically, and the width of the extrusion channel in each rolling component 15 decreases sequentially from top to bottom. In this embodiment, there are two rolling components 15. In this way, the molten glass formed by melting block glass in the heating furnace 1 flows out from the discharge port 7 under the action of gravity and passes through each extrusion channel in sequence. Each extrusion channel narrows sequentially from top to bottom, gradually controlling the flow rate of molten glass, and finally forming a thin sheet of glass with a smaller thickness. Compared with one-time rolling, it is not only easier to control the flow rate of molten glass, but also the gradual rolling and narrowing is conducive to improving the forming quality of thin sheet glass.

[0026] Furthermore, the calendering mechanism 2 also includes an edge-pulling assembly 17, which is located below the calendering assembly 15 and on one side of the extrusion channel width direction. The edge-pulling assembly 17 includes two edge-pulling rollers 18, which are respectively located at both ends of the extrusion channel length direction. The axial direction of the edge-pulling rollers 18 corresponds to the axial direction of the calendering rollers 16. The edge-pulling rollers 18 are used to stretch the thin glass sheet laterally. In this way, the edge-pulling rollers 18 rotate horizontally, which can pull the edge of the thin glass sheet passing through the lowest extrusion channel. This not only prevents the glass from shrinking during the cooling process, but also allows it to be further drawn into a thin glass sheet with a wider width and a thinner thickness. In this embodiment, the roller surface of the edge-pulling rollers 18 has anti-slip teeth. In this way, when the thin glass sheet passes through the edge-pulling rollers 18, the glass that has not been fully cured can fall into the gap between the anti-slip teeth, thereby increasing the friction between the roller surface of the edge-pulling rollers 18 and the thin glass sheet, so as to ensure that the edge-pulling rollers 18 can stably perform the edge-pulling function.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. An apparatus for secondary glass sheet drawing, characterized in that: The system includes a heating furnace and a rolling mechanism. The heating furnace includes an outer shell and a furnace body, with the furnace body located inside the outer shell. The furnace body has a receiving cavity for placing bulk glass. The upper end of the heating furnace has an inlet that is vertically connected to the receiving cavity, and the lower end has an outlet that is vertically connected to the receiving cavity. The size of the inlet is larger than the cross-sectional size of the bulk glass, and the size of the outlet is smaller than the cross-sectional size of the bulk glass. There are multiple heating elements for heating the receiving cavity, located outside the receiving cavity, and they are symmetrically distributed on both sides of the receiving cavity, penetrating the outer shell. The rolling mechanism is located below the heating furnace and directly opposite the outlet. The rolling mechanism is used to extrude the molten glass flowing out of the outlet into thin sheets of glass.

2. The apparatus for secondary glass sheet drawing according to claim 1, characterized in that: The accommodating cavity is equipped with multiple partitions to form multiple chambers. The discharge port is vertically connected to the chamber located in the middle, and there are multiple inlet ports that are connected to each corresponding chamber. The lower end of the partition is spaced from the bottom surface of the accommodating cavity, and the lower ends of adjacent chambers are horizontally connected.

3. The apparatus for secondary glass sheet drawing according to claim 2, characterized in that: The cavity extends vertically and has a rectangular cross-section. Each cavity is distributed along its own width direction, and the cross-sectional dimensions of the cavity are adapted to the cross-sectional dimensions of the block glass.

4. The apparatus for secondary glass sheet drawing according to claim 3, characterized in that: Each cavity has multiple heating elements, which are symmetrically distributed on both sides of the cavity width direction, with the heating elements on the same side arranged vertically.

5. The apparatus for secondary glass sheet drawing according to claim 3, characterized in that: The heating element is a silicon molybdenum rod, and the axial direction of the silicon molybdenum rod corresponds to the length direction of the cavity cross-section.

6. The apparatus for secondary glass sheet drawing according to claim 1, characterized in that: The device for secondary glass sheet drawing also includes a heat preservation furnace, which is connected below the heating furnace. The rolling mechanism is located inside the heat preservation furnace. The upper end of the heat preservation furnace is provided with a clearance opening that is directly opposite to the discharge port and is of the same size. The lower end of the heat preservation furnace is provided with a forming port for thin glass sheets to pass through.

7. The apparatus for secondary glass sheet drawing according to claim 1, characterized in that: The calendering mechanism includes a calendering assembly, which includes two calendering rolls spaced apart. The direction of the spaced-apart distribution corresponds to the width direction of the cross-section of the accommodating cavity, and the axial direction of the calendering rolls corresponds to the length direction of the cross-section of the accommodating cavity. An extrusion channel is formed between the two calendering rolls.

8. The apparatus for secondary glass sheet drawing according to claim 7, characterized in that: There are multiple calendering assemblies arranged vertically, and the width of the extrusion channel in each calendering assembly decreases sequentially from top to bottom.

9. The apparatus for secondary glass sheet drawing according to claim 7, characterized in that: The calendering mechanism also includes an edge-pulling assembly, which is located below the calendering assembly and on one side of the extrusion channel width direction. The edge-pulling assembly includes two edge-pulling rollers located at both ends of the extrusion channel length direction. The axial direction of the edge-pulling rollers corresponds to the axial direction of the calendering rollers. The edge-pulling rollers are used to laterally stretch the thin glass sheet.

10. The apparatus for secondary glass sheet drawing according to claim 9, characterized in that: The roller surface of the edge-pulling roller has anti-slip teeth.

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